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, tree *);
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, tree *);
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
648 tree name = DECL_NAME (link);
652 ob = outer_binding (name,
653 IDENTIFIER_BINDING (name),
656 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
658 ns_binding = NULL_TREE;
660 if (ob && ob->scope == current_binding_level->level_chain)
661 /* We have something like:
666 and we are leaving the `for' scope. There's no reason to
667 keep the binding of the inner `i' in this case. */
668 pop_binding (name, link);
669 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
670 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
671 /* Here, we have something like:
679 We must pop the for-scope binding so we know what's a
680 type and what isn't. */
681 pop_binding (name, link);
684 /* Mark this VAR_DECL as dead so that we can tell we left it
685 there only for backward compatibility. */
686 DECL_DEAD_FOR_LOCAL (link) = 1;
688 /* Keep track of what should have happened when we
689 popped the binding. */
692 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
693 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
696 /* Add it to the list of dead variables in the next
697 outermost binding to that we can remove these when we
698 leave that binding. */
699 VEC_safe_push (tree, gc,
700 current_binding_level->level_chain->dead_vars_from_for,
703 /* Although we don't pop the cxx_binding, we do clear
704 its SCOPE since the scope is going away now. */
705 IDENTIFIER_BINDING (name)->scope
706 = current_binding_level->level_chain;
713 /* Remove the binding. */
716 if (TREE_CODE (decl) == TREE_LIST)
717 decl = TREE_VALUE (decl);
720 if (TREE_CODE (name) == OVERLOAD)
721 name = OVL_FUNCTION (name);
723 gcc_assert (DECL_P (name));
724 pop_binding (DECL_NAME (name), decl);
728 /* Remove declarations for any `for' variables from inner scopes
729 that we kept around. */
730 FOR_EACH_VEC_ELT_REVERSE (tree, current_binding_level->dead_vars_from_for,
732 pop_binding (DECL_NAME (decl), decl);
734 /* Restore the IDENTIFIER_TYPE_VALUEs. */
735 for (link = current_binding_level->type_shadowed;
736 link; link = TREE_CHAIN (link))
737 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
739 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
740 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding,
741 current_binding_level->shadowed_labels,
743 pop_local_label (label_bind->label, label_bind->prev_value);
745 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
746 list if a `using' declaration put them there. The debugging
747 back ends won't understand OVERLOAD, so we remove them here.
748 Because the BLOCK_VARS are (temporarily) shared with
749 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
750 popped all the bindings. */
755 for (d = &BLOCK_VARS (block); *d; )
757 if (TREE_CODE (*d) == TREE_LIST)
758 *d = TREE_CHAIN (*d);
760 d = &DECL_CHAIN (*d);
764 /* If the level being exited is the top level of a function,
765 check over all the labels. */
768 /* Since this is the top level block of a function, the vars are
769 the function's parameters. Don't leave them in the BLOCK
770 because they are found in the FUNCTION_DECL instead. */
771 BLOCK_VARS (block) = 0;
775 kind = current_binding_level->kind;
776 if (kind == sk_cleanup)
780 /* If this is a temporary binding created for a cleanup, then we'll
781 have pushed a statement list level. Pop that, create a new
782 BIND_EXPR for the block, and insert it into the stream. */
783 stmt = pop_stmt_list (current_binding_level->statement_list);
784 stmt = c_build_bind_expr (input_location, block, stmt);
791 /* The current function is being defined, so its DECL_INITIAL
792 should be error_mark_node. */
793 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
794 DECL_INITIAL (current_function_decl) = block;
797 current_binding_level->blocks
798 = block_chainon (current_binding_level->blocks, block);
800 /* If we did not make a block for the level just exited,
801 any blocks made for inner levels
802 (since they cannot be recorded as subblocks in that level)
803 must be carried forward so they will later become subblocks
804 of something else. */
806 current_binding_level->blocks
807 = block_chainon (current_binding_level->blocks, subblocks);
809 /* Each and every BLOCK node created here in `poplevel' is important
810 (e.g. for proper debugging information) so if we created one
811 earlier, mark it as "used". */
813 TREE_USED (block) = 1;
815 /* All temporary bindings created for cleanups are popped silently. */
816 if (kind == sk_cleanup)
819 timevar_stop (TV_NAME_LOOKUP);
823 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
824 itself, calling F for each. The DATA is passed to F as well. */
827 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
830 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
832 result |= (*f) (name_space, data);
834 for (; current; current = DECL_CHAIN (current))
835 result |= walk_namespaces_r (current, f, data);
840 /* Walk all the namespaces, calling F for each. The DATA is passed to
844 walk_namespaces (walk_namespaces_fn f, void* data)
846 return walk_namespaces_r (global_namespace, f, data);
849 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
850 DATA is non-NULL, this is the last time we will call
851 wrapup_global_declarations for this NAMESPACE. */
854 wrapup_globals_for_namespace (tree name_space, void* data)
856 cp_binding_level *level = NAMESPACE_LEVEL (name_space);
857 VEC(tree,gc) *statics = level->static_decls;
858 tree *vec = VEC_address (tree, statics);
859 int len = VEC_length (tree, statics);
860 int last_time = (data != 0);
864 check_global_declarations (vec, len);
865 emit_debug_global_declarations (vec, len);
869 /* Write out any globals that need to be output. */
870 return wrapup_global_declarations (vec, len);
874 /* In C++, you don't have to write `struct S' to refer to `S'; you
875 can just use `S'. We accomplish this by creating a TYPE_DECL as
876 if the user had written `typedef struct S S'. Create and return
877 the TYPE_DECL for TYPE. */
880 create_implicit_typedef (tree name, tree type)
884 decl = build_decl (input_location, TYPE_DECL, name, type);
885 DECL_ARTIFICIAL (decl) = 1;
886 /* There are other implicit type declarations, like the one *within*
887 a class that allows you to write `S::S'. We must distinguish
889 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
890 TYPE_NAME (type) = decl;
891 TYPE_STUB_DECL (type) = decl;
896 /* Remember a local name for name-mangling purposes. */
899 push_local_name (tree decl)
904 timevar_start (TV_NAME_LOOKUP);
906 name = DECL_NAME (decl);
908 nelts = VEC_length (tree, local_names);
909 for (i = 0; i < nelts; i++)
911 t = VEC_index (tree, local_names, i);
912 if (DECL_NAME (t) == name)
914 if (!DECL_LANG_SPECIFIC (decl))
915 retrofit_lang_decl (decl);
916 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
917 if (DECL_LANG_SPECIFIC (t))
918 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
920 DECL_DISCRIMINATOR (decl) = 1;
922 VEC_replace (tree, local_names, i, decl);
923 timevar_stop (TV_NAME_LOOKUP);
928 VEC_safe_push (tree, gc, local_names, decl);
929 timevar_stop (TV_NAME_LOOKUP);
932 /* Subroutine of duplicate_decls: return truthvalue of whether
933 or not types of these decls match.
935 For C++, we must compare the parameter list so that `int' can match
936 `int&' in a parameter position, but `int&' is not confused with
940 decls_match (tree newdecl, tree olddecl)
944 if (newdecl == olddecl)
947 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
948 /* If the two DECLs are not even the same kind of thing, we're not
949 interested in their types. */
952 if (TREE_CODE (newdecl) == FUNCTION_DECL)
954 tree f1 = TREE_TYPE (newdecl);
955 tree f2 = TREE_TYPE (olddecl);
956 tree p1 = TYPE_ARG_TYPES (f1);
957 tree p2 = TYPE_ARG_TYPES (f2);
959 /* Specializations of different templates are different functions
960 even if they have the same type. */
961 tree t1 = (DECL_USE_TEMPLATE (newdecl)
962 ? DECL_TI_TEMPLATE (newdecl)
964 tree t2 = (DECL_USE_TEMPLATE (olddecl)
965 ? DECL_TI_TEMPLATE (olddecl)
970 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
971 && ! (DECL_EXTERN_C_P (newdecl)
972 && DECL_EXTERN_C_P (olddecl)))
975 #ifdef NO_IMPLICIT_EXTERN_C
976 /* A new declaration doesn't match a built-in one unless it
977 is also extern "C". */
978 if (DECL_IS_BUILTIN (olddecl)
979 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
983 if (TREE_CODE (f1) != TREE_CODE (f2))
986 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
988 if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
989 && (DECL_BUILT_IN (olddecl)
990 #ifndef NO_IMPLICIT_EXTERN_C
991 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
992 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
996 types_match = self_promoting_args_p (p1);
997 if (p1 == void_list_node)
998 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1000 #ifndef NO_IMPLICIT_EXTERN_C
1001 else if (!prototype_p (f1)
1002 && (DECL_EXTERN_C_P (olddecl)
1003 && DECL_IN_SYSTEM_HEADER (olddecl)
1004 && !DECL_CLASS_SCOPE_P (olddecl))
1005 && (DECL_EXTERN_C_P (newdecl)
1006 && DECL_IN_SYSTEM_HEADER (newdecl)
1007 && !DECL_CLASS_SCOPE_P (newdecl)))
1009 types_match = self_promoting_args_p (p2);
1010 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1016 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1017 || comp_type_attributes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl)) != 0);
1023 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1025 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1026 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1029 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1030 DECL_TEMPLATE_PARMS (olddecl)))
1033 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1034 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1035 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1037 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1038 DECL_TEMPLATE_RESULT (newdecl));
1042 /* Need to check scope for variable declaration (VAR_DECL).
1043 For typedef (TYPE_DECL), scope is ignored. */
1044 if (TREE_CODE (newdecl) == VAR_DECL
1045 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1047 Two declarations for an object with C language linkage
1048 with the same name (ignoring the namespace that qualify
1049 it) that appear in different namespace scopes refer to
1051 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1054 if (TREE_TYPE (newdecl) == error_mark_node)
1055 types_match = TREE_TYPE (olddecl) == error_mark_node;
1056 else if (TREE_TYPE (olddecl) == NULL_TREE)
1057 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1058 else if (TREE_TYPE (newdecl) == NULL_TREE)
1061 types_match = comptypes (TREE_TYPE (newdecl),
1062 TREE_TYPE (olddecl),
1063 COMPARE_REDECLARATION);
1069 /* If NEWDECL is `static' and an `extern' was seen previously,
1070 warn about it. OLDDECL is the previous declaration.
1072 Note that this does not apply to the C++ case of declaring
1073 a variable `extern const' and then later `const'.
1075 Don't complain about built-in functions, since they are beyond
1076 the user's control. */
1079 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1081 if (TREE_CODE (newdecl) == TYPE_DECL
1082 || TREE_CODE (newdecl) == TEMPLATE_DECL
1083 || TREE_CODE (newdecl) == CONST_DECL
1084 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1087 /* Don't get confused by static member functions; that's a different
1089 if (TREE_CODE (newdecl) == FUNCTION_DECL
1090 && DECL_STATIC_FUNCTION_P (newdecl))
1093 /* If the old declaration was `static', or the new one isn't, then
1094 everything is OK. */
1095 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1098 /* It's OK to declare a builtin function as `static'. */
1099 if (TREE_CODE (olddecl) == FUNCTION_DECL
1100 && DECL_ARTIFICIAL (olddecl))
1103 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1104 permerror (input_location, "previous declaration of %q+D", olddecl);
1107 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1108 function templates. If their exception specifications do not
1109 match, issue a diagnostic. */
1112 check_redeclaration_exception_specification (tree new_decl,
1117 tree new_exceptions;
1118 tree old_exceptions;
1120 new_type = TREE_TYPE (new_decl);
1121 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1122 old_type = TREE_TYPE (old_decl);
1123 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1127 If any declaration of a function has an exception-specification,
1128 all declarations, including the definition and an explicit
1129 specialization, of that function shall have an
1130 exception-specification with the same set of type-ids. */
1131 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1132 && ! DECL_IS_BUILTIN (old_decl)
1134 && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1136 error ("declaration of %qF has a different exception specifier",
1138 error ("from previous declaration %q+F", old_decl);
1142 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1143 Otherwise issue diagnostics. */
1146 validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1148 old_decl = STRIP_TEMPLATE (old_decl);
1149 new_decl = STRIP_TEMPLATE (new_decl);
1150 if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1151 || !VAR_OR_FUNCTION_DECL_P (new_decl))
1153 if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1154 == DECL_DECLARED_CONSTEXPR_P (new_decl))
1156 if (TREE_CODE (old_decl) == FUNCTION_DECL && DECL_BUILT_IN (old_decl))
1158 /* Hide a built-in declaration. */
1159 DECL_DECLARED_CONSTEXPR_P (old_decl)
1160 = DECL_DECLARED_CONSTEXPR_P (new_decl);
1163 error ("redeclaration %qD differs in %<constexpr%>", new_decl);
1164 error ("from previous declaration %q+D", old_decl);
1168 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1169 && lookup_attribute ("gnu_inline", \
1170 DECL_ATTRIBUTES (fn)))
1172 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1173 If the redeclaration is invalid, a diagnostic is issued, and the
1174 error_mark_node is returned. Otherwise, OLDDECL is returned.
1176 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1179 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1182 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1184 unsigned olddecl_uid = DECL_UID (olddecl);
1185 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1186 int new_defines_function = 0;
1187 tree new_template_info;
1189 if (newdecl == olddecl)
1192 types_match = decls_match (newdecl, olddecl);
1194 /* If either the type of the new decl or the type of the old decl is an
1195 error_mark_node, then that implies that we have already issued an
1196 error (earlier) for some bogus type specification, and in that case,
1197 it is rather pointless to harass the user with yet more error message
1198 about the same declaration, so just pretend the types match here. */
1199 if (TREE_TYPE (newdecl) == error_mark_node
1200 || TREE_TYPE (olddecl) == error_mark_node)
1201 return error_mark_node;
1203 if (DECL_P (olddecl)
1204 && TREE_CODE (newdecl) == FUNCTION_DECL
1205 && TREE_CODE (olddecl) == FUNCTION_DECL
1206 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1208 if (DECL_DECLARED_INLINE_P (newdecl)
1209 && DECL_UNINLINABLE (newdecl)
1210 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1211 /* Already warned elsewhere. */;
1212 else if (DECL_DECLARED_INLINE_P (olddecl)
1213 && DECL_UNINLINABLE (olddecl)
1214 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1215 /* Already warned. */;
1216 else if (DECL_DECLARED_INLINE_P (newdecl)
1217 && DECL_UNINLINABLE (olddecl)
1218 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1220 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1222 warning (OPT_Wattributes, "previous declaration of %q+D "
1223 "with attribute noinline", olddecl);
1225 else if (DECL_DECLARED_INLINE_P (olddecl)
1226 && DECL_UNINLINABLE (newdecl)
1227 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1229 warning (OPT_Wattributes, "function %q+D redeclared with "
1230 "attribute noinline", newdecl);
1231 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1236 /* Check for redeclaration and other discrepancies. */
1237 if (TREE_CODE (olddecl) == FUNCTION_DECL
1238 && DECL_ARTIFICIAL (olddecl))
1240 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1241 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1243 /* Avoid warnings redeclaring built-ins which have not been
1244 explicitly declared. */
1245 if (DECL_ANTICIPATED (olddecl))
1248 /* If you declare a built-in or predefined function name as static,
1249 the old definition is overridden, but optionally warn this was a
1250 bad choice of name. */
1251 if (! TREE_PUBLIC (newdecl))
1253 warning (OPT_Wshadow,
1254 DECL_BUILT_IN (olddecl)
1255 ? G_("shadowing built-in function %q#D")
1256 : G_("shadowing library function %q#D"), olddecl);
1257 /* Discard the old built-in function. */
1260 /* If the built-in is not ansi, then programs can override
1261 it even globally without an error. */
1262 else if (! DECL_BUILT_IN (olddecl))
1263 warning (0, "library function %q#D redeclared as non-function %q#D",
1267 error ("declaration of %q#D", newdecl);
1268 error ("conflicts with built-in declaration %q#D",
1273 else if (!types_match)
1275 /* Avoid warnings redeclaring built-ins which have not been
1276 explicitly declared. */
1277 if (DECL_ANTICIPATED (olddecl))
1279 /* Deal with fileptr_type_node. FILE type is not known
1280 at the time we create the builtins. */
1283 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1284 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1286 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1289 else if (TREE_VALUE (t2) == fileptr_type_node)
1291 tree t = TREE_VALUE (t1);
1293 if (TREE_CODE (t) == POINTER_TYPE
1294 && TYPE_NAME (TREE_TYPE (t))
1295 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1296 == get_identifier ("FILE")
1297 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1299 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1301 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1302 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1303 types_match = decls_match (newdecl, olddecl);
1305 return duplicate_decls (newdecl, olddecl,
1307 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1310 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1313 else if ((DECL_EXTERN_C_P (newdecl)
1314 && DECL_EXTERN_C_P (olddecl))
1315 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1316 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1318 /* A near match; override the builtin. */
1320 if (TREE_PUBLIC (newdecl))
1322 warning (0, "new declaration %q#D", newdecl);
1323 warning (0, "ambiguates built-in declaration %q#D",
1327 warning (OPT_Wshadow,
1328 DECL_BUILT_IN (olddecl)
1329 ? G_("shadowing built-in function %q#D")
1330 : G_("shadowing library function %q#D"), olddecl);
1333 /* Discard the old built-in function. */
1336 /* Replace the old RTL to avoid problems with inlining. */
1337 COPY_DECL_RTL (newdecl, olddecl);
1339 /* Even if the types match, prefer the new declarations type for
1340 built-ins which have not been explicitly declared, for
1341 exception lists, etc... */
1342 else if (DECL_IS_BUILTIN (olddecl))
1344 tree type = TREE_TYPE (newdecl);
1345 tree attribs = (*targetm.merge_type_attributes)
1346 (TREE_TYPE (olddecl), type);
1348 type = cp_build_type_attribute_variant (type, attribs);
1349 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1352 /* If a function is explicitly declared "throw ()", propagate that to
1353 the corresponding builtin. */
1354 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1355 && DECL_ANTICIPATED (olddecl)
1356 && TREE_NOTHROW (newdecl)
1357 && !TREE_NOTHROW (olddecl)
1358 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1359 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1361 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1363 /* Whether or not the builtin can throw exceptions has no
1364 bearing on this declarator. */
1365 TREE_NOTHROW (olddecl) = 0;
1367 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1369 /* If a builtin function is redeclared as `static', merge
1370 the declarations, but make the original one static. */
1371 DECL_THIS_STATIC (olddecl) = 1;
1372 TREE_PUBLIC (olddecl) = 0;
1374 /* Make the old declaration consistent with the new one so
1375 that all remnants of the builtin-ness of this function
1376 will be banished. */
1377 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1378 COPY_DECL_RTL (newdecl, olddecl);
1381 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1383 /* C++ Standard, 3.3, clause 4:
1384 "[Note: a namespace name or a class template name must be unique
1385 in its declarative region (7.3.2, clause 14). ]" */
1386 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1387 && TREE_CODE (newdecl) != NAMESPACE_DECL
1388 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1389 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1390 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1391 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1393 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1394 && TREE_CODE (newdecl) != TYPE_DECL)
1395 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1396 && TREE_CODE (olddecl) != TYPE_DECL))
1398 /* We do nothing special here, because C++ does such nasty
1399 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1400 get shadowed, and know that if we need to find a TYPE_DECL
1401 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1402 slot of the identifier. */
1406 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1407 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1408 || (TREE_CODE (olddecl) == FUNCTION_DECL
1409 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1413 error ("%q#D redeclared as different kind of symbol", newdecl);
1414 if (TREE_CODE (olddecl) == TREE_LIST)
1415 olddecl = TREE_VALUE (olddecl);
1416 error ("previous declaration of %q+#D", olddecl);
1418 return error_mark_node;
1420 else if (!types_match)
1422 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1423 /* These are certainly not duplicate declarations; they're
1424 from different scopes. */
1427 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1429 /* The name of a class template may not be declared to refer to
1430 any other template, class, function, object, namespace, value,
1431 or type in the same scope. */
1432 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1433 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1435 error ("declaration of template %q#D", newdecl);
1436 error ("conflicts with previous declaration %q+#D", olddecl);
1438 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1439 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1440 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1441 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1442 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1443 DECL_TEMPLATE_PARMS (olddecl))
1444 /* Template functions can be disambiguated by
1446 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1447 TREE_TYPE (TREE_TYPE (olddecl))))
1449 error ("new declaration %q#D", newdecl);
1450 error ("ambiguates old declaration %q+#D", olddecl);
1454 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1456 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1458 error ("declaration of C function %q#D conflicts with",
1460 error ("previous declaration %q+#D here", olddecl);
1463 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1464 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1466 error ("new declaration %q#D", newdecl);
1467 error ("ambiguates old declaration %q+#D", olddecl);
1468 return error_mark_node;
1475 error ("conflicting declaration %q#D", newdecl);
1476 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1477 return error_mark_node;
1480 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1481 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1482 && (!DECL_TEMPLATE_INFO (newdecl)
1483 || (DECL_TI_TEMPLATE (newdecl)
1484 != DECL_TI_TEMPLATE (olddecl))))
1485 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1486 && (!DECL_TEMPLATE_INFO (olddecl)
1487 || (DECL_TI_TEMPLATE (olddecl)
1488 != DECL_TI_TEMPLATE (newdecl))))))
1489 /* It's OK to have a template specialization and a non-template
1490 with the same type, or to have specializations of two
1491 different templates with the same type. Note that if one is a
1492 specialization, and the other is an instantiation of the same
1493 template, that we do not exit at this point. That situation
1494 can occur if we instantiate a template class, and then
1495 specialize one of its methods. This situation is valid, but
1496 the declarations must be merged in the usual way. */
1498 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1499 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1500 && !DECL_USE_TEMPLATE (newdecl))
1501 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1502 && !DECL_USE_TEMPLATE (olddecl))))
1503 /* One of the declarations is a template instantiation, and the
1504 other is not a template at all. That's OK. */
1506 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1508 /* In [namespace.alias] we have:
1510 In a declarative region, a namespace-alias-definition can be
1511 used to redefine a namespace-alias declared in that declarative
1512 region to refer only to the namespace to which it already
1515 Therefore, if we encounter a second alias directive for the same
1516 alias, we can just ignore the second directive. */
1517 if (DECL_NAMESPACE_ALIAS (newdecl)
1518 && (DECL_NAMESPACE_ALIAS (newdecl)
1519 == DECL_NAMESPACE_ALIAS (olddecl)))
1521 /* [namespace.alias]
1523 A namespace-name or namespace-alias shall not be declared as
1524 the name of any other entity in the same declarative region.
1525 A namespace-name defined at global scope shall not be
1526 declared as the name of any other entity in any global scope
1528 error ("declaration of namespace %qD conflicts with", newdecl);
1529 error ("previous declaration of namespace %q+D here", olddecl);
1530 return error_mark_node;
1534 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1537 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1538 if (DECL_NAME (olddecl) != NULL_TREE)
1539 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1540 ? "%q+#D previously defined here"
1541 : "%q+#D previously declared here", olddecl);
1542 return error_mark_node;
1544 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1545 && DECL_INITIAL (olddecl) != NULL_TREE
1546 && !prototype_p (TREE_TYPE (olddecl))
1547 && prototype_p (TREE_TYPE (newdecl)))
1549 /* Prototype decl follows defn w/o prototype. */
1550 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1551 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1552 "follows non-prototype definition here");
1554 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1555 || TREE_CODE (olddecl) == VAR_DECL)
1556 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1559 If two declarations of the same function or object
1560 specify different linkage-specifications ..., the program
1561 is ill-formed.... Except for functions with C++ linkage,
1562 a function declaration without a linkage specification
1563 shall not precede the first linkage specification for
1564 that function. A function can be declared without a
1565 linkage specification after an explicit linkage
1566 specification has been seen; the linkage explicitly
1567 specified in the earlier declaration is not affected by
1568 such a function declaration.
1570 DR 563 raises the question why the restrictions on
1571 functions should not also apply to objects. Older
1572 versions of G++ silently ignore the linkage-specification
1580 which is clearly wrong. Therefore, we now treat objects
1582 if (current_lang_depth () == 0)
1584 /* There is no explicit linkage-specification, so we use
1585 the linkage from the previous declaration. */
1586 if (!DECL_LANG_SPECIFIC (newdecl))
1587 retrofit_lang_decl (newdecl);
1588 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1592 error ("previous declaration of %q+#D with %qL linkage",
1593 olddecl, DECL_LANGUAGE (olddecl));
1594 error ("conflicts with new declaration with %qL linkage",
1595 DECL_LANGUAGE (newdecl));
1599 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1601 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1603 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1604 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1607 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1608 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1610 for (; t1 && t1 != void_list_node;
1611 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1612 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1614 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1617 permerror (input_location, "default argument given for parameter %d of %q#D",
1619 permerror (input_location, "after previous specification in %q+#D", olddecl);
1623 error ("default argument given for parameter %d of %q#D",
1625 error ("after previous specification in %q+#D",
1632 /* Do not merge an implicit typedef with an explicit one. In:
1636 typedef class A A __attribute__ ((foo));
1638 the attribute should apply only to the typedef. */
1639 if (TREE_CODE (olddecl) == TYPE_DECL
1640 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1641 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1644 /* If new decl is `static' and an `extern' was seen previously,
1646 warn_extern_redeclared_static (newdecl, olddecl);
1648 if (!validate_constexpr_redeclaration (olddecl, newdecl))
1649 return error_mark_node;
1651 /* We have committed to returning 1 at this point. */
1652 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1654 /* Now that functions must hold information normally held
1655 by field decls, there is extra work to do so that
1656 declaration information does not get destroyed during
1658 if (DECL_VINDEX (olddecl))
1659 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1660 if (DECL_CONTEXT (olddecl))
1661 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1662 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1663 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1664 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1665 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1666 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1667 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1668 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1669 SET_OVERLOADED_OPERATOR_CODE
1670 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1671 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1673 /* Optionally warn about more than one declaration for the same
1674 name, but don't warn about a function declaration followed by a
1676 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1677 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1678 /* Don't warn about extern decl followed by definition. */
1679 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1680 /* Don't warn about friends, let add_friend take care of it. */
1681 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1683 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1684 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1687 if (DECL_DELETED_FN (newdecl))
1689 error ("deleted definition of %qD", newdecl);
1690 error ("after previous declaration %q+D", olddecl);
1692 DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
1695 /* Deal with C++: must preserve virtual function table size. */
1696 if (TREE_CODE (olddecl) == TYPE_DECL)
1698 tree newtype = TREE_TYPE (newdecl);
1699 tree oldtype = TREE_TYPE (olddecl);
1701 if (newtype != error_mark_node && oldtype != error_mark_node
1702 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1703 CLASSTYPE_FRIEND_CLASSES (newtype)
1704 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1706 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1709 /* Copy all the DECL_... slots specified in the new decl
1710 except for any that we copy here from the old type. */
1711 DECL_ATTRIBUTES (newdecl)
1712 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1714 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1718 old_result = DECL_TEMPLATE_RESULT (olddecl);
1719 new_result = DECL_TEMPLATE_RESULT (newdecl);
1720 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1721 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1722 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1723 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1725 DECL_ATTRIBUTES (old_result)
1726 = (*targetm.merge_decl_attributes) (old_result, new_result);
1728 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1730 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1731 && DECL_INITIAL (new_result))
1733 if (DECL_INITIAL (old_result))
1734 DECL_UNINLINABLE (old_result) = 1;
1736 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1737 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1738 DECL_NOT_REALLY_EXTERN (old_result)
1739 = DECL_NOT_REALLY_EXTERN (new_result);
1740 DECL_INTERFACE_KNOWN (old_result)
1741 = DECL_INTERFACE_KNOWN (new_result);
1742 DECL_DECLARED_INLINE_P (old_result)
1743 = DECL_DECLARED_INLINE_P (new_result);
1744 DECL_DISREGARD_INLINE_LIMITS (old_result)
1745 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1750 DECL_DECLARED_INLINE_P (old_result)
1751 |= DECL_DECLARED_INLINE_P (new_result);
1752 DECL_DISREGARD_INLINE_LIMITS (old_result)
1753 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1754 check_redeclaration_exception_specification (newdecl, olddecl);
1758 /* If the new declaration is a definition, update the file and
1759 line information on the declaration, and also make
1760 the old declaration the same definition. */
1761 if (DECL_INITIAL (new_result) != NULL_TREE)
1763 DECL_SOURCE_LOCATION (olddecl)
1764 = DECL_SOURCE_LOCATION (old_result)
1765 = DECL_SOURCE_LOCATION (newdecl);
1766 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1767 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1770 DECL_ARGUMENTS (old_result)
1771 = DECL_ARGUMENTS (new_result);
1772 for (parm = DECL_ARGUMENTS (old_result); parm;
1773 parm = DECL_CHAIN (parm))
1774 DECL_CONTEXT (parm) = old_result;
1783 /* Automatically handles default parameters. */
1784 tree oldtype = TREE_TYPE (olddecl);
1787 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1788 maybe_instantiate_noexcept (olddecl);
1790 /* Merge the data types specified in the two decls. */
1791 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1793 /* If merge_types produces a non-typedef type, just use the old type. */
1794 if (TREE_CODE (newdecl) == TYPE_DECL
1795 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1798 if (TREE_CODE (newdecl) == VAR_DECL)
1800 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1801 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1802 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1803 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1804 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1805 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1807 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1808 if (DECL_LANG_SPECIFIC (olddecl)
1809 && CP_DECL_THREADPRIVATE_P (olddecl))
1811 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1812 if (!DECL_LANG_SPECIFIC (newdecl))
1813 retrofit_lang_decl (newdecl);
1815 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1816 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1820 /* Do this after calling `merge_types' so that default
1821 parameters don't confuse us. */
1822 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1823 check_redeclaration_exception_specification (newdecl, olddecl);
1824 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1826 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1827 check_default_args (newdecl);
1829 /* Lay the type out, unless already done. */
1830 if (! same_type_p (newtype, oldtype)
1831 && TREE_TYPE (newdecl) != error_mark_node
1832 && !(processing_template_decl && uses_template_parms (newdecl)))
1833 layout_type (TREE_TYPE (newdecl));
1835 if ((TREE_CODE (newdecl) == VAR_DECL
1836 || TREE_CODE (newdecl) == PARM_DECL
1837 || TREE_CODE (newdecl) == RESULT_DECL
1838 || TREE_CODE (newdecl) == FIELD_DECL
1839 || TREE_CODE (newdecl) == TYPE_DECL)
1840 && !(processing_template_decl && uses_template_parms (newdecl)))
1841 layout_decl (newdecl, 0);
1843 /* Merge the type qualifiers. */
1844 if (TREE_READONLY (newdecl))
1845 TREE_READONLY (olddecl) = 1;
1846 if (TREE_THIS_VOLATILE (newdecl))
1847 TREE_THIS_VOLATILE (olddecl) = 1;
1848 if (TREE_NOTHROW (newdecl))
1849 TREE_NOTHROW (olddecl) = 1;
1851 /* Merge deprecatedness. */
1852 if (TREE_DEPRECATED (newdecl))
1853 TREE_DEPRECATED (olddecl) = 1;
1855 /* Preserve function specific target and optimization options */
1856 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1858 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1859 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1860 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1861 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1863 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1864 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1865 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1866 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1869 /* Merge the initialization information. */
1870 if (DECL_INITIAL (newdecl) == NULL_TREE
1871 && DECL_INITIAL (olddecl) != NULL_TREE)
1873 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1874 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1875 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1877 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1878 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1882 /* Merge the section attribute.
1883 We want to issue an error if the sections conflict but that must be
1884 done later in decl_attributes since we are called before attributes
1886 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1887 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1889 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1891 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1892 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1893 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1894 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1895 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1896 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1897 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1898 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1899 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1900 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1901 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1902 /* Keep the old RTL. */
1903 COPY_DECL_RTL (olddecl, newdecl);
1905 else if (TREE_CODE (newdecl) == VAR_DECL
1906 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1908 /* Keep the old RTL. We cannot keep the old RTL if the old
1909 declaration was for an incomplete object and the new
1910 declaration is not since many attributes of the RTL will
1912 COPY_DECL_RTL (olddecl, newdecl);
1915 /* If cannot merge, then use the new type and qualifiers,
1916 and don't preserve the old rtl. */
1919 /* Clean out any memory we had of the old declaration. */
1920 tree oldstatic = value_member (olddecl, static_aggregates);
1922 TREE_VALUE (oldstatic) = error_mark_node;
1924 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1925 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1926 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1927 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1930 /* Merge the storage class information. */
1931 merge_weak (newdecl, olddecl);
1933 if (DECL_ONE_ONLY (olddecl))
1934 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1936 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1937 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1938 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1939 if (! DECL_EXTERNAL (olddecl))
1940 DECL_EXTERNAL (newdecl) = 0;
1942 new_template_info = NULL_TREE;
1943 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1945 bool new_redefines_gnu_inline = false;
1947 if (new_defines_function
1948 && ((DECL_INTERFACE_KNOWN (olddecl)
1949 && TREE_CODE (olddecl) == FUNCTION_DECL)
1950 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1951 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1952 == FUNCTION_DECL))))
1956 if (TREE_CODE (fn) == TEMPLATE_DECL)
1957 fn = DECL_TEMPLATE_RESULT (olddecl);
1959 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1962 if (!new_redefines_gnu_inline)
1964 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1965 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1966 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1968 DECL_TEMPLATE_INSTANTIATED (newdecl)
1969 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1970 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1972 /* If the OLDDECL is an instantiation and/or specialization,
1973 then the NEWDECL must be too. But, it may not yet be marked
1974 as such if the caller has created NEWDECL, but has not yet
1975 figured out that it is a redeclaration. */
1976 if (!DECL_USE_TEMPLATE (newdecl))
1977 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1979 /* Don't really know how much of the language-specific
1980 values we should copy from old to new. */
1981 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1982 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1983 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1984 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1986 if (LANG_DECL_HAS_MIN (newdecl))
1988 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1989 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1990 if (DECL_TEMPLATE_INFO (newdecl))
1991 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1992 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1994 /* Only functions have these fields. */
1995 if (TREE_CODE (newdecl) == FUNCTION_DECL
1996 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1998 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1999 olddecl_friend = DECL_FRIEND_P (olddecl);
2000 hidden_friend = (DECL_ANTICIPATED (olddecl)
2001 && DECL_HIDDEN_FRIEND_P (olddecl)
2002 && newdecl_is_friend);
2003 DECL_BEFRIENDING_CLASSES (newdecl)
2004 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2005 DECL_BEFRIENDING_CLASSES (olddecl));
2006 /* DECL_THUNKS is only valid for virtual functions,
2007 otherwise it is a DECL_FRIEND_CONTEXT. */
2008 if (DECL_VIRTUAL_P (newdecl))
2009 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2011 /* Only variables have this field. */
2012 else if (TREE_CODE (newdecl) == VAR_DECL
2013 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2014 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2017 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2021 /* Merge parameter attributes. */
2022 tree oldarg, newarg;
2023 for (oldarg = DECL_ARGUMENTS(olddecl),
2024 newarg = DECL_ARGUMENTS(newdecl);
2026 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2027 DECL_ATTRIBUTES (newarg)
2028 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2029 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2032 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2033 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2035 /* If newdecl is not a specialization, then it is not a
2036 template-related function at all. And that means that we
2037 should have exited above, returning 0. */
2038 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2040 if (DECL_ODR_USED (olddecl))
2041 /* From [temp.expl.spec]:
2043 If a template, a member template or the member of a class
2044 template is explicitly specialized then that
2045 specialization shall be declared before the first use of
2046 that specialization that would cause an implicit
2047 instantiation to take place, in every translation unit in
2048 which such a use occurs. */
2049 error ("explicit specialization of %qD after first use",
2052 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2054 /* Don't propagate visibility from the template to the
2055 specialization here. We'll do that in determine_visibility if
2057 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2059 /* [temp.expl.spec/14] We don't inline explicit specialization
2060 just because the primary template says so. */
2062 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2063 the always_inline attribute. */
2064 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2065 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2067 if (DECL_DECLARED_INLINE_P (newdecl))
2068 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2070 DECL_ATTRIBUTES (newdecl)
2071 = remove_attribute ("always_inline",
2072 DECL_ATTRIBUTES (newdecl));
2075 else if (new_defines_function && DECL_INITIAL (olddecl))
2077 /* Never inline re-defined extern inline functions.
2078 FIXME: this could be better handled by keeping both
2079 function as separate declarations. */
2080 DECL_UNINLINABLE (newdecl) = 1;
2084 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2085 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2087 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2089 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2090 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2092 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2093 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2094 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2095 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2098 /* Preserve abstractness on cloned [cd]tors. */
2099 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2101 /* Update newdecl's parms to point at olddecl. */
2102 for (parm = DECL_ARGUMENTS (newdecl); parm;
2103 parm = DECL_CHAIN (parm))
2104 DECL_CONTEXT (parm) = olddecl;
2108 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2109 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2110 COPY_DECL_RTL (newdecl, olddecl);
2112 if (! types_match || new_defines_function)
2114 /* These need to be copied so that the names are available.
2115 Note that if the types do match, we'll preserve inline
2116 info and other bits, but if not, we won't. */
2117 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2118 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2120 if (new_defines_function)
2121 /* If defining a function declared with other language
2122 linkage, use the previously declared language linkage. */
2123 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2124 else if (types_match)
2126 /* If redeclaring a builtin function, and not a definition,
2127 it stays built in. */
2128 if (DECL_BUILT_IN (olddecl))
2130 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2131 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2132 /* If we're keeping the built-in definition, keep the rtl,
2133 regardless of declaration matches. */
2134 COPY_DECL_RTL (olddecl, newdecl);
2137 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2138 /* Don't clear out the arguments if we're just redeclaring a
2140 if (DECL_ARGUMENTS (olddecl))
2141 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2144 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2145 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2147 /* Now preserve various other info from the definition. */
2148 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2149 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2150 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2151 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2153 /* Warn about conflicting visibility specifications. */
2154 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2155 && DECL_VISIBILITY_SPECIFIED (newdecl)
2156 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2158 warning_at (input_location, OPT_Wattributes,
2159 "%q+D: visibility attribute ignored because it", newdecl);
2160 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2161 "conflicts with previous declaration here");
2163 /* Choose the declaration which specified visibility. */
2164 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2166 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2167 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2169 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2170 so keep this behavior. */
2171 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2173 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2174 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2176 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2177 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2178 if (TREE_CODE (newdecl) == FIELD_DECL)
2179 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2181 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2182 with that from NEWDECL below. */
2183 if (DECL_LANG_SPECIFIC (olddecl))
2185 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2186 != DECL_LANG_SPECIFIC (newdecl));
2187 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2190 /* Merge the USED information. */
2191 if (TREE_USED (olddecl))
2192 TREE_USED (newdecl) = 1;
2193 else if (TREE_USED (newdecl))
2194 TREE_USED (olddecl) = 1;
2195 if (TREE_CODE (newdecl) == VAR_DECL)
2197 if (DECL_READ_P (olddecl))
2198 DECL_READ_P (newdecl) = 1;
2199 else if (DECL_READ_P (newdecl))
2200 DECL_READ_P (olddecl) = 1;
2202 if (DECL_PRESERVE_P (olddecl))
2203 DECL_PRESERVE_P (newdecl) = 1;
2204 else if (DECL_PRESERVE_P (newdecl))
2205 DECL_PRESERVE_P (olddecl) = 1;
2207 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2211 function_size = sizeof (struct tree_decl_common);
2213 memcpy ((char *) olddecl + sizeof (struct tree_common),
2214 (char *) newdecl + sizeof (struct tree_common),
2215 function_size - sizeof (struct tree_common));
2217 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2218 (char *) newdecl + sizeof (struct tree_decl_common),
2219 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2220 if (new_template_info)
2221 /* If newdecl is a template instantiation, it is possible that
2222 the following sequence of events has occurred:
2224 o A friend function was declared in a class template. The
2225 class template was instantiated.
2227 o The instantiation of the friend declaration was
2228 recorded on the instantiation list, and is newdecl.
2230 o Later, however, instantiate_class_template called pushdecl
2231 on the newdecl to perform name injection. But, pushdecl in
2232 turn called duplicate_decls when it discovered that another
2233 declaration of a global function with the same name already
2236 o Here, in duplicate_decls, we decided to clobber newdecl.
2238 If we're going to do that, we'd better make sure that
2239 olddecl, and not newdecl, is on the list of
2240 instantiations so that if we try to do the instantiation
2241 again we won't get the clobbered declaration. */
2242 reregister_specialization (newdecl,
2248 size_t size = tree_code_size (TREE_CODE (olddecl));
2249 memcpy ((char *) olddecl + sizeof (struct tree_common),
2250 (char *) newdecl + sizeof (struct tree_common),
2251 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2252 switch (TREE_CODE (olddecl))
2262 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2263 (char *) newdecl + sizeof (struct tree_decl_common),
2264 size - sizeof (struct tree_decl_common)
2265 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2269 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2270 (char *) newdecl + sizeof (struct tree_decl_common),
2271 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2272 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2276 DECL_UID (olddecl) = olddecl_uid;
2278 DECL_FRIEND_P (olddecl) = 1;
2281 DECL_ANTICIPATED (olddecl) = 1;
2282 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2285 /* NEWDECL contains the merged attribute lists.
2286 Update OLDDECL to be the same. */
2287 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2289 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2290 so that encode_section_info has a chance to look at the new decl
2291 flags and attributes. */
2292 if (DECL_RTL_SET_P (olddecl)
2293 && (TREE_CODE (olddecl) == FUNCTION_DECL
2294 || (TREE_CODE (olddecl) == VAR_DECL
2295 && TREE_STATIC (olddecl))))
2296 make_decl_rtl (olddecl);
2298 /* The NEWDECL will no longer be needed. Because every out-of-class
2299 declaration of a member results in a call to duplicate_decls,
2300 freeing these nodes represents in a significant savings. */
2306 /* Return zero if the declaration NEWDECL is valid
2307 when the declaration OLDDECL (assumed to be for the same name)
2308 has already been seen.
2309 Otherwise return an error message format string with a %s
2310 where the identifier should go. */
2313 redeclaration_error_message (tree newdecl, tree olddecl)
2315 if (TREE_CODE (newdecl) == TYPE_DECL)
2317 /* Because C++ can put things into name space for free,
2318 constructs like "typedef struct foo { ... } foo"
2319 would look like an erroneous redeclaration. */
2320 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2323 return G_("redefinition of %q#D");
2325 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2327 /* If this is a pure function, its olddecl will actually be
2328 the original initialization to `0' (which we force to call
2329 abort()). Don't complain about redefinition in this case. */
2330 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2331 && DECL_INITIAL (olddecl) == NULL_TREE)
2334 /* If both functions come from different namespaces, this is not
2335 a redeclaration - this is a conflict with a used function. */
2336 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2337 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2338 && ! decls_match (olddecl, newdecl))
2339 return G_("%qD conflicts with used function");
2341 /* We'll complain about linkage mismatches in
2342 warn_extern_redeclared_static. */
2344 /* Defining the same name twice is no good. */
2345 if (DECL_INITIAL (olddecl) != NULL_TREE
2346 && DECL_INITIAL (newdecl) != NULL_TREE)
2348 if (DECL_NAME (olddecl) == NULL_TREE)
2349 return G_("%q#D not declared in class");
2350 else if (!GNU_INLINE_P (olddecl)
2351 || GNU_INLINE_P (newdecl))
2352 return G_("redefinition of %q#D");
2355 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2357 bool olda = GNU_INLINE_P (olddecl);
2358 bool newa = GNU_INLINE_P (newdecl);
2363 return G_("%q+D redeclared inline with "
2364 "%<gnu_inline%> attribute");
2366 return G_("%q+D redeclared inline without "
2367 "%<gnu_inline%> attribute");
2373 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2377 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2379 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2380 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2381 return G_("redefinition of %q#D");
2385 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2386 || (DECL_TEMPLATE_RESULT (newdecl)
2387 == DECL_TEMPLATE_RESULT (olddecl)))
2390 nt = DECL_TEMPLATE_RESULT (newdecl);
2391 if (DECL_TEMPLATE_INFO (nt))
2392 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2393 ot = DECL_TEMPLATE_RESULT (olddecl);
2394 if (DECL_TEMPLATE_INFO (ot))
2395 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2396 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2397 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2398 return G_("redefinition of %q#D");
2400 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2402 bool olda = GNU_INLINE_P (ot);
2403 bool newa = GNU_INLINE_P (nt);
2408 return G_("%q+D redeclared inline with "
2409 "%<gnu_inline%> attribute");
2411 return G_("%q+D redeclared inline without "
2412 "%<gnu_inline%> attribute");
2416 /* Core issue #226 (C++0x):
2418 If a friend function template declaration specifies a
2419 default template-argument, that declaration shall be a
2420 definition and shall be the only declaration of the
2421 function template in the translation unit. */
2422 if ((cxx_dialect != cxx98)
2423 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2424 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2425 /*is_primary=*/1, /*is_partial=*/0,
2426 /*is_friend_decl=*/2))
2427 return G_("redeclaration of friend %q#D "
2428 "may not have default template arguments");
2432 else if (TREE_CODE (newdecl) == VAR_DECL
2433 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2434 && (! DECL_LANG_SPECIFIC (olddecl)
2435 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2436 || DECL_THREAD_LOCAL_P (newdecl)))
2438 /* Only variables can be thread-local, and all declarations must
2439 agree on this property. */
2440 if (DECL_THREAD_LOCAL_P (newdecl))
2441 return G_("thread-local declaration of %q#D follows "
2442 "non-thread-local declaration");
2444 return G_("non-thread-local declaration of %q#D follows "
2445 "thread-local declaration");
2447 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2449 /* The objects have been declared at namespace scope. If either
2450 is a member of an anonymous union, then this is an invalid
2451 redeclaration. For example:
2457 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2458 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2459 return G_("redeclaration of %q#D");
2460 /* If at least one declaration is a reference, there is no
2461 conflict. For example:
2467 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2469 /* Reject two definitions. */
2470 return G_("redefinition of %q#D");
2474 /* Objects declared with block scope: */
2475 /* Reject two definitions, and reject a definition
2476 together with an external reference. */
2477 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2478 return G_("redeclaration of %q#D");
2483 /* Hash and equality functions for the named_label table. */
2486 named_label_entry_hash (const void *data)
2488 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2489 return DECL_UID (ent->label_decl);
2493 named_label_entry_eq (const void *a, const void *b)
2495 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2496 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2497 return ent_a->label_decl == ent_b->label_decl;
2500 /* Create a new label, named ID. */
2503 make_label_decl (tree id, int local_p)
2505 struct named_label_entry *ent;
2509 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2511 DECL_CONTEXT (decl) = current_function_decl;
2512 DECL_MODE (decl) = VOIDmode;
2513 C_DECLARED_LABEL_FLAG (decl) = local_p;
2515 /* Say where one reference is to the label, for the sake of the
2516 error if it is not defined. */
2517 DECL_SOURCE_LOCATION (decl) = input_location;
2519 /* Record the fact that this identifier is bound to this label. */
2520 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2522 /* Create the label htab for the function on demand. */
2524 named_labels = htab_create_ggc (13, named_label_entry_hash,
2525 named_label_entry_eq, NULL);
2527 /* Record this label on the list of labels used in this function.
2528 We do this before calling make_label_decl so that we get the
2529 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2530 ent = ggc_alloc_cleared_named_label_entry ();
2531 ent->label_decl = decl;
2533 slot = htab_find_slot (named_labels, ent, INSERT);
2534 gcc_assert (*slot == NULL);
2540 /* Look for a label named ID in the current function. If one cannot
2541 be found, create one. (We keep track of used, but undefined,
2542 labels, and complain about them at the end of a function.) */
2545 lookup_label_1 (tree id)
2549 /* You can't use labels at global scope. */
2550 if (current_function_decl == NULL_TREE)
2552 error ("label %qE referenced outside of any function", id);
2556 /* See if we've already got this label. */
2557 decl = IDENTIFIER_LABEL_VALUE (id);
2558 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2561 decl = make_label_decl (id, /*local_p=*/0);
2565 /* Wrapper for lookup_label_1. */
2568 lookup_label (tree id)
2571 bool subtime = timevar_cond_start (TV_NAME_LOOKUP);
2572 ret = lookup_label_1 (id);
2573 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
2577 /* Declare a local label named ID. */
2580 declare_local_label (tree id)
2583 cp_label_binding *bind;
2585 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2586 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2587 bind = VEC_safe_push (cp_label_binding, gc,
2588 current_binding_level->shadowed_labels, NULL);
2589 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2591 decl = make_label_decl (id, /*local_p=*/1);
2597 /* Returns nonzero if it is ill-formed to jump past the declaration of
2598 DECL. Returns 2 if it's also a real problem. */
2601 decl_jump_unsafe (tree decl)
2603 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2604 with automatic storage duration is not in scope to a point where it is
2605 in scope is ill-formed unless the variable has scalar type, class type
2606 with a trivial default constructor and a trivial destructor, a
2607 cv-qualified version of one of these types, or an array of one of the
2608 preceding types and is declared without an initializer (8.5). */
2609 tree type = TREE_TYPE (decl);
2611 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2612 || type == error_mark_node)
2615 type = strip_array_types (type);
2617 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2618 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2621 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2627 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2630 identify_goto (tree decl, const location_t *locus)
2633 permerror (input_location, "jump to label %qD", decl);
2635 permerror (input_location, "jump to case label");
2637 permerror (*locus, " from here");
2640 /* Check that a single previously seen jump to a newly defined label
2641 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2642 the jump context; NAMES are the names in scope in LEVEL at the jump
2643 context; LOCUS is the source position of the jump or 0. Returns
2644 true if all is well. */
2647 check_previous_goto_1 (tree decl, cp_binding_level* level, tree names,
2648 bool exited_omp, const location_t *locus)
2650 cp_binding_level *b;
2651 bool identified = false, saw_eh = false, saw_omp = false;
2655 identify_goto (decl, locus);
2656 error (" exits OpenMP structured block");
2657 identified = saw_omp = true;
2660 for (b = current_binding_level; b ; b = b->level_chain)
2662 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2664 for (new_decls = b->names; new_decls != old_decls;
2665 new_decls = DECL_CHAIN (new_decls))
2667 int problem = decl_jump_unsafe (new_decls);
2673 identify_goto (decl, locus);
2677 error (" crosses initialization of %q+#D", new_decls);
2679 permerror (input_location, " enters scope of %q+#D which has "
2680 "non-trivial destructor", new_decls);
2685 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2689 identify_goto (decl, locus);
2692 if (b->kind == sk_try)
2693 error (" enters try block");
2695 error (" enters catch block");
2698 if (b->kind == sk_omp && !saw_omp)
2702 identify_goto (decl, locus);
2705 error (" enters OpenMP structured block");
2714 check_previous_goto (tree decl, struct named_label_use_entry *use)
2716 check_previous_goto_1 (decl, use->binding_level,
2717 use->names_in_scope, use->in_omp_scope,
2718 &use->o_goto_locus);
2722 check_switch_goto (cp_binding_level* level)
2724 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2727 /* Check that a new jump to a label DECL is OK. Called by
2728 finish_goto_stmt. */
2731 check_goto (tree decl)
2733 struct named_label_entry *ent, dummy;
2734 bool saw_catch = false, identified = false;
2738 /* We can't know where a computed goto is jumping.
2739 So we assume that it's OK. */
2740 if (TREE_CODE (decl) != LABEL_DECL)
2743 /* We didn't record any information about this label when we created it,
2744 and there's not much point since it's trivial to analyze as a return. */
2745 if (decl == cdtor_label)
2748 dummy.label_decl = decl;
2749 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2750 gcc_assert (ent != NULL);
2752 /* If the label hasn't been defined yet, defer checking. */
2753 if (! DECL_INITIAL (decl))
2755 struct named_label_use_entry *new_use;
2757 /* Don't bother creating another use if the last goto had the
2758 same data, and will therefore create the same set of errors. */
2760 && ent->uses->names_in_scope == current_binding_level->names)
2763 new_use = ggc_alloc_named_label_use_entry ();
2764 new_use->binding_level = current_binding_level;
2765 new_use->names_in_scope = current_binding_level->names;
2766 new_use->o_goto_locus = input_location;
2767 new_use->in_omp_scope = false;
2769 new_use->next = ent->uses;
2770 ent->uses = new_use;
2774 if (ent->in_try_scope || ent->in_catch_scope
2775 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2777 permerror (input_location, "jump to label %q+D", decl);
2778 permerror (input_location, " from here");
2782 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2784 int u = decl_jump_unsafe (bad);
2786 if (u > 1 && DECL_ARTIFICIAL (bad))
2788 /* Can't skip init of __exception_info. */
2789 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2793 error (" skips initialization of %q+#D", bad);
2795 permerror (input_location, " enters scope of %q+#D which has "
2796 "non-trivial destructor", bad);
2799 if (ent->in_try_scope)
2800 error (" enters try block");
2801 else if (ent->in_catch_scope && !saw_catch)
2802 error (" enters catch block");
2804 if (ent->in_omp_scope)
2805 error (" enters OpenMP structured block");
2806 else if (flag_openmp)
2808 cp_binding_level *b;
2809 for (b = current_binding_level; b ; b = b->level_chain)
2811 if (b == ent->binding_level)
2813 if (b->kind == sk_omp)
2817 permerror (input_location, "jump to label %q+D", decl);
2818 permerror (input_location, " from here");
2821 error (" exits OpenMP structured block");
2828 /* Check that a return is ok wrt OpenMP structured blocks.
2829 Called by finish_return_stmt. Returns true if all is well. */
2832 check_omp_return (void)
2834 cp_binding_level *b;
2835 for (b = current_binding_level; b ; b = b->level_chain)
2836 if (b->kind == sk_omp)
2838 error ("invalid exit from OpenMP structured block");
2841 else if (b->kind == sk_function_parms)
2846 /* Define a label, specifying the location in the source file.
2847 Return the LABEL_DECL node for the label. */
2850 define_label_1 (location_t location, tree name)
2852 struct named_label_entry *ent, dummy;
2853 cp_binding_level *p;
2856 decl = lookup_label (name);
2858 dummy.label_decl = decl;
2859 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2860 gcc_assert (ent != NULL);
2862 /* After labels, make any new cleanups in the function go into their
2863 own new (temporary) binding contour. */
2864 for (p = current_binding_level;
2865 p->kind != sk_function_parms;
2867 p->more_cleanups_ok = 0;
2869 if (name == get_identifier ("wchar_t"))
2870 permerror (input_location, "label named wchar_t");
2872 if (DECL_INITIAL (decl) != NULL_TREE)
2874 error ("duplicate label %qD", decl);
2875 return error_mark_node;
2879 struct named_label_use_entry *use;
2881 /* Mark label as having been defined. */
2882 DECL_INITIAL (decl) = error_mark_node;
2883 /* Say where in the source. */
2884 DECL_SOURCE_LOCATION (decl) = location;
2886 ent->binding_level = current_binding_level;
2887 ent->names_in_scope = current_binding_level->names;
2889 for (use = ent->uses; use ; use = use->next)
2890 check_previous_goto (decl, use);
2897 /* Wrapper for define_label_1. */
2900 define_label (location_t location, tree name)
2903 timevar_start (TV_NAME_LOOKUP);
2904 ret = define_label_1 (location, name);
2905 timevar_stop (TV_NAME_LOOKUP);
2912 cp_binding_level *level;
2913 struct cp_switch *next;
2914 /* The SWITCH_STMT being built. */
2916 /* A splay-tree mapping the low element of a case range to the high
2917 element, or NULL_TREE if there is no high element. Used to
2918 determine whether or not a new case label duplicates an old case
2919 label. We need a tree, rather than simply a hash table, because
2920 of the GNU case range extension. */
2924 /* A stack of the currently active switch statements. The innermost
2925 switch statement is on the top of the stack. There is no need to
2926 mark the stack for garbage collection because it is only active
2927 during the processing of the body of a function, and we never
2928 collect at that point. */
2930 static struct cp_switch *switch_stack;
2932 /* Called right after a switch-statement condition is parsed.
2933 SWITCH_STMT is the switch statement being parsed. */
2936 push_switch (tree switch_stmt)
2938 struct cp_switch *p = XNEW (struct cp_switch);
2939 p->level = current_binding_level;
2940 p->next = switch_stack;
2941 p->switch_stmt = switch_stmt;
2942 p->cases = splay_tree_new (case_compare, NULL, NULL);
2949 struct cp_switch *cs = switch_stack;
2950 location_t switch_location;
2952 /* Emit warnings as needed. */
2953 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2954 if (!processing_template_decl)
2955 c_do_switch_warnings (cs->cases, switch_location,
2956 SWITCH_STMT_TYPE (cs->switch_stmt),
2957 SWITCH_STMT_COND (cs->switch_stmt));
2959 splay_tree_delete (cs->cases);
2960 switch_stack = switch_stack->next;
2964 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
2965 condition. Note that if TYPE and VALUE are already integral we don't
2966 really do the conversion because the language-independent
2967 warning/optimization code will work better that way. */
2970 case_conversion (tree type, tree value)
2972 if (value == NULL_TREE)
2975 if (cxx_dialect >= cxx0x
2976 && (SCOPED_ENUM_P (type)
2977 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value))))
2979 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
2980 type = type_promotes_to (type);
2981 value = perform_implicit_conversion (type, value, tf_warning_or_error);
2983 return cxx_constant_value (value);
2986 /* Note that we've seen a definition of a case label, and complain if this
2987 is a bad place for one. */
2990 finish_case_label (location_t loc, tree low_value, tree high_value)
2993 cp_binding_level *p;
2996 if (processing_template_decl)
3000 /* For templates, just add the case label; we'll do semantic
3001 analysis at instantiation-time. */
3002 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
3003 return add_stmt (build_case_label (low_value, high_value, label));
3006 /* Find the condition on which this switch statement depends. */
3007 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
3008 if (cond && TREE_CODE (cond) == TREE_LIST)
3009 cond = TREE_VALUE (cond);
3011 if (!check_switch_goto (switch_stack->level))
3012 return error_mark_node;
3014 type = SWITCH_STMT_TYPE (switch_stack->switch_stmt);
3016 low_value = case_conversion (type, low_value);
3017 high_value = case_conversion (type, high_value);
3019 r = c_add_case_label (loc, switch_stack->cases, cond, type,
3020 low_value, high_value);
3022 /* After labels, make any new cleanups in the function go into their
3023 own new (temporary) binding contour. */
3024 for (p = current_binding_level;
3025 p->kind != sk_function_parms;
3027 p->more_cleanups_ok = 0;
3032 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3035 typename_hash (const void* k)
3038 const_tree const t = (const_tree) k;
3040 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
3041 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
3046 typedef struct typename_info {
3054 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3055 really of type `typename_info*' */
3058 typename_compare (const void * k1, const void * k2)
3060 const_tree const t1 = (const_tree) k1;
3061 const typename_info *const t2 = (const typename_info *) k2;
3063 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3064 && TYPE_CONTEXT (t1) == t2->scope
3065 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3066 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3067 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3070 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3071 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3073 Returns the new TYPENAME_TYPE. */
3075 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3078 build_typename_type (tree context, tree name, tree fullname,
3079 enum tag_types tag_type)
3087 if (typename_htab == NULL)
3088 typename_htab = htab_create_ggc (61, &typename_hash,
3089 &typename_compare, NULL);
3091 ti.scope = FROB_CONTEXT (context);
3093 ti.template_id = fullname;
3094 ti.enum_p = tag_type == enum_type;
3095 ti.class_p = (tag_type == class_type
3096 || tag_type == record_type
3097 || tag_type == union_type);
3098 hash = (htab_hash_pointer (ti.scope)
3099 ^ htab_hash_pointer (ti.name));
3101 /* See if we already have this type. */
3102 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3107 /* Build the TYPENAME_TYPE. */
3108 t = cxx_make_type (TYPENAME_TYPE);
3109 TYPE_CONTEXT (t) = ti.scope;
3110 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3111 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3112 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3114 /* Build the corresponding TYPE_DECL. */
3115 d = build_decl (input_location, TYPE_DECL, name, t);
3116 TYPE_NAME (TREE_TYPE (d)) = d;
3117 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3118 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3119 DECL_ARTIFICIAL (d) = 1;
3121 /* Store it in the hash table. */
3124 /* TYPENAME_TYPEs must always be compared structurally, because
3125 they may or may not resolve down to another type depending on
3126 the currently open classes. */
3127 SET_TYPE_STRUCTURAL_EQUALITY (t);
3133 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3134 provided to name the type. Returns an appropriate type, unless an
3135 error occurs, in which case error_mark_node is returned. If we
3136 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3137 return that, rather than the _TYPE it corresponds to, in other
3138 cases we look through the type decl. If TF_ERROR is set, complain
3139 about errors, otherwise be quiet. */
3142 make_typename_type (tree context, tree name, enum tag_types tag_type,
3143 tsubst_flags_t complain)
3149 if (name == error_mark_node
3150 || context == NULL_TREE
3151 || context == error_mark_node)
3152 return error_mark_node;
3156 if (!(TYPE_LANG_SPECIFIC (name)
3157 && (CLASSTYPE_IS_TEMPLATE (name)
3158 || CLASSTYPE_USE_TEMPLATE (name))))
3159 name = TYPE_IDENTIFIER (name);
3161 /* Create a TEMPLATE_ID_EXPR for the type. */
3162 name = build_nt (TEMPLATE_ID_EXPR,
3163 CLASSTYPE_TI_TEMPLATE (name),
3164 CLASSTYPE_TI_ARGS (name));
3166 else if (TREE_CODE (name) == TYPE_DECL)
3167 name = DECL_NAME (name);
3171 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3173 name = TREE_OPERAND (name, 0);
3174 if (TREE_CODE (name) == TEMPLATE_DECL)
3175 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3176 else if (TREE_CODE (name) == OVERLOAD)
3178 error ("%qD is not a type", name);
3179 return error_mark_node;
3182 if (TREE_CODE (name) == TEMPLATE_DECL)
3184 error ("%qD used without template parameters", name);
3185 return error_mark_node;
3187 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3188 gcc_assert (TYPE_P (context));
3190 if (!MAYBE_CLASS_TYPE_P (context))
3192 if (complain & tf_error)
3193 error ("%q#T is not a class", context);
3194 return error_mark_node;
3197 /* When the CONTEXT is a dependent type, NAME could refer to a
3198 dependent base class of CONTEXT. But look inside it anyway
3199 if CONTEXT is a currently open scope, in case it refers to a
3200 member of the current instantiation or a non-dependent base;
3201 lookup will stop when we hit a dependent base. */
3202 if (!dependent_scope_p (context))
3203 /* We should only set WANT_TYPE when we're a nested typename type.
3204 Then we can give better diagnostics if we find a non-type. */
3205 t = lookup_field (context, name, 2, /*want_type=*/true);
3209 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3210 return build_typename_type (context, name, fullname, tag_type);
3212 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3216 if (complain & tf_error)
3217 error (want_template ? "no class template named %q#T in %q#T"
3218 : "no type named %q#T in %q#T", name, context);
3219 return error_mark_node;
3222 /* Pull out the template from an injected-class-name (or multiple). */
3224 t = maybe_get_template_decl_from_type_decl (t);
3226 if (TREE_CODE (t) == TREE_LIST)
3228 if (complain & tf_error)
3230 error ("lookup of %qT in %qT is ambiguous", name, context);
3231 print_candidates (t);
3233 return error_mark_node;
3236 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3238 if (complain & tf_error)
3239 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3241 return error_mark_node;
3243 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3245 if (complain & tf_error)
3246 error ("%<typename %T::%D%> names %q#T, which is not a type",
3248 return error_mark_node;
3251 if (complain & tf_error)
3252 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3254 /* If we are currently parsing a template and if T is a typedef accessed
3255 through CONTEXT then we need to remember and check access of T at
3256 template instantiation time. */
3257 add_typedef_to_current_template_for_access_check (t, context, input_location);
3260 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3262 /*entering_scope=*/0,
3263 tf_warning_or_error | tf_user);
3265 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3271 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3272 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3273 in which case error_mark_node is returned.
3275 If PARM_LIST is non-NULL, also make sure that the template parameter
3276 list of TEMPLATE_DECL matches.
3278 If COMPLAIN zero, don't complain about any errors that occur. */
3281 make_unbound_class_template (tree context, tree name, tree parm_list,
3282 tsubst_flags_t complain)
3288 name = TYPE_IDENTIFIER (name);
3289 else if (DECL_P (name))
3290 name = DECL_NAME (name);
3291 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3293 if (!dependent_type_p (context)
3294 || currently_open_class (context))
3296 tree tmpl = NULL_TREE;
3298 if (MAYBE_CLASS_TYPE_P (context))
3299 tmpl = lookup_field (context, name, 0, false);
3301 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3302 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3304 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3306 if (complain & tf_error)
3307 error ("no class template named %q#T in %q#T", name, context);
3308 return error_mark_node;
3312 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3314 if (complain & tf_error)
3316 error ("template parameters do not match template");
3317 error ("%q+D declared here", tmpl);
3319 return error_mark_node;
3322 if (complain & tf_error)
3323 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3328 /* Build the UNBOUND_CLASS_TEMPLATE. */
3329 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3330 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3331 TREE_TYPE (t) = NULL_TREE;
3332 SET_TYPE_STRUCTURAL_EQUALITY (t);
3334 /* Build the corresponding TEMPLATE_DECL. */
3335 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3336 TYPE_NAME (TREE_TYPE (d)) = d;
3337 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3338 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3339 DECL_ARTIFICIAL (d) = 1;
3340 DECL_TEMPLATE_PARMS (d) = parm_list;
3347 /* Push the declarations of builtin types into the namespace.
3348 RID_INDEX is the index of the builtin type in the array
3349 RID_POINTERS. NAME is the name used when looking up the builtin
3350 type. TYPE is the _TYPE node for the builtin type. */
3353 record_builtin_type (enum rid rid_index,
3357 tree rname = NULL_TREE, tname = NULL_TREE;
3358 tree tdecl = NULL_TREE;
3360 if ((int) rid_index < (int) RID_MAX)
3361 rname = ridpointers[(int) rid_index];
3363 tname = get_identifier (name);
3365 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3366 eliminated. Built-in types should not be looked up name; their
3367 names are keywords that the parser can recognize. However, there
3368 is code in c-common.c that uses identifier_global_value to look
3369 up built-in types by name. */
3372 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3373 DECL_ARTIFICIAL (tdecl) = 1;
3374 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3380 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3381 DECL_ARTIFICIAL (tdecl) = 1;
3383 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3386 if (!TYPE_NAME (type))
3387 TYPE_NAME (type) = tdecl;
3390 debug_hooks->type_decl (tdecl, 0);
3393 /* Record one of the standard Java types.
3394 * Declare it as having the given NAME.
3395 * If SIZE > 0, it is the size of one of the integral types;
3396 * otherwise it is the negative of the size of one of the other types. */
3399 record_builtin_java_type (const char* name, int size)
3404 type = build_nonstandard_integer_type (size, 0);
3405 type = build_distinct_type_copy (type);
3407 else if (size > -32)
3410 /* "__java_char" or ""__java_boolean". */
3411 type = build_nonstandard_integer_type (-size, 1);
3412 type = build_distinct_type_copy (type);
3413 /* Get the signed type cached and attached to the unsigned type,
3414 so it doesn't get garbage-collected at "random" times,
3415 causing potential codegen differences out of different UIDs
3416 and different alias set numbers. */
3417 stype = build_nonstandard_integer_type (-size, 0);
3418 stype = build_distinct_type_copy (stype);
3419 TREE_CHAIN (type) = stype;
3420 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3423 { /* "__java_float" or ""__java_double". */
3424 type = make_node (REAL_TYPE);
3425 TYPE_PRECISION (type) = - size;
3428 record_builtin_type (RID_MAX, name, type);
3429 decl = TYPE_NAME (type);
3431 /* Suppress generate debug symbol entries for these types,
3432 since for normal C++ they are just clutter.
3433 However, push_lang_context undoes this if extern "Java" is seen. */
3434 DECL_IGNORED_P (decl) = 1;
3436 TYPE_FOR_JAVA (type) = 1;
3440 /* Push a type into the namespace so that the back ends ignore it. */
3443 record_unknown_type (tree type, const char* name)
3445 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3446 TYPE_DECL, get_identifier (name), type));
3447 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3448 DECL_IGNORED_P (decl) = 1;
3449 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3450 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3451 TYPE_ALIGN (type) = 1;
3452 TYPE_USER_ALIGN (type) = 0;
3453 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3456 /* A string for which we should create an IDENTIFIER_NODE at
3459 typedef struct predefined_identifier
3461 /* The name of the identifier. */
3462 const char *const name;
3463 /* The place where the IDENTIFIER_NODE should be stored. */
3465 /* Nonzero if this is the name of a constructor or destructor. */
3466 const int ctor_or_dtor_p;
3467 } predefined_identifier;
3469 /* Create all the predefined identifiers. */
3472 initialize_predefined_identifiers (void)
3474 const predefined_identifier *pid;
3476 /* A table of identifiers to create at startup. */
3477 static const predefined_identifier predefined_identifiers[] = {
3478 { "C++", &lang_name_cplusplus, 0 },
3479 { "C", &lang_name_c, 0 },
3480 { "Java", &lang_name_java, 0 },
3481 /* Some of these names have a trailing space so that it is
3482 impossible for them to conflict with names written by users. */
3483 { "__ct ", &ctor_identifier, 1 },
3484 { "__base_ctor ", &base_ctor_identifier, 1 },
3485 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3486 { "__dt ", &dtor_identifier, 1 },
3487 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3488 { "__base_dtor ", &base_dtor_identifier, 1 },
3489 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3490 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3491 { "nelts", &nelts_identifier, 0 },
3492 { THIS_NAME, &this_identifier, 0 },
3493 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3494 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3495 { "_vptr", &vptr_identifier, 0 },
3496 { "__vtt_parm", &vtt_parm_identifier, 0 },
3497 { "::", &global_scope_name, 0 },
3498 { "std", &std_identifier, 0 },
3502 for (pid = predefined_identifiers; pid->name; ++pid)
3504 *pid->node = get_identifier (pid->name);
3505 if (pid->ctor_or_dtor_p)
3506 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3510 /* Create the predefined scalar types of C,
3511 and some nodes representing standard constants (0, 1, (void *)0).
3512 Initialize the global binding level.
3513 Make definitions for built-in primitive functions. */
3516 cxx_init_decl_processing (void)
3519 tree void_ftype_ptr;
3521 /* Create all the identifiers we need. */
3522 initialize_predefined_identifiers ();
3524 /* Create the global variables. */
3525 push_to_top_level ();
3527 current_function_decl = NULL_TREE;
3528 current_binding_level = NULL;
3529 /* Enter the global namespace. */
3530 gcc_assert (global_namespace == NULL_TREE);
3531 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3533 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3534 TREE_PUBLIC (global_namespace) = 1;
3535 begin_scope (sk_namespace, global_namespace);
3537 if (flag_visibility_ms_compat)
3538 default_visibility = VISIBILITY_HIDDEN;
3541 current_lang_name = lang_name_c;
3543 /* Create the `std' namespace. */
3544 push_namespace (std_identifier);
3545 std_node = current_namespace;
3548 c_common_nodes_and_builtins ();
3550 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3551 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3552 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3553 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3554 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3555 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3556 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3557 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3559 integer_two_node = build_int_cst (NULL_TREE, 2);
3561 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3562 truthvalue_type_node = boolean_type_node;
3563 truthvalue_false_node = boolean_false_node;
3564 truthvalue_true_node = boolean_true_node;
3566 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3567 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3568 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3571 record_builtin_type (RID_MAX, NULL, string_type_node);
3574 delta_type_node = ptrdiff_type_node;
3575 vtable_index_type = ptrdiff_type_node;
3577 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3578 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3579 void_ftype_ptr = build_function_type_list (void_type_node,
3580 ptr_type_node, NULL_TREE);
3582 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3584 /* C++ extensions */
3586 unknown_type_node = make_node (LANG_TYPE);
3587 record_unknown_type (unknown_type_node, "unknown type");
3589 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3590 TREE_TYPE (unknown_type_node) = unknown_type_node;
3592 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3594 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3595 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3597 init_list_type_node = make_node (LANG_TYPE);
3598 record_unknown_type (init_list_type_node, "init list");
3601 /* Make sure we get a unique function type, so we can give
3602 its pointer type a name. (This wins for gdb.) */
3603 tree vfunc_type = make_node (FUNCTION_TYPE);
3604 TREE_TYPE (vfunc_type) = integer_type_node;
3605 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3606 layout_type (vfunc_type);
3608 vtable_entry_type = build_pointer_type (vfunc_type);
3610 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3613 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3614 layout_type (vtbl_type_node);
3615 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3616 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3617 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3618 layout_type (vtbl_ptr_type_node);
3619 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3621 push_namespace (get_identifier ("__cxxabiv1"));
3622 abi_node = current_namespace;
3625 global_type_node = make_node (LANG_TYPE);
3626 record_unknown_type (global_type_node, "global type");
3629 current_lang_name = lang_name_cplusplus;
3633 tree newtype, deltype;
3634 tree ptr_ftype_sizetype;
3638 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3639 if (cxx_dialect == cxx98)
3642 tree bad_alloc_type_node;
3643 tree bad_alloc_decl;
3645 push_namespace (std_identifier);
3646 bad_alloc_id = get_identifier ("bad_alloc");
3647 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3648 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3650 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3651 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3655 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3658 new_eh_spec = noexcept_false_spec;
3660 /* Ensure attribs.c is initialized. */
3663 = build_tree_list (get_identifier ("alloc_size"),
3664 build_tree_list (NULL_TREE, integer_one_node));
3665 newtype = cp_build_type_attribute_variant (ptr_ftype_sizetype, newattrs);
3666 newtype = build_exception_variant (newtype, new_eh_spec);
3667 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3668 push_cp_library_fn (NEW_EXPR, newtype);
3669 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3670 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3671 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3673 nullptr_type_node = make_node (NULLPTR_TYPE);
3674 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3675 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3676 TYPE_UNSIGNED (nullptr_type_node) = 1;
3677 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3678 SET_TYPE_MODE (nullptr_type_node, ptr_mode);
3679 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3680 nullptr_node = build_int_cst (nullptr_type_node, 0);
3684 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3686 /* Perform other language dependent initializations. */
3687 init_class_processing ();
3688 init_rtti_processing ();
3689 init_template_processing ();
3691 if (flag_exceptions)
3692 init_exception_processing ();
3694 if (! supports_one_only ())
3697 make_fname_decl = cp_make_fname_decl;
3698 start_fname_decls ();
3700 /* Show we use EH for cleanups. */
3701 if (flag_exceptions)
3702 using_eh_for_cleanups ();
3705 /* Generate an initializer for a function naming variable from
3706 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3707 filled in with the type of the init. */
3710 cp_fname_init (const char* name, tree *type_p)
3712 tree domain = NULL_TREE;
3714 tree init = NULL_TREE;
3719 length = strlen (name);
3720 domain = build_index_type (size_int (length));
3721 init = build_string (length + 1, name);
3724 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3725 type = build_cplus_array_type (type, domain);
3730 TREE_TYPE (init) = type;
3732 init = error_mark_node;
3737 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3738 the decl, LOC is the location to give the decl, NAME is the
3739 initialization string and TYPE_DEP indicates whether NAME depended
3740 on the type of the function. We make use of that to detect
3741 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3742 at the point of first use, so we mustn't push the decl now. */
3745 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3747 const char *const name = (type_dep && processing_template_decl
3748 ? NULL : fname_as_string (type_dep));
3750 tree init = cp_fname_init (name, &type);
3751 tree decl = build_decl (loc, VAR_DECL, id, type);
3754 free (CONST_CAST (char *, name));
3756 /* As we're using pushdecl_with_scope, we must set the context. */
3757 DECL_CONTEXT (decl) = current_function_decl;
3758 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3760 TREE_STATIC (decl) = 1;
3761 TREE_READONLY (decl) = 1;
3762 DECL_ARTIFICIAL (decl) = 1;
3764 TREE_USED (decl) = 1;
3766 if (current_function_decl)
3768 cp_binding_level *b = current_binding_level;
3769 if (b->kind == sk_function_parms)
3770 return error_mark_node;
3771 while (b->level_chain->kind != sk_function_parms)
3773 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3774 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3775 LOOKUP_ONLYCONVERTING);
3779 DECL_THIS_STATIC (decl) = true;
3780 pushdecl_top_level_and_finish (decl, init);
3787 builtin_function_1 (tree decl, tree context, bool is_global)
3789 tree id = DECL_NAME (decl);
3790 const char *name = IDENTIFIER_POINTER (id);
3792 retrofit_lang_decl (decl);
3794 DECL_ARTIFICIAL (decl) = 1;
3795 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3796 SET_DECL_LANGUAGE (decl, lang_c);
3797 /* Runtime library routines are, by definition, available in an
3798 external shared object. */
3799 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3800 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3802 DECL_CONTEXT (decl) = context;
3805 pushdecl_top_level (decl);
3809 /* A function in the user's namespace should have an explicit
3810 declaration before it is used. Mark the built-in function as
3811 anticipated but not actually declared. */
3812 if (name[0] != '_' || name[1] != '_')
3813 DECL_ANTICIPATED (decl) = 1;
3814 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3816 size_t len = strlen (name);
3818 /* Treat __*_chk fortification functions as anticipated as well,
3819 unless they are __builtin_*. */
3820 if (len > strlen ("___chk")
3821 && memcmp (name + len - strlen ("_chk"),
3822 "_chk", strlen ("_chk") + 1) == 0)
3823 DECL_ANTICIPATED (decl) = 1;
3830 cxx_builtin_function (tree decl)
3832 tree id = DECL_NAME (decl);
3833 const char *name = IDENTIFIER_POINTER (id);
3834 /* All builtins that don't begin with an '_' should additionally
3835 go in the 'std' namespace. */
3838 tree decl2 = copy_node(decl);
3839 push_namespace (std_identifier);
3840 builtin_function_1 (decl2, std_node, false);
3844 return builtin_function_1 (decl, NULL_TREE, false);
3847 /* Like cxx_builtin_function, but guarantee the function is added to the global
3848 scope. This is to allow function specific options to add new machine
3849 dependent builtins when the target ISA changes via attribute((target(...)))
3850 which saves space on program startup if the program does not use non-generic
3854 cxx_builtin_function_ext_scope (tree decl)
3857 tree id = DECL_NAME (decl);
3858 const char *name = IDENTIFIER_POINTER (id);
3859 /* All builtins that don't begin with an '_' should additionally
3860 go in the 'std' namespace. */
3863 tree decl2 = copy_node(decl);
3864 push_namespace (std_identifier);
3865 builtin_function_1 (decl2, std_node, true);
3869 return builtin_function_1 (decl, NULL_TREE, true);
3872 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3873 function. Not called directly. */
3876 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3878 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3879 DECL_EXTERNAL (fn) = 1;
3880 TREE_PUBLIC (fn) = 1;
3881 DECL_ARTIFICIAL (fn) = 1;
3882 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3883 SET_DECL_LANGUAGE (fn, lang_c);
3884 /* Runtime library routines are, by definition, available in an
3885 external shared object. */
3886 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3887 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3891 /* Returns the _DECL for a library function with C linkage.
3892 We assume that such functions never throw; if this is incorrect,
3893 callers should unset TREE_NOTHROW. */
3896 build_library_fn (tree name, tree type)
3898 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3899 TREE_NOTHROW (fn) = 1;
3903 /* Returns the _DECL for a library function with C++ linkage. */
3906 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3908 tree fn = build_library_fn_1 (name, operator_code, type);
3909 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3910 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3911 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3915 /* Like build_library_fn, but takes a C string instead of an
3919 build_library_fn_ptr (const char* name, tree type)
3921 return build_library_fn (get_identifier (name), type);
3924 /* Like build_cp_library_fn, but takes a C string instead of an
3928 build_cp_library_fn_ptr (const char* name, tree type)
3930 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3933 /* Like build_library_fn, but also pushes the function so that we will
3934 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3935 may throw exceptions listed in RAISES. */
3938 push_library_fn (tree name, tree type, tree raises)
3943 type = build_exception_variant (type, raises);
3945 fn = build_library_fn (name, type);
3946 pushdecl_top_level (fn);
3950 /* Like build_cp_library_fn, but also pushes the function so that it
3951 will be found by normal lookup. */
3954 push_cp_library_fn (enum tree_code operator_code, tree type)
3956 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3963 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3967 push_void_library_fn (tree name, tree parmtypes)
3969 tree type = build_function_type (void_type_node, parmtypes);
3970 return push_library_fn (name, type, NULL_TREE);
3973 /* Like push_library_fn, but also note that this function throws
3974 and does not return. Used for __throw_foo and the like. */
3977 push_throw_library_fn (tree name, tree type)
3979 tree fn = push_library_fn (name, type, NULL_TREE);
3980 TREE_THIS_VOLATILE (fn) = 1;
3981 TREE_NOTHROW (fn) = 0;
3985 /* When we call finish_struct for an anonymous union, we create
3986 default copy constructors and such. But, an anonymous union
3987 shouldn't have such things; this function undoes the damage to the
3988 anonymous union type T.
3990 (The reason that we create the synthesized methods is that we don't
3991 distinguish `union { int i; }' from `typedef union { int i; } U'.
3992 The first is an anonymous union; the second is just an ordinary
3996 fixup_anonymous_aggr (tree t)
4000 /* Wipe out memory of synthesized methods. */
4001 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
4002 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
4003 TYPE_HAS_COPY_CTOR (t) = 0;
4004 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
4005 TYPE_HAS_COPY_ASSIGN (t) = 0;
4006 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
4008 /* Splice the implicitly generated functions out of the TYPE_METHODS
4010 q = &TYPE_METHODS (t);
4013 if (DECL_ARTIFICIAL (*q))
4014 *q = TREE_CHAIN (*q);
4016 q = &DECL_CHAIN (*q);
4019 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4020 if (TYPE_METHODS (t))
4022 tree decl = TYPE_MAIN_DECL (t);
4024 if (TREE_CODE (t) != UNION_TYPE)
4025 error_at (DECL_SOURCE_LOCATION (decl),
4026 "an anonymous struct cannot have function members");
4028 error_at (DECL_SOURCE_LOCATION (decl),
4029 "an anonymous union cannot have function members");
4032 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4033 assignment operators (because they cannot have these methods themselves).
4034 For anonymous unions this is already checked because they are not allowed
4035 in any union, otherwise we have to check it. */
4036 if (TREE_CODE (t) != UNION_TYPE)
4040 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
4041 if (TREE_CODE (field) == FIELD_DECL)
4043 type = TREE_TYPE (field);
4044 if (CLASS_TYPE_P (type))
4046 if (TYPE_NEEDS_CONSTRUCTING (type))
4047 error ("member %q+#D with constructor not allowed "
4048 "in anonymous aggregate", field);
4049 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
4050 error ("member %q+#D with destructor not allowed "
4051 "in anonymous aggregate", field);
4052 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
4053 error ("member %q+#D with copy assignment operator "
4054 "not allowed in anonymous aggregate", field);
4060 /* Make sure that a declaration with no declarator is well-formed, i.e.
4061 just declares a tagged type or anonymous union.
4063 Returns the type declared; or NULL_TREE if none. */
4066 check_tag_decl (cp_decl_specifier_seq *declspecs)
4068 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4069 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4070 /* If a class, struct, or enum type is declared by the DECLSPECS
4071 (i.e, if a class-specifier, enum-specifier, or non-typename
4072 elaborated-type-specifier appears in the DECLSPECS),
4073 DECLARED_TYPE is set to the corresponding type. */
4074 tree declared_type = NULL_TREE;
4075 bool error_p = false;
4077 if (declspecs->multiple_types_p)
4078 error ("multiple types in one declaration");
4079 else if (declspecs->redefined_builtin_type)
4081 if (!in_system_header)
4082 permerror (input_location, "redeclaration of C++ built-in type %qT",
4083 declspecs->redefined_builtin_type);
4088 && TYPE_P (declspecs->type)
4089 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4090 && MAYBE_CLASS_TYPE_P (declspecs->type))
4091 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4092 declared_type = declspecs->type;
4093 else if (declspecs->type == error_mark_node)
4095 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4096 permerror (input_location, "declaration does not declare anything");
4097 /* Check for an anonymous union. */
4098 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4099 && TYPE_ANONYMOUS_P (declared_type))
4101 /* 7/3 In a simple-declaration, the optional init-declarator-list
4102 can be omitted only when declaring a class (clause 9) or
4103 enumeration (7.2), that is, when the decl-specifier-seq contains
4104 either a class-specifier, an elaborated-type-specifier with
4105 a class-key (9.1), or an enum-specifier. In these cases and
4106 whenever a class-specifier or enum-specifier is present in the
4107 decl-specifier-seq, the identifiers in these specifiers are among
4108 the names being declared by the declaration (as class-name,
4109 enum-names, or enumerators, depending on the syntax). In such
4110 cases, and except for the declaration of an unnamed bit-field (9.6),
4111 the decl-specifier-seq shall introduce one or more names into the
4112 program, or shall redeclare a name introduced by a previous
4113 declaration. [Example:
4114 enum { }; // ill-formed
4115 typedef class { }; // ill-formed
4119 error ("missing type-name in typedef-declaration");
4122 /* Anonymous unions are objects, so they can have specifiers. */;
4123 SET_ANON_AGGR_TYPE_P (declared_type);
4125 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4126 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4131 if (declspecs->specs[(int)ds_inline]
4132 || declspecs->specs[(int)ds_virtual])
4133 error ("%qs can only be specified for functions",
4134 declspecs->specs[(int)ds_inline]
4135 ? "inline" : "virtual");
4137 && (!current_class_type
4138 || current_scope () != current_class_type))
4139 error ("%<friend%> can only be specified inside a class");
4140 else if (declspecs->specs[(int)ds_explicit])
4141 error ("%<explicit%> can only be specified for constructors");
4142 else if (declspecs->storage_class)
4143 error ("a storage class can only be specified for objects "
4145 else if (declspecs->specs[(int)ds_const]
4146 || declspecs->specs[(int)ds_volatile]
4147 || declspecs->specs[(int)ds_restrict]
4148 || declspecs->specs[(int)ds_thread])
4149 error ("qualifiers can only be specified for objects "
4151 else if (saw_typedef)
4152 warning (0, "%<typedef%> was ignored in this declaration");
4153 else if (declspecs->specs[(int) ds_constexpr])
4154 error ("%<constexpr%> cannot be used for type declarations");
4157 return declared_type;
4160 /* Called when a declaration is seen that contains no names to declare.
4161 If its type is a reference to a structure, union or enum inherited
4162 from a containing scope, shadow that tag name for the current scope
4163 with a forward reference.
4164 If its type defines a new named structure or union
4165 or defines an enum, it is valid but we need not do anything here.
4166 Otherwise, it is an error.
4168 C++: may have to grok the declspecs to learn about static,
4169 complain for anonymous unions.
4171 Returns the TYPE declared -- or NULL_TREE if none. */
4174 shadow_tag (cp_decl_specifier_seq *declspecs)
4176 tree t = check_tag_decl (declspecs);
4181 if (declspecs->attributes)
4183 warning (0, "attribute ignored in declaration of %q+#T", t);
4184 warning (0, "attribute for %q+#T must follow the %qs keyword",
4185 t, class_key_or_enum_as_string (t));
4189 if (maybe_process_partial_specialization (t) == error_mark_node)
4192 /* This is where the variables in an anonymous union are
4193 declared. An anonymous union declaration looks like:
4195 because there is no declarator after the union, the parser
4196 sends that declaration here. */
4197 if (ANON_AGGR_TYPE_P (t))
4199 fixup_anonymous_aggr (t);
4201 if (TYPE_FIELDS (t))
4203 tree decl = grokdeclarator (/*declarator=*/NULL,
4204 declspecs, NORMAL, 0, NULL);
4205 finish_anon_union (decl);
4212 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4215 groktypename (cp_decl_specifier_seq *type_specifiers,
4216 const cp_declarator *declarator,
4217 bool is_template_arg)
4221 enum decl_context context
4222 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4223 attrs = type_specifiers->attributes;
4224 type_specifiers->attributes = NULL_TREE;
4225 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4226 if (attrs && type != error_mark_node)
4228 if (CLASS_TYPE_P (type))
4229 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4230 "outside of definition", type);
4231 else if (MAYBE_CLASS_TYPE_P (type))
4232 /* A template type parameter or other dependent type. */
4233 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4234 "type %qT without an associated declaration", type);
4236 cplus_decl_attributes (&type, attrs, 0);
4241 /* Process a DECLARATOR for a function-scope variable declaration,
4242 namespace-scope variable declaration, or function declaration.
4243 (Function definitions go through start_function; class member
4244 declarations appearing in the body of the class go through
4245 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4246 If an error occurs, the error_mark_node is returned instead.
4248 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4249 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4250 for an explicitly defaulted function, or SD_DELETED for an explicitly
4251 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4252 implicitly initialized via a default constructor. ATTRIBUTES and
4253 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4254 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4255 set, the caller is responsible for calling pop_scope. */
4258 start_decl (const cp_declarator *declarator,
4259 cp_decl_specifier_seq *declspecs,
4262 tree prefix_attributes,
4263 tree *pushed_scope_p)
4271 *pushed_scope_p = NULL_TREE;
4273 /* An object declared as __attribute__((deprecated)) suppresses
4274 warnings of uses of other deprecated items. */
4275 if (lookup_attribute ("deprecated", attributes))
4276 deprecated_state = DEPRECATED_SUPPRESS;
4278 attributes = chainon (attributes, prefix_attributes);
4280 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4283 deprecated_state = DEPRECATED_NORMAL;
4285 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4286 || decl == error_mark_node)
4287 return error_mark_node;
4289 context = CP_DECL_CONTEXT (decl);
4290 if (context != global_namespace)
4291 *pushed_scope_p = push_scope (context);
4294 /* Is it valid for this decl to have an initializer at all?
4295 If not, set INITIALIZED to zero, which will indirectly
4296 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4297 switch (TREE_CODE (decl))
4300 error ("typedef %qD is initialized (use decltype instead)", decl);
4301 return error_mark_node;
4304 if (initialized == SD_DELETED)
4305 /* We'll handle the rest of the semantics later, but we need to
4306 set this now so it's visible to duplicate_decls. */
4307 DECL_DELETED_FN (decl) = 1;
4316 if (! toplevel_bindings_p ()
4317 && DECL_EXTERNAL (decl))
4318 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4320 DECL_EXTERNAL (decl) = 0;
4321 if (toplevel_bindings_p ())
4322 TREE_STATIC (decl) = 1;
4324 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4326 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4327 record_key_method_defined (decl);
4329 /* If this is a typedef that names the class for linkage purposes
4330 (7.1.3p8), apply any attributes directly to the type. */
4331 if (TREE_CODE (decl) == TYPE_DECL
4332 && TAGGED_TYPE_P (TREE_TYPE (decl))
4333 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4334 flags = ATTR_FLAG_TYPE_IN_PLACE;
4338 /* Set attributes here so if duplicate decl, will have proper attributes. */
4339 cplus_decl_attributes (&decl, attributes, flags);
4341 /* Dllimported symbols cannot be defined. Static data members (which
4342 can be initialized in-class and dllimported) go through grokfield,
4343 not here, so we don't need to exclude those decls when checking for
4345 if (initialized && DECL_DLLIMPORT_P (decl))
4347 error ("definition of %q#D is marked %<dllimport%>", decl);
4348 DECL_DLLIMPORT_P (decl) = 0;
4351 /* If #pragma weak was used, mark the decl weak now. */
4352 maybe_apply_pragma_weak (decl);
4354 if (TREE_CODE (decl) == FUNCTION_DECL
4355 && DECL_DECLARED_INLINE_P (decl)
4356 && DECL_UNINLINABLE (decl)
4357 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4358 warning (0, "inline function %q+D given attribute noinline", decl);
4360 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4362 if (TREE_CODE (decl) == VAR_DECL)
4364 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4365 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4366 error ("%q#D is not a static member of %q#T", decl, context);
4369 if (DECL_CONTEXT (field) != context)
4371 if (!same_type_p (DECL_CONTEXT (field), context))
4372 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4373 "to be defined as %<%T::%D%>",
4374 DECL_CONTEXT (field), DECL_NAME (decl),
4375 context, DECL_NAME (decl));
4376 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4378 if (processing_specialization
4379 && template_class_depth (context) == 0
4380 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4381 error ("template header not allowed in member definition "
4382 "of explicitly specialized class");
4383 /* Static data member are tricky; an in-class initialization
4384 still doesn't provide a definition, so the in-class
4385 declaration will have DECL_EXTERNAL set, but will have an
4386 initialization. Thus, duplicate_decls won't warn
4387 about this situation, and so we check here. */
4388 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4389 error ("duplicate initialization of %qD", decl);
4390 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4392 if (declspecs->specs[(int) ds_constexpr]
4393 && !DECL_DECLARED_CONSTEXPR_P (field))
4394 error ("%qD declared %<constexpr%> outside its class", field);
4399 tree field = check_classfn (context, decl,
4400 (processing_template_decl
4401 > template_class_depth (context))
4402 ? current_template_parms
4404 if (field && field != error_mark_node
4405 && duplicate_decls (decl, field,
4406 /*newdecl_is_friend=*/false))
4410 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4411 DECL_IN_AGGR_P (decl) = 0;
4412 /* Do not mark DECL as an explicit specialization if it was not
4413 already marked as an instantiation; a declaration should
4414 never be marked as a specialization unless we know what
4415 template is being specialized. */
4416 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4418 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4420 /* [temp.expl.spec] An explicit specialization of a static data
4421 member of a template is a definition if the declaration
4422 includes an initializer; otherwise, it is a declaration.
4424 We check for processing_specialization so this only applies
4425 to the new specialization syntax. */
4426 if (!initialized && processing_specialization)
4427 DECL_EXTERNAL (decl) = 1;
4430 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4431 /* Aliases are definitions. */
4433 permerror (input_location, "declaration of %q#D outside of class is not definition",
4437 was_public = TREE_PUBLIC (decl);
4439 /* Enter this declaration into the symbol table. */
4440 decl = maybe_push_decl (decl);
4442 if (processing_template_decl)
4443 decl = push_template_decl (decl);
4444 if (decl == error_mark_node)
4445 return error_mark_node;
4447 /* Tell the back end to use or not use .common as appropriate. If we say
4448 -fconserve-space, we want this to save .data space, at the expense of
4449 wrong semantics. If we say -fno-conserve-space, we want this to
4450 produce errors about redefs; to do this we force variables into the
4452 if (flag_conserve_space
4453 && TREE_CODE (decl) == VAR_DECL
4454 && TREE_PUBLIC (decl)
4455 && !DECL_THREAD_LOCAL_P (decl)
4456 && !have_global_bss_p ())
4457 DECL_COMMON (decl) = 1;
4459 if (TREE_CODE (decl) == VAR_DECL
4460 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4461 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4463 /* This is a const variable with implicit 'static'. Set
4464 DECL_THIS_STATIC so we can tell it from variables that are
4465 !TREE_PUBLIC because of the anonymous namespace. */
4466 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4467 DECL_THIS_STATIC (decl) = 1;
4470 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4471 start_decl_1 (decl, initialized);
4476 /* Process the declaration of a variable DECL. INITIALIZED is true
4477 iff DECL is explicitly initialized. (INITIALIZED is false if the
4478 variable is initialized via an implicitly-called constructor.)
4479 This function must be called for ordinary variables (including, for
4480 example, implicit instantiations of templates), but must not be
4481 called for template declarations. */
4484 start_decl_1 (tree decl, bool initialized)
4488 bool aggregate_definition_p;
4490 gcc_assert (!processing_template_decl);
4492 if (error_operand_p (decl))
4495 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4497 type = TREE_TYPE (decl);
4498 complete_p = COMPLETE_TYPE_P (type);
4499 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4501 /* If an explicit initializer is present, or if this is a definition
4502 of an aggregate, then we need a complete type at this point.
4503 (Scalars are always complete types, so there is nothing to
4504 check.) This code just sets COMPLETE_P; errors (if necessary)
4505 are issued below. */
4506 if ((initialized || aggregate_definition_p)
4508 && COMPLETE_TYPE_P (complete_type (type)))
4511 /* We will not yet have set TREE_READONLY on DECL if the type
4512 was "const", but incomplete, before this point. But, now, we
4513 have a complete type, so we can try again. */
4514 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4518 /* Is it valid for this decl to have an initializer at all? */
4520 /* Don't allow initializations for incomplete types except for
4521 arrays which might be completed by the initialization. */
4523 ; /* A complete type is ok. */
4524 else if (type_uses_auto (type))
4525 ; /* An auto type is ok. */
4526 else if (TREE_CODE (type) != ARRAY_TYPE)
4528 error ("variable %q#D has initializer but incomplete type", decl);
4529 type = TREE_TYPE (decl) = error_mark_node;
4531 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4533 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4534 error ("elements of array %q#D have incomplete type", decl);
4535 /* else we already gave an error in start_decl. */
4538 else if (aggregate_definition_p && !complete_p)
4540 if (type_uses_auto (type))
4541 error ("declaration of %q#D has no initializer", decl);
4543 error ("aggregate %q#D has incomplete type and cannot be defined",
4545 /* Change the type so that assemble_variable will give
4546 DECL an rtl we can live with: (mem (const_int 0)). */
4547 type = TREE_TYPE (decl) = error_mark_node;
4550 /* Create a new scope to hold this declaration if necessary.
4551 Whether or not a new scope is necessary cannot be determined
4552 until after the type has been completed; if the type is a
4553 specialization of a class template it is not until after
4554 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4555 will be set correctly. */
4556 maybe_push_cleanup_level (type);
4559 /* Handle initialization of references. DECL, TYPE, and INIT have the
4560 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4561 but will be set to a new CLEANUP_STMT if a temporary is created
4562 that must be destroyed subsequently.
4564 Returns an initializer expression to use to initialize DECL, or
4565 NULL if the initialization can be performed statically.
4567 Quotes on semantics can be found in ARM 8.4.3. */
4570 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4574 if (init == NULL_TREE)
4576 if ((DECL_LANG_SPECIFIC (decl) == 0
4577 || DECL_IN_AGGR_P (decl) == 0)
4578 && ! DECL_THIS_EXTERN (decl))
4579 error ("%qD declared as reference but not initialized", decl);
4583 if (TREE_CODE (init) == TREE_LIST)
4584 init = build_x_compound_expr_from_list (init, ELK_INIT,
4585 tf_warning_or_error);
4587 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4588 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4589 /* Note: default conversion is only called in very special cases. */
4590 init = decay_conversion (init);
4592 /* Convert INIT to the reference type TYPE. This may involve the
4593 creation of a temporary, whose lifetime must be the same as that
4594 of the reference. If so, a DECL_EXPR for the temporary will be
4595 added just after the DECL_EXPR for DECL. That's why we don't set
4596 DECL_INITIAL for local references (instead assigning to them
4597 explicitly); we need to allow the temporary to be initialized
4599 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4601 if (tmp == error_mark_node)
4603 else if (tmp == NULL_TREE)
4605 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4609 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4612 DECL_INITIAL (decl) = tmp;
4617 /* Subroutine of check_initializer. We're initializing a DECL of
4618 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4619 extend the lifetime of the underlying array to match that of the decl,
4620 just like for reference initialization. CLEANUP is as for
4621 grok_reference_init. */
4624 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4627 tree aggr_init, array, arrtype;
4628 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4629 if (error_operand_p (init))
4630 return error_mark_node;
4632 aggr_init = TARGET_EXPR_INITIAL (init);
4633 array = CONSTRUCTOR_ELT (aggr_init, 0)->value;
4634 arrtype = TREE_TYPE (array);
4636 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4637 array = TREE_OPERAND (array, 0);
4638 /* If the array is constant, finish_compound_literal already made it a
4639 static variable and we don't need to do anything here. */
4640 if (decl && TREE_CODE (array) == TARGET_EXPR)
4642 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4643 var = build_address (var);
4644 var = convert (arrtype, var);
4645 CONSTRUCTOR_ELT (aggr_init, 0)->value = var;
4650 /* Designated initializers in arrays are not supported in GNU C++.
4651 The parser cannot detect this error since it does not know whether
4652 a given brace-enclosed initializer is for a class type or for an
4653 array. This function checks that CE does not use a designated
4654 initializer. If it does, an error is issued. Returns true if CE
4655 is valid, i.e., does not have a designated initializer. */
4658 check_array_designated_initializer (const constructor_elt *ce,
4659 unsigned HOST_WIDE_INT index)
4661 /* Designated initializers for array elements are not supported. */
4664 /* The parser only allows identifiers as designated
4666 if (ce->index == error_mark_node)
4667 error ("name used in a GNU-style designated "
4668 "initializer for an array");
4669 else if (TREE_CODE (ce->index) == INTEGER_CST)
4671 /* A C99 designator is OK if it matches the current index. */
4672 if (TREE_INT_CST_LOW (ce->index) == index)
4675 sorry ("non-trivial designated initializers not supported");
4679 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4680 error ("name %qD used in a GNU-style designated "
4681 "initializer for an array", ce->index);
4689 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4690 array until we finish parsing the initializer. If that's the
4691 situation we're in, update DECL accordingly. */
4694 maybe_deduce_size_from_array_init (tree decl, tree init)
4696 tree type = TREE_TYPE (decl);
4698 if (TREE_CODE (type) == ARRAY_TYPE
4699 && TYPE_DOMAIN (type) == NULL_TREE
4700 && TREE_CODE (decl) != TYPE_DECL)
4702 /* do_default is really a C-ism to deal with tentative definitions.
4703 But let's leave it here to ease the eventual merge. */
4704 int do_default = !DECL_EXTERNAL (decl);
4705 tree initializer = init ? init : DECL_INITIAL (decl);
4708 /* Check that there are no designated initializers in INIT, as
4709 those are not supported in GNU C++, and as the middle-end
4710 will crash if presented with a non-numeric designated
4712 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4714 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4715 constructor_elt *ce;
4717 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4718 if (!check_array_designated_initializer (ce, i))
4724 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4728 error ("initializer fails to determine size of %qD", decl);
4729 TREE_TYPE (decl) = error_mark_node;
4731 else if (failure == 2)
4735 error ("array size missing in %qD", decl);
4736 TREE_TYPE (decl) = error_mark_node;
4738 /* If a `static' var's size isn't known, make it extern as
4739 well as static, so it does not get allocated. If it's not
4740 `static', then don't mark it extern; finish_incomplete_decl
4741 will give it a default size and it will get allocated. */
4742 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4743 DECL_EXTERNAL (decl) = 1;
4745 else if (failure == 3)
4747 error ("zero-size array %qD", decl);
4748 TREE_TYPE (decl) = error_mark_node;
4752 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4754 relayout_decl (decl);
4758 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4759 any appropriate error messages regarding the layout. */
4762 layout_var_decl (tree decl)
4766 type = TREE_TYPE (decl);
4767 if (type == error_mark_node)
4770 /* If we haven't already layed out this declaration, do so now.
4771 Note that we must not call complete type for an external object
4772 because it's type might involve templates that we are not
4773 supposed to instantiate yet. (And it's perfectly valid to say
4774 `extern X x' for some incomplete type `X'.) */
4775 if (!DECL_EXTERNAL (decl))
4776 complete_type (type);
4777 if (!DECL_SIZE (decl)
4778 && TREE_TYPE (decl) != error_mark_node
4779 && (COMPLETE_TYPE_P (type)
4780 || (TREE_CODE (type) == ARRAY_TYPE
4781 && !TYPE_DOMAIN (type)
4782 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4783 layout_decl (decl, 0);
4785 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4787 /* An automatic variable with an incomplete type: that is an error.
4788 Don't talk about array types here, since we took care of that
4789 message in grokdeclarator. */
4790 error ("storage size of %qD isn%'t known", decl);
4791 TREE_TYPE (decl) = error_mark_node;
4794 /* Keep this code around in case we later want to control debug info
4795 based on whether a type is "used". (jason 1999-11-11) */
4797 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4798 /* Let debugger know it should output info for this type. */
4799 note_debug_info_needed (ttype);
4801 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4802 note_debug_info_needed (DECL_CONTEXT (decl));
4805 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4806 && DECL_SIZE (decl) != NULL_TREE
4807 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4809 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4810 constant_expression_warning (DECL_SIZE (decl));
4813 error ("storage size of %qD isn%'t constant", decl);
4814 TREE_TYPE (decl) = error_mark_node;
4819 /* If a local static variable is declared in an inline function, or if
4820 we have a weak definition, we must endeavor to create only one
4821 instance of the variable at link-time. */
4824 maybe_commonize_var (tree decl)
4826 /* Static data in a function with comdat linkage also has comdat
4828 if (TREE_STATIC (decl)
4829 /* Don't mess with __FUNCTION__. */
4830 && ! DECL_ARTIFICIAL (decl)
4831 && DECL_FUNCTION_SCOPE_P (decl)
4832 && vague_linkage_p (DECL_CONTEXT (decl)))
4836 /* With weak symbols, we simply make the variable COMDAT;
4837 that will cause copies in multiple translations units to
4839 comdat_linkage (decl);
4843 if (DECL_INITIAL (decl) == NULL_TREE
4844 || DECL_INITIAL (decl) == error_mark_node)
4846 /* Without weak symbols, we can use COMMON to merge
4847 uninitialized variables. */
4848 TREE_PUBLIC (decl) = 1;
4849 DECL_COMMON (decl) = 1;
4853 /* While for initialized variables, we must use internal
4854 linkage -- which means that multiple copies will not
4856 TREE_PUBLIC (decl) = 0;
4857 DECL_COMMON (decl) = 0;
4858 warning_at (input_location, 0,
4859 "sorry: semantics of inline function static "
4860 "data %q+#D are wrong (you%'ll wind up "
4861 "with multiple copies)", decl);
4862 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4863 " you can work around this by removing "
4868 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4869 /* Set it up again; we might have set DECL_INITIAL since the last
4871 comdat_linkage (decl);
4874 /* Issue an error message if DECL is an uninitialized const variable. */
4877 check_for_uninitialized_const_var (tree decl)
4879 tree type = strip_array_types (TREE_TYPE (decl));
4881 /* ``Unless explicitly declared extern, a const object does not have
4882 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4884 if (TREE_CODE (decl) == VAR_DECL
4885 && TREE_CODE (type) != REFERENCE_TYPE
4886 && CP_TYPE_CONST_P (type)
4887 && (!TYPE_NEEDS_CONSTRUCTING (type)
4888 || !type_has_user_provided_default_constructor (type))
4889 && !DECL_INITIAL (decl))
4891 permerror (DECL_SOURCE_LOCATION (decl),
4892 "uninitialized const %qD", decl);
4894 if (CLASS_TYPE_P (type)
4895 && !type_has_user_provided_default_constructor (type))
4897 tree defaulted_ctor;
4899 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4900 "%q#T has no user-provided default constructor", type);
4901 defaulted_ctor = in_class_defaulted_default_constructor (type);
4903 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4904 "constructor is not user-provided because it is "
4905 "explicitly defaulted in the class body");
4910 /* Structure holding the current initializer being processed by reshape_init.
4911 CUR is a pointer to the current element being processed, END is a pointer
4912 after the last element present in the initializer. */
4913 typedef struct reshape_iterator_t
4915 constructor_elt *cur;
4916 constructor_elt *end;
4919 static tree reshape_init_r (tree, reshape_iter *, bool, tsubst_flags_t);
4921 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4922 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4923 initialized. If there are no more such fields, the return value
4927 next_initializable_field (tree field)
4930 && (TREE_CODE (field) != FIELD_DECL
4931 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4932 || DECL_ARTIFICIAL (field)))
4933 field = DECL_CHAIN (field);
4938 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4939 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4940 INTEGER_CST representing the size of the array minus one (the maximum index),
4941 or NULL_TREE if the array was declared without specifying the size. D is
4942 the iterator within the constructor. */
4945 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
4946 tsubst_flags_t complain)
4949 bool sized_array_p = (max_index != NULL_TREE);
4950 unsigned HOST_WIDE_INT max_index_cst = 0;
4951 unsigned HOST_WIDE_INT index;
4953 /* The initializer for an array is always a CONSTRUCTOR. */
4954 new_init = build_constructor (init_list_type_node, NULL);
4958 /* Minus 1 is used for zero sized arrays. */
4959 if (integer_all_onesp (max_index))
4962 if (host_integerp (max_index, 1))
4963 max_index_cst = tree_low_cst (max_index, 1);
4964 /* sizetype is sign extended, not zero extended. */
4966 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4970 /* Loop until there are no more initializers. */
4972 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4977 check_array_designated_initializer (d->cur, index);
4978 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false,
4980 if (elt_init == error_mark_node)
4981 return error_mark_node;
4982 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4983 size_int (index), elt_init);
4984 if (!TREE_CONSTANT (elt_init))
4985 TREE_CONSTANT (new_init) = false;
4991 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4992 Parameters are the same of reshape_init_r. */
4995 reshape_init_array (tree type, reshape_iter *d, tsubst_flags_t complain)
4997 tree max_index = NULL_TREE;
4999 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
5001 if (TYPE_DOMAIN (type))
5002 max_index = array_type_nelts (type);
5004 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5007 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5008 Parameters are the same of reshape_init_r. */
5011 reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
5013 tree max_index = NULL_TREE;
5015 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
5017 if (COMPOUND_LITERAL_P (d->cur->value))
5019 tree value = d->cur->value;
5020 if (!same_type_p (TREE_TYPE (value), type))
5022 if (complain & tf_error)
5023 error ("invalid type %qT as initializer for a vector of type %qT",
5024 TREE_TYPE (d->cur->value), type);
5025 value = error_mark_node;
5031 /* For a vector, we initialize it as an array of the appropriate size. */
5032 if (TREE_CODE (type) == VECTOR_TYPE)
5033 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
5035 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5038 /* Subroutine of reshape_init_r, processes the initializers for classes
5039 or union. Parameters are the same of reshape_init_r. */
5042 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
5043 tsubst_flags_t complain)
5048 gcc_assert (CLASS_TYPE_P (type));
5050 /* The initializer for a class is always a CONSTRUCTOR. */
5051 new_init = build_constructor (init_list_type_node, NULL);
5052 field = next_initializable_field (TYPE_FIELDS (type));
5058 An initializer for an aggregate member that is an
5059 empty class shall have the form of an empty
5060 initializer-list {}. */
5061 if (!first_initializer_p)
5063 if (complain & tf_error)
5064 error ("initializer for %qT must be brace-enclosed", type);
5065 return error_mark_node;
5070 /* Loop through the initializable fields, gathering initializers. */
5071 while (d->cur != d->end)
5075 /* Handle designated initializers, as an extension. */
5078 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5080 if (!field || TREE_CODE (field) != FIELD_DECL)
5082 if (complain & tf_error)
5083 error ("%qT has no non-static data member named %qD", type,
5085 return error_mark_node;
5089 /* If we processed all the member of the class, we are done. */
5093 field_init = reshape_init_r (TREE_TYPE (field), d,
5094 /*first_initializer_p=*/false, complain);
5095 if (field_init == error_mark_node)
5096 return error_mark_node;
5098 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5102 When a union is initialized with a brace-enclosed
5103 initializer, the braces shall only contain an
5104 initializer for the first member of the union. */
5105 if (TREE_CODE (type) == UNION_TYPE)
5108 field = next_initializable_field (DECL_CHAIN (field));
5114 /* Subroutine of reshape_init, which processes a single initializer (part of
5115 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5116 iterator within the CONSTRUCTOR which points to the initializer to process.
5117 FIRST_INITIALIZER_P is true if this is the first initializer of the
5118 outermost CONSTRUCTOR node. */
5121 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p,
5122 tsubst_flags_t complain)
5124 tree init = d->cur->value;
5126 if (error_operand_p (init))
5127 return error_mark_node;
5129 if (TREE_CODE (type) == COMPLEX_TYPE)
5131 /* A complex type can be initialized from one or two initializers,
5132 but braces are not elided. */
5134 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5136 if (CONSTRUCTOR_NELTS (init) > 2)
5138 if (complain & tf_error)
5139 error ("too many initializers for %qT", type);
5141 return error_mark_node;
5144 else if (first_initializer_p && d->cur != d->end)
5146 VEC(constructor_elt, gc) *v = 0;
5147 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5148 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5150 init = build_constructor (init_list_type_node, v);
5155 /* A non-aggregate type is always initialized with a single
5157 if (!CP_AGGREGATE_TYPE_P (type))
5159 /* It is invalid to initialize a non-aggregate type with a
5160 brace-enclosed initializer before C++0x.
5161 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5162 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5163 a CONSTRUCTOR (with a record type). */
5164 if (TREE_CODE (init) == CONSTRUCTOR
5165 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5167 if (SCALAR_TYPE_P (type))
5169 if (complain & tf_error)
5170 error ("braces around scalar initializer for type %qT", type);
5171 init = error_mark_node;
5174 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5183 All implicit type conversions (clause _conv_) are considered when
5184 initializing the aggregate member with an initializer from an
5185 initializer-list. If the initializer can initialize a member,
5186 the member is initialized. Otherwise, if the member is itself a
5187 non-empty subaggregate, brace elision is assumed and the
5188 initializer is considered for the initialization of the first
5189 member of the subaggregate. */
5190 if (TREE_CODE (init) != CONSTRUCTOR
5191 /* But don't try this for the first initializer, since that would be
5192 looking through the outermost braces; A a2 = { a1 }; is not a
5193 valid aggregate initialization. */
5194 && !first_initializer_p
5195 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5196 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5202 /* [dcl.init.string]
5204 A char array (whether plain char, signed char, or unsigned char)
5205 can be initialized by a string-literal (optionally enclosed in
5206 braces); a wchar_t array can be initialized by a wide
5207 string-literal (optionally enclosed in braces). */
5208 if (TREE_CODE (type) == ARRAY_TYPE
5209 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5211 tree str_init = init;
5213 /* Strip one level of braces if and only if they enclose a single
5214 element (as allowed by [dcl.init.string]). */
5215 if (!first_initializer_p
5216 && TREE_CODE (str_init) == CONSTRUCTOR
5217 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5219 str_init = VEC_index (constructor_elt,
5220 CONSTRUCTOR_ELTS (str_init), 0)->value;
5223 /* If it's a string literal, then it's the initializer for the array
5224 as a whole. Otherwise, continue with normal initialization for
5225 array types (one value per array element). */
5226 if (TREE_CODE (str_init) == STRING_CST)
5233 /* The following cases are about aggregates. If we are not within a full
5234 initializer already, and there is not a CONSTRUCTOR, it means that there
5235 is a missing set of braces (that is, we are processing the case for
5236 which reshape_init exists). */
5237 if (!first_initializer_p)
5239 if (TREE_CODE (init) == CONSTRUCTOR)
5241 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5242 /* There is no need to reshape pointer-to-member function
5243 initializers, as they are always constructed correctly
5244 by the front end. */
5246 else if (COMPOUND_LITERAL_P (init))
5247 /* For a nested compound literal, there is no need to reshape since
5248 brace elision is not allowed. Even if we decided to allow it,
5249 we should add a call to reshape_init in finish_compound_literal,
5250 before calling digest_init, so changing this code would still
5251 not be necessary. */
5252 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5256 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5257 return reshape_init (type, init, complain);
5261 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5265 /* Dispatch to specialized routines. */
5266 if (CLASS_TYPE_P (type))
5267 return reshape_init_class (type, d, first_initializer_p, complain);
5268 else if (TREE_CODE (type) == ARRAY_TYPE)
5269 return reshape_init_array (type, d, complain);
5270 else if (TREE_CODE (type) == VECTOR_TYPE)
5271 return reshape_init_vector (type, d, complain);
5276 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5277 brace-enclosed aggregate initializer.
5279 INIT is the CONSTRUCTOR containing the list of initializers describing
5280 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5281 It may not presently match the shape of the TYPE; for example:
5283 struct S { int a; int b; };
5284 struct S a[] = { 1, 2, 3, 4 };
5286 Here INIT will hold a VEC of four elements, rather than a
5287 VEC of two elements, each itself a VEC of two elements. This
5288 routine transforms INIT from the former form into the latter. The
5289 revised CONSTRUCTOR node is returned. */
5292 reshape_init (tree type, tree init, tsubst_flags_t complain)
5294 VEC(constructor_elt, gc) *v;
5298 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5300 v = CONSTRUCTOR_ELTS (init);
5302 /* An empty constructor does not need reshaping, and it is always a valid
5304 if (VEC_empty (constructor_elt, v))
5307 /* Recurse on this CONSTRUCTOR. */
5308 d.cur = VEC_index (constructor_elt, v, 0);
5309 d.end = d.cur + VEC_length (constructor_elt, v);
5311 new_init = reshape_init_r (type, &d, true, complain);
5312 if (new_init == error_mark_node)
5313 return error_mark_node;
5315 /* Make sure all the element of the constructor were used. Otherwise,
5316 issue an error about exceeding initializers. */
5319 if (complain & tf_error)
5320 error ("too many initializers for %qT", type);
5322 return error_mark_node;
5328 /* Verify array initializer. Returns true if errors have been reported. */
5331 check_array_initializer (tree decl, tree type, tree init)
5333 tree element_type = TREE_TYPE (type);
5335 /* The array type itself need not be complete, because the
5336 initializer may tell us how many elements are in the array.
5337 But, the elements of the array must be complete. */
5338 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5341 error ("elements of array %q#D have incomplete type", decl);
5343 error ("elements of array %q#T have incomplete type", type);
5346 /* It is not valid to initialize a VLA. */
5348 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5349 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5352 error ("variable-sized object %qD may not be initialized", decl);
5354 error ("variable-sized compound literal");
5360 /* Subroutine of check_initializer; args are passed down from that function.
5361 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5364 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5367 int saved_stmts_are_full_exprs_p = 0;
5368 if (building_stmt_list_p ())
5370 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5371 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5373 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5374 if (building_stmt_list_p ())
5375 current_stmt_tree ()->stmts_are_full_exprs_p =
5376 saved_stmts_are_full_exprs_p;
5380 /* Verify INIT (the initializer for DECL), and record the
5381 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5382 grok_reference_init.
5384 If the return value is non-NULL, it is an expression that must be
5385 evaluated dynamically to initialize DECL. */
5388 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5390 tree type = TREE_TYPE (decl);
5391 tree init_code = NULL;
5392 tree extra_init = NULL_TREE;
5395 /* Things that are going to be initialized need to have complete
5397 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5399 if (DECL_HAS_VALUE_EXPR_P (decl))
5401 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5402 it doesn't have storage to be initialized. */
5403 gcc_assert (init == NULL_TREE);
5407 if (type == error_mark_node)
5408 /* We will have already complained. */
5411 if (TREE_CODE (type) == ARRAY_TYPE)
5413 if (check_array_initializer (decl, type, init))
5416 else if (!COMPLETE_TYPE_P (type))
5418 error ("%qD has incomplete type", decl);
5419 TREE_TYPE (decl) = error_mark_node;
5423 /* There is no way to make a variable-sized class type in GNU C++. */
5424 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5426 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5428 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5429 if (SCALAR_TYPE_P (type))
5433 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5434 init = build_zero_init (type, NULL_TREE, false);
5436 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5438 error ("scalar object %qD requires one element in initializer",
5440 TREE_TYPE (decl) = error_mark_node;
5446 if (TREE_CODE (decl) == CONST_DECL)
5448 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5450 DECL_INITIAL (decl) = init;
5452 gcc_assert (init != NULL_TREE);
5455 else if (!init && DECL_REALLY_EXTERN (decl))
5457 else if (TREE_CODE (type) == REFERENCE_TYPE)
5458 init = grok_reference_init (decl, type, init, cleanup);
5459 else if (init || type_build_ctor_call (type))
5462 check_for_uninitialized_const_var (decl);
5463 /* Do not reshape constructors of vectors (they don't need to be
5465 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5467 if (is_std_init_list (type))
5468 init = build_init_list_var_init (decl, type, init,
5469 &extra_init, cleanup);
5470 else if (TYPE_NON_AGGREGATE_CLASS (type))
5472 /* Don't reshape if the class has constructors. */
5473 if (cxx_dialect == cxx98)
5474 error ("in C++98 %qD must be initialized by constructor, "
5478 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5480 error ("opaque vector types cannot be initialized");
5481 init = error_mark_node;
5485 init = reshape_init (type, init, tf_warning_or_error);
5486 if (cxx_dialect >= cxx0x && SCALAR_TYPE_P (type))
5487 check_narrowing (type, init);
5491 /* If DECL has an array type without a specific bound, deduce the
5492 array size from the initializer. */
5493 maybe_deduce_size_from_array_init (decl, init);
5494 type = TREE_TYPE (decl);
5495 if (type == error_mark_node)
5498 if (type_build_ctor_call (type)
5499 || (CLASS_TYPE_P (type)
5500 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5502 init_code = build_aggr_init_full_exprs (decl, init, flags);
5504 /* If this is a constexpr initializer, expand_default_init will
5505 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5506 case, pull the initializer back out and pass it down into
5507 store_init_value. */
5508 while (TREE_CODE (init_code) == EXPR_STMT
5509 || TREE_CODE (init_code) == CONVERT_EXPR)
5510 init_code = TREE_OPERAND (init_code, 0);
5511 if (TREE_CODE (init_code) == INIT_EXPR)
5513 init = TREE_OPERAND (init_code, 1);
5514 init_code = NULL_TREE;
5515 /* Don't call digest_init; it's unnecessary and will complain
5516 about aggregate initialization of non-aggregate classes. */
5517 flags |= LOOKUP_ALREADY_DIGESTED;
5519 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5521 /* Declared constexpr, but no suitable initializer; massage
5522 init appropriately so we can pass it into store_init_value
5524 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5525 init = finish_compound_literal (type, init,
5526 tf_warning_or_error);
5527 else if (CLASS_TYPE_P (type)
5528 && (!init || TREE_CODE (init) == TREE_LIST))
5530 init = build_functional_cast (type, init, tf_none);
5531 if (init != error_mark_node)
5532 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5534 init_code = NULL_TREE;
5540 if (init && TREE_CODE (init) != TREE_VEC)
5542 init_code = store_init_value (decl, init, flags);
5543 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5544 && DECL_INITIAL (decl)
5545 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5546 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5547 warning (0, "array %qD initialized by parenthesized string literal %qE",
5548 decl, DECL_INITIAL (decl));
5554 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5555 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5556 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5557 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5560 check_for_uninitialized_const_var (decl);
5563 if (init && init != error_mark_node)
5564 init_code = build2 (INIT_EXPR, type, decl, init);
5567 init_code = add_stmt_to_compound (extra_init, init_code);
5569 if (init_code && DECL_IN_AGGR_P (decl))
5571 static int explained = 0;
5573 if (cxx_dialect < cxx0x)
5574 error ("initializer invalid for static member with constructor");
5576 error ("non-constant in-class initialization invalid for static "
5577 "member %qD", decl);
5580 error ("(an out of class initialization is required)");
5588 /* If DECL is not a local variable, give it RTL. */
5591 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5593 int toplev = toplevel_bindings_p ();
5595 const char *filename;
5597 /* Set the DECL_ASSEMBLER_NAME for the object. */
5600 /* The `register' keyword, when used together with an
5601 asm-specification, indicates that the variable should be
5602 placed in a particular register. */
5603 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5605 set_user_assembler_name (decl, asmspec);
5606 DECL_HARD_REGISTER (decl) = 1;
5610 if (TREE_CODE (decl) == FUNCTION_DECL
5611 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5612 set_builtin_user_assembler_name (decl, asmspec);
5613 set_user_assembler_name (decl, asmspec);
5617 /* Handle non-variables up front. */
5618 if (TREE_CODE (decl) != VAR_DECL)
5620 rest_of_decl_compilation (decl, toplev, at_eof);
5624 /* If we see a class member here, it should be a static data
5626 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5628 gcc_assert (TREE_STATIC (decl));
5629 /* An in-class declaration of a static data member should be
5630 external; it is only a declaration, and not a definition. */
5631 if (init == NULL_TREE)
5632 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5635 /* We don't create any RTL for local variables. */
5636 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5639 /* We defer emission of local statics until the corresponding
5640 DECL_EXPR is expanded. */
5641 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5643 /* We try to defer namespace-scope static constants so that they are
5644 not emitted into the object file unnecessarily. */
5645 filename = input_filename;
5646 if (!DECL_VIRTUAL_P (decl)
5647 && TREE_READONLY (decl)
5648 && DECL_INITIAL (decl) != NULL_TREE
5649 && DECL_INITIAL (decl) != error_mark_node
5651 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5653 && !TREE_PUBLIC (decl))
5655 /* Fool with the linkage of static consts according to #pragma
5657 struct c_fileinfo *finfo = get_fileinfo (filename);
5658 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5660 TREE_PUBLIC (decl) = 1;
5661 DECL_EXTERNAL (decl) = finfo->interface_only;
5666 /* Likewise for template instantiations. */
5667 else if (DECL_LANG_SPECIFIC (decl)
5668 && DECL_IMPLICIT_INSTANTIATION (decl))
5671 /* If we're not deferring, go ahead and assemble the variable. */
5673 rest_of_decl_compilation (decl, toplev, at_eof);
5676 /* walk_tree helper for wrap_temporary_cleanups, below. */
5679 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5681 if (TYPE_P (*stmt_p))
5687 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5689 tree guard = (tree)data;
5690 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5692 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5693 /* Tell honor_protect_cleanup_actions to handle this as a separate
5695 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5697 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5703 /* We're initializing a local variable which has a cleanup GUARD. If there
5704 are any temporaries used in the initializer INIT of this variable, we
5705 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5706 variable will be cleaned up properly if one of them throws.
5708 Unfortunately, there's no way to express this properly in terms of
5709 nesting, as the regions for the temporaries overlap the region for the
5710 variable itself; if there are two temporaries, the variable needs to be
5711 the first thing destroyed if either of them throws. However, we only
5712 want to run the variable's cleanup if it actually got constructed. So
5713 we need to guard the temporary cleanups with the variable's cleanup if
5714 they are run on the normal path, but not if they are run on the
5715 exceptional path. We implement this by telling
5716 honor_protect_cleanup_actions to strip the variable cleanup from the
5717 exceptional path. */
5720 wrap_temporary_cleanups (tree init, tree guard)
5722 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5725 /* Generate code to initialize DECL (a local variable). */
5728 initialize_local_var (tree decl, tree init)
5730 tree type = TREE_TYPE (decl);
5734 gcc_assert (TREE_CODE (decl) == VAR_DECL
5735 || TREE_CODE (decl) == RESULT_DECL);
5736 gcc_assert (!TREE_STATIC (decl));
5738 if (DECL_SIZE (decl) == NULL_TREE)
5740 /* If we used it already as memory, it must stay in memory. */
5741 DECL_INITIAL (decl) = NULL_TREE;
5742 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5746 if (type == error_mark_node)
5749 /* Compute and store the initial value. */
5750 already_used = TREE_USED (decl) || TREE_USED (type);
5751 if (TREE_USED (type))
5752 DECL_READ_P (decl) = 1;
5754 /* Generate a cleanup, if necessary. */
5755 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5757 /* Perform the initialization. */
5760 if (TREE_CODE (init) == INIT_EXPR
5761 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init, 1)))
5763 /* Stick simple initializers in DECL_INITIAL so that
5764 -Wno-init-self works (c++/34772). */
5765 gcc_assert (TREE_OPERAND (init, 0) == decl);
5766 DECL_INITIAL (decl) = TREE_OPERAND (init, 1);
5770 int saved_stmts_are_full_exprs_p;
5772 /* If we're only initializing a single object, guard the
5773 destructors of any temporaries used in its initializer with
5774 its destructor. This isn't right for arrays because each
5775 element initialization is a full-expression. */
5776 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5777 wrap_temporary_cleanups (init, cleanup);
5779 gcc_assert (building_stmt_list_p ());
5780 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5781 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5782 finish_expr_stmt (init);
5783 current_stmt_tree ()->stmts_are_full_exprs_p =
5784 saved_stmts_are_full_exprs_p;
5788 /* Set this to 0 so we can tell whether an aggregate which was
5789 initialized was ever used. Don't do this if it has a
5790 destructor, so we don't complain about the 'resource
5791 allocation is initialization' idiom. Now set
5792 attribute((unused)) on types so decls of that type will be
5793 marked used. (see TREE_USED, above.) */
5794 if (TYPE_NEEDS_CONSTRUCTING (type)
5796 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5797 && DECL_NAME (decl))
5798 TREE_USED (decl) = 0;
5799 else if (already_used)
5800 TREE_USED (decl) = 1;
5803 finish_decl_cleanup (decl, cleanup);
5806 /* DECL is a VAR_DECL for a compiler-generated variable with static
5807 storage duration (like a virtual table) whose initializer is a
5808 compile-time constant. Initialize the variable and provide it to the
5812 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5815 gcc_assert (DECL_ARTIFICIAL (decl));
5816 init = build_constructor (TREE_TYPE (decl), v);
5817 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5818 DECL_INITIAL (decl) = init;
5819 DECL_INITIALIZED_P (decl) = 1;
5820 determine_visibility (decl);
5821 layout_var_decl (decl);
5822 maybe_commonize_var (decl);
5823 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5826 /* INIT is the initializer for a variable, as represented by the
5827 parser. Returns true iff INIT is type-dependent. */
5830 type_dependent_init_p (tree init)
5832 if (TREE_CODE (init) == TREE_LIST)
5833 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5834 return any_type_dependent_elements_p (init);
5835 else if (TREE_CODE (init) == CONSTRUCTOR)
5836 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5838 VEC(constructor_elt, gc) *elts;
5842 elts = CONSTRUCTOR_ELTS (init);
5843 nelts = VEC_length (constructor_elt, elts);
5844 for (i = 0; i < nelts; ++i)
5845 if (type_dependent_init_p (VEC_index (constructor_elt,
5850 /* It must be a simple expression, e.g., int i = 3; */
5851 return type_dependent_expression_p (init);
5856 /* INIT is the initializer for a variable, as represented by the
5857 parser. Returns true iff INIT is value-dependent. */
5860 value_dependent_init_p (tree init)
5862 if (TREE_CODE (init) == TREE_LIST)
5863 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5864 return any_value_dependent_elements_p (init);
5865 else if (TREE_CODE (init) == CONSTRUCTOR)
5866 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5868 VEC(constructor_elt, gc) *elts;
5872 elts = CONSTRUCTOR_ELTS (init);
5873 nelts = VEC_length (constructor_elt, elts);
5874 for (i = 0; i < nelts; ++i)
5875 if (value_dependent_init_p (VEC_index (constructor_elt,
5880 /* It must be a simple expression, e.g., int i = 3; */
5881 return value_dependent_expression_p (init);
5886 /* Finish processing of a declaration;
5887 install its line number and initial value.
5888 If the length of an array type is not known before,
5889 it must be determined now, from the initial value, or it is an error.
5891 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5892 true, then INIT is an integral constant expression.
5894 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5895 if the (init) syntax was used. */
5898 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5899 tree asmspec_tree, int flags)
5903 const char *asmspec = NULL;
5904 int was_readonly = 0;
5905 bool var_definition_p = false;
5908 if (decl == error_mark_node)
5913 error ("assignment (not initialization) in declaration");
5917 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5918 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5919 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5921 type = TREE_TYPE (decl);
5922 if (type == error_mark_node)
5925 /* Assume no cleanup is required. */
5926 cleanup = NULL_TREE;
5928 /* If a name was specified, get the string. */
5929 if (at_namespace_scope_p ())
5930 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5931 if (asmspec_tree && asmspec_tree != error_mark_node)
5932 asmspec = TREE_STRING_POINTER (asmspec_tree);
5934 if (current_class_type
5935 && CP_DECL_CONTEXT (decl) == current_class_type
5936 && TYPE_BEING_DEFINED (current_class_type)
5937 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type)
5938 && (DECL_INITIAL (decl) || init))
5939 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5941 auto_node = type_uses_auto (type);
5945 if (init == NULL_TREE)
5947 error ("declaration of %q#D has no initializer", decl);
5948 TREE_TYPE (decl) = error_mark_node;
5952 if (TREE_CODE (d_init) == TREE_LIST)
5953 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5954 tf_warning_or_error);
5955 d_init = resolve_nondeduced_context (d_init);
5956 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5958 if (type == error_mark_node)
5962 if (!ensure_literal_type_for_constexpr_object (decl))
5963 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5965 if (TREE_CODE (decl) == VAR_DECL
5966 && DECL_CLASS_SCOPE_P (decl)
5967 && DECL_INITIALIZED_IN_CLASS_P (decl))
5968 check_static_variable_definition (decl, type);
5970 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5973 if (init == ridpointers[(int)RID_DELETE])
5975 /* FIXME check this is 1st decl. */
5976 DECL_DELETED_FN (decl) = 1;
5977 DECL_DECLARED_INLINE_P (decl) = 1;
5978 DECL_INITIAL (decl) = error_mark_node;
5979 FOR_EACH_CLONE (clone, decl)
5981 DECL_DELETED_FN (clone) = 1;
5982 DECL_DECLARED_INLINE_P (clone) = 1;
5983 DECL_INITIAL (clone) = error_mark_node;
5987 else if (init == ridpointers[(int)RID_DEFAULT])
5989 if (defaultable_fn_check (decl))
5990 DECL_DEFAULTED_FN (decl) = 1;
5992 DECL_INITIAL (decl) = NULL_TREE;
5996 if (init && TREE_CODE (decl) == VAR_DECL)
5998 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5999 /* If DECL is a reference, then we want to know whether init is a
6000 reference constant; init_const_expr_p as passed tells us whether
6001 it's an rvalue constant. */
6002 if (TREE_CODE (type) == REFERENCE_TYPE)
6003 init_const_expr_p = potential_constant_expression (init);
6004 if (init_const_expr_p)
6006 /* Set these flags now for templates. We'll update the flags in
6007 store_init_value for instantiations. */
6008 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
6009 if (decl_maybe_constant_var_p (decl))
6010 TREE_CONSTANT (decl) = 1;
6014 if (processing_template_decl)
6016 bool type_dependent_p;
6018 /* Add this declaration to the statement-tree. */
6019 if (at_function_scope_p ())
6020 add_decl_expr (decl);
6022 type_dependent_p = dependent_type_p (type);
6024 if (check_for_bare_parameter_packs (init))
6027 DECL_INITIAL (decl) = NULL_TREE;
6030 /* Generally, initializers in templates are expanded when the
6031 template is instantiated. But, if DECL is a variable constant
6032 then it can be used in future constant expressions, so its value
6033 must be available. */
6035 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
6036 /* We can't do anything if the decl has dependent type. */;
6038 && init_const_expr_p
6039 && !type_dependent_p
6040 && decl_maybe_constant_var_p (decl)
6041 && !type_dependent_init_p (init)
6042 && !value_dependent_init_p (init))
6044 /* This variable seems to be a non-dependent constant, so process
6045 its initializer. If check_initializer returns non-null the
6046 initialization wasn't constant after all. */
6047 tree init_code = check_initializer (decl, init, flags, &cleanup);
6048 if (init_code == NULL_TREE)
6051 else if (!DECL_PRETTY_FUNCTION_P (decl))
6052 /* Deduce array size even if the initializer is dependent. */
6053 maybe_deduce_size_from_array_init (decl, init);
6056 DECL_INITIAL (decl) = init;
6060 /* Take care of TYPE_DECLs up front. */
6061 if (TREE_CODE (decl) == TYPE_DECL)
6063 if (type != error_mark_node
6064 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
6066 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
6067 warning (0, "shadowing previous type declaration of %q#D", decl);
6068 set_identifier_type_value (DECL_NAME (decl), decl);
6071 /* If we have installed this as the canonical typedef for this
6072 type, and that type has not been defined yet, delay emitting
6073 the debug information for it, as we will emit it later. */
6074 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
6075 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
6076 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6078 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6083 /* A reference will be modified here, as it is initialized. */
6084 if (! DECL_EXTERNAL (decl)
6085 && TREE_READONLY (decl)
6086 && TREE_CODE (type) == REFERENCE_TYPE)
6089 TREE_READONLY (decl) = 0;
6092 if (TREE_CODE (decl) == VAR_DECL)
6094 /* Only variables with trivial initialization and destruction can
6095 have thread-local storage. */
6096 if (DECL_THREAD_LOCAL_P (decl)
6097 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6098 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6099 error ("%qD cannot be thread-local because it has non-trivial "
6100 "type %qT", decl, TREE_TYPE (decl));
6101 /* If this is a local variable that will need a mangled name,
6102 register it now. We must do this before processing the
6103 initializer for the variable, since the initialization might
6104 require a guard variable, and since the mangled name of the
6105 guard variable will depend on the mangled name of this
6107 if (DECL_FUNCTION_SCOPE_P (decl)
6108 && TREE_STATIC (decl)
6109 && !DECL_ARTIFICIAL (decl))
6111 push_local_name (decl);
6112 if (DECL_CONSTRUCTOR_P (current_function_decl)
6113 || DECL_DESTRUCTOR_P (current_function_decl))
6114 /* Normally local_decls is populated during GIMPLE lowering,
6115 but [cd]tors are never actually compiled directly. We need
6116 to put statics on the list so we can deal with the label
6117 address extension. */
6118 add_local_decl (cfun, decl);
6121 /* Convert the initializer to the type of DECL, if we have not
6122 already initialized DECL. */
6123 if (!DECL_INITIALIZED_P (decl)
6124 /* If !DECL_EXTERNAL then DECL is being defined. In the
6125 case of a static data member initialized inside the
6126 class-specifier, there can be an initializer even if DECL
6127 is *not* defined. */
6128 && (!DECL_EXTERNAL (decl) || init))
6130 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6133 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6134 /* Allow libjava/prims.cc define primitive classes. */
6135 if (init != NULL_TREE
6136 || jclass == NULL_TREE
6137 || TREE_CODE (jclass) != TYPE_DECL
6138 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6139 || !same_type_ignoring_top_level_qualifiers_p
6140 (type, TREE_TYPE (TREE_TYPE (jclass))))
6141 error ("Java object %qD not allocated with %<new%>", decl);
6144 init = check_initializer (decl, init, flags, &cleanup);
6145 /* Thread-local storage cannot be dynamically initialized. */
6146 if (DECL_THREAD_LOCAL_P (decl) && init)
6148 error ("%qD is thread-local and so cannot be dynamically "
6149 "initialized", decl);
6153 /* Check that the initializer for a static data member was a
6154 constant. Although we check in the parser that the
6155 initializer is an integral constant expression, we do not
6156 simplify division-by-zero at the point at which it
6157 occurs. Therefore, in:
6159 struct S { static const int i = 7 / 0; };
6161 we issue an error at this point. It would
6162 probably be better to forbid division by zero in
6163 integral constant expressions. */
6164 if (DECL_EXTERNAL (decl) && init)
6166 error ("%qD cannot be initialized by a non-constant expression"
6167 " when being declared", decl);
6168 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6176 The memory occupied by any object of static storage
6177 duration is zero-initialized at program startup before
6178 any other initialization takes place.
6180 We cannot create an appropriate initializer until after
6181 the type of DECL is finalized. If DECL_INITIAL is set,
6182 then the DECL is statically initialized, and any
6183 necessary zero-initialization has already been performed. */
6184 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6185 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6186 /*nelts=*/NULL_TREE,
6187 /*static_storage_p=*/true);
6188 /* Remember that the initialization for this variable has
6190 DECL_INITIALIZED_P (decl) = 1;
6191 /* This declaration is the definition of this variable,
6192 unless we are initializing a static data member within
6193 the class specifier. */
6194 if (!DECL_EXTERNAL (decl))
6195 var_definition_p = true;
6197 /* If the variable has an array type, lay out the type, even if
6198 there is no initializer. It is valid to index through the
6199 array, and we must get TYPE_ALIGN set correctly on the array
6201 else if (TREE_CODE (type) == ARRAY_TYPE)
6204 if (TREE_STATIC (decl)
6205 && !at_function_scope_p ()
6206 && current_function_decl == NULL)
6207 /* So decl is a global variable or a static member of a
6208 non local class. Record the types it uses
6209 so that we can decide later to emit debug info for them. */
6210 record_types_used_by_current_var_decl (decl);
6212 else if (TREE_CODE (decl) == FIELD_DECL
6213 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6214 error ("non-static data member %qD has Java class type", decl);
6216 /* Add this declaration to the statement-tree. This needs to happen
6217 after the call to check_initializer so that the DECL_EXPR for a
6218 reference temp is added before the DECL_EXPR for the reference itself. */
6219 if (DECL_FUNCTION_SCOPE_P (decl))
6220 add_decl_expr (decl);
6222 /* Let the middle end know about variables and functions -- but not
6223 static data members in uninstantiated class templates. */
6224 if (TREE_CODE (decl) == VAR_DECL
6225 || TREE_CODE (decl) == FUNCTION_DECL)
6227 if (TREE_CODE (decl) == VAR_DECL)
6229 layout_var_decl (decl);
6230 maybe_commonize_var (decl);
6233 /* This needs to happen after the linkage is set. */
6234 determine_visibility (decl);
6236 if (var_definition_p && TREE_STATIC (decl))
6238 /* If a TREE_READONLY variable needs initialization
6239 at runtime, it is no longer readonly and we need to
6240 avoid MEM_READONLY_P being set on RTL created for it. */
6243 if (TREE_READONLY (decl))
6244 TREE_READONLY (decl) = 0;
6247 else if (was_readonly)
6248 TREE_READONLY (decl) = 1;
6251 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6253 /* Check for abstractness of the type. Notice that there is no
6254 need to strip array types here since the check for those types
6255 is already done within create_array_type_for_decl. */
6256 if (TREE_CODE (type) == FUNCTION_TYPE
6257 || TREE_CODE (type) == METHOD_TYPE)
6258 abstract_virtuals_error (decl, TREE_TYPE (type));
6260 abstract_virtuals_error (decl, type);
6262 if (TREE_TYPE (decl) == error_mark_node)
6263 /* No initialization required. */
6265 else if (TREE_CODE (decl) == FUNCTION_DECL)
6269 if (init == ridpointers[(int)RID_DEFAULT])
6271 /* An out-of-class default definition is defined at
6272 the point where it is explicitly defaulted. */
6273 if (DECL_DELETED_FN (decl))
6274 maybe_explain_implicit_delete (decl);
6275 else if (DECL_INITIAL (decl) == error_mark_node)
6276 synthesize_method (decl);
6279 error ("function %q#D is initialized like a variable", decl);
6281 /* else no initialization required. */
6283 else if (DECL_EXTERNAL (decl)
6284 && ! (DECL_LANG_SPECIFIC (decl)
6285 && DECL_NOT_REALLY_EXTERN (decl)))
6288 DECL_INITIAL (decl) = init;
6290 /* A variable definition. */
6291 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6292 /* Initialize the local variable. */
6293 initialize_local_var (decl, init);
6295 /* If a variable is defined, and then a subsequent
6296 definition with external linkage is encountered, we will
6297 get here twice for the same variable. We want to avoid
6298 calling expand_static_init more than once. For variables
6299 that are not static data members, we can call
6300 expand_static_init only when we actually process the
6301 initializer. It is not legal to redeclare a static data
6302 member, so this issue does not arise in that case. */
6303 else if (var_definition_p && TREE_STATIC (decl))
6304 expand_static_init (decl, init);
6307 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6308 reference, insert it in the statement-tree now. */
6310 push_cleanup (decl, cleanup, false);
6313 TREE_READONLY (decl) = 1;
6316 /* Returns a declaration for a VAR_DECL as if:
6318 extern "C" TYPE NAME;
6320 had been seen. Used to create compiler-generated global
6324 declare_global_var (tree name, tree type)
6328 push_to_top_level ();
6329 decl = build_decl (input_location, VAR_DECL, name, type);
6330 TREE_PUBLIC (decl) = 1;
6331 DECL_EXTERNAL (decl) = 1;
6332 DECL_ARTIFICIAL (decl) = 1;
6333 /* If the user has explicitly declared this variable (perhaps
6334 because the code we are compiling is part of a low-level runtime
6335 library), then it is possible that our declaration will be merged
6336 with theirs by pushdecl. */
6337 decl = pushdecl (decl);
6338 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6339 pop_from_top_level ();
6344 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6345 if "__cxa_atexit" is not being used) corresponding to the function
6346 to be called when the program exits. */
6349 get_atexit_fn_ptr_type (void)
6353 if (!atexit_fn_ptr_type_node)
6356 if (flag_use_cxa_atexit
6357 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6358 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6359 arg_type = ptr_type_node;
6361 /* The parameter to "atexit" is "void (*)(void)". */
6362 arg_type = NULL_TREE;
6364 fn_type = build_function_type_list (void_type_node,
6365 arg_type, NULL_TREE);
6366 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6369 return atexit_fn_ptr_type_node;
6372 /* Returns a pointer to the `atexit' function. Note that if
6373 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6374 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6377 get_atexit_node (void)
6383 bool use_aeabi_atexit;
6388 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6390 /* The declaration for `__cxa_atexit' is:
6392 int __cxa_atexit (void (*)(void *), void *, void *)
6394 We build up the argument types and then the function type
6396 tree argtype0, argtype1, argtype2;
6398 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6399 /* First, build the pointer-to-function type for the first
6401 fn_ptr_type = get_atexit_fn_ptr_type ();
6402 /* Then, build the rest of the argument types. */
6403 argtype2 = ptr_type_node;
6404 if (use_aeabi_atexit)
6406 argtype1 = fn_ptr_type;
6407 argtype0 = ptr_type_node;
6411 argtype1 = ptr_type_node;
6412 argtype0 = fn_ptr_type;
6414 /* And the final __cxa_atexit type. */
6415 fn_type = build_function_type_list (integer_type_node,
6416 argtype0, argtype1, argtype2,
6418 fn_ptr_type = build_pointer_type (fn_type);
6419 if (use_aeabi_atexit)
6420 name = "__aeabi_atexit";
6422 name = "__cxa_atexit";
6426 /* The declaration for `atexit' is:
6428 int atexit (void (*)());
6430 We build up the argument types and then the function type
6432 fn_ptr_type = get_atexit_fn_ptr_type ();
6433 /* Build the final atexit type. */
6434 fn_type = build_function_type_list (integer_type_node,
6435 fn_ptr_type, NULL_TREE);
6439 /* Now, build the function declaration. */
6440 push_lang_context (lang_name_c);
6441 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6442 mark_used (atexit_fndecl);
6443 pop_lang_context ();
6444 atexit_node = decay_conversion (atexit_fndecl);
6449 /* Returns the __dso_handle VAR_DECL. */
6452 get_dso_handle_node (void)
6454 if (dso_handle_node)
6455 return dso_handle_node;
6457 /* Declare the variable. */
6458 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6461 #ifdef HAVE_GAS_HIDDEN
6462 DECL_VISIBILITY (dso_handle_node) = VISIBILITY_HIDDEN;
6463 DECL_VISIBILITY_SPECIFIED (dso_handle_node) = 1;
6466 return dso_handle_node;
6469 /* Begin a new function with internal linkage whose job will be simply
6470 to destroy some particular variable. */
6472 static GTY(()) int start_cleanup_cnt;
6475 start_cleanup_fn (void)
6480 bool use_cxa_atexit = flag_use_cxa_atexit
6481 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6483 push_to_top_level ();
6485 /* No need to mangle this. */
6486 push_lang_context (lang_name_c);
6488 /* Build the name of the function. */
6489 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6490 /* Build the function declaration. */
6491 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6492 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6493 /* It's a function with internal linkage, generated by the
6495 TREE_PUBLIC (fndecl) = 0;
6496 DECL_ARTIFICIAL (fndecl) = 1;
6497 /* Make the function `inline' so that it is only emitted if it is
6498 actually needed. It is unlikely that it will be inlined, since
6499 it is only called via a function pointer, but we avoid unnecessary
6500 emissions this way. */
6501 DECL_DECLARED_INLINE_P (fndecl) = 1;
6502 DECL_INTERFACE_KNOWN (fndecl) = 1;
6503 /* Build the parameter. */
6508 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6509 DECL_CONTEXT (parmdecl) = fndecl;
6510 TREE_USED (parmdecl) = 1;
6511 DECL_READ_P (parmdecl) = 1;
6512 DECL_ARGUMENTS (fndecl) = parmdecl;
6516 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6518 pop_lang_context ();
6520 return current_function_decl;
6523 /* Finish the cleanup function begun by start_cleanup_fn. */
6526 end_cleanup_fn (void)
6528 expand_or_defer_fn (finish_function (0));
6530 pop_from_top_level ();
6533 /* Generate code to handle the destruction of DECL, an object with
6534 static storage duration. */
6537 register_dtor_fn (tree decl)
6544 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6546 type = TREE_TYPE (decl);
6547 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6548 return void_zero_node;
6550 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6551 a class object, we can just pass the destructor to
6552 "__cxa_atexit"; we don't have to build a temporary function to do
6554 use_dtor = (flag_use_cxa_atexit
6555 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6556 && CLASS_TYPE_P (type));
6561 /* Find the destructor. */
6562 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6563 gcc_assert (idx >= 0);
6564 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6565 /* Make sure it is accessible. */
6566 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6570 /* Call build_cleanup before we enter the anonymous function so
6571 that any access checks will be done relative to the current
6572 scope, rather than the scope of the anonymous function. */
6573 build_cleanup (decl);
6575 /* Now start the function. */
6576 cleanup = start_cleanup_fn ();
6578 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6579 to the original function, rather than the anonymous one. That
6580 will make the back end think that nested functions are in use,
6581 which causes confusion. */
6582 push_deferring_access_checks (dk_no_check);
6583 fcall = build_cleanup (decl);
6584 pop_deferring_access_checks ();
6586 /* Create the body of the anonymous function. */
6587 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6588 finish_expr_stmt (fcall);
6589 finish_compound_stmt (compound_stmt);
6593 /* Call atexit with the cleanup function. */
6594 mark_used (cleanup);
6595 cleanup = build_address (cleanup);
6596 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6602 /* We must convert CLEANUP to the type that "__cxa_atexit"
6604 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6605 /* "__cxa_atexit" will pass the address of DECL to the
6606 cleanup function. */
6608 addr = build_address (decl);
6609 /* The declared type of the parameter to "__cxa_atexit" is
6610 "void *". For plain "T*", we could just let the
6611 machinery in cp_build_function_call convert it -- but if the
6612 type is "cv-qualified T *", then we need to convert it
6613 before passing it in, to avoid spurious errors. */
6614 addr = build_nop (ptr_type_node, addr);
6617 /* Since the cleanup functions we build ignore the address
6618 they're given, there's no reason to pass the actual address
6619 in, and, in general, it's cheaper to pass NULL than any
6621 addr = null_pointer_node;
6622 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6623 tf_warning_or_error);
6624 if (targetm.cxx.use_aeabi_atexit ())
6637 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6638 arg0, arg1, arg2, NULL_TREE);
6641 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6642 is its initializer. Generate code to handle the construction
6643 and destruction of DECL. */
6646 expand_static_init (tree decl, tree init)
6648 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6649 gcc_assert (TREE_STATIC (decl));
6651 /* Some variables require no dynamic initialization. */
6653 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6656 if (DECL_FUNCTION_SCOPE_P (decl))
6658 /* Emit code to perform this initialization but once. */
6659 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6660 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6661 tree guard, guard_addr;
6664 /* Emit code to perform this initialization but once. This code
6667 static <type> guard;
6668 if (!guard.first_byte) {
6669 if (__cxa_guard_acquire (&guard)) {
6672 // Do initialization.
6673 flag = true; __cxa_guard_release (&guard);
6674 // Register variable for destruction at end of program.
6676 if (!flag) __cxa_guard_abort (&guard);
6680 Note that the `flag' variable is only set to 1 *after* the
6681 initialization is complete. This ensures that an exception,
6682 thrown during the construction, will cause the variable to
6683 reinitialized when we pass through this code again, as per:
6687 If the initialization exits by throwing an exception, the
6688 initialization is not complete, so it will be tried again
6689 the next time control enters the declaration.
6691 This process should be thread-safe, too; multiple threads
6692 should not be able to initialize the variable more than
6695 /* Create the guard variable. */
6696 guard = get_guard (decl);
6698 /* This optimization isn't safe on targets with relaxed memory
6699 consistency. On such targets we force synchronization in
6700 __cxa_guard_acquire. */
6701 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6703 /* Begin the conditional initialization. */
6704 if_stmt = begin_if_stmt ();
6705 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6706 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6709 if (flag_threadsafe_statics)
6711 tree vfntype = NULL_TREE;
6712 tree acquire_name, release_name, abort_name;
6713 tree acquire_fn, release_fn, abort_fn;
6714 guard_addr = build_address (guard);
6716 acquire_name = get_identifier ("__cxa_guard_acquire");
6717 release_name = get_identifier ("__cxa_guard_release");
6718 abort_name = get_identifier ("__cxa_guard_abort");
6719 acquire_fn = identifier_global_value (acquire_name);
6720 release_fn = identifier_global_value (release_name);
6721 abort_fn = identifier_global_value (abort_name);
6723 acquire_fn = push_library_fn
6724 (acquire_name, build_function_type_list (integer_type_node,
6725 TREE_TYPE (guard_addr),
6728 if (!release_fn || !abort_fn)
6729 vfntype = build_function_type_list (void_type_node,
6730 TREE_TYPE (guard_addr),
6733 release_fn = push_library_fn (release_name, vfntype, NULL_TREE);
6735 abort_fn = push_library_fn (abort_name, vfntype, NULL_TREE);
6737 inner_if_stmt = begin_if_stmt ();
6738 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6741 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6742 begin = get_target_expr (boolean_false_node);
6743 flag = TARGET_EXPR_SLOT (begin);
6745 TARGET_EXPR_CLEANUP (begin)
6746 = build3 (COND_EXPR, void_type_node, flag,
6748 build_call_n (abort_fn, 1, guard_addr));
6749 CLEANUP_EH_ONLY (begin) = 1;
6751 /* Do the initialization itself. */
6752 init = add_stmt_to_compound (begin, init);
6753 init = add_stmt_to_compound
6754 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6755 init = add_stmt_to_compound
6756 (init, build_call_n (release_fn, 1, guard_addr));
6759 init = add_stmt_to_compound (init, set_guard (guard));
6761 /* Use atexit to register a function for destroying this static
6763 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6765 finish_expr_stmt (init);
6767 if (flag_threadsafe_statics)
6769 finish_compound_stmt (inner_then_clause);
6770 finish_then_clause (inner_if_stmt);
6771 finish_if_stmt (inner_if_stmt);
6774 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6776 finish_compound_stmt (then_clause);
6777 finish_then_clause (if_stmt);
6778 finish_if_stmt (if_stmt);
6782 static_aggregates = tree_cons (init, decl, static_aggregates);
6786 /* Make TYPE a complete type based on INITIAL_VALUE.
6787 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6788 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6789 3 if the initializer list is empty (in pedantic mode). */
6792 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6795 tree type, elt_type;
6799 unsigned HOST_WIDE_INT i;
6802 /* An array of character type can be initialized from a
6803 brace-enclosed string constant.
6805 FIXME: this code is duplicated from reshape_init. Probably
6806 we should just call reshape_init here? */
6807 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6808 && TREE_CODE (initial_value) == CONSTRUCTOR
6809 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6811 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6812 tree value = VEC_index (constructor_elt, v, 0)->value;
6814 if (TREE_CODE (value) == STRING_CST
6815 && VEC_length (constructor_elt, v) == 1)
6816 initial_value = value;
6819 /* If any of the elements are parameter packs, we can't actually
6820 complete this type now because the array size is dependent. */
6821 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6823 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6826 if (PACK_EXPANSION_P (value))
6832 failure = complete_array_type (ptype, initial_value, do_default);
6834 /* We can create the array before the element type is complete, which
6835 means that we didn't have these two bits set in the original type
6836 either. In completing the type, we are expected to propagate these
6837 bits. See also complete_type which does the same thing for arrays
6840 if (TYPE_DOMAIN (type))
6842 elt_type = TREE_TYPE (type);
6843 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6844 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6845 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6851 /* As above, but either give an error or reject zero-size arrays, depending
6855 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6856 bool do_default, tsubst_flags_t complain)
6859 bool sfinae = !(complain & tf_error);
6860 /* In SFINAE context we can't be lenient about zero-size arrays. */
6863 failure = cp_complete_array_type (ptype, initial_value, do_default);
6869 /* Not an error. */;
6870 else if (failure == 1)
6871 error ("initializer fails to determine size of %qT", *ptype);
6872 else if (failure == 2)
6875 error ("array size missing in %qT", *ptype);
6877 else if (failure == 3)
6878 error ("zero-size array %qT", *ptype);
6879 *ptype = error_mark_node;
6884 /* Return zero if something is declared to be a member of type
6885 CTYPE when in the context of CUR_TYPE. STRING is the error
6886 message to print in that case. Otherwise, quietly return 1. */
6889 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6891 if (ctype && ctype != cur_type)
6893 if (flags == DTOR_FLAG)
6894 error ("destructor for alien class %qT cannot be a member", ctype);
6896 error ("constructor for alien class %qT cannot be a member", ctype);
6902 /* Subroutine of `grokdeclarator'. */
6904 /* Generate errors possibly applicable for a given set of specifiers.
6905 This is for ARM $7.1.2. */
6908 bad_specifiers (tree object,
6909 enum bad_spec_place type,
6920 error ("%qD declared as a %<virtual%> variable", object);
6922 error ("%qD declared as an %<inline%> variable", object);
6924 error ("%<const%> and %<volatile%> function specifiers on "
6925 "%qD invalid in variable declaration", object);
6929 error ("%qD declared as a %<virtual%> parameter", object);
6931 error ("%qD declared as an %<inline%> parameter", object);
6933 error ("%<const%> and %<volatile%> function specifiers on "
6934 "%qD invalid in parameter declaration", object);
6938 error ("%qD declared as a %<virtual%> type", object);
6940 error ("%qD declared as an %<inline%> type", object);
6942 error ("%<const%> and %<volatile%> function specifiers on "
6943 "%qD invalid in type declaration", object);
6947 error ("%qD declared as a %<virtual%> field", object);
6949 error ("%qD declared as an %<inline%> field", object);
6951 error ("%<const%> and %<volatile%> function specifiers on "
6952 "%qD invalid in field declaration", object);
6958 error ("%q+D declared as a friend", object);
6960 && (TREE_CODE (object) == TYPE_DECL
6961 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6962 && !TYPE_REFFN_P (TREE_TYPE (object))
6963 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6964 error ("%q+D declared with an exception specification", object);
6967 /* DECL is a member function or static data member and is presently
6968 being defined. Check that the definition is taking place in a
6972 check_class_member_definition_namespace (tree decl)
6974 /* These checks only apply to member functions and static data
6976 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6977 || TREE_CODE (decl) == VAR_DECL);
6978 /* We check for problems with specializations in pt.c in
6979 check_specialization_namespace, where we can issue better
6981 if (processing_specialization)
6983 /* There are no restrictions on the placement of
6984 explicit instantiations. */
6985 if (processing_explicit_instantiation)
6989 A member function definition that appears outside of the
6990 class definition shall appear in a namespace scope enclosing
6991 the class definition.
6995 The definition for a static data member shall appear in a
6996 namespace scope enclosing the member's class definition. */
6997 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6998 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6999 decl, DECL_CONTEXT (decl));
7002 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7003 METHOD_TYPE for a non-static member function; QUALS are the
7004 cv-qualifiers that apply to the function. */
7007 build_this_parm (tree type, cp_cv_quals quals)
7012 cp_cv_quals this_quals;
7014 if (CLASS_TYPE_P (type))
7017 = cp_build_qualified_type (type, quals & ~TYPE_QUAL_RESTRICT);
7018 this_type = build_pointer_type (this_type);
7021 this_type = type_of_this_parm (type);
7022 /* The `this' parameter is implicitly `const'; it cannot be
7024 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
7025 qual_type = cp_build_qualified_type (this_type, this_quals);
7026 parm = build_artificial_parm (this_identifier, qual_type);
7027 cp_apply_type_quals_to_decl (this_quals, parm);
7031 /* DECL is a static member function. Complain if it was declared
7032 with function-cv-quals. */
7035 check_static_quals (tree decl, cp_cv_quals quals)
7037 if (quals != TYPE_UNQUALIFIED)
7038 error ("static member function %q#D declared with type qualifiers",
7042 /* CTYPE is class type, or null if non-class.
7043 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7045 DECLARATOR is the function's name.
7046 PARMS is a chain of PARM_DECLs for the function.
7047 VIRTUALP is truthvalue of whether the function is virtual or not.
7048 FLAGS are to be passed through to `grokclassfn'.
7049 QUALS are qualifiers indicating whether the function is `const'
7051 RAISES is a list of exceptions that this function can raise.
7052 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7053 not look, and -1 if we should not call `grokclassfn' at all.
7055 SFK is the kind of special function (if any) for the new function.
7057 Returns `NULL_TREE' if something goes wrong, after issuing
7058 applicable error messages. */
7061 grokfndecl (tree ctype,
7065 tree orig_declarator,
7067 enum overload_flags flags,
7074 special_function_kind sfk,
7079 location_t location)
7082 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
7086 type = build_exception_variant (type, raises);
7088 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
7090 /* If we have an explicit location, use it, otherwise use whatever
7091 build_lang_decl used (probably input_location). */
7092 if (location != UNKNOWN_LOCATION)
7093 DECL_SOURCE_LOCATION (decl) = location;
7095 if (TREE_CODE (type) == METHOD_TYPE)
7098 parm = build_this_parm (type, quals);
7099 DECL_CHAIN (parm) = parms;
7102 DECL_ARGUMENTS (decl) = parms;
7103 for (t = parms; t; t = DECL_CHAIN (t))
7104 DECL_CONTEXT (t) = decl;
7105 /* Propagate volatile out from type to decl. */
7106 if (TYPE_VOLATILE (type))
7107 TREE_THIS_VOLATILE (decl) = 1;
7109 /* Setup decl according to sfk. */
7112 case sfk_constructor:
7113 case sfk_copy_constructor:
7114 case sfk_move_constructor:
7115 DECL_CONSTRUCTOR_P (decl) = 1;
7117 case sfk_destructor:
7118 DECL_DESTRUCTOR_P (decl) = 1;
7124 /* If pointers to member functions use the least significant bit to
7125 indicate whether a function is virtual, ensure a pointer
7126 to this function will have that bit clear. */
7127 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7128 && TREE_CODE (type) == METHOD_TYPE
7129 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7130 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7133 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7137 ("defining explicit specialization %qD in friend declaration",
7141 tree fns = TREE_OPERAND (orig_declarator, 0);
7142 tree args = TREE_OPERAND (orig_declarator, 1);
7144 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7146 /* Something like `template <class T> friend void f<T>()'. */
7147 error ("invalid use of template-id %qD in declaration "
7148 "of primary template",
7154 /* A friend declaration of the form friend void f<>(). Record
7155 the information in the TEMPLATE_ID_EXPR. */
7156 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7158 if (TREE_CODE (fns) == COMPONENT_REF)
7160 /* Due to bison parser ickiness, we will have already looked
7161 up an operator_name or PFUNCNAME within the current class
7162 (see template_id in parse.y). If the current class contains
7163 such a name, we'll get a COMPONENT_REF here. Undo that. */
7165 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7166 == current_class_type);
7167 fns = TREE_OPERAND (fns, 1);
7169 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7170 || TREE_CODE (fns) == OVERLOAD);
7171 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7173 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7174 if (TREE_PURPOSE (t)
7175 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7177 error ("default arguments are not allowed in declaration "
7178 "of friend template specialization %qD",
7185 error ("%<inline%> is not allowed in declaration of friend "
7186 "template specialization %qD",
7193 /* If this decl has namespace scope, set that up. */
7195 set_decl_namespace (decl, in_namespace, friendp);
7197 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7199 /* `main' and builtins have implicit 'C' linkage. */
7200 if ((MAIN_NAME_P (declarator)
7201 || (IDENTIFIER_LENGTH (declarator) > 10
7202 && IDENTIFIER_POINTER (declarator)[0] == '_'
7203 && IDENTIFIER_POINTER (declarator)[1] == '_'
7204 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7205 && current_lang_name == lang_name_cplusplus
7206 && ctype == NULL_TREE
7207 && DECL_FILE_SCOPE_P (decl))
7208 SET_DECL_LANGUAGE (decl, lang_c);
7210 /* Should probably propagate const out from type to decl I bet (mrs). */
7213 DECL_STATIC_FUNCTION_P (decl) = 1;
7214 DECL_CONTEXT (decl) = ctype;
7219 DECL_CONTEXT (decl) = ctype;
7221 check_class_member_definition_namespace (decl);
7224 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7226 if (processing_template_decl)
7227 error ("cannot declare %<::main%> to be a template");
7229 error ("cannot declare %<::main%> to be inline");
7231 error ("cannot declare %<::main%> to be static");
7236 /* Members of anonymous types and local classes have no linkage; make
7237 them internal. If a typedef is made later, this will be changed. */
7238 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7239 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7242 if (publicp && cxx_dialect == cxx98)
7244 /* [basic.link]: A name with no linkage (notably, the name of a class
7245 or enumeration declared in a local scope) shall not be used to
7246 declare an entity with linkage.
7248 DR 757 relaxes this restriction for C++0x. */
7249 t = no_linkage_check (TREE_TYPE (decl),
7250 /*relaxed_p=*/false);
7253 if (TYPE_ANONYMOUS_P (t))
7255 if (DECL_EXTERN_C_P (decl))
7256 /* Allow this; it's pretty common in C. */;
7259 permerror (input_location, "anonymous type with no linkage "
7260 "used to declare function %q#D with linkage",
7262 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7263 permerror (input_location, "%q+#D does not refer to the unqualified "
7264 "type, so it is not used for linkage",
7269 permerror (input_location, "type %qT with no linkage used to "
7270 "declare function %q#D with linkage", t, decl);
7274 TREE_PUBLIC (decl) = publicp;
7277 DECL_INTERFACE_KNOWN (decl) = 1;
7278 DECL_NOT_REALLY_EXTERN (decl) = 1;
7281 /* If the declaration was declared inline, mark it as such. */
7283 DECL_DECLARED_INLINE_P (decl) = 1;
7285 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7287 DECL_EXTERNAL (decl) = 1;
7288 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7291 ? G_("static member function %qD cannot have cv-qualifier")
7292 : G_("non-member function %qD cannot have cv-qualifier"),
7294 quals = TYPE_UNQUALIFIED;
7297 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7298 && !grok_op_properties (decl, /*complain=*/true))
7302 /* Make the init_value nonzero so pushdecl knows this is not
7303 tentative. error_mark_node is replaced later with the BLOCK. */
7304 DECL_INITIAL (decl) = error_mark_node;
7306 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7307 TREE_NOTHROW (decl) = 1;
7309 /* Caller will do the rest of this. */
7313 if (ctype != NULL_TREE)
7314 grokclassfn (ctype, decl, flags);
7316 decl = check_explicit_specialization (orig_declarator, decl,
7319 4 * (friendp != 0));
7320 if (decl == error_mark_node)
7323 if (DECL_STATIC_FUNCTION_P (decl))
7324 check_static_quals (decl, quals);
7328 cplus_decl_attributes (&decl, *attrlist, 0);
7329 *attrlist = NULL_TREE;
7332 /* Check main's type after attributes have been applied. */
7333 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7335 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7338 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7340 error ("%<::main%> must return %<int%>");
7341 newtype = build_function_type (integer_type_node, oldtypeargs);
7342 TREE_TYPE (decl) = newtype;
7345 check_main_parameter_types (decl);
7348 if (ctype != NULL_TREE
7349 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7352 tree old_decl = check_classfn (ctype, decl,
7353 (processing_template_decl
7354 > template_class_depth (ctype))
7355 ? current_template_parms
7358 if (old_decl == error_mark_node)
7366 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7367 /* Because grokfndecl is always supposed to return a
7368 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7369 here. We depend on our callers to figure out that its
7370 really a template that's being returned. */
7371 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7373 if (DECL_STATIC_FUNCTION_P (old_decl)
7374 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7376 /* Remove the `this' parm added by grokclassfn. */
7377 revert_static_member_fn (decl);
7378 check_static_quals (decl, quals);
7380 if (DECL_ARTIFICIAL (old_decl))
7382 error ("definition of implicitly-declared %qD", old_decl);
7386 /* Since we've smashed OLD_DECL to its
7387 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7388 if (TREE_CODE (decl) == TEMPLATE_DECL)
7389 decl = DECL_TEMPLATE_RESULT (decl);
7391 /* Attempt to merge the declarations. This can fail, in
7392 the case of some invalid specialization declarations. */
7393 pushed_scope = push_scope (ctype);
7394 ok = duplicate_decls (decl, old_decl, friendp);
7396 pop_scope (pushed_scope);
7399 error ("no %q#D member function declared in class %qT",
7407 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7410 if (ctype == NULL_TREE || check)
7414 DECL_VIRTUAL_P (decl) = 1;
7419 /* decl is a FUNCTION_DECL.
7420 specifiers are the parsed virt-specifiers.
7422 Set flags to reflect the virt-specifiers.
7427 set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
7429 if (decl == NULL_TREE)
7431 if (specifiers & VIRT_SPEC_OVERRIDE)
7432 DECL_OVERRIDE_P (decl) = 1;
7433 if (specifiers & VIRT_SPEC_FINAL)
7434 DECL_FINAL_P (decl) = 1;
7438 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7439 the linkage that DECL will receive in the object file. */
7442 set_linkage_for_static_data_member (tree decl)
7444 /* A static data member always has static storage duration and
7445 external linkage. Note that static data members are forbidden in
7446 local classes -- the only situation in which a class has
7447 non-external linkage. */
7448 TREE_PUBLIC (decl) = 1;
7449 TREE_STATIC (decl) = 1;
7450 /* For non-template classes, static data members are always put
7451 out in exactly those files where they are defined, just as
7452 with ordinary namespace-scope variables. */
7453 if (!processing_template_decl)
7454 DECL_INTERFACE_KNOWN (decl) = 1;
7457 /* Create a VAR_DECL named NAME with the indicated TYPE.
7459 If SCOPE is non-NULL, it is the class type or namespace containing
7460 the variable. If SCOPE is NULL, the variable should is created in
7461 the innermost enclosings scope. */
7464 grokvardecl (tree type,
7466 const cp_decl_specifier_seq *declspecs,
7472 tree explicit_scope;
7474 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7476 /* Compute the scope in which to place the variable, but remember
7477 whether or not that scope was explicitly specified by the user. */
7478 explicit_scope = scope;
7481 /* An explicit "extern" specifier indicates a namespace-scope
7483 if (declspecs->storage_class == sc_extern)
7484 scope = current_decl_namespace ();
7485 else if (!at_function_scope_p ())
7486 scope = current_scope ();
7490 && (/* If the variable is a namespace-scope variable declared in a
7491 template, we need DECL_LANG_SPECIFIC. */
7492 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7493 /* Similarly for namespace-scope variables with language linkage
7495 || (TREE_CODE (scope) == NAMESPACE_DECL
7496 && current_lang_name != lang_name_cplusplus)
7497 /* Similarly for static data members. */
7499 decl = build_lang_decl (VAR_DECL, name, type);
7501 decl = build_decl (input_location, VAR_DECL, name, type);
7503 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7504 set_decl_namespace (decl, explicit_scope, 0);
7506 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7508 if (declspecs->storage_class == sc_extern)
7510 DECL_THIS_EXTERN (decl) = 1;
7511 DECL_EXTERNAL (decl) = !initialized;
7514 if (DECL_CLASS_SCOPE_P (decl))
7516 set_linkage_for_static_data_member (decl);
7517 /* This function is only called with out-of-class definitions. */
7518 DECL_EXTERNAL (decl) = 0;
7519 check_class_member_definition_namespace (decl);
7521 /* At top level, either `static' or no s.c. makes a definition
7522 (perhaps tentative), and absence of `static' makes it public. */
7523 else if (toplevel_bindings_p ())
7525 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7526 && (DECL_THIS_EXTERN (decl) || ! constp));
7527 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7529 /* Not at top level, only `static' makes a static definition. */
7532 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7533 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7536 if (declspecs->specs[(int)ds_thread])
7537 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7539 /* If the type of the decl has no linkage, make sure that we'll
7540 notice that in mark_used. */
7541 if (cxx_dialect > cxx98
7542 && decl_linkage (decl) != lk_none
7543 && DECL_LANG_SPECIFIC (decl) == NULL
7544 && !DECL_EXTERN_C_P (decl)
7545 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7546 retrofit_lang_decl (decl);
7548 if (TREE_PUBLIC (decl))
7550 /* [basic.link]: A name with no linkage (notably, the name of a class
7551 or enumeration declared in a local scope) shall not be used to
7552 declare an entity with linkage.
7554 DR 757 relaxes this restriction for C++0x. */
7555 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7556 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7559 if (TYPE_ANONYMOUS_P (t))
7561 if (DECL_EXTERN_C_P (decl))
7562 /* Allow this; it's pretty common in C. */
7566 /* DRs 132, 319 and 389 seem to indicate types with
7567 no linkage can only be used to declare extern "C"
7568 entities. Since it's not always an error in the
7569 ISO C++ 90 Standard, we only issue a warning. */
7570 warning (0, "anonymous type with no linkage used to declare "
7571 "variable %q#D with linkage", decl);
7572 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7573 warning (0, "%q+#D does not refer to the unqualified "
7574 "type, so it is not used for linkage",
7579 warning (0, "type %qT with no linkage used to declare variable "
7580 "%q#D with linkage", t, decl);
7584 DECL_INTERFACE_KNOWN (decl) = 1;
7589 /* Create and return a canonical pointer to member function type, for
7590 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7593 build_ptrmemfunc_type (tree type)
7597 tree unqualified_variant = NULL_TREE;
7599 if (type == error_mark_node)
7602 /* If a canonical type already exists for this type, use it. We use
7603 this method instead of type_hash_canon, because it only does a
7604 simple equality check on the list of field members. */
7606 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7609 /* Make sure that we always have the unqualified pointer-to-member
7611 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7613 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7615 t = make_class_type (RECORD_TYPE);
7616 xref_basetypes (t, NULL_TREE);
7618 /* Let the front end know this is a pointer to member function... */
7619 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7620 /* ... and not really a class type. */
7621 SET_CLASS_TYPE_P (t, 0);
7623 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7626 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7628 DECL_CHAIN (field) = fields;
7631 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7633 /* Zap out the name so that the back end will give us the debugging
7634 information for this anonymous RECORD_TYPE. */
7635 TYPE_NAME (t) = NULL_TREE;
7637 /* If this is not the unqualified form of this pointer-to-member
7638 type, set the TYPE_MAIN_VARIANT for this type to be the
7639 unqualified type. Since they are actually RECORD_TYPEs that are
7640 not variants of each other, we must do this manually.
7641 As we just built a new type there is no need to do yet another copy. */
7642 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7644 int type_quals = cp_type_quals (type);
7645 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7646 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7647 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7648 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7649 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7650 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7651 TREE_TYPE (TYPE_BINFO (t)) = t;
7654 /* Cache this pointer-to-member type so that we can find it again
7656 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7658 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7659 SET_TYPE_STRUCTURAL_EQUALITY (t);
7660 else if (TYPE_CANONICAL (type) != type)
7661 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7666 /* Create and return a pointer to data member type. */
7669 build_ptrmem_type (tree class_type, tree member_type)
7671 if (TREE_CODE (member_type) == METHOD_TYPE)
7673 cp_cv_quals quals = type_memfn_quals (member_type);
7674 member_type = build_memfn_type (member_type, class_type, quals);
7675 return build_ptrmemfunc_type (build_pointer_type (member_type));
7679 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7680 return build_offset_type (class_type, member_type);
7684 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7685 Check to see that the definition is valid. Issue appropriate error
7686 messages. Return 1 if the definition is particularly bad, or 0
7690 check_static_variable_definition (tree decl, tree type)
7692 /* Can't check yet if we don't know the type. */
7693 if (dependent_type_p (type))
7695 /* If DECL is declared constexpr, we'll do the appropriate checks
7696 in check_initializer. */
7697 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7699 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7701 if (literal_type_p (type))
7702 error ("%<constexpr%> needed for in-class initialization of static "
7703 "data member %q#D of non-integral type", decl);
7705 error ("in-class initialization of static data member %q#D of "
7706 "non-literal type", decl);
7710 /* Motion 10 at San Diego: If a static const integral data member is
7711 initialized with an integral constant expression, the initializer
7712 may appear either in the declaration (within the class), or in
7713 the definition, but not both. If it appears in the class, the
7714 member is a member constant. The file-scope definition is always
7716 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7718 error ("invalid in-class initialization of static data member "
7719 "of non-integral type %qT",
7723 else if (!CP_TYPE_CONST_P (type))
7724 error ("ISO C++ forbids in-class initialization of non-const "
7725 "static member %qD",
7727 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7728 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7729 "%qD of non-integral type %qT", decl, type);
7734 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7735 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7736 expressions out into temporary variables so that walk_tree doesn't
7737 step into them (c++/15764). */
7740 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7742 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7743 tree expr = *expr_p;
7744 if (TREE_CODE (expr) == SAVE_EXPR)
7746 tree op = TREE_OPERAND (expr, 0);
7747 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7748 if (TREE_SIDE_EFFECTS (op))
7749 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7752 else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
7757 /* Entry point for the above. */
7760 stabilize_vla_size (tree size)
7762 struct pointer_set_t *pset = pointer_set_create ();
7763 /* Break out any function calls into temporary variables. */
7764 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7767 /* Given the SIZE (i.e., number of elements) in an array, compute an
7768 appropriate index type for the array. If non-NULL, NAME is the
7769 name of the thing being declared. */
7772 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7777 tree abi_1_itype = NULL_TREE;
7779 if (error_operand_p (size))
7780 return error_mark_node;
7782 type = TREE_TYPE (size);
7783 /* type_dependent_expression_p? */
7784 if (!dependent_type_p (type))
7786 mark_rvalue_use (size);
7788 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7789 && TREE_SIDE_EFFECTS (size))
7790 /* In C++98, we mark a non-constant array bound with a magic
7791 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7794 size = fold_non_dependent_expr (size);
7796 if (CLASS_TYPE_P (type)
7797 && CLASSTYPE_LITERAL_P (type))
7799 size = build_expr_type_conversion (WANT_INT, size, true);
7802 if (!(complain & tf_error))
7803 return error_mark_node;
7805 error ("size of array %qD has non-integral type %qT",
7808 error ("size of array has non-integral type %qT", type);
7809 size = integer_one_node;
7811 if (size == error_mark_node)
7812 return error_mark_node;
7813 type = TREE_TYPE (size);
7814 /* We didn't support this case in GCC 3.2, so don't bother
7815 trying to model it now in ABI v1. */
7816 abi_1_itype = error_mark_node;
7819 size = maybe_constant_value (size);
7820 if (!TREE_CONSTANT (size))
7824 if (error_operand_p (size))
7825 return error_mark_node;
7827 /* The array bound must be an integer type. */
7828 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7830 if (!(complain & tf_error))
7831 return error_mark_node;
7833 error ("size of array %qD has non-integral type %qT", name, type);
7835 error ("size of array has non-integral type %qT", type);
7836 size = integer_one_node;
7837 type = TREE_TYPE (size);
7841 /* A type is dependent if it is...an array type constructed from any
7842 dependent type or whose size is specified by a constant expression
7843 that is value-dependent. */
7844 /* We can only call value_dependent_expression_p on integral constant
7845 expressions; treat non-constant expressions as dependent, too. */
7846 if (processing_template_decl
7847 && (dependent_type_p (type)
7848 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7850 /* We cannot do any checking for a SIZE that isn't known to be
7851 constant. Just build the index type and mark that it requires
7852 structural equality checks. */
7853 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7854 size, integer_one_node));
7855 TYPE_DEPENDENT_P (itype) = 1;
7856 TYPE_DEPENDENT_P_VALID (itype) = 1;
7857 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7861 if (!abi_version_at_least (2) && processing_template_decl
7862 && abi_1_itype == NULL_TREE)
7863 /* For abi-1, we handled all instances in templates the same way,
7864 even when they were non-dependent. This affects the manglings
7865 produced. So, we do the normal checking for non-dependent
7866 sizes, but at the end we'll return the same type that abi-1
7867 would have, but with TYPE_CANONICAL set to the "right"
7868 value that the current ABI would provide. */
7869 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7870 osize, integer_one_node));
7872 /* Normally, the array-bound will be a constant. */
7873 if (TREE_CODE (size) == INTEGER_CST)
7875 /* Check to see if the array bound overflowed. Make that an
7876 error, no matter how generous we're being. */
7877 constant_expression_error (size);
7879 /* An array must have a positive number of elements. */
7880 if (INT_CST_LT (size, integer_zero_node))
7882 if (!(complain & tf_error))
7883 return error_mark_node;
7885 error ("size of array %qD is negative", name);
7887 error ("size of array is negative");
7888 size = integer_one_node;
7890 /* As an extension we allow zero-sized arrays. */
7891 else if (integer_zerop (size))
7893 if (!(complain & tf_error))
7894 /* We must fail if performing argument deduction (as
7895 indicated by the state of complain), so that
7896 another substitution can be found. */
7897 return error_mark_node;
7898 else if (in_system_header)
7899 /* Allow them in system headers because glibc uses them. */;
7901 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7903 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7906 else if (TREE_CONSTANT (size)
7907 /* We don't allow VLAs at non-function scopes, or during
7908 tentative template substitution. */
7909 || !at_function_scope_p () || !(complain & tf_error))
7911 if (!(complain & tf_error))
7912 return error_mark_node;
7913 /* `(int) &fn' is not a valid array bound. */
7915 error ("size of array %qD is not an integral constant-expression",
7918 error ("size of array is not an integral constant-expression");
7919 size = integer_one_node;
7921 else if (pedantic && warn_vla != 0)
7924 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7926 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7928 else if (warn_vla > 0)
7932 "variable length array %qD is used", name);
7935 "variable length array is used");
7938 if (processing_template_decl && !TREE_CONSTANT (size))
7939 /* A variable sized array. */
7940 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7943 HOST_WIDE_INT saved_processing_template_decl;
7945 /* Compute the index of the largest element in the array. It is
7946 one less than the number of elements in the array. We save
7947 and restore PROCESSING_TEMPLATE_DECL so that computations in
7948 cp_build_binary_op will be appropriately folded. */
7949 saved_processing_template_decl = processing_template_decl;
7950 processing_template_decl = 0;
7951 itype = cp_build_binary_op (input_location,
7953 cp_convert (ssizetype, size),
7954 cp_convert (ssizetype, integer_one_node),
7955 tf_warning_or_error);
7956 itype = fold (itype);
7957 processing_template_decl = saved_processing_template_decl;
7959 if (!TREE_CONSTANT (itype))
7960 /* A variable sized array. */
7961 itype = variable_size (itype);
7962 /* Make sure that there was no overflow when creating to a signed
7963 index type. (For example, on a 32-bit machine, an array with
7964 size 2^32 - 1 is too big.) */
7965 else if (TREE_CODE (itype) == INTEGER_CST
7966 && TREE_OVERFLOW (itype))
7968 if (!(complain & tf_error))
7969 return error_mark_node;
7970 error ("overflow in array dimension");
7971 TREE_OVERFLOW (itype) = 0;
7975 /* Create and return the appropriate index type. */
7976 if (abi_1_itype && abi_1_itype != error_mark_node)
7978 tree t = build_index_type (itype);
7979 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7980 itype = abi_1_itype;
7983 itype = build_index_type (itype);
7985 /* If the index type were dependent, we would have returned early, so
7986 remember that it isn't. */
7987 TYPE_DEPENDENT_P (itype) = 0;
7988 TYPE_DEPENDENT_P_VALID (itype) = 1;
7992 /* Returns the scope (if any) in which the entity declared by
7993 DECLARATOR will be located. If the entity was declared with an
7994 unqualified name, NULL_TREE is returned. */
7997 get_scope_of_declarator (const cp_declarator *declarator)
7999 while (declarator && declarator->kind != cdk_id)
8000 declarator = declarator->declarator;
8002 /* If the declarator-id is a SCOPE_REF, the scope in which the
8003 declaration occurs is the first operand. */
8005 && declarator->u.id.qualifying_scope)
8006 return declarator->u.id.qualifying_scope;
8008 /* Otherwise, the declarator is not a qualified name; the entity will
8009 be declared in the current scope. */
8013 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8014 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8018 create_array_type_for_decl (tree name, tree type, tree size)
8020 tree itype = NULL_TREE;
8022 /* If things have already gone awry, bail now. */
8023 if (type == error_mark_node || size == error_mark_node)
8024 return error_mark_node;
8026 /* 8.3.4/1: If the type of the identifier of D contains the auto
8027 type-specifier, the program is ill-formed. */
8028 if (pedantic && type_uses_auto (type))
8029 pedwarn (input_location, OPT_pedantic,
8030 "declaration of %qD as array of %<auto%>", name);
8032 /* If there are some types which cannot be array elements,
8033 issue an error-message and return. */
8034 switch (TREE_CODE (type))
8038 error ("declaration of %qD as array of void", name);
8040 error ("creating array of void");
8041 return error_mark_node;
8045 error ("declaration of %qD as array of functions", name);
8047 error ("creating array of functions");
8048 return error_mark_node;
8050 case REFERENCE_TYPE:
8052 error ("declaration of %qD as array of references", name);
8054 error ("creating array of references");
8055 return error_mark_node;
8059 error ("declaration of %qD as array of function members", name);
8061 error ("creating array of function members");
8062 return error_mark_node;
8070 The constant expressions that specify the bounds of the arrays
8071 can be omitted only for the first member of the sequence. */
8072 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
8075 error ("declaration of %qD as multidimensional array must "
8076 "have bounds for all dimensions except the first",
8079 error ("multidimensional array must have bounds for all "
8080 "dimensions except the first");
8082 return error_mark_node;
8085 /* Figure out the index type for the array. */
8087 itype = compute_array_index_type (name, size, tf_warning_or_error);
8090 T is called the array element type; this type shall not be [...] an
8091 abstract class type. */
8092 abstract_virtuals_error (name, type);
8094 return build_cplus_array_type (type, itype);
8097 /* Check that it's OK to declare a function with the indicated TYPE.
8098 SFK indicates the kind of special function (if any) that this
8099 function is. OPTYPE is the type given in a conversion operator
8100 declaration, or the class type for a constructor/destructor.
8101 Returns the actual return type of the function; that
8102 may be different than TYPE if an error occurs, or for certain
8103 special functions. */
8106 check_special_function_return_type (special_function_kind sfk,
8112 case sfk_constructor:
8114 error ("return type specification for constructor invalid");
8116 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8117 type = build_pointer_type (optype);
8119 type = void_type_node;
8122 case sfk_destructor:
8124 error ("return type specification for destructor invalid");
8125 /* We can't use the proper return type here because we run into
8126 problems with ambiguous bases and covariant returns.
8127 Java classes are left unchanged because (void *) isn't a valid
8128 Java type, and we don't want to change the Java ABI. */
8129 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8130 type = build_pointer_type (void_type_node);
8132 type = void_type_node;
8135 case sfk_conversion:
8137 error ("return type specified for %<operator %T%>", optype);
8148 /* A variable or data member (whose unqualified name is IDENTIFIER)
8149 has been declared with the indicated TYPE. If the TYPE is not
8150 acceptable, issue an error message and return a type to use for
8151 error-recovery purposes. */
8154 check_var_type (tree identifier, tree type)
8156 if (VOID_TYPE_P (type))
8159 error ("unnamed variable or field declared void");
8160 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8162 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8163 error ("variable or field %qE declared void", identifier);
8166 error ("variable or field declared void");
8167 type = error_mark_node;
8173 /* Given declspecs and a declarator (abstract or otherwise), determine
8174 the name and type of the object declared and construct a DECL node
8177 DECLSPECS points to the representation of declaration-specifier
8178 sequence that precedes declarator.
8180 DECL_CONTEXT says which syntactic context this declaration is in:
8181 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8182 FUNCDEF for a function definition. Like NORMAL but a few different
8183 error messages in each case. Return value may be zero meaning
8184 this definition is too screwy to try to parse.
8185 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8186 handle member functions (which have FIELD context).
8187 Return value may be zero meaning this definition is too screwy to
8189 PARM for a parameter declaration (either within a function prototype
8190 or before a function body). Make a PARM_DECL, or return void_type_node.
8191 TPARM for a template parameter declaration.
8192 CATCHPARM for a parameter declaration before a catch clause.
8193 TYPENAME if for a typename (in a cast or sizeof).
8194 Don't make a DECL node; just return the ..._TYPE node.
8195 FIELD for a struct or union field; make a FIELD_DECL.
8196 BITFIELD for a field with specified width.
8198 INITIALIZED is as for start_decl.
8200 ATTRLIST is a pointer to the list of attributes, which may be NULL
8201 if there are none; *ATTRLIST may be modified if attributes from inside
8202 the declarator should be applied to the declaration.
8204 When this function is called, scoping variables (such as
8205 CURRENT_CLASS_TYPE) should reflect the scope in which the
8206 declaration occurs, not the scope in which the new declaration will
8207 be placed. For example, on:
8211 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8214 Returns a DECL (if a declarator is present), a TYPE (if there is no
8215 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8219 grokdeclarator (const cp_declarator *declarator,
8220 const cp_decl_specifier_seq *declspecs,
8221 enum decl_context decl_context,
8225 tree type = NULL_TREE;
8227 int explicit_int128 = 0;
8228 int virtualp, explicitp, friendp, inlinep, staticp;
8229 int explicit_int = 0;
8230 int explicit_char = 0;
8231 int defaulted_int = 0;
8232 tree dependent_name = NULL_TREE;
8234 tree typedef_decl = NULL_TREE;
8235 const char *name = NULL;
8236 tree typedef_type = NULL_TREE;
8237 /* True if this declarator is a function definition. */
8238 bool funcdef_flag = false;
8239 cp_declarator_kind innermost_code = cdk_error;
8242 /* See the code below that used this. */
8243 tree decl_attr = NULL_TREE;
8246 /* Keep track of what sort of function is being processed
8247 so that we can warn about default return values, or explicit
8248 return values which do not match prescribed defaults. */
8249 special_function_kind sfk = sfk_none;
8251 tree dname = NULL_TREE;
8252 tree ctor_return_type = NULL_TREE;
8253 enum overload_flags flags = NO_SPECIAL;
8254 /* cv-qualifiers that apply to the declarator, for a declaration of
8255 a member function. */
8256 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8257 /* virt-specifiers that apply to the declarator, for a declaration of
8258 a member function. */
8259 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
8260 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8262 tree raises = NULL_TREE;
8263 int template_count = 0;
8264 tree returned_attrs = NULL_TREE;
8265 tree parms = NULL_TREE;
8266 const cp_declarator *id_declarator;
8267 /* The unqualified name of the declarator; either an
8268 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8269 tree unqualified_id;
8270 /* The class type, if any, in which this entity is located,
8271 or NULL_TREE if none. Note that this value may be different from
8272 the current class type; for example if an attempt is made to declare
8273 "A::f" inside "B", this value will be "A". */
8274 tree ctype = current_class_type;
8275 /* The NAMESPACE_DECL for the namespace in which this entity is
8276 located. If an unqualified name is used to declare the entity,
8277 this value will be NULL_TREE, even if the entity is located at
8279 tree in_namespace = NULL_TREE;
8280 cp_storage_class storage_class;
8281 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8282 bool type_was_error_mark_node = false;
8283 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8284 bool template_type_arg = false;
8285 bool template_parm_flag = false;
8286 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8289 signed_p = declspecs->specs[(int)ds_signed];
8290 unsigned_p = declspecs->specs[(int)ds_unsigned];
8291 short_p = declspecs->specs[(int)ds_short];
8292 long_p = declspecs->specs[(int)ds_long];
8293 longlong = declspecs->specs[(int)ds_long] >= 2;
8294 explicit_int128 = declspecs->explicit_int128_p;
8295 thread_p = declspecs->specs[(int)ds_thread];
8297 if (decl_context == FUNCDEF)
8298 funcdef_flag = true, decl_context = NORMAL;
8299 else if (decl_context == MEMFUNCDEF)
8300 funcdef_flag = true, decl_context = FIELD;
8301 else if (decl_context == BITFIELD)
8302 bitfield = 1, decl_context = FIELD;
8303 else if (decl_context == TEMPLATE_TYPE_ARG)
8304 template_type_arg = true, decl_context = TYPENAME;
8305 else if (decl_context == TPARM)
8306 template_parm_flag = true, decl_context = PARM;
8308 if (initialized > 1)
8309 funcdef_flag = true;
8311 /* Look inside a declarator for the name being declared
8312 and get it as a string, for an error message. */
8313 for (id_declarator = declarator;
8315 id_declarator = id_declarator->declarator)
8317 if (id_declarator->kind != cdk_id)
8318 innermost_code = id_declarator->kind;
8320 switch (id_declarator->kind)
8323 if (id_declarator->declarator
8324 && id_declarator->declarator->kind == cdk_id)
8326 sfk = id_declarator->declarator->u.id.sfk;
8327 if (sfk == sfk_destructor)
8334 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8335 tree decl = id_declarator->u.id.unqualified_name;
8338 if (qualifying_scope)
8340 if (at_function_scope_p ())
8344 A declarator-id shall not be qualified except
8347 None of the cases are permitted in block
8349 if (qualifying_scope == global_namespace)
8350 error ("invalid use of qualified-name %<::%D%>",
8352 else if (TYPE_P (qualifying_scope))
8353 error ("invalid use of qualified-name %<%T::%D%>",
8354 qualifying_scope, decl);
8356 error ("invalid use of qualified-name %<%D::%D%>",
8357 qualifying_scope, decl);
8358 return error_mark_node;
8360 else if (TYPE_P (qualifying_scope))
8362 ctype = qualifying_scope;
8363 if (!MAYBE_CLASS_TYPE_P (ctype))
8365 error ("%q#T is not a class or a namespace", ctype);
8368 else if (innermost_code != cdk_function
8369 && current_class_type
8370 && !UNIQUELY_DERIVED_FROM_P (ctype,
8371 current_class_type))
8373 error ("type %qT is not derived from type %qT",
8374 ctype, current_class_type);
8375 return error_mark_node;
8378 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8379 in_namespace = qualifying_scope;
8381 switch (TREE_CODE (decl))
8387 if (innermost_code != cdk_function)
8389 error ("declaration of %qD as non-function", decl);
8390 return error_mark_node;
8392 else if (!qualifying_scope
8393 && !(current_class_type && at_class_scope_p ()))
8395 error ("declaration of %qD as non-member", decl);
8396 return error_mark_node;
8399 type = TREE_OPERAND (decl, 0);
8401 type = constructor_name (type);
8402 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8407 case TEMPLATE_ID_EXPR:
8409 tree fns = TREE_OPERAND (decl, 0);
8412 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8414 gcc_assert (is_overloaded_fn (dname));
8415 dname = DECL_NAME (get_first_fn (dname));
8420 case IDENTIFIER_NODE:
8421 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8424 if (C_IS_RESERVED_WORD (dname))
8426 error ("declarator-id missing; using reserved word %qD",
8428 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8430 else if (!IDENTIFIER_TYPENAME_P (dname))
8431 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8434 gcc_assert (flags == NO_SPECIAL);
8435 flags = TYPENAME_FLAG;
8436 ctor_return_type = TREE_TYPE (dname);
8437 sfk = sfk_conversion;
8438 if (is_typename_at_global_scope (dname))
8439 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8441 name = "<invalid operator>";
8458 return error_mark_node;
8463 if (id_declarator->kind == cdk_id)
8469 The declarator in a function-definition shall have the form
8470 D1 ( parameter-declaration-clause) ... */
8471 if (funcdef_flag && innermost_code != cdk_function)
8473 error ("function definition does not declare parameters");
8474 return error_mark_node;
8477 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8478 && innermost_code != cdk_function
8479 && ! (ctype && !declspecs->any_specifiers_p))
8481 error ("declaration of %qD as non-function", dname);
8482 return error_mark_node;
8485 if (dname && IDENTIFIER_OPNAME_P (dname))
8487 if (declspecs->specs[(int)ds_typedef])
8489 error ("declaration of %qD as %<typedef%>", dname);
8490 return error_mark_node;
8492 else if (decl_context == PARM || decl_context == CATCHPARM)
8494 error ("declaration of %qD as parameter", dname);
8495 return error_mark_node;
8499 /* Anything declared one level down from the top level
8500 must be one of the parameters of a function
8501 (because the body is at least two levels down). */
8503 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8504 by not allowing C++ class definitions to specify their parameters
8505 with xdecls (must be spec.d in the parmlist).
8507 Since we now wait to push a class scope until we are sure that
8508 we are in a legitimate method context, we must set oldcname
8509 explicitly (since current_class_name is not yet alive).
8511 We also want to avoid calling this a PARM if it is in a namespace. */
8513 if (decl_context == NORMAL && !toplevel_bindings_p ())
8515 cp_binding_level *b = current_binding_level;
8516 current_binding_level = b->level_chain;
8517 if (current_binding_level != 0 && toplevel_bindings_p ())
8518 decl_context = PARM;
8519 current_binding_level = b;
8523 name = decl_context == PARM ? "parameter" : "type name";
8525 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8527 error ("%<constexpr%> cannot appear in a typedef declaration");
8528 return error_mark_node;
8531 /* If there were multiple types specified in the decl-specifier-seq,
8532 issue an error message. */
8533 if (declspecs->multiple_types_p)
8535 error ("two or more data types in declaration of %qs", name);
8536 return error_mark_node;
8539 if (declspecs->conflicting_specifiers_p)
8541 error ("conflicting specifiers in declaration of %qs", name);
8542 return error_mark_node;
8545 /* Extract the basic type from the decl-specifier-seq. */
8546 type = declspecs->type;
8547 if (type == error_mark_node)
8550 type_was_error_mark_node = true;
8552 /* If the entire declaration is itself tagged as deprecated then
8553 suppress reports of deprecated items. */
8554 if (type && TREE_DEPRECATED (type)
8555 && deprecated_state != DEPRECATED_SUPPRESS)
8556 warn_deprecated_use (type, NULL_TREE);
8557 if (type && TREE_CODE (type) == TYPE_DECL)
8559 typedef_decl = type;
8560 type = TREE_TYPE (typedef_decl);
8561 if (TREE_DEPRECATED (type)
8562 && DECL_ARTIFICIAL (typedef_decl)
8563 && deprecated_state != DEPRECATED_SUPPRESS)
8564 warn_deprecated_use (type, NULL_TREE);
8566 /* No type at all: default to `int', and set DEFAULTED_INT
8567 because it was not a user-defined typedef. */
8568 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8570 /* These imply 'int'. */
8571 type = integer_type_node;
8575 explicit_int = declspecs->explicit_int_p;
8576 explicit_char = declspecs->explicit_char_p;
8579 /* See the code below that used this. */
8581 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8583 typedef_type = type;
8586 if (sfk != sfk_conversion)
8587 ctor_return_type = ctype;
8589 if (sfk != sfk_none)
8590 type = check_special_function_return_type (sfk, type,
8592 else if (type == NULL_TREE)
8598 /* We handle `main' specially here, because 'main () { }' is so
8599 common. With no options, it is allowed. With -Wreturn-type,
8600 it is a warning. It is only an error with -pedantic-errors. */
8601 is_main = (funcdef_flag
8602 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8603 && MAIN_NAME_P (dname)
8604 && ctype == NULL_TREE
8605 && in_namespace == NULL_TREE
8606 && current_namespace == global_namespace);
8608 if (type_was_error_mark_node)
8609 /* We've already issued an error, don't complain more. */;
8610 else if (in_system_header || flag_ms_extensions)
8611 /* Allow it, sigh. */;
8613 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8615 pedwarn (input_location, OPT_pedantic,
8616 "ISO C++ forbids declaration of %qs with no type", name);
8618 warning (OPT_Wreturn_type,
8619 "ISO C++ forbids declaration of %qs with no type", name);
8621 type = integer_type_node;
8626 /* Now process the modifiers that were specified
8627 and check for invalid combinations. */
8629 /* Long double is a special combination. */
8630 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8633 type = cp_build_qualified_type (long_double_type_node,
8634 cp_type_quals (type));
8637 /* Check all other uses of type modifiers. */
8639 if (unsigned_p || signed_p || long_p || short_p)
8643 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8644 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8645 else if (signed_p && unsigned_p)
8646 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8647 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8648 error ("%<long long%> invalid for %qs", name);
8649 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8650 error ("%<__int128%> invalid for %qs", name);
8651 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8652 error ("%<long%> invalid for %qs", name);
8653 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8654 error ("%<short%> invalid for %qs", name);
8655 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8656 error ("%<long%> or %<short%> invalid for %qs", name);
8657 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8658 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8659 else if ((long_p || short_p) && explicit_char)
8660 error ("%<long%> or %<short%> specified with char for %qs", name);
8661 else if (long_p && short_p)
8662 error ("%<long%> and %<short%> specified together for %qs", name);
8663 else if (type == char16_type_node || type == char32_type_node)
8665 if (signed_p || unsigned_p)
8666 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8667 else if (short_p || long_p)
8668 error ("%<short%> or %<long%> invalid for %qs", name);
8673 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8675 pedwarn (input_location, OPT_pedantic,
8676 "long, short, signed or unsigned used invalidly for %qs",
8678 if (flag_pedantic_errors)
8681 if (explicit_int128)
8683 if (int128_integer_type_node == NULL_TREE)
8685 error ("%<__int128%> is not supported by this target");
8690 pedwarn (input_location, OPT_pedantic,
8691 "ISO C++ does not support %<__int128%> for %qs",
8693 if (flag_pedantic_errors)
8699 /* Discard the type modifiers if they are invalid. */
8707 explicit_int128 = false;
8711 /* Decide whether an integer type is signed or not.
8712 Optionally treat bitfields as signed by default. */
8716 It is implementation-defined whether a plain (neither
8717 explicitly signed or unsigned) char, short, int, or long
8718 bit-field is signed or unsigned.
8720 Naturally, we extend this to long long as well. Note that
8721 this does not include wchar_t. */
8722 || (bitfield && !flag_signed_bitfields
8724 /* A typedef for plain `int' without `signed' can be
8725 controlled just like plain `int', but a typedef for
8726 `signed int' cannot be so controlled. */
8728 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8729 && TREE_CODE (type) == INTEGER_TYPE
8730 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8732 if (explicit_int128)
8733 type = int128_unsigned_type_node;
8735 type = long_long_unsigned_type_node;
8737 type = long_unsigned_type_node;
8739 type = short_unsigned_type_node;
8740 else if (type == char_type_node)
8741 type = unsigned_char_type_node;
8742 else if (typedef_decl)
8743 type = unsigned_type_for (type);
8745 type = unsigned_type_node;
8747 else if (signed_p && type == char_type_node)
8748 type = signed_char_type_node;
8749 else if (explicit_int128)
8750 type = int128_integer_type_node;
8752 type = long_long_integer_type_node;
8754 type = long_integer_type_node;
8756 type = short_integer_type_node;
8758 if (declspecs->specs[(int)ds_complex])
8760 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8761 error ("complex invalid for %qs", name);
8762 /* If we just have "complex", it is equivalent to
8763 "complex double", but if any modifiers at all are specified it is
8764 the complex form of TYPE. E.g, "complex short" is
8765 "complex short int". */
8766 else if (defaulted_int && ! longlong && ! explicit_int128
8767 && ! (long_p || short_p || signed_p || unsigned_p))
8768 type = complex_double_type_node;
8769 else if (type == integer_type_node)
8770 type = complex_integer_type_node;
8771 else if (type == float_type_node)
8772 type = complex_float_type_node;
8773 else if (type == double_type_node)
8774 type = complex_double_type_node;
8775 else if (type == long_double_type_node)
8776 type = complex_long_double_type_node;
8778 type = build_complex_type (type);
8781 type_quals = TYPE_UNQUALIFIED;
8782 if (declspecs->specs[(int)ds_const])
8783 type_quals |= TYPE_QUAL_CONST;
8784 if (declspecs->specs[(int)ds_volatile])
8785 type_quals |= TYPE_QUAL_VOLATILE;
8786 if (declspecs->specs[(int)ds_restrict])
8787 type_quals |= TYPE_QUAL_RESTRICT;
8788 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8789 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8792 type_quals |= cp_type_quals (type);
8793 type = cp_build_qualified_type_real
8794 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8795 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8796 /* We might have ignored or rejected some of the qualifiers. */
8797 type_quals = cp_type_quals (type);
8800 inlinep = !! declspecs->specs[(int)ds_inline];
8801 virtualp = !! declspecs->specs[(int)ds_virtual];
8802 explicitp = !! declspecs->specs[(int)ds_explicit];
8804 storage_class = declspecs->storage_class;
8805 if (storage_class == sc_static)
8806 staticp = 1 + (decl_context == FIELD);
8808 if (virtualp && staticp == 2)
8810 error ("member %qD cannot be declared both virtual and static", dname);
8811 storage_class = sc_none;
8814 friendp = !! declspecs->specs[(int)ds_friend];
8816 if (dependent_name && !friendp)
8818 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8819 return error_mark_node;
8822 /* Issue errors about use of storage classes for parameters. */
8823 if (decl_context == PARM)
8825 if (declspecs->specs[(int)ds_typedef])
8827 error ("typedef declaration invalid in parameter declaration");
8828 return error_mark_node;
8830 else if (template_parm_flag && storage_class != sc_none)
8832 error ("storage class specified for template parameter %qs", name);
8833 return error_mark_node;
8835 else if (storage_class == sc_static
8836 || storage_class == sc_extern
8838 error ("storage class specifiers invalid in parameter declarations");
8840 /* Function parameters cannot be constexpr. If we saw one, moan
8841 and pretend it wasn't there. */
8844 error ("a parameter cannot be declared %<constexpr%>");
8849 /* Give error if `virtual' is used outside of class declaration. */
8851 && (current_class_name == NULL_TREE || decl_context != FIELD))
8853 error ("%<virtual%> outside class declaration");
8857 /* Static anonymous unions are dealt with here. */
8858 if (staticp && decl_context == TYPENAME
8860 && ANON_AGGR_TYPE_P (declspecs->type))
8861 decl_context = FIELD;
8863 /* Warn about storage classes that are invalid for certain
8864 kinds of declarations (parameters, typenames, etc.). */
8867 && storage_class != sc_extern
8868 && storage_class != sc_static)
8869 || declspecs->specs[(int)ds_typedef]))
8871 error ("multiple storage classes in declaration of %qs", name);
8874 if (decl_context != NORMAL
8875 && ((storage_class != sc_none
8876 && storage_class != sc_mutable)
8879 if ((decl_context == PARM || decl_context == CATCHPARM)
8880 && (storage_class == sc_register
8881 || storage_class == sc_auto))
8883 else if (declspecs->specs[(int)ds_typedef])
8885 else if (decl_context == FIELD
8886 /* C++ allows static class elements. */
8887 && storage_class == sc_static)
8888 /* C++ also allows inlines and signed and unsigned elements,
8889 but in those cases we don't come in here. */
8893 if (decl_context == FIELD)
8894 error ("storage class specified for %qs", name);
8897 if (decl_context == PARM || decl_context == CATCHPARM)
8898 error ("storage class specified for parameter %qs", name);
8900 error ("storage class specified for typename");
8902 if (storage_class == sc_register
8903 || storage_class == sc_auto
8904 || storage_class == sc_extern
8906 storage_class = sc_none;
8909 else if (storage_class == sc_extern && funcdef_flag
8910 && ! toplevel_bindings_p ())
8911 error ("nested function %qs declared %<extern%>", name);
8912 else if (toplevel_bindings_p ())
8914 if (storage_class == sc_auto)
8915 error ("top-level declaration of %qs specifies %<auto%>", name);
8918 && storage_class != sc_extern
8919 && storage_class != sc_static)
8921 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8926 if (storage_class && friendp)
8928 error ("storage class specifiers invalid in friend function declarations");
8929 storage_class = sc_none;
8934 unqualified_id = NULL_TREE;
8937 unqualified_id = id_declarator->u.id.unqualified_name;
8938 switch (TREE_CODE (unqualified_id))
8941 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8942 if (TYPE_P (unqualified_id))
8943 unqualified_id = constructor_name (unqualified_id);
8946 case IDENTIFIER_NODE:
8947 case TEMPLATE_ID_EXPR:
8955 /* Determine the type of the entity declared by recurring on the
8957 for (; declarator; declarator = declarator->declarator)
8959 const cp_declarator *inner_declarator;
8962 if (type == error_mark_node)
8963 return error_mark_node;
8965 attrs = declarator->attributes;
8971 if (declarator == NULL || declarator->kind == cdk_id)
8972 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8973 if (declarator->kind == cdk_function)
8974 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8975 if (declarator->kind == cdk_array)
8976 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8977 returned_attrs = decl_attributes (&type,
8978 chainon (returned_attrs, attrs),
8982 if (declarator->kind == cdk_id)
8985 inner_declarator = declarator->declarator;
8987 switch (declarator->kind)
8990 type = create_array_type_for_decl (dname, type,
8991 declarator->u.array.bounds);
8999 /* Declaring a function type.
9000 Make sure we have a valid type for the function to return. */
9002 if (type_quals != TYPE_UNQUALIFIED)
9004 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
9005 warning (OPT_Wignored_qualifiers,
9006 "type qualifiers ignored on function return type");
9007 /* We now know that the TYPE_QUALS don't apply to the
9008 decl, but to its return type. */
9009 type_quals = TYPE_UNQUALIFIED;
9011 errmsg = targetm.invalid_return_type (type);
9015 type = integer_type_node;
9018 /* Error about some types functions can't return. */
9020 if (TREE_CODE (type) == FUNCTION_TYPE)
9022 error ("%qs declared as function returning a function", name);
9023 return error_mark_node;
9025 if (TREE_CODE (type) == ARRAY_TYPE)
9027 error ("%qs declared as function returning an array", name);
9028 return error_mark_node;
9031 /* Pick up type qualifiers which should be applied to `this'. */
9032 memfn_quals = declarator->u.function.qualifiers;
9033 /* Pick up virt-specifiers. */
9034 virt_specifiers = declarator->u.function.virt_specifiers;
9035 /* Pick up the exception specifications. */
9036 raises = declarator->u.function.exception_specification;
9038 /* Say it's a definition only for the CALL_EXPR
9039 closest to the identifier. */
9040 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
9042 /* Handle a late-specified return type. */
9045 if (type_uses_auto (type))
9047 if (!declarator->u.function.late_return_type)
9049 error ("%qs function uses %<auto%> type specifier without"
9050 " late return type", name);
9051 return error_mark_node;
9053 else if (!is_auto (type))
9055 error ("%qs function with late return type has"
9056 " %qT as its type rather than plain %<auto%>",
9058 return error_mark_node;
9061 else if (declarator->u.function.late_return_type)
9063 error ("%qs function with late return type not declared"
9064 " with %<auto%> type specifier", name);
9065 return error_mark_node;
9068 type = splice_late_return_type
9069 (type, declarator->u.function.late_return_type);
9070 if (type == error_mark_node)
9071 return error_mark_node;
9073 if (ctype == NULL_TREE
9074 && decl_context == FIELD
9076 && (friendp == 0 || dname == current_class_name))
9077 ctype = current_class_type;
9079 if (ctype && (sfk == sfk_constructor
9080 || sfk == sfk_destructor))
9082 /* We are within a class's scope. If our declarator name
9083 is the same as the class name, and we are defining
9084 a function, then it is a constructor/destructor, and
9085 therefore returns a void type. */
9087 /* ISO C++ 12.4/2. A destructor may not be declared
9088 const or volatile. A destructor may not be
9091 ISO C++ 12.1. A constructor may not be declared
9092 const or volatile. A constructor may not be
9093 virtual. A constructor may not be static. */
9095 error ((flags == DTOR_FLAG)
9096 ? "destructor cannot be static member function"
9097 : "constructor cannot be static member function");
9100 error ((flags == DTOR_FLAG)
9101 ? "destructors may not be cv-qualified"
9102 : "constructors may not be cv-qualified");
9103 memfn_quals = TYPE_UNQUALIFIED;
9106 if (decl_context == FIELD
9107 && !member_function_or_else (ctype,
9110 return error_mark_node;
9112 if (flags != DTOR_FLAG)
9114 /* It's a constructor. */
9119 permerror (input_location, "constructors cannot be declared virtual");
9122 if (decl_context == FIELD
9123 && sfk != sfk_constructor)
9124 return error_mark_node;
9126 if (decl_context == FIELD)
9132 error ("can%'t initialize friend function %qs", name);
9135 /* Cannot be both friend and virtual. */
9136 error ("virtual functions cannot be friends");
9139 if (decl_context == NORMAL)
9140 error ("friend declaration not in class definition");
9141 if (current_function_decl && funcdef_flag)
9142 error ("can%'t define friend function %qs in a local "
9146 else if (ctype && sfk == sfk_conversion)
9150 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
9155 arg_types = grokparms (declarator->u.function.parameters,
9158 if (inner_declarator
9159 && inner_declarator->kind == cdk_id
9160 && inner_declarator->u.id.sfk == sfk_destructor
9161 && arg_types != void_list_node)
9163 error ("destructors may not have parameters");
9164 arg_types = void_list_node;
9168 type = build_function_type (type, arg_types);
9175 /* Filter out pointers-to-references and references-to-references.
9176 We can get these if a TYPE_DECL is used. */
9178 if (TREE_CODE (type) == REFERENCE_TYPE)
9180 if (declarator->kind != cdk_reference)
9182 error ("cannot declare pointer to %q#T", type);
9183 type = TREE_TYPE (type);
9186 /* In C++0x, we allow reference to reference declarations
9187 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9188 and template type arguments [14.3.1/4 temp.arg.type]. The
9189 check for direct reference to reference declarations, which
9190 are still forbidden, occurs below. Reasoning behind the change
9191 can be found in DR106, DR540, and the rvalue reference
9193 else if (cxx_dialect == cxx98)
9195 error ("cannot declare reference to %q#T", type);
9196 type = TREE_TYPE (type);
9199 else if (VOID_TYPE_P (type))
9201 if (declarator->kind == cdk_reference)
9202 error ("cannot declare reference to %q#T", type);
9203 else if (declarator->kind == cdk_ptrmem)
9204 error ("cannot declare pointer to %q#T member", type);
9207 /* We now know that the TYPE_QUALS don't apply to the decl,
9208 but to the target of the pointer. */
9209 type_quals = TYPE_UNQUALIFIED;
9211 if (declarator->kind == cdk_ptrmem
9212 && (TREE_CODE (type) == FUNCTION_TYPE
9213 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9215 memfn_quals |= type_memfn_quals (type);
9216 type = build_memfn_type (type,
9217 declarator->u.pointer.class_type,
9219 if (type == error_mark_node)
9220 return error_mark_node;
9221 memfn_quals = TYPE_UNQUALIFIED;
9224 if (TREE_CODE (type) == FUNCTION_TYPE
9225 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9226 error (declarator->kind == cdk_reference
9227 ? G_("cannot declare reference to qualified function type %qT")
9228 : G_("cannot declare pointer to qualified function type %qT"),
9231 /* When the pointed-to type involves components of variable size,
9232 care must be taken to ensure that the size evaluation code is
9233 emitted early enough to dominate all the possible later uses
9234 and late enough for the variables on which it depends to have
9237 This is expected to happen automatically when the pointed-to
9238 type has a name/declaration of it's own, but special attention
9239 is required if the type is anonymous.
9241 We handle the NORMAL and FIELD contexts here by inserting a
9242 dummy statement that just evaluates the size at a safe point
9243 and ensures it is not deferred until e.g. within a deeper
9244 conditional context (c++/43555).
9246 We expect nothing to be needed here for PARM or TYPENAME.
9247 Evaluating the size at this point for TYPENAME would
9248 actually be incorrect, as we might be in the middle of an
9249 expression with side effects on the pointed-to type size
9250 "arguments" prior to the pointer declaration point and the
9251 size evaluation could end up prior to the side effects. */
9253 if (!TYPE_NAME (type)
9254 && (decl_context == NORMAL || decl_context == FIELD)
9255 && at_function_scope_p ()
9256 && variably_modified_type_p (type, NULL_TREE))
9258 /* First break out any side-effects. */
9259 stabilize_vla_size (TYPE_SIZE (type));
9260 /* And then force evaluation of the SAVE_EXPR. */
9261 finish_expr_stmt (TYPE_SIZE (type));
9264 if (declarator->kind == cdk_reference)
9266 /* In C++0x, the type we are creating a reference to might be
9267 a typedef which is itself a reference type. In that case,
9268 we follow the reference collapsing rules in
9269 [7.1.3/8 dcl.typedef] to create the final reference type:
9271 "If a typedef TD names a type that is a reference to a type
9272 T, an attempt to create the type 'lvalue reference to cv TD'
9273 creates the type 'lvalue reference to T,' while an attempt
9274 to create the type "rvalue reference to cv TD' creates the
9277 if (VOID_TYPE_P (type))
9278 /* We already gave an error. */;
9279 else if (TREE_CODE (type) == REFERENCE_TYPE)
9281 if (declarator->u.reference.rvalue_ref)
9282 /* Leave type alone. */;
9284 type = cp_build_reference_type (TREE_TYPE (type), false);
9287 type = cp_build_reference_type
9288 (type, declarator->u.reference.rvalue_ref);
9290 /* In C++0x, we need this check for direct reference to
9291 reference declarations, which are forbidden by
9292 [8.3.2/5 dcl.ref]. Reference to reference declarations
9293 are only allowed indirectly through typedefs and template
9294 type arguments. Example:
9296 void foo(int & &); // invalid ref-to-ref decl
9298 typedef int & int_ref;
9299 void foo(int_ref &); // valid ref-to-ref decl
9301 if (inner_declarator && inner_declarator->kind == cdk_reference)
9302 error ("cannot declare reference to %q#T, which is not "
9303 "a typedef or a template type argument", type);
9305 else if (TREE_CODE (type) == METHOD_TYPE)
9306 type = build_ptrmemfunc_type (build_pointer_type (type));
9307 else if (declarator->kind == cdk_ptrmem)
9309 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9311 if (declarator->u.pointer.class_type == error_mark_node)
9312 /* We will already have complained. */
9313 type = error_mark_node;
9315 type = build_ptrmem_type (declarator->u.pointer.class_type,
9319 type = build_pointer_type (type);
9321 /* Process a list of type modifier keywords (such as
9322 const or volatile) that were given inside the `*' or `&'. */
9324 if (declarator->u.pointer.qualifiers)
9327 = cp_build_qualified_type (type,
9328 declarator->u.pointer.qualifiers);
9329 type_quals = cp_type_quals (type);
9342 /* We need to stabilize side-effects in VLA sizes for regular array
9343 declarations too, not just pointers to arrays. */
9344 if (type != error_mark_node && !TYPE_NAME (type)
9345 && (decl_context == NORMAL || decl_context == FIELD)
9346 && at_function_scope_p ()
9347 && variably_modified_type_p (type, NULL_TREE))
9348 stabilize_vla_size (TYPE_SIZE (type));
9350 /* A `constexpr' specifier used in an object declaration declares
9351 the object as `const'. */
9352 if (constexpr_p && innermost_code != cdk_function)
9354 if (type_quals & TYPE_QUAL_CONST)
9355 error ("both %<const%> and %<constexpr%> cannot be used here");
9356 if (type_quals & TYPE_QUAL_VOLATILE)
9357 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9358 if (TREE_CODE (type) != REFERENCE_TYPE)
9360 type_quals |= TYPE_QUAL_CONST;
9361 type = cp_build_qualified_type (type, type_quals);
9365 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9366 && TREE_CODE (type) != FUNCTION_TYPE
9367 && TREE_CODE (type) != METHOD_TYPE)
9369 error ("template-id %qD used as a declarator",
9371 unqualified_id = dname;
9374 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9375 qualified with a class-name, turn it into a METHOD_TYPE, unless
9376 we know that the function is static. We take advantage of this
9377 opportunity to do other processing that pertains to entities
9378 explicitly declared to be class members. Note that if DECLARATOR
9379 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9380 would not have exited the loop above. */
9382 && declarator->u.id.qualifying_scope
9383 && MAYBE_CLASS_TYPE_P (declarator->u.id.qualifying_scope))
9387 ctype = declarator->u.id.qualifying_scope;
9388 ctype = TYPE_MAIN_VARIANT (ctype);
9390 while (t != NULL_TREE && CLASS_TYPE_P (t))
9392 /* You're supposed to have one `template <...>' for every
9393 template class, but you don't need one for a full
9394 specialization. For example:
9396 template <class T> struct S{};
9397 template <> struct S<int> { void f(); };
9398 void S<int>::f () {}
9400 is correct; there shouldn't be a `template <>' for the
9401 definition of `S<int>::f'. */
9402 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9403 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9404 /* T is an explicit (not partial) specialization. All
9405 containing classes must therefore also be explicitly
9408 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9409 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9410 template_count += 1;
9412 t = TYPE_MAIN_DECL (t);
9413 t = DECL_CONTEXT (t);
9416 if (ctype == current_class_type)
9420 permerror (input_location, "member functions are implicitly friends of their class");
9424 permerror (declarator->id_loc,
9425 "extra qualification %<%T::%> on member %qs",
9428 else if (/* If the qualifying type is already complete, then we
9429 can skip the following checks. */
9430 !COMPLETE_TYPE_P (ctype)
9431 && (/* If the function is being defined, then
9432 qualifying type must certainly be complete. */
9434 /* A friend declaration of "T::f" is OK, even if
9435 "T" is a template parameter. But, if this
9436 function is not a friend, the qualifying type
9438 || (!friendp && !CLASS_TYPE_P (ctype))
9439 /* For a declaration, the type need not be
9440 complete, if either it is dependent (since there
9441 is no meaningful definition of complete in that
9442 case) or the qualifying class is currently being
9444 || !(dependent_type_p (ctype)
9445 || currently_open_class (ctype)))
9446 /* Check that the qualifying type is complete. */
9447 && !complete_type_or_else (ctype, NULL_TREE))
9448 return error_mark_node;
9449 else if (TREE_CODE (type) == FUNCTION_TYPE)
9451 if (current_class_type
9452 && (!friendp || funcdef_flag))
9455 ? "cannot define member function %<%T::%s%> within %<%T%>"
9456 : "cannot declare member function %<%T::%s%> within %<%T%>",
9457 ctype, name, current_class_type);
9458 return error_mark_node;
9461 else if (declspecs->specs[(int)ds_typedef]
9462 && current_class_type)
9464 error ("cannot declare member %<%T::%s%> within %qT",
9465 ctype, name, current_class_type);
9466 return error_mark_node;
9470 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9471 ctype = current_class_type;
9473 /* Now TYPE has the actual type. */
9478 *attrlist = chainon (returned_attrs, *attrlist);
9480 attrlist = &returned_attrs;
9483 /* Handle parameter packs. */
9484 if (parameter_pack_p)
9486 if (decl_context == PARM)
9487 /* Turn the type into a pack expansion.*/
9488 type = make_pack_expansion (type);
9490 error ("non-parameter %qs cannot be a parameter pack", name);
9493 /* Did array size calculations overflow? */
9495 if (TREE_CODE (type) == ARRAY_TYPE
9496 && COMPLETE_TYPE_P (type)
9497 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9498 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9500 error ("size of array %qs is too large", name);
9501 /* If we proceed with the array type as it is, we'll eventually
9502 crash in tree_low_cst(). */
9503 type = error_mark_node;
9506 if ((decl_context == FIELD || decl_context == PARM)
9507 && !processing_template_decl
9508 && variably_modified_type_p (type, NULL_TREE))
9510 if (decl_context == FIELD)
9511 error ("data member may not have variably modified type %qT", type);
9513 error ("parameter may not have variably modified type %qT", type);
9514 type = error_mark_node;
9517 if (explicitp == 1 || (explicitp && friendp))
9519 /* [dcl.fct.spec] The explicit specifier shall only be used in
9520 declarations of constructors within a class definition. */
9521 error ("only declarations of constructors can be %<explicit%>");
9525 if (storage_class == sc_mutable)
9527 if (decl_context != FIELD || friendp)
9529 error ("non-member %qs cannot be declared %<mutable%>", name);
9530 storage_class = sc_none;
9532 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9534 error ("non-object member %qs cannot be declared %<mutable%>", name);
9535 storage_class = sc_none;
9537 else if (TREE_CODE (type) == FUNCTION_TYPE
9538 || TREE_CODE (type) == METHOD_TYPE)
9540 error ("function %qs cannot be declared %<mutable%>", name);
9541 storage_class = sc_none;
9545 error ("static %qs cannot be declared %<mutable%>", name);
9546 storage_class = sc_none;
9548 else if (type_quals & TYPE_QUAL_CONST)
9550 error ("const %qs cannot be declared %<mutable%>", name);
9551 storage_class = sc_none;
9553 else if (TREE_CODE (type) == REFERENCE_TYPE)
9555 permerror (input_location, "reference %qs cannot be declared "
9556 "%<mutable%>", name);
9557 storage_class = sc_none;
9561 /* If this is declaring a typedef name, return a TYPE_DECL. */
9562 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9566 /* Note that the grammar rejects storage classes
9567 in typenames, fields or parameters. */
9568 if (current_lang_name == lang_name_java)
9569 TYPE_FOR_JAVA (type) = 1;
9571 /* This declaration:
9573 typedef void f(int) const;
9575 declares a function type which is not a member of any
9576 particular class, but which is cv-qualified; for
9577 example "f S::*" declares a pointer to a const-qualified
9578 member function of S. We record the cv-qualification in the
9580 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9582 type = apply_memfn_quals (type, memfn_quals);
9584 /* We have now dealt with these qualifiers. */
9585 memfn_quals = TYPE_UNQUALIFIED;
9588 if (type_uses_auto (type))
9590 error ("typedef declared %<auto%>");
9591 type = error_mark_node;
9594 if (decl_context == FIELD)
9595 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9597 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9598 if (id_declarator && declarator->u.id.qualifying_scope) {
9599 error_at (DECL_SOURCE_LOCATION (decl),
9600 "typedef name may not be a nested-name-specifier");
9601 TREE_TYPE (decl) = error_mark_node;
9604 if (decl_context != FIELD)
9606 if (!current_function_decl)
9607 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9608 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9609 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9610 (current_function_decl)))
9611 /* The TYPE_DECL is "abstract" because there will be
9612 clones of this constructor/destructor, and there will
9613 be copies of this TYPE_DECL generated in those
9615 DECL_ABSTRACT (decl) = 1;
9617 else if (constructor_name_p (unqualified_id, current_class_type))
9618 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9619 "as enclosing class",
9622 /* If the user declares "typedef struct {...} foo" then the
9623 struct will have an anonymous name. Fill that name in now.
9624 Nothing can refer to it, so nothing needs know about the name
9626 if (type != error_mark_node
9629 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9630 && TYPE_ANONYMOUS_P (type)
9631 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9635 /* Replace the anonymous name with the real name everywhere. */
9636 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9638 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9639 /* We do not rename the debug info representing the
9640 anonymous tagged type because the standard says in
9641 [dcl.typedef] that the naming applies only for
9642 linkage purposes. */
9643 /*debug_hooks->set_name (t, decl);*/
9644 TYPE_NAME (t) = decl;
9647 if (TYPE_LANG_SPECIFIC (type))
9648 TYPE_WAS_ANONYMOUS (type) = 1;
9650 /* If this is a typedef within a template class, the nested
9651 type is a (non-primary) template. The name for the
9652 template needs updating as well. */
9653 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9654 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9655 = TYPE_IDENTIFIER (type);
9657 /* Adjust linkage now that we aren't anonymous anymore. */
9658 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9659 determine_visibility (TYPE_MAIN_DECL (type));
9661 /* FIXME remangle member functions; member functions of a
9662 type with external linkage have external linkage. */
9666 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9667 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9669 bad_specifiers (decl, BSP_TYPE, virtualp,
9670 memfn_quals != TYPE_UNQUALIFIED,
9671 inlinep, friendp, raises != NULL_TREE);
9676 /* Detect the case of an array type of unspecified size
9677 which came, as such, direct from a typedef name.
9678 We must copy the type, so that the array's domain can be
9679 individually set by the object's initializer. */
9681 if (type && typedef_type
9682 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9683 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9684 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9686 /* Detect where we're using a typedef of function type to declare a
9687 function. PARMS will not be set, so we must create it now. */
9689 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9691 tree decls = NULL_TREE;
9694 for (args = TYPE_ARG_TYPES (type);
9695 args && args != void_list_node;
9696 args = TREE_CHAIN (args))
9698 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9700 DECL_CHAIN (decl) = decls;
9704 parms = nreverse (decls);
9706 if (decl_context != TYPENAME)
9708 /* A cv-qualifier-seq shall only be part of the function type
9709 for a non-static member function. [8.3.5/4 dcl.fct] */
9710 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9711 && (current_class_type == NULL_TREE || staticp) )
9714 ? G_("qualified function types cannot be used to "
9715 "declare static member functions")
9716 : G_("qualified function types cannot be used to "
9717 "declare free functions"));
9718 type = TYPE_MAIN_VARIANT (type);
9721 /* The qualifiers on the function type become the qualifiers on
9722 the non-static member function. */
9723 memfn_quals |= type_memfn_quals (type);
9724 type_quals = TYPE_UNQUALIFIED;
9728 /* If this is a type name (such as, in a cast or sizeof),
9729 compute the type and return it now. */
9731 if (decl_context == TYPENAME)
9733 /* Note that the grammar rejects storage classes
9734 in typenames, fields or parameters. */
9735 if (type_quals != TYPE_UNQUALIFIED)
9736 type_quals = TYPE_UNQUALIFIED;
9738 /* Special case: "friend class foo" looks like a TYPENAME context. */
9741 if (type_quals != TYPE_UNQUALIFIED)
9743 error ("type qualifiers specified for friend class declaration");
9744 type_quals = TYPE_UNQUALIFIED;
9748 error ("%<inline%> specified for friend class declaration");
9754 /* Don't allow friend declaration without a class-key. */
9755 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9756 permerror (input_location, "template parameters cannot be friends");
9757 else if (TREE_CODE (type) == TYPENAME_TYPE)
9758 permerror (input_location, "friend declaration requires class-key, "
9759 "i.e. %<friend class %T::%D%>",
9760 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9762 permerror (input_location, "friend declaration requires class-key, "
9763 "i.e. %<friend %#T%>",
9767 /* Only try to do this stuff if we didn't already give up. */
9768 if (type != integer_type_node)
9770 /* A friendly class? */
9771 if (current_class_type)
9772 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9775 error ("trying to make class %qT a friend of global scope",
9778 type = void_type_node;
9781 else if (memfn_quals)
9783 if (ctype == NULL_TREE
9784 && TREE_CODE (type) == METHOD_TYPE)
9785 ctype = TYPE_METHOD_BASETYPE (type);
9788 type = build_memfn_type (type, ctype, memfn_quals);
9789 /* Core issue #547: need to allow this in template type args. */
9790 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9791 type = apply_memfn_quals (type, memfn_quals);
9793 error ("invalid qualifiers on non-member function type");
9798 else if (unqualified_id == NULL_TREE && decl_context != PARM
9799 && decl_context != CATCHPARM
9800 && TREE_CODE (type) != UNION_TYPE
9803 error ("abstract declarator %qT used as declaration", type);
9804 return error_mark_node;
9807 /* Only functions may be declared using an operator-function-id. */
9809 && IDENTIFIER_OPNAME_P (unqualified_id)
9810 && TREE_CODE (type) != FUNCTION_TYPE
9811 && TREE_CODE (type) != METHOD_TYPE)
9813 error ("declaration of %qD as non-function", unqualified_id);
9814 return error_mark_node;
9817 /* We don't check parameter types here because we can emit a better
9818 error message later. */
9819 if (decl_context != PARM)
9821 type = check_var_type (unqualified_id, type);
9822 if (type == error_mark_node)
9823 return error_mark_node;
9826 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9827 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9829 if (decl_context == PARM || decl_context == CATCHPARM)
9831 if (ctype || in_namespace)
9832 error ("cannot use %<::%> in parameter declaration");
9834 if (type_uses_auto (type))
9836 error ("parameter declared %<auto%>");
9837 type = error_mark_node;
9840 /* A parameter declared as an array of T is really a pointer to T.
9841 One declared as a function is really a pointer to a function.
9842 One declared as a member is really a pointer to member. */
9844 if (TREE_CODE (type) == ARRAY_TYPE)
9846 /* Transfer const-ness of array into that of type pointed to. */
9847 type = build_pointer_type (TREE_TYPE (type));
9848 type_quals = TYPE_UNQUALIFIED;
9850 else if (TREE_CODE (type) == FUNCTION_TYPE)
9851 type = build_pointer_type (type);
9854 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9855 && !NEW_DELETE_OPNAME_P (unqualified_id))
9857 cp_cv_quals real_quals = memfn_quals;
9858 if (constexpr_p && sfk != sfk_constructor && sfk != sfk_destructor)
9859 real_quals |= TYPE_QUAL_CONST;
9860 type = build_memfn_type (type, ctype, real_quals);
9866 if (decl_context == PARM)
9868 decl = cp_build_parm_decl (unqualified_id, type);
9870 bad_specifiers (decl, BSP_PARM, virtualp,
9871 memfn_quals != TYPE_UNQUALIFIED,
9872 inlinep, friendp, raises != NULL_TREE);
9874 else if (decl_context == FIELD)
9876 /* The C99 flexible array extension. */
9877 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9878 && TYPE_DOMAIN (type) == NULL_TREE)
9880 tree itype = compute_array_index_type (dname, integer_zero_node,
9881 tf_warning_or_error);
9882 type = build_cplus_array_type (TREE_TYPE (type), itype);
9885 if (type == error_mark_node)
9887 /* Happens when declaring arrays of sizes which
9888 are error_mark_node, for example. */
9891 else if (in_namespace && !friendp)
9893 /* Something like struct S { int N::j; }; */
9894 error ("invalid use of %<::%>");
9895 return error_mark_node;
9897 else if (TREE_CODE (type) == FUNCTION_TYPE
9898 || TREE_CODE (type) == METHOD_TYPE)
9901 tree function_context;
9905 /* This should never happen in pure C++ (the check
9906 could be an assert). It could happen in
9907 Objective-C++ if someone writes invalid code that
9908 uses a function declaration for an instance
9909 variable or property (instance variables and
9910 properties are parsed as FIELD_DECLs, but they are
9911 part of an Objective-C class, not a C++ class).
9912 That code is invalid and is caught by this
9916 error ("declaration of function %qD in invalid context",
9918 return error_mark_node;
9921 /* ``A union may [ ... ] not [ have ] virtual functions.''
9923 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9925 error ("function %qD declared virtual inside a union",
9927 return error_mark_node;
9930 if (NEW_DELETE_OPNAME_P (unqualified_id))
9934 error ("%qD cannot be declared virtual, since it "
9942 /* Check that the name used for a destructor makes sense. */
9943 if (sfk == sfk_destructor)
9945 tree uqname = id_declarator->u.id.unqualified_name;
9949 gcc_assert (friendp);
9950 error ("expected qualified name in friend declaration "
9951 "for destructor %qD", uqname);
9952 return error_mark_node;
9955 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9957 error ("declaration of %qD as member of %qT",
9959 return error_mark_node;
9963 error ("a destructor cannot be %<constexpr%>");
9964 return error_mark_node;
9967 else if (sfk == sfk_constructor && friendp && !ctype)
9969 error ("expected qualified name in friend declaration "
9970 "for constructor %qD",
9971 id_declarator->u.id.unqualified_name);
9972 return error_mark_node;
9975 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9976 function_context = (ctype != NULL_TREE) ?
9977 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9978 publicp = (! friendp || ! staticp)
9979 && function_context == NULL_TREE;
9980 decl = grokfndecl (ctype, type,
9981 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9982 ? unqualified_id : dname,
9985 virtualp, flags, memfn_quals, raises,
9986 friendp ? -1 : 0, friendp, publicp,
9987 inlinep | (2 * constexpr_p),
9989 funcdef_flag, template_count, in_namespace,
9990 attrlist, declarator->id_loc);
9991 decl = set_virt_specifiers (decl, virt_specifiers);
9992 if (decl == NULL_TREE)
9993 return error_mark_node;
9995 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9996 /* The decl and setting of decl_attr is also turned off. */
9997 decl = build_decl_attribute_variant (decl, decl_attr);
10000 /* [class.conv.ctor]
10002 A constructor declared without the function-specifier
10003 explicit that can be called with a single parameter
10004 specifies a conversion from the type of its first
10005 parameter to the type of its class. Such a constructor
10006 is called a converting constructor. */
10007 if (explicitp == 2)
10008 DECL_NONCONVERTING_P (decl) = 1;
10010 else if (!staticp && !dependent_type_p (type)
10011 && !COMPLETE_TYPE_P (complete_type (type))
10012 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
10014 if (unqualified_id)
10015 error ("field %qD has incomplete type", unqualified_id);
10017 error ("name %qT has incomplete type", type);
10019 /* If we're instantiating a template, tell them which
10020 instantiation made the field's type be incomplete. */
10021 if (current_class_type
10022 && TYPE_NAME (current_class_type)
10023 && IDENTIFIER_TEMPLATE (current_class_name)
10025 && declspecs->type == type)
10026 error (" in instantiation of template %qT",
10027 current_class_type);
10029 return error_mark_node;
10035 error ("%qE is neither function nor member function; "
10036 "cannot be declared friend", unqualified_id);
10044 /* Friends are treated specially. */
10045 if (ctype == current_class_type)
10046 ; /* We already issued a permerror. */
10047 else if (decl && DECL_NAME (decl))
10049 if (template_class_depth (current_class_type) == 0)
10051 decl = check_explicit_specialization
10052 (unqualified_id, decl, template_count,
10053 2 * funcdef_flag + 4);
10054 if (decl == error_mark_node)
10055 return error_mark_node;
10058 decl = do_friend (ctype, unqualified_id, decl,
10064 return error_mark_node;
10067 /* Structure field. It may not be a function, except for C++. */
10069 if (decl == NULL_TREE)
10075 /* An attempt is being made to initialize a non-static
10076 member. But, from [class.mem]:
10078 4 A member-declarator can contain a
10079 constant-initializer only if it declares a static
10080 member (_class.static_) of integral or enumeration
10081 type, see _class.static.data_.
10083 This used to be relatively common practice, but
10084 the rest of the compiler does not correctly
10085 handle the initialization unless the member is
10086 static so we make it static below. */
10087 if (cxx_dialect >= cxx0x)
10089 sorry ("non-static data member initializers");
10093 permerror (input_location, "ISO C++ forbids initialization of member %qD",
10095 permerror (input_location, "making %qD static", unqualified_id);
10103 /* C++ allows static class members. All other work
10104 for this is done by grokfield. */
10105 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
10106 set_linkage_for_static_data_member (decl);
10107 /* Even if there is an in-class initialization, DECL
10108 is considered undefined until an out-of-class
10109 definition is provided. */
10110 DECL_EXTERNAL (decl) = 1;
10113 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
10115 if (constexpr_p && !initialized)
10117 error ("constexpr static data member %qD must have an "
10118 "initializer", decl);
10119 constexpr_p = false;
10126 error ("non-static data member %qE declared %<constexpr%>",
10128 constexpr_p = false;
10130 decl = build_decl (input_location,
10131 FIELD_DECL, unqualified_id, type);
10132 DECL_NONADDRESSABLE_P (decl) = bitfield;
10133 if (bitfield && !unqualified_id)
10134 TREE_NO_WARNING (decl) = 1;
10136 if (storage_class == sc_mutable)
10138 DECL_MUTABLE_P (decl) = 1;
10139 storage_class = sc_none;
10143 bad_specifiers (decl, BSP_FIELD, virtualp,
10144 memfn_quals != TYPE_UNQUALIFIED,
10145 inlinep, friendp, raises != NULL_TREE);
10148 else if (TREE_CODE (type) == FUNCTION_TYPE
10149 || TREE_CODE (type) == METHOD_TYPE)
10151 tree original_name;
10154 if (!unqualified_id)
10155 return error_mark_node;
10157 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
10158 original_name = dname;
10160 original_name = unqualified_id;
10162 if (storage_class == sc_auto)
10163 error ("storage class %<auto%> invalid for function %qs", name);
10164 else if (storage_class == sc_register)
10165 error ("storage class %<register%> invalid for function %qs", name);
10167 error ("storage class %<__thread%> invalid for function %qs", name);
10169 if (virt_specifiers)
10170 error ("virt-specifiers in %qs not allowed outside a class definition", name);
10171 /* Function declaration not at top level.
10172 Storage classes other than `extern' are not allowed
10173 and `extern' makes no difference. */
10174 if (! toplevel_bindings_p ()
10175 && (storage_class == sc_static
10176 || declspecs->specs[(int)ds_inline])
10179 if (storage_class == sc_static)
10180 pedwarn (input_location, OPT_pedantic,
10181 "%<static%> specified invalid for function %qs "
10182 "declared out of global scope", name);
10184 pedwarn (input_location, OPT_pedantic,
10185 "%<inline%> specifier invalid for function %qs "
10186 "declared out of global scope", name);
10189 if (ctype == NULL_TREE)
10193 error ("virtual non-class function %qs", name);
10196 else if (sfk == sfk_constructor
10197 || sfk == sfk_destructor)
10199 error (funcdef_flag
10200 ? "%qs defined in a non-class scope"
10201 : "%qs declared in a non-class scope", name);
10206 /* Record presence of `static'. */
10207 publicp = (ctype != NULL_TREE
10208 || storage_class == sc_extern
10209 || storage_class != sc_static);
10211 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10212 virtualp, flags, memfn_quals, raises,
10214 publicp, inlinep | (2 * constexpr_p), sfk,
10216 template_count, in_namespace, attrlist,
10217 declarator->id_loc);
10218 if (decl == NULL_TREE)
10219 return error_mark_node;
10223 int invalid_static = 0;
10225 /* Don't allow a static member function in a class, and forbid
10226 declaring main to be static. */
10227 if (TREE_CODE (type) == METHOD_TYPE)
10229 permerror (input_location, "cannot declare member function %qD to have "
10230 "static linkage", decl);
10231 invalid_static = 1;
10233 else if (current_function_decl)
10235 /* FIXME need arm citation */
10236 error ("cannot declare static function inside another function");
10237 invalid_static = 1;
10240 if (invalid_static)
10243 storage_class = sc_none;
10249 /* It's a variable. */
10251 /* An uninitialized decl with `extern' is a reference. */
10252 decl = grokvardecl (type, unqualified_id,
10255 (type_quals & TYPE_QUAL_CONST) != 0,
10256 ctype ? ctype : in_namespace);
10257 bad_specifiers (decl, BSP_VAR, virtualp,
10258 memfn_quals != TYPE_UNQUALIFIED,
10259 inlinep, friendp, raises != NULL_TREE);
10263 DECL_CONTEXT (decl) = ctype;
10266 permerror (input_location, "%<static%> may not be used when defining "
10267 "(as opposed to declaring) a static data member");
10269 storage_class = sc_none;
10271 if (storage_class == sc_register && TREE_STATIC (decl))
10273 error ("static member %qD declared %<register%>", decl);
10274 storage_class = sc_none;
10276 if (storage_class == sc_extern && pedantic)
10278 pedwarn (input_location, OPT_pedantic,
10279 "cannot explicitly declare member %q#D to have "
10280 "extern linkage", decl);
10281 storage_class = sc_none;
10284 else if (constexpr_p && DECL_EXTERNAL (decl))
10286 error ("declaration of constexpr variable %qD is not a definition",
10288 constexpr_p = false;
10292 if (storage_class == sc_extern && initialized && !funcdef_flag)
10294 if (toplevel_bindings_p ())
10296 /* It's common practice (and completely valid) to have a const
10297 be initialized and declared extern. */
10298 if (!(type_quals & TYPE_QUAL_CONST))
10299 warning (0, "%qs initialized and declared %<extern%>", name);
10303 error ("%qs has both %<extern%> and initializer", name);
10304 return error_mark_node;
10308 /* Record `register' declaration for warnings on &
10309 and in case doing stupid register allocation. */
10311 if (storage_class == sc_register)
10312 DECL_REGISTER (decl) = 1;
10313 else if (storage_class == sc_extern)
10314 DECL_THIS_EXTERN (decl) = 1;
10315 else if (storage_class == sc_static)
10316 DECL_THIS_STATIC (decl) = 1;
10318 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10319 if (constexpr_p && TREE_CODE (decl) == VAR_DECL)
10320 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10322 /* Record constancy and volatility on the DECL itself . There's
10323 no need to do this when processing a template; we'll do this
10324 for the instantiated declaration based on the type of DECL. */
10325 if (!processing_template_decl)
10326 cp_apply_type_quals_to_decl (type_quals, decl);
10332 /* Subroutine of start_function. Ensure that each of the parameter
10333 types (as listed in PARMS) is complete, as is required for a
10334 function definition. */
10337 require_complete_types_for_parms (tree parms)
10339 for (; parms; parms = DECL_CHAIN (parms))
10341 if (dependent_type_p (TREE_TYPE (parms)))
10343 if (!VOID_TYPE_P (TREE_TYPE (parms))
10344 && complete_type_or_else (TREE_TYPE (parms), parms))
10346 relayout_decl (parms);
10347 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10350 /* grokparms or complete_type_or_else will have already issued
10352 TREE_TYPE (parms) = error_mark_node;
10356 /* Returns nonzero if T is a local variable. */
10359 local_variable_p (const_tree t)
10361 if ((TREE_CODE (t) == VAR_DECL
10362 /* A VAR_DECL with a context that is a _TYPE is a static data
10364 && !TYPE_P (CP_DECL_CONTEXT (t))
10365 /* Any other non-local variable must be at namespace scope. */
10366 && !DECL_NAMESPACE_SCOPE_P (t))
10367 || (TREE_CODE (t) == PARM_DECL))
10373 /* Like local_variable_p, but suitable for use as a tree-walking
10377 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10378 void *data ATTRIBUTE_UNUSED)
10380 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10382 else if (TYPE_P (*tp))
10383 *walk_subtrees = 0;
10389 /* Check that ARG, which is a default-argument expression for a
10390 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10391 something goes wrong. DECL may also be a _TYPE node, rather than a
10392 DECL, if there is no DECL available. */
10395 check_default_argument (tree decl, tree arg)
10400 if (TREE_CODE (arg) == DEFAULT_ARG)
10401 /* We get a DEFAULT_ARG when looking at an in-class declaration
10402 with a default argument. Ignore the argument for now; we'll
10403 deal with it after the class is complete. */
10412 decl_type = TREE_TYPE (decl);
10414 if (arg == error_mark_node
10415 || decl == error_mark_node
10416 || TREE_TYPE (arg) == error_mark_node
10417 || decl_type == error_mark_node)
10418 /* Something already went wrong. There's no need to check
10420 return error_mark_node;
10422 /* [dcl.fct.default]
10424 A default argument expression is implicitly converted to the
10426 if (!TREE_TYPE (arg)
10427 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10430 error ("default argument for %q#D has type %qT",
10431 decl, TREE_TYPE (arg));
10433 error ("default argument for parameter of type %qT has type %qT",
10434 decl_type, TREE_TYPE (arg));
10436 return error_mark_node;
10439 /* [dcl.fct.default]
10441 Local variables shall not be used in default argument
10444 The keyword `this' shall not be used in a default argument of a
10445 member function. */
10446 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10449 error ("default argument %qE uses local variable %qD", arg, var);
10450 return error_mark_node;
10457 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10460 type_is_deprecated (tree type)
10462 enum tree_code code;
10463 if (TREE_DEPRECATED (type))
10465 if (TYPE_NAME (type)
10466 && TREE_DEPRECATED (TYPE_NAME (type)))
10469 /* Do warn about using typedefs to a deprecated class. */
10470 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10471 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10473 code = TREE_CODE (type);
10475 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10476 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10477 || code == METHOD_TYPE || code == ARRAY_TYPE)
10478 return type_is_deprecated (TREE_TYPE (type));
10480 if (TYPE_PTRMEMFUNC_P (type))
10481 return type_is_deprecated
10482 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10487 /* Decode the list of parameter types for a function type.
10488 Given the list of things declared inside the parens,
10489 return a list of types.
10491 If this parameter does not end with an ellipsis, we append
10494 *PARMS is set to the chain of PARM_DECLs created. */
10497 grokparms (tree parmlist, tree *parms)
10499 tree result = NULL_TREE;
10500 tree decls = NULL_TREE;
10504 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10506 tree type = NULL_TREE;
10507 tree init = TREE_PURPOSE (parm);
10508 tree decl = TREE_VALUE (parm);
10509 const char *errmsg;
10511 if (parm == void_list_node)
10514 if (! decl || TREE_TYPE (decl) == error_mark_node)
10517 type = TREE_TYPE (decl);
10518 if (VOID_TYPE_P (type))
10520 if (same_type_p (type, void_type_node)
10521 && DECL_SELF_REFERENCE_P (type)
10522 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10523 /* this is a parmlist of `(void)', which is ok. */
10525 cxx_incomplete_type_error (decl, type);
10526 /* It's not a good idea to actually create parameters of
10527 type `void'; other parts of the compiler assume that a
10528 void type terminates the parameter list. */
10529 type = error_mark_node;
10530 TREE_TYPE (decl) = error_mark_node;
10533 if (type != error_mark_node
10534 && TYPE_FOR_JAVA (type)
10535 && MAYBE_CLASS_TYPE_P (type))
10537 error ("parameter %qD has Java class type", decl);
10538 type = error_mark_node;
10539 TREE_TYPE (decl) = error_mark_node;
10543 if (type != error_mark_node
10544 && (errmsg = targetm.invalid_parameter_type (type)))
10547 type = error_mark_node;
10548 TREE_TYPE (decl) = error_mark_node;
10551 if (type != error_mark_node)
10553 if (deprecated_state != DEPRECATED_SUPPRESS)
10555 tree deptype = type_is_deprecated (type);
10557 warn_deprecated_use (deptype, NULL_TREE);
10560 /* Top-level qualifiers on the parameters are
10561 ignored for function types. */
10562 type = cp_build_qualified_type (type, 0);
10563 if (TREE_CODE (type) == METHOD_TYPE)
10565 error ("parameter %qD invalidly declared method type", decl);
10566 type = build_pointer_type (type);
10567 TREE_TYPE (decl) = type;
10569 else if (abstract_virtuals_error (decl, type))
10570 any_error = 1; /* Seems like a good idea. */
10571 else if (POINTER_TYPE_P (type))
10573 /* [dcl.fct]/6, parameter types cannot contain pointers
10574 (references) to arrays of unknown bound. */
10575 tree t = TREE_TYPE (type);
10576 int ptr = TYPE_PTR_P (type);
10580 if (TYPE_PTR_P (t))
10582 else if (TREE_CODE (t) != ARRAY_TYPE)
10584 else if (!TYPE_DOMAIN (t))
10588 if (TREE_CODE (t) == ARRAY_TYPE)
10590 ? G_("parameter %qD includes pointer to array of "
10591 "unknown bound %qT")
10592 : G_("parameter %qD includes reference to array of "
10593 "unknown bound %qT"),
10599 else if (init && !processing_template_decl)
10600 init = check_default_argument (decl, init);
10603 DECL_CHAIN (decl) = decls;
10605 result = tree_cons (init, type, result);
10607 decls = nreverse (decls);
10608 result = nreverse (result);
10610 result = chainon (result, void_list_node);
10617 /* D is a constructor or overloaded `operator='.
10619 Let T be the class in which D is declared. Then, this function
10622 -1 if D's is an ill-formed constructor or copy assignment operator
10623 whose first parameter is of type `T'.
10624 0 if D is not a copy constructor or copy assignment
10626 1 if D is a copy constructor or copy assignment operator whose
10627 first parameter is a reference to non-const qualified T.
10628 2 if D is a copy constructor or copy assignment operator whose
10629 first parameter is a reference to const qualified T.
10631 This function can be used as a predicate. Positive values indicate
10632 a copy constructor and nonzero values indicate a copy assignment
10636 copy_fn_p (const_tree d)
10642 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10644 if (TREE_CODE (d) == TEMPLATE_DECL
10645 || (DECL_TEMPLATE_INFO (d)
10646 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10647 /* Instantiations of template member functions are never copy
10648 functions. Note that member functions of templated classes are
10649 represented as template functions internally, and we must
10650 accept those as copy functions. */
10653 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10657 arg_type = TREE_VALUE (args);
10658 if (arg_type == error_mark_node)
10661 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10663 /* Pass by value copy assignment operator. */
10666 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10667 && !TYPE_REF_IS_RVALUE (arg_type)
10668 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10670 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10676 args = TREE_CHAIN (args);
10678 if (args && args != void_list_node && !TREE_PURPOSE (args))
10679 /* There are more non-optional args. */
10685 /* D is a constructor or overloaded `operator='.
10687 Let T be the class in which D is declared. Then, this function
10688 returns true when D is a move constructor or move assignment
10689 operator, false otherwise. */
10692 move_fn_p (const_tree d)
10696 bool result = false;
10698 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10700 if (cxx_dialect == cxx98)
10701 /* There are no move constructors if we are in C++98 mode. */
10704 if (TREE_CODE (d) == TEMPLATE_DECL
10705 || (DECL_TEMPLATE_INFO (d)
10706 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10707 /* Instantiations of template member functions are never copy
10708 functions. Note that member functions of templated classes are
10709 represented as template functions internally, and we must
10710 accept those as copy functions. */
10713 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10717 arg_type = TREE_VALUE (args);
10718 if (arg_type == error_mark_node)
10721 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10722 && TYPE_REF_IS_RVALUE (arg_type)
10723 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10727 args = TREE_CHAIN (args);
10729 if (args && args != void_list_node && !TREE_PURPOSE (args))
10730 /* There are more non-optional args. */
10736 /* Remember any special properties of member function DECL. */
10739 grok_special_member_properties (tree decl)
10743 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10746 class_type = DECL_CONTEXT (decl);
10747 if (DECL_CONSTRUCTOR_P (decl))
10749 int ctor = copy_fn_p (decl);
10751 if (!DECL_ARTIFICIAL (decl))
10752 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10758 A non-template constructor for class X is a copy
10759 constructor if its first parameter is of type X&, const
10760 X&, volatile X& or const volatile X&, and either there
10761 are no other parameters or else all other parameters have
10762 default arguments. */
10763 TYPE_HAS_COPY_CTOR (class_type) = 1;
10764 if (user_provided_p (decl))
10765 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10767 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10769 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10771 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10772 if (user_provided_p (decl))
10773 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10775 else if (move_fn_p (decl) && user_provided_p (decl))
10776 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10777 else if (is_list_ctor (decl))
10778 TYPE_HAS_LIST_CTOR (class_type) = 1;
10780 if (DECL_DECLARED_CONSTEXPR_P (decl)
10781 && !copy_fn_p (decl) && !move_fn_p (decl))
10782 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10784 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10788 A non-template assignment operator for class X is a copy
10789 assignment operator if its parameter is of type X, X&, const
10790 X&, volatile X& or const volatile X&. */
10792 int assop = copy_fn_p (decl);
10796 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10797 if (user_provided_p (decl))
10798 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10800 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10802 else if (move_fn_p (decl) && user_provided_p (decl))
10803 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10805 /* Destructors are handled in check_methods. */
10808 /* Check a constructor DECL has the correct form. Complains
10809 if the class has a constructor of the form X(X). */
10812 grok_ctor_properties (const_tree ctype, const_tree decl)
10814 int ctor_parm = copy_fn_p (decl);
10820 A declaration of a constructor for a class X is ill-formed if
10821 its first parameter is of type (optionally cv-qualified) X
10822 and either there are no other parameters or else all other
10823 parameters have default arguments.
10825 We *don't* complain about member template instantiations that
10826 have this form, though; they can occur as we try to decide
10827 what constructor to use during overload resolution. Since
10828 overload resolution will never prefer such a constructor to
10829 the non-template copy constructor (which is either explicitly
10830 or implicitly defined), there's no need to worry about their
10831 existence. Theoretically, they should never even be
10832 instantiated, but that's hard to forestall. */
10833 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10841 /* An operator with this code is unary, but can also be binary. */
10844 ambi_op_p (enum tree_code code)
10846 return (code == INDIRECT_REF
10847 || code == ADDR_EXPR
10848 || code == UNARY_PLUS_EXPR
10849 || code == NEGATE_EXPR
10850 || code == PREINCREMENT_EXPR
10851 || code == PREDECREMENT_EXPR);
10854 /* An operator with this name can only be unary. */
10857 unary_op_p (enum tree_code code)
10859 return (code == TRUTH_NOT_EXPR
10860 || code == BIT_NOT_EXPR
10861 || code == COMPONENT_REF
10862 || code == TYPE_EXPR);
10865 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10866 errors are issued for invalid declarations. */
10869 grok_op_properties (tree decl, bool complain)
10871 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10873 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10874 tree name = DECL_NAME (decl);
10875 enum tree_code operator_code;
10880 /* Count the number of arguments and check for ellipsis. */
10881 for (argtype = argtypes, arity = 0;
10882 argtype && argtype != void_list_node;
10883 argtype = TREE_CHAIN (argtype))
10885 ellipsis_p = !argtype;
10887 class_type = DECL_CONTEXT (decl);
10888 if (class_type && !CLASS_TYPE_P (class_type))
10889 class_type = NULL_TREE;
10891 if (DECL_CONV_FN_P (decl))
10892 operator_code = TYPE_EXPR;
10896 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10897 if (ansi_opname (CODE) == name) \
10899 operator_code = (CODE); \
10902 else if (ansi_assopname (CODE) == name) \
10904 operator_code = (CODE); \
10905 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10909 #include "operators.def"
10910 #undef DEF_OPERATOR
10912 gcc_unreachable ();
10915 gcc_assert (operator_code != MAX_TREE_CODES);
10916 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10919 switch (operator_code)
10922 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10926 TYPE_GETS_DELETE (class_type) |= 1;
10930 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10933 case VEC_DELETE_EXPR:
10934 TYPE_GETS_DELETE (class_type) |= 2;
10941 /* [basic.std.dynamic.allocation]/1:
10943 A program is ill-formed if an allocation function is declared
10944 in a namespace scope other than global scope or declared static
10947 The same also holds true for deallocation functions. */
10948 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10949 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10951 if (DECL_NAMESPACE_SCOPE_P (decl))
10953 if (CP_DECL_CONTEXT (decl) != global_namespace)
10955 error ("%qD may not be declared within a namespace", decl);
10958 else if (!TREE_PUBLIC (decl))
10960 error ("%qD may not be declared as static", decl);
10966 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10968 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10969 DECL_IS_OPERATOR_NEW (decl) = 1;
10971 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10972 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10975 /* An operator function must either be a non-static member function
10976 or have at least one parameter of a class, a reference to a class,
10977 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10978 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10980 if (operator_code == TYPE_EXPR
10981 || operator_code == CALL_EXPR
10982 || operator_code == COMPONENT_REF
10983 || operator_code == ARRAY_REF
10984 || operator_code == NOP_EXPR)
10986 error ("%qD must be a nonstatic member function", decl);
10993 if (DECL_STATIC_FUNCTION_P (decl))
10995 error ("%qD must be either a non-static member "
10996 "function or a non-member function", decl);
11000 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
11002 tree arg = non_reference (TREE_VALUE (p));
11003 if (arg == error_mark_node)
11006 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11007 because these checks are performed even on
11008 template functions. */
11009 if (MAYBE_CLASS_TYPE_P (arg)
11010 || TREE_CODE (arg) == ENUMERAL_TYPE)
11014 if (!p || p == void_list_node)
11017 error ("%qD must have an argument of class or "
11018 "enumerated type", decl);
11024 /* There are no restrictions on the arguments to an overloaded
11026 if (operator_code == CALL_EXPR)
11029 /* Warn about conversion operators that will never be used. */
11030 if (IDENTIFIER_TYPENAME_P (name)
11031 && ! DECL_TEMPLATE_INFO (decl)
11033 /* Warn only declaring the function; there is no need to
11034 warn again about out-of-class definitions. */
11035 && class_type == current_class_type)
11037 tree t = TREE_TYPE (name);
11038 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
11041 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
11043 if (TREE_CODE (t) == VOID_TYPE)
11044 warning (OPT_Wconversion,
11046 ? G_("conversion to a reference to void "
11047 "will never use a type conversion operator")
11048 : G_("conversion to void "
11049 "will never use a type conversion operator"));
11050 else if (class_type)
11052 if (t == class_type)
11053 warning (OPT_Wconversion,
11055 ? G_("conversion to a reference to the same type "
11056 "will never use a type conversion operator")
11057 : G_("conversion to the same type "
11058 "will never use a type conversion operator"));
11059 /* Don't force t to be complete here. */
11060 else if (MAYBE_CLASS_TYPE_P (t)
11061 && COMPLETE_TYPE_P (t)
11062 && DERIVED_FROM_P (t, class_type))
11063 warning (OPT_Wconversion,
11065 ? G_("conversion to a reference to a base class "
11066 "will never use a type conversion operator")
11067 : G_("conversion to a base class "
11068 "will never use a type conversion operator"));
11073 if (operator_code == COND_EXPR)
11076 error ("ISO C++ prohibits overloading operator ?:");
11079 else if (ellipsis_p)
11081 error ("%qD must not have variable number of arguments", decl);
11084 else if (ambi_op_p (operator_code))
11087 /* We pick the one-argument operator codes by default, so
11088 we don't have to change anything. */
11090 else if (arity == 2)
11092 /* If we thought this was a unary operator, we now know
11093 it to be a binary operator. */
11094 switch (operator_code)
11097 operator_code = MULT_EXPR;
11101 operator_code = BIT_AND_EXPR;
11104 case UNARY_PLUS_EXPR:
11105 operator_code = PLUS_EXPR;
11109 operator_code = MINUS_EXPR;
11112 case PREINCREMENT_EXPR:
11113 operator_code = POSTINCREMENT_EXPR;
11116 case PREDECREMENT_EXPR:
11117 operator_code = POSTDECREMENT_EXPR;
11121 gcc_unreachable ();
11124 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
11126 if ((operator_code == POSTINCREMENT_EXPR
11127 || operator_code == POSTDECREMENT_EXPR)
11128 && ! processing_template_decl
11129 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11132 error ("postfix %qD must take %<int%> as its argument",
11135 error ("postfix %qD must take %<int%> as its second "
11143 error ("%qD must take either zero or one argument", decl);
11145 error ("%qD must take either one or two arguments", decl);
11149 /* More Effective C++ rule 6. */
11151 && (operator_code == POSTINCREMENT_EXPR
11152 || operator_code == POSTDECREMENT_EXPR
11153 || operator_code == PREINCREMENT_EXPR
11154 || operator_code == PREDECREMENT_EXPR))
11156 tree arg = TREE_VALUE (argtypes);
11157 tree ret = TREE_TYPE (TREE_TYPE (decl));
11158 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11159 arg = TREE_TYPE (arg);
11160 arg = TYPE_MAIN_VARIANT (arg);
11161 if (operator_code == PREINCREMENT_EXPR
11162 || operator_code == PREDECREMENT_EXPR)
11164 if (TREE_CODE (ret) != REFERENCE_TYPE
11165 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11167 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11168 build_reference_type (arg));
11172 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11173 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11177 else if (unary_op_p (operator_code))
11182 error ("%qD must take %<void%>", decl);
11184 error ("%qD must take exactly one argument", decl);
11188 else /* if (binary_op_p (operator_code)) */
11193 error ("%qD must take exactly one argument", decl);
11195 error ("%qD must take exactly two arguments", decl);
11199 /* More Effective C++ rule 7. */
11201 && (operator_code == TRUTH_ANDIF_EXPR
11202 || operator_code == TRUTH_ORIF_EXPR
11203 || operator_code == COMPOUND_EXPR))
11204 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11208 /* Effective C++ rule 23. */
11211 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11212 && (operator_code == PLUS_EXPR
11213 || operator_code == MINUS_EXPR
11214 || operator_code == TRUNC_DIV_EXPR
11215 || operator_code == MULT_EXPR
11216 || operator_code == TRUNC_MOD_EXPR)
11217 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11218 warning (OPT_Weffc__, "%qD should return by value", decl);
11220 /* [over.oper]/8 */
11221 for (; argtypes && argtypes != void_list_node;
11222 argtypes = TREE_CHAIN (argtypes))
11223 if (TREE_PURPOSE (argtypes))
11225 TREE_PURPOSE (argtypes) = NULL_TREE;
11226 if (operator_code == POSTINCREMENT_EXPR
11227 || operator_code == POSTDECREMENT_EXPR)
11229 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11234 error ("%qD cannot have default arguments", decl);
11242 /* Return a string giving the keyword associate with CODE. */
11244 static const char *
11245 tag_name (enum tag_types code)
11257 case typename_type:
11260 gcc_unreachable ();
11264 /* Name lookup in an elaborated-type-specifier (after the keyword
11265 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11266 elaborated-type-specifier is invalid, issue a diagnostic and return
11267 error_mark_node; otherwise, return the *_TYPE to which it referred.
11268 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11271 check_elaborated_type_specifier (enum tag_types tag_code,
11273 bool allow_template_p)
11279 struct S { struct S *p; };
11281 name lookup will find the TYPE_DECL for the implicit "S::S"
11282 typedef. Adjust for that here. */
11283 if (DECL_SELF_REFERENCE_P (decl))
11284 decl = TYPE_NAME (TREE_TYPE (decl));
11286 type = TREE_TYPE (decl);
11288 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11289 is false for this case as well. */
11290 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11292 error ("using template type parameter %qT after %qs",
11293 type, tag_name (tag_code));
11294 return error_mark_node;
11298 If the identifier resolves to a typedef-name or a template
11299 type-parameter, the elaborated-type-specifier is ill-formed.
11301 In other words, the only legitimate declaration to use in the
11302 elaborated type specifier is the implicit typedef created when
11303 the type is declared. */
11304 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11305 && !DECL_SELF_REFERENCE_P (decl)
11306 && tag_code != typename_type)
11308 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11309 error ("%q+D has a previous declaration here", decl);
11310 return error_mark_node;
11312 else if (TREE_CODE (type) != RECORD_TYPE
11313 && TREE_CODE (type) != UNION_TYPE
11314 && tag_code != enum_type
11315 && tag_code != typename_type)
11317 error ("%qT referred to as %qs", type, tag_name (tag_code));
11318 error ("%q+T has a previous declaration here", type);
11319 return error_mark_node;
11321 else if (TREE_CODE (type) != ENUMERAL_TYPE
11322 && tag_code == enum_type)
11324 error ("%qT referred to as enum", type);
11325 error ("%q+T has a previous declaration here", type);
11326 return error_mark_node;
11328 else if (!allow_template_p
11329 && TREE_CODE (type) == RECORD_TYPE
11330 && CLASSTYPE_IS_TEMPLATE (type))
11332 /* If a class template appears as elaborated type specifier
11333 without a template header such as:
11335 template <class T> class C {};
11336 void f(class C); // No template header here
11338 then the required template argument is missing. */
11339 error ("template argument required for %<%s %T%>",
11340 tag_name (tag_code),
11341 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11342 return error_mark_node;
11348 /* Lookup NAME in elaborate type specifier in scope according to
11349 SCOPE and issue diagnostics if necessary.
11350 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11351 found, and ERROR_MARK_NODE for type error. */
11354 lookup_and_check_tag (enum tag_types tag_code, tree name,
11355 tag_scope scope, bool template_header_p)
11359 if (scope == ts_global)
11361 /* First try ordinary name lookup, ignoring hidden class name
11362 injected via friend declaration. */
11363 decl = lookup_name_prefer_type (name, 2);
11364 /* If that fails, the name will be placed in the smallest
11365 non-class, non-function-prototype scope according to 3.3.1/5.
11366 We may already have a hidden name declared as friend in this
11367 scope. So lookup again but not ignoring hidden names.
11368 If we find one, that name will be made visible rather than
11369 creating a new tag. */
11371 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11374 decl = lookup_type_scope (name, scope);
11376 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11377 decl = DECL_TEMPLATE_RESULT (decl);
11379 if (decl && TREE_CODE (decl) == TYPE_DECL)
11381 /* Look for invalid nested type:
11385 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11387 error ("%qD has the same name as the class in which it is "
11390 return error_mark_node;
11393 /* Two cases we need to consider when deciding if a class
11394 template is allowed as an elaborated type specifier:
11395 1. It is a self reference to its own class.
11396 2. It comes with a template header.
11400 template <class T> class C {
11401 class C *c1; // DECL_SELF_REFERENCE_P is true
11404 template <class U> class C; // template_header_p is true
11405 template <class T> class C<T>::D {
11406 class C *c2; // DECL_SELF_REFERENCE_P is true
11409 t = check_elaborated_type_specifier (tag_code,
11412 | DECL_SELF_REFERENCE_P (decl));
11415 else if (decl && TREE_CODE (decl) == TREE_LIST)
11417 error ("reference to %qD is ambiguous", name);
11418 print_candidates (decl);
11419 return error_mark_node;
11425 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11426 Define the tag as a forward-reference if it is not defined.
11428 If a declaration is given, process it here, and report an error if
11429 multiple declarations are not identical.
11431 SCOPE is TS_CURRENT when this is also a definition. Only look in
11432 the current frame for the name (since C++ allows new names in any
11433 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11434 declaration. Only look beginning from the current scope outward up
11435 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11437 TEMPLATE_HEADER_P is true when this declaration is preceded by
11438 a set of template parameters. */
11441 xref_tag_1 (enum tag_types tag_code, tree name,
11442 tag_scope scope, bool template_header_p)
11444 enum tree_code code;
11446 tree context = NULL_TREE;
11448 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11454 code = RECORD_TYPE;
11460 code = ENUMERAL_TYPE;
11463 gcc_unreachable ();
11466 /* In case of anonymous name, xref_tag is only called to
11467 make type node and push name. Name lookup is not required. */
11468 if (ANON_AGGRNAME_P (name))
11471 t = lookup_and_check_tag (tag_code, name,
11472 scope, template_header_p);
11474 if (t == error_mark_node)
11475 return error_mark_node;
11477 if (scope != ts_current && t && current_class_type
11478 && template_class_depth (current_class_type)
11479 && template_header_p)
11481 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11482 definition of this tag. Since, in addition, we are currently
11483 processing a (member) template declaration of a template
11484 class, we must be very careful; consider:
11491 { template <class V>
11492 friend struct S1; };
11494 Here, the S2::S1 declaration should not be confused with the
11495 outer declaration. In particular, the inner version should
11496 have a template parameter of level 2, not level 1. This
11497 would be particularly important if the member declaration
11500 template <class V = U> friend struct S1;
11502 say, when we should tsubst into `U' when instantiating
11503 S2. On the other hand, when presented with:
11513 we must find the inner binding eventually. We
11514 accomplish this by making sure that the new type we
11515 create to represent this declaration has the right
11517 context = TYPE_CONTEXT (t);
11523 /* If no such tag is yet defined, create a forward-reference node
11524 and record it as the "definition".
11525 When a real declaration of this type is found,
11526 the forward-reference will be altered into a real type. */
11527 if (code == ENUMERAL_TYPE)
11529 error ("use of enum %q#D without previous declaration", name);
11530 return error_mark_node;
11534 t = make_class_type (code);
11535 TYPE_CONTEXT (t) = context;
11536 t = pushtag (name, t, scope);
11541 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11543 if (!redeclare_class_template (t, current_template_parms))
11544 return error_mark_node;
11546 else if (!processing_template_decl
11547 && CLASS_TYPE_P (t)
11548 && CLASSTYPE_IS_TEMPLATE (t))
11550 error ("redeclaration of %qT as a non-template", t);
11551 error ("previous declaration %q+D", t);
11552 return error_mark_node;
11555 /* Make injected friend class visible. */
11556 if (scope != ts_within_enclosing_non_class
11557 && hidden_name_p (TYPE_NAME (t)))
11559 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11560 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11562 if (TYPE_TEMPLATE_INFO (t))
11564 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11565 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11573 /* Wrapper for xref_tag_1. */
11576 xref_tag (enum tag_types tag_code, tree name,
11577 tag_scope scope, bool template_header_p)
11580 timevar_start (TV_NAME_LOOKUP);
11581 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11582 timevar_stop (TV_NAME_LOOKUP);
11588 xref_tag_from_type (tree old, tree id, tag_scope scope)
11590 enum tag_types tag_kind;
11592 if (TREE_CODE (old) == RECORD_TYPE)
11593 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11595 tag_kind = union_type;
11597 if (id == NULL_TREE)
11598 id = TYPE_IDENTIFIER (old);
11600 return xref_tag (tag_kind, id, scope, false);
11603 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11604 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11605 access_* node, and the TREE_VALUE is the type of the base-class.
11606 Non-NULL TREE_TYPE indicates virtual inheritance.
11608 Returns true if the binfo hierarchy was successfully created,
11609 false if an error was detected. */
11612 xref_basetypes (tree ref, tree base_list)
11615 tree binfo, base_binfo;
11616 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11617 unsigned max_bases = 0; /* Maximum direct bases. */
11619 tree default_access;
11620 tree igo_prev; /* Track Inheritance Graph Order. */
11622 if (ref == error_mark_node)
11625 /* The base of a derived class is private by default, all others are
11627 default_access = (TREE_CODE (ref) == RECORD_TYPE
11628 && CLASSTYPE_DECLARED_CLASS (ref)
11629 ? access_private_node : access_public_node);
11631 /* First, make sure that any templates in base-classes are
11632 instantiated. This ensures that if we call ourselves recursively
11633 we do not get confused about which classes are marked and which
11635 basep = &base_list;
11638 tree basetype = TREE_VALUE (*basep);
11640 if (!(processing_template_decl && uses_template_parms (basetype))
11641 && !complete_type_or_else (basetype, NULL))
11642 /* An incomplete type. Remove it from the list. */
11643 *basep = TREE_CHAIN (*basep);
11647 if (TREE_TYPE (*basep))
11649 if (CLASS_TYPE_P (basetype))
11650 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11651 basep = &TREE_CHAIN (*basep);
11655 TYPE_MARKED_P (ref) = 1;
11657 /* The binfo slot should be empty, unless this is an (ill-formed)
11659 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11661 error ("redefinition of %q#T", ref);
11665 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11667 binfo = make_tree_binfo (max_bases);
11669 TYPE_BINFO (ref) = binfo;
11670 BINFO_OFFSET (binfo) = size_zero_node;
11671 BINFO_TYPE (binfo) = ref;
11673 /* Apply base-class info set up to the variants of this type. */
11674 fixup_type_variants (ref);
11678 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11679 /* An aggregate cannot have baseclasses. */
11680 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11682 if (TREE_CODE (ref) == UNION_TYPE)
11684 error ("derived union %qT invalid", ref);
11691 if (TYPE_FOR_JAVA (ref))
11693 error ("Java class %qT cannot have multiple bases", ref);
11700 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11702 if (TYPE_FOR_JAVA (ref))
11704 error ("Java class %qT cannot have virtual bases", ref);
11709 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11711 tree access = TREE_PURPOSE (base_list);
11712 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11713 tree basetype = TREE_VALUE (base_list);
11715 if (access == access_default_node)
11716 access = default_access;
11718 if (PACK_EXPANSION_P (basetype))
11719 basetype = PACK_EXPANSION_PATTERN (basetype);
11720 if (TREE_CODE (basetype) == TYPE_DECL)
11721 basetype = TREE_TYPE (basetype);
11722 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11724 error ("base type %qT fails to be a struct or class type",
11729 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11730 TYPE_FOR_JAVA (ref) = 1;
11732 base_binfo = NULL_TREE;
11733 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11735 base_binfo = TYPE_BINFO (basetype);
11736 /* The original basetype could have been a typedef'd type. */
11737 basetype = BINFO_TYPE (base_binfo);
11739 /* Inherit flags from the base. */
11740 TYPE_HAS_NEW_OPERATOR (ref)
11741 |= TYPE_HAS_NEW_OPERATOR (basetype);
11742 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11743 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11744 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11745 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11746 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11747 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11748 CLASSTYPE_REPEATED_BASE_P (ref)
11749 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11752 /* We must do this test after we've seen through a typedef
11754 if (TYPE_MARKED_P (basetype))
11756 if (basetype == ref)
11757 error ("recursive type %qT undefined", basetype);
11759 error ("duplicate base type %qT invalid", basetype);
11763 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11764 /* Regenerate the pack expansion for the bases. */
11765 basetype = make_pack_expansion (basetype);
11767 TYPE_MARKED_P (basetype) = 1;
11769 base_binfo = copy_binfo (base_binfo, basetype, ref,
11770 &igo_prev, via_virtual);
11771 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11772 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11774 BINFO_BASE_APPEND (binfo, base_binfo);
11775 BINFO_BASE_ACCESS_APPEND (binfo, access);
11778 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11779 /* If we have space in the vbase vector, we must have shared at
11780 least one of them, and are therefore diamond shaped. */
11781 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11783 /* Unmark all the types. */
11784 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11785 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11786 TYPE_MARKED_P (ref) = 0;
11788 /* Now see if we have a repeated base type. */
11789 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11791 for (base_binfo = binfo; base_binfo;
11792 base_binfo = TREE_CHAIN (base_binfo))
11794 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11796 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11799 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11801 for (base_binfo = binfo; base_binfo;
11802 base_binfo = TREE_CHAIN (base_binfo))
11803 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11804 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11813 /* Copies the enum-related properties from type SRC to type DST.
11814 Used with the underlying type of an enum and the enum itself. */
11816 copy_type_enum (tree dst, tree src)
11818 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11819 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11820 TYPE_SIZE (dst) = TYPE_SIZE (src);
11821 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11822 SET_TYPE_MODE (dst, TYPE_MODE (src));
11823 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11824 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11825 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11826 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11829 /* Begin compiling the definition of an enumeration type.
11832 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11834 UNDERLYING_TYPE is the type that will be used as the storage for
11835 the enumeration type. This should be NULL_TREE if no storage type
11838 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11840 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11842 Returns the type object, as yet incomplete.
11843 Also records info about it so that build_enumerator
11844 may be used to declare the individual values as they are read. */
11847 start_enum (tree name, tree enumtype, tree underlying_type,
11848 bool scoped_enum_p, bool *is_new)
11850 tree prevtype = NULL_TREE;
11851 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11855 /* [C++0x dcl.enum]p5:
11857 If not explicitly specified, the underlying type of a scoped
11858 enumeration type is int. */
11859 if (!underlying_type && scoped_enum_p)
11860 underlying_type = integer_type_node;
11862 if (underlying_type)
11863 underlying_type = cv_unqualified (underlying_type);
11865 /* If this is the real definition for a previous forward reference,
11866 fill in the contents in the same object that used to be the
11867 forward reference. */
11869 enumtype = lookup_and_check_tag (enum_type, name,
11870 /*tag_scope=*/ts_current,
11871 /*template_header_p=*/false);
11873 /* In case of a template_decl, the only check that should be deferred
11874 to instantiation time is the comparison of underlying types. */
11875 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11877 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11879 error_at (input_location, "scoped/unscoped mismatch "
11880 "in enum %q#T", enumtype);
11881 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11882 "previous definition here");
11883 enumtype = error_mark_node;
11885 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11887 error_at (input_location, "underlying type mismatch "
11888 "in enum %q#T", enumtype);
11889 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11890 "previous definition here");
11891 enumtype = error_mark_node;
11893 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11894 && !dependent_type_p (underlying_type)
11895 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11896 && !same_type_p (underlying_type,
11897 ENUM_UNDERLYING_TYPE (enumtype)))
11899 error_at (input_location, "different underlying type "
11900 "in enum %q#T", enumtype);
11901 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11902 "previous definition here");
11903 underlying_type = NULL_TREE;
11907 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11908 || processing_template_decl)
11910 /* In case of error, make a dummy enum to allow parsing to
11912 if (enumtype == error_mark_node)
11914 name = make_anon_name ();
11915 enumtype = NULL_TREE;
11918 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11919 of an opaque enum, or an opaque enum of an already defined
11920 enumeration (C++0x only).
11921 In any other case, it'll be NULL_TREE. */
11927 prevtype = enumtype;
11928 enumtype = cxx_make_type (ENUMERAL_TYPE);
11929 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11930 if (enumtype == error_mark_node)
11931 return error_mark_node;
11933 /* The enum is considered opaque until the opening '{' of the
11934 enumerator list. */
11935 SET_OPAQUE_ENUM_P (enumtype, true);
11936 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11939 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11941 if (underlying_type)
11943 if (CP_INTEGRAL_TYPE_P (underlying_type))
11945 copy_type_enum (enumtype, underlying_type);
11946 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11948 else if (dependent_type_p (underlying_type))
11949 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11951 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11952 underlying_type, enumtype);
11955 /* If into a template class, the returned enum is always the first
11956 declaration (opaque or not) seen. This way all the references to
11957 this type will be to the same declaration. The following ones are used
11958 only to check for definition errors. */
11959 if (prevtype && processing_template_decl)
11965 /* After processing and defining all the values of an enumeration type,
11966 install their decls in the enumeration type.
11967 ENUMTYPE is the type object. */
11970 finish_enum_value_list (tree enumtype)
11973 tree underlying_type;
11976 tree minnode, maxnode;
11979 bool fixed_underlying_type_p
11980 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11982 /* We built up the VALUES in reverse order. */
11983 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11985 /* For an enum defined in a template, just set the type of the values;
11986 all further processing is postponed until the template is
11987 instantiated. We need to set the type so that tsubst of a CONST_DECL
11989 if (processing_template_decl)
11991 for (values = TYPE_VALUES (enumtype);
11993 values = TREE_CHAIN (values))
11994 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11998 /* Determine the minimum and maximum values of the enumerators. */
11999 if (TYPE_VALUES (enumtype))
12001 minnode = maxnode = NULL_TREE;
12003 for (values = TYPE_VALUES (enumtype);
12005 values = TREE_CHAIN (values))
12007 decl = TREE_VALUE (values);
12009 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12010 each enumerator has the type of its enumeration. Prior to the
12011 closing brace, the type of each enumerator is the type of its
12012 initializing value. */
12013 TREE_TYPE (decl) = enumtype;
12015 /* Update the minimum and maximum values, if appropriate. */
12016 value = DECL_INITIAL (decl);
12017 if (value == error_mark_node)
12018 value = integer_zero_node;
12019 /* Figure out what the minimum and maximum values of the
12020 enumerators are. */
12022 minnode = maxnode = value;
12023 else if (tree_int_cst_lt (maxnode, value))
12025 else if (tree_int_cst_lt (value, minnode))
12032 If the enumerator-list is empty, the underlying type is as if
12033 the enumeration had a single enumerator with value 0. */
12034 minnode = maxnode = integer_zero_node;
12036 if (!fixed_underlying_type_p)
12038 /* Compute the number of bits require to represent all values of the
12039 enumeration. We must do this before the type of MINNODE and
12040 MAXNODE are transformed, since tree_int_cst_min_precision relies
12041 on the TREE_TYPE of the value it is passed. */
12042 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
12043 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
12044 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
12045 int precision = MAX (lowprec, highprec);
12047 bool use_short_enum;
12049 /* Determine the underlying type of the enumeration.
12053 The underlying type of an enumeration is an integral type that
12054 can represent all the enumerator values defined in the
12055 enumeration. It is implementation-defined which integral type is
12056 used as the underlying type for an enumeration except that the
12057 underlying type shall not be larger than int unless the value of
12058 an enumerator cannot fit in an int or unsigned int.
12060 We use "int" or an "unsigned int" as the underlying type, even if
12061 a smaller integral type would work, unless the user has
12062 explicitly requested that we use the smallest possible type. The
12063 user can request that for all enumerations with a command line
12064 flag, or for just one enumeration with an attribute. */
12066 use_short_enum = flag_short_enums
12067 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
12069 for (itk = (use_short_enum ? itk_char : itk_int);
12073 underlying_type = integer_types[itk];
12074 if (underlying_type != NULL_TREE
12075 && TYPE_PRECISION (underlying_type) >= precision
12076 && TYPE_UNSIGNED (underlying_type) == unsignedp)
12079 if (itk == itk_none)
12083 IF no integral type can represent all the enumerator values, the
12084 enumeration is ill-formed. */
12085 error ("no integral type can represent all of the enumerator values "
12086 "for %qT", enumtype);
12087 precision = TYPE_PRECISION (long_long_integer_type_node);
12088 underlying_type = integer_types[itk_unsigned_long_long];
12093 The value of sizeof() applied to an enumeration type, an object
12094 of an enumeration type, or an enumerator, is the value of sizeof()
12095 applied to the underlying type. */
12096 copy_type_enum (enumtype, underlying_type);
12098 /* Compute the minimum and maximum values for the type.
12102 For an enumeration where emin is the smallest enumerator and emax
12103 is the largest, the values of the enumeration are the values of the
12104 underlying type in the range bmin to bmax, where bmin and bmax are,
12105 respectively, the smallest and largest values of the smallest bit-
12106 field that can store emin and emax. */
12108 /* The middle-end currently assumes that types with TYPE_PRECISION
12109 narrower than their underlying type are suitably zero or sign
12110 extended to fill their mode. Similarly, it assumes that the front
12111 end assures that a value of a particular type must be within
12112 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12114 We used to set these fields based on bmin and bmax, but that led
12115 to invalid assumptions like optimizing away bounds checking. So
12116 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12117 TYPE_MAX_VALUE to the values for the mode above and only restrict
12118 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12119 ENUM_UNDERLYING_TYPE (enumtype)
12120 = build_distinct_type_copy (underlying_type);
12121 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
12122 set_min_and_max_values_for_integral_type
12123 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
12125 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12126 if (flag_strict_enums)
12127 set_min_and_max_values_for_integral_type (enumtype, precision,
12131 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
12133 /* Convert each of the enumerators to the type of the underlying
12134 type of the enumeration. */
12135 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12137 location_t saved_location;
12139 decl = TREE_VALUE (values);
12140 saved_location = input_location;
12141 input_location = DECL_SOURCE_LOCATION (decl);
12142 if (fixed_underlying_type_p)
12143 /* If the enumeration type has a fixed underlying type, we
12144 already checked all of the enumerator values. */
12145 value = DECL_INITIAL (decl);
12147 value = perform_implicit_conversion (underlying_type,
12148 DECL_INITIAL (decl),
12149 tf_warning_or_error);
12150 input_location = saved_location;
12152 /* Do not clobber shared ints. */
12153 value = copy_node (value);
12155 TREE_TYPE (value) = enumtype;
12156 DECL_INITIAL (decl) = value;
12159 /* Fix up all variant types of this enum type. */
12160 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12161 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12163 /* Finish debugging output for this type. */
12164 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12167 /* Finishes the enum type. This is called only the first time an
12168 enumeration is seen, be it opaque or odinary.
12169 ENUMTYPE is the type object. */
12172 finish_enum (tree enumtype)
12174 if (processing_template_decl)
12176 if (at_function_scope_p ())
12177 add_stmt (build_min (TAG_DEFN, enumtype));
12181 /* Here there should not be any variants of this type. */
12182 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12183 && !TYPE_NEXT_VARIANT (enumtype));
12186 /* Build and install a CONST_DECL for an enumeration constant of the
12187 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12188 LOC is the location of NAME.
12189 Assignment of sequential values by default is handled here. */
12192 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12198 /* If the VALUE was erroneous, pretend it wasn't there; that will
12199 result in the enum being assigned the next value in sequence. */
12200 if (value == error_mark_node)
12203 /* Remove no-op casts from the value. */
12205 STRIP_TYPE_NOPS (value);
12207 if (! processing_template_decl)
12209 /* Validate and default VALUE. */
12210 if (value != NULL_TREE)
12212 value = cxx_constant_value (value);
12214 if (TREE_CODE (value) == INTEGER_CST
12215 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12217 value = perform_integral_promotions (value);
12221 error ("enumerator value for %qD is not an integer constant", name);
12226 /* Default based on previous value. */
12227 if (value == NULL_TREE)
12229 if (TYPE_VALUES (enumtype))
12232 unsigned HOST_WIDE_INT lo;
12236 /* C++03 7.2/4: If no initializer is specified for the first
12237 enumerator, the type is an unspecified integral
12238 type. Otherwise the type is the same as the type of the
12239 initializing value of the preceding enumerator unless the
12240 incremented value is not representable in that type, in
12241 which case the type is an unspecified integral type
12242 sufficient to contain the incremented value. */
12243 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12244 if (error_operand_p (prev_value))
12245 value = error_mark_node;
12248 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12249 TREE_INT_CST_HIGH (prev_value),
12254 tree type = TREE_TYPE (prev_value);
12255 bool pos = (TYPE_UNSIGNED (type) || hi >= 0);
12256 di.low = lo; di.high = hi;
12257 if (!double_int_fits_to_tree_p (type, di))
12260 for (itk = itk_int; itk != itk_none; itk++)
12262 type = integer_types[itk];
12263 if (type != NULL_TREE
12264 && (pos || !TYPE_UNSIGNED (type))
12265 && double_int_fits_to_tree_p (type, di))
12268 if (type && cxx_dialect < cxx0x
12269 && itk > itk_unsigned_long)
12270 pedwarn (input_location, OPT_Wlong_long, pos ? "\
12271 incremented enumerator value is too large for %<unsigned long%>" : "\
12272 incremented enumerator value is too large for %<long%>");
12274 if (type == NULL_TREE)
12277 value = double_int_to_tree (type, di);
12282 error ("overflow in enumeration values at %qD", name);
12283 value = error_mark_node;
12288 value = integer_zero_node;
12291 /* Remove no-op casts from the value. */
12292 STRIP_TYPE_NOPS (value);
12294 /* If the underlying type of the enum is fixed, check whether
12295 the enumerator values fits in the underlying type. If it
12296 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12297 if (ENUM_UNDERLYING_TYPE (enumtype)
12299 && TREE_CODE (value) == INTEGER_CST
12300 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12302 error ("enumerator value %E is too large for underlying type %<%T%>",
12303 value, ENUM_UNDERLYING_TYPE (enumtype));
12305 /* Silently convert the value so that we can continue. */
12306 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12311 /* C++ associates enums with global, function, or class declarations. */
12312 context = current_scope ();
12314 /* Build the actual enumeration constant. Note that the enumeration
12315 constants have the underlying type of the enum (if it is fixed)
12316 or the type of their initializer (if the underlying type of the
12317 enum is not fixed):
12321 If the underlying type is fixed, the type of each enumerator
12322 prior to the closing brace is the underlying type; if the
12323 initializing value of an enumerator cannot be represented by
12324 the underlying type, the program is ill-formed. If the
12325 underlying type is not fixed, the type of each enumerator is
12326 the type of its initializing value.
12328 If the underlying type is not fixed, it will be computed by
12329 finish_enum and we will reset the type of this enumerator. Of
12330 course, if we're processing a template, there may be no value. */
12331 type = value ? TREE_TYPE (value) : NULL_TREE;
12333 if (context && context == current_class_type)
12334 /* This enum declaration is local to the class. We need the full
12335 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12336 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12338 /* It's a global enum, or it's local to a function. (Note local to
12339 a function could mean local to a class method. */
12340 decl = build_decl (loc, CONST_DECL, name, type);
12342 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12343 TREE_CONSTANT (decl) = 1;
12344 TREE_READONLY (decl) = 1;
12345 DECL_INITIAL (decl) = value;
12347 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12348 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12349 on the TYPE_FIELDS list for `S'. (That's so that you can say
12350 things like `S::i' later.) */
12351 finish_member_declaration (decl);
12355 /* Add this enumeration constant to the list for this type. */
12356 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12359 /* Look for an enumerator with the given NAME within the enumeration
12360 type ENUMTYPE. This routine is used primarily for qualified name
12361 lookup into an enumerator in C++0x, e.g.,
12363 enum class Color { Red, Green, Blue };
12365 Color color = Color::Red;
12367 Returns the value corresponding to the enumerator, or
12368 NULL_TREE if no such enumerator was found. */
12370 lookup_enumerator (tree enumtype, tree name)
12373 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12375 e = purpose_member (name, TYPE_VALUES (enumtype));
12376 return e? TREE_VALUE (e) : NULL_TREE;
12380 /* We're defining DECL. Make sure that its type is OK. */
12383 check_function_type (tree decl, tree current_function_parms)
12385 tree fntype = TREE_TYPE (decl);
12386 tree return_type = complete_type (TREE_TYPE (fntype));
12388 /* In a function definition, arg types must be complete. */
12389 require_complete_types_for_parms (current_function_parms);
12391 if (dependent_type_p (return_type))
12393 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12394 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12396 tree args = TYPE_ARG_TYPES (fntype);
12398 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12399 error ("return type %q#T is incomplete", return_type);
12401 error ("return type has Java class type %q#T", return_type);
12403 /* Make it return void instead. */
12404 if (TREE_CODE (fntype) == METHOD_TYPE)
12405 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12407 TREE_CHAIN (args));
12409 fntype = build_function_type (void_type_node, args);
12411 = build_exception_variant (fntype,
12412 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12413 fntype = (cp_build_type_attribute_variant
12414 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12415 TREE_TYPE (decl) = fntype;
12418 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12421 /* Create the FUNCTION_DECL for a function definition.
12422 DECLSPECS and DECLARATOR are the parts of the declaration;
12423 they describe the function's name and the type it returns,
12424 but twisted together in a fashion that parallels the syntax of C.
12426 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12427 DECLARATOR is really the DECL for the function we are about to
12428 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12429 indicating that the function is an inline defined in-class.
12431 This function creates a binding context for the function body
12432 as well as setting up the FUNCTION_DECL in current_function_decl.
12434 For C++, we must first check whether that datum makes any sense.
12435 For example, "class A local_a(1,2);" means that variable local_a
12436 is an aggregate of type A, which should have a constructor
12437 applied to it with the argument list [1, 2].
12439 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12440 or may be a BLOCK if the function has been defined previously
12441 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12442 error_mark_node if the function has never been defined, or
12443 a BLOCK if the function has been defined somewhere. */
12446 start_preparsed_function (tree decl1, tree attrs, int flags)
12448 tree ctype = NULL_TREE;
12451 int doing_friend = 0;
12452 cp_binding_level *bl;
12453 tree current_function_parms;
12454 struct c_fileinfo *finfo
12455 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12456 bool honor_interface;
12458 /* Sanity check. */
12459 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12460 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12462 fntype = TREE_TYPE (decl1);
12463 if (TREE_CODE (fntype) == METHOD_TYPE)
12464 ctype = TYPE_METHOD_BASETYPE (fntype);
12466 /* ISO C++ 11.4/5. A friend function defined in a class is in
12467 the (lexical) scope of the class in which it is defined. */
12468 if (!ctype && DECL_FRIEND_P (decl1))
12470 ctype = DECL_FRIEND_CONTEXT (decl1);
12472 /* CTYPE could be null here if we're dealing with a template;
12473 for example, `inline friend float foo()' inside a template
12474 will have no CTYPE set. */
12475 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12481 if (DECL_DECLARED_INLINE_P (decl1)
12482 && lookup_attribute ("noinline", attrs))
12483 warning (0, "inline function %q+D given attribute noinline", decl1);
12485 /* Handle gnu_inline attribute. */
12486 if (GNU_INLINE_P (decl1))
12488 DECL_EXTERNAL (decl1) = 1;
12489 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12490 DECL_INTERFACE_KNOWN (decl1) = 1;
12491 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12494 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12495 /* This is a constructor, we must ensure that any default args
12496 introduced by this definition are propagated to the clones
12497 now. The clones are used directly in overload resolution. */
12498 adjust_clone_args (decl1);
12500 /* Sometimes we don't notice that a function is a static member, and
12501 build a METHOD_TYPE for it. Fix that up now. */
12502 gcc_assert (!(ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12503 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE));
12505 /* Set up current_class_type, and enter the scope of the class, if
12508 push_nested_class (ctype);
12509 else if (DECL_STATIC_FUNCTION_P (decl1))
12510 push_nested_class (DECL_CONTEXT (decl1));
12512 /* Now that we have entered the scope of the class, we must restore
12513 the bindings for any template parameters surrounding DECL1, if it
12514 is an inline member template. (Order is important; consider the
12515 case where a template parameter has the same name as a field of
12516 the class.) It is not until after this point that
12517 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12518 if (flags & SF_INCLASS_INLINE)
12519 maybe_begin_member_template_processing (decl1);
12521 /* Effective C++ rule 15. */
12523 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12524 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12525 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12527 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12528 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12529 if (!DECL_INITIAL (decl1))
12530 DECL_INITIAL (decl1) = error_mark_node;
12532 /* This function exists in static storage.
12533 (This does not mean `static' in the C sense!) */
12534 TREE_STATIC (decl1) = 1;
12536 /* We must call push_template_decl after current_class_type is set
12537 up. (If we are processing inline definitions after exiting a
12538 class scope, current_class_type will be NULL_TREE until set above
12539 by push_nested_class.) */
12540 if (processing_template_decl)
12542 /* FIXME: Handle error_mark_node more gracefully. */
12543 tree newdecl1 = push_template_decl (decl1);
12544 if (newdecl1 != error_mark_node)
12548 /* We are now in the scope of the function being defined. */
12549 current_function_decl = decl1;
12551 /* Save the parm names or decls from this function's declarator
12552 where store_parm_decls will find them. */
12553 current_function_parms = DECL_ARGUMENTS (decl1);
12555 /* Make sure the parameter and return types are reasonable. When
12556 you declare a function, these types can be incomplete, but they
12557 must be complete when you define the function. */
12558 check_function_type (decl1, current_function_parms);
12560 /* Build the return declaration for the function. */
12561 restype = TREE_TYPE (fntype);
12562 if (DECL_RESULT (decl1) == NULL_TREE)
12566 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12567 DECL_ARTIFICIAL (resdecl) = 1;
12568 DECL_IGNORED_P (resdecl) = 1;
12569 DECL_RESULT (decl1) = resdecl;
12571 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12574 /* Let the user know we're compiling this function. */
12575 announce_function (decl1);
12577 /* Record the decl so that the function name is defined.
12578 If we already have a decl for this name, and it is a FUNCTION_DECL,
12579 use the old decl. */
12580 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12582 /* A specialization is not used to guide overload resolution. */
12583 if (!DECL_FUNCTION_MEMBER_P (decl1)
12584 && !(DECL_USE_TEMPLATE (decl1) &&
12585 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12587 tree olddecl = pushdecl (decl1);
12589 if (olddecl == error_mark_node)
12590 /* If something went wrong when registering the declaration,
12591 use DECL1; we have to have a FUNCTION_DECL to use when
12592 parsing the body of the function. */
12596 /* Otherwise, OLDDECL is either a previous declaration
12597 of the same function or DECL1 itself. */
12599 if (warn_missing_declarations
12600 && olddecl == decl1
12601 && !DECL_MAIN_P (decl1)
12602 && TREE_PUBLIC (decl1)
12603 && !DECL_DECLARED_INLINE_P (decl1))
12607 /* Check whether DECL1 is in an anonymous
12609 for (context = DECL_CONTEXT (decl1);
12611 context = DECL_CONTEXT (context))
12613 if (TREE_CODE (context) == NAMESPACE_DECL
12614 && DECL_NAME (context) == NULL_TREE)
12618 if (context == NULL)
12619 warning (OPT_Wmissing_declarations,
12620 "no previous declaration for %q+D", decl1);
12628 /* We need to set the DECL_CONTEXT. */
12629 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12630 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12632 fntype = TREE_TYPE (decl1);
12634 /* If #pragma weak applies, mark the decl appropriately now.
12635 The pragma only applies to global functions. Because
12636 determining whether or not the #pragma applies involves
12637 computing the mangled name for the declaration, we cannot
12638 apply the pragma until after we have merged this declaration
12639 with any previous declarations; if the original declaration
12640 has a linkage specification, that specification applies to
12641 the definition as well, and may affect the mangled name. */
12642 if (DECL_FILE_SCOPE_P (decl1))
12643 maybe_apply_pragma_weak (decl1);
12646 /* constexpr functions must have literal argument types and
12647 literal return type. */
12648 validate_constexpr_fundecl (decl1);
12650 /* Reset this in case the call to pushdecl changed it. */
12651 current_function_decl = decl1;
12653 gcc_assert (DECL_INITIAL (decl1));
12655 /* This function may already have been parsed, in which case just
12656 return; our caller will skip over the body without parsing. */
12657 if (DECL_INITIAL (decl1) != error_mark_node)
12660 /* Initialize RTL machinery. We cannot do this until
12661 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12662 even when processing a template; this is how we get
12663 CFUN set up, and our per-function variables initialized.
12664 FIXME factor out the non-RTL stuff. */
12665 bl = current_binding_level;
12666 allocate_struct_function (decl1, processing_template_decl);
12668 /* Initialize the language data structures. Whenever we start
12669 a new function, we destroy temporaries in the usual way. */
12670 cfun->language = ggc_alloc_cleared_language_function ();
12671 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12672 current_binding_level = bl;
12674 /* Start the statement-tree, start the tree now. */
12675 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12677 /* If we are (erroneously) defining a function that we have already
12678 defined before, wipe out what we knew before. */
12679 if (!DECL_PENDING_INLINE_P (decl1))
12680 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12682 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12684 /* We know that this was set up by `grokclassfn'. We do not
12685 wait until `store_parm_decls', since evil parse errors may
12686 never get us to that point. Here we keep the consistency
12687 between `current_class_type' and `current_class_ptr'. */
12688 tree t = DECL_ARGUMENTS (decl1);
12690 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12691 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12693 cp_function_chain->x_current_class_ref
12694 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12695 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12696 cp_function_chain->x_current_class_ptr = t;
12698 /* Constructors and destructors need to know whether they're "in
12699 charge" of initializing virtual base classes. */
12700 t = DECL_CHAIN (t);
12701 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12703 current_in_charge_parm = t;
12704 t = DECL_CHAIN (t);
12706 if (DECL_HAS_VTT_PARM_P (decl1))
12708 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12709 current_vtt_parm = t;
12713 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12714 /* Implicitly-defined methods (like the
12715 destructor for a class in which no destructor
12716 is explicitly declared) must not be defined
12717 until their definition is needed. So, we
12718 ignore interface specifications for
12719 compiler-generated functions. */
12720 && !DECL_ARTIFICIAL (decl1));
12722 if (processing_template_decl)
12723 /* Don't mess with interface flags. */;
12724 else if (DECL_INTERFACE_KNOWN (decl1))
12726 tree ctx = decl_function_context (decl1);
12728 if (DECL_NOT_REALLY_EXTERN (decl1))
12729 DECL_EXTERNAL (decl1) = 0;
12731 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12732 && TREE_PUBLIC (ctx))
12733 /* This is a function in a local class in an extern inline
12735 comdat_linkage (decl1);
12737 /* If this function belongs to an interface, it is public.
12738 If it belongs to someone else's interface, it is also external.
12739 This only affects inlines and template instantiations. */
12740 else if (!finfo->interface_unknown && honor_interface)
12742 if (DECL_DECLARED_INLINE_P (decl1)
12743 || DECL_TEMPLATE_INSTANTIATION (decl1))
12745 DECL_EXTERNAL (decl1)
12746 = (finfo->interface_only
12747 || (DECL_DECLARED_INLINE_P (decl1)
12748 && ! flag_implement_inlines
12749 && !DECL_VINDEX (decl1)));
12751 /* For WIN32 we also want to put these in linkonce sections. */
12752 maybe_make_one_only (decl1);
12755 DECL_EXTERNAL (decl1) = 0;
12756 DECL_INTERFACE_KNOWN (decl1) = 1;
12757 /* If this function is in an interface implemented in this file,
12758 make sure that the back end knows to emit this function
12760 if (!DECL_EXTERNAL (decl1))
12761 mark_needed (decl1);
12763 else if (finfo->interface_unknown && finfo->interface_only
12764 && honor_interface)
12766 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12767 interface, we will have both finfo->interface_unknown and
12768 finfo->interface_only set. In that case, we don't want to
12769 use the normal heuristics because someone will supply a
12770 #pragma implementation elsewhere, and deducing it here would
12771 produce a conflict. */
12772 comdat_linkage (decl1);
12773 DECL_EXTERNAL (decl1) = 0;
12774 DECL_INTERFACE_KNOWN (decl1) = 1;
12775 DECL_DEFER_OUTPUT (decl1) = 1;
12779 /* This is a definition, not a reference.
12780 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12781 if (!GNU_INLINE_P (decl1))
12782 DECL_EXTERNAL (decl1) = 0;
12784 if ((DECL_DECLARED_INLINE_P (decl1)
12785 || DECL_TEMPLATE_INSTANTIATION (decl1))
12786 && ! DECL_INTERFACE_KNOWN (decl1))
12787 DECL_DEFER_OUTPUT (decl1) = 1;
12789 DECL_INTERFACE_KNOWN (decl1) = 1;
12792 /* Determine the ELF visibility attribute for the function. We must not
12793 do this before calling "pushdecl", as we must allow "duplicate_decls"
12794 to merge any attributes appropriately. We also need to wait until
12796 if (!DECL_CLONED_FUNCTION_P (decl1))
12797 determine_visibility (decl1);
12799 begin_scope (sk_function_parms, decl1);
12803 if (DECL_DESTRUCTOR_P (decl1)
12804 || (DECL_CONSTRUCTOR_P (decl1)
12805 && targetm.cxx.cdtor_returns_this ()))
12807 cdtor_label = build_decl (input_location,
12808 LABEL_DECL, NULL_TREE, NULL_TREE);
12809 DECL_CONTEXT (cdtor_label) = current_function_decl;
12812 start_fname_decls ();
12814 store_parm_decls (current_function_parms);
12818 /* Like start_preparsed_function, except that instead of a
12819 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12821 Returns 1 on success. If the DECLARATOR is not suitable for a function
12822 (it defines a datum instead), we return 0, which tells
12823 yyparse to report a parse error. */
12826 start_function (cp_decl_specifier_seq *declspecs,
12827 const cp_declarator *declarator,
12832 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12833 if (decl1 == error_mark_node)
12835 /* If the declarator is not suitable for a function definition,
12836 cause a syntax error. */
12837 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12839 error ("invalid function declaration");
12843 if (DECL_MAIN_P (decl1))
12844 /* main must return int. grokfndecl should have corrected it
12845 (and issued a diagnostic) if the user got it wrong. */
12846 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12847 integer_type_node));
12849 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12854 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12858 use_eh_spec_block (tree fn)
12860 return (flag_exceptions && flag_enforce_eh_specs
12861 && !processing_template_decl
12862 && !type_throw_all_p (TREE_TYPE (fn))
12863 /* We insert the EH_SPEC_BLOCK only in the original
12864 function; then, it is copied automatically to the
12866 && !DECL_CLONED_FUNCTION_P (fn)
12867 /* Implicitly-generated constructors and destructors have
12868 exception specifications. However, those specifications
12869 are the union of the possible exceptions specified by the
12870 constructors/destructors for bases and members, so no
12871 unallowed exception will ever reach this function. By
12872 not creating the EH_SPEC_BLOCK we save a little memory,
12873 and we avoid spurious warnings about unreachable
12875 && !DECL_DEFAULTED_FN (fn));
12878 /* Store the parameter declarations into the current function declaration.
12879 This is called after parsing the parameter declarations, before
12880 digesting the body of the function.
12882 Also install to binding contour return value identifier, if any. */
12885 store_parm_decls (tree current_function_parms)
12887 tree fndecl = current_function_decl;
12890 /* This is a chain of any other decls that came in among the parm
12891 declarations. If a parm is declared with enum {foo, bar} x;
12892 then CONST_DECLs for foo and bar are put here. */
12893 tree nonparms = NULL_TREE;
12895 if (current_function_parms)
12897 /* This case is when the function was defined with an ANSI prototype.
12898 The parms already have decls, so we need not do anything here
12899 except record them as in effect
12900 and complain if any redundant old-style parm decls were written. */
12902 tree specparms = current_function_parms;
12905 /* Must clear this because it might contain TYPE_DECLs declared
12907 current_binding_level->names = NULL;
12909 /* If we're doing semantic analysis, then we'll call pushdecl
12910 for each of these. We must do them in reverse order so that
12911 they end in the correct forward order. */
12912 specparms = nreverse (specparms);
12914 for (parm = specparms; parm; parm = next)
12916 next = DECL_CHAIN (parm);
12917 if (TREE_CODE (parm) == PARM_DECL)
12919 if (DECL_NAME (parm) == NULL_TREE
12920 || TREE_CODE (parm) != VOID_TYPE)
12923 error ("parameter %qD declared void", parm);
12927 /* If we find an enum constant or a type tag,
12928 put it aside for the moment. */
12929 TREE_CHAIN (parm) = NULL_TREE;
12930 nonparms = chainon (nonparms, parm);
12934 /* Get the decls in their original chain order and record in the
12935 function. This is all and only the PARM_DECLs that were
12936 pushed into scope by the loop above. */
12937 DECL_ARGUMENTS (fndecl) = getdecls ();
12940 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12942 /* Now store the final chain of decls for the arguments
12943 as the decl-chain of the current lexical scope.
12944 Put the enumerators in as well, at the front so that
12945 DECL_ARGUMENTS is not modified. */
12946 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12948 if (use_eh_spec_block (current_function_decl))
12949 current_eh_spec_block = begin_eh_spec_block ();
12953 /* We have finished doing semantic analysis on DECL, but have not yet
12954 generated RTL for its body. Save away our current state, so that
12955 when we want to generate RTL later we know what to do. */
12958 save_function_data (tree decl)
12960 struct language_function *f;
12962 /* Save the language-specific per-function data so that we can
12963 get it back when we really expand this function. */
12964 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12967 f = ggc_alloc_language_function ();
12968 memcpy (f, cp_function_chain, sizeof (struct language_function));
12969 DECL_SAVED_FUNCTION_DATA (decl) = f;
12971 /* Clear out the bits we don't need. */
12972 f->base.x_stmt_tree.x_cur_stmt_list = NULL;
12973 f->bindings = NULL;
12974 f->x_local_names = NULL;
12978 /* Set the return value of the constructor (if present). */
12981 finish_constructor_body (void)
12986 if (targetm.cxx.cdtor_returns_this ()
12987 && (! TYPE_FOR_JAVA (current_class_type)))
12989 /* Any return from a constructor will end up here. */
12990 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12992 val = DECL_ARGUMENTS (current_function_decl);
12993 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12994 DECL_RESULT (current_function_decl), val);
12995 /* Return the address of the object. */
12996 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12997 add_stmt (exprstmt);
13001 /* Do all the processing for the beginning of a destructor; set up the
13002 vtable pointers and cleanups for bases and members. */
13005 begin_destructor_body (void)
13007 tree compound_stmt;
13009 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13010 issued an error message. We still want to try to process the
13011 body of the function, but initialize_vtbl_ptrs will crash if
13012 TYPE_BINFO is NULL. */
13013 if (COMPLETE_TYPE_P (current_class_type))
13015 compound_stmt = begin_compound_stmt (0);
13016 /* Make all virtual function table pointers in non-virtual base
13017 classes point to CURRENT_CLASS_TYPE's virtual function
13019 initialize_vtbl_ptrs (current_class_ptr);
13020 finish_compound_stmt (compound_stmt);
13022 /* And insert cleanups for our bases and members so that they
13023 will be properly destroyed if we throw. */
13024 push_base_cleanups ();
13028 /* At the end of every destructor we generate code to delete the object if
13029 necessary. Do that now. */
13032 finish_destructor_body (void)
13036 /* Any return from a destructor will end up here; that way all base
13037 and member cleanups will be run when the function returns. */
13038 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
13040 /* In a virtual destructor, we must call delete. */
13041 if (DECL_VIRTUAL_P (current_function_decl))
13044 tree virtual_size = cxx_sizeof (current_class_type);
13048 At the point of definition of a virtual destructor (including
13049 an implicit definition), non-placement operator delete shall
13050 be looked up in the scope of the destructor's class and if
13051 found shall be accessible and unambiguous. */
13052 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
13054 /*global_p=*/false,
13055 /*placement=*/NULL_TREE,
13056 /*alloc_fn=*/NULL_TREE);
13058 if_stmt = begin_if_stmt ();
13059 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
13060 current_in_charge_parm,
13063 finish_expr_stmt (exprstmt);
13064 finish_then_clause (if_stmt);
13065 finish_if_stmt (if_stmt);
13068 if (targetm.cxx.cdtor_returns_this ())
13072 val = DECL_ARGUMENTS (current_function_decl);
13073 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
13074 DECL_RESULT (current_function_decl), val);
13075 /* Return the address of the object. */
13076 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
13077 add_stmt (exprstmt);
13081 /* Do the necessary processing for the beginning of a function body, which
13082 in this case includes member-initializers, but not the catch clauses of
13083 a function-try-block. Currently, this means opening a binding level
13084 for the member-initializers (in a ctor), member cleanups (in a dtor),
13085 and capture proxies (in a lambda operator()). */
13088 begin_function_body (void)
13092 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13095 if (processing_template_decl)
13096 /* Do nothing now. */;
13098 /* Always keep the BLOCK node associated with the outermost pair of
13099 curly braces of a function. These are needed for correct
13100 operation of dwarfout.c. */
13101 keep_next_level (true);
13103 stmt = begin_compound_stmt (BCS_FN_BODY);
13105 if (processing_template_decl)
13106 /* Do nothing now. */;
13107 else if (DECL_DESTRUCTOR_P (current_function_decl))
13108 begin_destructor_body ();
13113 /* Do the processing for the end of a function body. Currently, this means
13114 closing out the cleanups for fully-constructed bases and members, and in
13115 the case of the destructor, deleting the object if desired. Again, this
13116 is only meaningful for [cd]tors, since they are the only functions where
13117 there is a significant distinction between the main body and any
13118 function catch clauses. Handling, say, main() return semantics here
13119 would be wrong, as flowing off the end of a function catch clause for
13120 main() would also need to return 0. */
13123 finish_function_body (tree compstmt)
13125 if (compstmt == NULL_TREE)
13128 /* Close the block. */
13129 finish_compound_stmt (compstmt);
13131 if (processing_template_decl)
13132 /* Do nothing now. */;
13133 else if (DECL_CONSTRUCTOR_P (current_function_decl))
13134 finish_constructor_body ();
13135 else if (DECL_DESTRUCTOR_P (current_function_decl))
13136 finish_destructor_body ();
13139 /* Given a function, returns the BLOCK corresponding to the outermost level
13140 of curly braces, skipping the artificial block created for constructor
13144 outer_curly_brace_block (tree fndecl)
13146 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
13147 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13148 /* Skip the artificial function body block. */
13149 block = BLOCK_SUBBLOCKS (block);
13153 /* If FNDECL is a class's key method, add the class to the list of
13154 keyed classes that should be emitted. */
13157 record_key_method_defined (tree fndecl)
13159 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
13160 && DECL_VIRTUAL_P (fndecl)
13161 && !processing_template_decl)
13163 tree fnclass = DECL_CONTEXT (fndecl);
13164 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
13165 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
13169 /* Subroutine of finish_function.
13170 Save the body of constexpr functions for possible
13171 future compile time evaluation. */
13174 maybe_save_function_definition (tree fun)
13176 if (!processing_template_decl
13177 && DECL_DECLARED_CONSTEXPR_P (fun)
13178 && !DECL_CLONED_FUNCTION_P (fun))
13179 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13182 /* Finish up a function declaration and compile that function
13183 all the way to assembler language output. The free the storage
13184 for the function definition.
13186 FLAGS is a bitwise or of the following values:
13188 We just finished processing the body of an in-class inline
13189 function definition. (This processing will have taken place
13190 after the class definition is complete.) */
13193 finish_function (int flags)
13195 tree fndecl = current_function_decl;
13196 tree fntype, ctype = NULL_TREE;
13197 int inclass_inline = (flags & 2) != 0;
13199 /* When we get some parse errors, we can end up without a
13200 current_function_decl, so cope. */
13201 if (fndecl == NULL_TREE)
13202 return error_mark_node;
13204 if (c_dialect_objc ())
13205 objc_finish_function ();
13207 gcc_assert (!defer_mark_used_calls);
13208 defer_mark_used_calls = true;
13210 record_key_method_defined (fndecl);
13212 fntype = TREE_TYPE (fndecl);
13214 /* TREE_READONLY (fndecl) = 1;
13215 This caused &foo to be of type ptr-to-const-function
13216 which then got a warning when stored in a ptr-to-function variable. */
13218 gcc_assert (building_stmt_list_p ());
13219 /* The current function is being defined, so its DECL_INITIAL should
13220 be set, and unless there's a multiple definition, it should be
13221 error_mark_node. */
13222 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13224 /* For a cloned function, we've already got all the code we need;
13225 there's no need to add any extra bits. */
13226 if (!DECL_CLONED_FUNCTION_P (fndecl))
13228 if (DECL_MAIN_P (current_function_decl))
13230 /* Make it so that `main' always returns 0 by default (or
13233 finish_return_stmt (integer_one_node);
13235 finish_return_stmt (integer_zero_node);
13239 if (use_eh_spec_block (current_function_decl))
13240 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13241 (TREE_TYPE (current_function_decl)),
13242 current_eh_spec_block);
13245 /* If we're saving up tree structure, tie off the function now. */
13246 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13248 finish_fname_decls ();
13250 /* If this function can't throw any exceptions, remember that. */
13251 if (!processing_template_decl
13252 && !cp_function_chain->can_throw
13253 && !flag_non_call_exceptions
13254 && !decl_replaceable_p (fndecl))
13255 TREE_NOTHROW (fndecl) = 1;
13257 /* This must come after expand_function_end because cleanups might
13258 have declarations (from inline functions) that need to go into
13259 this function's blocks. */
13261 /* If the current binding level isn't the outermost binding level
13262 for this function, either there is a bug, or we have experienced
13263 syntax errors and the statement tree is malformed. */
13264 if (current_binding_level->kind != sk_function_parms)
13266 /* Make sure we have already experienced errors. */
13267 gcc_assert (errorcount);
13269 /* Throw away the broken statement tree and extra binding
13271 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13273 while (current_binding_level->kind != sk_function_parms)
13275 if (current_binding_level->kind == sk_class)
13276 pop_nested_class ();
13278 poplevel (0, 0, 0);
13281 poplevel (1, 0, 1);
13283 /* Statements should always be full-expressions at the outermost set
13284 of curly braces for a function. */
13285 gcc_assert (stmts_are_full_exprs_p ());
13287 /* Save constexpr function body before it gets munged by
13288 the NRV transformation. */
13289 maybe_save_function_definition (fndecl);
13291 /* Set up the named return value optimization, if we can. Candidate
13292 variables are selected in check_return_expr. */
13293 if (current_function_return_value)
13295 tree r = current_function_return_value;
13298 if (r != error_mark_node
13299 /* This is only worth doing for fns that return in memory--and
13300 simpler, since we don't have to worry about promoted modes. */
13301 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13302 /* Only allow this for variables declared in the outer scope of
13303 the function so we know that their lifetime always ends with a
13304 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13305 we were to do this optimization in tree-ssa. */
13306 && (outer = outer_curly_brace_block (fndecl))
13307 && chain_member (r, BLOCK_VARS (outer)))
13308 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13310 current_function_return_value = NULL_TREE;
13313 /* Remember that we were in class scope. */
13314 if (current_class_name)
13315 ctype = current_class_type;
13317 /* Must mark the RESULT_DECL as being in this function. */
13318 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13320 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13321 to the FUNCTION_DECL node itself. */
13322 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13324 /* Save away current state, if appropriate. */
13325 if (!processing_template_decl)
13326 save_function_data (fndecl);
13328 /* Complain if there's just no return statement. */
13329 if (warn_return_type
13330 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13331 && !dependent_type_p (TREE_TYPE (fntype))
13332 && !current_function_returns_value && !current_function_returns_null
13333 /* Don't complain if we abort or throw. */
13334 && !current_function_returns_abnormally
13335 /* Don't complain if we are declared noreturn. */
13336 && !TREE_THIS_VOLATILE (fndecl)
13337 && !DECL_NAME (DECL_RESULT (fndecl))
13338 && !TREE_NO_WARNING (fndecl)
13339 /* Structor return values (if any) are set by the compiler. */
13340 && !DECL_CONSTRUCTOR_P (fndecl)
13341 && !DECL_DESTRUCTOR_P (fndecl))
13343 warning (OPT_Wreturn_type,
13344 "no return statement in function returning non-void");
13345 TREE_NO_WARNING (fndecl) = 1;
13348 /* Store the end of the function, so that we get good line number
13349 info for the epilogue. */
13350 cfun->function_end_locus = input_location;
13352 /* Complain about parameters that are only set, but never otherwise used. */
13353 if (warn_unused_but_set_parameter
13354 && !processing_template_decl
13355 && errorcount == unused_but_set_errorcount
13356 && !DECL_CLONED_FUNCTION_P (fndecl))
13360 for (decl = DECL_ARGUMENTS (fndecl);
13362 decl = DECL_CHAIN (decl))
13363 if (TREE_USED (decl)
13364 && TREE_CODE (decl) == PARM_DECL
13365 && !DECL_READ_P (decl)
13366 && DECL_NAME (decl)
13367 && !DECL_ARTIFICIAL (decl)
13368 && !TREE_NO_WARNING (decl)
13369 && !DECL_IN_SYSTEM_HEADER (decl)
13370 && TREE_TYPE (decl) != error_mark_node
13371 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13372 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13373 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13374 warning (OPT_Wunused_but_set_parameter,
13375 "parameter %q+D set but not used", decl);
13376 unused_but_set_errorcount = errorcount;
13379 /* Genericize before inlining. */
13380 if (!processing_template_decl)
13382 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13383 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13384 cp_genericize (fndecl);
13385 /* Clear out the bits we don't need. */
13386 f->x_current_class_ptr = NULL;
13387 f->x_current_class_ref = NULL;
13388 f->x_eh_spec_block = NULL;
13389 f->x_in_charge_parm = NULL;
13390 f->x_vtt_parm = NULL;
13391 f->x_return_value = NULL;
13392 f->bindings = NULL;
13393 f->extern_decl_map = NULL;
13395 /* Clear out the bits we don't need. */
13396 local_names = NULL;
13398 /* We're leaving the context of this function, so zap cfun. It's still in
13399 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13401 current_function_decl = NULL;
13403 /* If this is an in-class inline definition, we may have to pop the
13404 bindings for the template parameters that we added in
13405 maybe_begin_member_template_processing when start_function was
13407 if (inclass_inline)
13408 maybe_end_member_template_processing ();
13410 /* Leave the scope of the class. */
13412 pop_nested_class ();
13417 current_function_decl = NULL_TREE;
13419 defer_mark_used_calls = false;
13420 if (deferred_mark_used_calls)
13425 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13427 VEC_free (tree, gc, deferred_mark_used_calls);
13433 /* Create the FUNCTION_DECL for a function definition.
13434 DECLSPECS and DECLARATOR are the parts of the declaration;
13435 they describe the return type and the name of the function,
13436 but twisted together in a fashion that parallels the syntax of C.
13438 This function creates a binding context for the function body
13439 as well as setting up the FUNCTION_DECL in current_function_decl.
13441 Returns a FUNCTION_DECL on success.
13443 If the DECLARATOR is not suitable for a function (it defines a datum
13444 instead), we return 0, which tells yyparse to report a parse error.
13446 May return void_type_node indicating that this method is actually
13447 a friend. See grokfield for more details.
13449 Came here with a `.pushlevel' .
13451 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13452 CHANGES TO CODE IN `grokfield'. */
13455 grokmethod (cp_decl_specifier_seq *declspecs,
13456 const cp_declarator *declarator, tree attrlist)
13458 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13461 if (fndecl == error_mark_node)
13462 return error_mark_node;
13464 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13466 error ("invalid member function declaration");
13467 return error_mark_node;
13471 cplus_decl_attributes (&fndecl, attrlist, 0);
13473 /* Pass friends other than inline friend functions back. */
13474 if (fndecl == void_type_node)
13477 if (DECL_IN_AGGR_P (fndecl))
13479 if (DECL_CLASS_SCOPE_P (fndecl))
13480 error ("%qD is already defined in class %qT", fndecl,
13481 DECL_CONTEXT (fndecl));
13482 return error_mark_node;
13485 check_template_shadow (fndecl);
13487 DECL_DECLARED_INLINE_P (fndecl) = 1;
13488 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13490 /* We process method specializations in finish_struct_1. */
13491 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13493 fndecl = push_template_decl (fndecl);
13494 if (fndecl == error_mark_node)
13498 if (! DECL_FRIEND_P (fndecl))
13500 if (DECL_CHAIN (fndecl))
13502 fndecl = copy_node (fndecl);
13503 TREE_CHAIN (fndecl) = NULL_TREE;
13507 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13509 DECL_IN_AGGR_P (fndecl) = 1;
13514 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13515 we can lay it out later, when and if its type becomes complete. */
13518 maybe_register_incomplete_var (tree var)
13520 gcc_assert (TREE_CODE (var) == VAR_DECL);
13522 /* Keep track of variables with incomplete types. */
13523 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13524 && DECL_EXTERNAL (var))
13526 tree inner_type = TREE_TYPE (var);
13528 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13529 inner_type = TREE_TYPE (inner_type);
13530 inner_type = TYPE_MAIN_VARIANT (inner_type);
13532 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13533 /* RTTI TD entries are created while defining the type_info. */
13534 || (TYPE_LANG_SPECIFIC (inner_type)
13535 && TYPE_BEING_DEFINED (inner_type)))
13538 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13540 iv->incomplete_type = inner_type;
13545 /* Called when a class type (given by TYPE) is defined. If there are
13546 any existing VAR_DECLs whose type has been completed by this
13547 declaration, update them now. */
13550 complete_vars (tree type)
13553 incomplete_var *iv;
13555 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13557 if (same_type_p (type, iv->incomplete_type))
13559 tree var = iv->decl;
13560 tree type = TREE_TYPE (var);
13561 /* Complete the type of the variable. The VAR_DECL itself
13562 will be laid out in expand_expr. */
13563 complete_type (type);
13564 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13565 /* Remove this entry from the list. */
13566 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13572 /* Check for pending declarations which may have abstract type. */
13573 complete_type_check_abstract (type);
13576 /* If DECL is of a type which needs a cleanup, build and return an
13577 expression to perform that cleanup here. Return NULL_TREE if no
13578 cleanup need be done. */
13581 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13587 /* Assume no cleanup is required. */
13588 cleanup = NULL_TREE;
13590 if (error_operand_p (decl))
13593 /* Handle "__attribute__((cleanup))". We run the cleanup function
13594 before the destructor since the destructor is what actually
13595 terminates the lifetime of the object. */
13596 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13603 /* Get the name specified by the user for the cleanup function. */
13604 id = TREE_VALUE (TREE_VALUE (attr));
13605 /* Look up the name to find the cleanup function to call. It is
13606 important to use lookup_name here because that is what is
13607 used in c-common.c:handle_cleanup_attribute when performing
13608 initial checks on the attribute. Note that those checks
13609 include ensuring that the function found is not an overloaded
13610 function, or an object with an overloaded call operator,
13611 etc.; we can rely on the fact that the function found is an
13612 ordinary FUNCTION_DECL. */
13613 fn = lookup_name (id);
13614 arg = build_address (decl);
13616 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13617 if (cleanup == error_mark_node)
13618 return error_mark_node;
13620 /* Handle ordinary C++ destructors. */
13621 type = TREE_TYPE (decl);
13622 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13624 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13625 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13626 && CLASSTYPE_VBASECLASSES (type));
13630 if (TREE_CODE (type) == ARRAY_TYPE)
13633 addr = build_address (decl);
13635 /* Optimize for space over speed here. */
13636 if (!has_vbases || flag_expensive_optimizations)
13637 flags |= LOOKUP_NONVIRTUAL;
13639 call = build_delete (TREE_TYPE (addr), addr,
13640 sfk_complete_destructor, flags, 0, complain);
13641 if (call == error_mark_node)
13642 cleanup = error_mark_node;
13644 cleanup = cp_build_compound_expr (cleanup, call, complain);
13652 /* When a stmt has been parsed, this function is called. */
13659 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13660 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13661 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13664 static_fn_type (tree memfntype)
13669 if (TYPE_PTRMEMFUNC_P (memfntype))
13670 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13671 if (POINTER_TYPE_P (memfntype)
13672 || TREE_CODE (memfntype) == FUNCTION_DECL)
13673 memfntype = TREE_TYPE (memfntype);
13674 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13676 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13677 args = TYPE_ARG_TYPES (memfntype);
13678 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13679 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13680 fntype = (cp_build_type_attribute_variant
13681 (fntype, TYPE_ATTRIBUTES (memfntype)));
13682 fntype = (build_exception_variant
13683 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13687 /* DECL was originally constructed as a non-static member function,
13688 but turned out to be static. Update it accordingly. */
13691 revert_static_member_fn (tree decl)
13693 tree stype = static_fn_type (decl);
13694 cp_cv_quals quals = type_memfn_quals (stype);
13696 if (quals != TYPE_UNQUALIFIED)
13697 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13699 TREE_TYPE (decl) = stype;
13701 if (DECL_ARGUMENTS (decl))
13702 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13703 DECL_STATIC_FUNCTION_P (decl) = 1;
13706 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13707 one of the language-independent trees. */
13709 enum cp_tree_node_structure_enum
13710 cp_tree_node_structure (union lang_tree_node * t)
13712 switch (TREE_CODE (&t->generic))
13714 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13715 case DEFERRED_NOEXCEPT: return TS_CP_DEFERRED_NOEXCEPT;
13716 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13717 case OVERLOAD: return TS_CP_OVERLOAD;
13718 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13719 case PTRMEM_CST: return TS_CP_PTRMEM;
13720 case BASELINK: return TS_CP_BASELINK;
13721 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13722 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13723 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13724 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13725 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13726 default: return TS_CP_GENERIC;
13730 /* Build the void_list_node (void_type_node having been created). */
13732 build_void_list_node (void)
13734 tree t = build_tree_list (NULL_TREE, void_type_node);
13739 cp_missing_noreturn_ok_p (tree decl)
13741 /* A missing noreturn is ok for the `main' function. */
13742 return DECL_MAIN_P (decl);
13745 /* Return the COMDAT group into which DECL should be placed. */
13748 cxx_comdat_group (tree decl)
13752 /* Virtual tables, construction virtual tables, and virtual table
13753 tables all go in a single COMDAT group, named after the primary
13755 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13756 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13757 /* For all other DECLs, the COMDAT group is the mangled name of the
13758 declaration itself. */
13761 while (DECL_THUNK_P (decl))
13763 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13764 into the same section as the target function. In that case
13765 we must return target's name. */
13766 tree target = THUNK_TARGET (decl);
13767 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13768 && DECL_SECTION_NAME (target) != NULL
13769 && DECL_ONE_ONLY (target))
13774 name = DECL_ASSEMBLER_NAME (decl);
13780 #include "gt-cp-decl.h"