1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR, /* variable */
61 BSP_PARM, /* parameter */
66 static tree grokparms (tree parmlist, tree *);
67 static const char *redeclaration_error_message (tree, tree);
69 static int decl_jump_unsafe (tree);
70 static void require_complete_types_for_parms (tree);
71 static int ambi_op_p (enum tree_code);
72 static int unary_op_p (enum tree_code);
73 static void push_local_name (tree);
74 static tree grok_reference_init (tree, tree, tree, int);
75 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
77 static int check_static_variable_definition (tree, tree);
78 static void record_unknown_type (tree, const char *);
79 static tree builtin_function_1 (tree, tree, bool);
80 static tree build_library_fn_1 (tree, enum tree_code, tree);
81 static int member_function_or_else (tree, tree, enum overload_flags);
82 static void bad_specifiers (tree, enum bad_spec_place, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree);
85 static hashval_t typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree local_variable_p_walkfn (tree *, int *, void *);
88 static tree record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types);
90 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
91 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
92 static void maybe_deduce_size_from_array_init (tree, tree);
93 static void layout_var_decl (tree);
94 static tree check_initializer (tree, tree, int, VEC(tree,gc) **);
95 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
96 static void save_function_data (tree);
97 static void copy_type_enum (tree , tree);
98 static void check_function_type (tree, tree);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree);
103 static tree create_array_type_for_decl (tree, tree, tree);
104 static tree get_atexit_node (void);
105 static tree get_dso_handle_node (void);
106 static tree start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree cp_make_fname_decl (location_t, tree, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind, tree, tree);
112 static tree push_cp_library_fn (enum tree_code, tree);
113 static tree build_cp_library_fn (tree, enum tree_code, tree);
114 static void store_parm_decls (tree);
115 static void initialize_local_var (tree, tree);
116 static void expand_static_init (tree, tree);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees[CPTI_MAX];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates;
175 /* A node for the integer constant 2. */
177 tree integer_two_node;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry {
183 struct named_label_use_entry *next;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 cp_binding_level *binding_level;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry {
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 cp_binding_level *binding_level;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree,gc) *bad_decls;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry *uses;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls;
241 VEC(tree, gc) *deferred_mark_used_calls;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d {
255 tree incomplete_type;
258 DEF_VEC_O(incomplete_var);
259 DEF_VEC_ALLOC_O(incomplete_var,gc);
261 static GTY(()) VEC(incomplete_var,gc) *incomplete_vars;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes)
270 int n_template_parm_scopes = 0;
271 int seen_specialization_p = 0;
272 int innermost_specialization_p = 0;
275 /* Scan through the template parameter scopes. */
276 for (b = current_binding_level;
277 b->kind == sk_template_parms;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b->explicit_spec_p)
291 if (n_template_parm_scopes == 0)
292 innermost_specialization_p = 1;
294 seen_specialization_p = 1;
296 else if (seen_specialization_p == 1)
297 return tsk_invalid_member_spec;
299 ++n_template_parm_scopes;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation)
305 if (n_template_parm_scopes != 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst;
314 return tsk_expl_inst;
317 if (n_template_parm_scopes < n_class_scopes)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms;
326 else if (n_template_parm_scopes == n_class_scopes)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes > n_class_scopes + 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label, tree old_value)
367 if (!processing_template_decl)
369 if (DECL_INITIAL (label) == NULL_TREE)
373 error ("label %q+D used but not defined", label);
374 location = input_location; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location, DECL_NAME (label));
379 warn_for_unused_label (label);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot, void *data)
392 struct named_label_entry *ent = (struct named_label_entry *) *slot;
393 tree block = (tree) data;
395 pop_label (ent->label_decl, NULL_TREE);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent->label_decl) = BLOCK_VARS (block);
400 BLOCK_VARS (block) = ent->label_decl;
402 htab_clear_slot (named_labels, slot);
408 pop_labels (tree block)
412 htab_traverse (named_labels, pop_labels_1, block);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label, tree old_value)
422 struct named_label_entry dummy;
425 pop_label (label, old_value);
427 dummy.label_decl = label;
428 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
429 htab_clear_slot (named_labels, slot);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk)
450 cp_binding_level *scope;
452 for (scope = current_binding_level;
453 scope && scope != enclosing_blk;
454 scope = scope->level_chain)
458 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
459 objc_volatilize_decl (decl);
461 /* Do not climb up past the current function. */
462 if (scope->kind == sk_function_parms)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot, void *data)
472 struct named_label_entry *ent = (struct named_label_entry *) *slot;
473 cp_binding_level *bl = (cp_binding_level *) data;
474 cp_binding_level *obl = bl->level_chain;
476 if (ent->binding_level == bl)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
484 : TREE_CHAIN (decl)))
485 if (decl_jump_unsafe (decl))
486 VEC_safe_push (tree, gc, ent->bad_decls, decl);
488 ent->binding_level = obl;
489 ent->names_in_scope = obl->names;
493 ent->in_try_scope = true;
496 ent->in_catch_scope = true;
499 ent->in_omp_scope = true;
507 struct named_label_use_entry *use;
509 for (use = ent->uses; use ; use = use->next)
510 if (use->binding_level == bl)
512 use->binding_level = obl;
513 use->names_in_scope = obl->names;
514 if (bl->kind == sk_omp)
515 use->in_omp_scope = true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep, int reverse, int functionbody)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope;
554 cp_label_binding *label_bind;
556 timevar_start (TV_NAME_LOOKUP);
561 gcc_assert (current_binding_level->kind != sk_class);
563 if (current_binding_level->kind == sk_cleanup)
565 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
567 gcc_assert (!VEC_length(cp_class_binding,
568 current_binding_level->class_shadowed));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep == 0 || keep == 1);
575 if (current_binding_level->keep)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun && !functionbody && named_labels)
581 htab_traverse (named_labels, poplevel_named_label_1,
582 current_binding_level);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level->names
590 = decls = nreverse (current_binding_level->names);
592 decls = current_binding_level->names;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep == 1 || functionbody)
599 block = make_node (BLOCK);
600 if (block != NULL_TREE)
602 BLOCK_VARS (block) = decls;
603 BLOCK_SUBBLOCKS (block) = subblocks;
606 /* In each subblock, record that this is its superior. */
608 for (link = subblocks; link; link = BLOCK_CHAIN (link))
609 BLOCK_SUPERCONTEXT (link) = block;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable || warn_unused_but_set_variable)
620 && !processing_template_decl)
621 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
622 if (TREE_CODE (decl) == VAR_DECL
623 && (! TREE_USED (decl) || !DECL_READ_P (decl))
624 && ! DECL_IN_SYSTEM_HEADER (decl)
625 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
627 if (! TREE_USED (decl))
628 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
629 else if (DECL_CONTEXT (decl) == current_function_decl
630 && TREE_TYPE (decl) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
632 && errorcount == unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
636 warning (OPT_Wunused_but_set_variable,
637 "variable %q+D set but not used", decl);
638 unused_but_set_errorcount = errorcount;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link = decls; link; link = TREE_CHAIN (link))
645 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
646 /* It's hard to make this ARM compatibility hack play nicely with
647 lambdas, and it really isn't necessary in C++11 mode. */
648 && cxx_dialect < cxx0x
651 tree name = DECL_NAME (link);
655 ob = outer_binding (name,
656 IDENTIFIER_BINDING (name),
659 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
661 ns_binding = NULL_TREE;
663 if (ob && ob->scope == current_binding_level->level_chain)
664 /* We have something like:
669 and we are leaving the `for' scope. There's no reason to
670 keep the binding of the inner `i' in this case. */
671 pop_binding (name, link);
672 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
673 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
674 /* Here, we have something like:
682 We must pop the for-scope binding so we know what's a
683 type and what isn't. */
684 pop_binding (name, link);
687 /* Mark this VAR_DECL as dead so that we can tell we left it
688 there only for backward compatibility. */
689 DECL_DEAD_FOR_LOCAL (link) = 1;
691 /* Keep track of what should have happened when we
692 popped the binding. */
695 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
696 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
699 /* Add it to the list of dead variables in the next
700 outermost binding to that we can remove these when we
701 leave that binding. */
702 VEC_safe_push (tree, gc,
703 current_binding_level->level_chain->dead_vars_from_for,
706 /* Although we don't pop the cxx_binding, we do clear
707 its SCOPE since the scope is going away now. */
708 IDENTIFIER_BINDING (name)->scope
709 = current_binding_level->level_chain;
716 /* Remove the binding. */
719 if (TREE_CODE (decl) == TREE_LIST)
720 decl = TREE_VALUE (decl);
723 if (TREE_CODE (name) == OVERLOAD)
724 name = OVL_FUNCTION (name);
726 gcc_assert (DECL_P (name));
727 pop_binding (DECL_NAME (name), decl);
731 /* Remove declarations for any `for' variables from inner scopes
732 that we kept around. */
733 FOR_EACH_VEC_ELT_REVERSE (tree, current_binding_level->dead_vars_from_for,
735 pop_binding (DECL_NAME (decl), decl);
737 /* Restore the IDENTIFIER_TYPE_VALUEs. */
738 for (link = current_binding_level->type_shadowed;
739 link; link = TREE_CHAIN (link))
740 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
742 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
743 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding,
744 current_binding_level->shadowed_labels,
746 pop_local_label (label_bind->label, label_bind->prev_value);
748 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
749 list if a `using' declaration put them there. The debugging
750 back ends won't understand OVERLOAD, so we remove them here.
751 Because the BLOCK_VARS are (temporarily) shared with
752 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
753 popped all the bindings. */
758 for (d = &BLOCK_VARS (block); *d; )
760 if (TREE_CODE (*d) == TREE_LIST)
761 *d = TREE_CHAIN (*d);
763 d = &DECL_CHAIN (*d);
767 /* If the level being exited is the top level of a function,
768 check over all the labels. */
771 /* Since this is the top level block of a function, the vars are
772 the function's parameters. Don't leave them in the BLOCK
773 because they are found in the FUNCTION_DECL instead. */
774 BLOCK_VARS (block) = 0;
778 kind = current_binding_level->kind;
779 if (kind == sk_cleanup)
783 /* If this is a temporary binding created for a cleanup, then we'll
784 have pushed a statement list level. Pop that, create a new
785 BIND_EXPR for the block, and insert it into the stream. */
786 stmt = pop_stmt_list (current_binding_level->statement_list);
787 stmt = c_build_bind_expr (input_location, block, stmt);
794 /* The current function is being defined, so its DECL_INITIAL
795 should be error_mark_node. */
796 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
797 DECL_INITIAL (current_function_decl) = block;
800 current_binding_level->blocks
801 = block_chainon (current_binding_level->blocks, block);
803 /* If we did not make a block for the level just exited,
804 any blocks made for inner levels
805 (since they cannot be recorded as subblocks in that level)
806 must be carried forward so they will later become subblocks
807 of something else. */
809 current_binding_level->blocks
810 = block_chainon (current_binding_level->blocks, subblocks);
812 /* Each and every BLOCK node created here in `poplevel' is important
813 (e.g. for proper debugging information) so if we created one
814 earlier, mark it as "used". */
816 TREE_USED (block) = 1;
818 /* All temporary bindings created for cleanups are popped silently. */
819 if (kind == sk_cleanup)
822 timevar_stop (TV_NAME_LOOKUP);
826 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
827 itself, calling F for each. The DATA is passed to F as well. */
830 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
833 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
835 result |= (*f) (name_space, data);
837 for (; current; current = DECL_CHAIN (current))
838 result |= walk_namespaces_r (current, f, data);
843 /* Walk all the namespaces, calling F for each. The DATA is passed to
847 walk_namespaces (walk_namespaces_fn f, void* data)
849 return walk_namespaces_r (global_namespace, f, data);
852 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
853 DATA is non-NULL, this is the last time we will call
854 wrapup_global_declarations for this NAMESPACE. */
857 wrapup_globals_for_namespace (tree name_space, void* data)
859 cp_binding_level *level = NAMESPACE_LEVEL (name_space);
860 VEC(tree,gc) *statics = level->static_decls;
861 tree *vec = VEC_address (tree, statics);
862 int len = VEC_length (tree, statics);
863 int last_time = (data != 0);
867 check_global_declarations (vec, len);
868 emit_debug_global_declarations (vec, len);
872 /* Write out any globals that need to be output. */
873 return wrapup_global_declarations (vec, len);
877 /* In C++, you don't have to write `struct S' to refer to `S'; you
878 can just use `S'. We accomplish this by creating a TYPE_DECL as
879 if the user had written `typedef struct S S'. Create and return
880 the TYPE_DECL for TYPE. */
883 create_implicit_typedef (tree name, tree type)
887 decl = build_decl (input_location, TYPE_DECL, name, type);
888 DECL_ARTIFICIAL (decl) = 1;
889 /* There are other implicit type declarations, like the one *within*
890 a class that allows you to write `S::S'. We must distinguish
892 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
893 TYPE_NAME (type) = decl;
894 TYPE_STUB_DECL (type) = decl;
899 /* Remember a local name for name-mangling purposes. */
902 push_local_name (tree decl)
907 timevar_start (TV_NAME_LOOKUP);
909 name = DECL_NAME (decl);
911 nelts = VEC_length (tree, local_names);
912 for (i = 0; i < nelts; i++)
914 t = VEC_index (tree, local_names, i);
915 if (DECL_NAME (t) == name)
917 if (!DECL_LANG_SPECIFIC (decl))
918 retrofit_lang_decl (decl);
919 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
920 if (DECL_LANG_SPECIFIC (t))
921 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
923 DECL_DISCRIMINATOR (decl) = 1;
925 VEC_replace (tree, local_names, i, decl);
926 timevar_stop (TV_NAME_LOOKUP);
931 VEC_safe_push (tree, gc, local_names, decl);
932 timevar_stop (TV_NAME_LOOKUP);
935 /* Subroutine of duplicate_decls: return truthvalue of whether
936 or not types of these decls match.
938 For C++, we must compare the parameter list so that `int' can match
939 `int&' in a parameter position, but `int&' is not confused with
943 decls_match (tree newdecl, tree olddecl)
947 if (newdecl == olddecl)
950 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
951 /* If the two DECLs are not even the same kind of thing, we're not
952 interested in their types. */
955 if (TREE_CODE (newdecl) == FUNCTION_DECL)
957 tree f1 = TREE_TYPE (newdecl);
958 tree f2 = TREE_TYPE (olddecl);
959 tree p1 = TYPE_ARG_TYPES (f1);
960 tree p2 = TYPE_ARG_TYPES (f2);
962 /* Specializations of different templates are different functions
963 even if they have the same type. */
964 tree t1 = (DECL_USE_TEMPLATE (newdecl)
965 ? DECL_TI_TEMPLATE (newdecl)
967 tree t2 = (DECL_USE_TEMPLATE (olddecl)
968 ? DECL_TI_TEMPLATE (olddecl)
973 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
974 && ! (DECL_EXTERN_C_P (newdecl)
975 && DECL_EXTERN_C_P (olddecl)))
978 #ifdef NO_IMPLICIT_EXTERN_C
979 /* A new declaration doesn't match a built-in one unless it
980 is also extern "C". */
981 if (DECL_IS_BUILTIN (olddecl)
982 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
986 if (TREE_CODE (f1) != TREE_CODE (f2))
989 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
991 if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
992 && (DECL_BUILT_IN (olddecl)
993 #ifndef NO_IMPLICIT_EXTERN_C
994 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
995 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
999 types_match = self_promoting_args_p (p1);
1000 if (p1 == void_list_node)
1001 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1003 #ifndef NO_IMPLICIT_EXTERN_C
1004 else if (!prototype_p (f1)
1005 && (DECL_EXTERN_C_P (olddecl)
1006 && DECL_IN_SYSTEM_HEADER (olddecl)
1007 && !DECL_CLASS_SCOPE_P (olddecl))
1008 && (DECL_EXTERN_C_P (newdecl)
1009 && DECL_IN_SYSTEM_HEADER (newdecl)
1010 && !DECL_CLASS_SCOPE_P (newdecl)))
1012 types_match = self_promoting_args_p (p2);
1013 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1019 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1020 || comp_type_attributes (TREE_TYPE (newdecl),
1021 TREE_TYPE (olddecl)) != 0);
1026 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1028 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1029 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1032 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1033 DECL_TEMPLATE_PARMS (olddecl)))
1036 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1037 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1038 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1040 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1041 DECL_TEMPLATE_RESULT (newdecl));
1045 /* Need to check scope for variable declaration (VAR_DECL).
1046 For typedef (TYPE_DECL), scope is ignored. */
1047 if (TREE_CODE (newdecl) == VAR_DECL
1048 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1050 Two declarations for an object with C language linkage
1051 with the same name (ignoring the namespace that qualify
1052 it) that appear in different namespace scopes refer to
1054 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1057 if (TREE_TYPE (newdecl) == error_mark_node)
1058 types_match = TREE_TYPE (olddecl) == error_mark_node;
1059 else if (TREE_TYPE (olddecl) == NULL_TREE)
1060 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1061 else if (TREE_TYPE (newdecl) == NULL_TREE)
1064 types_match = comptypes (TREE_TYPE (newdecl),
1065 TREE_TYPE (olddecl),
1066 COMPARE_REDECLARATION);
1072 /* If NEWDECL is `static' and an `extern' was seen previously,
1073 warn about it. OLDDECL is the previous declaration.
1075 Note that this does not apply to the C++ case of declaring
1076 a variable `extern const' and then later `const'.
1078 Don't complain about built-in functions, since they are beyond
1079 the user's control. */
1082 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1084 if (TREE_CODE (newdecl) == TYPE_DECL
1085 || TREE_CODE (newdecl) == TEMPLATE_DECL
1086 || TREE_CODE (newdecl) == CONST_DECL
1087 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1090 /* Don't get confused by static member functions; that's a different
1092 if (TREE_CODE (newdecl) == FUNCTION_DECL
1093 && DECL_STATIC_FUNCTION_P (newdecl))
1096 /* If the old declaration was `static', or the new one isn't, then
1097 everything is OK. */
1098 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1101 /* It's OK to declare a builtin function as `static'. */
1102 if (TREE_CODE (olddecl) == FUNCTION_DECL
1103 && DECL_ARTIFICIAL (olddecl))
1106 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1107 permerror (input_location, "previous declaration of %q+D", olddecl);
1110 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1111 function templates. If their exception specifications do not
1112 match, issue a diagnostic. */
1115 check_redeclaration_exception_specification (tree new_decl,
1120 tree new_exceptions;
1121 tree old_exceptions;
1123 new_type = TREE_TYPE (new_decl);
1124 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1125 old_type = TREE_TYPE (old_decl);
1126 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1130 If any declaration of a function has an exception-specification,
1131 all declarations, including the definition and an explicit
1132 specialization, of that function shall have an
1133 exception-specification with the same set of type-ids. */
1134 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1135 && ! DECL_IS_BUILTIN (old_decl)
1137 && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1139 error ("declaration of %qF has a different exception specifier",
1141 error ("from previous declaration %q+F", old_decl);
1145 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1146 Otherwise issue diagnostics. */
1149 validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1151 old_decl = STRIP_TEMPLATE (old_decl);
1152 new_decl = STRIP_TEMPLATE (new_decl);
1153 if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1154 || !VAR_OR_FUNCTION_DECL_P (new_decl))
1156 if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1157 == DECL_DECLARED_CONSTEXPR_P (new_decl))
1159 if (TREE_CODE (old_decl) == FUNCTION_DECL && DECL_BUILT_IN (old_decl))
1161 /* Hide a built-in declaration. */
1162 DECL_DECLARED_CONSTEXPR_P (old_decl)
1163 = DECL_DECLARED_CONSTEXPR_P (new_decl);
1166 error ("redeclaration %qD differs in %<constexpr%>", new_decl);
1167 error ("from previous declaration %q+D", old_decl);
1171 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1172 && lookup_attribute ("gnu_inline", \
1173 DECL_ATTRIBUTES (fn)))
1175 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1176 If the redeclaration is invalid, a diagnostic is issued, and the
1177 error_mark_node is returned. Otherwise, OLDDECL is returned.
1179 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1182 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1185 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1187 unsigned olddecl_uid = DECL_UID (olddecl);
1188 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1189 int new_defines_function = 0;
1190 tree new_template_info;
1192 if (newdecl == olddecl)
1195 types_match = decls_match (newdecl, olddecl);
1197 /* If either the type of the new decl or the type of the old decl is an
1198 error_mark_node, then that implies that we have already issued an
1199 error (earlier) for some bogus type specification, and in that case,
1200 it is rather pointless to harass the user with yet more error message
1201 about the same declaration, so just pretend the types match here. */
1202 if (TREE_TYPE (newdecl) == error_mark_node
1203 || TREE_TYPE (olddecl) == error_mark_node)
1204 return error_mark_node;
1206 if (UDLIT_OPER_P (DECL_NAME (newdecl))
1207 && UDLIT_OPER_P (DECL_NAME (olddecl)))
1209 if (TREE_CODE (newdecl) == TEMPLATE_DECL
1210 && TREE_CODE (olddecl) != TEMPLATE_DECL
1211 && check_raw_literal_operator (olddecl))
1212 error ("literal operator template %q+D conflicts with"
1213 " raw literal operator %qD", newdecl, olddecl);
1214 else if (TREE_CODE (newdecl) != TEMPLATE_DECL
1215 && TREE_CODE (olddecl) == TEMPLATE_DECL
1216 && check_raw_literal_operator (newdecl))
1217 error ("raw literal operator %q+D conflicts with"
1218 " literal operator template %qD", newdecl, olddecl);
1221 if (DECL_P (olddecl)
1222 && TREE_CODE (newdecl) == FUNCTION_DECL
1223 && TREE_CODE (olddecl) == FUNCTION_DECL
1224 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1226 if (DECL_DECLARED_INLINE_P (newdecl)
1227 && DECL_UNINLINABLE (newdecl)
1228 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1229 /* Already warned elsewhere. */;
1230 else if (DECL_DECLARED_INLINE_P (olddecl)
1231 && DECL_UNINLINABLE (olddecl)
1232 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1233 /* Already warned. */;
1234 else if (DECL_DECLARED_INLINE_P (newdecl)
1235 && DECL_UNINLINABLE (olddecl)
1236 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1238 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1240 warning (OPT_Wattributes, "previous declaration of %q+D "
1241 "with attribute noinline", olddecl);
1243 else if (DECL_DECLARED_INLINE_P (olddecl)
1244 && DECL_UNINLINABLE (newdecl)
1245 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1247 warning (OPT_Wattributes, "function %q+D redeclared with "
1248 "attribute noinline", newdecl);
1249 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1254 /* Check for redeclaration and other discrepancies. */
1255 if (TREE_CODE (olddecl) == FUNCTION_DECL
1256 && DECL_ARTIFICIAL (olddecl))
1258 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1259 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1261 /* Avoid warnings redeclaring built-ins which have not been
1262 explicitly declared. */
1263 if (DECL_ANTICIPATED (olddecl))
1266 /* If you declare a built-in or predefined function name as static,
1267 the old definition is overridden, but optionally warn this was a
1268 bad choice of name. */
1269 if (! TREE_PUBLIC (newdecl))
1271 warning (OPT_Wshadow,
1272 DECL_BUILT_IN (olddecl)
1273 ? G_("shadowing built-in function %q#D")
1274 : G_("shadowing library function %q#D"), olddecl);
1275 /* Discard the old built-in function. */
1278 /* If the built-in is not ansi, then programs can override
1279 it even globally without an error. */
1280 else if (! DECL_BUILT_IN (olddecl))
1281 warning (0, "library function %q#D redeclared as non-function %q#D",
1285 error ("declaration of %q#D", newdecl);
1286 error ("conflicts with built-in declaration %q#D",
1291 else if (!types_match)
1293 /* Avoid warnings redeclaring built-ins which have not been
1294 explicitly declared. */
1295 if (DECL_ANTICIPATED (olddecl))
1297 /* Deal with fileptr_type_node. FILE type is not known
1298 at the time we create the builtins. */
1301 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1302 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1304 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1307 else if (TREE_VALUE (t2) == fileptr_type_node)
1309 tree t = TREE_VALUE (t1);
1311 if (TREE_CODE (t) == POINTER_TYPE
1312 && TYPE_NAME (TREE_TYPE (t))
1313 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1314 == get_identifier ("FILE")
1315 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1317 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1319 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1320 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1321 types_match = decls_match (newdecl, olddecl);
1323 return duplicate_decls (newdecl, olddecl,
1325 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1328 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1331 else if ((DECL_EXTERN_C_P (newdecl)
1332 && DECL_EXTERN_C_P (olddecl))
1333 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1334 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1336 /* A near match; override the builtin. */
1338 if (TREE_PUBLIC (newdecl))
1340 warning (0, "new declaration %q#D", newdecl);
1341 warning (0, "ambiguates built-in declaration %q#D",
1345 warning (OPT_Wshadow,
1346 DECL_BUILT_IN (olddecl)
1347 ? G_("shadowing built-in function %q#D")
1348 : G_("shadowing library function %q#D"), olddecl);
1351 /* Discard the old built-in function. */
1354 /* Replace the old RTL to avoid problems with inlining. */
1355 COPY_DECL_RTL (newdecl, olddecl);
1357 /* Even if the types match, prefer the new declarations type for
1358 built-ins which have not been explicitly declared, for
1359 exception lists, etc... */
1360 else if (DECL_IS_BUILTIN (olddecl))
1362 tree type = TREE_TYPE (newdecl);
1363 tree attribs = (*targetm.merge_type_attributes)
1364 (TREE_TYPE (olddecl), type);
1366 type = cp_build_type_attribute_variant (type, attribs);
1367 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1370 /* If a function is explicitly declared "throw ()", propagate that to
1371 the corresponding builtin. */
1372 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1373 && DECL_ANTICIPATED (olddecl)
1374 && TREE_NOTHROW (newdecl)
1375 && !TREE_NOTHROW (olddecl))
1377 enum built_in_function fncode = DECL_FUNCTION_CODE (olddecl);
1378 tree tmpdecl = builtin_decl_explicit (fncode);
1379 if (tmpdecl && tmpdecl != olddecl && types_match)
1380 TREE_NOTHROW (tmpdecl) = 1;
1383 /* Whether or not the builtin can throw exceptions has no
1384 bearing on this declarator. */
1385 TREE_NOTHROW (olddecl) = 0;
1387 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1389 /* If a builtin function is redeclared as `static', merge
1390 the declarations, but make the original one static. */
1391 DECL_THIS_STATIC (olddecl) = 1;
1392 TREE_PUBLIC (olddecl) = 0;
1394 /* Make the old declaration consistent with the new one so
1395 that all remnants of the builtin-ness of this function
1396 will be banished. */
1397 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1398 COPY_DECL_RTL (newdecl, olddecl);
1401 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1403 /* C++ Standard, 3.3, clause 4:
1404 "[Note: a namespace name or a class template name must be unique
1405 in its declarative region (7.3.2, clause 14). ]" */
1406 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1407 && TREE_CODE (newdecl) != NAMESPACE_DECL
1408 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1409 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1410 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1411 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1413 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1414 && TREE_CODE (newdecl) != TYPE_DECL)
1415 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1416 && TREE_CODE (olddecl) != TYPE_DECL))
1418 /* We do nothing special here, because C++ does such nasty
1419 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1420 get shadowed, and know that if we need to find a TYPE_DECL
1421 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1422 slot of the identifier. */
1426 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1427 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1428 || (TREE_CODE (olddecl) == FUNCTION_DECL
1429 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1433 error ("%q#D redeclared as different kind of symbol", newdecl);
1434 if (TREE_CODE (olddecl) == TREE_LIST)
1435 olddecl = TREE_VALUE (olddecl);
1436 error ("previous declaration of %q+#D", olddecl);
1438 return error_mark_node;
1440 else if (!types_match)
1442 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1443 /* These are certainly not duplicate declarations; they're
1444 from different scopes. */
1447 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1449 /* The name of a class template may not be declared to refer to
1450 any other template, class, function, object, namespace, value,
1451 or type in the same scope. */
1452 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1453 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1455 error ("declaration of template %q#D", newdecl);
1456 error ("conflicts with previous declaration %q+#D", olddecl);
1458 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1459 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1460 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1461 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1462 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1463 DECL_TEMPLATE_PARMS (olddecl))
1464 /* Template functions can be disambiguated by
1466 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1467 TREE_TYPE (TREE_TYPE (olddecl))))
1469 error ("new declaration %q#D", newdecl);
1470 error ("ambiguates old declaration %q+#D", olddecl);
1474 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1476 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1478 error ("declaration of C function %q#D conflicts with",
1480 error ("previous declaration %q+#D here", olddecl);
1483 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1484 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1486 error ("new declaration %q#D", newdecl);
1487 error ("ambiguates old declaration %q+#D", olddecl);
1488 return error_mark_node;
1495 error ("conflicting declaration %q#D", newdecl);
1496 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1497 return error_mark_node;
1500 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1501 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1502 && (!DECL_TEMPLATE_INFO (newdecl)
1503 || (DECL_TI_TEMPLATE (newdecl)
1504 != DECL_TI_TEMPLATE (olddecl))))
1505 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1506 && (!DECL_TEMPLATE_INFO (olddecl)
1507 || (DECL_TI_TEMPLATE (olddecl)
1508 != DECL_TI_TEMPLATE (newdecl))))))
1509 /* It's OK to have a template specialization and a non-template
1510 with the same type, or to have specializations of two
1511 different templates with the same type. Note that if one is a
1512 specialization, and the other is an instantiation of the same
1513 template, that we do not exit at this point. That situation
1514 can occur if we instantiate a template class, and then
1515 specialize one of its methods. This situation is valid, but
1516 the declarations must be merged in the usual way. */
1518 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1519 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1520 && !DECL_USE_TEMPLATE (newdecl))
1521 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1522 && !DECL_USE_TEMPLATE (olddecl))))
1523 /* One of the declarations is a template instantiation, and the
1524 other is not a template at all. That's OK. */
1526 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1528 /* In [namespace.alias] we have:
1530 In a declarative region, a namespace-alias-definition can be
1531 used to redefine a namespace-alias declared in that declarative
1532 region to refer only to the namespace to which it already
1535 Therefore, if we encounter a second alias directive for the same
1536 alias, we can just ignore the second directive. */
1537 if (DECL_NAMESPACE_ALIAS (newdecl)
1538 && (DECL_NAMESPACE_ALIAS (newdecl)
1539 == DECL_NAMESPACE_ALIAS (olddecl)))
1541 /* [namespace.alias]
1543 A namespace-name or namespace-alias shall not be declared as
1544 the name of any other entity in the same declarative region.
1545 A namespace-name defined at global scope shall not be
1546 declared as the name of any other entity in any global scope
1548 error ("declaration of namespace %qD conflicts with", newdecl);
1549 error ("previous declaration of namespace %q+D here", olddecl);
1550 return error_mark_node;
1554 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1557 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1558 if (DECL_NAME (olddecl) != NULL_TREE)
1559 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1560 ? G_("%q+#D previously defined here")
1561 : G_("%q+#D previously declared here"), olddecl);
1562 return error_mark_node;
1564 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1565 && DECL_INITIAL (olddecl) != NULL_TREE
1566 && !prototype_p (TREE_TYPE (olddecl))
1567 && prototype_p (TREE_TYPE (newdecl)))
1569 /* Prototype decl follows defn w/o prototype. */
1570 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1571 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1572 "follows non-prototype definition here");
1574 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1575 || TREE_CODE (olddecl) == VAR_DECL)
1576 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1579 If two declarations of the same function or object
1580 specify different linkage-specifications ..., the program
1581 is ill-formed.... Except for functions with C++ linkage,
1582 a function declaration without a linkage specification
1583 shall not precede the first linkage specification for
1584 that function. A function can be declared without a
1585 linkage specification after an explicit linkage
1586 specification has been seen; the linkage explicitly
1587 specified in the earlier declaration is not affected by
1588 such a function declaration.
1590 DR 563 raises the question why the restrictions on
1591 functions should not also apply to objects. Older
1592 versions of G++ silently ignore the linkage-specification
1600 which is clearly wrong. Therefore, we now treat objects
1602 if (current_lang_depth () == 0)
1604 /* There is no explicit linkage-specification, so we use
1605 the linkage from the previous declaration. */
1606 if (!DECL_LANG_SPECIFIC (newdecl))
1607 retrofit_lang_decl (newdecl);
1608 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1612 error ("previous declaration of %q+#D with %qL linkage",
1613 olddecl, DECL_LANGUAGE (olddecl));
1614 error ("conflicts with new declaration with %qL linkage",
1615 DECL_LANGUAGE (newdecl));
1619 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1621 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1623 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1624 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1627 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1628 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1630 for (; t1 && t1 != void_list_node;
1631 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1632 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1634 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1637 permerror (input_location, "default argument given for parameter %d of %q#D",
1639 permerror (input_location, "after previous specification in %q+#D", olddecl);
1643 error ("default argument given for parameter %d of %q#D",
1645 error ("after previous specification in %q+#D",
1652 /* Do not merge an implicit typedef with an explicit one. In:
1656 typedef class A A __attribute__ ((foo));
1658 the attribute should apply only to the typedef. */
1659 if (TREE_CODE (olddecl) == TYPE_DECL
1660 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1661 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1664 /* If new decl is `static' and an `extern' was seen previously,
1666 warn_extern_redeclared_static (newdecl, olddecl);
1668 if (!validate_constexpr_redeclaration (olddecl, newdecl))
1669 return error_mark_node;
1671 /* We have committed to returning 1 at this point. */
1672 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1674 /* Now that functions must hold information normally held
1675 by field decls, there is extra work to do so that
1676 declaration information does not get destroyed during
1678 if (DECL_VINDEX (olddecl))
1679 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1680 if (DECL_CONTEXT (olddecl))
1681 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1682 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1683 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1684 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1685 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1686 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1687 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1688 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1689 SET_OVERLOADED_OPERATOR_CODE
1690 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1691 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1693 /* Optionally warn about more than one declaration for the same
1694 name, but don't warn about a function declaration followed by a
1696 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1697 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1698 /* Don't warn about extern decl followed by definition. */
1699 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1700 /* Don't warn about friends, let add_friend take care of it. */
1701 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1703 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1704 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1707 if (DECL_DELETED_FN (newdecl))
1709 error ("deleted definition of %qD", newdecl);
1710 error ("after previous declaration %q+D", olddecl);
1712 DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
1715 /* Deal with C++: must preserve virtual function table size. */
1716 if (TREE_CODE (olddecl) == TYPE_DECL)
1718 tree newtype = TREE_TYPE (newdecl);
1719 tree oldtype = TREE_TYPE (olddecl);
1721 if (newtype != error_mark_node && oldtype != error_mark_node
1722 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1723 CLASSTYPE_FRIEND_CLASSES (newtype)
1724 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1726 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1729 /* Copy all the DECL_... slots specified in the new decl
1730 except for any that we copy here from the old type. */
1731 DECL_ATTRIBUTES (newdecl)
1732 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1734 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1738 old_result = DECL_TEMPLATE_RESULT (olddecl);
1739 new_result = DECL_TEMPLATE_RESULT (newdecl);
1740 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1741 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1742 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1743 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1745 DECL_ATTRIBUTES (old_result)
1746 = (*targetm.merge_decl_attributes) (old_result, new_result);
1748 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1750 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1751 && DECL_INITIAL (new_result))
1753 if (DECL_INITIAL (old_result))
1754 DECL_UNINLINABLE (old_result) = 1;
1756 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1757 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1758 DECL_NOT_REALLY_EXTERN (old_result)
1759 = DECL_NOT_REALLY_EXTERN (new_result);
1760 DECL_INTERFACE_KNOWN (old_result)
1761 = DECL_INTERFACE_KNOWN (new_result);
1762 DECL_DECLARED_INLINE_P (old_result)
1763 = DECL_DECLARED_INLINE_P (new_result);
1764 DECL_DISREGARD_INLINE_LIMITS (old_result)
1765 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1770 DECL_DECLARED_INLINE_P (old_result)
1771 |= DECL_DECLARED_INLINE_P (new_result);
1772 DECL_DISREGARD_INLINE_LIMITS (old_result)
1773 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1774 check_redeclaration_exception_specification (newdecl, olddecl);
1778 /* If the new declaration is a definition, update the file and
1779 line information on the declaration, and also make
1780 the old declaration the same definition. */
1781 if (DECL_INITIAL (new_result) != NULL_TREE)
1783 DECL_SOURCE_LOCATION (olddecl)
1784 = DECL_SOURCE_LOCATION (old_result)
1785 = DECL_SOURCE_LOCATION (newdecl);
1786 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1787 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1790 DECL_ARGUMENTS (old_result)
1791 = DECL_ARGUMENTS (new_result);
1792 for (parm = DECL_ARGUMENTS (old_result); parm;
1793 parm = DECL_CHAIN (parm))
1794 DECL_CONTEXT (parm) = old_result;
1803 /* Automatically handles default parameters. */
1804 tree oldtype = TREE_TYPE (olddecl);
1807 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1808 maybe_instantiate_noexcept (olddecl);
1810 /* Merge the data types specified in the two decls. */
1811 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1813 /* If merge_types produces a non-typedef type, just use the old type. */
1814 if (TREE_CODE (newdecl) == TYPE_DECL
1815 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1818 if (TREE_CODE (newdecl) == VAR_DECL)
1820 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1821 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1822 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1823 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1824 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1825 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1827 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1828 if (DECL_LANG_SPECIFIC (olddecl)
1829 && CP_DECL_THREADPRIVATE_P (olddecl))
1831 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1832 if (!DECL_LANG_SPECIFIC (newdecl))
1833 retrofit_lang_decl (newdecl);
1835 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1836 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1840 /* Do this after calling `merge_types' so that default
1841 parameters don't confuse us. */
1842 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1843 check_redeclaration_exception_specification (newdecl, olddecl);
1844 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1846 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1847 check_default_args (newdecl);
1849 /* Lay the type out, unless already done. */
1850 if (! same_type_p (newtype, oldtype)
1851 && TREE_TYPE (newdecl) != error_mark_node
1852 && !(processing_template_decl && uses_template_parms (newdecl)))
1853 layout_type (TREE_TYPE (newdecl));
1855 if ((TREE_CODE (newdecl) == VAR_DECL
1856 || TREE_CODE (newdecl) == PARM_DECL
1857 || TREE_CODE (newdecl) == RESULT_DECL
1858 || TREE_CODE (newdecl) == FIELD_DECL
1859 || TREE_CODE (newdecl) == TYPE_DECL)
1860 && !(processing_template_decl && uses_template_parms (newdecl)))
1861 layout_decl (newdecl, 0);
1863 /* Merge the type qualifiers. */
1864 if (TREE_READONLY (newdecl))
1865 TREE_READONLY (olddecl) = 1;
1866 if (TREE_THIS_VOLATILE (newdecl))
1867 TREE_THIS_VOLATILE (olddecl) = 1;
1868 if (TREE_NOTHROW (newdecl))
1869 TREE_NOTHROW (olddecl) = 1;
1871 /* Merge deprecatedness. */
1872 if (TREE_DEPRECATED (newdecl))
1873 TREE_DEPRECATED (olddecl) = 1;
1875 /* Preserve function specific target and optimization options */
1876 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1878 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1879 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1880 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1881 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1883 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1884 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1885 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1886 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1889 /* Merge the initialization information. */
1890 if (DECL_INITIAL (newdecl) == NULL_TREE
1891 && DECL_INITIAL (olddecl) != NULL_TREE)
1893 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1894 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1895 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1897 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1898 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1902 /* Merge the section attribute.
1903 We want to issue an error if the sections conflict but that must be
1904 done later in decl_attributes since we are called before attributes
1906 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1907 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1909 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1911 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1912 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1913 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1914 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1915 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1916 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1917 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1918 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1919 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1920 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1921 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1922 /* Keep the old RTL. */
1923 COPY_DECL_RTL (olddecl, newdecl);
1925 else if (TREE_CODE (newdecl) == VAR_DECL
1926 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1928 /* Keep the old RTL. We cannot keep the old RTL if the old
1929 declaration was for an incomplete object and the new
1930 declaration is not since many attributes of the RTL will
1932 COPY_DECL_RTL (olddecl, newdecl);
1935 /* If cannot merge, then use the new type and qualifiers,
1936 and don't preserve the old rtl. */
1939 /* Clean out any memory we had of the old declaration. */
1940 tree oldstatic = value_member (olddecl, static_aggregates);
1942 TREE_VALUE (oldstatic) = error_mark_node;
1944 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1945 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1946 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1947 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1950 /* Merge the storage class information. */
1951 merge_weak (newdecl, olddecl);
1953 if (DECL_ONE_ONLY (olddecl))
1954 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1956 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1957 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1958 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1959 if (! DECL_EXTERNAL (olddecl))
1960 DECL_EXTERNAL (newdecl) = 0;
1962 new_template_info = NULL_TREE;
1963 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1965 bool new_redefines_gnu_inline = false;
1967 if (new_defines_function
1968 && ((DECL_INTERFACE_KNOWN (olddecl)
1969 && TREE_CODE (olddecl) == FUNCTION_DECL)
1970 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1971 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1972 == FUNCTION_DECL))))
1976 if (TREE_CODE (fn) == TEMPLATE_DECL)
1977 fn = DECL_TEMPLATE_RESULT (olddecl);
1979 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1982 if (!new_redefines_gnu_inline)
1984 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1985 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1986 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1988 DECL_TEMPLATE_INSTANTIATED (newdecl)
1989 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1990 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1992 /* If the OLDDECL is an instantiation and/or specialization,
1993 then the NEWDECL must be too. But, it may not yet be marked
1994 as such if the caller has created NEWDECL, but has not yet
1995 figured out that it is a redeclaration. */
1996 if (!DECL_USE_TEMPLATE (newdecl))
1997 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1999 /* Don't really know how much of the language-specific
2000 values we should copy from old to new. */
2001 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
2002 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
2003 DECL_INITIALIZED_IN_CLASS_P (newdecl)
2004 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
2006 if (LANG_DECL_HAS_MIN (newdecl))
2008 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
2009 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
2010 if (DECL_TEMPLATE_INFO (newdecl))
2011 new_template_info = DECL_TEMPLATE_INFO (newdecl);
2012 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
2014 /* Only functions have these fields. */
2015 if (TREE_CODE (newdecl) == FUNCTION_DECL
2016 || DECL_FUNCTION_TEMPLATE_P (newdecl))
2018 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
2019 olddecl_friend = DECL_FRIEND_P (olddecl);
2020 hidden_friend = (DECL_ANTICIPATED (olddecl)
2021 && DECL_HIDDEN_FRIEND_P (olddecl)
2022 && newdecl_is_friend);
2023 DECL_BEFRIENDING_CLASSES (newdecl)
2024 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2025 DECL_BEFRIENDING_CLASSES (olddecl));
2026 /* DECL_THUNKS is only valid for virtual functions,
2027 otherwise it is a DECL_FRIEND_CONTEXT. */
2028 if (DECL_VIRTUAL_P (newdecl))
2029 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2031 /* Only variables have this field. */
2032 else if (TREE_CODE (newdecl) == VAR_DECL
2033 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2034 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2037 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2041 /* Merge parameter attributes. */
2042 tree oldarg, newarg;
2043 for (oldarg = DECL_ARGUMENTS(olddecl),
2044 newarg = DECL_ARGUMENTS(newdecl);
2046 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2047 DECL_ATTRIBUTES (newarg)
2048 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2049 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2052 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2053 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2055 /* If newdecl is not a specialization, then it is not a
2056 template-related function at all. And that means that we
2057 should have exited above, returning 0. */
2058 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2060 if (DECL_ODR_USED (olddecl))
2061 /* From [temp.expl.spec]:
2063 If a template, a member template or the member of a class
2064 template is explicitly specialized then that
2065 specialization shall be declared before the first use of
2066 that specialization that would cause an implicit
2067 instantiation to take place, in every translation unit in
2068 which such a use occurs. */
2069 error ("explicit specialization of %qD after first use",
2072 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2074 /* Don't propagate visibility from the template to the
2075 specialization here. We'll do that in determine_visibility if
2077 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2079 /* [temp.expl.spec/14] We don't inline explicit specialization
2080 just because the primary template says so. */
2082 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2083 the always_inline attribute. */
2084 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2085 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2087 if (DECL_DECLARED_INLINE_P (newdecl))
2088 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2090 DECL_ATTRIBUTES (newdecl)
2091 = remove_attribute ("always_inline",
2092 DECL_ATTRIBUTES (newdecl));
2095 else if (new_defines_function && DECL_INITIAL (olddecl))
2097 /* Never inline re-defined extern inline functions.
2098 FIXME: this could be better handled by keeping both
2099 function as separate declarations. */
2100 DECL_UNINLINABLE (newdecl) = 1;
2104 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2105 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2107 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2109 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2110 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2112 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2113 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2114 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2115 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2118 /* Preserve abstractness on cloned [cd]tors. */
2119 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2121 /* Update newdecl's parms to point at olddecl. */
2122 for (parm = DECL_ARGUMENTS (newdecl); parm;
2123 parm = DECL_CHAIN (parm))
2124 DECL_CONTEXT (parm) = olddecl;
2128 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2129 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2130 COPY_DECL_RTL (newdecl, olddecl);
2132 if (! types_match || new_defines_function)
2134 /* These need to be copied so that the names are available.
2135 Note that if the types do match, we'll preserve inline
2136 info and other bits, but if not, we won't. */
2137 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2138 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2140 if (new_defines_function)
2141 /* If defining a function declared with other language
2142 linkage, use the previously declared language linkage. */
2143 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2144 else if (types_match)
2146 /* If redeclaring a builtin function, and not a definition,
2147 it stays built in. */
2148 if (DECL_BUILT_IN (olddecl))
2150 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2151 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2152 /* If we're keeping the built-in definition, keep the rtl,
2153 regardless of declaration matches. */
2154 COPY_DECL_RTL (olddecl, newdecl);
2155 if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL)
2157 enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl);
2160 /* If a compatible prototype of these builtin functions
2161 is seen, assume the runtime implements it with the
2162 expected semantics. */
2163 case BUILT_IN_STPCPY:
2164 if (builtin_decl_explicit_p (fncode))
2165 set_builtin_decl_implicit_p (fncode, true);
2173 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2174 /* Don't clear out the arguments if we're just redeclaring a
2176 if (DECL_ARGUMENTS (olddecl))
2177 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2180 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2181 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2183 /* Now preserve various other info from the definition. */
2184 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2185 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2186 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2187 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2189 /* Warn about conflicting visibility specifications. */
2190 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2191 && DECL_VISIBILITY_SPECIFIED (newdecl)
2192 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2194 warning_at (input_location, OPT_Wattributes,
2195 "%q+D: visibility attribute ignored because it", newdecl);
2196 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2197 "conflicts with previous declaration here");
2199 /* Choose the declaration which specified visibility. */
2200 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2202 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2203 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2205 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2206 so keep this behavior. */
2207 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2209 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2210 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2212 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2213 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2214 if (TREE_CODE (newdecl) == FIELD_DECL)
2215 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2217 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2218 with that from NEWDECL below. */
2219 if (DECL_LANG_SPECIFIC (olddecl))
2221 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2222 != DECL_LANG_SPECIFIC (newdecl));
2223 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2226 /* Merge the USED information. */
2227 if (TREE_USED (olddecl))
2228 TREE_USED (newdecl) = 1;
2229 else if (TREE_USED (newdecl))
2230 TREE_USED (olddecl) = 1;
2231 if (TREE_CODE (newdecl) == VAR_DECL)
2233 if (DECL_READ_P (olddecl))
2234 DECL_READ_P (newdecl) = 1;
2235 else if (DECL_READ_P (newdecl))
2236 DECL_READ_P (olddecl) = 1;
2238 if (DECL_PRESERVE_P (olddecl))
2239 DECL_PRESERVE_P (newdecl) = 1;
2240 else if (DECL_PRESERVE_P (newdecl))
2241 DECL_PRESERVE_P (olddecl) = 1;
2243 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2247 function_size = sizeof (struct tree_decl_common);
2249 memcpy ((char *) olddecl + sizeof (struct tree_common),
2250 (char *) newdecl + sizeof (struct tree_common),
2251 function_size - sizeof (struct tree_common));
2253 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2254 (char *) newdecl + sizeof (struct tree_decl_common),
2255 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2256 if (new_template_info)
2257 /* If newdecl is a template instantiation, it is possible that
2258 the following sequence of events has occurred:
2260 o A friend function was declared in a class template. The
2261 class template was instantiated.
2263 o The instantiation of the friend declaration was
2264 recorded on the instantiation list, and is newdecl.
2266 o Later, however, instantiate_class_template called pushdecl
2267 on the newdecl to perform name injection. But, pushdecl in
2268 turn called duplicate_decls when it discovered that another
2269 declaration of a global function with the same name already
2272 o Here, in duplicate_decls, we decided to clobber newdecl.
2274 If we're going to do that, we'd better make sure that
2275 olddecl, and not newdecl, is on the list of
2276 instantiations so that if we try to do the instantiation
2277 again we won't get the clobbered declaration. */
2278 reregister_specialization (newdecl,
2284 size_t size = tree_code_size (TREE_CODE (olddecl));
2285 memcpy ((char *) olddecl + sizeof (struct tree_common),
2286 (char *) newdecl + sizeof (struct tree_common),
2287 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2288 switch (TREE_CODE (olddecl))
2298 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2299 (char *) newdecl + sizeof (struct tree_decl_common),
2300 size - sizeof (struct tree_decl_common)
2301 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2305 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2306 (char *) newdecl + sizeof (struct tree_decl_common),
2307 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2308 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2312 DECL_UID (olddecl) = olddecl_uid;
2314 DECL_FRIEND_P (olddecl) = 1;
2317 DECL_ANTICIPATED (olddecl) = 1;
2318 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2321 /* NEWDECL contains the merged attribute lists.
2322 Update OLDDECL to be the same. */
2323 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2325 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2326 so that encode_section_info has a chance to look at the new decl
2327 flags and attributes. */
2328 if (DECL_RTL_SET_P (olddecl)
2329 && (TREE_CODE (olddecl) == FUNCTION_DECL
2330 || (TREE_CODE (olddecl) == VAR_DECL
2331 && TREE_STATIC (olddecl))))
2332 make_decl_rtl (olddecl);
2334 /* The NEWDECL will no longer be needed. Because every out-of-class
2335 declaration of a member results in a call to duplicate_decls,
2336 freeing these nodes represents in a significant savings. */
2342 /* Return zero if the declaration NEWDECL is valid
2343 when the declaration OLDDECL (assumed to be for the same name)
2344 has already been seen.
2345 Otherwise return an error message format string with a %s
2346 where the identifier should go. */
2349 redeclaration_error_message (tree newdecl, tree olddecl)
2351 if (TREE_CODE (newdecl) == TYPE_DECL)
2353 /* Because C++ can put things into name space for free,
2354 constructs like "typedef struct foo { ... } foo"
2355 would look like an erroneous redeclaration. */
2356 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2359 return G_("redefinition of %q#D");
2361 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2363 /* If this is a pure function, its olddecl will actually be
2364 the original initialization to `0' (which we force to call
2365 abort()). Don't complain about redefinition in this case. */
2366 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2367 && DECL_INITIAL (olddecl) == NULL_TREE)
2370 /* If both functions come from different namespaces, this is not
2371 a redeclaration - this is a conflict with a used function. */
2372 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2373 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2374 && ! decls_match (olddecl, newdecl))
2375 return G_("%qD conflicts with used function");
2377 /* We'll complain about linkage mismatches in
2378 warn_extern_redeclared_static. */
2380 /* Defining the same name twice is no good. */
2381 if (DECL_INITIAL (olddecl) != NULL_TREE
2382 && DECL_INITIAL (newdecl) != NULL_TREE)
2384 if (DECL_NAME (olddecl) == NULL_TREE)
2385 return G_("%q#D not declared in class");
2386 else if (!GNU_INLINE_P (olddecl)
2387 || GNU_INLINE_P (newdecl))
2388 return G_("redefinition of %q#D");
2391 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2393 bool olda = GNU_INLINE_P (olddecl);
2394 bool newa = GNU_INLINE_P (newdecl);
2399 return G_("%q+D redeclared inline with "
2400 "%<gnu_inline%> attribute");
2402 return G_("%q+D redeclared inline without "
2403 "%<gnu_inline%> attribute");
2409 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2413 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2415 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2416 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2417 return G_("redefinition of %q#D");
2421 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2422 || (DECL_TEMPLATE_RESULT (newdecl)
2423 == DECL_TEMPLATE_RESULT (olddecl)))
2426 nt = DECL_TEMPLATE_RESULT (newdecl);
2427 if (DECL_TEMPLATE_INFO (nt))
2428 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2429 ot = DECL_TEMPLATE_RESULT (olddecl);
2430 if (DECL_TEMPLATE_INFO (ot))
2431 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2432 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2433 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2434 return G_("redefinition of %q#D");
2436 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2438 bool olda = GNU_INLINE_P (ot);
2439 bool newa = GNU_INLINE_P (nt);
2444 return G_("%q+D redeclared inline with "
2445 "%<gnu_inline%> attribute");
2447 return G_("%q+D redeclared inline without "
2448 "%<gnu_inline%> attribute");
2452 /* Core issue #226 (C++0x):
2454 If a friend function template declaration specifies a
2455 default template-argument, that declaration shall be a
2456 definition and shall be the only declaration of the
2457 function template in the translation unit. */
2458 if ((cxx_dialect != cxx98)
2459 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2460 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2461 /*is_primary=*/1, /*is_partial=*/0,
2462 /*is_friend_decl=*/2))
2463 return G_("redeclaration of friend %q#D "
2464 "may not have default template arguments");
2468 else if (TREE_CODE (newdecl) == VAR_DECL
2469 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2470 && (! DECL_LANG_SPECIFIC (olddecl)
2471 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2472 || DECL_THREAD_LOCAL_P (newdecl)))
2474 /* Only variables can be thread-local, and all declarations must
2475 agree on this property. */
2476 if (DECL_THREAD_LOCAL_P (newdecl))
2477 return G_("thread-local declaration of %q#D follows "
2478 "non-thread-local declaration");
2480 return G_("non-thread-local declaration of %q#D follows "
2481 "thread-local declaration");
2483 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2485 /* The objects have been declared at namespace scope. If either
2486 is a member of an anonymous union, then this is an invalid
2487 redeclaration. For example:
2493 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2494 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2495 return G_("redeclaration of %q#D");
2496 /* If at least one declaration is a reference, there is no
2497 conflict. For example:
2503 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2505 /* Reject two definitions. */
2506 return G_("redefinition of %q#D");
2510 /* Objects declared with block scope: */
2511 /* Reject two definitions, and reject a definition
2512 together with an external reference. */
2513 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2514 return G_("redeclaration of %q#D");
2519 /* Hash and equality functions for the named_label table. */
2522 named_label_entry_hash (const void *data)
2524 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2525 return DECL_UID (ent->label_decl);
2529 named_label_entry_eq (const void *a, const void *b)
2531 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2532 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2533 return ent_a->label_decl == ent_b->label_decl;
2536 /* Create a new label, named ID. */
2539 make_label_decl (tree id, int local_p)
2541 struct named_label_entry *ent;
2545 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2547 DECL_CONTEXT (decl) = current_function_decl;
2548 DECL_MODE (decl) = VOIDmode;
2549 C_DECLARED_LABEL_FLAG (decl) = local_p;
2551 /* Say where one reference is to the label, for the sake of the
2552 error if it is not defined. */
2553 DECL_SOURCE_LOCATION (decl) = input_location;
2555 /* Record the fact that this identifier is bound to this label. */
2556 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2558 /* Create the label htab for the function on demand. */
2560 named_labels = htab_create_ggc (13, named_label_entry_hash,
2561 named_label_entry_eq, NULL);
2563 /* Record this label on the list of labels used in this function.
2564 We do this before calling make_label_decl so that we get the
2565 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2566 ent = ggc_alloc_cleared_named_label_entry ();
2567 ent->label_decl = decl;
2569 slot = htab_find_slot (named_labels, ent, INSERT);
2570 gcc_assert (*slot == NULL);
2576 /* Look for a label named ID in the current function. If one cannot
2577 be found, create one. (We keep track of used, but undefined,
2578 labels, and complain about them at the end of a function.) */
2581 lookup_label_1 (tree id)
2585 /* You can't use labels at global scope. */
2586 if (current_function_decl == NULL_TREE)
2588 error ("label %qE referenced outside of any function", id);
2592 /* See if we've already got this label. */
2593 decl = IDENTIFIER_LABEL_VALUE (id);
2594 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2597 decl = make_label_decl (id, /*local_p=*/0);
2601 /* Wrapper for lookup_label_1. */
2604 lookup_label (tree id)
2607 bool subtime = timevar_cond_start (TV_NAME_LOOKUP);
2608 ret = lookup_label_1 (id);
2609 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
2613 /* Declare a local label named ID. */
2616 declare_local_label (tree id)
2619 cp_label_binding *bind;
2621 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2622 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2623 bind = VEC_safe_push (cp_label_binding, gc,
2624 current_binding_level->shadowed_labels, NULL);
2625 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2627 decl = make_label_decl (id, /*local_p=*/1);
2633 /* Returns nonzero if it is ill-formed to jump past the declaration of
2634 DECL. Returns 2 if it's also a real problem. */
2637 decl_jump_unsafe (tree decl)
2639 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2640 with automatic storage duration is not in scope to a point where it is
2641 in scope is ill-formed unless the variable has scalar type, class type
2642 with a trivial default constructor and a trivial destructor, a
2643 cv-qualified version of one of these types, or an array of one of the
2644 preceding types and is declared without an initializer (8.5). */
2645 tree type = TREE_TYPE (decl);
2647 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2648 || type == error_mark_node)
2651 type = strip_array_types (type);
2653 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2654 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2657 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2663 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2666 identify_goto (tree decl, const location_t *locus)
2669 permerror (input_location, "jump to label %qD", decl);
2671 permerror (input_location, "jump to case label");
2673 permerror (*locus, " from here");
2676 /* Check that a single previously seen jump to a newly defined label
2677 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2678 the jump context; NAMES are the names in scope in LEVEL at the jump
2679 context; LOCUS is the source position of the jump or 0. Returns
2680 true if all is well. */
2683 check_previous_goto_1 (tree decl, cp_binding_level* level, tree names,
2684 bool exited_omp, const location_t *locus)
2686 cp_binding_level *b;
2687 bool identified = false, saw_eh = false, saw_omp = false;
2691 identify_goto (decl, locus);
2692 error (" exits OpenMP structured block");
2693 identified = saw_omp = true;
2696 for (b = current_binding_level; b ; b = b->level_chain)
2698 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2700 for (new_decls = b->names; new_decls != old_decls;
2701 new_decls = (DECL_P (new_decls) ? DECL_CHAIN (new_decls)
2702 : TREE_CHAIN (new_decls)))
2704 int problem = decl_jump_unsafe (new_decls);
2710 identify_goto (decl, locus);
2714 error (" crosses initialization of %q+#D", new_decls);
2716 permerror (input_location, " enters scope of %q+#D which has "
2717 "non-trivial destructor", new_decls);
2722 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2726 identify_goto (decl, locus);
2729 if (b->kind == sk_try)
2730 error (" enters try block");
2732 error (" enters catch block");
2735 if (b->kind == sk_omp && !saw_omp)
2739 identify_goto (decl, locus);
2742 error (" enters OpenMP structured block");
2751 check_previous_goto (tree decl, struct named_label_use_entry *use)
2753 check_previous_goto_1 (decl, use->binding_level,
2754 use->names_in_scope, use->in_omp_scope,
2755 &use->o_goto_locus);
2759 check_switch_goto (cp_binding_level* level)
2761 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2764 /* Check that a new jump to a label DECL is OK. Called by
2765 finish_goto_stmt. */
2768 check_goto (tree decl)
2770 struct named_label_entry *ent, dummy;
2771 bool saw_catch = false, identified = false;
2775 /* We can't know where a computed goto is jumping.
2776 So we assume that it's OK. */
2777 if (TREE_CODE (decl) != LABEL_DECL)
2780 /* We didn't record any information about this label when we created it,
2781 and there's not much point since it's trivial to analyze as a return. */
2782 if (decl == cdtor_label)
2785 dummy.label_decl = decl;
2786 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2787 gcc_assert (ent != NULL);
2789 /* If the label hasn't been defined yet, defer checking. */
2790 if (! DECL_INITIAL (decl))
2792 struct named_label_use_entry *new_use;
2794 /* Don't bother creating another use if the last goto had the
2795 same data, and will therefore create the same set of errors. */
2797 && ent->uses->names_in_scope == current_binding_level->names)
2800 new_use = ggc_alloc_named_label_use_entry ();
2801 new_use->binding_level = current_binding_level;
2802 new_use->names_in_scope = current_binding_level->names;
2803 new_use->o_goto_locus = input_location;
2804 new_use->in_omp_scope = false;
2806 new_use->next = ent->uses;
2807 ent->uses = new_use;
2811 if (ent->in_try_scope || ent->in_catch_scope
2812 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2814 permerror (input_location, "jump to label %q+D", decl);
2815 permerror (input_location, " from here");
2819 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2821 int u = decl_jump_unsafe (bad);
2823 if (u > 1 && DECL_ARTIFICIAL (bad))
2825 /* Can't skip init of __exception_info. */
2826 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2830 error (" skips initialization of %q+#D", bad);
2832 permerror (input_location, " enters scope of %q+#D which has "
2833 "non-trivial destructor", bad);
2836 if (ent->in_try_scope)
2837 error (" enters try block");
2838 else if (ent->in_catch_scope && !saw_catch)
2839 error (" enters catch block");
2841 if (ent->in_omp_scope)
2842 error (" enters OpenMP structured block");
2843 else if (flag_openmp)
2845 cp_binding_level *b;
2846 for (b = current_binding_level; b ; b = b->level_chain)
2848 if (b == ent->binding_level)
2850 if (b->kind == sk_omp)
2854 permerror (input_location, "jump to label %q+D", decl);
2855 permerror (input_location, " from here");
2858 error (" exits OpenMP structured block");
2865 /* Check that a return is ok wrt OpenMP structured blocks.
2866 Called by finish_return_stmt. Returns true if all is well. */
2869 check_omp_return (void)
2871 cp_binding_level *b;
2872 for (b = current_binding_level; b ; b = b->level_chain)
2873 if (b->kind == sk_omp)
2875 error ("invalid exit from OpenMP structured block");
2878 else if (b->kind == sk_function_parms)
2883 /* Define a label, specifying the location in the source file.
2884 Return the LABEL_DECL node for the label. */
2887 define_label_1 (location_t location, tree name)
2889 struct named_label_entry *ent, dummy;
2890 cp_binding_level *p;
2893 decl = lookup_label (name);
2895 dummy.label_decl = decl;
2896 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2897 gcc_assert (ent != NULL);
2899 /* After labels, make any new cleanups in the function go into their
2900 own new (temporary) binding contour. */
2901 for (p = current_binding_level;
2902 p->kind != sk_function_parms;
2904 p->more_cleanups_ok = 0;
2906 if (name == get_identifier ("wchar_t"))
2907 permerror (input_location, "label named wchar_t");
2909 if (DECL_INITIAL (decl) != NULL_TREE)
2911 error ("duplicate label %qD", decl);
2912 return error_mark_node;
2916 struct named_label_use_entry *use;
2918 /* Mark label as having been defined. */
2919 DECL_INITIAL (decl) = error_mark_node;
2920 /* Say where in the source. */
2921 DECL_SOURCE_LOCATION (decl) = location;
2923 ent->binding_level = current_binding_level;
2924 ent->names_in_scope = current_binding_level->names;
2926 for (use = ent->uses; use ; use = use->next)
2927 check_previous_goto (decl, use);
2934 /* Wrapper for define_label_1. */
2937 define_label (location_t location, tree name)
2940 timevar_start (TV_NAME_LOOKUP);
2941 ret = define_label_1 (location, name);
2942 timevar_stop (TV_NAME_LOOKUP);
2949 cp_binding_level *level;
2950 struct cp_switch *next;
2951 /* The SWITCH_STMT being built. */
2953 /* A splay-tree mapping the low element of a case range to the high
2954 element, or NULL_TREE if there is no high element. Used to
2955 determine whether or not a new case label duplicates an old case
2956 label. We need a tree, rather than simply a hash table, because
2957 of the GNU case range extension. */
2961 /* A stack of the currently active switch statements. The innermost
2962 switch statement is on the top of the stack. There is no need to
2963 mark the stack for garbage collection because it is only active
2964 during the processing of the body of a function, and we never
2965 collect at that point. */
2967 static struct cp_switch *switch_stack;
2969 /* Called right after a switch-statement condition is parsed.
2970 SWITCH_STMT is the switch statement being parsed. */
2973 push_switch (tree switch_stmt)
2975 struct cp_switch *p = XNEW (struct cp_switch);
2976 p->level = current_binding_level;
2977 p->next = switch_stack;
2978 p->switch_stmt = switch_stmt;
2979 p->cases = splay_tree_new (case_compare, NULL, NULL);
2986 struct cp_switch *cs = switch_stack;
2987 location_t switch_location;
2989 /* Emit warnings as needed. */
2990 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2991 if (!processing_template_decl)
2992 c_do_switch_warnings (cs->cases, switch_location,
2993 SWITCH_STMT_TYPE (cs->switch_stmt),
2994 SWITCH_STMT_COND (cs->switch_stmt));
2996 splay_tree_delete (cs->cases);
2997 switch_stack = switch_stack->next;
3001 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3002 condition. Note that if TYPE and VALUE are already integral we don't
3003 really do the conversion because the language-independent
3004 warning/optimization code will work better that way. */
3007 case_conversion (tree type, tree value)
3009 if (value == NULL_TREE)
3012 if (cxx_dialect >= cxx0x
3013 && (SCOPED_ENUM_P (type)
3014 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value))))
3016 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
3017 type = type_promotes_to (type);
3018 value = perform_implicit_conversion (type, value, tf_warning_or_error);
3020 return cxx_constant_value (value);
3023 /* Note that we've seen a definition of a case label, and complain if this
3024 is a bad place for one. */
3027 finish_case_label (location_t loc, tree low_value, tree high_value)
3030 cp_binding_level *p;
3033 if (processing_template_decl)
3037 /* For templates, just add the case label; we'll do semantic
3038 analysis at instantiation-time. */
3039 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
3040 return add_stmt (build_case_label (low_value, high_value, label));
3043 /* Find the condition on which this switch statement depends. */
3044 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
3045 if (cond && TREE_CODE (cond) == TREE_LIST)
3046 cond = TREE_VALUE (cond);
3048 if (!check_switch_goto (switch_stack->level))
3049 return error_mark_node;
3051 type = SWITCH_STMT_TYPE (switch_stack->switch_stmt);
3053 low_value = case_conversion (type, low_value);
3054 high_value = case_conversion (type, high_value);
3056 r = c_add_case_label (loc, switch_stack->cases, cond, type,
3057 low_value, high_value);
3059 /* After labels, make any new cleanups in the function go into their
3060 own new (temporary) binding contour. */
3061 for (p = current_binding_level;
3062 p->kind != sk_function_parms;
3064 p->more_cleanups_ok = 0;
3069 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3072 typename_hash (const void* k)
3075 const_tree const t = (const_tree) k;
3077 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
3078 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
3083 typedef struct typename_info {
3091 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3092 really of type `typename_info*' */
3095 typename_compare (const void * k1, const void * k2)
3097 const_tree const t1 = (const_tree) k1;
3098 const typename_info *const t2 = (const typename_info *) k2;
3100 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3101 && TYPE_CONTEXT (t1) == t2->scope
3102 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3103 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3104 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3107 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3108 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3110 Returns the new TYPENAME_TYPE. */
3112 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3115 build_typename_type (tree context, tree name, tree fullname,
3116 enum tag_types tag_type)
3124 if (typename_htab == NULL)
3125 typename_htab = htab_create_ggc (61, &typename_hash,
3126 &typename_compare, NULL);
3128 ti.scope = FROB_CONTEXT (context);
3130 ti.template_id = fullname;
3131 ti.enum_p = tag_type == enum_type;
3132 ti.class_p = (tag_type == class_type
3133 || tag_type == record_type
3134 || tag_type == union_type);
3135 hash = (htab_hash_pointer (ti.scope)
3136 ^ htab_hash_pointer (ti.name));
3138 /* See if we already have this type. */
3139 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3144 /* Build the TYPENAME_TYPE. */
3145 t = cxx_make_type (TYPENAME_TYPE);
3146 TYPE_CONTEXT (t) = ti.scope;
3147 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3148 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3149 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3151 /* Build the corresponding TYPE_DECL. */
3152 d = build_decl (input_location, TYPE_DECL, name, t);
3153 TYPE_NAME (TREE_TYPE (d)) = d;
3154 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3155 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3156 DECL_ARTIFICIAL (d) = 1;
3158 /* Store it in the hash table. */
3161 /* TYPENAME_TYPEs must always be compared structurally, because
3162 they may or may not resolve down to another type depending on
3163 the currently open classes. */
3164 SET_TYPE_STRUCTURAL_EQUALITY (t);
3170 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3171 provided to name the type. Returns an appropriate type, unless an
3172 error occurs, in which case error_mark_node is returned. If we
3173 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3174 return that, rather than the _TYPE it corresponds to, in other
3175 cases we look through the type decl. If TF_ERROR is set, complain
3176 about errors, otherwise be quiet. */
3179 make_typename_type (tree context, tree name, enum tag_types tag_type,
3180 tsubst_flags_t complain)
3186 if (name == error_mark_node
3187 || context == NULL_TREE
3188 || context == error_mark_node)
3189 return error_mark_node;
3193 if (!(TYPE_LANG_SPECIFIC (name)
3194 && (CLASSTYPE_IS_TEMPLATE (name)
3195 || CLASSTYPE_USE_TEMPLATE (name))))
3196 name = TYPE_IDENTIFIER (name);
3198 /* Create a TEMPLATE_ID_EXPR for the type. */
3199 name = build_nt (TEMPLATE_ID_EXPR,
3200 CLASSTYPE_TI_TEMPLATE (name),
3201 CLASSTYPE_TI_ARGS (name));
3203 else if (TREE_CODE (name) == TYPE_DECL)
3204 name = DECL_NAME (name);
3208 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3210 name = TREE_OPERAND (name, 0);
3211 if (TREE_CODE (name) == TEMPLATE_DECL)
3212 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3213 else if (TREE_CODE (name) == OVERLOAD)
3215 error ("%qD is not a type", name);
3216 return error_mark_node;
3219 if (TREE_CODE (name) == TEMPLATE_DECL)
3221 error ("%qD used without template parameters", name);
3222 return error_mark_node;
3224 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3225 gcc_assert (TYPE_P (context));
3227 if (!MAYBE_CLASS_TYPE_P (context))
3229 if (complain & tf_error)
3230 error ("%q#T is not a class", context);
3231 return error_mark_node;
3234 /* When the CONTEXT is a dependent type, NAME could refer to a
3235 dependent base class of CONTEXT. But look inside it anyway
3236 if CONTEXT is a currently open scope, in case it refers to a
3237 member of the current instantiation or a non-dependent base;
3238 lookup will stop when we hit a dependent base. */
3239 if (!dependent_scope_p (context))
3240 /* We should only set WANT_TYPE when we're a nested typename type.
3241 Then we can give better diagnostics if we find a non-type. */
3242 t = lookup_field (context, name, 2, /*want_type=*/true);
3246 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3247 return build_typename_type (context, name, fullname, tag_type);
3249 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3253 if (complain & tf_error)
3254 error (want_template ? G_("no class template named %q#T in %q#T")
3255 : G_("no type named %q#T in %q#T"), name, context);
3256 return error_mark_node;
3259 /* Pull out the template from an injected-class-name (or multiple). */
3261 t = maybe_get_template_decl_from_type_decl (t);
3263 if (TREE_CODE (t) == TREE_LIST)
3265 if (complain & tf_error)
3267 error ("lookup of %qT in %qT is ambiguous", name, context);
3268 print_candidates (t);
3270 return error_mark_node;
3273 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3275 if (complain & tf_error)
3276 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3278 return error_mark_node;
3280 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3282 if (complain & tf_error)
3283 error ("%<typename %T::%D%> names %q#T, which is not a type",
3285 return error_mark_node;
3288 if (complain & tf_error)
3289 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3291 /* If we are currently parsing a template and if T is a typedef accessed
3292 through CONTEXT then we need to remember and check access of T at
3293 template instantiation time. */
3294 add_typedef_to_current_template_for_access_check (t, context, input_location);
3297 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3299 /*entering_scope=*/0,
3300 tf_warning_or_error | tf_user);
3302 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3308 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3309 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3310 in which case error_mark_node is returned.
3312 If PARM_LIST is non-NULL, also make sure that the template parameter
3313 list of TEMPLATE_DECL matches.
3315 If COMPLAIN zero, don't complain about any errors that occur. */
3318 make_unbound_class_template (tree context, tree name, tree parm_list,
3319 tsubst_flags_t complain)
3325 name = TYPE_IDENTIFIER (name);
3326 else if (DECL_P (name))
3327 name = DECL_NAME (name);
3328 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3330 if (!dependent_type_p (context)
3331 || currently_open_class (context))
3333 tree tmpl = NULL_TREE;
3335 if (MAYBE_CLASS_TYPE_P (context))
3336 tmpl = lookup_field (context, name, 0, false);
3338 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3339 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3341 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3343 if (complain & tf_error)
3344 error ("no class template named %q#T in %q#T", name, context);
3345 return error_mark_node;
3349 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3351 if (complain & tf_error)
3353 error ("template parameters do not match template");
3354 error ("%q+D declared here", tmpl);
3356 return error_mark_node;
3359 if (complain & tf_error)
3360 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3365 /* Build the UNBOUND_CLASS_TEMPLATE. */
3366 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3367 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3368 TREE_TYPE (t) = NULL_TREE;
3369 SET_TYPE_STRUCTURAL_EQUALITY (t);
3371 /* Build the corresponding TEMPLATE_DECL. */
3372 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3373 TYPE_NAME (TREE_TYPE (d)) = d;
3374 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3375 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3376 DECL_ARTIFICIAL (d) = 1;
3377 DECL_TEMPLATE_PARMS (d) = parm_list;
3384 /* Push the declarations of builtin types into the namespace.
3385 RID_INDEX is the index of the builtin type in the array
3386 RID_POINTERS. NAME is the name used when looking up the builtin
3387 type. TYPE is the _TYPE node for the builtin type. */
3390 record_builtin_type (enum rid rid_index,
3394 tree rname = NULL_TREE, tname = NULL_TREE;
3395 tree tdecl = NULL_TREE;
3397 if ((int) rid_index < (int) RID_MAX)
3398 rname = ridpointers[(int) rid_index];
3400 tname = get_identifier (name);
3402 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3403 eliminated. Built-in types should not be looked up name; their
3404 names are keywords that the parser can recognize. However, there
3405 is code in c-common.c that uses identifier_global_value to look
3406 up built-in types by name. */
3409 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3410 DECL_ARTIFICIAL (tdecl) = 1;
3411 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3417 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3418 DECL_ARTIFICIAL (tdecl) = 1;
3420 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3423 if (!TYPE_NAME (type))
3424 TYPE_NAME (type) = tdecl;
3427 debug_hooks->type_decl (tdecl, 0);
3430 /* Record one of the standard Java types.
3431 * Declare it as having the given NAME.
3432 * If SIZE > 0, it is the size of one of the integral types;
3433 * otherwise it is the negative of the size of one of the other types. */
3436 record_builtin_java_type (const char* name, int size)
3441 type = build_nonstandard_integer_type (size, 0);
3442 type = build_distinct_type_copy (type);
3444 else if (size > -32)
3447 /* "__java_char" or ""__java_boolean". */
3448 type = build_nonstandard_integer_type (-size, 1);
3449 type = build_distinct_type_copy (type);
3450 /* Get the signed type cached and attached to the unsigned type,
3451 so it doesn't get garbage-collected at "random" times,
3452 causing potential codegen differences out of different UIDs
3453 and different alias set numbers. */
3454 stype = build_nonstandard_integer_type (-size, 0);
3455 stype = build_distinct_type_copy (stype);
3456 TREE_CHAIN (type) = stype;
3457 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3460 { /* "__java_float" or ""__java_double". */
3461 type = make_node (REAL_TYPE);
3462 TYPE_PRECISION (type) = - size;
3465 record_builtin_type (RID_MAX, name, type);
3466 decl = TYPE_NAME (type);
3468 /* Suppress generate debug symbol entries for these types,
3469 since for normal C++ they are just clutter.
3470 However, push_lang_context undoes this if extern "Java" is seen. */
3471 DECL_IGNORED_P (decl) = 1;
3473 TYPE_FOR_JAVA (type) = 1;
3477 /* Push a type into the namespace so that the back ends ignore it. */
3480 record_unknown_type (tree type, const char* name)
3482 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3483 TYPE_DECL, get_identifier (name), type));
3484 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3485 DECL_IGNORED_P (decl) = 1;
3486 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3487 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3488 TYPE_ALIGN (type) = 1;
3489 TYPE_USER_ALIGN (type) = 0;
3490 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3493 /* A string for which we should create an IDENTIFIER_NODE at
3496 typedef struct predefined_identifier
3498 /* The name of the identifier. */
3499 const char *const name;
3500 /* The place where the IDENTIFIER_NODE should be stored. */
3502 /* Nonzero if this is the name of a constructor or destructor. */
3503 const int ctor_or_dtor_p;
3504 } predefined_identifier;
3506 /* Create all the predefined identifiers. */
3509 initialize_predefined_identifiers (void)
3511 const predefined_identifier *pid;
3513 /* A table of identifiers to create at startup. */
3514 static const predefined_identifier predefined_identifiers[] = {
3515 { "C++", &lang_name_cplusplus, 0 },
3516 { "C", &lang_name_c, 0 },
3517 { "Java", &lang_name_java, 0 },
3518 /* Some of these names have a trailing space so that it is
3519 impossible for them to conflict with names written by users. */
3520 { "__ct ", &ctor_identifier, 1 },
3521 { "__base_ctor ", &base_ctor_identifier, 1 },
3522 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3523 { "__dt ", &dtor_identifier, 1 },
3524 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3525 { "__base_dtor ", &base_dtor_identifier, 1 },
3526 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3527 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3528 { "nelts", &nelts_identifier, 0 },
3529 { THIS_NAME, &this_identifier, 0 },
3530 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3531 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3532 { "_vptr", &vptr_identifier, 0 },
3533 { "__vtt_parm", &vtt_parm_identifier, 0 },
3534 { "::", &global_scope_name, 0 },
3535 { "std", &std_identifier, 0 },
3539 for (pid = predefined_identifiers; pid->name; ++pid)
3541 *pid->node = get_identifier (pid->name);
3542 if (pid->ctor_or_dtor_p)
3543 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3547 /* Create the predefined scalar types of C,
3548 and some nodes representing standard constants (0, 1, (void *)0).
3549 Initialize the global binding level.
3550 Make definitions for built-in primitive functions. */
3553 cxx_init_decl_processing (void)
3556 tree void_ftype_ptr;
3558 /* Create all the identifiers we need. */
3559 initialize_predefined_identifiers ();
3561 /* Create the global variables. */
3562 push_to_top_level ();
3564 current_function_decl = NULL_TREE;
3565 current_binding_level = NULL;
3566 /* Enter the global namespace. */
3567 gcc_assert (global_namespace == NULL_TREE);
3568 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3570 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3571 TREE_PUBLIC (global_namespace) = 1;
3572 begin_scope (sk_namespace, global_namespace);
3574 if (flag_visibility_ms_compat)
3575 default_visibility = VISIBILITY_HIDDEN;
3578 current_lang_name = lang_name_c;
3580 /* Create the `std' namespace. */
3581 push_namespace (std_identifier);
3582 std_node = current_namespace;
3585 c_common_nodes_and_builtins ();
3587 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3588 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3589 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3590 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3591 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3592 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3593 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3594 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3596 integer_two_node = build_int_cst (NULL_TREE, 2);
3598 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3599 truthvalue_type_node = boolean_type_node;
3600 truthvalue_false_node = boolean_false_node;
3601 truthvalue_true_node = boolean_true_node;
3603 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3604 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3605 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3608 record_builtin_type (RID_MAX, NULL, string_type_node);
3611 delta_type_node = ptrdiff_type_node;
3612 vtable_index_type = ptrdiff_type_node;
3614 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3615 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3616 void_ftype_ptr = build_function_type_list (void_type_node,
3617 ptr_type_node, NULL_TREE);
3619 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3621 /* C++ extensions */
3623 unknown_type_node = make_node (LANG_TYPE);
3624 record_unknown_type (unknown_type_node, "unknown type");
3626 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3627 TREE_TYPE (unknown_type_node) = unknown_type_node;
3629 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3631 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3632 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3634 init_list_type_node = make_node (LANG_TYPE);
3635 record_unknown_type (init_list_type_node, "init list");
3637 dependent_lambda_return_type_node = make_node (LANG_TYPE);
3638 record_unknown_type (dependent_lambda_return_type_node,
3639 "undeduced lambda return type");
3642 /* Make sure we get a unique function type, so we can give
3643 its pointer type a name. (This wins for gdb.) */
3644 tree vfunc_type = make_node (FUNCTION_TYPE);
3645 TREE_TYPE (vfunc_type) = integer_type_node;
3646 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3647 layout_type (vfunc_type);
3649 vtable_entry_type = build_pointer_type (vfunc_type);
3651 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3654 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3655 layout_type (vtbl_type_node);
3656 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3657 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3658 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3659 layout_type (vtbl_ptr_type_node);
3660 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3662 push_namespace (get_identifier ("__cxxabiv1"));
3663 abi_node = current_namespace;
3666 global_type_node = make_node (LANG_TYPE);
3667 record_unknown_type (global_type_node, "global type");
3670 current_lang_name = lang_name_cplusplus;
3673 tree newattrs, extvisattr;
3674 tree newtype, deltype;
3675 tree ptr_ftype_sizetype;
3679 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3680 if (cxx_dialect == cxx98)
3683 tree bad_alloc_type_node;
3684 tree bad_alloc_decl;
3686 push_namespace (std_identifier);
3687 bad_alloc_id = get_identifier ("bad_alloc");
3688 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3689 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3691 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3692 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3696 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3699 new_eh_spec = noexcept_false_spec;
3701 /* Ensure attribs.c is initialized. */
3703 extvisattr = build_tree_list (get_identifier ("externally_visible"),
3705 newattrs = tree_cons (get_identifier ("alloc_size"),
3706 build_tree_list (NULL_TREE, integer_one_node),
3708 newtype = cp_build_type_attribute_variant (ptr_ftype_sizetype, newattrs);
3709 newtype = build_exception_variant (newtype, new_eh_spec);
3710 deltype = cp_build_type_attribute_variant (void_ftype_ptr, extvisattr);
3711 deltype = build_exception_variant (deltype, empty_except_spec);
3712 push_cp_library_fn (NEW_EXPR, newtype);
3713 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3714 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3715 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3717 nullptr_type_node = make_node (NULLPTR_TYPE);
3718 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3719 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3720 TYPE_UNSIGNED (nullptr_type_node) = 1;
3721 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3722 SET_TYPE_MODE (nullptr_type_node, ptr_mode);
3723 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3724 nullptr_node = build_int_cst (nullptr_type_node, 0);
3728 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3730 /* Perform other language dependent initializations. */
3731 init_class_processing ();
3732 init_rtti_processing ();
3733 init_template_processing ();
3735 if (flag_exceptions)
3736 init_exception_processing ();
3738 if (! supports_one_only ())
3741 make_fname_decl = cp_make_fname_decl;
3742 start_fname_decls ();
3744 /* Show we use EH for cleanups. */
3745 if (flag_exceptions)
3746 using_eh_for_cleanups ();
3749 /* Generate an initializer for a function naming variable from
3750 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3751 filled in with the type of the init. */
3754 cp_fname_init (const char* name, tree *type_p)
3756 tree domain = NULL_TREE;
3758 tree init = NULL_TREE;
3763 length = strlen (name);
3764 domain = build_index_type (size_int (length));
3765 init = build_string (length + 1, name);
3768 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3769 type = build_cplus_array_type (type, domain);
3774 TREE_TYPE (init) = type;
3776 init = error_mark_node;
3781 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3782 the decl, LOC is the location to give the decl, NAME is the
3783 initialization string and TYPE_DEP indicates whether NAME depended
3784 on the type of the function. We make use of that to detect
3785 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3786 at the point of first use, so we mustn't push the decl now. */
3789 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3791 const char *const name = (type_dep && processing_template_decl
3792 ? NULL : fname_as_string (type_dep));
3794 tree init = cp_fname_init (name, &type);
3795 tree decl = build_decl (loc, VAR_DECL, id, type);
3798 free (CONST_CAST (char *, name));
3800 /* As we're using pushdecl_with_scope, we must set the context. */
3801 DECL_CONTEXT (decl) = current_function_decl;
3802 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3804 TREE_STATIC (decl) = 1;
3805 TREE_READONLY (decl) = 1;
3806 DECL_ARTIFICIAL (decl) = 1;
3808 TREE_USED (decl) = 1;
3810 if (current_function_decl)
3812 cp_binding_level *b = current_binding_level;
3813 if (b->kind == sk_function_parms)
3814 return error_mark_node;
3815 while (b->level_chain->kind != sk_function_parms)
3817 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3818 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3819 LOOKUP_ONLYCONVERTING);
3823 DECL_THIS_STATIC (decl) = true;
3824 pushdecl_top_level_and_finish (decl, init);
3831 builtin_function_1 (tree decl, tree context, bool is_global)
3833 tree id = DECL_NAME (decl);
3834 const char *name = IDENTIFIER_POINTER (id);
3836 retrofit_lang_decl (decl);
3838 DECL_ARTIFICIAL (decl) = 1;
3839 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3840 SET_DECL_LANGUAGE (decl, lang_c);
3841 /* Runtime library routines are, by definition, available in an
3842 external shared object. */
3843 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3844 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3846 DECL_CONTEXT (decl) = context;
3849 pushdecl_top_level (decl);
3853 /* A function in the user's namespace should have an explicit
3854 declaration before it is used. Mark the built-in function as
3855 anticipated but not actually declared. */
3856 if (name[0] != '_' || name[1] != '_')
3857 DECL_ANTICIPATED (decl) = 1;
3858 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3860 size_t len = strlen (name);
3862 /* Treat __*_chk fortification functions as anticipated as well,
3863 unless they are __builtin_*. */
3864 if (len > strlen ("___chk")
3865 && memcmp (name + len - strlen ("_chk"),
3866 "_chk", strlen ("_chk") + 1) == 0)
3867 DECL_ANTICIPATED (decl) = 1;
3874 cxx_builtin_function (tree decl)
3876 tree id = DECL_NAME (decl);
3877 const char *name = IDENTIFIER_POINTER (id);
3878 /* All builtins that don't begin with an '_' should additionally
3879 go in the 'std' namespace. */
3882 tree decl2 = copy_node(decl);
3883 push_namespace (std_identifier);
3884 builtin_function_1 (decl2, std_node, false);
3888 return builtin_function_1 (decl, NULL_TREE, false);
3891 /* Like cxx_builtin_function, but guarantee the function is added to the global
3892 scope. This is to allow function specific options to add new machine
3893 dependent builtins when the target ISA changes via attribute((target(...)))
3894 which saves space on program startup if the program does not use non-generic
3898 cxx_builtin_function_ext_scope (tree decl)
3901 tree id = DECL_NAME (decl);
3902 const char *name = IDENTIFIER_POINTER (id);
3903 /* All builtins that don't begin with an '_' should additionally
3904 go in the 'std' namespace. */
3907 tree decl2 = copy_node(decl);
3908 push_namespace (std_identifier);
3909 builtin_function_1 (decl2, std_node, true);
3913 return builtin_function_1 (decl, NULL_TREE, true);
3916 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3917 function. Not called directly. */
3920 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3922 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3923 DECL_EXTERNAL (fn) = 1;
3924 TREE_PUBLIC (fn) = 1;
3925 DECL_ARTIFICIAL (fn) = 1;
3926 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3927 SET_DECL_LANGUAGE (fn, lang_c);
3928 /* Runtime library routines are, by definition, available in an
3929 external shared object. */
3930 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3931 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3935 /* Returns the _DECL for a library function with C linkage.
3936 We assume that such functions never throw; if this is incorrect,
3937 callers should unset TREE_NOTHROW. */
3940 build_library_fn (tree name, tree type)
3942 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3943 TREE_NOTHROW (fn) = 1;
3947 /* Returns the _DECL for a library function with C++ linkage. */
3950 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3952 tree fn = build_library_fn_1 (name, operator_code, type);
3953 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3954 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3955 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3959 /* Like build_library_fn, but takes a C string instead of an
3963 build_library_fn_ptr (const char* name, tree type)
3965 return build_library_fn (get_identifier (name), type);
3968 /* Like build_cp_library_fn, but takes a C string instead of an
3972 build_cp_library_fn_ptr (const char* name, tree type)
3974 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3977 /* Like build_library_fn, but also pushes the function so that we will
3978 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3979 may throw exceptions listed in RAISES. */
3982 push_library_fn (tree name, tree type, tree raises)
3987 type = build_exception_variant (type, raises);
3989 fn = build_library_fn (name, type);
3990 pushdecl_top_level (fn);
3994 /* Like build_cp_library_fn, but also pushes the function so that it
3995 will be found by normal lookup. */
3998 push_cp_library_fn (enum tree_code operator_code, tree type)
4000 tree fn = build_cp_library_fn (ansi_opname (operator_code),
4007 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4011 push_void_library_fn (tree name, tree parmtypes)
4013 tree type = build_function_type (void_type_node, parmtypes);
4014 return push_library_fn (name, type, NULL_TREE);
4017 /* Like push_library_fn, but also note that this function throws
4018 and does not return. Used for __throw_foo and the like. */
4021 push_throw_library_fn (tree name, tree type)
4023 tree fn = push_library_fn (name, type, NULL_TREE);
4024 TREE_THIS_VOLATILE (fn) = 1;
4025 TREE_NOTHROW (fn) = 0;
4029 /* When we call finish_struct for an anonymous union, we create
4030 default copy constructors and such. But, an anonymous union
4031 shouldn't have such things; this function undoes the damage to the
4032 anonymous union type T.
4034 (The reason that we create the synthesized methods is that we don't
4035 distinguish `union { int i; }' from `typedef union { int i; } U'.
4036 The first is an anonymous union; the second is just an ordinary
4040 fixup_anonymous_aggr (tree t)
4044 /* Wipe out memory of synthesized methods. */
4045 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
4046 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
4047 TYPE_HAS_COPY_CTOR (t) = 0;
4048 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
4049 TYPE_HAS_COPY_ASSIGN (t) = 0;
4050 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
4052 /* Splice the implicitly generated functions out of the TYPE_METHODS
4054 q = &TYPE_METHODS (t);
4057 if (DECL_ARTIFICIAL (*q))
4058 *q = TREE_CHAIN (*q);
4060 q = &DECL_CHAIN (*q);
4063 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4064 if (TYPE_METHODS (t))
4066 tree decl = TYPE_MAIN_DECL (t);
4068 if (TREE_CODE (t) != UNION_TYPE)
4069 error_at (DECL_SOURCE_LOCATION (decl),
4070 "an anonymous struct cannot have function members");
4072 error_at (DECL_SOURCE_LOCATION (decl),
4073 "an anonymous union cannot have function members");
4076 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4077 assignment operators (because they cannot have these methods themselves).
4078 For anonymous unions this is already checked because they are not allowed
4079 in any union, otherwise we have to check it. */
4080 if (TREE_CODE (t) != UNION_TYPE)
4084 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
4085 if (TREE_CODE (field) == FIELD_DECL)
4087 type = TREE_TYPE (field);
4088 if (CLASS_TYPE_P (type))
4090 if (TYPE_NEEDS_CONSTRUCTING (type))
4091 error ("member %q+#D with constructor not allowed "
4092 "in anonymous aggregate", field);
4093 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
4094 error ("member %q+#D with destructor not allowed "
4095 "in anonymous aggregate", field);
4096 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
4097 error ("member %q+#D with copy assignment operator "
4098 "not allowed in anonymous aggregate", field);
4104 /* Make sure that a declaration with no declarator is well-formed, i.e.
4105 just declares a tagged type or anonymous union.
4107 Returns the type declared; or NULL_TREE if none. */
4110 check_tag_decl (cp_decl_specifier_seq *declspecs)
4112 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4113 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4114 /* If a class, struct, or enum type is declared by the DECLSPECS
4115 (i.e, if a class-specifier, enum-specifier, or non-typename
4116 elaborated-type-specifier appears in the DECLSPECS),
4117 DECLARED_TYPE is set to the corresponding type. */
4118 tree declared_type = NULL_TREE;
4119 bool error_p = false;
4121 if (declspecs->multiple_types_p)
4122 error ("multiple types in one declaration");
4123 else if (declspecs->redefined_builtin_type)
4125 if (!in_system_header)
4126 permerror (input_location, "redeclaration of C++ built-in type %qT",
4127 declspecs->redefined_builtin_type);
4132 && TYPE_P (declspecs->type)
4133 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4134 && MAYBE_CLASS_TYPE_P (declspecs->type))
4135 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4136 declared_type = declspecs->type;
4137 else if (declspecs->type == error_mark_node)
4139 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4140 permerror (input_location, "declaration does not declare anything");
4141 /* Check for an anonymous union. */
4142 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4143 && TYPE_ANONYMOUS_P (declared_type))
4145 /* 7/3 In a simple-declaration, the optional init-declarator-list
4146 can be omitted only when declaring a class (clause 9) or
4147 enumeration (7.2), that is, when the decl-specifier-seq contains
4148 either a class-specifier, an elaborated-type-specifier with
4149 a class-key (9.1), or an enum-specifier. In these cases and
4150 whenever a class-specifier or enum-specifier is present in the
4151 decl-specifier-seq, the identifiers in these specifiers are among
4152 the names being declared by the declaration (as class-name,
4153 enum-names, or enumerators, depending on the syntax). In such
4154 cases, and except for the declaration of an unnamed bit-field (9.6),
4155 the decl-specifier-seq shall introduce one or more names into the
4156 program, or shall redeclare a name introduced by a previous
4157 declaration. [Example:
4158 enum { }; // ill-formed
4159 typedef class { }; // ill-formed
4163 error ("missing type-name in typedef-declaration");
4166 /* Anonymous unions are objects, so they can have specifiers. */;
4167 SET_ANON_AGGR_TYPE_P (declared_type);
4169 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4170 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4175 if (declspecs->specs[(int)ds_inline]
4176 || declspecs->specs[(int)ds_virtual])
4177 error ("%qs can only be specified for functions",
4178 declspecs->specs[(int)ds_inline]
4179 ? "inline" : "virtual");
4181 && (!current_class_type
4182 || current_scope () != current_class_type))
4183 error ("%<friend%> can only be specified inside a class");
4184 else if (declspecs->specs[(int)ds_explicit])
4185 error ("%<explicit%> can only be specified for constructors");
4186 else if (declspecs->storage_class)
4187 error ("a storage class can only be specified for objects "
4189 else if (declspecs->specs[(int)ds_const]
4190 || declspecs->specs[(int)ds_volatile]
4191 || declspecs->specs[(int)ds_restrict]
4192 || declspecs->specs[(int)ds_thread])
4193 error ("qualifiers can only be specified for objects "
4195 else if (saw_typedef)
4196 warning (0, "%<typedef%> was ignored in this declaration");
4197 else if (declspecs->specs[(int) ds_constexpr])
4198 error ("%<constexpr%> cannot be used for type declarations");
4201 return declared_type;
4204 /* Called when a declaration is seen that contains no names to declare.
4205 If its type is a reference to a structure, union or enum inherited
4206 from a containing scope, shadow that tag name for the current scope
4207 with a forward reference.
4208 If its type defines a new named structure or union
4209 or defines an enum, it is valid but we need not do anything here.
4210 Otherwise, it is an error.
4212 C++: may have to grok the declspecs to learn about static,
4213 complain for anonymous unions.
4215 Returns the TYPE declared -- or NULL_TREE if none. */
4218 shadow_tag (cp_decl_specifier_seq *declspecs)
4220 tree t = check_tag_decl (declspecs);
4225 if (declspecs->attributes)
4227 warning (0, "attribute ignored in declaration of %q+#T", t);
4228 warning (0, "attribute for %q+#T must follow the %qs keyword",
4229 t, class_key_or_enum_as_string (t));
4233 if (maybe_process_partial_specialization (t) == error_mark_node)
4236 /* This is where the variables in an anonymous union are
4237 declared. An anonymous union declaration looks like:
4239 because there is no declarator after the union, the parser
4240 sends that declaration here. */
4241 if (ANON_AGGR_TYPE_P (t))
4243 fixup_anonymous_aggr (t);
4245 if (TYPE_FIELDS (t))
4247 tree decl = grokdeclarator (/*declarator=*/NULL,
4248 declspecs, NORMAL, 0, NULL);
4249 finish_anon_union (decl);
4256 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4259 groktypename (cp_decl_specifier_seq *type_specifiers,
4260 const cp_declarator *declarator,
4261 bool is_template_arg)
4265 enum decl_context context
4266 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4267 attrs = type_specifiers->attributes;
4268 type_specifiers->attributes = NULL_TREE;
4269 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4270 if (attrs && type != error_mark_node)
4272 if (CLASS_TYPE_P (type))
4273 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4274 "outside of definition", type);
4275 else if (MAYBE_CLASS_TYPE_P (type))
4276 /* A template type parameter or other dependent type. */
4277 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4278 "type %qT without an associated declaration", type);
4280 cplus_decl_attributes (&type, attrs, 0);
4285 /* Process a DECLARATOR for a function-scope variable declaration,
4286 namespace-scope variable declaration, or function declaration.
4287 (Function definitions go through start_function; class member
4288 declarations appearing in the body of the class go through
4289 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4290 If an error occurs, the error_mark_node is returned instead.
4292 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4293 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4294 for an explicitly defaulted function, or SD_DELETED for an explicitly
4295 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4296 implicitly initialized via a default constructor. ATTRIBUTES and
4297 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4298 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4299 set, the caller is responsible for calling pop_scope. */
4302 start_decl (const cp_declarator *declarator,
4303 cp_decl_specifier_seq *declspecs,
4306 tree prefix_attributes,
4307 tree *pushed_scope_p)
4315 *pushed_scope_p = NULL_TREE;
4317 /* An object declared as __attribute__((deprecated)) suppresses
4318 warnings of uses of other deprecated items. */
4319 if (lookup_attribute ("deprecated", attributes))
4320 deprecated_state = DEPRECATED_SUPPRESS;
4322 attributes = chainon (attributes, prefix_attributes);
4324 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4327 deprecated_state = DEPRECATED_NORMAL;
4329 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4330 || decl == error_mark_node)
4331 return error_mark_node;
4333 context = CP_DECL_CONTEXT (decl);
4334 if (context != global_namespace)
4335 *pushed_scope_p = push_scope (context);
4338 /* Is it valid for this decl to have an initializer at all?
4339 If not, set INITIALIZED to zero, which will indirectly
4340 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4341 switch (TREE_CODE (decl))
4344 error ("typedef %qD is initialized (use decltype instead)", decl);
4345 return error_mark_node;
4348 if (initialized == SD_DELETED)
4349 /* We'll handle the rest of the semantics later, but we need to
4350 set this now so it's visible to duplicate_decls. */
4351 DECL_DELETED_FN (decl) = 1;
4360 if (! toplevel_bindings_p ()
4361 && DECL_EXTERNAL (decl))
4362 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4364 DECL_EXTERNAL (decl) = 0;
4365 if (toplevel_bindings_p ())
4366 TREE_STATIC (decl) = 1;
4368 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4370 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4371 record_key_method_defined (decl);
4373 /* If this is a typedef that names the class for linkage purposes
4374 (7.1.3p8), apply any attributes directly to the type. */
4375 if (TREE_CODE (decl) == TYPE_DECL
4376 && TAGGED_TYPE_P (TREE_TYPE (decl))
4377 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4378 flags = ATTR_FLAG_TYPE_IN_PLACE;
4382 /* Set attributes here so if duplicate decl, will have proper attributes. */
4383 cplus_decl_attributes (&decl, attributes, flags);
4385 /* Dllimported symbols cannot be defined. Static data members (which
4386 can be initialized in-class and dllimported) go through grokfield,
4387 not here, so we don't need to exclude those decls when checking for
4389 if (initialized && DECL_DLLIMPORT_P (decl))
4391 error ("definition of %q#D is marked %<dllimport%>", decl);
4392 DECL_DLLIMPORT_P (decl) = 0;
4395 /* If #pragma weak was used, mark the decl weak now. */
4396 maybe_apply_pragma_weak (decl);
4398 if (TREE_CODE (decl) == FUNCTION_DECL
4399 && DECL_DECLARED_INLINE_P (decl)
4400 && DECL_UNINLINABLE (decl)
4401 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4402 warning (0, "inline function %q+D given attribute noinline", decl);
4404 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4406 if (TREE_CODE (decl) == VAR_DECL)
4408 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4409 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4410 error ("%q#D is not a static member of %q#T", decl, context);
4413 if (DECL_CONTEXT (field) != context)
4415 if (!same_type_p (DECL_CONTEXT (field), context))
4416 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4417 "to be defined as %<%T::%D%>",
4418 DECL_CONTEXT (field), DECL_NAME (decl),
4419 context, DECL_NAME (decl));
4420 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4422 if (processing_specialization
4423 && template_class_depth (context) == 0
4424 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4425 error ("template header not allowed in member definition "
4426 "of explicitly specialized class");
4427 /* Static data member are tricky; an in-class initialization
4428 still doesn't provide a definition, so the in-class
4429 declaration will have DECL_EXTERNAL set, but will have an
4430 initialization. Thus, duplicate_decls won't warn
4431 about this situation, and so we check here. */
4432 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4433 error ("duplicate initialization of %qD", decl);
4434 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4436 if (declspecs->specs[(int) ds_constexpr]
4437 && !DECL_DECLARED_CONSTEXPR_P (field))
4438 error ("%qD declared %<constexpr%> outside its class", field);
4443 tree field = check_classfn (context, decl,
4444 (processing_template_decl
4445 > template_class_depth (context))
4446 ? current_template_parms
4448 if (field && field != error_mark_node
4449 && duplicate_decls (decl, field,
4450 /*newdecl_is_friend=*/false))
4454 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4455 DECL_IN_AGGR_P (decl) = 0;
4456 /* Do not mark DECL as an explicit specialization if it was not
4457 already marked as an instantiation; a declaration should
4458 never be marked as a specialization unless we know what
4459 template is being specialized. */
4460 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4462 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4464 /* [temp.expl.spec] An explicit specialization of a static data
4465 member of a template is a definition if the declaration
4466 includes an initializer; otherwise, it is a declaration.
4468 We check for processing_specialization so this only applies
4469 to the new specialization syntax. */
4470 if (!initialized && processing_specialization)
4471 DECL_EXTERNAL (decl) = 1;
4474 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4475 /* Aliases are definitions. */
4477 permerror (input_location, "declaration of %q#D outside of class is not definition",
4481 was_public = TREE_PUBLIC (decl);
4483 /* Enter this declaration into the symbol table. */
4484 decl = maybe_push_decl (decl);
4486 if (processing_template_decl)
4487 decl = push_template_decl (decl);
4488 if (decl == error_mark_node)
4489 return error_mark_node;
4491 /* Tell the back end to use or not use .common as appropriate. If we say
4492 -fconserve-space, we want this to save .data space, at the expense of
4493 wrong semantics. If we say -fno-conserve-space, we want this to
4494 produce errors about redefs; to do this we force variables into the
4496 if (flag_conserve_space
4497 && TREE_CODE (decl) == VAR_DECL
4498 && TREE_PUBLIC (decl)
4499 && !DECL_THREAD_LOCAL_P (decl)
4500 && !have_global_bss_p ())
4501 DECL_COMMON (decl) = 1;
4503 if (TREE_CODE (decl) == VAR_DECL
4504 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4505 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4507 /* This is a const variable with implicit 'static'. Set
4508 DECL_THIS_STATIC so we can tell it from variables that are
4509 !TREE_PUBLIC because of the anonymous namespace. */
4510 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4511 DECL_THIS_STATIC (decl) = 1;
4514 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4515 start_decl_1 (decl, initialized);
4520 /* Process the declaration of a variable DECL. INITIALIZED is true
4521 iff DECL is explicitly initialized. (INITIALIZED is false if the
4522 variable is initialized via an implicitly-called constructor.)
4523 This function must be called for ordinary variables (including, for
4524 example, implicit instantiations of templates), but must not be
4525 called for template declarations. */
4528 start_decl_1 (tree decl, bool initialized)
4532 bool aggregate_definition_p;
4534 gcc_assert (!processing_template_decl);
4536 if (error_operand_p (decl))
4539 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4541 type = TREE_TYPE (decl);
4542 complete_p = COMPLETE_TYPE_P (type);
4543 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4545 /* If an explicit initializer is present, or if this is a definition
4546 of an aggregate, then we need a complete type at this point.
4547 (Scalars are always complete types, so there is nothing to
4548 check.) This code just sets COMPLETE_P; errors (if necessary)
4549 are issued below. */
4550 if ((initialized || aggregate_definition_p)
4552 && COMPLETE_TYPE_P (complete_type (type)))
4555 /* We will not yet have set TREE_READONLY on DECL if the type
4556 was "const", but incomplete, before this point. But, now, we
4557 have a complete type, so we can try again. */
4558 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4562 /* Is it valid for this decl to have an initializer at all? */
4564 /* Don't allow initializations for incomplete types except for
4565 arrays which might be completed by the initialization. */
4567 ; /* A complete type is ok. */
4568 else if (type_uses_auto (type))
4569 ; /* An auto type is ok. */
4570 else if (TREE_CODE (type) != ARRAY_TYPE)
4572 error ("variable %q#D has initializer but incomplete type", decl);
4573 type = TREE_TYPE (decl) = error_mark_node;
4575 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4577 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4578 error ("elements of array %q#D have incomplete type", decl);
4579 /* else we already gave an error in start_decl. */
4582 else if (aggregate_definition_p && !complete_p)
4584 if (type_uses_auto (type))
4585 error ("declaration of %q#D has no initializer", decl);
4587 error ("aggregate %q#D has incomplete type and cannot be defined",
4589 /* Change the type so that assemble_variable will give
4590 DECL an rtl we can live with: (mem (const_int 0)). */
4591 type = TREE_TYPE (decl) = error_mark_node;
4594 /* Create a new scope to hold this declaration if necessary.
4595 Whether or not a new scope is necessary cannot be determined
4596 until after the type has been completed; if the type is a
4597 specialization of a class template it is not until after
4598 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4599 will be set correctly. */
4600 maybe_push_cleanup_level (type);
4603 /* Handle initialization of references. DECL, TYPE, and INIT have the
4604 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4605 but will be set to a new CLEANUP_STMT if a temporary is created
4606 that must be destroyed subsequently.
4608 Returns an initializer expression to use to initialize DECL, or
4609 NULL if the initialization can be performed statically.
4611 Quotes on semantics can be found in ARM 8.4.3. */
4614 grok_reference_init (tree decl, tree type, tree init, int flags)
4616 if (init == NULL_TREE)
4618 if ((DECL_LANG_SPECIFIC (decl) == 0
4619 || DECL_IN_AGGR_P (decl) == 0)
4620 && ! DECL_THIS_EXTERN (decl))
4621 error ("%qD declared as reference but not initialized", decl);
4625 if (TREE_CODE (init) == TREE_LIST)
4626 init = build_x_compound_expr_from_list (init, ELK_INIT,
4627 tf_warning_or_error);
4629 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4630 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4631 /* Note: default conversion is only called in very special cases. */
4632 init = decay_conversion (init);
4634 /* Convert INIT to the reference type TYPE. This may involve the
4635 creation of a temporary, whose lifetime must be the same as that
4636 of the reference. If so, a DECL_EXPR for the temporary will be
4637 added just after the DECL_EXPR for DECL. That's why we don't set
4638 DECL_INITIAL for local references (instead assigning to them
4639 explicitly); we need to allow the temporary to be initialized
4641 return initialize_reference (type, init, flags,
4642 tf_warning_or_error);
4645 /* Designated initializers in arrays are not supported in GNU C++.
4646 The parser cannot detect this error since it does not know whether
4647 a given brace-enclosed initializer is for a class type or for an
4648 array. This function checks that CE does not use a designated
4649 initializer. If it does, an error is issued. Returns true if CE
4650 is valid, i.e., does not have a designated initializer. */
4653 check_array_designated_initializer (const constructor_elt *ce,
4654 unsigned HOST_WIDE_INT index)
4656 /* Designated initializers for array elements are not supported. */
4659 /* The parser only allows identifiers as designated
4661 if (ce->index == error_mark_node)
4662 error ("name used in a GNU-style designated "
4663 "initializer for an array");
4664 else if (TREE_CODE (ce->index) == INTEGER_CST)
4666 /* A C99 designator is OK if it matches the current index. */
4667 if (TREE_INT_CST_LOW (ce->index) == index)
4670 sorry ("non-trivial designated initializers not supported");
4674 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4675 error ("name %qD used in a GNU-style designated "
4676 "initializer for an array", ce->index);
4684 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4685 array until we finish parsing the initializer. If that's the
4686 situation we're in, update DECL accordingly. */
4689 maybe_deduce_size_from_array_init (tree decl, tree init)
4691 tree type = TREE_TYPE (decl);
4693 if (TREE_CODE (type) == ARRAY_TYPE
4694 && TYPE_DOMAIN (type) == NULL_TREE
4695 && TREE_CODE (decl) != TYPE_DECL)
4697 /* do_default is really a C-ism to deal with tentative definitions.
4698 But let's leave it here to ease the eventual merge. */
4699 int do_default = !DECL_EXTERNAL (decl);
4700 tree initializer = init ? init : DECL_INITIAL (decl);
4703 /* Check that there are no designated initializers in INIT, as
4704 those are not supported in GNU C++, and as the middle-end
4705 will crash if presented with a non-numeric designated
4707 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4709 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4710 constructor_elt *ce;
4712 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4713 if (!check_array_designated_initializer (ce, i))
4719 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4723 error ("initializer fails to determine size of %qD", decl);
4724 TREE_TYPE (decl) = error_mark_node;
4726 else if (failure == 2)
4730 error ("array size missing in %qD", decl);
4731 TREE_TYPE (decl) = error_mark_node;
4733 /* If a `static' var's size isn't known, make it extern as
4734 well as static, so it does not get allocated. If it's not
4735 `static', then don't mark it extern; finish_incomplete_decl
4736 will give it a default size and it will get allocated. */
4737 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4738 DECL_EXTERNAL (decl) = 1;
4740 else if (failure == 3)
4742 error ("zero-size array %qD", decl);
4743 TREE_TYPE (decl) = error_mark_node;
4747 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4749 relayout_decl (decl);
4753 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4754 any appropriate error messages regarding the layout. */
4757 layout_var_decl (tree decl)
4761 type = TREE_TYPE (decl);
4762 if (type == error_mark_node)
4765 /* If we haven't already layed out this declaration, do so now.
4766 Note that we must not call complete type for an external object
4767 because it's type might involve templates that we are not
4768 supposed to instantiate yet. (And it's perfectly valid to say
4769 `extern X x' for some incomplete type `X'.) */
4770 if (!DECL_EXTERNAL (decl))
4771 complete_type (type);
4772 if (!DECL_SIZE (decl)
4773 && TREE_TYPE (decl) != error_mark_node
4774 && (COMPLETE_TYPE_P (type)
4775 || (TREE_CODE (type) == ARRAY_TYPE
4776 && !TYPE_DOMAIN (type)
4777 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4778 layout_decl (decl, 0);
4780 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4782 /* An automatic variable with an incomplete type: that is an error.
4783 Don't talk about array types here, since we took care of that
4784 message in grokdeclarator. */
4785 error ("storage size of %qD isn%'t known", decl);
4786 TREE_TYPE (decl) = error_mark_node;
4789 /* Keep this code around in case we later want to control debug info
4790 based on whether a type is "used". (jason 1999-11-11) */
4792 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4793 /* Let debugger know it should output info for this type. */
4794 note_debug_info_needed (ttype);
4796 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4797 note_debug_info_needed (DECL_CONTEXT (decl));
4800 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4801 && DECL_SIZE (decl) != NULL_TREE
4802 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4804 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4805 constant_expression_warning (DECL_SIZE (decl));
4808 error ("storage size of %qD isn%'t constant", decl);
4809 TREE_TYPE (decl) = error_mark_node;
4814 /* If a local static variable is declared in an inline function, or if
4815 we have a weak definition, we must endeavor to create only one
4816 instance of the variable at link-time. */
4819 maybe_commonize_var (tree decl)
4821 /* Static data in a function with comdat linkage also has comdat
4823 if (TREE_STATIC (decl)
4824 /* Don't mess with __FUNCTION__. */
4825 && ! DECL_ARTIFICIAL (decl)
4826 && DECL_FUNCTION_SCOPE_P (decl)
4827 && vague_linkage_p (DECL_CONTEXT (decl)))
4831 /* With weak symbols, we simply make the variable COMDAT;
4832 that will cause copies in multiple translations units to
4834 comdat_linkage (decl);
4838 if (DECL_INITIAL (decl) == NULL_TREE
4839 || DECL_INITIAL (decl) == error_mark_node)
4841 /* Without weak symbols, we can use COMMON to merge
4842 uninitialized variables. */
4843 TREE_PUBLIC (decl) = 1;
4844 DECL_COMMON (decl) = 1;
4848 /* While for initialized variables, we must use internal
4849 linkage -- which means that multiple copies will not
4851 TREE_PUBLIC (decl) = 0;
4852 DECL_COMMON (decl) = 0;
4853 warning_at (input_location, 0,
4854 "sorry: semantics of inline function static "
4855 "data %q+#D are wrong (you%'ll wind up "
4856 "with multiple copies)", decl);
4857 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4858 " you can work around this by removing "
4863 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4864 /* Set it up again; we might have set DECL_INITIAL since the last
4866 comdat_linkage (decl);
4869 /* Issue an error message if DECL is an uninitialized const variable. */
4872 check_for_uninitialized_const_var (tree decl)
4874 tree type = strip_array_types (TREE_TYPE (decl));
4876 /* ``Unless explicitly declared extern, a const object does not have
4877 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4879 if (TREE_CODE (decl) == VAR_DECL
4880 && TREE_CODE (type) != REFERENCE_TYPE
4881 && CP_TYPE_CONST_P (type)
4882 && !DECL_INITIAL (decl))
4884 tree field = default_init_uninitialized_part (type);
4888 permerror (DECL_SOURCE_LOCATION (decl),
4889 "uninitialized const %qD", decl);
4891 if (CLASS_TYPE_P (type))
4893 tree defaulted_ctor;
4895 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4896 "%q#T has no user-provided default constructor", type);
4897 defaulted_ctor = in_class_defaulted_default_constructor (type);
4899 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4900 "constructor is not user-provided because it is "
4901 "explicitly defaulted in the class body");
4902 inform (0, "and the implicitly-defined constructor does not "
4903 "initialize %q+#D", field);
4908 /* Structure holding the current initializer being processed by reshape_init.
4909 CUR is a pointer to the current element being processed, END is a pointer
4910 after the last element present in the initializer. */
4911 typedef struct reshape_iterator_t
4913 constructor_elt *cur;
4914 constructor_elt *end;
4917 static tree reshape_init_r (tree, reshape_iter *, bool, tsubst_flags_t);
4919 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4920 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4921 initialized. If there are no more such fields, the return value
4925 next_initializable_field (tree field)
4928 && (TREE_CODE (field) != FIELD_DECL
4929 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4930 || DECL_ARTIFICIAL (field)))
4931 field = DECL_CHAIN (field);
4936 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4937 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4938 INTEGER_CST representing the size of the array minus one (the maximum index),
4939 or NULL_TREE if the array was declared without specifying the size. D is
4940 the iterator within the constructor. */
4943 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
4944 tsubst_flags_t complain)
4947 bool sized_array_p = (max_index != NULL_TREE);
4948 unsigned HOST_WIDE_INT max_index_cst = 0;
4949 unsigned HOST_WIDE_INT index;
4951 /* The initializer for an array is always a CONSTRUCTOR. */
4952 new_init = build_constructor (init_list_type_node, NULL);
4956 /* Minus 1 is used for zero sized arrays. */
4957 if (integer_all_onesp (max_index))
4960 if (host_integerp (max_index, 1))
4961 max_index_cst = tree_low_cst (max_index, 1);
4962 /* sizetype is sign extended, not zero extended. */
4964 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4968 /* Loop until there are no more initializers. */
4970 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4975 check_array_designated_initializer (d->cur, index);
4976 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false,
4978 if (elt_init == error_mark_node)
4979 return error_mark_node;
4980 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4981 size_int (index), elt_init);
4982 if (!TREE_CONSTANT (elt_init))
4983 TREE_CONSTANT (new_init) = false;
4989 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4990 Parameters are the same of reshape_init_r. */
4993 reshape_init_array (tree type, reshape_iter *d, tsubst_flags_t complain)
4995 tree max_index = NULL_TREE;
4997 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4999 if (TYPE_DOMAIN (type))
5000 max_index = array_type_nelts (type);
5002 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5005 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5006 Parameters are the same of reshape_init_r. */
5009 reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
5011 tree max_index = NULL_TREE;
5013 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
5015 if (COMPOUND_LITERAL_P (d->cur->value))
5017 tree value = d->cur->value;
5018 if (!same_type_p (TREE_TYPE (value), type))
5020 if (complain & tf_error)
5021 error ("invalid type %qT as initializer for a vector of type %qT",
5022 TREE_TYPE (d->cur->value), type);
5023 value = error_mark_node;
5029 /* For a vector, we initialize it as an array of the appropriate size. */
5030 if (TREE_CODE (type) == VECTOR_TYPE)
5031 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
5033 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5036 /* Subroutine of reshape_init_r, processes the initializers for classes
5037 or union. Parameters are the same of reshape_init_r. */
5040 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
5041 tsubst_flags_t complain)
5046 gcc_assert (CLASS_TYPE_P (type));
5048 /* The initializer for a class is always a CONSTRUCTOR. */
5049 new_init = build_constructor (init_list_type_node, NULL);
5050 field = next_initializable_field (TYPE_FIELDS (type));
5056 An initializer for an aggregate member that is an
5057 empty class shall have the form of an empty
5058 initializer-list {}. */
5059 if (!first_initializer_p)
5061 if (complain & tf_error)
5062 error ("initializer for %qT must be brace-enclosed", type);
5063 return error_mark_node;
5068 /* Loop through the initializable fields, gathering initializers. */
5069 while (d->cur != d->end)
5073 /* Handle designated initializers, as an extension. */
5076 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5078 if (!field || TREE_CODE (field) != FIELD_DECL)
5080 if (complain & tf_error)
5081 error ("%qT has no non-static data member named %qD", type,
5083 return error_mark_node;
5087 /* If we processed all the member of the class, we are done. */
5091 field_init = reshape_init_r (TREE_TYPE (field), d,
5092 /*first_initializer_p=*/false, complain);
5093 if (field_init == error_mark_node)
5094 return error_mark_node;
5096 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5100 When a union is initialized with a brace-enclosed
5101 initializer, the braces shall only contain an
5102 initializer for the first member of the union. */
5103 if (TREE_CODE (type) == UNION_TYPE)
5106 field = next_initializable_field (DECL_CHAIN (field));
5112 /* Subroutine of reshape_init, which processes a single initializer (part of
5113 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5114 iterator within the CONSTRUCTOR which points to the initializer to process.
5115 FIRST_INITIALIZER_P is true if this is the first initializer of the
5116 outermost CONSTRUCTOR node. */
5119 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p,
5120 tsubst_flags_t complain)
5122 tree init = d->cur->value;
5124 if (error_operand_p (init))
5125 return error_mark_node;
5127 if (TREE_CODE (type) == COMPLEX_TYPE)
5129 /* A complex type can be initialized from one or two initializers,
5130 but braces are not elided. */
5132 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5134 if (CONSTRUCTOR_NELTS (init) > 2)
5136 if (complain & tf_error)
5137 error ("too many initializers for %qT", type);
5139 return error_mark_node;
5142 else if (first_initializer_p && d->cur != d->end)
5144 VEC(constructor_elt, gc) *v = 0;
5145 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5146 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5148 init = build_constructor (init_list_type_node, v);
5153 /* A non-aggregate type is always initialized with a single
5155 if (!CP_AGGREGATE_TYPE_P (type))
5157 /* It is invalid to initialize a non-aggregate type with a
5158 brace-enclosed initializer before C++0x.
5159 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5160 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5161 a CONSTRUCTOR (with a record type). */
5162 if (TREE_CODE (init) == CONSTRUCTOR
5163 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5165 if (SCALAR_TYPE_P (type))
5167 if (complain & tf_error)
5168 error ("braces around scalar initializer for type %qT", type);
5169 init = error_mark_node;
5172 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5181 All implicit type conversions (clause _conv_) are considered when
5182 initializing the aggregate member with an initializer from an
5183 initializer-list. If the initializer can initialize a member,
5184 the member is initialized. Otherwise, if the member is itself a
5185 non-empty subaggregate, brace elision is assumed and the
5186 initializer is considered for the initialization of the first
5187 member of the subaggregate. */
5188 if (TREE_CODE (init) != CONSTRUCTOR
5189 /* But don't try this for the first initializer, since that would be
5190 looking through the outermost braces; A a2 = { a1 }; is not a
5191 valid aggregate initialization. */
5192 && !first_initializer_p
5193 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5194 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5200 /* [dcl.init.string]
5202 A char array (whether plain char, signed char, or unsigned char)
5203 can be initialized by a string-literal (optionally enclosed in
5204 braces); a wchar_t array can be initialized by a wide
5205 string-literal (optionally enclosed in braces). */
5206 if (TREE_CODE (type) == ARRAY_TYPE
5207 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5209 tree str_init = init;
5211 /* Strip one level of braces if and only if they enclose a single
5212 element (as allowed by [dcl.init.string]). */
5213 if (!first_initializer_p
5214 && TREE_CODE (str_init) == CONSTRUCTOR
5215 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5217 str_init = VEC_index (constructor_elt,
5218 CONSTRUCTOR_ELTS (str_init), 0)->value;
5221 /* If it's a string literal, then it's the initializer for the array
5222 as a whole. Otherwise, continue with normal initialization for
5223 array types (one value per array element). */
5224 if (TREE_CODE (str_init) == STRING_CST)
5231 /* The following cases are about aggregates. If we are not within a full
5232 initializer already, and there is not a CONSTRUCTOR, it means that there
5233 is a missing set of braces (that is, we are processing the case for
5234 which reshape_init exists). */
5235 if (!first_initializer_p)
5237 if (TREE_CODE (init) == CONSTRUCTOR)
5239 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5240 /* There is no need to reshape pointer-to-member function
5241 initializers, as they are always constructed correctly
5242 by the front end. */
5244 else if (COMPOUND_LITERAL_P (init))
5245 /* For a nested compound literal, there is no need to reshape since
5246 brace elision is not allowed. Even if we decided to allow it,
5247 we should add a call to reshape_init in finish_compound_literal,
5248 before calling digest_init, so changing this code would still
5249 not be necessary. */
5250 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5254 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5255 return reshape_init (type, init, complain);
5259 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5263 /* Dispatch to specialized routines. */
5264 if (CLASS_TYPE_P (type))
5265 return reshape_init_class (type, d, first_initializer_p, complain);
5266 else if (TREE_CODE (type) == ARRAY_TYPE)
5267 return reshape_init_array (type, d, complain);
5268 else if (TREE_CODE (type) == VECTOR_TYPE)
5269 return reshape_init_vector (type, d, complain);
5274 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5275 brace-enclosed aggregate initializer.
5277 INIT is the CONSTRUCTOR containing the list of initializers describing
5278 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5279 It may not presently match the shape of the TYPE; for example:
5281 struct S { int a; int b; };
5282 struct S a[] = { 1, 2, 3, 4 };
5284 Here INIT will hold a VEC of four elements, rather than a
5285 VEC of two elements, each itself a VEC of two elements. This
5286 routine transforms INIT from the former form into the latter. The
5287 revised CONSTRUCTOR node is returned. */
5290 reshape_init (tree type, tree init, tsubst_flags_t complain)
5292 VEC(constructor_elt, gc) *v;
5296 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5298 v = CONSTRUCTOR_ELTS (init);
5300 /* An empty constructor does not need reshaping, and it is always a valid
5302 if (VEC_empty (constructor_elt, v))
5305 /* Recurse on this CONSTRUCTOR. */
5306 d.cur = VEC_index (constructor_elt, v, 0);
5307 d.end = d.cur + VEC_length (constructor_elt, v);
5309 new_init = reshape_init_r (type, &d, true, complain);
5310 if (new_init == error_mark_node)
5311 return error_mark_node;
5313 /* Make sure all the element of the constructor were used. Otherwise,
5314 issue an error about exceeding initializers. */
5317 if (complain & tf_error)
5318 error ("too many initializers for %qT", type);
5320 return error_mark_node;
5326 /* Verify array initializer. Returns true if errors have been reported. */
5329 check_array_initializer (tree decl, tree type, tree init)
5331 tree element_type = TREE_TYPE (type);
5333 /* The array type itself need not be complete, because the
5334 initializer may tell us how many elements are in the array.
5335 But, the elements of the array must be complete. */
5336 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5339 error ("elements of array %q#D have incomplete type", decl);
5341 error ("elements of array %q#T have incomplete type", type);
5344 /* It is not valid to initialize a VLA. */
5346 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5347 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5350 error ("variable-sized object %qD may not be initialized", decl);
5352 error ("variable-sized compound literal");
5358 /* Subroutine of check_initializer; args are passed down from that function.
5359 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5362 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5365 int saved_stmts_are_full_exprs_p = 0;
5366 if (building_stmt_list_p ())
5368 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5369 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5371 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5372 if (building_stmt_list_p ())
5373 current_stmt_tree ()->stmts_are_full_exprs_p =
5374 saved_stmts_are_full_exprs_p;
5378 /* Verify INIT (the initializer for DECL), and record the
5379 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5380 grok_reference_init.
5382 If the return value is non-NULL, it is an expression that must be
5383 evaluated dynamically to initialize DECL. */
5386 check_initializer (tree decl, tree init, int flags, VEC(tree,gc) **cleanups)
5388 tree type = TREE_TYPE (decl);
5389 tree init_code = NULL;
5390 tree extra_init = NULL_TREE;
5393 /* Things that are going to be initialized need to have complete
5395 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5397 if (DECL_HAS_VALUE_EXPR_P (decl))
5399 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5400 it doesn't have storage to be initialized. */
5401 gcc_assert (init == NULL_TREE);
5405 if (type == error_mark_node)
5406 /* We will have already complained. */
5409 if (TREE_CODE (type) == ARRAY_TYPE)
5411 if (check_array_initializer (decl, type, init))
5414 else if (!COMPLETE_TYPE_P (type))
5416 error ("%qD has incomplete type", decl);
5417 TREE_TYPE (decl) = error_mark_node;
5421 /* There is no way to make a variable-sized class type in GNU C++. */
5422 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5424 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5426 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5427 if (SCALAR_TYPE_P (type))
5431 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5432 init = build_zero_init (type, NULL_TREE, false);
5434 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5436 error ("scalar object %qD requires one element in initializer",
5438 TREE_TYPE (decl) = error_mark_node;
5444 if (TREE_CODE (decl) == CONST_DECL)
5446 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5448 DECL_INITIAL (decl) = init;
5450 gcc_assert (init != NULL_TREE);
5453 else if (!init && DECL_REALLY_EXTERN (decl))
5455 else if (init || type_build_ctor_call (type)
5456 || TREE_CODE (type) == REFERENCE_TYPE)
5458 if (TREE_CODE (type) == REFERENCE_TYPE)
5460 init = grok_reference_init (decl, type, init, flags);
5461 flags |= LOOKUP_ALREADY_DIGESTED;
5464 check_for_uninitialized_const_var (decl);
5465 /* Do not reshape constructors of vectors (they don't need to be
5467 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5469 if (is_std_init_list (type))
5471 init = perform_implicit_conversion (type, init,
5472 tf_warning_or_error);
5473 flags |= LOOKUP_ALREADY_DIGESTED;
5475 else if (TYPE_NON_AGGREGATE_CLASS (type))
5477 /* Don't reshape if the class has constructors. */
5478 if (cxx_dialect == cxx98)
5479 error ("in C++98 %qD must be initialized by constructor, "
5483 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5485 error ("opaque vector types cannot be initialized");
5486 init = error_mark_node;
5490 init = reshape_init (type, init, tf_warning_or_error);
5491 if (SCALAR_TYPE_P (type))
5492 check_narrowing (type, init);
5496 /* If DECL has an array type without a specific bound, deduce the
5497 array size from the initializer. */
5498 maybe_deduce_size_from_array_init (decl, init);
5499 type = TREE_TYPE (decl);
5500 if (type == error_mark_node)
5503 if ((type_build_ctor_call (type) || CLASS_TYPE_P (type))
5504 && !(flags & LOOKUP_ALREADY_DIGESTED)
5505 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init)
5506 && CP_AGGREGATE_TYPE_P (type)))
5508 init_code = build_aggr_init_full_exprs (decl, init, flags);
5510 /* If this is a constexpr initializer, expand_default_init will
5511 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5512 case, pull the initializer back out and pass it down into
5513 store_init_value. */
5514 while (TREE_CODE (init_code) == EXPR_STMT
5515 || TREE_CODE (init_code) == CONVERT_EXPR)
5516 init_code = TREE_OPERAND (init_code, 0);
5517 if (TREE_CODE (init_code) == INIT_EXPR)
5519 init = TREE_OPERAND (init_code, 1);
5520 init_code = NULL_TREE;
5521 /* Don't call digest_init; it's unnecessary and will complain
5522 about aggregate initialization of non-aggregate classes. */
5523 flags |= LOOKUP_ALREADY_DIGESTED;
5525 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5527 /* Declared constexpr, but no suitable initializer; massage
5528 init appropriately so we can pass it into store_init_value
5530 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5531 init = finish_compound_literal (type, init,
5532 tf_warning_or_error);
5533 else if (CLASS_TYPE_P (type)
5534 && (!init || TREE_CODE (init) == TREE_LIST))
5536 init = build_functional_cast (type, init, tf_none);
5537 if (init != error_mark_node)
5538 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5540 init_code = NULL_TREE;
5546 if (init && TREE_CODE (init) != TREE_VEC)
5548 init_code = store_init_value (decl, init, cleanups, flags);
5549 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5550 && DECL_INITIAL (decl)
5551 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5552 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5553 warning (0, "array %qD initialized by parenthesized string literal %qE",
5554 decl, DECL_INITIAL (decl));
5560 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5561 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5562 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5563 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5566 check_for_uninitialized_const_var (decl);
5569 if (init && init != error_mark_node)
5570 init_code = build2 (INIT_EXPR, type, decl, init);
5573 init_code = add_stmt_to_compound (extra_init, init_code);
5575 if (init_code && DECL_IN_AGGR_P (decl))
5577 static int explained = 0;
5579 if (cxx_dialect < cxx0x)
5580 error ("initializer invalid for static member with constructor");
5582 error ("non-constant in-class initialization invalid for static "
5583 "member %qD", decl);
5586 error ("(an out of class initialization is required)");
5594 /* If DECL is not a local variable, give it RTL. */
5597 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5599 int toplev = toplevel_bindings_p ();
5601 const char *filename;
5603 /* Set the DECL_ASSEMBLER_NAME for the object. */
5606 /* The `register' keyword, when used together with an
5607 asm-specification, indicates that the variable should be
5608 placed in a particular register. */
5609 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5611 set_user_assembler_name (decl, asmspec);
5612 DECL_HARD_REGISTER (decl) = 1;
5616 if (TREE_CODE (decl) == FUNCTION_DECL
5617 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5618 set_builtin_user_assembler_name (decl, asmspec);
5619 set_user_assembler_name (decl, asmspec);
5623 /* Handle non-variables up front. */
5624 if (TREE_CODE (decl) != VAR_DECL)
5626 rest_of_decl_compilation (decl, toplev, at_eof);
5630 /* If we see a class member here, it should be a static data
5632 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5634 gcc_assert (TREE_STATIC (decl));
5635 /* An in-class declaration of a static data member should be
5636 external; it is only a declaration, and not a definition. */
5637 if (init == NULL_TREE)
5638 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5641 /* We don't create any RTL for local variables. */
5642 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5645 /* We defer emission of local statics until the corresponding
5646 DECL_EXPR is expanded. */
5647 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5649 /* We try to defer namespace-scope static constants so that they are
5650 not emitted into the object file unnecessarily. */
5651 filename = input_filename;
5652 if (!DECL_VIRTUAL_P (decl)
5653 && TREE_READONLY (decl)
5654 && DECL_INITIAL (decl) != NULL_TREE
5655 && DECL_INITIAL (decl) != error_mark_node
5657 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5659 && !TREE_PUBLIC (decl))
5661 /* Fool with the linkage of static consts according to #pragma
5663 struct c_fileinfo *finfo = get_fileinfo (filename);
5664 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5666 TREE_PUBLIC (decl) = 1;
5667 DECL_EXTERNAL (decl) = finfo->interface_only;
5672 /* Likewise for template instantiations. */
5673 else if (DECL_LANG_SPECIFIC (decl)
5674 && DECL_IMPLICIT_INSTANTIATION (decl))
5677 /* If we're not deferring, go ahead and assemble the variable. */
5679 rest_of_decl_compilation (decl, toplev, at_eof);
5682 /* walk_tree helper for wrap_temporary_cleanups, below. */
5685 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5687 /* Stop at types or full-expression boundaries. */
5688 if (TYPE_P (*stmt_p)
5689 || TREE_CODE (*stmt_p) == CLEANUP_POINT_EXPR)
5695 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5697 tree guard = (tree)data;
5698 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5700 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5701 /* Tell honor_protect_cleanup_actions to handle this as a separate
5703 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5705 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5711 /* We're initializing a local variable which has a cleanup GUARD. If there
5712 are any temporaries used in the initializer INIT of this variable, we
5713 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5714 variable will be cleaned up properly if one of them throws.
5716 Unfortunately, there's no way to express this properly in terms of
5717 nesting, as the regions for the temporaries overlap the region for the
5718 variable itself; if there are two temporaries, the variable needs to be
5719 the first thing destroyed if either of them throws. However, we only
5720 want to run the variable's cleanup if it actually got constructed. So
5721 we need to guard the temporary cleanups with the variable's cleanup if
5722 they are run on the normal path, but not if they are run on the
5723 exceptional path. We implement this by telling
5724 honor_protect_cleanup_actions to strip the variable cleanup from the
5725 exceptional path. */
5728 wrap_temporary_cleanups (tree init, tree guard)
5730 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5733 /* Generate code to initialize DECL (a local variable). */
5736 initialize_local_var (tree decl, tree init)
5738 tree type = TREE_TYPE (decl);
5742 gcc_assert (TREE_CODE (decl) == VAR_DECL
5743 || TREE_CODE (decl) == RESULT_DECL);
5744 gcc_assert (!TREE_STATIC (decl));
5746 if (DECL_SIZE (decl) == NULL_TREE)
5748 /* If we used it already as memory, it must stay in memory. */
5749 DECL_INITIAL (decl) = NULL_TREE;
5750 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5754 if (type == error_mark_node)
5757 /* Compute and store the initial value. */
5758 already_used = TREE_USED (decl) || TREE_USED (type);
5759 if (TREE_USED (type))
5760 DECL_READ_P (decl) = 1;
5762 /* Generate a cleanup, if necessary. */
5763 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5765 /* Perform the initialization. */
5768 if (TREE_CODE (init) == INIT_EXPR
5769 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init, 1)))
5771 /* Stick simple initializers in DECL_INITIAL so that
5772 -Wno-init-self works (c++/34772). */
5773 gcc_assert (TREE_OPERAND (init, 0) == decl);
5774 DECL_INITIAL (decl) = TREE_OPERAND (init, 1);
5778 int saved_stmts_are_full_exprs_p;
5780 /* If we're only initializing a single object, guard the
5781 destructors of any temporaries used in its initializer with
5782 its destructor. This isn't right for arrays because each
5783 element initialization is a full-expression. */
5784 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5785 wrap_temporary_cleanups (init, cleanup);
5787 gcc_assert (building_stmt_list_p ());
5788 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5789 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5790 finish_expr_stmt (init);
5791 current_stmt_tree ()->stmts_are_full_exprs_p =
5792 saved_stmts_are_full_exprs_p;
5796 /* Set this to 0 so we can tell whether an aggregate which was
5797 initialized was ever used. Don't do this if it has a
5798 destructor, so we don't complain about the 'resource
5799 allocation is initialization' idiom. Now set
5800 attribute((unused)) on types so decls of that type will be
5801 marked used. (see TREE_USED, above.) */
5802 if (TYPE_NEEDS_CONSTRUCTING (type)
5804 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5805 && DECL_NAME (decl))
5806 TREE_USED (decl) = 0;
5807 else if (already_used)
5808 TREE_USED (decl) = 1;
5811 finish_decl_cleanup (decl, cleanup);
5814 /* DECL is a VAR_DECL for a compiler-generated variable with static
5815 storage duration (like a virtual table) whose initializer is a
5816 compile-time constant. Initialize the variable and provide it to the
5820 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5823 gcc_assert (DECL_ARTIFICIAL (decl));
5824 init = build_constructor (TREE_TYPE (decl), v);
5825 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5826 DECL_INITIAL (decl) = init;
5827 DECL_INITIALIZED_P (decl) = 1;
5828 determine_visibility (decl);
5829 layout_var_decl (decl);
5830 maybe_commonize_var (decl);
5831 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5834 /* INIT is the initializer for a variable, as represented by the
5835 parser. Returns true iff INIT is type-dependent. */
5838 type_dependent_init_p (tree init)
5840 if (TREE_CODE (init) == TREE_LIST)
5841 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5842 return any_type_dependent_elements_p (init);
5843 else if (TREE_CODE (init) == CONSTRUCTOR)
5844 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5846 VEC(constructor_elt, gc) *elts;
5850 elts = CONSTRUCTOR_ELTS (init);
5851 nelts = VEC_length (constructor_elt, elts);
5852 for (i = 0; i < nelts; ++i)
5853 if (type_dependent_init_p (VEC_index (constructor_elt,
5858 /* It must be a simple expression, e.g., int i = 3; */
5859 return type_dependent_expression_p (init);
5864 /* INIT is the initializer for a variable, as represented by the
5865 parser. Returns true iff INIT is value-dependent. */
5868 value_dependent_init_p (tree init)
5870 if (TREE_CODE (init) == TREE_LIST)
5871 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5872 return any_value_dependent_elements_p (init);
5873 else if (TREE_CODE (init) == CONSTRUCTOR)
5874 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5876 VEC(constructor_elt, gc) *elts;
5880 elts = CONSTRUCTOR_ELTS (init);
5881 nelts = VEC_length (constructor_elt, elts);
5882 for (i = 0; i < nelts; ++i)
5883 if (value_dependent_init_p (VEC_index (constructor_elt,
5888 /* It must be a simple expression, e.g., int i = 3; */
5889 return value_dependent_expression_p (init);
5894 /* Finish processing of a declaration;
5895 install its line number and initial value.
5896 If the length of an array type is not known before,
5897 it must be determined now, from the initial value, or it is an error.
5899 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5900 true, then INIT is an integral constant expression.
5902 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5903 if the (init) syntax was used. */
5906 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5907 tree asmspec_tree, int flags)
5910 VEC(tree,gc) *cleanups = NULL;
5911 const char *asmspec = NULL;
5912 int was_readonly = 0;
5913 bool var_definition_p = false;
5916 if (decl == error_mark_node)
5921 error ("assignment (not initialization) in declaration");
5925 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5926 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5927 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5929 type = TREE_TYPE (decl);
5930 if (type == error_mark_node)
5933 /* If a name was specified, get the string. */
5934 if (at_namespace_scope_p ())
5935 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5936 if (asmspec_tree && asmspec_tree != error_mark_node)
5937 asmspec = TREE_STRING_POINTER (asmspec_tree);
5939 if (current_class_type
5940 && CP_DECL_CONTEXT (decl) == current_class_type
5941 && TYPE_BEING_DEFINED (current_class_type)
5942 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type)
5943 && (DECL_INITIAL (decl) || init))
5944 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5946 auto_node = type_uses_auto (type);
5950 if (init == NULL_TREE)
5952 error ("declaration of %q#D has no initializer", decl);
5953 TREE_TYPE (decl) = error_mark_node;
5957 if (TREE_CODE (d_init) == TREE_LIST)
5958 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5959 tf_warning_or_error);
5960 d_init = resolve_nondeduced_context (d_init);
5961 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5963 if (type == error_mark_node)
5967 if (!ensure_literal_type_for_constexpr_object (decl))
5968 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5970 if (TREE_CODE (decl) == VAR_DECL
5971 && DECL_CLASS_SCOPE_P (decl)
5972 && DECL_INITIALIZED_IN_CLASS_P (decl))
5973 check_static_variable_definition (decl, type);
5975 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5978 if (init == ridpointers[(int)RID_DELETE])
5980 /* FIXME check this is 1st decl. */
5981 DECL_DELETED_FN (decl) = 1;
5982 DECL_DECLARED_INLINE_P (decl) = 1;
5983 DECL_INITIAL (decl) = error_mark_node;
5984 FOR_EACH_CLONE (clone, decl)
5986 DECL_DELETED_FN (clone) = 1;
5987 DECL_DECLARED_INLINE_P (clone) = 1;
5988 DECL_INITIAL (clone) = error_mark_node;
5992 else if (init == ridpointers[(int)RID_DEFAULT])
5994 if (defaultable_fn_check (decl))
5995 DECL_DEFAULTED_FN (decl) = 1;
5997 DECL_INITIAL (decl) = NULL_TREE;
6001 if (init && TREE_CODE (decl) == VAR_DECL)
6003 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
6004 /* If DECL is a reference, then we want to know whether init is a
6005 reference constant; init_const_expr_p as passed tells us whether
6006 it's an rvalue constant. */
6007 if (TREE_CODE (type) == REFERENCE_TYPE)
6008 init_const_expr_p = potential_constant_expression (init);
6009 if (init_const_expr_p)
6011 /* Set these flags now for templates. We'll update the flags in
6012 store_init_value for instantiations. */
6013 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
6014 if (decl_maybe_constant_var_p (decl))
6015 TREE_CONSTANT (decl) = 1;
6019 if (processing_template_decl)
6021 bool type_dependent_p;
6023 /* Add this declaration to the statement-tree. */
6024 if (at_function_scope_p ())
6025 add_decl_expr (decl);
6027 type_dependent_p = dependent_type_p (type);
6029 if (check_for_bare_parameter_packs (init))
6032 DECL_INITIAL (decl) = NULL_TREE;
6035 /* Generally, initializers in templates are expanded when the
6036 template is instantiated. But, if DECL is a variable constant
6037 then it can be used in future constant expressions, so its value
6038 must be available. */
6040 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
6041 /* We can't do anything if the decl has dependent type. */;
6043 && init_const_expr_p
6044 && !type_dependent_p
6045 && decl_maybe_constant_var_p (decl)
6046 && !type_dependent_init_p (init)
6047 && !value_dependent_init_p (init))
6049 /* This variable seems to be a non-dependent constant, so process
6050 its initializer. If check_initializer returns non-null the
6051 initialization wasn't constant after all. */
6053 cleanups = make_tree_vector ();
6054 init_code = check_initializer (decl, init, flags, &cleanups);
6055 if (init_code == NULL_TREE)
6057 release_tree_vector (cleanups);
6059 else if (!DECL_PRETTY_FUNCTION_P (decl))
6060 /* Deduce array size even if the initializer is dependent. */
6061 maybe_deduce_size_from_array_init (decl, init);
6064 DECL_INITIAL (decl) = init;
6068 /* Just store non-static data member initializers for later. */
6069 if (init && TREE_CODE (decl) == FIELD_DECL)
6070 DECL_INITIAL (decl) = init;
6072 /* Take care of TYPE_DECLs up front. */
6073 if (TREE_CODE (decl) == TYPE_DECL)
6075 if (type != error_mark_node
6076 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
6078 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
6079 warning (0, "shadowing previous type declaration of %q#D", decl);
6080 set_identifier_type_value (DECL_NAME (decl), decl);
6083 /* If we have installed this as the canonical typedef for this
6084 type, and that type has not been defined yet, delay emitting
6085 the debug information for it, as we will emit it later. */
6086 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
6087 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
6088 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6090 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6095 /* A reference will be modified here, as it is initialized. */
6096 if (! DECL_EXTERNAL (decl)
6097 && TREE_READONLY (decl)
6098 && TREE_CODE (type) == REFERENCE_TYPE)
6101 TREE_READONLY (decl) = 0;
6104 if (TREE_CODE (decl) == VAR_DECL)
6106 /* Only variables with trivial initialization and destruction can
6107 have thread-local storage. */
6108 if (DECL_THREAD_LOCAL_P (decl)
6109 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6110 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6111 error ("%qD cannot be thread-local because it has non-trivial "
6112 "type %qT", decl, TREE_TYPE (decl));
6113 /* If this is a local variable that will need a mangled name,
6114 register it now. We must do this before processing the
6115 initializer for the variable, since the initialization might
6116 require a guard variable, and since the mangled name of the
6117 guard variable will depend on the mangled name of this
6119 if (DECL_FUNCTION_SCOPE_P (decl)
6120 && TREE_STATIC (decl)
6121 && !DECL_ARTIFICIAL (decl))
6123 push_local_name (decl);
6124 if (DECL_CONSTRUCTOR_P (current_function_decl)
6125 || DECL_DESTRUCTOR_P (current_function_decl))
6126 /* Normally local_decls is populated during GIMPLE lowering,
6127 but [cd]tors are never actually compiled directly. We need
6128 to put statics on the list so we can deal with the label
6129 address extension. */
6130 add_local_decl (cfun, decl);
6133 /* Convert the initializer to the type of DECL, if we have not
6134 already initialized DECL. */
6135 if (!DECL_INITIALIZED_P (decl)
6136 /* If !DECL_EXTERNAL then DECL is being defined. In the
6137 case of a static data member initialized inside the
6138 class-specifier, there can be an initializer even if DECL
6139 is *not* defined. */
6140 && (!DECL_EXTERNAL (decl) || init))
6142 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6145 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6146 /* Allow libjava/prims.cc define primitive classes. */
6147 if (init != NULL_TREE
6148 || jclass == NULL_TREE
6149 || TREE_CODE (jclass) != TYPE_DECL
6150 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6151 || !same_type_ignoring_top_level_qualifiers_p
6152 (type, TREE_TYPE (TREE_TYPE (jclass))))
6153 error ("Java object %qD not allocated with %<new%>", decl);
6156 cleanups = make_tree_vector ();
6157 init = check_initializer (decl, init, flags, &cleanups);
6158 /* Thread-local storage cannot be dynamically initialized. */
6159 if (DECL_THREAD_LOCAL_P (decl) && init)
6161 error ("%qD is thread-local and so cannot be dynamically "
6162 "initialized", decl);
6166 /* Check that the initializer for a static data member was a
6167 constant. Although we check in the parser that the
6168 initializer is an integral constant expression, we do not
6169 simplify division-by-zero at the point at which it
6170 occurs. Therefore, in:
6172 struct S { static const int i = 7 / 0; };
6174 we issue an error at this point. It would
6175 probably be better to forbid division by zero in
6176 integral constant expressions. */
6177 if (DECL_EXTERNAL (decl) && init)
6179 error ("%qD cannot be initialized by a non-constant expression"
6180 " when being declared", decl);
6181 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6189 The memory occupied by any object of static storage
6190 duration is zero-initialized at program startup before
6191 any other initialization takes place.
6193 We cannot create an appropriate initializer until after
6194 the type of DECL is finalized. If DECL_INITIAL is set,
6195 then the DECL is statically initialized, and any
6196 necessary zero-initialization has already been performed. */
6197 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6198 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6199 /*nelts=*/NULL_TREE,
6200 /*static_storage_p=*/true);
6201 /* Remember that the initialization for this variable has
6203 DECL_INITIALIZED_P (decl) = 1;
6204 /* This declaration is the definition of this variable,
6205 unless we are initializing a static data member within
6206 the class specifier. */
6207 if (!DECL_EXTERNAL (decl))
6208 var_definition_p = true;
6210 /* If the variable has an array type, lay out the type, even if
6211 there is no initializer. It is valid to index through the
6212 array, and we must get TYPE_ALIGN set correctly on the array
6214 else if (TREE_CODE (type) == ARRAY_TYPE)
6217 if (TREE_STATIC (decl)
6218 && !at_function_scope_p ()
6219 && current_function_decl == NULL)
6220 /* So decl is a global variable or a static member of a
6221 non local class. Record the types it uses
6222 so that we can decide later to emit debug info for them. */
6223 record_types_used_by_current_var_decl (decl);
6225 else if (TREE_CODE (decl) == FIELD_DECL
6226 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6227 error ("non-static data member %qD has Java class type", decl);
6229 /* Add this declaration to the statement-tree. This needs to happen
6230 after the call to check_initializer so that the DECL_EXPR for a
6231 reference temp is added before the DECL_EXPR for the reference itself. */
6232 if (DECL_FUNCTION_SCOPE_P (decl))
6233 add_decl_expr (decl);
6235 /* Let the middle end know about variables and functions -- but not
6236 static data members in uninstantiated class templates. */
6237 if (TREE_CODE (decl) == VAR_DECL
6238 || TREE_CODE (decl) == FUNCTION_DECL)
6240 if (TREE_CODE (decl) == VAR_DECL)
6242 layout_var_decl (decl);
6243 maybe_commonize_var (decl);
6246 /* This needs to happen after the linkage is set. */
6247 determine_visibility (decl);
6249 if (var_definition_p && TREE_STATIC (decl))
6251 /* If a TREE_READONLY variable needs initialization
6252 at runtime, it is no longer readonly and we need to
6253 avoid MEM_READONLY_P being set on RTL created for it. */
6256 if (TREE_READONLY (decl))
6257 TREE_READONLY (decl) = 0;
6260 else if (was_readonly)
6261 TREE_READONLY (decl) = 1;
6264 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6266 /* Check for abstractness of the type. Notice that there is no
6267 need to strip array types here since the check for those types
6268 is already done within create_array_type_for_decl. */
6269 if (TREE_CODE (type) == FUNCTION_TYPE
6270 || TREE_CODE (type) == METHOD_TYPE)
6271 abstract_virtuals_error (decl, TREE_TYPE (type));
6273 abstract_virtuals_error (decl, type);
6275 if (TREE_TYPE (decl) == error_mark_node)
6276 /* No initialization required. */
6278 else if (TREE_CODE (decl) == FUNCTION_DECL)
6282 if (init == ridpointers[(int)RID_DEFAULT])
6284 /* An out-of-class default definition is defined at
6285 the point where it is explicitly defaulted. */
6286 if (DECL_DELETED_FN (decl))
6287 maybe_explain_implicit_delete (decl);
6288 else if (DECL_INITIAL (decl) == error_mark_node)
6289 synthesize_method (decl);
6292 error ("function %q#D is initialized like a variable", decl);
6294 /* else no initialization required. */
6296 else if (DECL_EXTERNAL (decl)
6297 && ! (DECL_LANG_SPECIFIC (decl)
6298 && DECL_NOT_REALLY_EXTERN (decl)))
6301 DECL_INITIAL (decl) = init;
6303 /* A variable definition. */
6304 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6305 /* Initialize the local variable. */
6306 initialize_local_var (decl, init);
6308 /* If a variable is defined, and then a subsequent
6309 definition with external linkage is encountered, we will
6310 get here twice for the same variable. We want to avoid
6311 calling expand_static_init more than once. For variables
6312 that are not static data members, we can call
6313 expand_static_init only when we actually process the
6314 initializer. It is not legal to redeclare a static data
6315 member, so this issue does not arise in that case. */
6316 else if (var_definition_p && TREE_STATIC (decl))
6317 expand_static_init (decl, init);
6320 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6321 reference, insert it in the statement-tree now. */
6325 FOR_EACH_VEC_ELT (tree, cleanups, i, t)
6326 push_cleanup (decl, t, false);
6327 release_tree_vector (cleanups);
6331 TREE_READONLY (decl) = 1;
6333 invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl);
6336 /* Returns a declaration for a VAR_DECL as if:
6338 extern "C" TYPE NAME;
6340 had been seen. Used to create compiler-generated global
6344 declare_global_var (tree name, tree type)
6348 push_to_top_level ();
6349 decl = build_decl (input_location, VAR_DECL, name, type);
6350 TREE_PUBLIC (decl) = 1;
6351 DECL_EXTERNAL (decl) = 1;
6352 DECL_ARTIFICIAL (decl) = 1;
6353 /* If the user has explicitly declared this variable (perhaps
6354 because the code we are compiling is part of a low-level runtime
6355 library), then it is possible that our declaration will be merged
6356 with theirs by pushdecl. */
6357 decl = pushdecl (decl);
6358 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6359 pop_from_top_level ();
6364 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6365 if "__cxa_atexit" is not being used) corresponding to the function
6366 to be called when the program exits. */
6369 get_atexit_fn_ptr_type (void)
6373 if (!atexit_fn_ptr_type_node)
6376 if (flag_use_cxa_atexit
6377 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6378 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6379 arg_type = ptr_type_node;
6381 /* The parameter to "atexit" is "void (*)(void)". */
6382 arg_type = NULL_TREE;
6384 fn_type = build_function_type_list (void_type_node,
6385 arg_type, NULL_TREE);
6386 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6389 return atexit_fn_ptr_type_node;
6392 /* Returns a pointer to the `atexit' function. Note that if
6393 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6394 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6397 get_atexit_node (void)
6403 bool use_aeabi_atexit;
6408 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6410 /* The declaration for `__cxa_atexit' is:
6412 int __cxa_atexit (void (*)(void *), void *, void *)
6414 We build up the argument types and then the function type
6416 tree argtype0, argtype1, argtype2;
6418 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6419 /* First, build the pointer-to-function type for the first
6421 fn_ptr_type = get_atexit_fn_ptr_type ();
6422 /* Then, build the rest of the argument types. */
6423 argtype2 = ptr_type_node;
6424 if (use_aeabi_atexit)
6426 argtype1 = fn_ptr_type;
6427 argtype0 = ptr_type_node;
6431 argtype1 = ptr_type_node;
6432 argtype0 = fn_ptr_type;
6434 /* And the final __cxa_atexit type. */
6435 fn_type = build_function_type_list (integer_type_node,
6436 argtype0, argtype1, argtype2,
6438 fn_ptr_type = build_pointer_type (fn_type);
6439 if (use_aeabi_atexit)
6440 name = "__aeabi_atexit";
6442 name = "__cxa_atexit";
6446 /* The declaration for `atexit' is:
6448 int atexit (void (*)());
6450 We build up the argument types and then the function type
6452 fn_ptr_type = get_atexit_fn_ptr_type ();
6453 /* Build the final atexit type. */
6454 fn_type = build_function_type_list (integer_type_node,
6455 fn_ptr_type, NULL_TREE);
6459 /* Now, build the function declaration. */
6460 push_lang_context (lang_name_c);
6461 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6462 mark_used (atexit_fndecl);
6463 pop_lang_context ();
6464 atexit_node = decay_conversion (atexit_fndecl);
6469 /* Returns the __dso_handle VAR_DECL. */
6472 get_dso_handle_node (void)
6474 if (dso_handle_node)
6475 return dso_handle_node;
6477 /* Declare the variable. */
6478 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6481 #ifdef HAVE_GAS_HIDDEN
6482 DECL_VISIBILITY (dso_handle_node) = VISIBILITY_HIDDEN;
6483 DECL_VISIBILITY_SPECIFIED (dso_handle_node) = 1;
6486 return dso_handle_node;
6489 /* Begin a new function with internal linkage whose job will be simply
6490 to destroy some particular variable. */
6492 static GTY(()) int start_cleanup_cnt;
6495 start_cleanup_fn (void)
6500 bool use_cxa_atexit = flag_use_cxa_atexit
6501 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6503 push_to_top_level ();
6505 /* No need to mangle this. */
6506 push_lang_context (lang_name_c);
6508 /* Build the name of the function. */
6509 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6510 /* Build the function declaration. */
6511 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6512 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6513 /* It's a function with internal linkage, generated by the
6515 TREE_PUBLIC (fndecl) = 0;
6516 DECL_ARTIFICIAL (fndecl) = 1;
6517 /* Make the function `inline' so that it is only emitted if it is
6518 actually needed. It is unlikely that it will be inlined, since
6519 it is only called via a function pointer, but we avoid unnecessary
6520 emissions this way. */
6521 DECL_DECLARED_INLINE_P (fndecl) = 1;
6522 DECL_INTERFACE_KNOWN (fndecl) = 1;
6523 /* Build the parameter. */
6528 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6529 DECL_CONTEXT (parmdecl) = fndecl;
6530 TREE_USED (parmdecl) = 1;
6531 DECL_READ_P (parmdecl) = 1;
6532 DECL_ARGUMENTS (fndecl) = parmdecl;
6536 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6538 pop_lang_context ();
6540 return current_function_decl;
6543 /* Finish the cleanup function begun by start_cleanup_fn. */
6546 end_cleanup_fn (void)
6548 expand_or_defer_fn (finish_function (0));
6550 pop_from_top_level ();
6553 /* Generate code to handle the destruction of DECL, an object with
6554 static storage duration. */
6557 register_dtor_fn (tree decl)
6564 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6566 type = TREE_TYPE (decl);
6567 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6568 return void_zero_node;
6570 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6571 a class object, we can just pass the destructor to
6572 "__cxa_atexit"; we don't have to build a temporary function to do
6574 use_dtor = (flag_use_cxa_atexit
6575 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6576 && CLASS_TYPE_P (type));
6581 /* Find the destructor. */
6582 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6583 gcc_assert (idx >= 0);
6584 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6585 /* Make sure it is accessible. */
6586 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6590 /* Call build_cleanup before we enter the anonymous function so
6591 that any access checks will be done relative to the current
6592 scope, rather than the scope of the anonymous function. */
6593 build_cleanup (decl);
6595 /* Now start the function. */
6596 cleanup = start_cleanup_fn ();
6598 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6599 to the original function, rather than the anonymous one. That
6600 will make the back end think that nested functions are in use,
6601 which causes confusion. */
6602 push_deferring_access_checks (dk_no_check);
6603 fcall = build_cleanup (decl);
6604 pop_deferring_access_checks ();
6606 /* Create the body of the anonymous function. */
6607 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6608 finish_expr_stmt (fcall);
6609 finish_compound_stmt (compound_stmt);
6613 /* Call atexit with the cleanup function. */
6614 mark_used (cleanup);
6615 cleanup = build_address (cleanup);
6616 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6622 /* We must convert CLEANUP to the type that "__cxa_atexit"
6624 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6625 /* "__cxa_atexit" will pass the address of DECL to the
6626 cleanup function. */
6628 addr = build_address (decl);
6629 /* The declared type of the parameter to "__cxa_atexit" is
6630 "void *". For plain "T*", we could just let the
6631 machinery in cp_build_function_call convert it -- but if the
6632 type is "cv-qualified T *", then we need to convert it
6633 before passing it in, to avoid spurious errors. */
6634 addr = build_nop (ptr_type_node, addr);
6637 /* Since the cleanup functions we build ignore the address
6638 they're given, there's no reason to pass the actual address
6639 in, and, in general, it's cheaper to pass NULL than any
6641 addr = null_pointer_node;
6642 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6643 tf_warning_or_error);
6644 if (targetm.cxx.use_aeabi_atexit ())
6657 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6658 arg0, arg1, arg2, NULL_TREE);
6661 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6662 is its initializer. Generate code to handle the construction
6663 and destruction of DECL. */
6666 expand_static_init (tree decl, tree init)
6668 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6669 gcc_assert (TREE_STATIC (decl));
6671 /* Some variables require no dynamic initialization. */
6673 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6676 if (DECL_FUNCTION_SCOPE_P (decl))
6678 /* Emit code to perform this initialization but once. */
6679 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6680 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6681 tree guard, guard_addr;
6684 /* Emit code to perform this initialization but once. This code
6687 static <type> guard;
6688 if (!guard.first_byte) {
6689 if (__cxa_guard_acquire (&guard)) {
6692 // Do initialization.
6693 flag = true; __cxa_guard_release (&guard);
6694 // Register variable for destruction at end of program.
6696 if (!flag) __cxa_guard_abort (&guard);
6700 Note that the `flag' variable is only set to 1 *after* the
6701 initialization is complete. This ensures that an exception,
6702 thrown during the construction, will cause the variable to
6703 reinitialized when we pass through this code again, as per:
6707 If the initialization exits by throwing an exception, the
6708 initialization is not complete, so it will be tried again
6709 the next time control enters the declaration.
6711 This process should be thread-safe, too; multiple threads
6712 should not be able to initialize the variable more than
6715 /* Create the guard variable. */
6716 guard = get_guard (decl);
6718 /* This optimization isn't safe on targets with relaxed memory
6719 consistency. On such targets we force synchronization in
6720 __cxa_guard_acquire. */
6721 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6723 /* Begin the conditional initialization. */
6724 if_stmt = begin_if_stmt ();
6725 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6726 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6729 if (flag_threadsafe_statics)
6731 tree vfntype = NULL_TREE;
6732 tree acquire_name, release_name, abort_name;
6733 tree acquire_fn, release_fn, abort_fn;
6734 guard_addr = build_address (guard);
6736 acquire_name = get_identifier ("__cxa_guard_acquire");
6737 release_name = get_identifier ("__cxa_guard_release");
6738 abort_name = get_identifier ("__cxa_guard_abort");
6739 acquire_fn = identifier_global_value (acquire_name);
6740 release_fn = identifier_global_value (release_name);
6741 abort_fn = identifier_global_value (abort_name);
6743 acquire_fn = push_library_fn
6744 (acquire_name, build_function_type_list (integer_type_node,
6745 TREE_TYPE (guard_addr),
6748 if (!release_fn || !abort_fn)
6749 vfntype = build_function_type_list (void_type_node,
6750 TREE_TYPE (guard_addr),
6753 release_fn = push_library_fn (release_name, vfntype, NULL_TREE);
6755 abort_fn = push_library_fn (abort_name, vfntype, NULL_TREE);
6757 inner_if_stmt = begin_if_stmt ();
6758 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6761 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6762 begin = get_target_expr (boolean_false_node);
6763 flag = TARGET_EXPR_SLOT (begin);
6765 TARGET_EXPR_CLEANUP (begin)
6766 = build3 (COND_EXPR, void_type_node, flag,
6768 build_call_n (abort_fn, 1, guard_addr));
6769 CLEANUP_EH_ONLY (begin) = 1;
6771 /* Do the initialization itself. */
6772 init = add_stmt_to_compound (begin, init);
6773 init = add_stmt_to_compound
6774 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6775 init = add_stmt_to_compound
6776 (init, build_call_n (release_fn, 1, guard_addr));
6779 init = add_stmt_to_compound (init, set_guard (guard));
6781 /* Use atexit to register a function for destroying this static
6783 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6785 finish_expr_stmt (init);
6787 if (flag_threadsafe_statics)
6789 finish_compound_stmt (inner_then_clause);
6790 finish_then_clause (inner_if_stmt);
6791 finish_if_stmt (inner_if_stmt);
6794 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6796 finish_compound_stmt (then_clause);
6797 finish_then_clause (if_stmt);
6798 finish_if_stmt (if_stmt);
6802 static_aggregates = tree_cons (init, decl, static_aggregates);
6806 /* Make TYPE a complete type based on INITIAL_VALUE.
6807 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6808 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6809 3 if the initializer list is empty (in pedantic mode). */
6812 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6815 tree type, elt_type;
6819 unsigned HOST_WIDE_INT i;
6822 /* An array of character type can be initialized from a
6823 brace-enclosed string constant.
6825 FIXME: this code is duplicated from reshape_init. Probably
6826 we should just call reshape_init here? */
6827 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6828 && TREE_CODE (initial_value) == CONSTRUCTOR
6829 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6831 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6832 tree value = VEC_index (constructor_elt, v, 0)->value;
6834 if (TREE_CODE (value) == STRING_CST
6835 && VEC_length (constructor_elt, v) == 1)
6836 initial_value = value;
6839 /* If any of the elements are parameter packs, we can't actually
6840 complete this type now because the array size is dependent. */
6841 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6843 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6846 if (PACK_EXPANSION_P (value))
6852 failure = complete_array_type (ptype, initial_value, do_default);
6854 /* We can create the array before the element type is complete, which
6855 means that we didn't have these two bits set in the original type
6856 either. In completing the type, we are expected to propagate these
6857 bits. See also complete_type which does the same thing for arrays
6860 if (TYPE_DOMAIN (type))
6862 elt_type = TREE_TYPE (type);
6863 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6864 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6865 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6871 /* As above, but either give an error or reject zero-size arrays, depending
6875 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6876 bool do_default, tsubst_flags_t complain)
6879 bool sfinae = !(complain & tf_error);
6880 /* In SFINAE context we can't be lenient about zero-size arrays. */
6883 failure = cp_complete_array_type (ptype, initial_value, do_default);
6889 /* Not an error. */;
6890 else if (failure == 1)
6891 error ("initializer fails to determine size of %qT", *ptype);
6892 else if (failure == 2)
6895 error ("array size missing in %qT", *ptype);
6897 else if (failure == 3)
6898 error ("zero-size array %qT", *ptype);
6899 *ptype = error_mark_node;
6904 /* Return zero if something is declared to be a member of type
6905 CTYPE when in the context of CUR_TYPE. STRING is the error
6906 message to print in that case. Otherwise, quietly return 1. */
6909 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6911 if (ctype && ctype != cur_type)
6913 if (flags == DTOR_FLAG)
6914 error ("destructor for alien class %qT cannot be a member", ctype);
6916 error ("constructor for alien class %qT cannot be a member", ctype);
6922 /* Subroutine of `grokdeclarator'. */
6924 /* Generate errors possibly applicable for a given set of specifiers.
6925 This is for ARM $7.1.2. */
6928 bad_specifiers (tree object,
6929 enum bad_spec_place type,
6940 error ("%qD declared as a %<virtual%> variable", object);
6942 error ("%qD declared as an %<inline%> variable", object);
6944 error ("%<const%> and %<volatile%> function specifiers on "
6945 "%qD invalid in variable declaration", object);
6949 error ("%qD declared as a %<virtual%> parameter", object);
6951 error ("%qD declared as an %<inline%> parameter", object);
6953 error ("%<const%> and %<volatile%> function specifiers on "
6954 "%qD invalid in parameter declaration", object);
6958 error ("%qD declared as a %<virtual%> type", object);
6960 error ("%qD declared as an %<inline%> type", object);
6962 error ("%<const%> and %<volatile%> function specifiers on "
6963 "%qD invalid in type declaration", object);
6967 error ("%qD declared as a %<virtual%> field", object);
6969 error ("%qD declared as an %<inline%> field", object);
6971 error ("%<const%> and %<volatile%> function specifiers on "
6972 "%qD invalid in field declaration", object);
6978 error ("%q+D declared as a friend", object);
6980 && (TREE_CODE (object) == TYPE_DECL
6981 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6982 && !TYPE_REFFN_P (TREE_TYPE (object))
6983 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6984 error ("%q+D declared with an exception specification", object);
6987 /* DECL is a member function or static data member and is presently
6988 being defined. Check that the definition is taking place in a
6992 check_class_member_definition_namespace (tree decl)
6994 /* These checks only apply to member functions and static data
6996 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6997 || TREE_CODE (decl) == VAR_DECL);
6998 /* We check for problems with specializations in pt.c in
6999 check_specialization_namespace, where we can issue better
7001 if (processing_specialization)
7003 /* There are no restrictions on the placement of
7004 explicit instantiations. */
7005 if (processing_explicit_instantiation)
7009 A member function definition that appears outside of the
7010 class definition shall appear in a namespace scope enclosing
7011 the class definition.
7015 The definition for a static data member shall appear in a
7016 namespace scope enclosing the member's class definition. */
7017 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
7018 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
7019 decl, DECL_CONTEXT (decl));
7022 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7023 METHOD_TYPE for a non-static member function; QUALS are the
7024 cv-qualifiers that apply to the function. */
7027 build_this_parm (tree type, cp_cv_quals quals)
7032 cp_cv_quals this_quals;
7034 if (CLASS_TYPE_P (type))
7037 = cp_build_qualified_type (type, quals & ~TYPE_QUAL_RESTRICT);
7038 this_type = build_pointer_type (this_type);
7041 this_type = type_of_this_parm (type);
7042 /* The `this' parameter is implicitly `const'; it cannot be
7044 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
7045 qual_type = cp_build_qualified_type (this_type, this_quals);
7046 parm = build_artificial_parm (this_identifier, qual_type);
7047 cp_apply_type_quals_to_decl (this_quals, parm);
7051 /* DECL is a static member function. Complain if it was declared
7052 with function-cv-quals. */
7055 check_static_quals (tree decl, cp_cv_quals quals)
7057 if (quals != TYPE_UNQUALIFIED)
7058 error ("static member function %q#D declared with type qualifiers",
7062 /* CTYPE is class type, or null if non-class.
7063 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7065 DECLARATOR is the function's name.
7066 PARMS is a chain of PARM_DECLs for the function.
7067 VIRTUALP is truthvalue of whether the function is virtual or not.
7068 FLAGS are to be passed through to `grokclassfn'.
7069 QUALS are qualifiers indicating whether the function is `const'
7071 RAISES is a list of exceptions that this function can raise.
7072 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7073 not look, and -1 if we should not call `grokclassfn' at all.
7075 SFK is the kind of special function (if any) for the new function.
7077 Returns `NULL_TREE' if something goes wrong, after issuing
7078 applicable error messages. */
7081 grokfndecl (tree ctype,
7085 tree orig_declarator,
7087 enum overload_flags flags,
7094 special_function_kind sfk,
7099 location_t location)
7102 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
7106 type = build_exception_variant (type, raises);
7108 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
7110 /* If we have an explicit location, use it, otherwise use whatever
7111 build_lang_decl used (probably input_location). */
7112 if (location != UNKNOWN_LOCATION)
7113 DECL_SOURCE_LOCATION (decl) = location;
7115 if (TREE_CODE (type) == METHOD_TYPE)
7118 parm = build_this_parm (type, quals);
7119 DECL_CHAIN (parm) = parms;
7122 DECL_ARGUMENTS (decl) = parms;
7123 for (t = parms; t; t = DECL_CHAIN (t))
7124 DECL_CONTEXT (t) = decl;
7125 /* Propagate volatile out from type to decl. */
7126 if (TYPE_VOLATILE (type))
7127 TREE_THIS_VOLATILE (decl) = 1;
7129 /* Setup decl according to sfk. */
7132 case sfk_constructor:
7133 case sfk_copy_constructor:
7134 case sfk_move_constructor:
7135 DECL_CONSTRUCTOR_P (decl) = 1;
7137 case sfk_destructor:
7138 DECL_DESTRUCTOR_P (decl) = 1;
7144 /* If pointers to member functions use the least significant bit to
7145 indicate whether a function is virtual, ensure a pointer
7146 to this function will have that bit clear. */
7147 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7148 && TREE_CODE (type) == METHOD_TYPE
7149 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7150 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7153 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7157 ("defining explicit specialization %qD in friend declaration",
7161 tree fns = TREE_OPERAND (orig_declarator, 0);
7162 tree args = TREE_OPERAND (orig_declarator, 1);
7164 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7166 /* Something like `template <class T> friend void f<T>()'. */
7167 error ("invalid use of template-id %qD in declaration "
7168 "of primary template",
7174 /* A friend declaration of the form friend void f<>(). Record
7175 the information in the TEMPLATE_ID_EXPR. */
7176 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7178 if (TREE_CODE (fns) == COMPONENT_REF)
7180 /* Due to bison parser ickiness, we will have already looked
7181 up an operator_name or PFUNCNAME within the current class
7182 (see template_id in parse.y). If the current class contains
7183 such a name, we'll get a COMPONENT_REF here. Undo that. */
7185 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7186 == current_class_type);
7187 fns = TREE_OPERAND (fns, 1);
7189 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7190 || TREE_CODE (fns) == OVERLOAD);
7191 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7193 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7194 if (TREE_PURPOSE (t)
7195 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7197 error ("default arguments are not allowed in declaration "
7198 "of friend template specialization %qD",
7205 error ("%<inline%> is not allowed in declaration of friend "
7206 "template specialization %qD",
7213 /* If this decl has namespace scope, set that up. */
7215 set_decl_namespace (decl, in_namespace, friendp);
7217 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7219 /* `main' and builtins have implicit 'C' linkage. */
7220 if ((MAIN_NAME_P (declarator)
7221 || (IDENTIFIER_LENGTH (declarator) > 10
7222 && IDENTIFIER_POINTER (declarator)[0] == '_'
7223 && IDENTIFIER_POINTER (declarator)[1] == '_'
7224 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7225 && current_lang_name == lang_name_cplusplus
7226 && ctype == NULL_TREE
7227 && DECL_FILE_SCOPE_P (decl))
7228 SET_DECL_LANGUAGE (decl, lang_c);
7230 /* Should probably propagate const out from type to decl I bet (mrs). */
7233 DECL_STATIC_FUNCTION_P (decl) = 1;
7234 DECL_CONTEXT (decl) = ctype;
7239 DECL_CONTEXT (decl) = ctype;
7241 check_class_member_definition_namespace (decl);
7244 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7246 if (processing_template_decl)
7247 error ("cannot declare %<::main%> to be a template");
7249 error ("cannot declare %<::main%> to be inline");
7251 error ("cannot declare %<::main%> to be static");
7256 /* Members of anonymous types and local classes have no linkage; make
7257 them internal. If a typedef is made later, this will be changed. */
7258 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7259 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7262 if (publicp && cxx_dialect == cxx98)
7264 /* [basic.link]: A name with no linkage (notably, the name of a class
7265 or enumeration declared in a local scope) shall not be used to
7266 declare an entity with linkage.
7268 DR 757 relaxes this restriction for C++0x. */
7269 t = no_linkage_check (TREE_TYPE (decl),
7270 /*relaxed_p=*/false);
7273 if (TYPE_ANONYMOUS_P (t))
7275 if (DECL_EXTERN_C_P (decl))
7276 /* Allow this; it's pretty common in C. */;
7279 permerror (input_location, "anonymous type with no linkage "
7280 "used to declare function %q#D with linkage",
7282 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7283 permerror (input_location, "%q+#D does not refer to the unqualified "
7284 "type, so it is not used for linkage",
7289 permerror (input_location, "type %qT with no linkage used to "
7290 "declare function %q#D with linkage", t, decl);
7294 TREE_PUBLIC (decl) = publicp;
7297 DECL_INTERFACE_KNOWN (decl) = 1;
7298 DECL_NOT_REALLY_EXTERN (decl) = 1;
7301 /* If the declaration was declared inline, mark it as such. */
7303 DECL_DECLARED_INLINE_P (decl) = 1;
7305 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7307 DECL_EXTERNAL (decl) = 1;
7308 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7311 ? G_("static member function %qD cannot have cv-qualifier")
7312 : G_("non-member function %qD cannot have cv-qualifier"),
7314 quals = TYPE_UNQUALIFIED;
7317 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7318 && !grok_op_properties (decl, /*complain=*/true))
7320 else if (UDLIT_OPER_P (DECL_NAME (decl)))
7322 bool long_long_unsigned_p;
7324 const char *suffix = NULL;
7325 /* [over.literal]/6: Literal operators shall not have C linkage. */
7326 if (DECL_LANGUAGE (decl) == lang_c)
7328 error ("literal operator with C linkage");
7332 if (DECL_NAMESPACE_SCOPE_P (decl))
7334 if (!check_literal_operator_args (decl, &long_long_unsigned_p,
7337 error ("%qD has invalid argument list", decl);
7341 suffix = UDLIT_OP_SUFFIX (DECL_NAME (decl));
7342 if (long_long_unsigned_p)
7344 if (cpp_interpret_int_suffix (suffix, strlen (suffix)))
7345 warning (0, "integer suffix %<%s%>"
7346 " shadowed by implementation", suffix);
7348 else if (long_double_p)
7350 if (cpp_interpret_float_suffix (suffix, strlen (suffix)))
7351 warning (0, "floating point suffix %<%s%>"
7352 " shadowed by implementation", suffix);
7357 error ("%qD must be a non-member function", decl);
7363 /* Make the init_value nonzero so pushdecl knows this is not
7364 tentative. error_mark_node is replaced later with the BLOCK. */
7365 DECL_INITIAL (decl) = error_mark_node;
7367 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7368 TREE_NOTHROW (decl) = 1;
7370 /* Caller will do the rest of this. */
7374 if (ctype != NULL_TREE)
7375 grokclassfn (ctype, decl, flags);
7377 decl = check_explicit_specialization (orig_declarator, decl,
7380 4 * (friendp != 0));
7381 if (decl == error_mark_node)
7384 if (DECL_STATIC_FUNCTION_P (decl))
7385 check_static_quals (decl, quals);
7389 cplus_decl_attributes (&decl, *attrlist, 0);
7390 *attrlist = NULL_TREE;
7393 /* Check main's type after attributes have been applied. */
7394 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7396 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7399 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7401 error ("%<::main%> must return %<int%>");
7402 newtype = build_function_type (integer_type_node, oldtypeargs);
7403 TREE_TYPE (decl) = newtype;
7406 check_main_parameter_types (decl);
7409 if (ctype != NULL_TREE
7410 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7413 tree old_decl = check_classfn (ctype, decl,
7414 (processing_template_decl
7415 > template_class_depth (ctype))
7416 ? current_template_parms
7419 if (old_decl == error_mark_node)
7427 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7428 /* Because grokfndecl is always supposed to return a
7429 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7430 here. We depend on our callers to figure out that its
7431 really a template that's being returned. */
7432 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7434 if (DECL_STATIC_FUNCTION_P (old_decl)
7435 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7437 /* Remove the `this' parm added by grokclassfn. */
7438 revert_static_member_fn (decl);
7439 check_static_quals (decl, quals);
7441 if (DECL_ARTIFICIAL (old_decl))
7443 error ("definition of implicitly-declared %qD", old_decl);
7446 else if (DECL_DEFAULTED_FN (old_decl))
7448 error ("definition of explicitly-defaulted %q+D", decl);
7449 error ("%q+#D explicitly defaulted here", old_decl);
7453 /* Since we've smashed OLD_DECL to its
7454 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7455 if (TREE_CODE (decl) == TEMPLATE_DECL)
7456 decl = DECL_TEMPLATE_RESULT (decl);
7458 /* Attempt to merge the declarations. This can fail, in
7459 the case of some invalid specialization declarations. */
7460 pushed_scope = push_scope (ctype);
7461 ok = duplicate_decls (decl, old_decl, friendp);
7463 pop_scope (pushed_scope);
7466 error ("no %q#D member function declared in class %qT",
7474 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7477 if (ctype == NULL_TREE || check)
7481 DECL_VIRTUAL_P (decl) = 1;
7486 /* decl is a FUNCTION_DECL.
7487 specifiers are the parsed virt-specifiers.
7489 Set flags to reflect the virt-specifiers.
7494 set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
7496 if (decl == NULL_TREE)
7498 if (specifiers & VIRT_SPEC_OVERRIDE)
7499 DECL_OVERRIDE_P (decl) = 1;
7500 if (specifiers & VIRT_SPEC_FINAL)
7501 DECL_FINAL_P (decl) = 1;
7505 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7506 the linkage that DECL will receive in the object file. */
7509 set_linkage_for_static_data_member (tree decl)
7511 /* A static data member always has static storage duration and
7512 external linkage. Note that static data members are forbidden in
7513 local classes -- the only situation in which a class has
7514 non-external linkage. */
7515 TREE_PUBLIC (decl) = 1;
7516 TREE_STATIC (decl) = 1;
7517 /* For non-template classes, static data members are always put
7518 out in exactly those files where they are defined, just as
7519 with ordinary namespace-scope variables. */
7520 if (!processing_template_decl)
7521 DECL_INTERFACE_KNOWN (decl) = 1;
7524 /* Create a VAR_DECL named NAME with the indicated TYPE.
7526 If SCOPE is non-NULL, it is the class type or namespace containing
7527 the variable. If SCOPE is NULL, the variable should is created in
7528 the innermost enclosings scope. */
7531 grokvardecl (tree type,
7533 const cp_decl_specifier_seq *declspecs,
7539 tree explicit_scope;
7541 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7543 /* Compute the scope in which to place the variable, but remember
7544 whether or not that scope was explicitly specified by the user. */
7545 explicit_scope = scope;
7548 /* An explicit "extern" specifier indicates a namespace-scope
7550 if (declspecs->storage_class == sc_extern)
7551 scope = current_decl_namespace ();
7552 else if (!at_function_scope_p ())
7553 scope = current_scope ();
7557 && (/* If the variable is a namespace-scope variable declared in a
7558 template, we need DECL_LANG_SPECIFIC. */
7559 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7560 /* Similarly for namespace-scope variables with language linkage
7562 || (TREE_CODE (scope) == NAMESPACE_DECL
7563 && current_lang_name != lang_name_cplusplus)
7564 /* Similarly for static data members. */
7566 decl = build_lang_decl (VAR_DECL, name, type);
7568 decl = build_decl (input_location, VAR_DECL, name, type);
7570 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7571 set_decl_namespace (decl, explicit_scope, 0);
7573 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7575 if (declspecs->storage_class == sc_extern)
7577 DECL_THIS_EXTERN (decl) = 1;
7578 DECL_EXTERNAL (decl) = !initialized;
7581 if (DECL_CLASS_SCOPE_P (decl))
7583 set_linkage_for_static_data_member (decl);
7584 /* This function is only called with out-of-class definitions. */
7585 DECL_EXTERNAL (decl) = 0;
7586 check_class_member_definition_namespace (decl);
7588 /* At top level, either `static' or no s.c. makes a definition
7589 (perhaps tentative), and absence of `static' makes it public. */
7590 else if (toplevel_bindings_p ())
7592 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7593 && (DECL_THIS_EXTERN (decl) || ! constp));
7594 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7596 /* Not at top level, only `static' makes a static definition. */
7599 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7600 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7603 if (declspecs->specs[(int)ds_thread])
7604 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7606 /* If the type of the decl has no linkage, make sure that we'll
7607 notice that in mark_used. */
7608 if (cxx_dialect > cxx98
7609 && decl_linkage (decl) != lk_none
7610 && DECL_LANG_SPECIFIC (decl) == NULL
7611 && !DECL_EXTERN_C_P (decl)
7612 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7613 retrofit_lang_decl (decl);
7615 if (TREE_PUBLIC (decl))
7617 /* [basic.link]: A name with no linkage (notably, the name of a class
7618 or enumeration declared in a local scope) shall not be used to
7619 declare an entity with linkage.
7621 DR 757 relaxes this restriction for C++0x. */
7622 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7623 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7626 if (TYPE_ANONYMOUS_P (t))
7628 if (DECL_EXTERN_C_P (decl))
7629 /* Allow this; it's pretty common in C. */
7633 /* DRs 132, 319 and 389 seem to indicate types with
7634 no linkage can only be used to declare extern "C"
7635 entities. Since it's not always an error in the
7636 ISO C++ 90 Standard, we only issue a warning. */
7637 warning (0, "anonymous type with no linkage used to declare "
7638 "variable %q#D with linkage", decl);
7639 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7640 warning (0, "%q+#D does not refer to the unqualified "
7641 "type, so it is not used for linkage",
7646 warning (0, "type %qT with no linkage used to declare variable "
7647 "%q#D with linkage", t, decl);
7651 DECL_INTERFACE_KNOWN (decl) = 1;
7656 /* Create and return a canonical pointer to member function type, for
7657 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7660 build_ptrmemfunc_type (tree type)
7664 tree unqualified_variant = NULL_TREE;
7666 if (type == error_mark_node)
7669 /* If a canonical type already exists for this type, use it. We use
7670 this method instead of type_hash_canon, because it only does a
7671 simple equality check on the list of field members. */
7673 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7676 /* Make sure that we always have the unqualified pointer-to-member
7678 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7680 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7682 t = make_class_type (RECORD_TYPE);
7683 xref_basetypes (t, NULL_TREE);
7685 /* Let the front end know this is a pointer to member function... */
7686 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7687 /* ... and not really a class type. */
7688 SET_CLASS_TYPE_P (t, 0);
7690 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7693 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7695 DECL_CHAIN (field) = fields;
7698 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7700 /* Zap out the name so that the back end will give us the debugging
7701 information for this anonymous RECORD_TYPE. */
7702 TYPE_NAME (t) = NULL_TREE;
7704 /* If this is not the unqualified form of this pointer-to-member
7705 type, set the TYPE_MAIN_VARIANT for this type to be the
7706 unqualified type. Since they are actually RECORD_TYPEs that are
7707 not variants of each other, we must do this manually.
7708 As we just built a new type there is no need to do yet another copy. */
7709 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7711 int type_quals = cp_type_quals (type);
7712 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7713 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7714 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7715 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7716 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7717 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7718 TREE_TYPE (TYPE_BINFO (t)) = t;
7721 /* Cache this pointer-to-member type so that we can find it again
7723 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7725 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7726 SET_TYPE_STRUCTURAL_EQUALITY (t);
7727 else if (TYPE_CANONICAL (type) != type)
7728 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7733 /* Create and return a pointer to data member type. */
7736 build_ptrmem_type (tree class_type, tree member_type)
7738 if (TREE_CODE (member_type) == METHOD_TYPE)
7740 cp_cv_quals quals = type_memfn_quals (member_type);
7741 member_type = build_memfn_type (member_type, class_type, quals);
7742 return build_ptrmemfunc_type (build_pointer_type (member_type));
7746 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7747 return build_offset_type (class_type, member_type);
7751 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7752 Check to see that the definition is valid. Issue appropriate error
7753 messages. Return 1 if the definition is particularly bad, or 0
7757 check_static_variable_definition (tree decl, tree type)
7759 /* Can't check yet if we don't know the type. */
7760 if (dependent_type_p (type))
7762 /* If DECL is declared constexpr, we'll do the appropriate checks
7763 in check_initializer. */
7764 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7766 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7768 if (literal_type_p (type))
7769 permerror (input_location,
7770 "%<constexpr%> needed for in-class initialization of "
7771 "static data member %q#D of non-integral type", decl);
7773 error ("in-class initialization of static data member %q#D of "
7774 "non-literal type", decl);
7778 /* Motion 10 at San Diego: If a static const integral data member is
7779 initialized with an integral constant expression, the initializer
7780 may appear either in the declaration (within the class), or in
7781 the definition, but not both. If it appears in the class, the
7782 member is a member constant. The file-scope definition is always
7784 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7786 error ("invalid in-class initialization of static data member "
7787 "of non-integral type %qT",
7791 else if (!CP_TYPE_CONST_P (type))
7792 error ("ISO C++ forbids in-class initialization of non-const "
7793 "static member %qD",
7795 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7796 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7797 "%qD of non-integral type %qT", decl, type);
7802 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7803 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7804 expressions out into temporary variables so that walk_tree doesn't
7805 step into them (c++/15764). */
7808 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7810 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7811 tree expr = *expr_p;
7812 if (TREE_CODE (expr) == SAVE_EXPR)
7814 tree op = TREE_OPERAND (expr, 0);
7815 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7816 if (TREE_SIDE_EFFECTS (op))
7817 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7820 else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
7825 /* Entry point for the above. */
7828 stabilize_vla_size (tree size)
7830 struct pointer_set_t *pset = pointer_set_create ();
7831 /* Break out any function calls into temporary variables. */
7832 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7835 /* Given the SIZE (i.e., number of elements) in an array, compute an
7836 appropriate index type for the array. If non-NULL, NAME is the
7837 name of the thing being declared. */
7840 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7845 tree abi_1_itype = NULL_TREE;
7847 if (error_operand_p (size))
7848 return error_mark_node;
7850 type = TREE_TYPE (size);
7851 /* type_dependent_expression_p? */
7852 if (!dependent_type_p (type))
7854 mark_rvalue_use (size);
7856 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7857 && TREE_SIDE_EFFECTS (size))
7858 /* In C++98, we mark a non-constant array bound with a magic
7859 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7862 size = fold_non_dependent_expr (size);
7864 if (CLASS_TYPE_P (type)
7865 && CLASSTYPE_LITERAL_P (type))
7867 size = build_expr_type_conversion (WANT_INT, size, true);
7870 if (!(complain & tf_error))
7871 return error_mark_node;
7873 error ("size of array %qD has non-integral type %qT",
7876 error ("size of array has non-integral type %qT", type);
7877 size = integer_one_node;
7879 if (size == error_mark_node)
7880 return error_mark_node;
7881 type = TREE_TYPE (size);
7882 /* We didn't support this case in GCC 3.2, so don't bother
7883 trying to model it now in ABI v1. */
7884 abi_1_itype = error_mark_node;
7887 size = maybe_constant_value (size);
7888 if (!TREE_CONSTANT (size))
7892 if (error_operand_p (size))
7893 return error_mark_node;
7895 /* The array bound must be an integer type. */
7896 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7898 if (!(complain & tf_error))
7899 return error_mark_node;
7901 error ("size of array %qD has non-integral type %qT", name, type);
7903 error ("size of array has non-integral type %qT", type);
7904 size = integer_one_node;
7905 type = TREE_TYPE (size);
7909 /* A type is dependent if it is...an array type constructed from any
7910 dependent type or whose size is specified by a constant expression
7911 that is value-dependent. */
7912 /* We can only call value_dependent_expression_p on integral constant
7913 expressions; treat non-constant expressions as dependent, too. */
7914 if (processing_template_decl
7915 && (dependent_type_p (type)
7916 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7918 /* We cannot do any checking for a SIZE that isn't known to be
7919 constant. Just build the index type and mark that it requires
7920 structural equality checks. */
7921 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7922 size, integer_one_node));
7923 TYPE_DEPENDENT_P (itype) = 1;
7924 TYPE_DEPENDENT_P_VALID (itype) = 1;
7925 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7929 if (!abi_version_at_least (2) && processing_template_decl
7930 && abi_1_itype == NULL_TREE)
7931 /* For abi-1, we handled all instances in templates the same way,
7932 even when they were non-dependent. This affects the manglings
7933 produced. So, we do the normal checking for non-dependent
7934 sizes, but at the end we'll return the same type that abi-1
7935 would have, but with TYPE_CANONICAL set to the "right"
7936 value that the current ABI would provide. */
7937 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7938 osize, integer_one_node));
7940 /* Normally, the array-bound will be a constant. */
7941 if (TREE_CODE (size) == INTEGER_CST)
7943 /* Check to see if the array bound overflowed. Make that an
7944 error, no matter how generous we're being. */
7945 constant_expression_error (size);
7947 /* An array must have a positive number of elements. */
7948 if (INT_CST_LT (size, integer_zero_node))
7950 if (!(complain & tf_error))
7951 return error_mark_node;
7953 error ("size of array %qD is negative", name);
7955 error ("size of array is negative");
7956 size = integer_one_node;
7958 /* As an extension we allow zero-sized arrays. */
7959 else if (integer_zerop (size))
7961 if (!(complain & tf_error))
7962 /* We must fail if performing argument deduction (as
7963 indicated by the state of complain), so that
7964 another substitution can be found. */
7965 return error_mark_node;
7966 else if (in_system_header)
7967 /* Allow them in system headers because glibc uses them. */;
7969 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7971 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7974 else if (TREE_CONSTANT (size)
7975 /* We don't allow VLAs at non-function scopes, or during
7976 tentative template substitution. */
7977 || !at_function_scope_p () || !(complain & tf_error))
7979 if (!(complain & tf_error))
7980 return error_mark_node;
7981 /* `(int) &fn' is not a valid array bound. */
7983 error ("size of array %qD is not an integral constant-expression",
7986 error ("size of array is not an integral constant-expression");
7987 size = integer_one_node;
7989 else if (pedantic && warn_vla != 0)
7992 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7994 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7996 else if (warn_vla > 0)
8000 "variable length array %qD is used", name);
8003 "variable length array is used");
8006 if (processing_template_decl && !TREE_CONSTANT (size))
8007 /* A variable sized array. */
8008 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
8011 HOST_WIDE_INT saved_processing_template_decl;
8013 /* Compute the index of the largest element in the array. It is
8014 one less than the number of elements in the array. We save
8015 and restore PROCESSING_TEMPLATE_DECL so that computations in
8016 cp_build_binary_op will be appropriately folded. */
8017 saved_processing_template_decl = processing_template_decl;
8018 processing_template_decl = 0;
8019 itype = cp_build_binary_op (input_location,
8021 cp_convert (ssizetype, size),
8022 cp_convert (ssizetype, integer_one_node),
8023 tf_warning_or_error);
8024 itype = fold (itype);
8025 processing_template_decl = saved_processing_template_decl;
8027 if (!TREE_CONSTANT (itype))
8028 /* A variable sized array. */
8029 itype = variable_size (itype);
8030 /* Make sure that there was no overflow when creating to a signed
8031 index type. (For example, on a 32-bit machine, an array with
8032 size 2^32 - 1 is too big.) */
8033 else if (TREE_CODE (itype) == INTEGER_CST
8034 && TREE_OVERFLOW (itype))
8036 if (!(complain & tf_error))
8037 return error_mark_node;
8038 error ("overflow in array dimension");
8039 TREE_OVERFLOW (itype) = 0;
8043 /* Create and return the appropriate index type. */
8044 if (abi_1_itype && abi_1_itype != error_mark_node)
8046 tree t = build_index_type (itype);
8047 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
8048 itype = abi_1_itype;
8051 itype = build_index_type (itype);
8053 /* If the index type were dependent, we would have returned early, so
8054 remember that it isn't. */
8055 TYPE_DEPENDENT_P (itype) = 0;
8056 TYPE_DEPENDENT_P_VALID (itype) = 1;
8060 /* Returns the scope (if any) in which the entity declared by
8061 DECLARATOR will be located. If the entity was declared with an
8062 unqualified name, NULL_TREE is returned. */
8065 get_scope_of_declarator (const cp_declarator *declarator)
8067 while (declarator && declarator->kind != cdk_id)
8068 declarator = declarator->declarator;
8070 /* If the declarator-id is a SCOPE_REF, the scope in which the
8071 declaration occurs is the first operand. */
8073 && declarator->u.id.qualifying_scope)
8074 return declarator->u.id.qualifying_scope;
8076 /* Otherwise, the declarator is not a qualified name; the entity will
8077 be declared in the current scope. */
8081 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8082 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8086 create_array_type_for_decl (tree name, tree type, tree size)
8088 tree itype = NULL_TREE;
8090 /* If things have already gone awry, bail now. */
8091 if (type == error_mark_node || size == error_mark_node)
8092 return error_mark_node;
8094 /* 8.3.4/1: If the type of the identifier of D contains the auto
8095 type-specifier, the program is ill-formed. */
8096 if (pedantic && type_uses_auto (type))
8097 pedwarn (input_location, OPT_pedantic,
8098 "declaration of %qD as array of %<auto%>", name);
8100 /* If there are some types which cannot be array elements,
8101 issue an error-message and return. */
8102 switch (TREE_CODE (type))
8106 error ("declaration of %qD as array of void", name);
8108 error ("creating array of void");
8109 return error_mark_node;
8113 error ("declaration of %qD as array of functions", name);
8115 error ("creating array of functions");
8116 return error_mark_node;
8118 case REFERENCE_TYPE:
8120 error ("declaration of %qD as array of references", name);
8122 error ("creating array of references");
8123 return error_mark_node;
8127 error ("declaration of %qD as array of function members", name);
8129 error ("creating array of function members");
8130 return error_mark_node;
8138 The constant expressions that specify the bounds of the arrays
8139 can be omitted only for the first member of the sequence. */
8140 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
8143 error ("declaration of %qD as multidimensional array must "
8144 "have bounds for all dimensions except the first",
8147 error ("multidimensional array must have bounds for all "
8148 "dimensions except the first");
8150 return error_mark_node;
8153 /* Figure out the index type for the array. */
8155 itype = compute_array_index_type (name, size, tf_warning_or_error);
8158 T is called the array element type; this type shall not be [...] an
8159 abstract class type. */
8160 abstract_virtuals_error (name, type);
8162 return build_cplus_array_type (type, itype);
8165 /* Check that it's OK to declare a function with the indicated TYPE.
8166 SFK indicates the kind of special function (if any) that this
8167 function is. OPTYPE is the type given in a conversion operator
8168 declaration, or the class type for a constructor/destructor.
8169 Returns the actual return type of the function; that
8170 may be different than TYPE if an error occurs, or for certain
8171 special functions. */
8174 check_special_function_return_type (special_function_kind sfk,
8180 case sfk_constructor:
8182 error ("return type specification for constructor invalid");
8184 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8185 type = build_pointer_type (optype);
8187 type = void_type_node;
8190 case sfk_destructor:
8192 error ("return type specification for destructor invalid");
8193 /* We can't use the proper return type here because we run into
8194 problems with ambiguous bases and covariant returns.
8195 Java classes are left unchanged because (void *) isn't a valid
8196 Java type, and we don't want to change the Java ABI. */
8197 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8198 type = build_pointer_type (void_type_node);
8200 type = void_type_node;
8203 case sfk_conversion:
8205 error ("return type specified for %<operator %T%>", optype);
8216 /* A variable or data member (whose unqualified name is IDENTIFIER)
8217 has been declared with the indicated TYPE. If the TYPE is not
8218 acceptable, issue an error message and return a type to use for
8219 error-recovery purposes. */
8222 check_var_type (tree identifier, tree type)
8224 if (VOID_TYPE_P (type))
8227 error ("unnamed variable or field declared void");
8228 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8230 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8231 error ("variable or field %qE declared void", identifier);
8234 error ("variable or field declared void");
8235 type = error_mark_node;
8241 /* Given declspecs and a declarator (abstract or otherwise), determine
8242 the name and type of the object declared and construct a DECL node
8245 DECLSPECS points to the representation of declaration-specifier
8246 sequence that precedes declarator.
8248 DECL_CONTEXT says which syntactic context this declaration is in:
8249 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8250 FUNCDEF for a function definition. Like NORMAL but a few different
8251 error messages in each case. Return value may be zero meaning
8252 this definition is too screwy to try to parse.
8253 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8254 handle member functions (which have FIELD context).
8255 Return value may be zero meaning this definition is too screwy to
8257 PARM for a parameter declaration (either within a function prototype
8258 or before a function body). Make a PARM_DECL, or return void_type_node.
8259 TPARM for a template parameter declaration.
8260 CATCHPARM for a parameter declaration before a catch clause.
8261 TYPENAME if for a typename (in a cast or sizeof).
8262 Don't make a DECL node; just return the ..._TYPE node.
8263 FIELD for a struct or union field; make a FIELD_DECL.
8264 BITFIELD for a field with specified width.
8266 INITIALIZED is as for start_decl.
8268 ATTRLIST is a pointer to the list of attributes, which may be NULL
8269 if there are none; *ATTRLIST may be modified if attributes from inside
8270 the declarator should be applied to the declaration.
8272 When this function is called, scoping variables (such as
8273 CURRENT_CLASS_TYPE) should reflect the scope in which the
8274 declaration occurs, not the scope in which the new declaration will
8275 be placed. For example, on:
8279 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8282 Returns a DECL (if a declarator is present), a TYPE (if there is no
8283 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8287 grokdeclarator (const cp_declarator *declarator,
8288 const cp_decl_specifier_seq *declspecs,
8289 enum decl_context decl_context,
8293 tree type = NULL_TREE;
8295 int explicit_int128 = 0;
8296 int virtualp, explicitp, friendp, inlinep, staticp;
8297 int explicit_int = 0;
8298 int explicit_char = 0;
8299 int defaulted_int = 0;
8300 tree dependent_name = NULL_TREE;
8302 tree typedef_decl = NULL_TREE;
8303 const char *name = NULL;
8304 tree typedef_type = NULL_TREE;
8305 /* True if this declarator is a function definition. */
8306 bool funcdef_flag = false;
8307 cp_declarator_kind innermost_code = cdk_error;
8310 /* See the code below that used this. */
8311 tree decl_attr = NULL_TREE;
8314 /* Keep track of what sort of function is being processed
8315 so that we can warn about default return values, or explicit
8316 return values which do not match prescribed defaults. */
8317 special_function_kind sfk = sfk_none;
8319 tree dname = NULL_TREE;
8320 tree ctor_return_type = NULL_TREE;
8321 enum overload_flags flags = NO_SPECIAL;
8322 /* cv-qualifiers that apply to the declarator, for a declaration of
8323 a member function. */
8324 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8325 /* virt-specifiers that apply to the declarator, for a declaration of
8326 a member function. */
8327 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
8328 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8330 tree raises = NULL_TREE;
8331 int template_count = 0;
8332 tree returned_attrs = NULL_TREE;
8333 tree parms = NULL_TREE;
8334 const cp_declarator *id_declarator;
8335 /* The unqualified name of the declarator; either an
8336 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8337 tree unqualified_id;
8338 /* The class type, if any, in which this entity is located,
8339 or NULL_TREE if none. Note that this value may be different from
8340 the current class type; for example if an attempt is made to declare
8341 "A::f" inside "B", this value will be "A". */
8342 tree ctype = current_class_type;
8343 /* The NAMESPACE_DECL for the namespace in which this entity is
8344 located. If an unqualified name is used to declare the entity,
8345 this value will be NULL_TREE, even if the entity is located at
8347 tree in_namespace = NULL_TREE;
8348 cp_storage_class storage_class;
8349 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8350 bool type_was_error_mark_node = false;
8351 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8352 bool template_type_arg = false;
8353 bool template_parm_flag = false;
8354 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8357 signed_p = declspecs->specs[(int)ds_signed];
8358 unsigned_p = declspecs->specs[(int)ds_unsigned];
8359 short_p = declspecs->specs[(int)ds_short];
8360 long_p = declspecs->specs[(int)ds_long];
8361 longlong = declspecs->specs[(int)ds_long] >= 2;
8362 explicit_int128 = declspecs->explicit_int128_p;
8363 thread_p = declspecs->specs[(int)ds_thread];
8365 if (decl_context == FUNCDEF)
8366 funcdef_flag = true, decl_context = NORMAL;
8367 else if (decl_context == MEMFUNCDEF)
8368 funcdef_flag = true, decl_context = FIELD;
8369 else if (decl_context == BITFIELD)
8370 bitfield = 1, decl_context = FIELD;
8371 else if (decl_context == TEMPLATE_TYPE_ARG)
8372 template_type_arg = true, decl_context = TYPENAME;
8373 else if (decl_context == TPARM)
8374 template_parm_flag = true, decl_context = PARM;
8376 if (initialized > 1)
8377 funcdef_flag = true;
8379 /* Look inside a declarator for the name being declared
8380 and get it as a string, for an error message. */
8381 for (id_declarator = declarator;
8383 id_declarator = id_declarator->declarator)
8385 if (id_declarator->kind != cdk_id)
8386 innermost_code = id_declarator->kind;
8388 switch (id_declarator->kind)
8391 if (id_declarator->declarator
8392 && id_declarator->declarator->kind == cdk_id)
8394 sfk = id_declarator->declarator->u.id.sfk;
8395 if (sfk == sfk_destructor)
8402 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8403 tree decl = id_declarator->u.id.unqualified_name;
8406 if (qualifying_scope)
8408 if (at_function_scope_p ())
8412 A declarator-id shall not be qualified except
8415 None of the cases are permitted in block
8417 if (qualifying_scope == global_namespace)
8418 error ("invalid use of qualified-name %<::%D%>",
8420 else if (TYPE_P (qualifying_scope))
8421 error ("invalid use of qualified-name %<%T::%D%>",
8422 qualifying_scope, decl);
8424 error ("invalid use of qualified-name %<%D::%D%>",
8425 qualifying_scope, decl);
8426 return error_mark_node;
8428 else if (TYPE_P (qualifying_scope))
8430 ctype = qualifying_scope;
8431 if (!MAYBE_CLASS_TYPE_P (ctype))
8433 error ("%q#T is not a class or a namespace", ctype);
8436 else if (innermost_code != cdk_function
8437 && current_class_type
8438 && !UNIQUELY_DERIVED_FROM_P (ctype,
8439 current_class_type))
8441 error ("type %qT is not derived from type %qT",
8442 ctype, current_class_type);
8443 return error_mark_node;
8446 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8447 in_namespace = qualifying_scope;
8449 switch (TREE_CODE (decl))
8455 if (innermost_code != cdk_function)
8457 error ("declaration of %qD as non-function", decl);
8458 return error_mark_node;
8460 else if (!qualifying_scope
8461 && !(current_class_type && at_class_scope_p ()))
8463 error ("declaration of %qD as non-member", decl);
8464 return error_mark_node;
8467 type = TREE_OPERAND (decl, 0);
8469 type = constructor_name (type);
8470 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8475 case TEMPLATE_ID_EXPR:
8477 tree fns = TREE_OPERAND (decl, 0);
8480 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8482 gcc_assert (is_overloaded_fn (dname));
8483 dname = DECL_NAME (get_first_fn (dname));
8488 case IDENTIFIER_NODE:
8489 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8492 if (C_IS_RESERVED_WORD (dname))
8494 error ("declarator-id missing; using reserved word %qD",
8496 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8498 else if (!IDENTIFIER_TYPENAME_P (dname))
8499 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8502 gcc_assert (flags == NO_SPECIAL);
8503 flags = TYPENAME_FLAG;
8504 ctor_return_type = TREE_TYPE (dname);
8505 sfk = sfk_conversion;
8506 if (is_typename_at_global_scope (dname))
8507 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8509 name = "<invalid operator>";
8526 return error_mark_node;
8531 if (id_declarator->kind == cdk_id)
8537 The declarator in a function-definition shall have the form
8538 D1 ( parameter-declaration-clause) ... */
8539 if (funcdef_flag && innermost_code != cdk_function)
8541 error ("function definition does not declare parameters");
8542 return error_mark_node;
8545 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8546 && innermost_code != cdk_function
8547 && ! (ctype && !declspecs->any_specifiers_p))
8549 error ("declaration of %qD as non-function", dname);
8550 return error_mark_node;
8554 && TREE_CODE (dname) == IDENTIFIER_NODE
8555 && UDLIT_OPER_P (dname)
8556 && innermost_code != cdk_function)
8558 error ("declaration of %qD as non-function", dname);
8559 return error_mark_node;
8562 if (dname && IDENTIFIER_OPNAME_P (dname))
8564 if (declspecs->specs[(int)ds_typedef])
8566 error ("declaration of %qD as %<typedef%>", dname);
8567 return error_mark_node;
8569 else if (decl_context == PARM || decl_context == CATCHPARM)
8571 error ("declaration of %qD as parameter", dname);
8572 return error_mark_node;
8576 /* Anything declared one level down from the top level
8577 must be one of the parameters of a function
8578 (because the body is at least two levels down). */
8580 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8581 by not allowing C++ class definitions to specify their parameters
8582 with xdecls (must be spec.d in the parmlist).
8584 Since we now wait to push a class scope until we are sure that
8585 we are in a legitimate method context, we must set oldcname
8586 explicitly (since current_class_name is not yet alive).
8588 We also want to avoid calling this a PARM if it is in a namespace. */
8590 if (decl_context == NORMAL && !toplevel_bindings_p ())
8592 cp_binding_level *b = current_binding_level;
8593 current_binding_level = b->level_chain;
8594 if (current_binding_level != 0 && toplevel_bindings_p ())
8595 decl_context = PARM;
8596 current_binding_level = b;
8600 name = decl_context == PARM ? "parameter" : "type name";
8602 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8604 error ("%<constexpr%> cannot appear in a typedef declaration");
8605 return error_mark_node;
8608 /* If there were multiple types specified in the decl-specifier-seq,
8609 issue an error message. */
8610 if (declspecs->multiple_types_p)
8612 error ("two or more data types in declaration of %qs", name);
8613 return error_mark_node;
8616 if (declspecs->conflicting_specifiers_p)
8618 error ("conflicting specifiers in declaration of %qs", name);
8619 return error_mark_node;
8622 /* Extract the basic type from the decl-specifier-seq. */
8623 type = declspecs->type;
8624 if (type == error_mark_node)
8627 type_was_error_mark_node = true;
8629 /* If the entire declaration is itself tagged as deprecated then
8630 suppress reports of deprecated items. */
8631 if (type && TREE_DEPRECATED (type)
8632 && deprecated_state != DEPRECATED_SUPPRESS)
8633 warn_deprecated_use (type, NULL_TREE);
8634 if (type && TREE_CODE (type) == TYPE_DECL)
8636 typedef_decl = type;
8637 type = TREE_TYPE (typedef_decl);
8638 if (TREE_DEPRECATED (type)
8639 && DECL_ARTIFICIAL (typedef_decl)
8640 && deprecated_state != DEPRECATED_SUPPRESS)
8641 warn_deprecated_use (type, NULL_TREE);
8643 /* No type at all: default to `int', and set DEFAULTED_INT
8644 because it was not a user-defined typedef. */
8645 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8647 /* These imply 'int'. */
8648 type = integer_type_node;
8652 explicit_int = declspecs->explicit_int_p;
8653 explicit_char = declspecs->explicit_char_p;
8656 /* See the code below that used this. */
8658 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8660 typedef_type = type;
8663 if (sfk != sfk_conversion)
8664 ctor_return_type = ctype;
8666 if (sfk != sfk_none)
8667 type = check_special_function_return_type (sfk, type,
8669 else if (type == NULL_TREE)
8675 /* We handle `main' specially here, because 'main () { }' is so
8676 common. With no options, it is allowed. With -Wreturn-type,
8677 it is a warning. It is only an error with -pedantic-errors. */
8678 is_main = (funcdef_flag
8679 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8680 && MAIN_NAME_P (dname)
8681 && ctype == NULL_TREE
8682 && in_namespace == NULL_TREE
8683 && current_namespace == global_namespace);
8685 if (type_was_error_mark_node)
8686 /* We've already issued an error, don't complain more. */;
8687 else if (in_system_header || flag_ms_extensions)
8688 /* Allow it, sigh. */;
8690 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8692 pedwarn (input_location, OPT_pedantic,
8693 "ISO C++ forbids declaration of %qs with no type", name);
8695 warning (OPT_Wreturn_type,
8696 "ISO C++ forbids declaration of %qs with no type", name);
8698 type = integer_type_node;
8703 if (explicit_int128)
8705 if (int128_integer_type_node == NULL_TREE)
8707 error ("%<__int128%> is not supported by this target");
8708 explicit_int128 = false;
8710 else if (pedantic && ! in_system_header)
8711 pedwarn (input_location, OPT_pedantic,
8712 "ISO C++ does not support %<__int128%> for %qs", name);
8715 /* Now process the modifiers that were specified
8716 and check for invalid combinations. */
8718 /* Long double is a special combination. */
8719 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8722 type = cp_build_qualified_type (long_double_type_node,
8723 cp_type_quals (type));
8726 /* Check all other uses of type modifiers. */
8728 if (unsigned_p || signed_p || long_p || short_p)
8732 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8733 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8734 else if (signed_p && unsigned_p)
8735 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8736 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8737 error ("%<long long%> invalid for %qs", name);
8738 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8739 error ("%<long%> invalid for %qs", name);
8740 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8741 error ("%<short%> invalid for %qs", name);
8742 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8743 error ("%<long%> or %<short%> invalid for %qs", name);
8744 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8745 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8746 else if ((long_p || short_p) && explicit_char)
8747 error ("%<long%> or %<short%> specified with char for %qs", name);
8748 else if (long_p && short_p)
8749 error ("%<long%> and %<short%> specified together for %qs", name);
8750 else if (type == char16_type_node || type == char32_type_node)
8752 if (signed_p || unsigned_p)
8753 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8754 else if (short_p || long_p)
8755 error ("%<short%> or %<long%> invalid for %qs", name);
8760 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8762 pedwarn (input_location, OPT_pedantic,
8763 "long, short, signed or unsigned used invalidly for %qs",
8765 if (flag_pedantic_errors)
8770 /* Discard the type modifiers if they are invalid. */
8781 /* Decide whether an integer type is signed or not.
8782 Optionally treat bitfields as signed by default. */
8786 It is implementation-defined whether a plain (neither
8787 explicitly signed or unsigned) char, short, int, or long
8788 bit-field is signed or unsigned.
8790 Naturally, we extend this to long long as well. Note that
8791 this does not include wchar_t. */
8792 || (bitfield && !flag_signed_bitfields
8794 /* A typedef for plain `int' without `signed' can be
8795 controlled just like plain `int', but a typedef for
8796 `signed int' cannot be so controlled. */
8798 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8799 && TREE_CODE (type) == INTEGER_TYPE
8800 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8802 if (explicit_int128)
8803 type = int128_unsigned_type_node;
8805 type = long_long_unsigned_type_node;
8807 type = long_unsigned_type_node;
8809 type = short_unsigned_type_node;
8810 else if (type == char_type_node)
8811 type = unsigned_char_type_node;
8812 else if (typedef_decl)
8813 type = unsigned_type_for (type);
8815 type = unsigned_type_node;
8817 else if (signed_p && type == char_type_node)
8818 type = signed_char_type_node;
8819 else if (explicit_int128)
8820 type = int128_integer_type_node;
8822 type = long_long_integer_type_node;
8824 type = long_integer_type_node;
8826 type = short_integer_type_node;
8828 if (declspecs->specs[(int)ds_complex])
8830 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8831 error ("complex invalid for %qs", name);
8832 /* If we just have "complex", it is equivalent to
8833 "complex double", but if any modifiers at all are specified it is
8834 the complex form of TYPE. E.g, "complex short" is
8835 "complex short int". */
8836 else if (defaulted_int && ! longlong && ! explicit_int128
8837 && ! (long_p || short_p || signed_p || unsigned_p))
8838 type = complex_double_type_node;
8839 else if (type == integer_type_node)
8840 type = complex_integer_type_node;
8841 else if (type == float_type_node)
8842 type = complex_float_type_node;
8843 else if (type == double_type_node)
8844 type = complex_double_type_node;
8845 else if (type == long_double_type_node)
8846 type = complex_long_double_type_node;
8848 type = build_complex_type (type);
8851 type_quals = TYPE_UNQUALIFIED;
8852 if (declspecs->specs[(int)ds_const])
8853 type_quals |= TYPE_QUAL_CONST;
8854 if (declspecs->specs[(int)ds_volatile])
8855 type_quals |= TYPE_QUAL_VOLATILE;
8856 if (declspecs->specs[(int)ds_restrict])
8857 type_quals |= TYPE_QUAL_RESTRICT;
8858 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8859 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8862 type_quals |= cp_type_quals (type);
8863 type = cp_build_qualified_type_real
8864 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8865 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8866 /* We might have ignored or rejected some of the qualifiers. */
8867 type_quals = cp_type_quals (type);
8870 inlinep = !! declspecs->specs[(int)ds_inline];
8871 virtualp = !! declspecs->specs[(int)ds_virtual];
8872 explicitp = !! declspecs->specs[(int)ds_explicit];
8874 storage_class = declspecs->storage_class;
8875 if (storage_class == sc_static)
8876 staticp = 1 + (decl_context == FIELD);
8878 if (virtualp && staticp == 2)
8880 error ("member %qD cannot be declared both virtual and static", dname);
8881 storage_class = sc_none;
8884 friendp = !! declspecs->specs[(int)ds_friend];
8886 if (dependent_name && !friendp)
8888 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8889 return error_mark_node;
8892 /* Issue errors about use of storage classes for parameters. */
8893 if (decl_context == PARM)
8895 if (declspecs->specs[(int)ds_typedef])
8897 error ("typedef declaration invalid in parameter declaration");
8898 return error_mark_node;
8900 else if (template_parm_flag && storage_class != sc_none)
8902 error ("storage class specified for template parameter %qs", name);
8903 return error_mark_node;
8905 else if (storage_class == sc_static
8906 || storage_class == sc_extern
8908 error ("storage class specifiers invalid in parameter declarations");
8910 /* Function parameters cannot be constexpr. If we saw one, moan
8911 and pretend it wasn't there. */
8914 error ("a parameter cannot be declared %<constexpr%>");
8919 /* Give error if `virtual' is used outside of class declaration. */
8921 && (current_class_name == NULL_TREE || decl_context != FIELD))
8923 error ("%<virtual%> outside class declaration");
8927 /* Static anonymous unions are dealt with here. */
8928 if (staticp && decl_context == TYPENAME
8930 && ANON_AGGR_TYPE_P (declspecs->type))
8931 decl_context = FIELD;
8933 /* Warn about storage classes that are invalid for certain
8934 kinds of declarations (parameters, typenames, etc.). */
8937 && storage_class != sc_extern
8938 && storage_class != sc_static)
8939 || declspecs->specs[(int)ds_typedef]))
8941 error ("multiple storage classes in declaration of %qs", name);
8944 if (decl_context != NORMAL
8945 && ((storage_class != sc_none
8946 && storage_class != sc_mutable)
8949 if ((decl_context == PARM || decl_context == CATCHPARM)
8950 && (storage_class == sc_register
8951 || storage_class == sc_auto))
8953 else if (declspecs->specs[(int)ds_typedef])
8955 else if (decl_context == FIELD
8956 /* C++ allows static class elements. */
8957 && storage_class == sc_static)
8958 /* C++ also allows inlines and signed and unsigned elements,
8959 but in those cases we don't come in here. */
8963 if (decl_context == FIELD)
8964 error ("storage class specified for %qs", name);
8967 if (decl_context == PARM || decl_context == CATCHPARM)
8968 error ("storage class specified for parameter %qs", name);
8970 error ("storage class specified for typename");
8972 if (storage_class == sc_register
8973 || storage_class == sc_auto
8974 || storage_class == sc_extern
8976 storage_class = sc_none;
8979 else if (storage_class == sc_extern && funcdef_flag
8980 && ! toplevel_bindings_p ())
8981 error ("nested function %qs declared %<extern%>", name);
8982 else if (toplevel_bindings_p ())
8984 if (storage_class == sc_auto)
8985 error ("top-level declaration of %qs specifies %<auto%>", name);
8988 && storage_class != sc_extern
8989 && storage_class != sc_static)
8991 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8996 if (storage_class && friendp)
8998 error ("storage class specifiers invalid in friend function declarations");
8999 storage_class = sc_none;
9004 unqualified_id = NULL_TREE;
9007 unqualified_id = id_declarator->u.id.unqualified_name;
9008 switch (TREE_CODE (unqualified_id))
9011 unqualified_id = TREE_OPERAND (unqualified_id, 0);
9012 if (TYPE_P (unqualified_id))
9013 unqualified_id = constructor_name (unqualified_id);
9016 case IDENTIFIER_NODE:
9017 case TEMPLATE_ID_EXPR:
9025 /* Determine the type of the entity declared by recurring on the
9027 for (; declarator; declarator = declarator->declarator)
9029 const cp_declarator *inner_declarator;
9032 if (type == error_mark_node)
9033 return error_mark_node;
9035 attrs = declarator->attributes;
9041 if (declarator == NULL || declarator->kind == cdk_id)
9042 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
9043 if (declarator->kind == cdk_function)
9044 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
9045 if (declarator->kind == cdk_array)
9046 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
9047 returned_attrs = decl_attributes (&type,
9048 chainon (returned_attrs, attrs),
9052 if (declarator->kind == cdk_id)
9055 inner_declarator = declarator->declarator;
9057 switch (declarator->kind)
9060 type = create_array_type_for_decl (dname, type,
9061 declarator->u.array.bounds);
9069 /* Declaring a function type.
9070 Make sure we have a valid type for the function to return. */
9072 if (type_quals != TYPE_UNQUALIFIED)
9074 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
9075 warning (OPT_Wignored_qualifiers,
9076 "type qualifiers ignored on function return type");
9077 /* We now know that the TYPE_QUALS don't apply to the
9078 decl, but to its return type. */
9079 type_quals = TYPE_UNQUALIFIED;
9081 errmsg = targetm.invalid_return_type (type);
9085 type = integer_type_node;
9088 /* Error about some types functions can't return. */
9090 if (TREE_CODE (type) == FUNCTION_TYPE)
9092 error ("%qs declared as function returning a function", name);
9093 return error_mark_node;
9095 if (TREE_CODE (type) == ARRAY_TYPE)
9097 error ("%qs declared as function returning an array", name);
9098 return error_mark_node;
9101 /* Pick up type qualifiers which should be applied to `this'. */
9102 memfn_quals = declarator->u.function.qualifiers;
9103 /* Pick up virt-specifiers. */
9104 virt_specifiers = declarator->u.function.virt_specifiers;
9105 /* Pick up the exception specifications. */
9106 raises = declarator->u.function.exception_specification;
9107 /* If the exception-specification is ill-formed, let's pretend
9108 there wasn't one. */
9109 if (raises == error_mark_node)
9112 /* Say it's a definition only for the CALL_EXPR
9113 closest to the identifier. */
9114 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
9116 /* Handle a late-specified return type. */
9119 if (type_uses_auto (type))
9121 if (!declarator->u.function.late_return_type)
9123 error ("%qs function uses %<auto%> type specifier without"
9124 " late return type", name);
9125 return error_mark_node;
9127 else if (!is_auto (type))
9129 error ("%qs function with late return type has"
9130 " %qT as its type rather than plain %<auto%>",
9132 return error_mark_node;
9135 else if (declarator->u.function.late_return_type)
9137 error ("%qs function with late return type not declared"
9138 " with %<auto%> type specifier", name);
9139 return error_mark_node;
9142 type = splice_late_return_type
9143 (type, declarator->u.function.late_return_type);
9144 if (type == error_mark_node)
9145 return error_mark_node;
9147 if (ctype == NULL_TREE
9148 && decl_context == FIELD
9150 && (friendp == 0 || dname == current_class_name))
9151 ctype = current_class_type;
9153 if (ctype && (sfk == sfk_constructor
9154 || sfk == sfk_destructor))
9156 /* We are within a class's scope. If our declarator name
9157 is the same as the class name, and we are defining
9158 a function, then it is a constructor/destructor, and
9159 therefore returns a void type. */
9161 /* ISO C++ 12.4/2. A destructor may not be declared
9162 const or volatile. A destructor may not be
9165 ISO C++ 12.1. A constructor may not be declared
9166 const or volatile. A constructor may not be
9167 virtual. A constructor may not be static. */
9169 error ((flags == DTOR_FLAG)
9170 ? G_("destructor cannot be static member function")
9171 : G_("constructor cannot be static member function"));
9174 error ((flags == DTOR_FLAG)
9175 ? G_("destructors may not be cv-qualified")
9176 : G_("constructors may not be cv-qualified"));
9177 memfn_quals = TYPE_UNQUALIFIED;
9180 if (decl_context == FIELD
9181 && !member_function_or_else (ctype,
9184 return error_mark_node;
9186 if (flags != DTOR_FLAG)
9188 /* It's a constructor. */
9193 permerror (input_location, "constructors cannot be declared virtual");
9196 if (decl_context == FIELD
9197 && sfk != sfk_constructor)
9198 return error_mark_node;
9200 if (decl_context == FIELD)
9206 error ("can%'t initialize friend function %qs", name);
9209 /* Cannot be both friend and virtual. */
9210 error ("virtual functions cannot be friends");
9213 if (decl_context == NORMAL)
9214 error ("friend declaration not in class definition");
9215 if (current_function_decl && funcdef_flag)
9216 error ("can%'t define friend function %qs in a local "
9220 else if (ctype && sfk == sfk_conversion)
9224 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
9229 arg_types = grokparms (declarator->u.function.parameters,
9232 if (inner_declarator
9233 && inner_declarator->kind == cdk_id
9234 && inner_declarator->u.id.sfk == sfk_destructor
9235 && arg_types != void_list_node)
9237 error ("destructors may not have parameters");
9238 arg_types = void_list_node;
9242 type = build_function_type (type, arg_types);
9249 /* Filter out pointers-to-references and references-to-references.
9250 We can get these if a TYPE_DECL is used. */
9252 if (TREE_CODE (type) == REFERENCE_TYPE)
9254 if (declarator->kind != cdk_reference)
9256 error ("cannot declare pointer to %q#T", type);
9257 type = TREE_TYPE (type);
9260 /* In C++0x, we allow reference to reference declarations
9261 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9262 and template type arguments [14.3.1/4 temp.arg.type]. The
9263 check for direct reference to reference declarations, which
9264 are still forbidden, occurs below. Reasoning behind the change
9265 can be found in DR106, DR540, and the rvalue reference
9267 else if (cxx_dialect == cxx98)
9269 error ("cannot declare reference to %q#T", type);
9270 type = TREE_TYPE (type);
9273 else if (VOID_TYPE_P (type))
9275 if (declarator->kind == cdk_reference)
9276 error ("cannot declare reference to %q#T", type);
9277 else if (declarator->kind == cdk_ptrmem)
9278 error ("cannot declare pointer to %q#T member", type);
9281 /* We now know that the TYPE_QUALS don't apply to the decl,
9282 but to the target of the pointer. */
9283 type_quals = TYPE_UNQUALIFIED;
9285 if (declarator->kind == cdk_ptrmem
9286 && (TREE_CODE (type) == FUNCTION_TYPE
9287 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9289 memfn_quals |= type_memfn_quals (type);
9290 type = build_memfn_type (type,
9291 declarator->u.pointer.class_type,
9293 if (type == error_mark_node)
9294 return error_mark_node;
9295 memfn_quals = TYPE_UNQUALIFIED;
9298 if (TREE_CODE (type) == FUNCTION_TYPE
9299 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9300 error (declarator->kind == cdk_reference
9301 ? G_("cannot declare reference to qualified function type %qT")
9302 : G_("cannot declare pointer to qualified function type %qT"),
9305 /* When the pointed-to type involves components of variable size,
9306 care must be taken to ensure that the size evaluation code is
9307 emitted early enough to dominate all the possible later uses
9308 and late enough for the variables on which it depends to have
9311 This is expected to happen automatically when the pointed-to
9312 type has a name/declaration of it's own, but special attention
9313 is required if the type is anonymous.
9315 We handle the NORMAL and FIELD contexts here by inserting a
9316 dummy statement that just evaluates the size at a safe point
9317 and ensures it is not deferred until e.g. within a deeper
9318 conditional context (c++/43555).
9320 We expect nothing to be needed here for PARM or TYPENAME.
9321 Evaluating the size at this point for TYPENAME would
9322 actually be incorrect, as we might be in the middle of an
9323 expression with side effects on the pointed-to type size
9324 "arguments" prior to the pointer declaration point and the
9325 size evaluation could end up prior to the side effects. */
9327 if (!TYPE_NAME (type)
9328 && (decl_context == NORMAL || decl_context == FIELD)
9329 && at_function_scope_p ()
9330 && variably_modified_type_p (type, NULL_TREE))
9332 /* First break out any side-effects. */
9333 stabilize_vla_size (TYPE_SIZE (type));
9334 /* And then force evaluation of the SAVE_EXPR. */
9335 finish_expr_stmt (TYPE_SIZE (type));
9338 if (declarator->kind == cdk_reference)
9340 /* In C++0x, the type we are creating a reference to might be
9341 a typedef which is itself a reference type. In that case,
9342 we follow the reference collapsing rules in
9343 [7.1.3/8 dcl.typedef] to create the final reference type:
9345 "If a typedef TD names a type that is a reference to a type
9346 T, an attempt to create the type 'lvalue reference to cv TD'
9347 creates the type 'lvalue reference to T,' while an attempt
9348 to create the type "rvalue reference to cv TD' creates the
9351 if (VOID_TYPE_P (type))
9352 /* We already gave an error. */;
9353 else if (TREE_CODE (type) == REFERENCE_TYPE)
9355 if (declarator->u.reference.rvalue_ref)
9356 /* Leave type alone. */;
9358 type = cp_build_reference_type (TREE_TYPE (type), false);
9361 type = cp_build_reference_type
9362 (type, declarator->u.reference.rvalue_ref);
9364 /* In C++0x, we need this check for direct reference to
9365 reference declarations, which are forbidden by
9366 [8.3.2/5 dcl.ref]. Reference to reference declarations
9367 are only allowed indirectly through typedefs and template
9368 type arguments. Example:
9370 void foo(int & &); // invalid ref-to-ref decl
9372 typedef int & int_ref;
9373 void foo(int_ref &); // valid ref-to-ref decl
9375 if (inner_declarator && inner_declarator->kind == cdk_reference)
9376 error ("cannot declare reference to %q#T, which is not "
9377 "a typedef or a template type argument", type);
9379 else if (TREE_CODE (type) == METHOD_TYPE)
9380 type = build_ptrmemfunc_type (build_pointer_type (type));
9381 else if (declarator->kind == cdk_ptrmem)
9383 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9385 if (declarator->u.pointer.class_type == error_mark_node)
9386 /* We will already have complained. */
9387 type = error_mark_node;
9389 type = build_ptrmem_type (declarator->u.pointer.class_type,
9393 type = build_pointer_type (type);
9395 /* Process a list of type modifier keywords (such as
9396 const or volatile) that were given inside the `*' or `&'. */
9398 if (declarator->u.pointer.qualifiers)
9401 = cp_build_qualified_type (type,
9402 declarator->u.pointer.qualifiers);
9403 type_quals = cp_type_quals (type);
9416 /* We need to stabilize side-effects in VLA sizes for regular array
9417 declarations too, not just pointers to arrays. */
9418 if (type != error_mark_node && !TYPE_NAME (type)
9419 && (decl_context == NORMAL || decl_context == FIELD)
9420 && at_function_scope_p ()
9421 && variably_modified_type_p (type, NULL_TREE))
9422 stabilize_vla_size (TYPE_SIZE (type));
9424 /* A `constexpr' specifier used in an object declaration declares
9425 the object as `const'. */
9426 if (constexpr_p && innermost_code != cdk_function)
9428 if (type_quals & TYPE_QUAL_CONST)
9429 error ("both %<const%> and %<constexpr%> cannot be used here");
9430 if (type_quals & TYPE_QUAL_VOLATILE)
9431 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9432 if (TREE_CODE (type) != REFERENCE_TYPE)
9434 type_quals |= TYPE_QUAL_CONST;
9435 type = cp_build_qualified_type (type, type_quals);
9439 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9440 && TREE_CODE (type) != FUNCTION_TYPE
9441 && TREE_CODE (type) != METHOD_TYPE)
9443 error ("template-id %qD used as a declarator",
9445 unqualified_id = dname;
9448 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9449 qualified with a class-name, turn it into a METHOD_TYPE, unless
9450 we know that the function is static. We take advantage of this
9451 opportunity to do other processing that pertains to entities
9452 explicitly declared to be class members. Note that if DECLARATOR
9453 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9454 would not have exited the loop above. */
9456 && declarator->u.id.qualifying_scope
9457 && MAYBE_CLASS_TYPE_P (declarator->u.id.qualifying_scope))
9461 ctype = declarator->u.id.qualifying_scope;
9462 ctype = TYPE_MAIN_VARIANT (ctype);
9464 while (t != NULL_TREE && CLASS_TYPE_P (t))
9466 /* You're supposed to have one `template <...>' for every
9467 template class, but you don't need one for a full
9468 specialization. For example:
9470 template <class T> struct S{};
9471 template <> struct S<int> { void f(); };
9472 void S<int>::f () {}
9474 is correct; there shouldn't be a `template <>' for the
9475 definition of `S<int>::f'. */
9476 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9477 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9478 /* T is an explicit (not partial) specialization. All
9479 containing classes must therefore also be explicitly
9482 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9483 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9484 template_count += 1;
9486 t = TYPE_MAIN_DECL (t);
9487 t = DECL_CONTEXT (t);
9490 if (ctype == current_class_type)
9494 permerror (input_location, "member functions are implicitly friends of their class");
9498 permerror (declarator->id_loc,
9499 "extra qualification %<%T::%> on member %qs",
9502 else if (/* If the qualifying type is already complete, then we
9503 can skip the following checks. */
9504 !COMPLETE_TYPE_P (ctype)
9505 && (/* If the function is being defined, then
9506 qualifying type must certainly be complete. */
9508 /* A friend declaration of "T::f" is OK, even if
9509 "T" is a template parameter. But, if this
9510 function is not a friend, the qualifying type
9512 || (!friendp && !CLASS_TYPE_P (ctype))
9513 /* For a declaration, the type need not be
9514 complete, if either it is dependent (since there
9515 is no meaningful definition of complete in that
9516 case) or the qualifying class is currently being
9518 || !(dependent_type_p (ctype)
9519 || currently_open_class (ctype)))
9520 /* Check that the qualifying type is complete. */
9521 && !complete_type_or_else (ctype, NULL_TREE))
9522 return error_mark_node;
9523 else if (TREE_CODE (type) == FUNCTION_TYPE)
9525 if (current_class_type
9526 && (!friendp || funcdef_flag))
9529 ? G_("cannot define member function %<%T::%s%> "
9531 : G_("cannot declare member function %<%T::%s%> "
9533 ctype, name, current_class_type);
9534 return error_mark_node;
9537 else if (declspecs->specs[(int)ds_typedef]
9538 && current_class_type)
9540 error ("cannot declare member %<%T::%s%> within %qT",
9541 ctype, name, current_class_type);
9542 return error_mark_node;
9546 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9547 ctype = current_class_type;
9549 /* Now TYPE has the actual type. */
9554 *attrlist = chainon (returned_attrs, *attrlist);
9556 attrlist = &returned_attrs;
9559 /* Handle parameter packs. */
9560 if (parameter_pack_p)
9562 if (decl_context == PARM)
9563 /* Turn the type into a pack expansion.*/
9564 type = make_pack_expansion (type);
9566 error ("non-parameter %qs cannot be a parameter pack", name);
9569 /* Did array size calculations overflow? */
9571 if (TREE_CODE (type) == ARRAY_TYPE
9572 && COMPLETE_TYPE_P (type)
9573 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9574 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9576 error ("size of array %qs is too large", name);
9577 /* If we proceed with the array type as it is, we'll eventually
9578 crash in tree_low_cst(). */
9579 type = error_mark_node;
9582 if ((decl_context == FIELD || decl_context == PARM)
9583 && !processing_template_decl
9584 && variably_modified_type_p (type, NULL_TREE))
9586 if (decl_context == FIELD)
9587 error ("data member may not have variably modified type %qT", type);
9589 error ("parameter may not have variably modified type %qT", type);
9590 type = error_mark_node;
9593 if (explicitp == 1 || (explicitp && friendp))
9595 /* [dcl.fct.spec] The explicit specifier shall only be used in
9596 declarations of constructors within a class definition. */
9597 error ("only declarations of constructors can be %<explicit%>");
9601 if (storage_class == sc_mutable)
9603 if (decl_context != FIELD || friendp)
9605 error ("non-member %qs cannot be declared %<mutable%>", name);
9606 storage_class = sc_none;
9608 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9610 error ("non-object member %qs cannot be declared %<mutable%>", name);
9611 storage_class = sc_none;
9613 else if (TREE_CODE (type) == FUNCTION_TYPE
9614 || TREE_CODE (type) == METHOD_TYPE)
9616 error ("function %qs cannot be declared %<mutable%>", name);
9617 storage_class = sc_none;
9621 error ("static %qs cannot be declared %<mutable%>", name);
9622 storage_class = sc_none;
9624 else if (type_quals & TYPE_QUAL_CONST)
9626 error ("const %qs cannot be declared %<mutable%>", name);
9627 storage_class = sc_none;
9629 else if (TREE_CODE (type) == REFERENCE_TYPE)
9631 permerror (input_location, "reference %qs cannot be declared "
9632 "%<mutable%>", name);
9633 storage_class = sc_none;
9637 /* If this is declaring a typedef name, return a TYPE_DECL. */
9638 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9642 /* Note that the grammar rejects storage classes
9643 in typenames, fields or parameters. */
9644 if (current_lang_name == lang_name_java)
9645 TYPE_FOR_JAVA (type) = 1;
9647 /* This declaration:
9649 typedef void f(int) const;
9651 declares a function type which is not a member of any
9652 particular class, but which is cv-qualified; for
9653 example "f S::*" declares a pointer to a const-qualified
9654 member function of S. We record the cv-qualification in the
9656 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9658 type = apply_memfn_quals (type, memfn_quals);
9660 /* We have now dealt with these qualifiers. */
9661 memfn_quals = TYPE_UNQUALIFIED;
9664 if (type_uses_auto (type))
9666 error ("typedef declared %<auto%>");
9667 type = error_mark_node;
9670 if (decl_context == FIELD)
9671 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9673 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9674 if (id_declarator && declarator->u.id.qualifying_scope) {
9675 error_at (DECL_SOURCE_LOCATION (decl),
9676 "typedef name may not be a nested-name-specifier");
9677 TREE_TYPE (decl) = error_mark_node;
9680 if (decl_context != FIELD)
9682 if (!current_function_decl)
9683 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9684 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9685 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9686 (current_function_decl)))
9687 /* The TYPE_DECL is "abstract" because there will be
9688 clones of this constructor/destructor, and there will
9689 be copies of this TYPE_DECL generated in those
9691 DECL_ABSTRACT (decl) = 1;
9693 else if (constructor_name_p (unqualified_id, current_class_type))
9694 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9695 "as enclosing class",
9698 /* If the user declares "typedef struct {...} foo" then the
9699 struct will have an anonymous name. Fill that name in now.
9700 Nothing can refer to it, so nothing needs know about the name
9702 if (type != error_mark_node
9705 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9706 && TYPE_ANONYMOUS_P (type)
9707 && declspecs->type_definition_p
9708 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9712 /* Replace the anonymous name with the real name everywhere. */
9713 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9715 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9716 /* We do not rename the debug info representing the
9717 anonymous tagged type because the standard says in
9718 [dcl.typedef] that the naming applies only for
9719 linkage purposes. */
9720 /*debug_hooks->set_name (t, decl);*/
9721 TYPE_NAME (t) = decl;
9724 if (TYPE_LANG_SPECIFIC (type))
9725 TYPE_WAS_ANONYMOUS (type) = 1;
9727 /* If this is a typedef within a template class, the nested
9728 type is a (non-primary) template. The name for the
9729 template needs updating as well. */
9730 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9731 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9732 = TYPE_IDENTIFIER (type);
9734 /* Adjust linkage now that we aren't anonymous anymore. */
9735 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9736 determine_visibility (TYPE_MAIN_DECL (type));
9738 /* FIXME remangle member functions; member functions of a
9739 type with external linkage have external linkage. */
9743 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9744 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9746 bad_specifiers (decl, BSP_TYPE, virtualp,
9747 memfn_quals != TYPE_UNQUALIFIED,
9748 inlinep, friendp, raises != NULL_TREE);
9753 /* Detect the case of an array type of unspecified size
9754 which came, as such, direct from a typedef name.
9755 We must copy the type, so that the array's domain can be
9756 individually set by the object's initializer. */
9758 if (type && typedef_type
9759 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9760 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9761 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9763 /* Detect where we're using a typedef of function type to declare a
9764 function. PARMS will not be set, so we must create it now. */
9766 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9768 tree decls = NULL_TREE;
9771 for (args = TYPE_ARG_TYPES (type);
9772 args && args != void_list_node;
9773 args = TREE_CHAIN (args))
9775 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9777 DECL_CHAIN (decl) = decls;
9781 parms = nreverse (decls);
9783 if (decl_context != TYPENAME)
9785 /* A cv-qualifier-seq shall only be part of the function type
9786 for a non-static member function. [8.3.5/4 dcl.fct] */
9787 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9788 && (current_class_type == NULL_TREE || staticp) )
9791 ? G_("qualified function types cannot be used to "
9792 "declare static member functions")
9793 : G_("qualified function types cannot be used to "
9794 "declare free functions"));
9795 type = TYPE_MAIN_VARIANT (type);
9798 /* The qualifiers on the function type become the qualifiers on
9799 the non-static member function. */
9800 memfn_quals |= type_memfn_quals (type);
9801 type_quals = TYPE_UNQUALIFIED;
9805 /* If this is a type name (such as, in a cast or sizeof),
9806 compute the type and return it now. */
9808 if (decl_context == TYPENAME)
9810 /* Note that the grammar rejects storage classes
9811 in typenames, fields or parameters. */
9812 if (type_quals != TYPE_UNQUALIFIED)
9813 type_quals = TYPE_UNQUALIFIED;
9815 /* Special case: "friend class foo" looks like a TYPENAME context. */
9818 if (type_quals != TYPE_UNQUALIFIED)
9820 error ("type qualifiers specified for friend class declaration");
9821 type_quals = TYPE_UNQUALIFIED;
9825 error ("%<inline%> specified for friend class declaration");
9831 /* Don't allow friend declaration without a class-key. */
9832 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9833 permerror (input_location, "template parameters cannot be friends");
9834 else if (TREE_CODE (type) == TYPENAME_TYPE)
9835 permerror (input_location, "friend declaration requires class-key, "
9836 "i.e. %<friend class %T::%D%>",
9837 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9839 permerror (input_location, "friend declaration requires class-key, "
9840 "i.e. %<friend %#T%>",
9844 /* Only try to do this stuff if we didn't already give up. */
9845 if (type != integer_type_node)
9847 /* A friendly class? */
9848 if (current_class_type)
9849 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9852 error ("trying to make class %qT a friend of global scope",
9855 type = void_type_node;
9858 else if (memfn_quals)
9860 if (ctype == NULL_TREE
9861 && TREE_CODE (type) == METHOD_TYPE)
9862 ctype = TYPE_METHOD_BASETYPE (type);
9865 type = build_memfn_type (type, ctype, memfn_quals);
9866 /* Core issue #547: need to allow this in template type args. */
9867 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9868 type = apply_memfn_quals (type, memfn_quals);
9870 error ("invalid qualifiers on non-member function type");
9875 else if (unqualified_id == NULL_TREE && decl_context != PARM
9876 && decl_context != CATCHPARM
9877 && TREE_CODE (type) != UNION_TYPE
9880 error ("abstract declarator %qT used as declaration", type);
9881 return error_mark_node;
9884 /* Only functions may be declared using an operator-function-id. */
9886 && IDENTIFIER_OPNAME_P (unqualified_id)
9887 && TREE_CODE (type) != FUNCTION_TYPE
9888 && TREE_CODE (type) != METHOD_TYPE)
9890 error ("declaration of %qD as non-function", unqualified_id);
9891 return error_mark_node;
9894 /* We don't check parameter types here because we can emit a better
9895 error message later. */
9896 if (decl_context != PARM)
9898 type = check_var_type (unqualified_id, type);
9899 if (type == error_mark_node)
9900 return error_mark_node;
9903 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9904 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9906 if (decl_context == PARM || decl_context == CATCHPARM)
9908 if (ctype || in_namespace)
9909 error ("cannot use %<::%> in parameter declaration");
9911 if (type_uses_auto (type))
9913 error ("parameter declared %<auto%>");
9914 type = error_mark_node;
9917 /* A parameter declared as an array of T is really a pointer to T.
9918 One declared as a function is really a pointer to a function.
9919 One declared as a member is really a pointer to member. */
9921 if (TREE_CODE (type) == ARRAY_TYPE)
9923 /* Transfer const-ness of array into that of type pointed to. */
9924 type = build_pointer_type (TREE_TYPE (type));
9925 type_quals = TYPE_UNQUALIFIED;
9927 else if (TREE_CODE (type) == FUNCTION_TYPE)
9928 type = build_pointer_type (type);
9931 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9932 && !NEW_DELETE_OPNAME_P (unqualified_id))
9934 cp_cv_quals real_quals = memfn_quals;
9935 if (constexpr_p && sfk != sfk_constructor && sfk != sfk_destructor)
9936 real_quals |= TYPE_QUAL_CONST;
9937 type = build_memfn_type (type, ctype, real_quals);
9943 if (decl_context == PARM)
9945 decl = cp_build_parm_decl (unqualified_id, type);
9947 bad_specifiers (decl, BSP_PARM, virtualp,
9948 memfn_quals != TYPE_UNQUALIFIED,
9949 inlinep, friendp, raises != NULL_TREE);
9951 else if (decl_context == FIELD)
9953 /* The C99 flexible array extension. */
9954 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9955 && TYPE_DOMAIN (type) == NULL_TREE)
9957 tree itype = compute_array_index_type (dname, integer_zero_node,
9958 tf_warning_or_error);
9959 type = build_cplus_array_type (TREE_TYPE (type), itype);
9962 if (type == error_mark_node)
9964 /* Happens when declaring arrays of sizes which
9965 are error_mark_node, for example. */
9968 else if (in_namespace && !friendp)
9970 /* Something like struct S { int N::j; }; */
9971 error ("invalid use of %<::%>");
9972 return error_mark_node;
9974 else if (TREE_CODE (type) == FUNCTION_TYPE
9975 || TREE_CODE (type) == METHOD_TYPE)
9978 tree function_context;
9982 /* This should never happen in pure C++ (the check
9983 could be an assert). It could happen in
9984 Objective-C++ if someone writes invalid code that
9985 uses a function declaration for an instance
9986 variable or property (instance variables and
9987 properties are parsed as FIELD_DECLs, but they are
9988 part of an Objective-C class, not a C++ class).
9989 That code is invalid and is caught by this
9993 error ("declaration of function %qD in invalid context",
9995 return error_mark_node;
9998 /* ``A union may [ ... ] not [ have ] virtual functions.''
10000 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
10002 error ("function %qD declared virtual inside a union",
10004 return error_mark_node;
10007 if (NEW_DELETE_OPNAME_P (unqualified_id))
10011 error ("%qD cannot be declared virtual, since it "
10012 "is always static",
10019 /* Check that the name used for a destructor makes sense. */
10020 if (sfk == sfk_destructor)
10022 tree uqname = id_declarator->u.id.unqualified_name;
10026 gcc_assert (friendp);
10027 error ("expected qualified name in friend declaration "
10028 "for destructor %qD", uqname);
10029 return error_mark_node;
10032 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
10034 error ("declaration of %qD as member of %qT",
10036 return error_mark_node;
10040 error ("a destructor cannot be %<constexpr%>");
10041 return error_mark_node;
10044 else if (sfk == sfk_constructor && friendp && !ctype)
10046 error ("expected qualified name in friend declaration "
10047 "for constructor %qD",
10048 id_declarator->u.id.unqualified_name);
10049 return error_mark_node;
10052 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10053 function_context = (ctype != NULL_TREE) ?
10054 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
10055 publicp = (! friendp || ! staticp)
10056 && function_context == NULL_TREE;
10057 decl = grokfndecl (ctype, type,
10058 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
10059 ? unqualified_id : dname,
10062 virtualp, flags, memfn_quals, raises,
10063 friendp ? -1 : 0, friendp, publicp,
10064 inlinep | (2 * constexpr_p),
10066 funcdef_flag, template_count, in_namespace,
10067 attrlist, declarator->id_loc);
10068 decl = set_virt_specifiers (decl, virt_specifiers);
10069 if (decl == NULL_TREE)
10070 return error_mark_node;
10072 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10073 /* The decl and setting of decl_attr is also turned off. */
10074 decl = build_decl_attribute_variant (decl, decl_attr);
10077 /* [class.conv.ctor]
10079 A constructor declared without the function-specifier
10080 explicit that can be called with a single parameter
10081 specifies a conversion from the type of its first
10082 parameter to the type of its class. Such a constructor
10083 is called a converting constructor. */
10084 if (explicitp == 2)
10085 DECL_NONCONVERTING_P (decl) = 1;
10087 else if (!staticp && !dependent_type_p (type)
10088 && !COMPLETE_TYPE_P (complete_type (type))
10089 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
10091 if (unqualified_id)
10092 error ("field %qD has incomplete type", unqualified_id);
10094 error ("name %qT has incomplete type", type);
10096 /* If we're instantiating a template, tell them which
10097 instantiation made the field's type be incomplete. */
10098 if (current_class_type
10099 && TYPE_NAME (current_class_type)
10100 && IDENTIFIER_TEMPLATE (current_class_name)
10102 && declspecs->type == type)
10103 error (" in instantiation of template %qT",
10104 current_class_type);
10106 return error_mark_node;
10112 error ("%qE is neither function nor member function; "
10113 "cannot be declared friend", unqualified_id);
10121 /* Friends are treated specially. */
10122 if (ctype == current_class_type)
10123 ; /* We already issued a permerror. */
10124 else if (decl && DECL_NAME (decl))
10126 if (template_class_depth (current_class_type) == 0)
10128 decl = check_explicit_specialization
10129 (unqualified_id, decl, template_count,
10130 2 * funcdef_flag + 4);
10131 if (decl == error_mark_node)
10132 return error_mark_node;
10135 decl = do_friend (ctype, unqualified_id, decl,
10141 return error_mark_node;
10144 /* Structure field. It may not be a function, except for C++. */
10146 if (decl == NULL_TREE)
10150 /* C++ allows static class members. All other work
10151 for this is done by grokfield. */
10152 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
10153 set_linkage_for_static_data_member (decl);
10154 /* Even if there is an in-class initialization, DECL
10155 is considered undefined until an out-of-class
10156 definition is provided. */
10157 DECL_EXTERNAL (decl) = 1;
10160 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
10162 if (constexpr_p && !initialized)
10164 error ("constexpr static data member %qD must have an "
10165 "initializer", decl);
10166 constexpr_p = false;
10173 error ("non-static data member %qE declared %<constexpr%>",
10175 constexpr_p = false;
10177 decl = build_decl (input_location,
10178 FIELD_DECL, unqualified_id, type);
10179 DECL_NONADDRESSABLE_P (decl) = bitfield;
10180 if (bitfield && !unqualified_id)
10181 TREE_NO_WARNING (decl) = 1;
10183 if (storage_class == sc_mutable)
10185 DECL_MUTABLE_P (decl) = 1;
10186 storage_class = sc_none;
10190 /* An attempt is being made to initialize a non-static
10191 member. This is new in C++11. */
10192 maybe_warn_cpp0x (CPP0X_NSDMI);
10195 bad_specifiers (decl, BSP_FIELD, virtualp,
10196 memfn_quals != TYPE_UNQUALIFIED,
10197 inlinep, friendp, raises != NULL_TREE);
10200 else if (TREE_CODE (type) == FUNCTION_TYPE
10201 || TREE_CODE (type) == METHOD_TYPE)
10203 tree original_name;
10206 if (!unqualified_id)
10207 return error_mark_node;
10209 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
10210 original_name = dname;
10212 original_name = unqualified_id;
10214 if (storage_class == sc_auto)
10215 error ("storage class %<auto%> invalid for function %qs", name);
10216 else if (storage_class == sc_register)
10217 error ("storage class %<register%> invalid for function %qs", name);
10219 error ("storage class %<__thread%> invalid for function %qs", name);
10221 if (virt_specifiers)
10222 error ("virt-specifiers in %qs not allowed outside a class definition", name);
10223 /* Function declaration not at top level.
10224 Storage classes other than `extern' are not allowed
10225 and `extern' makes no difference. */
10226 if (! toplevel_bindings_p ()
10227 && (storage_class == sc_static
10228 || declspecs->specs[(int)ds_inline])
10231 if (storage_class == sc_static)
10232 pedwarn (input_location, OPT_pedantic,
10233 "%<static%> specified invalid for function %qs "
10234 "declared out of global scope", name);
10236 pedwarn (input_location, OPT_pedantic,
10237 "%<inline%> specifier invalid for function %qs "
10238 "declared out of global scope", name);
10241 if (ctype == NULL_TREE)
10245 error ("virtual non-class function %qs", name);
10248 else if (sfk == sfk_constructor
10249 || sfk == sfk_destructor)
10251 error (funcdef_flag
10252 ? G_("%qs defined in a non-class scope")
10253 : G_("%qs declared in a non-class scope"), name);
10258 /* Record presence of `static'. */
10259 publicp = (ctype != NULL_TREE
10260 || storage_class == sc_extern
10261 || storage_class != sc_static);
10263 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10264 virtualp, flags, memfn_quals, raises,
10266 publicp, inlinep | (2 * constexpr_p), sfk,
10268 template_count, in_namespace, attrlist,
10269 declarator->id_loc);
10270 if (decl == NULL_TREE)
10271 return error_mark_node;
10275 int invalid_static = 0;
10277 /* Don't allow a static member function in a class, and forbid
10278 declaring main to be static. */
10279 if (TREE_CODE (type) == METHOD_TYPE)
10281 permerror (input_location, "cannot declare member function %qD to have "
10282 "static linkage", decl);
10283 invalid_static = 1;
10285 else if (current_function_decl)
10287 /* FIXME need arm citation */
10288 error ("cannot declare static function inside another function");
10289 invalid_static = 1;
10292 if (invalid_static)
10295 storage_class = sc_none;
10301 /* It's a variable. */
10303 /* An uninitialized decl with `extern' is a reference. */
10304 decl = grokvardecl (type, unqualified_id,
10307 (type_quals & TYPE_QUAL_CONST) != 0,
10308 ctype ? ctype : in_namespace);
10309 bad_specifiers (decl, BSP_VAR, virtualp,
10310 memfn_quals != TYPE_UNQUALIFIED,
10311 inlinep, friendp, raises != NULL_TREE);
10315 DECL_CONTEXT (decl) = ctype;
10318 permerror (input_location, "%<static%> may not be used when defining "
10319 "(as opposed to declaring) a static data member");
10321 storage_class = sc_none;
10323 if (storage_class == sc_register && TREE_STATIC (decl))
10325 error ("static member %qD declared %<register%>", decl);
10326 storage_class = sc_none;
10328 if (storage_class == sc_extern && pedantic)
10330 pedwarn (input_location, OPT_pedantic,
10331 "cannot explicitly declare member %q#D to have "
10332 "extern linkage", decl);
10333 storage_class = sc_none;
10336 else if (constexpr_p && DECL_EXTERNAL (decl))
10338 error ("declaration of constexpr variable %qD is not a definition",
10340 constexpr_p = false;
10344 if (storage_class == sc_extern && initialized && !funcdef_flag)
10346 if (toplevel_bindings_p ())
10348 /* It's common practice (and completely valid) to have a const
10349 be initialized and declared extern. */
10350 if (!(type_quals & TYPE_QUAL_CONST))
10351 warning (0, "%qs initialized and declared %<extern%>", name);
10355 error ("%qs has both %<extern%> and initializer", name);
10356 return error_mark_node;
10360 /* Record `register' declaration for warnings on &
10361 and in case doing stupid register allocation. */
10363 if (storage_class == sc_register)
10364 DECL_REGISTER (decl) = 1;
10365 else if (storage_class == sc_extern)
10366 DECL_THIS_EXTERN (decl) = 1;
10367 else if (storage_class == sc_static)
10368 DECL_THIS_STATIC (decl) = 1;
10370 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10371 if (constexpr_p && TREE_CODE (decl) == VAR_DECL)
10372 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10374 /* Record constancy and volatility on the DECL itself . There's
10375 no need to do this when processing a template; we'll do this
10376 for the instantiated declaration based on the type of DECL. */
10377 if (!processing_template_decl)
10378 cp_apply_type_quals_to_decl (type_quals, decl);
10384 /* Subroutine of start_function. Ensure that each of the parameter
10385 types (as listed in PARMS) is complete, as is required for a
10386 function definition. */
10389 require_complete_types_for_parms (tree parms)
10391 for (; parms; parms = DECL_CHAIN (parms))
10393 if (dependent_type_p (TREE_TYPE (parms)))
10395 if (!VOID_TYPE_P (TREE_TYPE (parms))
10396 && complete_type_or_else (TREE_TYPE (parms), parms))
10398 relayout_decl (parms);
10399 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10402 /* grokparms or complete_type_or_else will have already issued
10404 TREE_TYPE (parms) = error_mark_node;
10408 /* Returns nonzero if T is a local variable. */
10411 local_variable_p (const_tree t)
10413 if ((TREE_CODE (t) == VAR_DECL
10414 /* A VAR_DECL with a context that is a _TYPE is a static data
10416 && !TYPE_P (CP_DECL_CONTEXT (t))
10417 /* Any other non-local variable must be at namespace scope. */
10418 && !DECL_NAMESPACE_SCOPE_P (t))
10419 || (TREE_CODE (t) == PARM_DECL))
10425 /* Like local_variable_p, but suitable for use as a tree-walking
10429 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10430 void *data ATTRIBUTE_UNUSED)
10432 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10434 else if (TYPE_P (*tp))
10435 *walk_subtrees = 0;
10441 /* Check that ARG, which is a default-argument expression for a
10442 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10443 something goes wrong. DECL may also be a _TYPE node, rather than a
10444 DECL, if there is no DECL available. */
10447 check_default_argument (tree decl, tree arg)
10452 if (TREE_CODE (arg) == DEFAULT_ARG)
10453 /* We get a DEFAULT_ARG when looking at an in-class declaration
10454 with a default argument. Ignore the argument for now; we'll
10455 deal with it after the class is complete. */
10464 decl_type = TREE_TYPE (decl);
10466 if (arg == error_mark_node
10467 || decl == error_mark_node
10468 || TREE_TYPE (arg) == error_mark_node
10469 || decl_type == error_mark_node)
10470 /* Something already went wrong. There's no need to check
10472 return error_mark_node;
10474 /* [dcl.fct.default]
10476 A default argument expression is implicitly converted to the
10478 if (!TREE_TYPE (arg)
10479 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10482 error ("default argument for %q#D has type %qT",
10483 decl, TREE_TYPE (arg));
10485 error ("default argument for parameter of type %qT has type %qT",
10486 decl_type, TREE_TYPE (arg));
10488 return error_mark_node;
10491 /* [dcl.fct.default]
10493 Local variables shall not be used in default argument
10496 The keyword `this' shall not be used in a default argument of a
10497 member function. */
10498 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10501 error ("default argument %qE uses local variable %qD", arg, var);
10502 return error_mark_node;
10509 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10512 type_is_deprecated (tree type)
10514 enum tree_code code;
10515 if (TREE_DEPRECATED (type))
10517 if (TYPE_NAME (type)
10518 && TREE_DEPRECATED (TYPE_NAME (type)))
10521 /* Do warn about using typedefs to a deprecated class. */
10522 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10523 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10525 code = TREE_CODE (type);
10527 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10528 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10529 || code == METHOD_TYPE || code == ARRAY_TYPE)
10530 return type_is_deprecated (TREE_TYPE (type));
10532 if (TYPE_PTRMEMFUNC_P (type))
10533 return type_is_deprecated
10534 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10539 /* Decode the list of parameter types for a function type.
10540 Given the list of things declared inside the parens,
10541 return a list of types.
10543 If this parameter does not end with an ellipsis, we append
10546 *PARMS is set to the chain of PARM_DECLs created. */
10549 grokparms (tree parmlist, tree *parms)
10551 tree result = NULL_TREE;
10552 tree decls = NULL_TREE;
10556 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10558 tree type = NULL_TREE;
10559 tree init = TREE_PURPOSE (parm);
10560 tree decl = TREE_VALUE (parm);
10561 const char *errmsg;
10563 if (parm == void_list_node)
10566 if (! decl || TREE_TYPE (decl) == error_mark_node)
10569 type = TREE_TYPE (decl);
10570 if (VOID_TYPE_P (type))
10572 if (same_type_p (type, void_type_node)
10573 && DECL_SELF_REFERENCE_P (type)
10574 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10575 /* this is a parmlist of `(void)', which is ok. */
10577 cxx_incomplete_type_error (decl, type);
10578 /* It's not a good idea to actually create parameters of
10579 type `void'; other parts of the compiler assume that a
10580 void type terminates the parameter list. */
10581 type = error_mark_node;
10582 TREE_TYPE (decl) = error_mark_node;
10585 if (type != error_mark_node
10586 && TYPE_FOR_JAVA (type)
10587 && MAYBE_CLASS_TYPE_P (type))
10589 error ("parameter %qD has Java class type", decl);
10590 type = error_mark_node;
10591 TREE_TYPE (decl) = error_mark_node;
10595 if (type != error_mark_node
10596 && (errmsg = targetm.invalid_parameter_type (type)))
10599 type = error_mark_node;
10600 TREE_TYPE (decl) = error_mark_node;
10603 if (type != error_mark_node)
10605 if (deprecated_state != DEPRECATED_SUPPRESS)
10607 tree deptype = type_is_deprecated (type);
10609 warn_deprecated_use (deptype, NULL_TREE);
10612 /* Top-level qualifiers on the parameters are
10613 ignored for function types. */
10614 type = cp_build_qualified_type (type, 0);
10615 if (TREE_CODE (type) == METHOD_TYPE)
10617 error ("parameter %qD invalidly declared method type", decl);
10618 type = build_pointer_type (type);
10619 TREE_TYPE (decl) = type;
10621 else if (abstract_virtuals_error (decl, type))
10622 any_error = 1; /* Seems like a good idea. */
10623 else if (POINTER_TYPE_P (type))
10625 /* [dcl.fct]/6, parameter types cannot contain pointers
10626 (references) to arrays of unknown bound. */
10627 tree t = TREE_TYPE (type);
10628 int ptr = TYPE_PTR_P (type);
10632 if (TYPE_PTR_P (t))
10634 else if (TREE_CODE (t) != ARRAY_TYPE)
10636 else if (!TYPE_DOMAIN (t))
10640 if (TREE_CODE (t) == ARRAY_TYPE)
10642 ? G_("parameter %qD includes pointer to array of "
10643 "unknown bound %qT")
10644 : G_("parameter %qD includes reference to array of "
10645 "unknown bound %qT"),
10651 else if (init && !processing_template_decl)
10652 init = check_default_argument (decl, init);
10655 DECL_CHAIN (decl) = decls;
10657 result = tree_cons (init, type, result);
10659 decls = nreverse (decls);
10660 result = nreverse (result);
10662 result = chainon (result, void_list_node);
10669 /* D is a constructor or overloaded `operator='.
10671 Let T be the class in which D is declared. Then, this function
10674 -1 if D's is an ill-formed constructor or copy assignment operator
10675 whose first parameter is of type `T'.
10676 0 if D is not a copy constructor or copy assignment
10678 1 if D is a copy constructor or copy assignment operator whose
10679 first parameter is a reference to non-const qualified T.
10680 2 if D is a copy constructor or copy assignment operator whose
10681 first parameter is a reference to const qualified T.
10683 This function can be used as a predicate. Positive values indicate
10684 a copy constructor and nonzero values indicate a copy assignment
10688 copy_fn_p (const_tree d)
10694 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10696 if (TREE_CODE (d) == TEMPLATE_DECL
10697 || (DECL_TEMPLATE_INFO (d)
10698 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10699 /* Instantiations of template member functions are never copy
10700 functions. Note that member functions of templated classes are
10701 represented as template functions internally, and we must
10702 accept those as copy functions. */
10705 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10709 arg_type = TREE_VALUE (args);
10710 if (arg_type == error_mark_node)
10713 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10715 /* Pass by value copy assignment operator. */
10718 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10719 && !TYPE_REF_IS_RVALUE (arg_type)
10720 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10722 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10728 args = TREE_CHAIN (args);
10730 if (args && args != void_list_node && !TREE_PURPOSE (args))
10731 /* There are more non-optional args. */
10737 /* D is a constructor or overloaded `operator='.
10739 Let T be the class in which D is declared. Then, this function
10740 returns true when D is a move constructor or move assignment
10741 operator, false otherwise. */
10744 move_fn_p (const_tree d)
10748 bool result = false;
10750 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10752 if (cxx_dialect == cxx98)
10753 /* There are no move constructors if we are in C++98 mode. */
10756 if (TREE_CODE (d) == TEMPLATE_DECL
10757 || (DECL_TEMPLATE_INFO (d)
10758 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10759 /* Instantiations of template member functions are never copy
10760 functions. Note that member functions of templated classes are
10761 represented as template functions internally, and we must
10762 accept those as copy functions. */
10765 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10769 arg_type = TREE_VALUE (args);
10770 if (arg_type == error_mark_node)
10773 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10774 && TYPE_REF_IS_RVALUE (arg_type)
10775 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10779 args = TREE_CHAIN (args);
10781 if (args && args != void_list_node && !TREE_PURPOSE (args))
10782 /* There are more non-optional args. */
10788 /* Remember any special properties of member function DECL. */
10791 grok_special_member_properties (tree decl)
10795 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10798 class_type = DECL_CONTEXT (decl);
10799 if (DECL_CONSTRUCTOR_P (decl))
10801 int ctor = copy_fn_p (decl);
10803 if (!DECL_ARTIFICIAL (decl))
10804 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10810 A non-template constructor for class X is a copy
10811 constructor if its first parameter is of type X&, const
10812 X&, volatile X& or const volatile X&, and either there
10813 are no other parameters or else all other parameters have
10814 default arguments. */
10815 TYPE_HAS_COPY_CTOR (class_type) = 1;
10816 if (user_provided_p (decl))
10817 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10819 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10821 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10823 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10824 if (user_provided_p (decl))
10825 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10827 else if (move_fn_p (decl) && user_provided_p (decl))
10828 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10829 else if (is_list_ctor (decl))
10830 TYPE_HAS_LIST_CTOR (class_type) = 1;
10832 if (DECL_DECLARED_CONSTEXPR_P (decl)
10833 && !copy_fn_p (decl) && !move_fn_p (decl))
10834 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10836 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10840 A non-template assignment operator for class X is a copy
10841 assignment operator if its parameter is of type X, X&, const
10842 X&, volatile X& or const volatile X&. */
10844 int assop = copy_fn_p (decl);
10848 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10849 if (user_provided_p (decl))
10850 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10852 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10854 else if (move_fn_p (decl) && user_provided_p (decl))
10855 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10857 /* Destructors are handled in check_methods. */
10860 /* Check a constructor DECL has the correct form. Complains
10861 if the class has a constructor of the form X(X). */
10864 grok_ctor_properties (const_tree ctype, const_tree decl)
10866 int ctor_parm = copy_fn_p (decl);
10872 A declaration of a constructor for a class X is ill-formed if
10873 its first parameter is of type (optionally cv-qualified) X
10874 and either there are no other parameters or else all other
10875 parameters have default arguments.
10877 We *don't* complain about member template instantiations that
10878 have this form, though; they can occur as we try to decide
10879 what constructor to use during overload resolution. Since
10880 overload resolution will never prefer such a constructor to
10881 the non-template copy constructor (which is either explicitly
10882 or implicitly defined), there's no need to worry about their
10883 existence. Theoretically, they should never even be
10884 instantiated, but that's hard to forestall. */
10885 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10893 /* An operator with this code is unary, but can also be binary. */
10896 ambi_op_p (enum tree_code code)
10898 return (code == INDIRECT_REF
10899 || code == ADDR_EXPR
10900 || code == UNARY_PLUS_EXPR
10901 || code == NEGATE_EXPR
10902 || code == PREINCREMENT_EXPR
10903 || code == PREDECREMENT_EXPR);
10906 /* An operator with this name can only be unary. */
10909 unary_op_p (enum tree_code code)
10911 return (code == TRUTH_NOT_EXPR
10912 || code == BIT_NOT_EXPR
10913 || code == COMPONENT_REF
10914 || code == TYPE_EXPR);
10917 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10918 errors are issued for invalid declarations. */
10921 grok_op_properties (tree decl, bool complain)
10923 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10925 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10926 tree name = DECL_NAME (decl);
10927 enum tree_code operator_code;
10932 /* Count the number of arguments and check for ellipsis. */
10933 for (argtype = argtypes, arity = 0;
10934 argtype && argtype != void_list_node;
10935 argtype = TREE_CHAIN (argtype))
10937 ellipsis_p = !argtype;
10939 class_type = DECL_CONTEXT (decl);
10940 if (class_type && !CLASS_TYPE_P (class_type))
10941 class_type = NULL_TREE;
10943 if (DECL_CONV_FN_P (decl))
10944 operator_code = TYPE_EXPR;
10948 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10949 if (ansi_opname (CODE) == name) \
10951 operator_code = (CODE); \
10954 else if (ansi_assopname (CODE) == name) \
10956 operator_code = (CODE); \
10957 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10961 #include "operators.def"
10962 #undef DEF_OPERATOR
10964 gcc_unreachable ();
10967 gcc_assert (operator_code != MAX_TREE_CODES);
10968 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10971 switch (operator_code)
10974 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10978 TYPE_GETS_DELETE (class_type) |= 1;
10982 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10985 case VEC_DELETE_EXPR:
10986 TYPE_GETS_DELETE (class_type) |= 2;
10993 /* [basic.std.dynamic.allocation]/1:
10995 A program is ill-formed if an allocation function is declared
10996 in a namespace scope other than global scope or declared static
10999 The same also holds true for deallocation functions. */
11000 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
11001 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
11003 if (DECL_NAMESPACE_SCOPE_P (decl))
11005 if (CP_DECL_CONTEXT (decl) != global_namespace)
11007 error ("%qD may not be declared within a namespace", decl);
11010 else if (!TREE_PUBLIC (decl))
11012 error ("%qD may not be declared as static", decl);
11018 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
11020 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
11021 DECL_IS_OPERATOR_NEW (decl) = 1;
11023 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
11024 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
11027 /* An operator function must either be a non-static member function
11028 or have at least one parameter of a class, a reference to a class,
11029 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11030 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
11032 if (operator_code == TYPE_EXPR
11033 || operator_code == CALL_EXPR
11034 || operator_code == COMPONENT_REF
11035 || operator_code == ARRAY_REF
11036 || operator_code == NOP_EXPR)
11038 error ("%qD must be a nonstatic member function", decl);
11045 if (DECL_STATIC_FUNCTION_P (decl))
11047 error ("%qD must be either a non-static member "
11048 "function or a non-member function", decl);
11052 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
11054 tree arg = non_reference (TREE_VALUE (p));
11055 if (arg == error_mark_node)
11058 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11059 because these checks are performed even on
11060 template functions. */
11061 if (MAYBE_CLASS_TYPE_P (arg)
11062 || TREE_CODE (arg) == ENUMERAL_TYPE)
11066 if (!p || p == void_list_node)
11069 error ("%qD must have an argument of class or "
11070 "enumerated type", decl);
11076 /* There are no restrictions on the arguments to an overloaded
11078 if (operator_code == CALL_EXPR)
11081 /* Warn about conversion operators that will never be used. */
11082 if (IDENTIFIER_TYPENAME_P (name)
11083 && ! DECL_TEMPLATE_INFO (decl)
11085 /* Warn only declaring the function; there is no need to
11086 warn again about out-of-class definitions. */
11087 && class_type == current_class_type)
11089 tree t = TREE_TYPE (name);
11090 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
11093 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
11095 if (TREE_CODE (t) == VOID_TYPE)
11096 warning (OPT_Wconversion,
11098 ? G_("conversion to a reference to void "
11099 "will never use a type conversion operator")
11100 : G_("conversion to void "
11101 "will never use a type conversion operator"));
11102 else if (class_type)
11104 if (t == class_type)
11105 warning (OPT_Wconversion,
11107 ? G_("conversion to a reference to the same type "
11108 "will never use a type conversion operator")
11109 : G_("conversion to the same type "
11110 "will never use a type conversion operator"));
11111 /* Don't force t to be complete here. */
11112 else if (MAYBE_CLASS_TYPE_P (t)
11113 && COMPLETE_TYPE_P (t)
11114 && DERIVED_FROM_P (t, class_type))
11115 warning (OPT_Wconversion,
11117 ? G_("conversion to a reference to a base class "
11118 "will never use a type conversion operator")
11119 : G_("conversion to a base class "
11120 "will never use a type conversion operator"));
11125 if (operator_code == COND_EXPR)
11128 error ("ISO C++ prohibits overloading operator ?:");
11131 else if (ellipsis_p)
11133 error ("%qD must not have variable number of arguments", decl);
11136 else if (ambi_op_p (operator_code))
11139 /* We pick the one-argument operator codes by default, so
11140 we don't have to change anything. */
11142 else if (arity == 2)
11144 /* If we thought this was a unary operator, we now know
11145 it to be a binary operator. */
11146 switch (operator_code)
11149 operator_code = MULT_EXPR;
11153 operator_code = BIT_AND_EXPR;
11156 case UNARY_PLUS_EXPR:
11157 operator_code = PLUS_EXPR;
11161 operator_code = MINUS_EXPR;
11164 case PREINCREMENT_EXPR:
11165 operator_code = POSTINCREMENT_EXPR;
11168 case PREDECREMENT_EXPR:
11169 operator_code = POSTDECREMENT_EXPR;
11173 gcc_unreachable ();
11176 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
11178 if ((operator_code == POSTINCREMENT_EXPR
11179 || operator_code == POSTDECREMENT_EXPR)
11180 && ! processing_template_decl
11181 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11184 error ("postfix %qD must take %<int%> as its argument",
11187 error ("postfix %qD must take %<int%> as its second "
11195 error ("%qD must take either zero or one argument", decl);
11197 error ("%qD must take either one or two arguments", decl);
11201 /* More Effective C++ rule 6. */
11203 && (operator_code == POSTINCREMENT_EXPR
11204 || operator_code == POSTDECREMENT_EXPR
11205 || operator_code == PREINCREMENT_EXPR
11206 || operator_code == PREDECREMENT_EXPR))
11208 tree arg = TREE_VALUE (argtypes);
11209 tree ret = TREE_TYPE (TREE_TYPE (decl));
11210 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11211 arg = TREE_TYPE (arg);
11212 arg = TYPE_MAIN_VARIANT (arg);
11213 if (operator_code == PREINCREMENT_EXPR
11214 || operator_code == PREDECREMENT_EXPR)
11216 if (TREE_CODE (ret) != REFERENCE_TYPE
11217 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11219 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11220 build_reference_type (arg));
11224 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11225 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11229 else if (unary_op_p (operator_code))
11234 error ("%qD must take %<void%>", decl);
11236 error ("%qD must take exactly one argument", decl);
11240 else /* if (binary_op_p (operator_code)) */
11245 error ("%qD must take exactly one argument", decl);
11247 error ("%qD must take exactly two arguments", decl);
11251 /* More Effective C++ rule 7. */
11253 && (operator_code == TRUTH_ANDIF_EXPR
11254 || operator_code == TRUTH_ORIF_EXPR
11255 || operator_code == COMPOUND_EXPR))
11256 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11260 /* Effective C++ rule 23. */
11263 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11264 && (operator_code == PLUS_EXPR
11265 || operator_code == MINUS_EXPR
11266 || operator_code == TRUNC_DIV_EXPR
11267 || operator_code == MULT_EXPR
11268 || operator_code == TRUNC_MOD_EXPR)
11269 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11270 warning (OPT_Weffc__, "%qD should return by value", decl);
11272 /* [over.oper]/8 */
11273 for (; argtypes && argtypes != void_list_node;
11274 argtypes = TREE_CHAIN (argtypes))
11275 if (TREE_PURPOSE (argtypes))
11277 TREE_PURPOSE (argtypes) = NULL_TREE;
11278 if (operator_code == POSTINCREMENT_EXPR
11279 || operator_code == POSTDECREMENT_EXPR)
11281 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11286 error ("%qD cannot have default arguments", decl);
11294 /* Return a string giving the keyword associate with CODE. */
11296 static const char *
11297 tag_name (enum tag_types code)
11309 case typename_type:
11312 gcc_unreachable ();
11316 /* Name lookup in an elaborated-type-specifier (after the keyword
11317 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11318 elaborated-type-specifier is invalid, issue a diagnostic and return
11319 error_mark_node; otherwise, return the *_TYPE to which it referred.
11320 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11323 check_elaborated_type_specifier (enum tag_types tag_code,
11325 bool allow_template_p)
11331 struct S { struct S *p; };
11333 name lookup will find the TYPE_DECL for the implicit "S::S"
11334 typedef. Adjust for that here. */
11335 if (DECL_SELF_REFERENCE_P (decl))
11336 decl = TYPE_NAME (TREE_TYPE (decl));
11338 type = TREE_TYPE (decl);
11340 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11341 is false for this case as well. */
11342 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11344 error ("using template type parameter %qT after %qs",
11345 type, tag_name (tag_code));
11346 return error_mark_node;
11350 If the identifier resolves to a typedef-name or a template
11351 type-parameter, the elaborated-type-specifier is ill-formed.
11353 In other words, the only legitimate declaration to use in the
11354 elaborated type specifier is the implicit typedef created when
11355 the type is declared. */
11356 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11357 && !DECL_SELF_REFERENCE_P (decl)
11358 && tag_code != typename_type)
11360 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11361 error ("%q+D has a previous declaration here", decl);
11362 return error_mark_node;
11364 else if (TREE_CODE (type) != RECORD_TYPE
11365 && TREE_CODE (type) != UNION_TYPE
11366 && tag_code != enum_type
11367 && tag_code != typename_type)
11369 error ("%qT referred to as %qs", type, tag_name (tag_code));
11370 error ("%q+T has a previous declaration here", type);
11371 return error_mark_node;
11373 else if (TREE_CODE (type) != ENUMERAL_TYPE
11374 && tag_code == enum_type)
11376 error ("%qT referred to as enum", type);
11377 error ("%q+T has a previous declaration here", type);
11378 return error_mark_node;
11380 else if (!allow_template_p
11381 && TREE_CODE (type) == RECORD_TYPE
11382 && CLASSTYPE_IS_TEMPLATE (type))
11384 /* If a class template appears as elaborated type specifier
11385 without a template header such as:
11387 template <class T> class C {};
11388 void f(class C); // No template header here
11390 then the required template argument is missing. */
11391 error ("template argument required for %<%s %T%>",
11392 tag_name (tag_code),
11393 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11394 return error_mark_node;
11400 /* Lookup NAME in elaborate type specifier in scope according to
11401 SCOPE and issue diagnostics if necessary.
11402 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11403 found, and ERROR_MARK_NODE for type error. */
11406 lookup_and_check_tag (enum tag_types tag_code, tree name,
11407 tag_scope scope, bool template_header_p)
11411 if (scope == ts_global)
11413 /* First try ordinary name lookup, ignoring hidden class name
11414 injected via friend declaration. */
11415 decl = lookup_name_prefer_type (name, 2);
11416 /* If that fails, the name will be placed in the smallest
11417 non-class, non-function-prototype scope according to 3.3.1/5.
11418 We may already have a hidden name declared as friend in this
11419 scope. So lookup again but not ignoring hidden names.
11420 If we find one, that name will be made visible rather than
11421 creating a new tag. */
11423 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11426 decl = lookup_type_scope (name, scope);
11428 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11429 decl = DECL_TEMPLATE_RESULT (decl);
11431 if (decl && TREE_CODE (decl) == TYPE_DECL)
11433 /* Look for invalid nested type:
11437 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11439 error ("%qD has the same name as the class in which it is "
11442 return error_mark_node;
11445 /* Two cases we need to consider when deciding if a class
11446 template is allowed as an elaborated type specifier:
11447 1. It is a self reference to its own class.
11448 2. It comes with a template header.
11452 template <class T> class C {
11453 class C *c1; // DECL_SELF_REFERENCE_P is true
11456 template <class U> class C; // template_header_p is true
11457 template <class T> class C<T>::D {
11458 class C *c2; // DECL_SELF_REFERENCE_P is true
11461 t = check_elaborated_type_specifier (tag_code,
11464 | DECL_SELF_REFERENCE_P (decl));
11467 else if (decl && TREE_CODE (decl) == TREE_LIST)
11469 error ("reference to %qD is ambiguous", name);
11470 print_candidates (decl);
11471 return error_mark_node;
11477 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11478 Define the tag as a forward-reference if it is not defined.
11480 If a declaration is given, process it here, and report an error if
11481 multiple declarations are not identical.
11483 SCOPE is TS_CURRENT when this is also a definition. Only look in
11484 the current frame for the name (since C++ allows new names in any
11485 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11486 declaration. Only look beginning from the current scope outward up
11487 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11489 TEMPLATE_HEADER_P is true when this declaration is preceded by
11490 a set of template parameters. */
11493 xref_tag_1 (enum tag_types tag_code, tree name,
11494 tag_scope scope, bool template_header_p)
11496 enum tree_code code;
11498 tree context = NULL_TREE;
11500 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11506 code = RECORD_TYPE;
11512 code = ENUMERAL_TYPE;
11515 gcc_unreachable ();
11518 /* In case of anonymous name, xref_tag is only called to
11519 make type node and push name. Name lookup is not required. */
11520 if (ANON_AGGRNAME_P (name))
11523 t = lookup_and_check_tag (tag_code, name,
11524 scope, template_header_p);
11526 if (t == error_mark_node)
11527 return error_mark_node;
11529 if (scope != ts_current && t && current_class_type
11530 && template_class_depth (current_class_type)
11531 && template_header_p)
11533 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11534 definition of this tag. Since, in addition, we are currently
11535 processing a (member) template declaration of a template
11536 class, we must be very careful; consider:
11543 { template <class V>
11544 friend struct S1; };
11546 Here, the S2::S1 declaration should not be confused with the
11547 outer declaration. In particular, the inner version should
11548 have a template parameter of level 2, not level 1. This
11549 would be particularly important if the member declaration
11552 template <class V = U> friend struct S1;
11554 say, when we should tsubst into `U' when instantiating
11555 S2. On the other hand, when presented with:
11565 we must find the inner binding eventually. We
11566 accomplish this by making sure that the new type we
11567 create to represent this declaration has the right
11569 context = TYPE_CONTEXT (t);
11575 /* If no such tag is yet defined, create a forward-reference node
11576 and record it as the "definition".
11577 When a real declaration of this type is found,
11578 the forward-reference will be altered into a real type. */
11579 if (code == ENUMERAL_TYPE)
11581 error ("use of enum %q#D without previous declaration", name);
11582 return error_mark_node;
11586 t = make_class_type (code);
11587 TYPE_CONTEXT (t) = context;
11588 t = pushtag (name, t, scope);
11593 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11595 if (!redeclare_class_template (t, current_template_parms))
11596 return error_mark_node;
11598 else if (!processing_template_decl
11599 && CLASS_TYPE_P (t)
11600 && CLASSTYPE_IS_TEMPLATE (t))
11602 error ("redeclaration of %qT as a non-template", t);
11603 error ("previous declaration %q+D", t);
11604 return error_mark_node;
11607 /* Make injected friend class visible. */
11608 if (scope != ts_within_enclosing_non_class
11609 && hidden_name_p (TYPE_NAME (t)))
11611 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11612 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11614 if (TYPE_TEMPLATE_INFO (t))
11616 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11617 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11625 /* Wrapper for xref_tag_1. */
11628 xref_tag (enum tag_types tag_code, tree name,
11629 tag_scope scope, bool template_header_p)
11633 subtime = timevar_cond_start (TV_NAME_LOOKUP);
11634 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11635 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
11641 xref_tag_from_type (tree old, tree id, tag_scope scope)
11643 enum tag_types tag_kind;
11645 if (TREE_CODE (old) == RECORD_TYPE)
11646 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11648 tag_kind = union_type;
11650 if (id == NULL_TREE)
11651 id = TYPE_IDENTIFIER (old);
11653 return xref_tag (tag_kind, id, scope, false);
11656 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11657 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11658 access_* node, and the TREE_VALUE is the type of the base-class.
11659 Non-NULL TREE_TYPE indicates virtual inheritance.
11661 Returns true if the binfo hierarchy was successfully created,
11662 false if an error was detected. */
11665 xref_basetypes (tree ref, tree base_list)
11668 tree binfo, base_binfo;
11669 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11670 unsigned max_bases = 0; /* Maximum direct bases. */
11672 tree default_access;
11673 tree igo_prev; /* Track Inheritance Graph Order. */
11675 if (ref == error_mark_node)
11678 /* The base of a derived class is private by default, all others are
11680 default_access = (TREE_CODE (ref) == RECORD_TYPE
11681 && CLASSTYPE_DECLARED_CLASS (ref)
11682 ? access_private_node : access_public_node);
11684 /* First, make sure that any templates in base-classes are
11685 instantiated. This ensures that if we call ourselves recursively
11686 we do not get confused about which classes are marked and which
11688 basep = &base_list;
11691 tree basetype = TREE_VALUE (*basep);
11693 if (!(processing_template_decl && uses_template_parms (basetype))
11694 && !complete_type_or_else (basetype, NULL))
11695 /* An incomplete type. Remove it from the list. */
11696 *basep = TREE_CHAIN (*basep);
11700 if (TREE_TYPE (*basep))
11702 if (CLASS_TYPE_P (basetype))
11703 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11704 basep = &TREE_CHAIN (*basep);
11708 TYPE_MARKED_P (ref) = 1;
11710 /* The binfo slot should be empty, unless this is an (ill-formed)
11712 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11714 error ("redefinition of %q#T", ref);
11718 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11720 binfo = make_tree_binfo (max_bases);
11722 TYPE_BINFO (ref) = binfo;
11723 BINFO_OFFSET (binfo) = size_zero_node;
11724 BINFO_TYPE (binfo) = ref;
11726 /* Apply base-class info set up to the variants of this type. */
11727 fixup_type_variants (ref);
11731 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11732 /* An aggregate cannot have baseclasses. */
11733 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11735 if (TREE_CODE (ref) == UNION_TYPE)
11737 error ("derived union %qT invalid", ref);
11744 if (TYPE_FOR_JAVA (ref))
11746 error ("Java class %qT cannot have multiple bases", ref);
11753 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11755 if (TYPE_FOR_JAVA (ref))
11757 error ("Java class %qT cannot have virtual bases", ref);
11762 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11764 tree access = TREE_PURPOSE (base_list);
11765 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11766 tree basetype = TREE_VALUE (base_list);
11768 if (access == access_default_node)
11769 access = default_access;
11771 if (PACK_EXPANSION_P (basetype))
11772 basetype = PACK_EXPANSION_PATTERN (basetype);
11773 if (TREE_CODE (basetype) == TYPE_DECL)
11774 basetype = TREE_TYPE (basetype);
11775 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11777 error ("base type %qT fails to be a struct or class type",
11782 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11783 TYPE_FOR_JAVA (ref) = 1;
11785 base_binfo = NULL_TREE;
11786 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11788 base_binfo = TYPE_BINFO (basetype);
11789 /* The original basetype could have been a typedef'd type. */
11790 basetype = BINFO_TYPE (base_binfo);
11792 /* Inherit flags from the base. */
11793 TYPE_HAS_NEW_OPERATOR (ref)
11794 |= TYPE_HAS_NEW_OPERATOR (basetype);
11795 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11796 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11797 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11798 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11799 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11800 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11801 CLASSTYPE_REPEATED_BASE_P (ref)
11802 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11805 /* We must do this test after we've seen through a typedef
11807 if (TYPE_MARKED_P (basetype))
11809 if (basetype == ref)
11810 error ("recursive type %qT undefined", basetype);
11812 error ("duplicate base type %qT invalid", basetype);
11816 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11817 /* Regenerate the pack expansion for the bases. */
11818 basetype = make_pack_expansion (basetype);
11820 TYPE_MARKED_P (basetype) = 1;
11822 base_binfo = copy_binfo (base_binfo, basetype, ref,
11823 &igo_prev, via_virtual);
11824 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11825 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11827 BINFO_BASE_APPEND (binfo, base_binfo);
11828 BINFO_BASE_ACCESS_APPEND (binfo, access);
11831 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11832 /* If we have space in the vbase vector, we must have shared at
11833 least one of them, and are therefore diamond shaped. */
11834 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11836 /* Unmark all the types. */
11837 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11838 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11839 TYPE_MARKED_P (ref) = 0;
11841 /* Now see if we have a repeated base type. */
11842 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11844 for (base_binfo = binfo; base_binfo;
11845 base_binfo = TREE_CHAIN (base_binfo))
11847 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11849 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11852 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11854 for (base_binfo = binfo; base_binfo;
11855 base_binfo = TREE_CHAIN (base_binfo))
11856 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11857 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11866 /* Copies the enum-related properties from type SRC to type DST.
11867 Used with the underlying type of an enum and the enum itself. */
11869 copy_type_enum (tree dst, tree src)
11871 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11872 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11873 TYPE_SIZE (dst) = TYPE_SIZE (src);
11874 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11875 SET_TYPE_MODE (dst, TYPE_MODE (src));
11876 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11877 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11878 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11879 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11882 /* Begin compiling the definition of an enumeration type.
11885 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11887 UNDERLYING_TYPE is the type that will be used as the storage for
11888 the enumeration type. This should be NULL_TREE if no storage type
11891 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11893 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11895 Returns the type object, as yet incomplete.
11896 Also records info about it so that build_enumerator
11897 may be used to declare the individual values as they are read. */
11900 start_enum (tree name, tree enumtype, tree underlying_type,
11901 bool scoped_enum_p, bool *is_new)
11903 tree prevtype = NULL_TREE;
11904 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11908 /* [C++0x dcl.enum]p5:
11910 If not explicitly specified, the underlying type of a scoped
11911 enumeration type is int. */
11912 if (!underlying_type && scoped_enum_p)
11913 underlying_type = integer_type_node;
11915 if (underlying_type)
11916 underlying_type = cv_unqualified (underlying_type);
11918 /* If this is the real definition for a previous forward reference,
11919 fill in the contents in the same object that used to be the
11920 forward reference. */
11922 enumtype = lookup_and_check_tag (enum_type, name,
11923 /*tag_scope=*/ts_current,
11924 /*template_header_p=*/false);
11926 /* In case of a template_decl, the only check that should be deferred
11927 to instantiation time is the comparison of underlying types. */
11928 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11930 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11932 error_at (input_location, "scoped/unscoped mismatch "
11933 "in enum %q#T", enumtype);
11934 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11935 "previous definition here");
11936 enumtype = error_mark_node;
11938 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11940 error_at (input_location, "underlying type mismatch "
11941 "in enum %q#T", enumtype);
11942 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11943 "previous definition here");
11944 enumtype = error_mark_node;
11946 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11947 && !dependent_type_p (underlying_type)
11948 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11949 && !same_type_p (underlying_type,
11950 ENUM_UNDERLYING_TYPE (enumtype)))
11952 error_at (input_location, "different underlying type "
11953 "in enum %q#T", enumtype);
11954 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11955 "previous definition here");
11956 underlying_type = NULL_TREE;
11960 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11961 || processing_template_decl)
11963 /* In case of error, make a dummy enum to allow parsing to
11965 if (enumtype == error_mark_node)
11967 name = make_anon_name ();
11968 enumtype = NULL_TREE;
11971 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11972 of an opaque enum, or an opaque enum of an already defined
11973 enumeration (C++0x only).
11974 In any other case, it'll be NULL_TREE. */
11980 prevtype = enumtype;
11981 enumtype = cxx_make_type (ENUMERAL_TYPE);
11982 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11983 if (enumtype == error_mark_node)
11984 return error_mark_node;
11986 /* The enum is considered opaque until the opening '{' of the
11987 enumerator list. */
11988 SET_OPAQUE_ENUM_P (enumtype, true);
11989 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11992 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11994 if (underlying_type)
11996 if (CP_INTEGRAL_TYPE_P (underlying_type))
11998 copy_type_enum (enumtype, underlying_type);
11999 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
12001 else if (dependent_type_p (underlying_type))
12002 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
12004 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12005 underlying_type, enumtype);
12008 /* If into a template class, the returned enum is always the first
12009 declaration (opaque or not) seen. This way all the references to
12010 this type will be to the same declaration. The following ones are used
12011 only to check for definition errors. */
12012 if (prevtype && processing_template_decl)
12018 /* After processing and defining all the values of an enumeration type,
12019 install their decls in the enumeration type.
12020 ENUMTYPE is the type object. */
12023 finish_enum_value_list (tree enumtype)
12026 tree underlying_type;
12029 tree minnode, maxnode;
12032 bool fixed_underlying_type_p
12033 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
12035 /* We built up the VALUES in reverse order. */
12036 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
12038 /* For an enum defined in a template, just set the type of the values;
12039 all further processing is postponed until the template is
12040 instantiated. We need to set the type so that tsubst of a CONST_DECL
12042 if (processing_template_decl)
12044 for (values = TYPE_VALUES (enumtype);
12046 values = TREE_CHAIN (values))
12047 TREE_TYPE (TREE_VALUE (values)) = enumtype;
12051 /* Determine the minimum and maximum values of the enumerators. */
12052 if (TYPE_VALUES (enumtype))
12054 minnode = maxnode = NULL_TREE;
12056 for (values = TYPE_VALUES (enumtype);
12058 values = TREE_CHAIN (values))
12060 decl = TREE_VALUE (values);
12062 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12063 each enumerator has the type of its enumeration. Prior to the
12064 closing brace, the type of each enumerator is the type of its
12065 initializing value. */
12066 TREE_TYPE (decl) = enumtype;
12068 /* Update the minimum and maximum values, if appropriate. */
12069 value = DECL_INITIAL (decl);
12070 if (value == error_mark_node)
12071 value = integer_zero_node;
12072 /* Figure out what the minimum and maximum values of the
12073 enumerators are. */
12075 minnode = maxnode = value;
12076 else if (tree_int_cst_lt (maxnode, value))
12078 else if (tree_int_cst_lt (value, minnode))
12085 If the enumerator-list is empty, the underlying type is as if
12086 the enumeration had a single enumerator with value 0. */
12087 minnode = maxnode = integer_zero_node;
12089 if (!fixed_underlying_type_p)
12091 /* Compute the number of bits require to represent all values of the
12092 enumeration. We must do this before the type of MINNODE and
12093 MAXNODE are transformed, since tree_int_cst_min_precision relies
12094 on the TREE_TYPE of the value it is passed. */
12095 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
12096 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
12097 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
12098 int precision = MAX (lowprec, highprec);
12100 bool use_short_enum;
12102 /* Determine the underlying type of the enumeration.
12106 The underlying type of an enumeration is an integral type that
12107 can represent all the enumerator values defined in the
12108 enumeration. It is implementation-defined which integral type is
12109 used as the underlying type for an enumeration except that the
12110 underlying type shall not be larger than int unless the value of
12111 an enumerator cannot fit in an int or unsigned int.
12113 We use "int" or an "unsigned int" as the underlying type, even if
12114 a smaller integral type would work, unless the user has
12115 explicitly requested that we use the smallest possible type. The
12116 user can request that for all enumerations with a command line
12117 flag, or for just one enumeration with an attribute. */
12119 use_short_enum = flag_short_enums
12120 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
12122 for (itk = (use_short_enum ? itk_char : itk_int);
12126 underlying_type = integer_types[itk];
12127 if (underlying_type != NULL_TREE
12128 && TYPE_PRECISION (underlying_type) >= precision
12129 && TYPE_UNSIGNED (underlying_type) == unsignedp)
12132 if (itk == itk_none)
12136 IF no integral type can represent all the enumerator values, the
12137 enumeration is ill-formed. */
12138 error ("no integral type can represent all of the enumerator values "
12139 "for %qT", enumtype);
12140 precision = TYPE_PRECISION (long_long_integer_type_node);
12141 underlying_type = integer_types[itk_unsigned_long_long];
12146 The value of sizeof() applied to an enumeration type, an object
12147 of an enumeration type, or an enumerator, is the value of sizeof()
12148 applied to the underlying type. */
12149 copy_type_enum (enumtype, underlying_type);
12151 /* Compute the minimum and maximum values for the type.
12155 For an enumeration where emin is the smallest enumerator and emax
12156 is the largest, the values of the enumeration are the values of the
12157 underlying type in the range bmin to bmax, where bmin and bmax are,
12158 respectively, the smallest and largest values of the smallest bit-
12159 field that can store emin and emax. */
12161 /* The middle-end currently assumes that types with TYPE_PRECISION
12162 narrower than their underlying type are suitably zero or sign
12163 extended to fill their mode. Similarly, it assumes that the front
12164 end assures that a value of a particular type must be within
12165 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12167 We used to set these fields based on bmin and bmax, but that led
12168 to invalid assumptions like optimizing away bounds checking. So
12169 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12170 TYPE_MAX_VALUE to the values for the mode above and only restrict
12171 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12172 ENUM_UNDERLYING_TYPE (enumtype)
12173 = build_distinct_type_copy (underlying_type);
12174 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
12175 set_min_and_max_values_for_integral_type
12176 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
12178 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12179 if (flag_strict_enums)
12180 set_min_and_max_values_for_integral_type (enumtype, precision,
12184 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
12186 /* Convert each of the enumerators to the type of the underlying
12187 type of the enumeration. */
12188 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12190 location_t saved_location;
12192 decl = TREE_VALUE (values);
12193 saved_location = input_location;
12194 input_location = DECL_SOURCE_LOCATION (decl);
12195 if (fixed_underlying_type_p)
12196 /* If the enumeration type has a fixed underlying type, we
12197 already checked all of the enumerator values. */
12198 value = DECL_INITIAL (decl);
12200 value = perform_implicit_conversion (underlying_type,
12201 DECL_INITIAL (decl),
12202 tf_warning_or_error);
12203 input_location = saved_location;
12205 /* Do not clobber shared ints. */
12206 value = copy_node (value);
12208 TREE_TYPE (value) = enumtype;
12209 DECL_INITIAL (decl) = value;
12212 /* Fix up all variant types of this enum type. */
12213 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12214 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12216 /* Finish debugging output for this type. */
12217 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12220 /* Finishes the enum type. This is called only the first time an
12221 enumeration is seen, be it opaque or odinary.
12222 ENUMTYPE is the type object. */
12225 finish_enum (tree enumtype)
12227 if (processing_template_decl)
12229 if (at_function_scope_p ())
12230 add_stmt (build_min (TAG_DEFN, enumtype));
12234 /* Here there should not be any variants of this type. */
12235 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12236 && !TYPE_NEXT_VARIANT (enumtype));
12239 /* Build and install a CONST_DECL for an enumeration constant of the
12240 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12241 LOC is the location of NAME.
12242 Assignment of sequential values by default is handled here. */
12245 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12251 /* If the VALUE was erroneous, pretend it wasn't there; that will
12252 result in the enum being assigned the next value in sequence. */
12253 if (value == error_mark_node)
12256 /* Remove no-op casts from the value. */
12258 STRIP_TYPE_NOPS (value);
12260 if (! processing_template_decl)
12262 /* Validate and default VALUE. */
12263 if (value != NULL_TREE)
12265 value = cxx_constant_value (value);
12267 if (TREE_CODE (value) == INTEGER_CST
12268 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12270 value = perform_integral_promotions (value);
12274 error ("enumerator value for %qD is not an integer constant", name);
12279 /* Default based on previous value. */
12280 if (value == NULL_TREE)
12282 if (TYPE_VALUES (enumtype))
12285 unsigned HOST_WIDE_INT lo;
12289 /* C++03 7.2/4: If no initializer is specified for the first
12290 enumerator, the type is an unspecified integral
12291 type. Otherwise the type is the same as the type of the
12292 initializing value of the preceding enumerator unless the
12293 incremented value is not representable in that type, in
12294 which case the type is an unspecified integral type
12295 sufficient to contain the incremented value. */
12296 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12297 if (error_operand_p (prev_value))
12298 value = error_mark_node;
12301 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12302 TREE_INT_CST_HIGH (prev_value),
12307 tree type = TREE_TYPE (prev_value);
12308 bool pos = (TYPE_UNSIGNED (type) || hi >= 0);
12309 di.low = lo; di.high = hi;
12310 if (!double_int_fits_to_tree_p (type, di))
12313 for (itk = itk_int; itk != itk_none; itk++)
12315 type = integer_types[itk];
12316 if (type != NULL_TREE
12317 && (pos || !TYPE_UNSIGNED (type))
12318 && double_int_fits_to_tree_p (type, di))
12321 if (type && cxx_dialect < cxx0x
12322 && itk > itk_unsigned_long)
12323 pedwarn (input_location, OPT_Wlong_long, pos ? "\
12324 incremented enumerator value is too large for %<unsigned long%>" : "\
12325 incremented enumerator value is too large for %<long%>");
12327 if (type == NULL_TREE)
12330 value = double_int_to_tree (type, di);
12335 error ("overflow in enumeration values at %qD", name);
12336 value = error_mark_node;
12341 value = integer_zero_node;
12344 /* Remove no-op casts from the value. */
12345 STRIP_TYPE_NOPS (value);
12347 /* If the underlying type of the enum is fixed, check whether
12348 the enumerator values fits in the underlying type. If it
12349 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12350 if (ENUM_UNDERLYING_TYPE (enumtype)
12352 && TREE_CODE (value) == INTEGER_CST
12353 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12355 error ("enumerator value %E is too large for underlying type %<%T%>",
12356 value, ENUM_UNDERLYING_TYPE (enumtype));
12358 /* Silently convert the value so that we can continue. */
12359 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12364 /* C++ associates enums with global, function, or class declarations. */
12365 context = current_scope ();
12367 /* Build the actual enumeration constant. Note that the enumeration
12368 constants have the underlying type of the enum (if it is fixed)
12369 or the type of their initializer (if the underlying type of the
12370 enum is not fixed):
12374 If the underlying type is fixed, the type of each enumerator
12375 prior to the closing brace is the underlying type; if the
12376 initializing value of an enumerator cannot be represented by
12377 the underlying type, the program is ill-formed. If the
12378 underlying type is not fixed, the type of each enumerator is
12379 the type of its initializing value.
12381 If the underlying type is not fixed, it will be computed by
12382 finish_enum and we will reset the type of this enumerator. Of
12383 course, if we're processing a template, there may be no value. */
12384 type = value ? TREE_TYPE (value) : NULL_TREE;
12386 if (context && context == current_class_type)
12387 /* This enum declaration is local to the class. We need the full
12388 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12389 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12391 /* It's a global enum, or it's local to a function. (Note local to
12392 a function could mean local to a class method. */
12393 decl = build_decl (loc, CONST_DECL, name, type);
12395 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12396 TREE_CONSTANT (decl) = 1;
12397 TREE_READONLY (decl) = 1;
12398 DECL_INITIAL (decl) = value;
12400 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12401 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12402 on the TYPE_FIELDS list for `S'. (That's so that you can say
12403 things like `S::i' later.) */
12404 finish_member_declaration (decl);
12408 /* Add this enumeration constant to the list for this type. */
12409 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12412 /* Look for an enumerator with the given NAME within the enumeration
12413 type ENUMTYPE. This routine is used primarily for qualified name
12414 lookup into an enumerator in C++0x, e.g.,
12416 enum class Color { Red, Green, Blue };
12418 Color color = Color::Red;
12420 Returns the value corresponding to the enumerator, or
12421 NULL_TREE if no such enumerator was found. */
12423 lookup_enumerator (tree enumtype, tree name)
12426 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12428 e = purpose_member (name, TYPE_VALUES (enumtype));
12429 return e? TREE_VALUE (e) : NULL_TREE;
12433 /* We're defining DECL. Make sure that its type is OK. */
12436 check_function_type (tree decl, tree current_function_parms)
12438 tree fntype = TREE_TYPE (decl);
12439 tree return_type = complete_type (TREE_TYPE (fntype));
12441 /* In a function definition, arg types must be complete. */
12442 require_complete_types_for_parms (current_function_parms);
12444 if (dependent_type_p (return_type))
12446 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12447 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12449 tree args = TYPE_ARG_TYPES (fntype);
12451 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12452 error ("return type %q#T is incomplete", return_type);
12454 error ("return type has Java class type %q#T", return_type);
12456 /* Make it return void instead. */
12457 if (TREE_CODE (fntype) == METHOD_TYPE)
12458 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12460 TREE_CHAIN (args));
12462 fntype = build_function_type (void_type_node, args);
12464 = build_exception_variant (fntype,
12465 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12466 fntype = (cp_build_type_attribute_variant
12467 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12468 TREE_TYPE (decl) = fntype;
12471 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12474 /* Create the FUNCTION_DECL for a function definition.
12475 DECLSPECS and DECLARATOR are the parts of the declaration;
12476 they describe the function's name and the type it returns,
12477 but twisted together in a fashion that parallels the syntax of C.
12479 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12480 DECLARATOR is really the DECL for the function we are about to
12481 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12482 indicating that the function is an inline defined in-class.
12484 This function creates a binding context for the function body
12485 as well as setting up the FUNCTION_DECL in current_function_decl.
12487 For C++, we must first check whether that datum makes any sense.
12488 For example, "class A local_a(1,2);" means that variable local_a
12489 is an aggregate of type A, which should have a constructor
12490 applied to it with the argument list [1, 2].
12492 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12493 or may be a BLOCK if the function has been defined previously
12494 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12495 error_mark_node if the function has never been defined, or
12496 a BLOCK if the function has been defined somewhere. */
12499 start_preparsed_function (tree decl1, tree attrs, int flags)
12501 tree ctype = NULL_TREE;
12504 int doing_friend = 0;
12505 cp_binding_level *bl;
12506 tree current_function_parms;
12507 struct c_fileinfo *finfo
12508 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12509 bool honor_interface;
12511 /* Sanity check. */
12512 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12513 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12515 fntype = TREE_TYPE (decl1);
12516 if (TREE_CODE (fntype) == METHOD_TYPE)
12517 ctype = TYPE_METHOD_BASETYPE (fntype);
12519 /* ISO C++ 11.4/5. A friend function defined in a class is in
12520 the (lexical) scope of the class in which it is defined. */
12521 if (!ctype && DECL_FRIEND_P (decl1))
12523 ctype = DECL_FRIEND_CONTEXT (decl1);
12525 /* CTYPE could be null here if we're dealing with a template;
12526 for example, `inline friend float foo()' inside a template
12527 will have no CTYPE set. */
12528 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12534 if (DECL_DECLARED_INLINE_P (decl1)
12535 && lookup_attribute ("noinline", attrs))
12536 warning (0, "inline function %q+D given attribute noinline", decl1);
12538 /* Handle gnu_inline attribute. */
12539 if (GNU_INLINE_P (decl1))
12541 DECL_EXTERNAL (decl1) = 1;
12542 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12543 DECL_INTERFACE_KNOWN (decl1) = 1;
12544 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12547 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12548 /* This is a constructor, we must ensure that any default args
12549 introduced by this definition are propagated to the clones
12550 now. The clones are used directly in overload resolution. */
12551 adjust_clone_args (decl1);
12553 /* Sometimes we don't notice that a function is a static member, and
12554 build a METHOD_TYPE for it. Fix that up now. */
12555 gcc_assert (!(ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12556 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE));
12558 /* Set up current_class_type, and enter the scope of the class, if
12561 push_nested_class (ctype);
12562 else if (DECL_STATIC_FUNCTION_P (decl1))
12563 push_nested_class (DECL_CONTEXT (decl1));
12565 /* Now that we have entered the scope of the class, we must restore
12566 the bindings for any template parameters surrounding DECL1, if it
12567 is an inline member template. (Order is important; consider the
12568 case where a template parameter has the same name as a field of
12569 the class.) It is not until after this point that
12570 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12571 if (flags & SF_INCLASS_INLINE)
12572 maybe_begin_member_template_processing (decl1);
12574 /* Effective C++ rule 15. */
12576 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12577 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12578 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12580 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12581 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12582 if (!DECL_INITIAL (decl1))
12583 DECL_INITIAL (decl1) = error_mark_node;
12585 /* This function exists in static storage.
12586 (This does not mean `static' in the C sense!) */
12587 TREE_STATIC (decl1) = 1;
12589 /* We must call push_template_decl after current_class_type is set
12590 up. (If we are processing inline definitions after exiting a
12591 class scope, current_class_type will be NULL_TREE until set above
12592 by push_nested_class.) */
12593 if (processing_template_decl)
12595 /* FIXME: Handle error_mark_node more gracefully. */
12596 tree newdecl1 = push_template_decl (decl1);
12597 if (newdecl1 != error_mark_node)
12601 /* We are now in the scope of the function being defined. */
12602 current_function_decl = decl1;
12604 /* Save the parm names or decls from this function's declarator
12605 where store_parm_decls will find them. */
12606 current_function_parms = DECL_ARGUMENTS (decl1);
12608 /* Make sure the parameter and return types are reasonable. When
12609 you declare a function, these types can be incomplete, but they
12610 must be complete when you define the function. */
12611 check_function_type (decl1, current_function_parms);
12613 /* Build the return declaration for the function. */
12614 restype = TREE_TYPE (fntype);
12615 if (DECL_RESULT (decl1) == NULL_TREE)
12619 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12620 DECL_ARTIFICIAL (resdecl) = 1;
12621 DECL_IGNORED_P (resdecl) = 1;
12622 DECL_RESULT (decl1) = resdecl;
12624 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12627 /* Let the user know we're compiling this function. */
12628 announce_function (decl1);
12630 /* Record the decl so that the function name is defined.
12631 If we already have a decl for this name, and it is a FUNCTION_DECL,
12632 use the old decl. */
12633 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12635 /* A specialization is not used to guide overload resolution. */
12636 if (!DECL_FUNCTION_MEMBER_P (decl1)
12637 && !(DECL_USE_TEMPLATE (decl1) &&
12638 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12640 tree olddecl = pushdecl (decl1);
12642 if (olddecl == error_mark_node)
12643 /* If something went wrong when registering the declaration,
12644 use DECL1; we have to have a FUNCTION_DECL to use when
12645 parsing the body of the function. */
12649 /* Otherwise, OLDDECL is either a previous declaration
12650 of the same function or DECL1 itself. */
12652 if (warn_missing_declarations
12653 && olddecl == decl1
12654 && !DECL_MAIN_P (decl1)
12655 && TREE_PUBLIC (decl1)
12656 && !DECL_DECLARED_INLINE_P (decl1))
12660 /* Check whether DECL1 is in an anonymous
12662 for (context = DECL_CONTEXT (decl1);
12664 context = DECL_CONTEXT (context))
12666 if (TREE_CODE (context) == NAMESPACE_DECL
12667 && DECL_NAME (context) == NULL_TREE)
12671 if (context == NULL)
12672 warning (OPT_Wmissing_declarations,
12673 "no previous declaration for %q+D", decl1);
12681 /* We need to set the DECL_CONTEXT. */
12682 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12683 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12685 fntype = TREE_TYPE (decl1);
12687 /* If #pragma weak applies, mark the decl appropriately now.
12688 The pragma only applies to global functions. Because
12689 determining whether or not the #pragma applies involves
12690 computing the mangled name for the declaration, we cannot
12691 apply the pragma until after we have merged this declaration
12692 with any previous declarations; if the original declaration
12693 has a linkage specification, that specification applies to
12694 the definition as well, and may affect the mangled name. */
12695 if (DECL_FILE_SCOPE_P (decl1))
12696 maybe_apply_pragma_weak (decl1);
12699 /* Reset this in case the call to pushdecl changed it. */
12700 current_function_decl = decl1;
12702 gcc_assert (DECL_INITIAL (decl1));
12704 /* This function may already have been parsed, in which case just
12705 return; our caller will skip over the body without parsing. */
12706 if (DECL_INITIAL (decl1) != error_mark_node)
12709 /* Initialize RTL machinery. We cannot do this until
12710 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12711 even when processing a template; this is how we get
12712 CFUN set up, and our per-function variables initialized.
12713 FIXME factor out the non-RTL stuff. */
12714 bl = current_binding_level;
12715 allocate_struct_function (decl1, processing_template_decl);
12717 /* Initialize the language data structures. Whenever we start
12718 a new function, we destroy temporaries in the usual way. */
12719 cfun->language = ggc_alloc_cleared_language_function ();
12720 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12721 current_binding_level = bl;
12723 /* Start the statement-tree, start the tree now. */
12724 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12726 /* If we are (erroneously) defining a function that we have already
12727 defined before, wipe out what we knew before. */
12728 if (!DECL_PENDING_INLINE_P (decl1))
12729 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12731 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12733 /* We know that this was set up by `grokclassfn'. We do not
12734 wait until `store_parm_decls', since evil parse errors may
12735 never get us to that point. Here we keep the consistency
12736 between `current_class_type' and `current_class_ptr'. */
12737 tree t = DECL_ARGUMENTS (decl1);
12739 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12740 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12742 cp_function_chain->x_current_class_ref
12743 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12744 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12745 cp_function_chain->x_current_class_ptr = t;
12747 /* Constructors and destructors need to know whether they're "in
12748 charge" of initializing virtual base classes. */
12749 t = DECL_CHAIN (t);
12750 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12752 current_in_charge_parm = t;
12753 t = DECL_CHAIN (t);
12755 if (DECL_HAS_VTT_PARM_P (decl1))
12757 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12758 current_vtt_parm = t;
12762 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12763 /* Implicitly-defined methods (like the
12764 destructor for a class in which no destructor
12765 is explicitly declared) must not be defined
12766 until their definition is needed. So, we
12767 ignore interface specifications for
12768 compiler-generated functions. */
12769 && !DECL_ARTIFICIAL (decl1));
12771 if (processing_template_decl)
12772 /* Don't mess with interface flags. */;
12773 else if (DECL_INTERFACE_KNOWN (decl1))
12775 tree ctx = decl_function_context (decl1);
12777 if (DECL_NOT_REALLY_EXTERN (decl1))
12778 DECL_EXTERNAL (decl1) = 0;
12780 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12781 && TREE_PUBLIC (ctx))
12782 /* This is a function in a local class in an extern inline
12784 comdat_linkage (decl1);
12786 /* If this function belongs to an interface, it is public.
12787 If it belongs to someone else's interface, it is also external.
12788 This only affects inlines and template instantiations. */
12789 else if (!finfo->interface_unknown && honor_interface)
12791 if (DECL_DECLARED_INLINE_P (decl1)
12792 || DECL_TEMPLATE_INSTANTIATION (decl1))
12794 DECL_EXTERNAL (decl1)
12795 = (finfo->interface_only
12796 || (DECL_DECLARED_INLINE_P (decl1)
12797 && ! flag_implement_inlines
12798 && !DECL_VINDEX (decl1)));
12800 /* For WIN32 we also want to put these in linkonce sections. */
12801 maybe_make_one_only (decl1);
12804 DECL_EXTERNAL (decl1) = 0;
12805 DECL_INTERFACE_KNOWN (decl1) = 1;
12806 /* If this function is in an interface implemented in this file,
12807 make sure that the back end knows to emit this function
12809 if (!DECL_EXTERNAL (decl1))
12810 mark_needed (decl1);
12812 else if (finfo->interface_unknown && finfo->interface_only
12813 && honor_interface)
12815 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12816 interface, we will have both finfo->interface_unknown and
12817 finfo->interface_only set. In that case, we don't want to
12818 use the normal heuristics because someone will supply a
12819 #pragma implementation elsewhere, and deducing it here would
12820 produce a conflict. */
12821 comdat_linkage (decl1);
12822 DECL_EXTERNAL (decl1) = 0;
12823 DECL_INTERFACE_KNOWN (decl1) = 1;
12824 DECL_DEFER_OUTPUT (decl1) = 1;
12828 /* This is a definition, not a reference.
12829 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12830 if (!GNU_INLINE_P (decl1))
12831 DECL_EXTERNAL (decl1) = 0;
12833 if ((DECL_DECLARED_INLINE_P (decl1)
12834 || DECL_TEMPLATE_INSTANTIATION (decl1))
12835 && ! DECL_INTERFACE_KNOWN (decl1))
12836 DECL_DEFER_OUTPUT (decl1) = 1;
12838 DECL_INTERFACE_KNOWN (decl1) = 1;
12841 /* Determine the ELF visibility attribute for the function. We must not
12842 do this before calling "pushdecl", as we must allow "duplicate_decls"
12843 to merge any attributes appropriately. We also need to wait until
12845 if (!DECL_CLONED_FUNCTION_P (decl1))
12846 determine_visibility (decl1);
12848 begin_scope (sk_function_parms, decl1);
12852 if (DECL_DESTRUCTOR_P (decl1)
12853 || (DECL_CONSTRUCTOR_P (decl1)
12854 && targetm.cxx.cdtor_returns_this ()))
12856 cdtor_label = build_decl (input_location,
12857 LABEL_DECL, NULL_TREE, NULL_TREE);
12858 DECL_CONTEXT (cdtor_label) = current_function_decl;
12861 start_fname_decls ();
12863 store_parm_decls (current_function_parms);
12867 /* Like start_preparsed_function, except that instead of a
12868 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12870 Returns 1 on success. If the DECLARATOR is not suitable for a function
12871 (it defines a datum instead), we return 0, which tells
12872 yyparse to report a parse error. */
12875 start_function (cp_decl_specifier_seq *declspecs,
12876 const cp_declarator *declarator,
12881 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12882 if (decl1 == error_mark_node)
12884 /* If the declarator is not suitable for a function definition,
12885 cause a syntax error. */
12886 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12888 error ("invalid function declaration");
12892 if (DECL_MAIN_P (decl1))
12893 /* main must return int. grokfndecl should have corrected it
12894 (and issued a diagnostic) if the user got it wrong. */
12895 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12896 integer_type_node));
12898 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12903 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12907 use_eh_spec_block (tree fn)
12909 return (flag_exceptions && flag_enforce_eh_specs
12910 && !processing_template_decl
12911 && !type_throw_all_p (TREE_TYPE (fn))
12912 /* We insert the EH_SPEC_BLOCK only in the original
12913 function; then, it is copied automatically to the
12915 && !DECL_CLONED_FUNCTION_P (fn)
12916 /* Implicitly-generated constructors and destructors have
12917 exception specifications. However, those specifications
12918 are the union of the possible exceptions specified by the
12919 constructors/destructors for bases and members, so no
12920 unallowed exception will ever reach this function. By
12921 not creating the EH_SPEC_BLOCK we save a little memory,
12922 and we avoid spurious warnings about unreachable
12924 && !DECL_DEFAULTED_FN (fn));
12927 /* Store the parameter declarations into the current function declaration.
12928 This is called after parsing the parameter declarations, before
12929 digesting the body of the function.
12931 Also install to binding contour return value identifier, if any. */
12934 store_parm_decls (tree current_function_parms)
12936 tree fndecl = current_function_decl;
12939 /* This is a chain of any other decls that came in among the parm
12940 declarations. If a parm is declared with enum {foo, bar} x;
12941 then CONST_DECLs for foo and bar are put here. */
12942 tree nonparms = NULL_TREE;
12944 if (current_function_parms)
12946 /* This case is when the function was defined with an ANSI prototype.
12947 The parms already have decls, so we need not do anything here
12948 except record them as in effect
12949 and complain if any redundant old-style parm decls were written. */
12951 tree specparms = current_function_parms;
12954 /* Must clear this because it might contain TYPE_DECLs declared
12956 current_binding_level->names = NULL;
12958 /* If we're doing semantic analysis, then we'll call pushdecl
12959 for each of these. We must do them in reverse order so that
12960 they end in the correct forward order. */
12961 specparms = nreverse (specparms);
12963 for (parm = specparms; parm; parm = next)
12965 next = DECL_CHAIN (parm);
12966 if (TREE_CODE (parm) == PARM_DECL)
12968 if (DECL_NAME (parm) == NULL_TREE
12969 || TREE_CODE (parm) != VOID_TYPE)
12972 error ("parameter %qD declared void", parm);
12976 /* If we find an enum constant or a type tag,
12977 put it aside for the moment. */
12978 TREE_CHAIN (parm) = NULL_TREE;
12979 nonparms = chainon (nonparms, parm);
12983 /* Get the decls in their original chain order and record in the
12984 function. This is all and only the PARM_DECLs that were
12985 pushed into scope by the loop above. */
12986 DECL_ARGUMENTS (fndecl) = getdecls ();
12989 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12991 /* Now store the final chain of decls for the arguments
12992 as the decl-chain of the current lexical scope.
12993 Put the enumerators in as well, at the front so that
12994 DECL_ARGUMENTS is not modified. */
12995 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12997 if (use_eh_spec_block (current_function_decl))
12998 current_eh_spec_block = begin_eh_spec_block ();
13002 /* We have finished doing semantic analysis on DECL, but have not yet
13003 generated RTL for its body. Save away our current state, so that
13004 when we want to generate RTL later we know what to do. */
13007 save_function_data (tree decl)
13009 struct language_function *f;
13011 /* Save the language-specific per-function data so that we can
13012 get it back when we really expand this function. */
13013 gcc_assert (!DECL_PENDING_INLINE_P (decl));
13016 f = ggc_alloc_language_function ();
13017 memcpy (f, cp_function_chain, sizeof (struct language_function));
13018 DECL_SAVED_FUNCTION_DATA (decl) = f;
13020 /* Clear out the bits we don't need. */
13021 f->base.x_stmt_tree.x_cur_stmt_list = NULL;
13022 f->bindings = NULL;
13023 f->x_local_names = NULL;
13024 f->base.local_typedefs = NULL;
13028 /* Set the return value of the constructor (if present). */
13031 finish_constructor_body (void)
13036 if (targetm.cxx.cdtor_returns_this ()
13037 && (! TYPE_FOR_JAVA (current_class_type)))
13039 /* Any return from a constructor will end up here. */
13040 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
13042 val = DECL_ARGUMENTS (current_function_decl);
13043 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
13044 DECL_RESULT (current_function_decl), val);
13045 /* Return the address of the object. */
13046 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
13047 add_stmt (exprstmt);
13051 /* Do all the processing for the beginning of a destructor; set up the
13052 vtable pointers and cleanups for bases and members. */
13055 begin_destructor_body (void)
13057 tree compound_stmt;
13059 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13060 issued an error message. We still want to try to process the
13061 body of the function, but initialize_vtbl_ptrs will crash if
13062 TYPE_BINFO is NULL. */
13063 if (COMPLETE_TYPE_P (current_class_type))
13065 compound_stmt = begin_compound_stmt (0);
13066 /* Make all virtual function table pointers in non-virtual base
13067 classes point to CURRENT_CLASS_TYPE's virtual function
13069 initialize_vtbl_ptrs (current_class_ptr);
13070 finish_compound_stmt (compound_stmt);
13072 /* And insert cleanups for our bases and members so that they
13073 will be properly destroyed if we throw. */
13074 push_base_cleanups ();
13078 /* At the end of every destructor we generate code to delete the object if
13079 necessary. Do that now. */
13082 finish_destructor_body (void)
13086 /* Any return from a destructor will end up here; that way all base
13087 and member cleanups will be run when the function returns. */
13088 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
13090 /* In a virtual destructor, we must call delete. */
13091 if (DECL_VIRTUAL_P (current_function_decl))
13094 tree virtual_size = cxx_sizeof (current_class_type);
13098 At the point of definition of a virtual destructor (including
13099 an implicit definition), non-placement operator delete shall
13100 be looked up in the scope of the destructor's class and if
13101 found shall be accessible and unambiguous. */
13102 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
13104 /*global_p=*/false,
13105 /*placement=*/NULL_TREE,
13106 /*alloc_fn=*/NULL_TREE);
13108 if_stmt = begin_if_stmt ();
13109 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
13110 current_in_charge_parm,
13113 finish_expr_stmt (exprstmt);
13114 finish_then_clause (if_stmt);
13115 finish_if_stmt (if_stmt);
13118 if (targetm.cxx.cdtor_returns_this ())
13122 val = DECL_ARGUMENTS (current_function_decl);
13123 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
13124 DECL_RESULT (current_function_decl), val);
13125 /* Return the address of the object. */
13126 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
13127 add_stmt (exprstmt);
13131 /* Do the necessary processing for the beginning of a function body, which
13132 in this case includes member-initializers, but not the catch clauses of
13133 a function-try-block. Currently, this means opening a binding level
13134 for the member-initializers (in a ctor), member cleanups (in a dtor),
13135 and capture proxies (in a lambda operator()). */
13138 begin_function_body (void)
13142 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13145 if (processing_template_decl)
13146 /* Do nothing now. */;
13148 /* Always keep the BLOCK node associated with the outermost pair of
13149 curly braces of a function. These are needed for correct
13150 operation of dwarfout.c. */
13151 keep_next_level (true);
13153 stmt = begin_compound_stmt (BCS_FN_BODY);
13155 if (processing_template_decl)
13156 /* Do nothing now. */;
13157 else if (DECL_DESTRUCTOR_P (current_function_decl))
13158 begin_destructor_body ();
13163 /* Do the processing for the end of a function body. Currently, this means
13164 closing out the cleanups for fully-constructed bases and members, and in
13165 the case of the destructor, deleting the object if desired. Again, this
13166 is only meaningful for [cd]tors, since they are the only functions where
13167 there is a significant distinction between the main body and any
13168 function catch clauses. Handling, say, main() return semantics here
13169 would be wrong, as flowing off the end of a function catch clause for
13170 main() would also need to return 0. */
13173 finish_function_body (tree compstmt)
13175 if (compstmt == NULL_TREE)
13178 /* Close the block. */
13179 finish_compound_stmt (compstmt);
13181 if (processing_template_decl)
13182 /* Do nothing now. */;
13183 else if (DECL_CONSTRUCTOR_P (current_function_decl))
13184 finish_constructor_body ();
13185 else if (DECL_DESTRUCTOR_P (current_function_decl))
13186 finish_destructor_body ();
13189 /* Given a function, returns the BLOCK corresponding to the outermost level
13190 of curly braces, skipping the artificial block created for constructor
13194 outer_curly_brace_block (tree fndecl)
13196 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
13197 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13198 /* Skip the artificial function body block. */
13199 block = BLOCK_SUBBLOCKS (block);
13203 /* If FNDECL is a class's key method, add the class to the list of
13204 keyed classes that should be emitted. */
13207 record_key_method_defined (tree fndecl)
13209 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
13210 && DECL_VIRTUAL_P (fndecl)
13211 && !processing_template_decl)
13213 tree fnclass = DECL_CONTEXT (fndecl);
13214 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
13215 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
13219 /* Subroutine of finish_function.
13220 Save the body of constexpr functions for possible
13221 future compile time evaluation. */
13224 maybe_save_function_definition (tree fun)
13226 if (!processing_template_decl
13227 && DECL_DECLARED_CONSTEXPR_P (fun)
13228 && !DECL_CLONED_FUNCTION_P (fun))
13229 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13232 /* Finish up a function declaration and compile that function
13233 all the way to assembler language output. The free the storage
13234 for the function definition.
13236 FLAGS is a bitwise or of the following values:
13238 We just finished processing the body of an in-class inline
13239 function definition. (This processing will have taken place
13240 after the class definition is complete.) */
13243 finish_function (int flags)
13245 tree fndecl = current_function_decl;
13246 tree fntype, ctype = NULL_TREE;
13247 int inclass_inline = (flags & 2) != 0;
13249 /* When we get some parse errors, we can end up without a
13250 current_function_decl, so cope. */
13251 if (fndecl == NULL_TREE)
13252 return error_mark_node;
13254 if (c_dialect_objc ())
13255 objc_finish_function ();
13257 gcc_assert (!defer_mark_used_calls);
13258 defer_mark_used_calls = true;
13260 record_key_method_defined (fndecl);
13262 fntype = TREE_TYPE (fndecl);
13264 /* TREE_READONLY (fndecl) = 1;
13265 This caused &foo to be of type ptr-to-const-function
13266 which then got a warning when stored in a ptr-to-function variable. */
13268 gcc_assert (building_stmt_list_p ());
13269 /* The current function is being defined, so its DECL_INITIAL should
13270 be set, and unless there's a multiple definition, it should be
13271 error_mark_node. */
13272 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13274 /* For a cloned function, we've already got all the code we need;
13275 there's no need to add any extra bits. */
13276 if (!DECL_CLONED_FUNCTION_P (fndecl))
13278 if (DECL_MAIN_P (current_function_decl))
13280 /* Make it so that `main' always returns 0 by default (or
13283 finish_return_stmt (integer_one_node);
13285 finish_return_stmt (integer_zero_node);
13289 if (use_eh_spec_block (current_function_decl))
13290 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13291 (TREE_TYPE (current_function_decl)),
13292 current_eh_spec_block);
13295 /* If we're saving up tree structure, tie off the function now. */
13296 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13298 finish_fname_decls ();
13300 /* If this function can't throw any exceptions, remember that. */
13301 if (!processing_template_decl
13302 && !cp_function_chain->can_throw
13303 && !flag_non_call_exceptions
13304 && !decl_replaceable_p (fndecl))
13305 TREE_NOTHROW (fndecl) = 1;
13307 /* This must come after expand_function_end because cleanups might
13308 have declarations (from inline functions) that need to go into
13309 this function's blocks. */
13311 /* If the current binding level isn't the outermost binding level
13312 for this function, either there is a bug, or we have experienced
13313 syntax errors and the statement tree is malformed. */
13314 if (current_binding_level->kind != sk_function_parms)
13316 /* Make sure we have already experienced errors. */
13317 gcc_assert (errorcount);
13319 /* Throw away the broken statement tree and extra binding
13321 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13323 while (current_binding_level->kind != sk_function_parms)
13325 if (current_binding_level->kind == sk_class)
13326 pop_nested_class ();
13328 poplevel (0, 0, 0);
13331 poplevel (1, 0, 1);
13333 /* Statements should always be full-expressions at the outermost set
13334 of curly braces for a function. */
13335 gcc_assert (stmts_are_full_exprs_p ());
13337 /* Save constexpr function body before it gets munged by
13338 the NRV transformation. */
13339 maybe_save_function_definition (fndecl);
13341 /* Set up the named return value optimization, if we can. Candidate
13342 variables are selected in check_return_expr. */
13343 if (current_function_return_value)
13345 tree r = current_function_return_value;
13348 if (r != error_mark_node
13349 /* This is only worth doing for fns that return in memory--and
13350 simpler, since we don't have to worry about promoted modes. */
13351 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13352 /* Only allow this for variables declared in the outer scope of
13353 the function so we know that their lifetime always ends with a
13354 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13355 we were to do this optimization in tree-ssa. */
13356 && (outer = outer_curly_brace_block (fndecl))
13357 && chain_member (r, BLOCK_VARS (outer)))
13358 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13360 current_function_return_value = NULL_TREE;
13363 /* Remember that we were in class scope. */
13364 if (current_class_name)
13365 ctype = current_class_type;
13367 /* Must mark the RESULT_DECL as being in this function. */
13368 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13370 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13371 to the FUNCTION_DECL node itself. */
13372 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13374 /* Save away current state, if appropriate. */
13375 if (!processing_template_decl)
13376 save_function_data (fndecl);
13378 /* Complain if there's just no return statement. */
13379 if (warn_return_type
13380 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13381 && !dependent_type_p (TREE_TYPE (fntype))
13382 && !current_function_returns_value && !current_function_returns_null
13383 /* Don't complain if we abort or throw. */
13384 && !current_function_returns_abnormally
13385 /* Don't complain if we are declared noreturn. */
13386 && !TREE_THIS_VOLATILE (fndecl)
13387 && !DECL_NAME (DECL_RESULT (fndecl))
13388 && !TREE_NO_WARNING (fndecl)
13389 /* Structor return values (if any) are set by the compiler. */
13390 && !DECL_CONSTRUCTOR_P (fndecl)
13391 && !DECL_DESTRUCTOR_P (fndecl))
13393 warning (OPT_Wreturn_type,
13394 "no return statement in function returning non-void");
13395 TREE_NO_WARNING (fndecl) = 1;
13398 /* Store the end of the function, so that we get good line number
13399 info for the epilogue. */
13400 cfun->function_end_locus = input_location;
13402 /* Complain about parameters that are only set, but never otherwise used. */
13403 if (warn_unused_but_set_parameter
13404 && !processing_template_decl
13405 && errorcount == unused_but_set_errorcount
13406 && !DECL_CLONED_FUNCTION_P (fndecl))
13410 for (decl = DECL_ARGUMENTS (fndecl);
13412 decl = DECL_CHAIN (decl))
13413 if (TREE_USED (decl)
13414 && TREE_CODE (decl) == PARM_DECL
13415 && !DECL_READ_P (decl)
13416 && DECL_NAME (decl)
13417 && !DECL_ARTIFICIAL (decl)
13418 && !TREE_NO_WARNING (decl)
13419 && !DECL_IN_SYSTEM_HEADER (decl)
13420 && TREE_TYPE (decl) != error_mark_node
13421 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13422 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13423 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13424 warning (OPT_Wunused_but_set_parameter,
13425 "parameter %q+D set but not used", decl);
13426 unused_but_set_errorcount = errorcount;
13429 /* Complain about locally defined typedefs that are not used in this
13431 maybe_warn_unused_local_typedefs ();
13433 /* Genericize before inlining. */
13434 if (!processing_template_decl)
13436 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13437 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13438 cp_genericize (fndecl);
13439 /* Clear out the bits we don't need. */
13440 f->x_current_class_ptr = NULL;
13441 f->x_current_class_ref = NULL;
13442 f->x_eh_spec_block = NULL;
13443 f->x_in_charge_parm = NULL;
13444 f->x_vtt_parm = NULL;
13445 f->x_return_value = NULL;
13446 f->bindings = NULL;
13447 f->extern_decl_map = NULL;
13449 /* Clear out the bits we don't need. */
13450 local_names = NULL;
13452 /* We're leaving the context of this function, so zap cfun. It's still in
13453 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13455 current_function_decl = NULL;
13457 /* If this is an in-class inline definition, we may have to pop the
13458 bindings for the template parameters that we added in
13459 maybe_begin_member_template_processing when start_function was
13461 if (inclass_inline)
13462 maybe_end_member_template_processing ();
13464 /* Leave the scope of the class. */
13466 pop_nested_class ();
13471 current_function_decl = NULL_TREE;
13473 defer_mark_used_calls = false;
13474 if (deferred_mark_used_calls)
13479 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13481 VEC_free (tree, gc, deferred_mark_used_calls);
13487 /* Create the FUNCTION_DECL for a function definition.
13488 DECLSPECS and DECLARATOR are the parts of the declaration;
13489 they describe the return type and the name of the function,
13490 but twisted together in a fashion that parallels the syntax of C.
13492 This function creates a binding context for the function body
13493 as well as setting up the FUNCTION_DECL in current_function_decl.
13495 Returns a FUNCTION_DECL on success.
13497 If the DECLARATOR is not suitable for a function (it defines a datum
13498 instead), we return 0, which tells yyparse to report a parse error.
13500 May return void_type_node indicating that this method is actually
13501 a friend. See grokfield for more details.
13503 Came here with a `.pushlevel' .
13505 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13506 CHANGES TO CODE IN `grokfield'. */
13509 grokmethod (cp_decl_specifier_seq *declspecs,
13510 const cp_declarator *declarator, tree attrlist)
13512 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13515 if (fndecl == error_mark_node)
13516 return error_mark_node;
13518 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13520 error ("invalid member function declaration");
13521 return error_mark_node;
13525 cplus_decl_attributes (&fndecl, attrlist, 0);
13527 /* Pass friends other than inline friend functions back. */
13528 if (fndecl == void_type_node)
13531 if (DECL_IN_AGGR_P (fndecl))
13533 if (DECL_CLASS_SCOPE_P (fndecl))
13534 error ("%qD is already defined in class %qT", fndecl,
13535 DECL_CONTEXT (fndecl));
13536 return error_mark_node;
13539 check_template_shadow (fndecl);
13541 DECL_DECLARED_INLINE_P (fndecl) = 1;
13542 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13544 /* We process method specializations in finish_struct_1. */
13545 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13547 fndecl = push_template_decl (fndecl);
13548 if (fndecl == error_mark_node)
13552 if (! DECL_FRIEND_P (fndecl))
13554 if (DECL_CHAIN (fndecl))
13556 fndecl = copy_node (fndecl);
13557 TREE_CHAIN (fndecl) = NULL_TREE;
13561 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13563 DECL_IN_AGGR_P (fndecl) = 1;
13568 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13569 we can lay it out later, when and if its type becomes complete. */
13572 maybe_register_incomplete_var (tree var)
13574 gcc_assert (TREE_CODE (var) == VAR_DECL);
13576 /* Keep track of variables with incomplete types. */
13577 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13578 && DECL_EXTERNAL (var))
13580 tree inner_type = TREE_TYPE (var);
13582 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13583 inner_type = TREE_TYPE (inner_type);
13584 inner_type = TYPE_MAIN_VARIANT (inner_type);
13586 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13587 /* RTTI TD entries are created while defining the type_info. */
13588 || (TYPE_LANG_SPECIFIC (inner_type)
13589 && TYPE_BEING_DEFINED (inner_type)))
13592 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13594 iv->incomplete_type = inner_type;
13599 /* Called when a class type (given by TYPE) is defined. If there are
13600 any existing VAR_DECLs whose type has been completed by this
13601 declaration, update them now. */
13604 complete_vars (tree type)
13607 incomplete_var *iv;
13609 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13611 if (same_type_p (type, iv->incomplete_type))
13613 tree var = iv->decl;
13614 tree type = TREE_TYPE (var);
13615 /* Complete the type of the variable. The VAR_DECL itself
13616 will be laid out in expand_expr. */
13617 complete_type (type);
13618 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13619 /* Remove this entry from the list. */
13620 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13626 /* Check for pending declarations which may have abstract type. */
13627 complete_type_check_abstract (type);
13630 /* If DECL is of a type which needs a cleanup, build and return an
13631 expression to perform that cleanup here. Return NULL_TREE if no
13632 cleanup need be done. */
13635 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13641 /* Assume no cleanup is required. */
13642 cleanup = NULL_TREE;
13644 if (error_operand_p (decl))
13647 /* Handle "__attribute__((cleanup))". We run the cleanup function
13648 before the destructor since the destructor is what actually
13649 terminates the lifetime of the object. */
13650 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13657 /* Get the name specified by the user for the cleanup function. */
13658 id = TREE_VALUE (TREE_VALUE (attr));
13659 /* Look up the name to find the cleanup function to call. It is
13660 important to use lookup_name here because that is what is
13661 used in c-common.c:handle_cleanup_attribute when performing
13662 initial checks on the attribute. Note that those checks
13663 include ensuring that the function found is not an overloaded
13664 function, or an object with an overloaded call operator,
13665 etc.; we can rely on the fact that the function found is an
13666 ordinary FUNCTION_DECL. */
13667 fn = lookup_name (id);
13668 arg = build_address (decl);
13670 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13671 if (cleanup == error_mark_node)
13672 return error_mark_node;
13674 /* Handle ordinary C++ destructors. */
13675 type = TREE_TYPE (decl);
13676 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13678 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13679 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13680 && CLASSTYPE_VBASECLASSES (type));
13684 if (TREE_CODE (type) == ARRAY_TYPE)
13687 addr = build_address (decl);
13689 /* Optimize for space over speed here. */
13690 if (!has_vbases || flag_expensive_optimizations)
13691 flags |= LOOKUP_NONVIRTUAL;
13693 call = build_delete (TREE_TYPE (addr), addr,
13694 sfk_complete_destructor, flags, 0, complain);
13695 if (call == error_mark_node)
13696 cleanup = error_mark_node;
13698 cleanup = cp_build_compound_expr (cleanup, call, complain);
13706 /* When a stmt has been parsed, this function is called. */
13713 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13714 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13715 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13718 static_fn_type (tree memfntype)
13723 if (TYPE_PTRMEMFUNC_P (memfntype))
13724 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13725 if (POINTER_TYPE_P (memfntype)
13726 || TREE_CODE (memfntype) == FUNCTION_DECL)
13727 memfntype = TREE_TYPE (memfntype);
13728 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13730 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13731 args = TYPE_ARG_TYPES (memfntype);
13732 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13733 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13734 fntype = (cp_build_type_attribute_variant
13735 (fntype, TYPE_ATTRIBUTES (memfntype)));
13736 fntype = (build_exception_variant
13737 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13741 /* DECL was originally constructed as a non-static member function,
13742 but turned out to be static. Update it accordingly. */
13745 revert_static_member_fn (tree decl)
13747 tree stype = static_fn_type (decl);
13748 cp_cv_quals quals = type_memfn_quals (stype);
13750 if (quals != TYPE_UNQUALIFIED)
13751 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13753 TREE_TYPE (decl) = stype;
13755 if (DECL_ARGUMENTS (decl))
13756 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13757 DECL_STATIC_FUNCTION_P (decl) = 1;
13760 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13761 one of the language-independent trees. */
13763 enum cp_tree_node_structure_enum
13764 cp_tree_node_structure (union lang_tree_node * t)
13766 switch (TREE_CODE (&t->generic))
13768 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13769 case DEFERRED_NOEXCEPT: return TS_CP_DEFERRED_NOEXCEPT;
13770 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13771 case OVERLOAD: return TS_CP_OVERLOAD;
13772 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13773 case PTRMEM_CST: return TS_CP_PTRMEM;
13774 case BASELINK: return TS_CP_BASELINK;
13775 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13776 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13777 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13778 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13779 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13780 case USERDEF_LITERAL: return TS_CP_USERDEF_LITERAL;
13781 default: return TS_CP_GENERIC;
13785 /* Build the void_list_node (void_type_node having been created). */
13787 build_void_list_node (void)
13789 tree t = build_tree_list (NULL_TREE, void_type_node);
13794 cp_missing_noreturn_ok_p (tree decl)
13796 /* A missing noreturn is ok for the `main' function. */
13797 return DECL_MAIN_P (decl);
13800 /* Return the COMDAT group into which DECL should be placed. */
13803 cxx_comdat_group (tree decl)
13807 /* Virtual tables, construction virtual tables, and virtual table
13808 tables all go in a single COMDAT group, named after the primary
13810 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13811 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13812 /* For all other DECLs, the COMDAT group is the mangled name of the
13813 declaration itself. */
13816 while (DECL_THUNK_P (decl))
13818 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13819 into the same section as the target function. In that case
13820 we must return target's name. */
13821 tree target = THUNK_TARGET (decl);
13822 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13823 && DECL_SECTION_NAME (target) != NULL
13824 && DECL_ONE_ONLY (target))
13829 name = DECL_ASSEMBLER_NAME (decl);
13835 #include "gt-cp-decl.h"