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 void record_unknown_type (tree, const char *);
78 static tree builtin_function_1 (tree, tree, bool);
79 static tree build_library_fn_1 (tree, enum tree_code, tree);
80 static int member_function_or_else (tree, tree, enum overload_flags);
81 static void bad_specifiers (tree, enum bad_spec_place, int, int, int, int,
83 static void check_for_uninitialized_const_var (tree);
84 static hashval_t typename_hash (const void *);
85 static int typename_compare (const void *, const void *);
86 static tree local_variable_p_walkfn (tree *, int *, void *);
87 static tree record_builtin_java_type (const char *, int);
88 static const char *tag_name (enum tag_types);
89 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
90 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
91 static void maybe_deduce_size_from_array_init (tree, tree);
92 static void layout_var_decl (tree);
93 static tree check_initializer (tree, tree, int, tree *);
94 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
95 static void save_function_data (tree);
96 static void copy_type_enum (tree , tree);
97 static void check_function_type (tree, tree);
98 static void finish_constructor_body (void);
99 static void begin_destructor_body (void);
100 static void finish_destructor_body (void);
101 static void record_key_method_defined (tree);
102 static tree create_array_type_for_decl (tree, tree, tree);
103 static tree get_atexit_node (void);
104 static tree get_dso_handle_node (void);
105 static tree start_cleanup_fn (void);
106 static void end_cleanup_fn (void);
107 static tree cp_make_fname_decl (location_t, tree, int);
108 static void initialize_predefined_identifiers (void);
109 static tree check_special_function_return_type
110 (special_function_kind, tree, tree);
111 static tree push_cp_library_fn (enum tree_code, tree);
112 static tree build_cp_library_fn (tree, enum tree_code, tree);
113 static void store_parm_decls (tree);
114 static void initialize_local_var (tree, tree);
115 static void expand_static_init (tree, tree);
117 /* The following symbols are subsumed in the cp_global_trees array, and
118 listed here individually for documentation purposes.
121 tree wchar_decl_node;
123 tree vtable_entry_type;
124 tree delta_type_node;
125 tree __t_desc_type_node;
127 tree class_type_node;
128 tree unknown_type_node;
130 Array type `vtable_entry_type[]'
133 tree vtbl_ptr_type_node;
140 A FUNCTION_DECL which can call `abort'. Not necessarily the
141 one that the user will declare, but sufficient to be called
142 by routines that want to abort the program.
146 The FUNCTION_DECL for the default `::operator delete'.
148 tree global_delete_fndecl;
151 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
152 tree tinfo_var_id; */
154 tree cp_global_trees[CPTI_MAX];
156 /* Indicates that there is a type value in some namespace, although
157 that is not necessarily in scope at the moment. */
159 tree global_type_node;
161 /* The node that holds the "name" of the global scope. */
162 tree global_scope_name;
164 #define local_names cp_function_chain->x_local_names
166 /* A list of objects which have constructors or destructors
167 which reside in the global scope. The decl is stored in
168 the TREE_VALUE slot and the initializer is stored
169 in the TREE_PURPOSE slot. */
170 tree static_aggregates;
174 /* A node for the integer constant 2. */
176 tree integer_two_node;
178 /* Used only for jumps to as-yet undefined labels, since jumps to
179 defined labels can have their validity checked immediately. */
181 struct GTY((chain_next ("%h.next"))) named_label_use_entry {
182 struct named_label_use_entry *next;
183 /* The binding level to which this entry is *currently* attached.
184 This is initially the binding level in which the goto appeared,
185 but is modified as scopes are closed. */
186 struct cp_binding_level *binding_level;
187 /* The head of the names list that was current when the goto appeared,
188 or the inner scope popped. These are the decls that will *not* be
189 skipped when jumping to the label. */
191 /* The location of the goto, for error reporting. */
192 location_t o_goto_locus;
193 /* True if an OpenMP structured block scope has been closed since
194 the goto appeared. This means that the branch from the label will
195 illegally exit an OpenMP scope. */
199 /* A list of all LABEL_DECLs in the function that have names. Here so
200 we can clear out their names' definitions at the end of the
201 function, and so we can check the validity of jumps to these labels. */
203 struct GTY(()) named_label_entry {
204 /* The decl itself. */
207 /* The binding level to which the label is *currently* attached.
208 This is initially set to the binding level in which the label
209 is defined, but is modified as scopes are closed. */
210 struct cp_binding_level *binding_level;
211 /* The head of the names list that was current when the label was
212 defined, or the inner scope popped. These are the decls that will
213 be skipped when jumping to the label. */
215 /* A vector of all decls from all binding levels that would be
216 crossed by a backward branch to the label. */
217 VEC(tree,gc) *bad_decls;
219 /* A list of uses of the label, before the label is defined. */
220 struct named_label_use_entry *uses;
222 /* The following bits are set after the label is defined, and are
223 updated as scopes are popped. They indicate that a backward jump
224 to the label will illegally enter a scope of the given flavor. */
230 #define named_labels cp_function_chain->x_named_labels
232 /* The number of function bodies which we are currently processing.
233 (Zero if we are at namespace scope, one inside the body of a
234 function, two inside the body of a function in a local class, etc.) */
237 /* To avoid unwanted recursion, finish_function defers all mark_used calls
238 encountered during its execution until it finishes. */
239 bool defer_mark_used_calls;
240 VEC(tree, gc) *deferred_mark_used_calls;
242 /* States indicating how grokdeclarator() should handle declspecs marked
243 with __attribute__((deprecated)). An object declared as
244 __attribute__((deprecated)) suppresses warnings of uses of other
246 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
249 /* A list of VAR_DECLs whose type was incomplete at the time the
250 variable was declared. */
252 typedef struct GTY(()) incomplete_var_d {
254 tree incomplete_type;
257 DEF_VEC_O(incomplete_var);
258 DEF_VEC_ALLOC_O(incomplete_var,gc);
260 static GTY(()) VEC(incomplete_var,gc) *incomplete_vars;
262 /* Returns the kind of template specialization we are currently
263 processing, given that it's declaration contained N_CLASS_SCOPES
264 explicit scope qualifications. */
267 current_tmpl_spec_kind (int n_class_scopes)
269 int n_template_parm_scopes = 0;
270 int seen_specialization_p = 0;
271 int innermost_specialization_p = 0;
272 struct cp_binding_level *b;
274 /* Scan through the template parameter scopes. */
275 for (b = current_binding_level;
276 b->kind == sk_template_parms;
279 /* If we see a specialization scope inside a parameter scope,
280 then something is wrong. That corresponds to a declaration
283 template <class T> template <> ...
285 which is always invalid since [temp.expl.spec] forbids the
286 specialization of a class member template if the enclosing
287 class templates are not explicitly specialized as well. */
288 if (b->explicit_spec_p)
290 if (n_template_parm_scopes == 0)
291 innermost_specialization_p = 1;
293 seen_specialization_p = 1;
295 else if (seen_specialization_p == 1)
296 return tsk_invalid_member_spec;
298 ++n_template_parm_scopes;
301 /* Handle explicit instantiations. */
302 if (processing_explicit_instantiation)
304 if (n_template_parm_scopes != 0)
305 /* We've seen a template parameter list during an explicit
306 instantiation. For example:
308 template <class T> template void f(int);
310 This is erroneous. */
311 return tsk_invalid_expl_inst;
313 return tsk_expl_inst;
316 if (n_template_parm_scopes < n_class_scopes)
317 /* We've not seen enough template headers to match all the
318 specialized classes present. For example:
320 template <class T> void R<T>::S<T>::f(int);
322 This is invalid; there needs to be one set of template
323 parameters for each class. */
324 return tsk_insufficient_parms;
325 else if (n_template_parm_scopes == n_class_scopes)
326 /* We're processing a non-template declaration (even though it may
327 be a member of a template class.) For example:
329 template <class T> void S<T>::f(int);
331 The `class T' matches the `S<T>', leaving no template headers
332 corresponding to the `f'. */
334 else if (n_template_parm_scopes > n_class_scopes + 1)
335 /* We've got too many template headers. For example:
337 template <> template <class T> void f (T);
339 There need to be more enclosing classes. */
340 return tsk_excessive_parms;
342 /* This must be a template. It's of the form:
344 template <class T> template <class U> void S<T>::f(U);
346 This is a specialization if the innermost level was a
347 specialization; otherwise it's just a definition of the
349 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
352 /* Exit the current scope. */
360 /* When a label goes out of scope, check to see if that label was used
361 in a valid manner, and issue any appropriate warnings or errors. */
364 pop_label (tree label, tree old_value)
366 if (!processing_template_decl)
368 if (DECL_INITIAL (label) == NULL_TREE)
372 error ("label %q+D used but not defined", label);
373 location = input_location; /* FIXME want (input_filename, (line)0) */
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
378 warn_for_unused_label (label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels_1 (void **slot, void *data)
391 struct named_label_entry *ent = (struct named_label_entry *) *slot;
392 tree block = (tree) data;
394 pop_label (ent->label_decl, NULL_TREE);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 DECL_CHAIN (ent->label_decl) = BLOCK_VARS (block);
399 BLOCK_VARS (block) = ent->label_decl;
401 htab_clear_slot (named_labels, slot);
407 pop_labels (tree block)
411 htab_traverse (named_labels, pop_labels_1, block);
416 /* At the end of a block with local labels, restore the outer definition. */
419 pop_local_label (tree label, tree old_value)
421 struct named_label_entry dummy;
424 pop_label (label, old_value);
426 dummy.label_decl = label;
427 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
428 htab_clear_slot (named_labels, slot);
431 /* The following two routines are used to interface to Objective-C++.
432 The binding level is purposely treated as an opaque type. */
435 objc_get_current_scope (void)
437 return current_binding_level;
440 /* The following routine is used by the NeXT-style SJLJ exceptions;
441 variables get marked 'volatile' so as to not be clobbered by
442 _setjmp()/_longjmp() calls. All variables in the current scope,
443 as well as parent scopes up to (but not including) ENCLOSING_BLK
444 shall be thusly marked. */
447 objc_mark_locals_volatile (void *enclosing_blk)
449 struct cp_binding_level *scope;
451 for (scope = current_binding_level;
452 scope && scope != enclosing_blk;
453 scope = scope->level_chain)
457 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
458 objc_volatilize_decl (decl);
460 /* Do not climb up past the current function. */
461 if (scope->kind == sk_function_parms)
466 /* Update data for defined and undefined labels when leaving a scope. */
469 poplevel_named_label_1 (void **slot, void *data)
471 struct named_label_entry *ent = (struct named_label_entry *) *slot;
472 struct cp_binding_level *bl = (struct cp_binding_level *) data;
473 struct cp_binding_level *obl = bl->level_chain;
475 if (ent->binding_level == bl)
479 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
480 TREE_LISTs representing OVERLOADs, so be careful. */
481 for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
483 : TREE_CHAIN (decl)))
484 if (decl_jump_unsafe (decl))
485 VEC_safe_push (tree, gc, ent->bad_decls, decl);
487 ent->binding_level = obl;
488 ent->names_in_scope = obl->names;
492 ent->in_try_scope = true;
495 ent->in_catch_scope = true;
498 ent->in_omp_scope = true;
506 struct named_label_use_entry *use;
508 for (use = ent->uses; use ; use = use->next)
509 if (use->binding_level == bl)
511 use->binding_level = obl;
512 use->names_in_scope = obl->names;
513 if (bl->kind == sk_omp)
514 use->in_omp_scope = true;
521 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
522 when errors were reported, except for -Werror-unused-but-set-*. */
523 static int unused_but_set_errorcount;
525 /* Exit a binding level.
526 Pop the level off, and restore the state of the identifier-decl mappings
527 that were in effect when this level was entered.
529 If KEEP == 1, this level had explicit declarations, so
530 and create a "block" (a BLOCK node) for the level
531 to record its declarations and subblocks for symbol table output.
533 If FUNCTIONBODY is nonzero, this level is the body of a function,
534 so create a block as if KEEP were set and also clear out all
537 If REVERSE is nonzero, reverse the order of decls before putting
538 them into the BLOCK. */
541 poplevel (int keep, int reverse, int functionbody)
544 /* The chain of decls was accumulated in reverse order.
545 Put it into forward order, just for cleanliness. */
550 int leaving_for_scope;
553 cp_label_binding *label_bind;
555 timevar_push (TV_NAME_LOOKUP);
560 gcc_assert (current_binding_level->kind != sk_class);
562 if (current_binding_level->kind == sk_cleanup)
564 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
566 gcc_assert (!VEC_length(cp_class_binding,
567 current_binding_level->class_shadowed));
569 /* We used to use KEEP == 2 to indicate that the new block should go
570 at the beginning of the list of blocks at this binding level,
571 rather than the end. This hack is no longer used. */
572 gcc_assert (keep == 0 || keep == 1);
574 if (current_binding_level->keep)
577 /* Any uses of undefined labels, and any defined labels, now operate
578 under constraints of next binding contour. */
579 if (cfun && !functionbody && named_labels)
580 htab_traverse (named_labels, poplevel_named_label_1,
581 current_binding_level);
583 /* Get the decls in the order they were written.
584 Usually current_binding_level->names is in reverse order.
585 But parameter decls were previously put in forward order. */
588 current_binding_level->names
589 = decls = nreverse (current_binding_level->names);
591 decls = current_binding_level->names;
593 /* If there were any declarations or structure tags in that level,
594 or if this level is a function body,
595 create a BLOCK to record them for the life of this function. */
597 if (keep == 1 || functionbody)
598 block = make_node (BLOCK);
599 if (block != NULL_TREE)
601 BLOCK_VARS (block) = decls;
602 BLOCK_SUBBLOCKS (block) = subblocks;
605 /* In each subblock, record that this is its superior. */
607 for (link = subblocks; link; link = BLOCK_CHAIN (link))
608 BLOCK_SUPERCONTEXT (link) = block;
610 /* We still support the old for-scope rules, whereby the variables
611 in a for-init statement were in scope after the for-statement
612 ended. We only use the new rules if flag_new_for_scope is
615 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
617 /* Before we remove the declarations first check for unused variables. */
618 if ((warn_unused_variable || warn_unused_but_set_variable)
619 && !processing_template_decl)
620 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
621 if (TREE_CODE (decl) == VAR_DECL
622 && (! TREE_USED (decl) || !DECL_READ_P (decl))
623 && ! DECL_IN_SYSTEM_HEADER (decl)
624 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
626 if (! TREE_USED (decl))
627 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
628 else if (DECL_CONTEXT (decl) == current_function_decl
629 && TREE_TYPE (decl) != error_mark_node
630 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
631 && errorcount == unused_but_set_errorcount
632 && (!CLASS_TYPE_P (TREE_TYPE (decl))
633 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
635 warning (OPT_Wunused_but_set_variable,
636 "variable %q+D set but not used", decl);
637 unused_but_set_errorcount = errorcount;
641 /* Remove declarations for all the DECLs in this level. */
642 for (link = decls; link; link = TREE_CHAIN (link))
644 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
647 tree name = DECL_NAME (link);
651 ob = outer_binding (name,
652 IDENTIFIER_BINDING (name),
655 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
657 ns_binding = NULL_TREE;
659 if (ob && ob->scope == current_binding_level->level_chain)
660 /* We have something like:
665 and we are leaving the `for' scope. There's no reason to
666 keep the binding of the inner `i' in this case. */
667 pop_binding (name, link);
668 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
669 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
670 /* Here, we have something like:
678 We must pop the for-scope binding so we know what's a
679 type and what isn't. */
680 pop_binding (name, link);
683 /* Mark this VAR_DECL as dead so that we can tell we left it
684 there only for backward compatibility. */
685 DECL_DEAD_FOR_LOCAL (link) = 1;
687 /* Keep track of what should have happened when we
688 popped the binding. */
691 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
692 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
695 /* Add it to the list of dead variables in the next
696 outermost binding to that we can remove these when we
697 leave that binding. */
698 VEC_safe_push (tree, gc,
699 current_binding_level->level_chain->dead_vars_from_for,
702 /* Although we don't pop the cxx_binding, we do clear
703 its SCOPE since the scope is going away now. */
704 IDENTIFIER_BINDING (name)->scope
705 = current_binding_level->level_chain;
712 /* Remove the binding. */
715 if (TREE_CODE (decl) == TREE_LIST)
716 decl = TREE_VALUE (decl);
719 if (TREE_CODE (name) == OVERLOAD)
720 name = OVL_FUNCTION (name);
722 gcc_assert (DECL_P (name));
723 pop_binding (DECL_NAME (name), decl);
727 /* Remove declarations for any `for' variables from inner scopes
728 that we kept around. */
729 FOR_EACH_VEC_ELT_REVERSE (tree, current_binding_level->dead_vars_from_for,
731 pop_binding (DECL_NAME (decl), decl);
733 /* Restore the IDENTIFIER_TYPE_VALUEs. */
734 for (link = current_binding_level->type_shadowed;
735 link; link = TREE_CHAIN (link))
736 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
738 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
739 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding,
740 current_binding_level->shadowed_labels,
742 pop_local_label (label_bind->label, label_bind->prev_value);
744 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
745 list if a `using' declaration put them there. The debugging
746 back ends won't understand OVERLOAD, so we remove them here.
747 Because the BLOCK_VARS are (temporarily) shared with
748 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
749 popped all the bindings. */
754 for (d = &BLOCK_VARS (block); *d; )
756 if (TREE_CODE (*d) == TREE_LIST)
757 *d = TREE_CHAIN (*d);
759 d = &DECL_CHAIN (*d);
763 /* If the level being exited is the top level of a function,
764 check over all the labels. */
767 /* Since this is the top level block of a function, the vars are
768 the function's parameters. Don't leave them in the BLOCK
769 because they are found in the FUNCTION_DECL instead. */
770 BLOCK_VARS (block) = 0;
774 kind = current_binding_level->kind;
775 if (kind == sk_cleanup)
779 /* If this is a temporary binding created for a cleanup, then we'll
780 have pushed a statement list level. Pop that, create a new
781 BIND_EXPR for the block, and insert it into the stream. */
782 stmt = pop_stmt_list (current_binding_level->statement_list);
783 stmt = c_build_bind_expr (input_location, block, stmt);
790 /* The current function is being defined, so its DECL_INITIAL
791 should be error_mark_node. */
792 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
793 DECL_INITIAL (current_function_decl) = block;
796 current_binding_level->blocks
797 = block_chainon (current_binding_level->blocks, block);
799 /* If we did not make a block for the level just exited,
800 any blocks made for inner levels
801 (since they cannot be recorded as subblocks in that level)
802 must be carried forward so they will later become subblocks
803 of something else. */
805 current_binding_level->blocks
806 = block_chainon (current_binding_level->blocks, subblocks);
808 /* Each and every BLOCK node created here in `poplevel' is important
809 (e.g. for proper debugging information) so if we created one
810 earlier, mark it as "used". */
812 TREE_USED (block) = 1;
814 /* All temporary bindings created for cleanups are popped silently. */
815 if (kind == sk_cleanup)
818 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
821 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
822 itself, calling F for each. The DATA is passed to F as well. */
825 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
828 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
830 result |= (*f) (name_space, data);
832 for (; current; current = DECL_CHAIN (current))
833 result |= walk_namespaces_r (current, f, data);
838 /* Walk all the namespaces, calling F for each. The DATA is passed to
842 walk_namespaces (walk_namespaces_fn f, void* data)
844 return walk_namespaces_r (global_namespace, f, data);
847 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
848 DATA is non-NULL, this is the last time we will call
849 wrapup_global_declarations for this NAMESPACE. */
852 wrapup_globals_for_namespace (tree name_space, void* data)
854 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
855 VEC(tree,gc) *statics = level->static_decls;
856 tree *vec = VEC_address (tree, statics);
857 int len = VEC_length (tree, statics);
858 int last_time = (data != 0);
862 check_global_declarations (vec, len);
863 emit_debug_global_declarations (vec, len);
867 /* Write out any globals that need to be output. */
868 return wrapup_global_declarations (vec, len);
872 /* In C++, you don't have to write `struct S' to refer to `S'; you
873 can just use `S'. We accomplish this by creating a TYPE_DECL as
874 if the user had written `typedef struct S S'. Create and return
875 the TYPE_DECL for TYPE. */
878 create_implicit_typedef (tree name, tree type)
882 decl = build_decl (input_location, TYPE_DECL, name, type);
883 DECL_ARTIFICIAL (decl) = 1;
884 /* There are other implicit type declarations, like the one *within*
885 a class that allows you to write `S::S'. We must distinguish
887 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
888 TYPE_NAME (type) = decl;
889 TYPE_STUB_DECL (type) = decl;
894 /* Remember a local name for name-mangling purposes. */
897 push_local_name (tree decl)
902 timevar_push (TV_NAME_LOOKUP);
904 name = DECL_NAME (decl);
906 nelts = VEC_length (tree, local_names);
907 for (i = 0; i < nelts; i++)
909 t = VEC_index (tree, local_names, i);
910 if (DECL_NAME (t) == name)
912 if (!DECL_LANG_SPECIFIC (decl))
913 retrofit_lang_decl (decl);
914 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
915 if (DECL_LANG_SPECIFIC (t))
916 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
918 DECL_DISCRIMINATOR (decl) = 1;
920 VEC_replace (tree, local_names, i, decl);
921 timevar_pop (TV_NAME_LOOKUP);
926 VEC_safe_push (tree, gc, local_names, decl);
927 timevar_pop (TV_NAME_LOOKUP);
930 /* Subroutine of duplicate_decls: return truthvalue of whether
931 or not types of these decls match.
933 For C++, we must compare the parameter list so that `int' can match
934 `int&' in a parameter position, but `int&' is not confused with
938 decls_match (tree newdecl, tree olddecl)
942 if (newdecl == olddecl)
945 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
946 /* If the two DECLs are not even the same kind of thing, we're not
947 interested in their types. */
950 if (TREE_CODE (newdecl) == FUNCTION_DECL)
952 tree f1 = TREE_TYPE (newdecl);
953 tree f2 = TREE_TYPE (olddecl);
954 tree p1 = TYPE_ARG_TYPES (f1);
955 tree p2 = TYPE_ARG_TYPES (f2);
957 /* Specializations of different templates are different functions
958 even if they have the same type. */
959 tree t1 = (DECL_USE_TEMPLATE (newdecl)
960 ? DECL_TI_TEMPLATE (newdecl)
962 tree t2 = (DECL_USE_TEMPLATE (olddecl)
963 ? DECL_TI_TEMPLATE (olddecl)
968 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
969 && ! (DECL_EXTERN_C_P (newdecl)
970 && DECL_EXTERN_C_P (olddecl)))
973 #ifdef NO_IMPLICIT_EXTERN_C
974 /* A new declaration doesn't match a built-in one unless it
975 is also extern "C". */
976 if (DECL_IS_BUILTIN (olddecl)
977 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
981 if (TREE_CODE (f1) != TREE_CODE (f2))
984 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
986 if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
987 && (DECL_BUILT_IN (olddecl)
988 #ifndef NO_IMPLICIT_EXTERN_C
989 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
990 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
994 types_match = self_promoting_args_p (p1);
995 if (p1 == void_list_node)
996 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
998 #ifndef NO_IMPLICIT_EXTERN_C
999 else if (!prototype_p (f1)
1000 && (DECL_EXTERN_C_P (olddecl)
1001 && DECL_IN_SYSTEM_HEADER (olddecl)
1002 && !DECL_CLASS_SCOPE_P (olddecl))
1003 && (DECL_EXTERN_C_P (newdecl)
1004 && DECL_IN_SYSTEM_HEADER (newdecl)
1005 && !DECL_CLASS_SCOPE_P (newdecl)))
1007 types_match = self_promoting_args_p (p2);
1008 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1014 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1015 || comp_type_attributes (TREE_TYPE (newdecl),
1016 TREE_TYPE (olddecl)) != 0);
1021 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1023 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1024 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1027 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1028 DECL_TEMPLATE_PARMS (olddecl)))
1031 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1032 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1033 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1035 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1036 DECL_TEMPLATE_RESULT (newdecl));
1040 /* Need to check scope for variable declaration (VAR_DECL).
1041 For typedef (TYPE_DECL), scope is ignored. */
1042 if (TREE_CODE (newdecl) == VAR_DECL
1043 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1045 Two declarations for an object with C language linkage
1046 with the same name (ignoring the namespace that qualify
1047 it) that appear in different namespace scopes refer to
1049 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1052 if (TREE_TYPE (newdecl) == error_mark_node)
1053 types_match = TREE_TYPE (olddecl) == error_mark_node;
1054 else if (TREE_TYPE (olddecl) == NULL_TREE)
1055 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1056 else if (TREE_TYPE (newdecl) == NULL_TREE)
1059 types_match = comptypes (TREE_TYPE (newdecl),
1060 TREE_TYPE (olddecl),
1061 COMPARE_REDECLARATION);
1067 /* If NEWDECL is `static' and an `extern' was seen previously,
1068 warn about it. OLDDECL is the previous declaration.
1070 Note that this does not apply to the C++ case of declaring
1071 a variable `extern const' and then later `const'.
1073 Don't complain about built-in functions, since they are beyond
1074 the user's control. */
1077 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1079 if (TREE_CODE (newdecl) == TYPE_DECL
1080 || TREE_CODE (newdecl) == TEMPLATE_DECL
1081 || TREE_CODE (newdecl) == CONST_DECL
1082 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1085 /* Don't get confused by static member functions; that's a different
1087 if (TREE_CODE (newdecl) == FUNCTION_DECL
1088 && DECL_STATIC_FUNCTION_P (newdecl))
1091 /* If the old declaration was `static', or the new one isn't, then
1092 everything is OK. */
1093 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1096 /* It's OK to declare a builtin function as `static'. */
1097 if (TREE_CODE (olddecl) == FUNCTION_DECL
1098 && DECL_ARTIFICIAL (olddecl))
1101 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1102 permerror (input_location, "previous declaration of %q+D", olddecl);
1105 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1106 function templates. If their exception specifications do not
1107 match, issue a diagnostic. */
1110 check_redeclaration_exception_specification (tree new_decl,
1115 tree new_exceptions;
1116 tree old_exceptions;
1118 new_type = TREE_TYPE (new_decl);
1119 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1120 old_type = TREE_TYPE (old_decl);
1121 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1125 If any declaration of a function has an exception-specification,
1126 all declarations, including the definition and an explicit
1127 specialization, of that function shall have an
1128 exception-specification with the same set of type-ids. */
1129 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1130 && ! DECL_IS_BUILTIN (old_decl)
1132 && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1134 error ("declaration of %qF has a different exception specifier",
1136 error ("from previous declaration %q+F", old_decl);
1140 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1141 Otherwise issue diagnostics. */
1144 validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1146 old_decl = STRIP_TEMPLATE (old_decl);
1147 new_decl = STRIP_TEMPLATE (new_decl);
1148 if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1149 || !VAR_OR_FUNCTION_DECL_P (new_decl))
1151 if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1152 == DECL_DECLARED_CONSTEXPR_P (new_decl))
1154 if (TREE_CODE (old_decl) == FUNCTION_DECL && DECL_BUILT_IN (old_decl))
1156 /* Hide a built-in declaration. */
1157 DECL_DECLARED_CONSTEXPR_P (old_decl)
1158 = DECL_DECLARED_CONSTEXPR_P (new_decl);
1161 error ("redeclaration %qD differs in %<constexpr%>", new_decl);
1162 error ("from previous declaration %q+D", old_decl);
1166 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1167 && lookup_attribute ("gnu_inline", \
1168 DECL_ATTRIBUTES (fn)))
1170 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1171 If the redeclaration is invalid, a diagnostic is issued, and the
1172 error_mark_node is returned. Otherwise, OLDDECL is returned.
1174 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1177 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1180 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1182 unsigned olddecl_uid = DECL_UID (olddecl);
1183 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1184 int new_defines_function = 0;
1185 tree new_template_info;
1187 if (newdecl == olddecl)
1190 types_match = decls_match (newdecl, olddecl);
1192 /* If either the type of the new decl or the type of the old decl is an
1193 error_mark_node, then that implies that we have already issued an
1194 error (earlier) for some bogus type specification, and in that case,
1195 it is rather pointless to harass the user with yet more error message
1196 about the same declaration, so just pretend the types match here. */
1197 if (TREE_TYPE (newdecl) == error_mark_node
1198 || TREE_TYPE (olddecl) == error_mark_node)
1199 return error_mark_node;
1201 if (DECL_P (olddecl)
1202 && TREE_CODE (newdecl) == FUNCTION_DECL
1203 && TREE_CODE (olddecl) == FUNCTION_DECL
1204 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1206 if (DECL_DECLARED_INLINE_P (newdecl)
1207 && DECL_UNINLINABLE (newdecl)
1208 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1209 /* Already warned elsewhere. */;
1210 else if (DECL_DECLARED_INLINE_P (olddecl)
1211 && DECL_UNINLINABLE (olddecl)
1212 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1213 /* Already warned. */;
1214 else if (DECL_DECLARED_INLINE_P (newdecl)
1215 && DECL_UNINLINABLE (olddecl)
1216 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1218 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1220 warning (OPT_Wattributes, "previous declaration of %q+D "
1221 "with attribute noinline", olddecl);
1223 else if (DECL_DECLARED_INLINE_P (olddecl)
1224 && DECL_UNINLINABLE (newdecl)
1225 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1227 warning (OPT_Wattributes, "function %q+D redeclared with "
1228 "attribute noinline", newdecl);
1229 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1234 /* Check for redeclaration and other discrepancies. */
1235 if (TREE_CODE (olddecl) == FUNCTION_DECL
1236 && DECL_ARTIFICIAL (olddecl))
1238 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1239 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1241 /* Avoid warnings redeclaring built-ins which have not been
1242 explicitly declared. */
1243 if (DECL_ANTICIPATED (olddecl))
1246 /* If you declare a built-in or predefined function name as static,
1247 the old definition is overridden, but optionally warn this was a
1248 bad choice of name. */
1249 if (! TREE_PUBLIC (newdecl))
1251 warning (OPT_Wshadow,
1252 DECL_BUILT_IN (olddecl)
1253 ? G_("shadowing built-in function %q#D")
1254 : G_("shadowing library function %q#D"), olddecl);
1255 /* Discard the old built-in function. */
1258 /* If the built-in is not ansi, then programs can override
1259 it even globally without an error. */
1260 else if (! DECL_BUILT_IN (olddecl))
1261 warning (0, "library function %q#D redeclared as non-function %q#D",
1265 error ("declaration of %q#D", newdecl);
1266 error ("conflicts with built-in declaration %q#D",
1271 else if (!types_match)
1273 /* Avoid warnings redeclaring built-ins which have not been
1274 explicitly declared. */
1275 if (DECL_ANTICIPATED (olddecl))
1277 /* Deal with fileptr_type_node. FILE type is not known
1278 at the time we create the builtins. */
1281 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1282 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1284 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1287 else if (TREE_VALUE (t2) == fileptr_type_node)
1289 tree t = TREE_VALUE (t1);
1291 if (TREE_CODE (t) == POINTER_TYPE
1292 && TYPE_NAME (TREE_TYPE (t))
1293 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1294 == get_identifier ("FILE")
1295 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1297 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1299 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1300 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1301 types_match = decls_match (newdecl, olddecl);
1303 return duplicate_decls (newdecl, olddecl,
1305 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1308 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1311 else if ((DECL_EXTERN_C_P (newdecl)
1312 && DECL_EXTERN_C_P (olddecl))
1313 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1314 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1316 /* A near match; override the builtin. */
1318 if (TREE_PUBLIC (newdecl))
1320 warning (0, "new declaration %q#D", newdecl);
1321 warning (0, "ambiguates built-in declaration %q#D",
1325 warning (OPT_Wshadow,
1326 DECL_BUILT_IN (olddecl)
1327 ? G_("shadowing built-in function %q#D")
1328 : G_("shadowing library function %q#D"), olddecl);
1331 /* Discard the old built-in function. */
1334 /* Replace the old RTL to avoid problems with inlining. */
1335 COPY_DECL_RTL (newdecl, olddecl);
1337 /* Even if the types match, prefer the new declarations type for
1338 built-ins which have not been explicitly declared, for
1339 exception lists, etc... */
1340 else if (DECL_IS_BUILTIN (olddecl))
1342 tree type = TREE_TYPE (newdecl);
1343 tree attribs = (*targetm.merge_type_attributes)
1344 (TREE_TYPE (olddecl), type);
1346 type = cp_build_type_attribute_variant (type, attribs);
1347 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1350 /* If a function is explicitly declared "throw ()", propagate that to
1351 the corresponding builtin. */
1352 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1353 && DECL_ANTICIPATED (olddecl)
1354 && TREE_NOTHROW (newdecl)
1355 && !TREE_NOTHROW (olddecl)
1356 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1357 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1359 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1361 /* Whether or not the builtin can throw exceptions has no
1362 bearing on this declarator. */
1363 TREE_NOTHROW (olddecl) = 0;
1365 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1367 /* If a builtin function is redeclared as `static', merge
1368 the declarations, but make the original one static. */
1369 DECL_THIS_STATIC (olddecl) = 1;
1370 TREE_PUBLIC (olddecl) = 0;
1372 /* Make the old declaration consistent with the new one so
1373 that all remnants of the builtin-ness of this function
1374 will be banished. */
1375 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1376 COPY_DECL_RTL (newdecl, olddecl);
1379 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1381 /* C++ Standard, 3.3, clause 4:
1382 "[Note: a namespace name or a class template name must be unique
1383 in its declarative region (7.3.2, clause 14). ]" */
1384 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1385 && TREE_CODE (newdecl) != NAMESPACE_DECL
1386 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1387 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1388 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1389 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1391 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1392 && TREE_CODE (newdecl) != TYPE_DECL)
1393 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1394 && TREE_CODE (olddecl) != TYPE_DECL))
1396 /* We do nothing special here, because C++ does such nasty
1397 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1398 get shadowed, and know that if we need to find a TYPE_DECL
1399 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1400 slot of the identifier. */
1404 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1405 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1406 || (TREE_CODE (olddecl) == FUNCTION_DECL
1407 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1411 error ("%q#D redeclared as different kind of symbol", newdecl);
1412 if (TREE_CODE (olddecl) == TREE_LIST)
1413 olddecl = TREE_VALUE (olddecl);
1414 error ("previous declaration of %q+#D", olddecl);
1416 return error_mark_node;
1418 else if (!types_match)
1420 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1421 /* These are certainly not duplicate declarations; they're
1422 from different scopes. */
1425 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1427 /* The name of a class template may not be declared to refer to
1428 any other template, class, function, object, namespace, value,
1429 or type in the same scope. */
1430 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1431 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1433 error ("declaration of template %q#D", newdecl);
1434 error ("conflicts with previous declaration %q+#D", olddecl);
1436 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1437 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1438 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1439 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1440 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1441 DECL_TEMPLATE_PARMS (olddecl))
1442 /* Template functions can be disambiguated by
1444 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1445 TREE_TYPE (TREE_TYPE (olddecl))))
1447 error ("new declaration %q#D", newdecl);
1448 error ("ambiguates old declaration %q+#D", olddecl);
1452 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1454 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1456 error ("declaration of C function %q#D conflicts with",
1458 error ("previous declaration %q+#D here", olddecl);
1461 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1462 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1464 error ("new declaration %q#D", newdecl);
1465 error ("ambiguates old declaration %q+#D", olddecl);
1466 return error_mark_node;
1473 error ("conflicting declaration %q#D", newdecl);
1474 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1475 return error_mark_node;
1478 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1479 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1480 && (!DECL_TEMPLATE_INFO (newdecl)
1481 || (DECL_TI_TEMPLATE (newdecl)
1482 != DECL_TI_TEMPLATE (olddecl))))
1483 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1484 && (!DECL_TEMPLATE_INFO (olddecl)
1485 || (DECL_TI_TEMPLATE (olddecl)
1486 != DECL_TI_TEMPLATE (newdecl))))))
1487 /* It's OK to have a template specialization and a non-template
1488 with the same type, or to have specializations of two
1489 different templates with the same type. Note that if one is a
1490 specialization, and the other is an instantiation of the same
1491 template, that we do not exit at this point. That situation
1492 can occur if we instantiate a template class, and then
1493 specialize one of its methods. This situation is valid, but
1494 the declarations must be merged in the usual way. */
1496 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1497 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1498 && !DECL_USE_TEMPLATE (newdecl))
1499 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1500 && !DECL_USE_TEMPLATE (olddecl))))
1501 /* One of the declarations is a template instantiation, and the
1502 other is not a template at all. That's OK. */
1504 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1506 /* In [namespace.alias] we have:
1508 In a declarative region, a namespace-alias-definition can be
1509 used to redefine a namespace-alias declared in that declarative
1510 region to refer only to the namespace to which it already
1513 Therefore, if we encounter a second alias directive for the same
1514 alias, we can just ignore the second directive. */
1515 if (DECL_NAMESPACE_ALIAS (newdecl)
1516 && (DECL_NAMESPACE_ALIAS (newdecl)
1517 == DECL_NAMESPACE_ALIAS (olddecl)))
1519 /* [namespace.alias]
1521 A namespace-name or namespace-alias shall not be declared as
1522 the name of any other entity in the same declarative region.
1523 A namespace-name defined at global scope shall not be
1524 declared as the name of any other entity in any global scope
1526 error ("declaration of namespace %qD conflicts with", newdecl);
1527 error ("previous declaration of namespace %q+D here", olddecl);
1528 return error_mark_node;
1532 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1535 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1536 if (DECL_NAME (olddecl) != NULL_TREE)
1537 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1538 ? "%q+#D previously defined here"
1539 : "%q+#D previously declared here", olddecl);
1540 return error_mark_node;
1542 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1543 && DECL_INITIAL (olddecl) != NULL_TREE
1544 && !prototype_p (TREE_TYPE (olddecl))
1545 && prototype_p (TREE_TYPE (newdecl)))
1547 /* Prototype decl follows defn w/o prototype. */
1548 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1549 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1550 "follows non-prototype definition here");
1552 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1553 || TREE_CODE (olddecl) == VAR_DECL)
1554 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1557 If two declarations of the same function or object
1558 specify different linkage-specifications ..., the program
1559 is ill-formed.... Except for functions with C++ linkage,
1560 a function declaration without a linkage specification
1561 shall not precede the first linkage specification for
1562 that function. A function can be declared without a
1563 linkage specification after an explicit linkage
1564 specification has been seen; the linkage explicitly
1565 specified in the earlier declaration is not affected by
1566 such a function declaration.
1568 DR 563 raises the question why the restrictions on
1569 functions should not also apply to objects. Older
1570 versions of G++ silently ignore the linkage-specification
1578 which is clearly wrong. Therefore, we now treat objects
1580 if (current_lang_depth () == 0)
1582 /* There is no explicit linkage-specification, so we use
1583 the linkage from the previous declaration. */
1584 if (!DECL_LANG_SPECIFIC (newdecl))
1585 retrofit_lang_decl (newdecl);
1586 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1590 error ("previous declaration of %q+#D with %qL linkage",
1591 olddecl, DECL_LANGUAGE (olddecl));
1592 error ("conflicts with new declaration with %qL linkage",
1593 DECL_LANGUAGE (newdecl));
1597 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1599 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1601 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1602 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1605 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1606 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1608 for (; t1 && t1 != void_list_node;
1609 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1610 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1612 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1615 permerror (input_location, "default argument given for parameter %d of %q#D",
1617 permerror (input_location, "after previous specification in %q+#D", olddecl);
1621 error ("default argument given for parameter %d of %q#D",
1623 error ("after previous specification in %q+#D",
1630 /* Do not merge an implicit typedef with an explicit one. In:
1634 typedef class A A __attribute__ ((foo));
1636 the attribute should apply only to the typedef. */
1637 if (TREE_CODE (olddecl) == TYPE_DECL
1638 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1639 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1642 /* If new decl is `static' and an `extern' was seen previously,
1644 warn_extern_redeclared_static (newdecl, olddecl);
1646 if (!validate_constexpr_redeclaration (olddecl, newdecl))
1647 return error_mark_node;
1649 /* We have committed to returning 1 at this point. */
1650 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1652 /* Now that functions must hold information normally held
1653 by field decls, there is extra work to do so that
1654 declaration information does not get destroyed during
1656 if (DECL_VINDEX (olddecl))
1657 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1658 if (DECL_CONTEXT (olddecl))
1659 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1660 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1661 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1662 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1663 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1664 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1665 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1666 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1667 SET_OVERLOADED_OPERATOR_CODE
1668 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1669 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1671 /* Optionally warn about more than one declaration for the same
1672 name, but don't warn about a function declaration followed by a
1674 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1675 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1676 /* Don't warn about extern decl followed by definition. */
1677 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1678 /* Don't warn about friends, let add_friend take care of it. */
1679 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1681 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1682 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1685 if (DECL_DELETED_FN (newdecl))
1687 error ("deleted definition of %qD", newdecl);
1688 error ("after previous declaration %q+D", olddecl);
1692 /* Deal with C++: must preserve virtual function table size. */
1693 if (TREE_CODE (olddecl) == TYPE_DECL)
1695 tree newtype = TREE_TYPE (newdecl);
1696 tree oldtype = TREE_TYPE (olddecl);
1698 if (newtype != error_mark_node && oldtype != error_mark_node
1699 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1700 CLASSTYPE_FRIEND_CLASSES (newtype)
1701 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1703 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1706 /* Copy all the DECL_... slots specified in the new decl
1707 except for any that we copy here from the old type. */
1708 DECL_ATTRIBUTES (newdecl)
1709 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1711 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1715 old_result = DECL_TEMPLATE_RESULT (olddecl);
1716 new_result = DECL_TEMPLATE_RESULT (newdecl);
1717 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1718 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1719 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1720 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1722 DECL_ATTRIBUTES (old_result)
1723 = (*targetm.merge_decl_attributes) (old_result, new_result);
1725 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1727 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1728 && DECL_INITIAL (new_result))
1730 if (DECL_INITIAL (old_result))
1731 DECL_UNINLINABLE (old_result) = 1;
1733 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1734 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1735 DECL_NOT_REALLY_EXTERN (old_result)
1736 = DECL_NOT_REALLY_EXTERN (new_result);
1737 DECL_INTERFACE_KNOWN (old_result)
1738 = DECL_INTERFACE_KNOWN (new_result);
1739 DECL_DECLARED_INLINE_P (old_result)
1740 = DECL_DECLARED_INLINE_P (new_result);
1741 DECL_DISREGARD_INLINE_LIMITS (old_result)
1742 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1747 DECL_DECLARED_INLINE_P (old_result)
1748 |= DECL_DECLARED_INLINE_P (new_result);
1749 DECL_DISREGARD_INLINE_LIMITS (old_result)
1750 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1751 check_redeclaration_exception_specification (newdecl, olddecl);
1755 /* If the new declaration is a definition, update the file and
1756 line information on the declaration, and also make
1757 the old declaration the same definition. */
1758 if (DECL_INITIAL (new_result) != NULL_TREE)
1760 DECL_SOURCE_LOCATION (olddecl)
1761 = DECL_SOURCE_LOCATION (old_result)
1762 = DECL_SOURCE_LOCATION (newdecl);
1763 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1764 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1767 DECL_ARGUMENTS (old_result)
1768 = DECL_ARGUMENTS (new_result);
1769 for (parm = DECL_ARGUMENTS (old_result); parm;
1770 parm = DECL_CHAIN (parm))
1771 DECL_CONTEXT (parm) = old_result;
1780 /* Automatically handles default parameters. */
1781 tree oldtype = TREE_TYPE (olddecl);
1784 /* Merge the data types specified in the two decls. */
1785 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1787 /* If merge_types produces a non-typedef type, just use the old type. */
1788 if (TREE_CODE (newdecl) == TYPE_DECL
1789 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1792 if (TREE_CODE (newdecl) == VAR_DECL)
1794 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1795 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1796 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1797 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1798 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1799 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1801 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1802 if (DECL_LANG_SPECIFIC (olddecl)
1803 && CP_DECL_THREADPRIVATE_P (olddecl))
1805 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1806 if (!DECL_LANG_SPECIFIC (newdecl))
1807 retrofit_lang_decl (newdecl);
1809 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1810 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1814 /* Do this after calling `merge_types' so that default
1815 parameters don't confuse us. */
1816 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1817 check_redeclaration_exception_specification (newdecl, olddecl);
1818 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1820 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1821 check_default_args (newdecl);
1823 /* Lay the type out, unless already done. */
1824 if (! same_type_p (newtype, oldtype)
1825 && TREE_TYPE (newdecl) != error_mark_node
1826 && !(processing_template_decl && uses_template_parms (newdecl)))
1827 layout_type (TREE_TYPE (newdecl));
1829 if ((TREE_CODE (newdecl) == VAR_DECL
1830 || TREE_CODE (newdecl) == PARM_DECL
1831 || TREE_CODE (newdecl) == RESULT_DECL
1832 || TREE_CODE (newdecl) == FIELD_DECL
1833 || TREE_CODE (newdecl) == TYPE_DECL)
1834 && !(processing_template_decl && uses_template_parms (newdecl)))
1835 layout_decl (newdecl, 0);
1837 /* Merge the type qualifiers. */
1838 if (TREE_READONLY (newdecl))
1839 TREE_READONLY (olddecl) = 1;
1840 if (TREE_THIS_VOLATILE (newdecl))
1841 TREE_THIS_VOLATILE (olddecl) = 1;
1842 if (TREE_NOTHROW (newdecl))
1843 TREE_NOTHROW (olddecl) = 1;
1845 /* Merge deprecatedness. */
1846 if (TREE_DEPRECATED (newdecl))
1847 TREE_DEPRECATED (olddecl) = 1;
1849 /* Preserve function specific target and optimization options */
1850 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1852 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1853 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1854 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1855 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1857 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1858 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1859 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1860 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1863 /* Merge the initialization information. */
1864 if (DECL_INITIAL (newdecl) == NULL_TREE
1865 && DECL_INITIAL (olddecl) != NULL_TREE)
1867 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1868 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1869 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1871 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1872 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1876 /* Merge the section attribute.
1877 We want to issue an error if the sections conflict but that must be
1878 done later in decl_attributes since we are called before attributes
1880 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1881 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1883 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1885 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1886 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1887 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1888 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1889 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1890 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1891 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1892 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1893 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1894 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1895 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1896 /* Keep the old RTL. */
1897 COPY_DECL_RTL (olddecl, newdecl);
1899 else if (TREE_CODE (newdecl) == VAR_DECL
1900 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1902 /* Keep the old RTL. We cannot keep the old RTL if the old
1903 declaration was for an incomplete object and the new
1904 declaration is not since many attributes of the RTL will
1906 COPY_DECL_RTL (olddecl, newdecl);
1909 /* If cannot merge, then use the new type and qualifiers,
1910 and don't preserve the old rtl. */
1913 /* Clean out any memory we had of the old declaration. */
1914 tree oldstatic = value_member (olddecl, static_aggregates);
1916 TREE_VALUE (oldstatic) = error_mark_node;
1918 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1919 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1920 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1921 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1924 /* Merge the storage class information. */
1925 merge_weak (newdecl, olddecl);
1927 if (DECL_ONE_ONLY (olddecl))
1928 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1930 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1931 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1932 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1933 if (! DECL_EXTERNAL (olddecl))
1934 DECL_EXTERNAL (newdecl) = 0;
1936 new_template_info = NULL_TREE;
1937 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1939 bool new_redefines_gnu_inline = false;
1941 if (new_defines_function
1942 && ((DECL_INTERFACE_KNOWN (olddecl)
1943 && TREE_CODE (olddecl) == FUNCTION_DECL)
1944 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1945 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1946 == FUNCTION_DECL))))
1950 if (TREE_CODE (fn) == TEMPLATE_DECL)
1951 fn = DECL_TEMPLATE_RESULT (olddecl);
1953 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1956 if (!new_redefines_gnu_inline)
1958 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1959 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1960 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1962 DECL_TEMPLATE_INSTANTIATED (newdecl)
1963 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1964 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1966 /* If the OLDDECL is an instantiation and/or specialization,
1967 then the NEWDECL must be too. But, it may not yet be marked
1968 as such if the caller has created NEWDECL, but has not yet
1969 figured out that it is a redeclaration. */
1970 if (!DECL_USE_TEMPLATE (newdecl))
1971 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1973 /* Don't really know how much of the language-specific
1974 values we should copy from old to new. */
1975 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1976 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1977 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1978 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1980 if (LANG_DECL_HAS_MIN (newdecl))
1982 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1983 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1984 if (DECL_TEMPLATE_INFO (newdecl))
1985 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1986 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1988 /* Only functions have these fields. */
1989 if (TREE_CODE (newdecl) == FUNCTION_DECL
1990 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1992 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1993 olddecl_friend = DECL_FRIEND_P (olddecl);
1994 hidden_friend = (DECL_ANTICIPATED (olddecl)
1995 && DECL_HIDDEN_FRIEND_P (olddecl)
1996 && newdecl_is_friend);
1997 DECL_BEFRIENDING_CLASSES (newdecl)
1998 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1999 DECL_BEFRIENDING_CLASSES (olddecl));
2000 /* DECL_THUNKS is only valid for virtual functions,
2001 otherwise it is a DECL_FRIEND_CONTEXT. */
2002 if (DECL_VIRTUAL_P (newdecl))
2003 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2005 /* Only variables have this field. */
2006 else if (TREE_CODE (newdecl) == VAR_DECL
2007 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2008 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2011 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2015 /* Merge parameter attributes. */
2016 tree oldarg, newarg;
2017 for (oldarg = DECL_ARGUMENTS(olddecl),
2018 newarg = DECL_ARGUMENTS(newdecl);
2020 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2021 DECL_ATTRIBUTES (newarg)
2022 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2023 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2026 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2027 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2029 /* If newdecl is not a specialization, then it is not a
2030 template-related function at all. And that means that we
2031 should have exited above, returning 0. */
2032 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2034 if (DECL_ODR_USED (olddecl))
2035 /* From [temp.expl.spec]:
2037 If a template, a member template or the member of a class
2038 template is explicitly specialized then that
2039 specialization shall be declared before the first use of
2040 that specialization that would cause an implicit
2041 instantiation to take place, in every translation unit in
2042 which such a use occurs. */
2043 error ("explicit specialization of %qD after first use",
2046 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2048 /* Don't propagate visibility from the template to the
2049 specialization here. We'll do that in determine_visibility if
2051 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2053 /* [temp.expl.spec/14] We don't inline explicit specialization
2054 just because the primary template says so. */
2056 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2057 the always_inline attribute. */
2058 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2059 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2061 if (DECL_DECLARED_INLINE_P (newdecl))
2062 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2064 DECL_ATTRIBUTES (newdecl)
2065 = remove_attribute ("always_inline",
2066 DECL_ATTRIBUTES (newdecl));
2069 else if (new_defines_function && DECL_INITIAL (olddecl))
2071 /* Never inline re-defined extern inline functions.
2072 FIXME: this could be better handled by keeping both
2073 function as separate declarations. */
2074 DECL_UNINLINABLE (newdecl) = 1;
2078 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2079 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2081 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2083 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2084 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2086 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2087 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2088 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2089 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2092 /* Preserve abstractness on cloned [cd]tors. */
2093 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2095 /* Update newdecl's parms to point at olddecl. */
2096 for (parm = DECL_ARGUMENTS (newdecl); parm;
2097 parm = DECL_CHAIN (parm))
2098 DECL_CONTEXT (parm) = olddecl;
2102 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2103 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2104 COPY_DECL_RTL (newdecl, olddecl);
2106 if (! types_match || new_defines_function)
2108 /* These need to be copied so that the names are available.
2109 Note that if the types do match, we'll preserve inline
2110 info and other bits, but if not, we won't. */
2111 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2112 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2114 if (new_defines_function)
2115 /* If defining a function declared with other language
2116 linkage, use the previously declared language linkage. */
2117 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2118 else if (types_match)
2120 /* If redeclaring a builtin function, and not a definition,
2121 it stays built in. */
2122 if (DECL_BUILT_IN (olddecl))
2124 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2125 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2126 /* If we're keeping the built-in definition, keep the rtl,
2127 regardless of declaration matches. */
2128 COPY_DECL_RTL (olddecl, newdecl);
2131 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2132 /* Don't clear out the arguments if we're just redeclaring a
2134 if (DECL_ARGUMENTS (olddecl))
2135 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2138 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2139 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2141 /* Now preserve various other info from the definition. */
2142 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2143 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2144 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2145 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2147 /* Warn about conflicting visibility specifications. */
2148 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2149 && DECL_VISIBILITY_SPECIFIED (newdecl)
2150 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2152 warning_at (input_location, OPT_Wattributes,
2153 "%q+D: visibility attribute ignored because it", newdecl);
2154 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2155 "conflicts with previous declaration here");
2157 /* Choose the declaration which specified visibility. */
2158 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2160 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2161 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2163 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2164 so keep this behavior. */
2165 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2167 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2168 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2170 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2171 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2172 if (TREE_CODE (newdecl) == FIELD_DECL)
2173 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2175 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2176 with that from NEWDECL below. */
2177 if (DECL_LANG_SPECIFIC (olddecl))
2179 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2180 != DECL_LANG_SPECIFIC (newdecl));
2181 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2184 /* Merge the USED information. */
2185 if (TREE_USED (olddecl))
2186 TREE_USED (newdecl) = 1;
2187 else if (TREE_USED (newdecl))
2188 TREE_USED (olddecl) = 1;
2189 if (TREE_CODE (newdecl) == VAR_DECL)
2191 if (DECL_READ_P (olddecl))
2192 DECL_READ_P (newdecl) = 1;
2193 else if (DECL_READ_P (newdecl))
2194 DECL_READ_P (olddecl) = 1;
2196 if (DECL_PRESERVE_P (olddecl))
2197 DECL_PRESERVE_P (newdecl) = 1;
2198 else if (DECL_PRESERVE_P (newdecl))
2199 DECL_PRESERVE_P (olddecl) = 1;
2201 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2205 function_size = sizeof (struct tree_decl_common);
2207 memcpy ((char *) olddecl + sizeof (struct tree_common),
2208 (char *) newdecl + sizeof (struct tree_common),
2209 function_size - sizeof (struct tree_common));
2211 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2212 (char *) newdecl + sizeof (struct tree_decl_common),
2213 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2214 if (new_template_info)
2215 /* If newdecl is a template instantiation, it is possible that
2216 the following sequence of events has occurred:
2218 o A friend function was declared in a class template. The
2219 class template was instantiated.
2221 o The instantiation of the friend declaration was
2222 recorded on the instantiation list, and is newdecl.
2224 o Later, however, instantiate_class_template called pushdecl
2225 on the newdecl to perform name injection. But, pushdecl in
2226 turn called duplicate_decls when it discovered that another
2227 declaration of a global function with the same name already
2230 o Here, in duplicate_decls, we decided to clobber newdecl.
2232 If we're going to do that, we'd better make sure that
2233 olddecl, and not newdecl, is on the list of
2234 instantiations so that if we try to do the instantiation
2235 again we won't get the clobbered declaration. */
2236 reregister_specialization (newdecl,
2242 size_t size = tree_code_size (TREE_CODE (olddecl));
2243 memcpy ((char *) olddecl + sizeof (struct tree_common),
2244 (char *) newdecl + sizeof (struct tree_common),
2245 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2246 switch (TREE_CODE (olddecl))
2256 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2257 (char *) newdecl + sizeof (struct tree_decl_common),
2258 size - sizeof (struct tree_decl_common)
2259 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2263 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2264 (char *) newdecl + sizeof (struct tree_decl_common),
2265 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2266 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2270 DECL_UID (olddecl) = olddecl_uid;
2272 DECL_FRIEND_P (olddecl) = 1;
2275 DECL_ANTICIPATED (olddecl) = 1;
2276 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2279 /* NEWDECL contains the merged attribute lists.
2280 Update OLDDECL to be the same. */
2281 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2283 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2284 so that encode_section_info has a chance to look at the new decl
2285 flags and attributes. */
2286 if (DECL_RTL_SET_P (olddecl)
2287 && (TREE_CODE (olddecl) == FUNCTION_DECL
2288 || (TREE_CODE (olddecl) == VAR_DECL
2289 && TREE_STATIC (olddecl))))
2290 make_decl_rtl (olddecl);
2292 /* The NEWDECL will no longer be needed. Because every out-of-class
2293 declaration of a member results in a call to duplicate_decls,
2294 freeing these nodes represents in a significant savings. */
2300 /* Return zero if the declaration NEWDECL is valid
2301 when the declaration OLDDECL (assumed to be for the same name)
2302 has already been seen.
2303 Otherwise return an error message format string with a %s
2304 where the identifier should go. */
2307 redeclaration_error_message (tree newdecl, tree olddecl)
2309 if (TREE_CODE (newdecl) == TYPE_DECL)
2311 /* Because C++ can put things into name space for free,
2312 constructs like "typedef struct foo { ... } foo"
2313 would look like an erroneous redeclaration. */
2314 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2317 return G_("redefinition of %q#D");
2319 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2321 /* If this is a pure function, its olddecl will actually be
2322 the original initialization to `0' (which we force to call
2323 abort()). Don't complain about redefinition in this case. */
2324 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2325 && DECL_INITIAL (olddecl) == NULL_TREE)
2328 /* If both functions come from different namespaces, this is not
2329 a redeclaration - this is a conflict with a used function. */
2330 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2331 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2332 && ! decls_match (olddecl, newdecl))
2333 return G_("%qD conflicts with used function");
2335 /* We'll complain about linkage mismatches in
2336 warn_extern_redeclared_static. */
2338 /* Defining the same name twice is no good. */
2339 if (DECL_INITIAL (olddecl) != NULL_TREE
2340 && DECL_INITIAL (newdecl) != NULL_TREE)
2342 if (DECL_NAME (olddecl) == NULL_TREE)
2343 return G_("%q#D not declared in class");
2344 else if (!GNU_INLINE_P (olddecl)
2345 || GNU_INLINE_P (newdecl))
2346 return G_("redefinition of %q#D");
2349 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2351 bool olda = GNU_INLINE_P (olddecl);
2352 bool newa = GNU_INLINE_P (newdecl);
2357 return G_("%q+D redeclared inline with "
2358 "%<gnu_inline%> attribute");
2360 return G_("%q+D redeclared inline without "
2361 "%<gnu_inline%> attribute");
2367 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2371 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2373 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2374 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2375 return G_("redefinition of %q#D");
2379 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2380 || (DECL_TEMPLATE_RESULT (newdecl)
2381 == DECL_TEMPLATE_RESULT (olddecl)))
2384 nt = DECL_TEMPLATE_RESULT (newdecl);
2385 if (DECL_TEMPLATE_INFO (nt))
2386 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2387 ot = DECL_TEMPLATE_RESULT (olddecl);
2388 if (DECL_TEMPLATE_INFO (ot))
2389 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2390 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2391 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2392 return G_("redefinition of %q#D");
2394 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2396 bool olda = GNU_INLINE_P (ot);
2397 bool newa = GNU_INLINE_P (nt);
2402 return G_("%q+D redeclared inline with "
2403 "%<gnu_inline%> attribute");
2405 return G_("%q+D redeclared inline without "
2406 "%<gnu_inline%> attribute");
2410 /* Core issue #226 (C++0x):
2412 If a friend function template declaration specifies a
2413 default template-argument, that declaration shall be a
2414 definition and shall be the only declaration of the
2415 function template in the translation unit. */
2416 if ((cxx_dialect != cxx98)
2417 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2418 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2419 /*is_primary=*/1, /*is_partial=*/0,
2420 /*is_friend_decl=*/2))
2421 return G_("redeclaration of friend %q#D "
2422 "may not have default template arguments");
2426 else if (TREE_CODE (newdecl) == VAR_DECL
2427 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2428 && (! DECL_LANG_SPECIFIC (olddecl)
2429 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2430 || DECL_THREAD_LOCAL_P (newdecl)))
2432 /* Only variables can be thread-local, and all declarations must
2433 agree on this property. */
2434 if (DECL_THREAD_LOCAL_P (newdecl))
2435 return G_("thread-local declaration of %q#D follows "
2436 "non-thread-local declaration");
2438 return G_("non-thread-local declaration of %q#D follows "
2439 "thread-local declaration");
2441 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2443 /* The objects have been declared at namespace scope. If either
2444 is a member of an anonymous union, then this is an invalid
2445 redeclaration. For example:
2451 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2452 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2453 return G_("redeclaration of %q#D");
2454 /* If at least one declaration is a reference, there is no
2455 conflict. For example:
2461 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2463 /* Reject two definitions. */
2464 return G_("redefinition of %q#D");
2468 /* Objects declared with block scope: */
2469 /* Reject two definitions, and reject a definition
2470 together with an external reference. */
2471 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2472 return G_("redeclaration of %q#D");
2477 /* Hash and equality functions for the named_label table. */
2480 named_label_entry_hash (const void *data)
2482 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2483 return DECL_UID (ent->label_decl);
2487 named_label_entry_eq (const void *a, const void *b)
2489 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2490 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2491 return ent_a->label_decl == ent_b->label_decl;
2494 /* Create a new label, named ID. */
2497 make_label_decl (tree id, int local_p)
2499 struct named_label_entry *ent;
2503 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2505 DECL_CONTEXT (decl) = current_function_decl;
2506 DECL_MODE (decl) = VOIDmode;
2507 C_DECLARED_LABEL_FLAG (decl) = local_p;
2509 /* Say where one reference is to the label, for the sake of the
2510 error if it is not defined. */
2511 DECL_SOURCE_LOCATION (decl) = input_location;
2513 /* Record the fact that this identifier is bound to this label. */
2514 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2516 /* Create the label htab for the function on demand. */
2518 named_labels = htab_create_ggc (13, named_label_entry_hash,
2519 named_label_entry_eq, NULL);
2521 /* Record this label on the list of labels used in this function.
2522 We do this before calling make_label_decl so that we get the
2523 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2524 ent = ggc_alloc_cleared_named_label_entry ();
2525 ent->label_decl = decl;
2527 slot = htab_find_slot (named_labels, ent, INSERT);
2528 gcc_assert (*slot == NULL);
2534 /* Look for a label named ID in the current function. If one cannot
2535 be found, create one. (We keep track of used, but undefined,
2536 labels, and complain about them at the end of a function.) */
2539 lookup_label (tree id)
2543 timevar_push (TV_NAME_LOOKUP);
2544 /* You can't use labels at global scope. */
2545 if (current_function_decl == NULL_TREE)
2547 error ("label %qE referenced outside of any function", id);
2548 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2551 /* See if we've already got this label. */
2552 decl = IDENTIFIER_LABEL_VALUE (id);
2553 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2554 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2556 decl = make_label_decl (id, /*local_p=*/0);
2557 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2560 /* Declare a local label named ID. */
2563 declare_local_label (tree id)
2566 cp_label_binding *bind;
2568 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2569 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2570 bind = VEC_safe_push (cp_label_binding, gc,
2571 current_binding_level->shadowed_labels, NULL);
2572 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2574 decl = make_label_decl (id, /*local_p=*/1);
2580 /* Returns nonzero if it is ill-formed to jump past the declaration of
2581 DECL. Returns 2 if it's also a real problem. */
2584 decl_jump_unsafe (tree decl)
2586 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2587 with automatic storage duration is not in scope to a point where it is
2588 in scope is ill-formed unless the variable has scalar type, class type
2589 with a trivial default constructor and a trivial destructor, a
2590 cv-qualified version of one of these types, or an array of one of the
2591 preceding types and is declared without an initializer (8.5). */
2592 tree type = TREE_TYPE (decl);
2594 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2595 || type == error_mark_node)
2598 type = strip_array_types (type);
2600 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2601 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2604 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2610 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2613 identify_goto (tree decl, const location_t *locus)
2616 permerror (input_location, "jump to label %qD", decl);
2618 permerror (input_location, "jump to case label");
2620 permerror (*locus, " from here");
2623 /* Check that a single previously seen jump to a newly defined label
2624 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2625 the jump context; NAMES are the names in scope in LEVEL at the jump
2626 context; LOCUS is the source position of the jump or 0. Returns
2627 true if all is well. */
2630 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2631 bool exited_omp, const location_t *locus)
2633 struct cp_binding_level *b;
2634 bool identified = false, saw_eh = false, saw_omp = false;
2638 identify_goto (decl, locus);
2639 error (" exits OpenMP structured block");
2640 identified = saw_omp = true;
2643 for (b = current_binding_level; b ; b = b->level_chain)
2645 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2647 for (new_decls = b->names; new_decls != old_decls;
2648 new_decls = DECL_CHAIN (new_decls))
2650 int problem = decl_jump_unsafe (new_decls);
2656 identify_goto (decl, locus);
2660 error (" crosses initialization of %q+#D", new_decls);
2662 permerror (input_location, " enters scope of %q+#D which has "
2663 "non-trivial destructor", new_decls);
2668 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2672 identify_goto (decl, locus);
2675 if (b->kind == sk_try)
2676 error (" enters try block");
2678 error (" enters catch block");
2681 if (b->kind == sk_omp && !saw_omp)
2685 identify_goto (decl, locus);
2688 error (" enters OpenMP structured block");
2697 check_previous_goto (tree decl, struct named_label_use_entry *use)
2699 check_previous_goto_1 (decl, use->binding_level,
2700 use->names_in_scope, use->in_omp_scope,
2701 &use->o_goto_locus);
2705 check_switch_goto (struct cp_binding_level* level)
2707 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2710 /* Check that a new jump to a label DECL is OK. Called by
2711 finish_goto_stmt. */
2714 check_goto (tree decl)
2716 struct named_label_entry *ent, dummy;
2717 bool saw_catch = false, identified = false;
2721 /* We can't know where a computed goto is jumping.
2722 So we assume that it's OK. */
2723 if (TREE_CODE (decl) != LABEL_DECL)
2726 /* We didn't record any information about this label when we created it,
2727 and there's not much point since it's trivial to analyze as a return. */
2728 if (decl == cdtor_label)
2731 dummy.label_decl = decl;
2732 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2733 gcc_assert (ent != NULL);
2735 /* If the label hasn't been defined yet, defer checking. */
2736 if (! DECL_INITIAL (decl))
2738 struct named_label_use_entry *new_use;
2740 /* Don't bother creating another use if the last goto had the
2741 same data, and will therefore create the same set of errors. */
2743 && ent->uses->names_in_scope == current_binding_level->names)
2746 new_use = ggc_alloc_named_label_use_entry ();
2747 new_use->binding_level = current_binding_level;
2748 new_use->names_in_scope = current_binding_level->names;
2749 new_use->o_goto_locus = input_location;
2750 new_use->in_omp_scope = false;
2752 new_use->next = ent->uses;
2753 ent->uses = new_use;
2757 if (ent->in_try_scope || ent->in_catch_scope
2758 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2760 permerror (input_location, "jump to label %q+D", decl);
2761 permerror (input_location, " from here");
2765 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2767 int u = decl_jump_unsafe (bad);
2769 if (u > 1 && DECL_ARTIFICIAL (bad))
2771 /* Can't skip init of __exception_info. */
2772 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2776 error (" skips initialization of %q+#D", bad);
2778 permerror (input_location, " enters scope of %q+#D which has "
2779 "non-trivial destructor", bad);
2782 if (ent->in_try_scope)
2783 error (" enters try block");
2784 else if (ent->in_catch_scope && !saw_catch)
2785 error (" enters catch block");
2787 if (ent->in_omp_scope)
2788 error (" enters OpenMP structured block");
2789 else if (flag_openmp)
2791 struct cp_binding_level *b;
2792 for (b = current_binding_level; b ; b = b->level_chain)
2794 if (b == ent->binding_level)
2796 if (b->kind == sk_omp)
2800 permerror (input_location, "jump to label %q+D", decl);
2801 permerror (input_location, " from here");
2804 error (" exits OpenMP structured block");
2811 /* Check that a return is ok wrt OpenMP structured blocks.
2812 Called by finish_return_stmt. Returns true if all is well. */
2815 check_omp_return (void)
2817 struct cp_binding_level *b;
2818 for (b = current_binding_level; b ; b = b->level_chain)
2819 if (b->kind == sk_omp)
2821 error ("invalid exit from OpenMP structured block");
2827 /* Define a label, specifying the location in the source file.
2828 Return the LABEL_DECL node for the label. */
2831 define_label (location_t location, tree name)
2833 struct named_label_entry *ent, dummy;
2834 struct cp_binding_level *p;
2837 timevar_push (TV_NAME_LOOKUP);
2839 decl = lookup_label (name);
2841 dummy.label_decl = decl;
2842 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2843 gcc_assert (ent != NULL);
2845 /* After labels, make any new cleanups in the function go into their
2846 own new (temporary) binding contour. */
2847 for (p = current_binding_level;
2848 p->kind != sk_function_parms;
2850 p->more_cleanups_ok = 0;
2852 if (name == get_identifier ("wchar_t"))
2853 permerror (input_location, "label named wchar_t");
2855 if (DECL_INITIAL (decl) != NULL_TREE)
2857 error ("duplicate label %qD", decl);
2858 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2862 struct named_label_use_entry *use;
2864 /* Mark label as having been defined. */
2865 DECL_INITIAL (decl) = error_mark_node;
2866 /* Say where in the source. */
2867 DECL_SOURCE_LOCATION (decl) = location;
2869 ent->binding_level = current_binding_level;
2870 ent->names_in_scope = current_binding_level->names;
2872 for (use = ent->uses; use ; use = use->next)
2873 check_previous_goto (decl, use);
2877 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2882 struct cp_binding_level *level;
2883 struct cp_switch *next;
2884 /* The SWITCH_STMT being built. */
2886 /* A splay-tree mapping the low element of a case range to the high
2887 element, or NULL_TREE if there is no high element. Used to
2888 determine whether or not a new case label duplicates an old case
2889 label. We need a tree, rather than simply a hash table, because
2890 of the GNU case range extension. */
2894 /* A stack of the currently active switch statements. The innermost
2895 switch statement is on the top of the stack. There is no need to
2896 mark the stack for garbage collection because it is only active
2897 during the processing of the body of a function, and we never
2898 collect at that point. */
2900 static struct cp_switch *switch_stack;
2902 /* Called right after a switch-statement condition is parsed.
2903 SWITCH_STMT is the switch statement being parsed. */
2906 push_switch (tree switch_stmt)
2908 struct cp_switch *p = XNEW (struct cp_switch);
2909 p->level = current_binding_level;
2910 p->next = switch_stack;
2911 p->switch_stmt = switch_stmt;
2912 p->cases = splay_tree_new (case_compare, NULL, NULL);
2919 struct cp_switch *cs = switch_stack;
2920 location_t switch_location;
2922 /* Emit warnings as needed. */
2923 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2924 if (!processing_template_decl)
2925 c_do_switch_warnings (cs->cases, switch_location,
2926 SWITCH_STMT_TYPE (cs->switch_stmt),
2927 SWITCH_STMT_COND (cs->switch_stmt));
2929 splay_tree_delete (cs->cases);
2930 switch_stack = switch_stack->next;
2934 /* Note that we've seen a definition of a case label, and complain if this
2935 is a bad place for one. */
2938 finish_case_label (location_t loc, tree low_value, tree high_value)
2941 struct cp_binding_level *p;
2943 if (processing_template_decl)
2947 /* For templates, just add the case label; we'll do semantic
2948 analysis at instantiation-time. */
2949 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2950 return add_stmt (build_case_label (loc, low_value, high_value, label));
2953 /* Find the condition on which this switch statement depends. */
2954 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2955 if (cond && TREE_CODE (cond) == TREE_LIST)
2956 cond = TREE_VALUE (cond);
2958 if (!check_switch_goto (switch_stack->level))
2959 return error_mark_node;
2962 low_value = cxx_constant_value (low_value);
2964 high_value = cxx_constant_value (high_value);
2966 r = c_add_case_label (loc, switch_stack->cases, cond,
2967 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2968 low_value, high_value);
2970 /* After labels, make any new cleanups in the function go into their
2971 own new (temporary) binding contour. */
2972 for (p = current_binding_level;
2973 p->kind != sk_function_parms;
2975 p->more_cleanups_ok = 0;
2980 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2983 typename_hash (const void* k)
2986 const_tree const t = (const_tree) k;
2988 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2989 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2994 typedef struct typename_info {
3002 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3003 really of type `typename_info*' */
3006 typename_compare (const void * k1, const void * k2)
3008 const_tree const t1 = (const_tree) k1;
3009 const typename_info *const t2 = (const typename_info *) k2;
3011 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3012 && TYPE_CONTEXT (t1) == t2->scope
3013 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3014 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3015 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3018 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3019 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3021 Returns the new TYPENAME_TYPE. */
3023 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3026 build_typename_type (tree context, tree name, tree fullname,
3027 enum tag_types tag_type)
3035 if (typename_htab == NULL)
3036 typename_htab = htab_create_ggc (61, &typename_hash,
3037 &typename_compare, NULL);
3039 ti.scope = FROB_CONTEXT (context);
3041 ti.template_id = fullname;
3042 ti.enum_p = tag_type == enum_type;
3043 ti.class_p = (tag_type == class_type
3044 || tag_type == record_type
3045 || tag_type == union_type);
3046 hash = (htab_hash_pointer (ti.scope)
3047 ^ htab_hash_pointer (ti.name));
3049 /* See if we already have this type. */
3050 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3055 /* Build the TYPENAME_TYPE. */
3056 t = cxx_make_type (TYPENAME_TYPE);
3057 TYPE_CONTEXT (t) = ti.scope;
3058 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3059 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3060 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3062 /* Build the corresponding TYPE_DECL. */
3063 d = build_decl (input_location, TYPE_DECL, name, t);
3064 TYPE_NAME (TREE_TYPE (d)) = d;
3065 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3066 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3067 DECL_ARTIFICIAL (d) = 1;
3069 /* Store it in the hash table. */
3072 /* TYPENAME_TYPEs must always be compared structurally, because
3073 they may or may not resolve down to another type depending on
3074 the currently open classes. */
3075 SET_TYPE_STRUCTURAL_EQUALITY (t);
3081 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3082 provided to name the type. Returns an appropriate type, unless an
3083 error occurs, in which case error_mark_node is returned. If we
3084 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3085 return that, rather than the _TYPE it corresponds to, in other
3086 cases we look through the type decl. If TF_ERROR is set, complain
3087 about errors, otherwise be quiet. */
3090 make_typename_type (tree context, tree name, enum tag_types tag_type,
3091 tsubst_flags_t complain)
3097 if (name == error_mark_node
3098 || context == NULL_TREE
3099 || context == error_mark_node)
3100 return error_mark_node;
3104 if (!(TYPE_LANG_SPECIFIC (name)
3105 && (CLASSTYPE_IS_TEMPLATE (name)
3106 || CLASSTYPE_USE_TEMPLATE (name))))
3107 name = TYPE_IDENTIFIER (name);
3109 /* Create a TEMPLATE_ID_EXPR for the type. */
3110 name = build_nt (TEMPLATE_ID_EXPR,
3111 CLASSTYPE_TI_TEMPLATE (name),
3112 CLASSTYPE_TI_ARGS (name));
3114 else if (TREE_CODE (name) == TYPE_DECL)
3115 name = DECL_NAME (name);
3119 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3121 name = TREE_OPERAND (name, 0);
3122 if (TREE_CODE (name) == TEMPLATE_DECL)
3123 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3124 else if (TREE_CODE (name) == OVERLOAD)
3126 error ("%qD is not a type", name);
3127 return error_mark_node;
3130 if (TREE_CODE (name) == TEMPLATE_DECL)
3132 error ("%qD used without template parameters", name);
3133 return error_mark_node;
3135 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3136 gcc_assert (TYPE_P (context));
3138 if (!MAYBE_CLASS_TYPE_P (context))
3140 if (complain & tf_error)
3141 error ("%q#T is not a class", context);
3142 return error_mark_node;
3145 /* When the CONTEXT is a dependent type, NAME could refer to a
3146 dependent base class of CONTEXT. But look inside it anyway
3147 if CONTEXT is a currently open scope, in case it refers to a
3148 member of the current instantiation or a non-dependent base;
3149 lookup will stop when we hit a dependent base. */
3150 if (!dependent_scope_p (context))
3151 /* We should only set WANT_TYPE when we're a nested typename type.
3152 Then we can give better diagnostics if we find a non-type. */
3153 t = lookup_field (context, name, 2, /*want_type=*/true);
3157 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3158 return build_typename_type (context, name, fullname, tag_type);
3160 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3164 if (complain & tf_error)
3165 error (want_template ? "no class template named %q#T in %q#T"
3166 : "no type named %q#T in %q#T", name, context);
3167 return error_mark_node;
3170 /* Pull out the template from an injected-class-name (or multiple). */
3172 t = maybe_get_template_decl_from_type_decl (t);
3174 if (TREE_CODE (t) == TREE_LIST)
3176 if (complain & tf_error)
3178 error ("lookup of %qT in %qT is ambiguous", name, context);
3179 print_candidates (t);
3181 return error_mark_node;
3184 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3186 if (complain & tf_error)
3187 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3189 return error_mark_node;
3191 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3193 if (complain & tf_error)
3194 error ("%<typename %T::%D%> names %q#T, which is not a type",
3196 return error_mark_node;
3199 if (complain & tf_error)
3200 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3202 /* If we are currently parsing a template and if T is a typedef accessed
3203 through CONTEXT then we need to remember and check access of T at
3204 template instantiation time. */
3205 add_typedef_to_current_template_for_access_check (t, context, input_location);
3208 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3210 /*entering_scope=*/0,
3211 tf_warning_or_error | tf_user);
3213 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3219 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3220 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3221 in which case error_mark_node is returned.
3223 If PARM_LIST is non-NULL, also make sure that the template parameter
3224 list of TEMPLATE_DECL matches.
3226 If COMPLAIN zero, don't complain about any errors that occur. */
3229 make_unbound_class_template (tree context, tree name, tree parm_list,
3230 tsubst_flags_t complain)
3236 name = TYPE_IDENTIFIER (name);
3237 else if (DECL_P (name))
3238 name = DECL_NAME (name);
3239 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3241 if (!dependent_type_p (context)
3242 || currently_open_class (context))
3244 tree tmpl = NULL_TREE;
3246 if (MAYBE_CLASS_TYPE_P (context))
3247 tmpl = lookup_field (context, name, 0, false);
3249 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3250 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3252 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3254 if (complain & tf_error)
3255 error ("no class template named %q#T in %q#T", name, context);
3256 return error_mark_node;
3260 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3262 if (complain & tf_error)
3264 error ("template parameters do not match template");
3265 error ("%q+D declared here", tmpl);
3267 return error_mark_node;
3270 if (complain & tf_error)
3271 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3276 /* Build the UNBOUND_CLASS_TEMPLATE. */
3277 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3278 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3279 TREE_TYPE (t) = NULL_TREE;
3280 SET_TYPE_STRUCTURAL_EQUALITY (t);
3282 /* Build the corresponding TEMPLATE_DECL. */
3283 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3284 TYPE_NAME (TREE_TYPE (d)) = d;
3285 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3286 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3287 DECL_ARTIFICIAL (d) = 1;
3288 DECL_TEMPLATE_PARMS (d) = parm_list;
3295 /* Push the declarations of builtin types into the namespace.
3296 RID_INDEX is the index of the builtin type in the array
3297 RID_POINTERS. NAME is the name used when looking up the builtin
3298 type. TYPE is the _TYPE node for the builtin type. */
3301 record_builtin_type (enum rid rid_index,
3305 tree rname = NULL_TREE, tname = NULL_TREE;
3306 tree tdecl = NULL_TREE;
3308 if ((int) rid_index < (int) RID_MAX)
3309 rname = ridpointers[(int) rid_index];
3311 tname = get_identifier (name);
3313 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3314 eliminated. Built-in types should not be looked up name; their
3315 names are keywords that the parser can recognize. However, there
3316 is code in c-common.c that uses identifier_global_value to look
3317 up built-in types by name. */
3320 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3321 DECL_ARTIFICIAL (tdecl) = 1;
3322 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3328 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3329 DECL_ARTIFICIAL (tdecl) = 1;
3331 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3334 if (!TYPE_NAME (type))
3335 TYPE_NAME (type) = tdecl;
3338 debug_hooks->type_decl (tdecl, 0);
3341 /* Record one of the standard Java types.
3342 * Declare it as having the given NAME.
3343 * If SIZE > 0, it is the size of one of the integral types;
3344 * otherwise it is the negative of the size of one of the other types. */
3347 record_builtin_java_type (const char* name, int size)
3352 type = build_nonstandard_integer_type (size, 0);
3353 type = build_distinct_type_copy (type);
3355 else if (size > -32)
3358 /* "__java_char" or ""__java_boolean". */
3359 type = build_nonstandard_integer_type (-size, 1);
3360 type = build_distinct_type_copy (type);
3361 /* Get the signed type cached and attached to the unsigned type,
3362 so it doesn't get garbage-collected at "random" times,
3363 causing potential codegen differences out of different UIDs
3364 and different alias set numbers. */
3365 stype = build_nonstandard_integer_type (-size, 0);
3366 stype = build_distinct_type_copy (stype);
3367 TREE_CHAIN (type) = stype;
3368 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3371 { /* "__java_float" or ""__java_double". */
3372 type = make_node (REAL_TYPE);
3373 TYPE_PRECISION (type) = - size;
3376 record_builtin_type (RID_MAX, name, type);
3377 decl = TYPE_NAME (type);
3379 /* Suppress generate debug symbol entries for these types,
3380 since for normal C++ they are just clutter.
3381 However, push_lang_context undoes this if extern "Java" is seen. */
3382 DECL_IGNORED_P (decl) = 1;
3384 TYPE_FOR_JAVA (type) = 1;
3388 /* Push a type into the namespace so that the back ends ignore it. */
3391 record_unknown_type (tree type, const char* name)
3393 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3394 TYPE_DECL, get_identifier (name), type));
3395 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3396 DECL_IGNORED_P (decl) = 1;
3397 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3398 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3399 TYPE_ALIGN (type) = 1;
3400 TYPE_USER_ALIGN (type) = 0;
3401 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3404 /* A string for which we should create an IDENTIFIER_NODE at
3407 typedef struct predefined_identifier
3409 /* The name of the identifier. */
3410 const char *const name;
3411 /* The place where the IDENTIFIER_NODE should be stored. */
3413 /* Nonzero if this is the name of a constructor or destructor. */
3414 const int ctor_or_dtor_p;
3415 } predefined_identifier;
3417 /* Create all the predefined identifiers. */
3420 initialize_predefined_identifiers (void)
3422 const predefined_identifier *pid;
3424 /* A table of identifiers to create at startup. */
3425 static const predefined_identifier predefined_identifiers[] = {
3426 { "C++", &lang_name_cplusplus, 0 },
3427 { "C", &lang_name_c, 0 },
3428 { "Java", &lang_name_java, 0 },
3429 /* Some of these names have a trailing space so that it is
3430 impossible for them to conflict with names written by users. */
3431 { "__ct ", &ctor_identifier, 1 },
3432 { "__base_ctor ", &base_ctor_identifier, 1 },
3433 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3434 { "__dt ", &dtor_identifier, 1 },
3435 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3436 { "__base_dtor ", &base_dtor_identifier, 1 },
3437 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3438 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3439 { "nelts", &nelts_identifier, 0 },
3440 { THIS_NAME, &this_identifier, 0 },
3441 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3442 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3443 { "_vptr", &vptr_identifier, 0 },
3444 { "__vtt_parm", &vtt_parm_identifier, 0 },
3445 { "::", &global_scope_name, 0 },
3446 { "std", &std_identifier, 0 },
3450 for (pid = predefined_identifiers; pid->name; ++pid)
3452 *pid->node = get_identifier (pid->name);
3453 if (pid->ctor_or_dtor_p)
3454 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3458 /* Create the predefined scalar types of C,
3459 and some nodes representing standard constants (0, 1, (void *)0).
3460 Initialize the global binding level.
3461 Make definitions for built-in primitive functions. */
3464 cxx_init_decl_processing (void)
3467 tree void_ftype_ptr;
3469 build_common_tree_nodes (flag_signed_char);
3471 /* Create all the identifiers we need. */
3472 initialize_predefined_identifiers ();
3474 /* Create the global variables. */
3475 push_to_top_level ();
3477 current_function_decl = NULL_TREE;
3478 current_binding_level = NULL;
3479 /* Enter the global namespace. */
3480 gcc_assert (global_namespace == NULL_TREE);
3481 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3483 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3484 TREE_PUBLIC (global_namespace) = 1;
3485 begin_scope (sk_namespace, global_namespace);
3487 current_lang_name = NULL_TREE;
3489 if (flag_visibility_ms_compat)
3490 default_visibility = VISIBILITY_HIDDEN;
3493 current_lang_name = lang_name_c;
3495 /* Create the `std' namespace. */
3496 push_namespace (std_identifier);
3497 std_node = current_namespace;
3500 c_common_nodes_and_builtins ();
3502 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3503 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3504 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3505 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3506 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3507 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3508 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3509 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3511 integer_two_node = build_int_cst (NULL_TREE, 2);
3513 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3514 truthvalue_type_node = boolean_type_node;
3515 truthvalue_false_node = boolean_false_node;
3516 truthvalue_true_node = boolean_true_node;
3518 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3519 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3520 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3523 record_builtin_type (RID_MAX, NULL, string_type_node);
3526 delta_type_node = ptrdiff_type_node;
3527 vtable_index_type = ptrdiff_type_node;
3529 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3530 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3531 void_ftype_ptr = build_function_type_list (void_type_node,
3532 ptr_type_node, NULL_TREE);
3534 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3536 /* C++ extensions */
3538 unknown_type_node = make_node (LANG_TYPE);
3539 record_unknown_type (unknown_type_node, "unknown type");
3541 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3542 TREE_TYPE (unknown_type_node) = unknown_type_node;
3544 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3546 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3547 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3549 init_list_type_node = make_node (LANG_TYPE);
3550 record_unknown_type (init_list_type_node, "init list");
3553 /* Make sure we get a unique function type, so we can give
3554 its pointer type a name. (This wins for gdb.) */
3555 tree vfunc_type = make_node (FUNCTION_TYPE);
3556 TREE_TYPE (vfunc_type) = integer_type_node;
3557 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3558 layout_type (vfunc_type);
3560 vtable_entry_type = build_pointer_type (vfunc_type);
3562 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3565 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3566 layout_type (vtbl_type_node);
3567 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3568 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3569 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3570 layout_type (vtbl_ptr_type_node);
3571 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3573 push_namespace (get_identifier ("__cxxabiv1"));
3574 abi_node = current_namespace;
3577 global_type_node = make_node (LANG_TYPE);
3578 record_unknown_type (global_type_node, "global type");
3581 current_lang_name = lang_name_cplusplus;
3584 tree newtype, deltype;
3585 tree ptr_ftype_sizetype;
3589 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3590 if (cxx_dialect == cxx98)
3593 tree bad_alloc_type_node;
3594 tree bad_alloc_decl;
3596 push_namespace (std_identifier);
3597 bad_alloc_id = get_identifier ("bad_alloc");
3598 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3599 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3601 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3602 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3606 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3609 new_eh_spec = noexcept_false_spec;
3611 newtype = build_exception_variant (ptr_ftype_sizetype, new_eh_spec);
3612 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3613 push_cp_library_fn (NEW_EXPR, newtype);
3614 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3615 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3616 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3618 nullptr_type_node = make_node (NULLPTR_TYPE);
3619 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3620 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3621 TYPE_UNSIGNED (nullptr_type_node) = 1;
3622 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3623 SET_TYPE_MODE (nullptr_type_node, Pmode);
3624 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3625 nullptr_node = build_int_cst (nullptr_type_node, 0);
3629 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3631 /* Perform other language dependent initializations. */
3632 init_class_processing ();
3633 init_rtti_processing ();
3634 init_template_processing ();
3636 if (flag_exceptions)
3637 init_exception_processing ();
3639 if (! supports_one_only ())
3642 make_fname_decl = cp_make_fname_decl;
3643 start_fname_decls ();
3645 /* Show we use EH for cleanups. */
3646 if (flag_exceptions)
3647 using_eh_for_cleanups ();
3650 /* Generate an initializer for a function naming variable from
3651 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3652 filled in with the type of the init. */
3655 cp_fname_init (const char* name, tree *type_p)
3657 tree domain = NULL_TREE;
3659 tree init = NULL_TREE;
3664 length = strlen (name);
3665 domain = build_index_type (size_int (length));
3666 init = build_string (length + 1, name);
3669 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3670 type = build_cplus_array_type (type, domain);
3675 TREE_TYPE (init) = type;
3677 init = error_mark_node;
3682 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3683 the decl, LOC is the location to give the decl, NAME is the
3684 initialization string and TYPE_DEP indicates whether NAME depended
3685 on the type of the function. We make use of that to detect
3686 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3687 at the point of first use, so we mustn't push the decl now. */
3690 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3692 const char *const name = (type_dep && processing_template_decl
3693 ? NULL : fname_as_string (type_dep));
3695 tree init = cp_fname_init (name, &type);
3696 tree decl = build_decl (loc, VAR_DECL, id, type);
3699 free (CONST_CAST (char *, name));
3701 /* As we're using pushdecl_with_scope, we must set the context. */
3702 DECL_CONTEXT (decl) = current_function_decl;
3703 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3705 TREE_STATIC (decl) = 1;
3706 TREE_READONLY (decl) = 1;
3707 DECL_ARTIFICIAL (decl) = 1;
3709 TREE_USED (decl) = 1;
3711 if (current_function_decl)
3713 struct cp_binding_level *b = current_binding_level;
3714 if (b->kind == sk_function_parms)
3715 return error_mark_node;
3716 while (b->level_chain->kind != sk_function_parms)
3718 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3719 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3720 LOOKUP_ONLYCONVERTING);
3724 DECL_THIS_STATIC (decl) = true;
3725 pushdecl_top_level_and_finish (decl, init);
3732 builtin_function_1 (tree decl, tree context, bool is_global)
3734 tree id = DECL_NAME (decl);
3735 const char *name = IDENTIFIER_POINTER (id);
3737 retrofit_lang_decl (decl);
3739 DECL_ARTIFICIAL (decl) = 1;
3740 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3741 SET_DECL_LANGUAGE (decl, lang_c);
3742 /* Runtime library routines are, by definition, available in an
3743 external shared object. */
3744 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3745 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3747 DECL_CONTEXT (decl) = context;
3750 pushdecl_top_level (decl);
3754 /* A function in the user's namespace should have an explicit
3755 declaration before it is used. Mark the built-in function as
3756 anticipated but not actually declared. */
3757 if (name[0] != '_' || name[1] != '_')
3758 DECL_ANTICIPATED (decl) = 1;
3759 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3761 size_t len = strlen (name);
3763 /* Treat __*_chk fortification functions as anticipated as well,
3764 unless they are __builtin_*. */
3765 if (len > strlen ("___chk")
3766 && memcmp (name + len - strlen ("_chk"),
3767 "_chk", strlen ("_chk") + 1) == 0)
3768 DECL_ANTICIPATED (decl) = 1;
3775 cxx_builtin_function (tree decl)
3777 tree id = DECL_NAME (decl);
3778 const char *name = IDENTIFIER_POINTER (id);
3779 /* All builtins that don't begin with an '_' should additionally
3780 go in the 'std' namespace. */
3783 tree decl2 = copy_node(decl);
3784 push_namespace (std_identifier);
3785 builtin_function_1 (decl2, std_node, false);
3789 return builtin_function_1 (decl, NULL_TREE, false);
3792 /* Like cxx_builtin_function, but guarantee the function is added to the global
3793 scope. This is to allow function specific options to add new machine
3794 dependent builtins when the target ISA changes via attribute((target(...)))
3795 which saves space on program startup if the program does not use non-generic
3799 cxx_builtin_function_ext_scope (tree decl)
3802 tree id = DECL_NAME (decl);
3803 const char *name = IDENTIFIER_POINTER (id);
3804 /* All builtins that don't begin with an '_' should additionally
3805 go in the 'std' namespace. */
3808 tree decl2 = copy_node(decl);
3809 push_namespace (std_identifier);
3810 builtin_function_1 (decl2, std_node, true);
3814 return builtin_function_1 (decl, NULL_TREE, true);
3817 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3818 function. Not called directly. */
3821 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3823 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3824 DECL_EXTERNAL (fn) = 1;
3825 TREE_PUBLIC (fn) = 1;
3826 DECL_ARTIFICIAL (fn) = 1;
3827 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3828 SET_DECL_LANGUAGE (fn, lang_c);
3829 /* Runtime library routines are, by definition, available in an
3830 external shared object. */
3831 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3832 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3836 /* Returns the _DECL for a library function with C linkage.
3837 We assume that such functions never throw; if this is incorrect,
3838 callers should unset TREE_NOTHROW. */
3841 build_library_fn (tree name, tree type)
3843 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3844 TREE_NOTHROW (fn) = 1;
3848 /* Returns the _DECL for a library function with C++ linkage. */
3851 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3853 tree fn = build_library_fn_1 (name, operator_code, type);
3854 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3855 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3856 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3860 /* Like build_library_fn, but takes a C string instead of an
3864 build_library_fn_ptr (const char* name, tree type)
3866 return build_library_fn (get_identifier (name), type);
3869 /* Like build_cp_library_fn, but takes a C string instead of an
3873 build_cp_library_fn_ptr (const char* name, tree type)
3875 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3878 /* Like build_library_fn, but also pushes the function so that we will
3879 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3880 may throw exceptions listed in RAISES. */
3883 push_library_fn (tree name, tree type, tree raises)
3888 type = build_exception_variant (type, raises);
3890 fn = build_library_fn (name, type);
3891 pushdecl_top_level (fn);
3895 /* Like build_cp_library_fn, but also pushes the function so that it
3896 will be found by normal lookup. */
3899 push_cp_library_fn (enum tree_code operator_code, tree type)
3901 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3908 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3912 push_void_library_fn (tree name, tree parmtypes)
3914 tree type = build_function_type (void_type_node, parmtypes);
3915 return push_library_fn (name, type, NULL_TREE);
3918 /* Like push_library_fn, but also note that this function throws
3919 and does not return. Used for __throw_foo and the like. */
3922 push_throw_library_fn (tree name, tree type)
3924 tree fn = push_library_fn (name, type, NULL_TREE);
3925 TREE_THIS_VOLATILE (fn) = 1;
3926 TREE_NOTHROW (fn) = 0;
3930 /* When we call finish_struct for an anonymous union, we create
3931 default copy constructors and such. But, an anonymous union
3932 shouldn't have such things; this function undoes the damage to the
3933 anonymous union type T.
3935 (The reason that we create the synthesized methods is that we don't
3936 distinguish `union { int i; }' from `typedef union { int i; } U'.
3937 The first is an anonymous union; the second is just an ordinary
3941 fixup_anonymous_aggr (tree t)
3945 /* Wipe out memory of synthesized methods. */
3946 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3947 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3948 TYPE_HAS_COPY_CTOR (t) = 0;
3949 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
3950 TYPE_HAS_COPY_ASSIGN (t) = 0;
3951 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
3953 /* Splice the implicitly generated functions out of the TYPE_METHODS
3955 q = &TYPE_METHODS (t);
3958 if (DECL_ARTIFICIAL (*q))
3959 *q = TREE_CHAIN (*q);
3961 q = &DECL_CHAIN (*q);
3964 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3965 if (TYPE_METHODS (t))
3967 tree decl = TYPE_MAIN_DECL (t);
3969 if (TREE_CODE (t) != UNION_TYPE)
3970 error_at (DECL_SOURCE_LOCATION (decl),
3971 "an anonymous struct cannot have function members");
3973 error_at (DECL_SOURCE_LOCATION (decl),
3974 "an anonymous union cannot have function members");
3977 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3978 assignment operators (because they cannot have these methods themselves).
3979 For anonymous unions this is already checked because they are not allowed
3980 in any union, otherwise we have to check it. */
3981 if (TREE_CODE (t) != UNION_TYPE)
3985 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
3986 if (TREE_CODE (field) == FIELD_DECL)
3988 type = TREE_TYPE (field);
3989 if (CLASS_TYPE_P (type))
3991 if (TYPE_NEEDS_CONSTRUCTING (type))
3992 error ("member %q+#D with constructor not allowed "
3993 "in anonymous aggregate", field);
3994 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3995 error ("member %q+#D with destructor not allowed "
3996 "in anonymous aggregate", field);
3997 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
3998 error ("member %q+#D with copy assignment operator "
3999 "not allowed in anonymous aggregate", field);
4005 /* Make sure that a declaration with no declarator is well-formed, i.e.
4006 just declares a tagged type or anonymous union.
4008 Returns the type declared; or NULL_TREE if none. */
4011 check_tag_decl (cp_decl_specifier_seq *declspecs)
4013 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4014 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4015 /* If a class, struct, or enum type is declared by the DECLSPECS
4016 (i.e, if a class-specifier, enum-specifier, or non-typename
4017 elaborated-type-specifier appears in the DECLSPECS),
4018 DECLARED_TYPE is set to the corresponding type. */
4019 tree declared_type = NULL_TREE;
4020 bool error_p = false;
4022 if (declspecs->multiple_types_p)
4023 error ("multiple types in one declaration");
4024 else if (declspecs->redefined_builtin_type)
4026 if (!in_system_header)
4027 permerror (input_location, "redeclaration of C++ built-in type %qT",
4028 declspecs->redefined_builtin_type);
4033 && TYPE_P (declspecs->type)
4034 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4035 && MAYBE_CLASS_TYPE_P (declspecs->type))
4036 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4037 declared_type = declspecs->type;
4038 else if (declspecs->type == error_mark_node)
4040 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4041 permerror (input_location, "declaration does not declare anything");
4042 /* Check for an anonymous union. */
4043 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4044 && TYPE_ANONYMOUS_P (declared_type))
4046 /* 7/3 In a simple-declaration, the optional init-declarator-list
4047 can be omitted only when declaring a class (clause 9) or
4048 enumeration (7.2), that is, when the decl-specifier-seq contains
4049 either a class-specifier, an elaborated-type-specifier with
4050 a class-key (9.1), or an enum-specifier. In these cases and
4051 whenever a class-specifier or enum-specifier is present in the
4052 decl-specifier-seq, the identifiers in these specifiers are among
4053 the names being declared by the declaration (as class-name,
4054 enum-names, or enumerators, depending on the syntax). In such
4055 cases, and except for the declaration of an unnamed bit-field (9.6),
4056 the decl-specifier-seq shall introduce one or more names into the
4057 program, or shall redeclare a name introduced by a previous
4058 declaration. [Example:
4059 enum { }; // ill-formed
4060 typedef class { }; // ill-formed
4064 error ("missing type-name in typedef-declaration");
4067 /* Anonymous unions are objects, so they can have specifiers. */;
4068 SET_ANON_AGGR_TYPE_P (declared_type);
4070 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4071 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4076 if (declspecs->specs[(int)ds_inline]
4077 || declspecs->specs[(int)ds_virtual])
4078 error ("%qs can only be specified for functions",
4079 declspecs->specs[(int)ds_inline]
4080 ? "inline" : "virtual");
4082 && (!current_class_type
4083 || current_scope () != current_class_type))
4084 error ("%<friend%> can only be specified inside a class");
4085 else if (declspecs->specs[(int)ds_explicit])
4086 error ("%<explicit%> can only be specified for constructors");
4087 else if (declspecs->storage_class)
4088 error ("a storage class can only be specified for objects "
4090 else if (declspecs->specs[(int)ds_const]
4091 || declspecs->specs[(int)ds_volatile]
4092 || declspecs->specs[(int)ds_restrict]
4093 || declspecs->specs[(int)ds_thread])
4094 error ("qualifiers can only be specified for objects "
4096 else if (saw_typedef)
4097 warning (0, "%<typedef%> was ignored in this declaration");
4098 else if (declspecs->specs[(int) ds_constexpr])
4099 error ("%<constexpr%> cannot be used for type declarations");
4102 return declared_type;
4105 /* Called when a declaration is seen that contains no names to declare.
4106 If its type is a reference to a structure, union or enum inherited
4107 from a containing scope, shadow that tag name for the current scope
4108 with a forward reference.
4109 If its type defines a new named structure or union
4110 or defines an enum, it is valid but we need not do anything here.
4111 Otherwise, it is an error.
4113 C++: may have to grok the declspecs to learn about static,
4114 complain for anonymous unions.
4116 Returns the TYPE declared -- or NULL_TREE if none. */
4119 shadow_tag (cp_decl_specifier_seq *declspecs)
4121 tree t = check_tag_decl (declspecs);
4126 if (declspecs->attributes)
4128 warning (0, "attribute ignored in declaration of %q+#T", t);
4129 warning (0, "attribute for %q+#T must follow the %qs keyword",
4130 t, class_key_or_enum_as_string (t));
4134 if (maybe_process_partial_specialization (t) == error_mark_node)
4137 /* This is where the variables in an anonymous union are
4138 declared. An anonymous union declaration looks like:
4140 because there is no declarator after the union, the parser
4141 sends that declaration here. */
4142 if (ANON_AGGR_TYPE_P (t))
4144 fixup_anonymous_aggr (t);
4146 if (TYPE_FIELDS (t))
4148 tree decl = grokdeclarator (/*declarator=*/NULL,
4149 declspecs, NORMAL, 0, NULL);
4150 finish_anon_union (decl);
4157 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4160 groktypename (cp_decl_specifier_seq *type_specifiers,
4161 const cp_declarator *declarator,
4162 bool is_template_arg)
4166 enum decl_context context
4167 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4168 attrs = type_specifiers->attributes;
4169 type_specifiers->attributes = NULL_TREE;
4170 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4171 if (attrs && type != error_mark_node)
4173 if (CLASS_TYPE_P (type))
4174 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4175 "outside of definition", type);
4176 else if (MAYBE_CLASS_TYPE_P (type))
4177 /* A template type parameter or other dependent type. */
4178 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4179 "type %qT without an associated declaration", type);
4181 cplus_decl_attributes (&type, attrs, 0);
4186 /* Process a DECLARATOR for a function-scope variable declaration,
4187 namespace-scope variable declaration, or function declaration.
4188 (Function definitions go through start_function; class member
4189 declarations appearing in the body of the class go through
4190 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4191 If an error occurs, the error_mark_node is returned instead.
4193 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4194 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4195 for an explicitly defaulted function, or SD_DELETED for an explicitly
4196 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4197 implicitly initialized via a default constructor. ATTRIBUTES and
4198 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4199 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4200 set, the caller is responsible for calling pop_scope. */
4203 start_decl (const cp_declarator *declarator,
4204 cp_decl_specifier_seq *declspecs,
4207 tree prefix_attributes,
4208 tree *pushed_scope_p)
4216 *pushed_scope_p = NULL_TREE;
4218 /* An object declared as __attribute__((deprecated)) suppresses
4219 warnings of uses of other deprecated items. */
4220 if (lookup_attribute ("deprecated", attributes))
4221 deprecated_state = DEPRECATED_SUPPRESS;
4223 attributes = chainon (attributes, prefix_attributes);
4225 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4228 deprecated_state = DEPRECATED_NORMAL;
4230 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4231 || decl == error_mark_node)
4232 return error_mark_node;
4234 context = CP_DECL_CONTEXT (decl);
4235 if (context != global_namespace)
4236 *pushed_scope_p = push_scope (context);
4239 /* Is it valid for this decl to have an initializer at all?
4240 If not, set INITIALIZED to zero, which will indirectly
4241 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4242 switch (TREE_CODE (decl))
4245 error ("typedef %qD is initialized (use decltype instead)", decl);
4246 return error_mark_node;
4249 if (initialized == SD_DELETED)
4250 /* We'll handle the rest of the semantics later, but we need to
4251 set this now so it's visible to duplicate_decls. */
4252 DECL_DELETED_FN (decl) = 1;
4261 if (! toplevel_bindings_p ()
4262 && DECL_EXTERNAL (decl))
4263 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4265 DECL_EXTERNAL (decl) = 0;
4266 if (toplevel_bindings_p ())
4267 TREE_STATIC (decl) = 1;
4269 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4271 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4272 record_key_method_defined (decl);
4274 /* If this is a typedef that names the class for linkage purposes
4275 (7.1.3p8), apply any attributes directly to the type. */
4276 if (TREE_CODE (decl) == TYPE_DECL
4277 && TAGGED_TYPE_P (TREE_TYPE (decl))
4278 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4279 flags = ATTR_FLAG_TYPE_IN_PLACE;
4283 /* Set attributes here so if duplicate decl, will have proper attributes. */
4284 cplus_decl_attributes (&decl, attributes, flags);
4286 /* Dllimported symbols cannot be defined. Static data members (which
4287 can be initialized in-class and dllimported) go through grokfield,
4288 not here, so we don't need to exclude those decls when checking for
4290 if (initialized && DECL_DLLIMPORT_P (decl))
4292 error ("definition of %q#D is marked %<dllimport%>", decl);
4293 DECL_DLLIMPORT_P (decl) = 0;
4296 /* If #pragma weak was used, mark the decl weak now. */
4297 maybe_apply_pragma_weak (decl);
4299 if (TREE_CODE (decl) == FUNCTION_DECL
4300 && DECL_DECLARED_INLINE_P (decl)
4301 && DECL_UNINLINABLE (decl)
4302 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4303 warning (0, "inline function %q+D given attribute noinline", decl);
4305 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4307 if (TREE_CODE (decl) == VAR_DECL)
4309 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4310 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4311 error ("%q#D is not a static member of %q#T", decl, context);
4314 if (DECL_CONTEXT (field) != context)
4316 if (!same_type_p (DECL_CONTEXT (field), context))
4317 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4318 "to be defined as %<%T::%D%>",
4319 DECL_CONTEXT (field), DECL_NAME (decl),
4320 context, DECL_NAME (decl));
4321 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4323 if (processing_specialization
4324 && template_class_depth (context) == 0
4325 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4326 error ("template header not allowed in member definition "
4327 "of explicitly specialized class");
4328 /* Static data member are tricky; an in-class initialization
4329 still doesn't provide a definition, so the in-class
4330 declaration will have DECL_EXTERNAL set, but will have an
4331 initialization. Thus, duplicate_decls won't warn
4332 about this situation, and so we check here. */
4333 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4334 error ("duplicate initialization of %qD", decl);
4335 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4337 if (declspecs->specs[(int) ds_constexpr]
4338 && !DECL_DECLARED_CONSTEXPR_P (field))
4339 error ("%qD declared %<constexpr%> outside its class", field);
4344 tree field = check_classfn (context, decl,
4345 (processing_template_decl
4346 > template_class_depth (context))
4347 ? current_template_parms
4349 if (field && field != error_mark_node
4350 && duplicate_decls (decl, field,
4351 /*newdecl_is_friend=*/false))
4355 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4356 DECL_IN_AGGR_P (decl) = 0;
4357 /* Do not mark DECL as an explicit specialization if it was not
4358 already marked as an instantiation; a declaration should
4359 never be marked as a specialization unless we know what
4360 template is being specialized. */
4361 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4363 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4365 /* [temp.expl.spec] An explicit specialization of a static data
4366 member of a template is a definition if the declaration
4367 includes an initializer; otherwise, it is a declaration.
4369 We check for processing_specialization so this only applies
4370 to the new specialization syntax. */
4371 if (!initialized && processing_specialization)
4372 DECL_EXTERNAL (decl) = 1;
4375 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4376 /* Aliases are definitions. */
4378 permerror (input_location, "declaration of %q#D outside of class is not definition",
4382 was_public = TREE_PUBLIC (decl);
4384 /* Enter this declaration into the symbol table. */
4385 decl = maybe_push_decl (decl);
4387 if (processing_template_decl)
4388 decl = push_template_decl (decl);
4389 if (decl == error_mark_node)
4390 return error_mark_node;
4392 /* Tell the back end to use or not use .common as appropriate. If we say
4393 -fconserve-space, we want this to save .data space, at the expense of
4394 wrong semantics. If we say -fno-conserve-space, we want this to
4395 produce errors about redefs; to do this we force variables into the
4397 if (flag_conserve_space
4398 && TREE_CODE (decl) == VAR_DECL
4399 && TREE_PUBLIC (decl)
4400 && !DECL_THREAD_LOCAL_P (decl)
4401 && !have_global_bss_p ())
4402 DECL_COMMON (decl) = 1;
4404 if (TREE_CODE (decl) == VAR_DECL
4405 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4406 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4408 /* This is a const variable with implicit 'static'. Set
4409 DECL_THIS_STATIC so we can tell it from variables that are
4410 !TREE_PUBLIC because of the anonymous namespace. */
4411 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4412 DECL_THIS_STATIC (decl) = 1;
4415 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4416 start_decl_1 (decl, initialized);
4421 /* Process the declaration of a variable DECL. INITIALIZED is true
4422 iff DECL is explicitly initialized. (INITIALIZED is false if the
4423 variable is initialized via an implicitly-called constructor.)
4424 This function must be called for ordinary variables (including, for
4425 example, implicit instantiations of templates), but must not be
4426 called for template declarations. */
4429 start_decl_1 (tree decl, bool initialized)
4433 bool aggregate_definition_p;
4435 gcc_assert (!processing_template_decl);
4437 if (error_operand_p (decl))
4440 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4442 type = TREE_TYPE (decl);
4443 complete_p = COMPLETE_TYPE_P (type);
4444 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4446 /* If an explicit initializer is present, or if this is a definition
4447 of an aggregate, then we need a complete type at this point.
4448 (Scalars are always complete types, so there is nothing to
4449 check.) This code just sets COMPLETE_P; errors (if necessary)
4450 are issued below. */
4451 if ((initialized || aggregate_definition_p)
4453 && COMPLETE_TYPE_P (complete_type (type)))
4456 /* We will not yet have set TREE_READONLY on DECL if the type
4457 was "const", but incomplete, before this point. But, now, we
4458 have a complete type, so we can try again. */
4459 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4463 /* Is it valid for this decl to have an initializer at all? */
4465 /* Don't allow initializations for incomplete types except for
4466 arrays which might be completed by the initialization. */
4468 ; /* A complete type is ok. */
4469 else if (type_uses_auto (type))
4470 ; /* An auto type is ok. */
4471 else if (TREE_CODE (type) != ARRAY_TYPE)
4473 error ("variable %q#D has initializer but incomplete type", decl);
4474 type = TREE_TYPE (decl) = error_mark_node;
4476 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4478 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4479 error ("elements of array %q#D have incomplete type", decl);
4480 /* else we already gave an error in start_decl. */
4483 else if (aggregate_definition_p && !complete_p)
4485 if (type_uses_auto (type))
4486 error ("declaration of %q#D has no initializer", decl);
4488 error ("aggregate %q#D has incomplete type and cannot be defined",
4490 /* Change the type so that assemble_variable will give
4491 DECL an rtl we can live with: (mem (const_int 0)). */
4492 type = TREE_TYPE (decl) = error_mark_node;
4495 /* Create a new scope to hold this declaration if necessary.
4496 Whether or not a new scope is necessary cannot be determined
4497 until after the type has been completed; if the type is a
4498 specialization of a class template it is not until after
4499 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4500 will be set correctly. */
4501 maybe_push_cleanup_level (type);
4504 /* Handle initialization of references. DECL, TYPE, and INIT have the
4505 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4506 but will be set to a new CLEANUP_STMT if a temporary is created
4507 that must be destroyed subsequently.
4509 Returns an initializer expression to use to initialize DECL, or
4510 NULL if the initialization can be performed statically.
4512 Quotes on semantics can be found in ARM 8.4.3. */
4515 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4519 if (init == NULL_TREE)
4521 if ((DECL_LANG_SPECIFIC (decl) == 0
4522 || DECL_IN_AGGR_P (decl) == 0)
4523 && ! DECL_THIS_EXTERN (decl))
4524 error ("%qD declared as reference but not initialized", decl);
4528 if (TREE_CODE (init) == TREE_LIST)
4529 init = build_x_compound_expr_from_list (init, ELK_INIT,
4530 tf_warning_or_error);
4532 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4533 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4534 /* Note: default conversion is only called in very special cases. */
4535 init = decay_conversion (init);
4537 /* Convert INIT to the reference type TYPE. This may involve the
4538 creation of a temporary, whose lifetime must be the same as that
4539 of the reference. If so, a DECL_EXPR for the temporary will be
4540 added just after the DECL_EXPR for DECL. That's why we don't set
4541 DECL_INITIAL for local references (instead assigning to them
4542 explicitly); we need to allow the temporary to be initialized
4544 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4546 if (tmp == error_mark_node)
4548 else if (tmp == NULL_TREE)
4550 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4554 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4557 DECL_INITIAL (decl) = tmp;
4562 /* Subroutine of check_initializer. We're initializing a DECL of
4563 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4564 extend the lifetime of the underlying array to match that of the decl,
4565 just like for reference initialization. CLEANUP is as for
4566 grok_reference_init. */
4569 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4572 tree aggr_init, array, arrtype;
4573 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4574 if (error_operand_p (init))
4575 return error_mark_node;
4577 aggr_init = TARGET_EXPR_INITIAL (init);
4578 array = CONSTRUCTOR_ELT (aggr_init, 0)->value;
4579 arrtype = TREE_TYPE (array);
4581 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4582 array = TREE_OPERAND (array, 0);
4583 /* If the array is constant, finish_compound_literal already made it a
4584 static variable and we don't need to do anything here. */
4585 if (decl && TREE_CODE (array) == TARGET_EXPR)
4587 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4588 var = build_address (var);
4589 var = convert (arrtype, var);
4590 CONSTRUCTOR_ELT (aggr_init, 0)->value = var;
4595 /* Designated initializers in arrays are not supported in GNU C++.
4596 The parser cannot detect this error since it does not know whether
4597 a given brace-enclosed initializer is for a class type or for an
4598 array. This function checks that CE does not use a designated
4599 initializer. If it does, an error is issued. Returns true if CE
4600 is valid, i.e., does not have a designated initializer. */
4603 check_array_designated_initializer (const constructor_elt *ce)
4605 /* Designated initializers for array elements are not supported. */
4608 /* The parser only allows identifiers as designated
4610 if (ce->index == error_mark_node)
4611 error ("name used in a GNU-style designated "
4612 "initializer for an array");
4613 else if (TREE_CODE (ce->index) == INTEGER_CST)
4614 /* An index added by reshape_init. */
4618 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4619 error ("name %qD used in a GNU-style designated "
4620 "initializer for an array", ce->index);
4628 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4629 array until we finish parsing the initializer. If that's the
4630 situation we're in, update DECL accordingly. */
4633 maybe_deduce_size_from_array_init (tree decl, tree init)
4635 tree type = TREE_TYPE (decl);
4637 if (TREE_CODE (type) == ARRAY_TYPE
4638 && TYPE_DOMAIN (type) == NULL_TREE
4639 && TREE_CODE (decl) != TYPE_DECL)
4641 /* do_default is really a C-ism to deal with tentative definitions.
4642 But let's leave it here to ease the eventual merge. */
4643 int do_default = !DECL_EXTERNAL (decl);
4644 tree initializer = init ? init : DECL_INITIAL (decl);
4647 /* Check that there are no designated initializers in INIT, as
4648 those are not supported in GNU C++, and as the middle-end
4649 will crash if presented with a non-numeric designated
4651 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4653 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4654 constructor_elt *ce;
4656 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4657 if (!check_array_designated_initializer (ce))
4663 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4667 error ("initializer fails to determine size of %qD", decl);
4668 TREE_TYPE (decl) = error_mark_node;
4670 else if (failure == 2)
4674 error ("array size missing in %qD", decl);
4675 TREE_TYPE (decl) = error_mark_node;
4677 /* If a `static' var's size isn't known, make it extern as
4678 well as static, so it does not get allocated. If it's not
4679 `static', then don't mark it extern; finish_incomplete_decl
4680 will give it a default size and it will get allocated. */
4681 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4682 DECL_EXTERNAL (decl) = 1;
4684 else if (failure == 3)
4686 error ("zero-size array %qD", decl);
4687 TREE_TYPE (decl) = error_mark_node;
4691 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4693 relayout_decl (decl);
4697 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4698 any appropriate error messages regarding the layout. */
4701 layout_var_decl (tree decl)
4705 type = TREE_TYPE (decl);
4706 if (type == error_mark_node)
4709 /* If we haven't already layed out this declaration, do so now.
4710 Note that we must not call complete type for an external object
4711 because it's type might involve templates that we are not
4712 supposed to instantiate yet. (And it's perfectly valid to say
4713 `extern X x' for some incomplete type `X'.) */
4714 if (!DECL_EXTERNAL (decl))
4715 complete_type (type);
4716 if (!DECL_SIZE (decl)
4717 && TREE_TYPE (decl) != error_mark_node
4718 && (COMPLETE_TYPE_P (type)
4719 || (TREE_CODE (type) == ARRAY_TYPE
4720 && !TYPE_DOMAIN (type)
4721 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4722 layout_decl (decl, 0);
4724 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4726 /* An automatic variable with an incomplete type: that is an error.
4727 Don't talk about array types here, since we took care of that
4728 message in grokdeclarator. */
4729 error ("storage size of %qD isn%'t known", decl);
4730 TREE_TYPE (decl) = error_mark_node;
4733 /* Keep this code around in case we later want to control debug info
4734 based on whether a type is "used". (jason 1999-11-11) */
4736 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4737 /* Let debugger know it should output info for this type. */
4738 note_debug_info_needed (ttype);
4740 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4741 note_debug_info_needed (DECL_CONTEXT (decl));
4744 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4745 && DECL_SIZE (decl) != NULL_TREE
4746 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4748 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4749 constant_expression_warning (DECL_SIZE (decl));
4752 error ("storage size of %qD isn%'t constant", decl);
4753 TREE_TYPE (decl) = error_mark_node;
4758 /* If a local static variable is declared in an inline function, or if
4759 we have a weak definition, we must endeavor to create only one
4760 instance of the variable at link-time. */
4763 maybe_commonize_var (tree decl)
4765 /* Static data in a function with comdat linkage also has comdat
4767 if (TREE_STATIC (decl)
4768 /* Don't mess with __FUNCTION__. */
4769 && ! DECL_ARTIFICIAL (decl)
4770 && DECL_FUNCTION_SCOPE_P (decl)
4771 && vague_linkage_p (DECL_CONTEXT (decl)))
4775 /* With weak symbols, we simply make the variable COMDAT;
4776 that will cause copies in multiple translations units to
4778 comdat_linkage (decl);
4782 if (DECL_INITIAL (decl) == NULL_TREE
4783 || DECL_INITIAL (decl) == error_mark_node)
4785 /* Without weak symbols, we can use COMMON to merge
4786 uninitialized variables. */
4787 TREE_PUBLIC (decl) = 1;
4788 DECL_COMMON (decl) = 1;
4792 /* While for initialized variables, we must use internal
4793 linkage -- which means that multiple copies will not
4795 TREE_PUBLIC (decl) = 0;
4796 DECL_COMMON (decl) = 0;
4797 warning_at (input_location, 0,
4798 "sorry: semantics of inline function static "
4799 "data %q+#D are wrong (you%'ll wind up "
4800 "with multiple copies)", decl);
4801 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4802 " you can work around this by removing "
4807 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4808 /* Set it up again; we might have set DECL_INITIAL since the last
4810 comdat_linkage (decl);
4813 /* Issue an error message if DECL is an uninitialized const variable. */
4816 check_for_uninitialized_const_var (tree decl)
4818 tree type = strip_array_types (TREE_TYPE (decl));
4820 /* ``Unless explicitly declared extern, a const object does not have
4821 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4823 if (TREE_CODE (decl) == VAR_DECL
4824 && TREE_CODE (type) != REFERENCE_TYPE
4825 && CP_TYPE_CONST_P (type)
4826 && (!TYPE_NEEDS_CONSTRUCTING (type)
4827 || !type_has_user_provided_default_constructor (type))
4828 && !DECL_INITIAL (decl))
4830 permerror (DECL_SOURCE_LOCATION (decl),
4831 "uninitialized const %qD", decl);
4833 if (CLASS_TYPE_P (type)
4834 && !type_has_user_provided_default_constructor (type))
4836 tree defaulted_ctor;
4838 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4839 "%q#T has no user-provided default constructor", type);
4840 defaulted_ctor = in_class_defaulted_default_constructor (type);
4842 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4843 "constructor is not user-provided because it is "
4844 "explicitly defaulted in the class body");
4849 /* Structure holding the current initializer being processed by reshape_init.
4850 CUR is a pointer to the current element being processed, END is a pointer
4851 after the last element present in the initializer. */
4852 typedef struct reshape_iterator_t
4854 constructor_elt *cur;
4855 constructor_elt *end;
4858 static tree reshape_init_r (tree, reshape_iter *, bool);
4860 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4861 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4862 initialized. If there are no more such fields, the return value
4866 next_initializable_field (tree field)
4869 && (TREE_CODE (field) != FIELD_DECL
4870 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4871 || DECL_ARTIFICIAL (field)))
4872 field = DECL_CHAIN (field);
4877 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4878 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4879 INTEGER_CST representing the size of the array minus one (the maximum index),
4880 or NULL_TREE if the array was declared without specifying the size. D is
4881 the iterator within the constructor. */
4884 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4887 bool sized_array_p = (max_index != NULL_TREE);
4888 unsigned HOST_WIDE_INT max_index_cst = 0;
4889 unsigned HOST_WIDE_INT index;
4891 /* The initializer for an array is always a CONSTRUCTOR. */
4892 new_init = build_constructor (init_list_type_node, NULL);
4896 /* Minus 1 is used for zero sized arrays. */
4897 if (integer_all_onesp (max_index))
4900 if (host_integerp (max_index, 1))
4901 max_index_cst = tree_low_cst (max_index, 1);
4902 /* sizetype is sign extended, not zero extended. */
4904 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4908 /* Loop until there are no more initializers. */
4910 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4915 check_array_designated_initializer (d->cur);
4916 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4917 if (elt_init == error_mark_node)
4918 return error_mark_node;
4919 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4920 size_int (index), elt_init);
4921 if (!TREE_CONSTANT (elt_init))
4922 TREE_CONSTANT (new_init) = false;
4928 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4929 Parameters are the same of reshape_init_r. */
4932 reshape_init_array (tree type, reshape_iter *d)
4934 tree max_index = NULL_TREE;
4936 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4938 if (TYPE_DOMAIN (type))
4939 max_index = array_type_nelts (type);
4941 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4944 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4945 Parameters are the same of reshape_init_r. */
4948 reshape_init_vector (tree type, reshape_iter *d)
4950 tree max_index = NULL_TREE;
4952 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4954 if (COMPOUND_LITERAL_P (d->cur->value))
4956 tree value = d->cur->value;
4957 if (!same_type_p (TREE_TYPE (value), type))
4959 error ("invalid type %qT as initializer for a vector of type %qT",
4960 TREE_TYPE (d->cur->value), type);
4961 value = error_mark_node;
4967 /* For a vector, we initialize it as an array of the appropriate size. */
4968 if (TREE_CODE (type) == VECTOR_TYPE)
4969 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
4971 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4974 /* Subroutine of reshape_init_r, processes the initializers for classes
4975 or union. Parameters are the same of reshape_init_r. */
4978 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4983 gcc_assert (CLASS_TYPE_P (type));
4985 /* The initializer for a class is always a CONSTRUCTOR. */
4986 new_init = build_constructor (init_list_type_node, NULL);
4987 field = next_initializable_field (TYPE_FIELDS (type));
4993 An initializer for an aggregate member that is an
4994 empty class shall have the form of an empty
4995 initializer-list {}. */
4996 if (!first_initializer_p)
4998 error ("initializer for %qT must be brace-enclosed", type);
4999 return error_mark_node;
5004 /* Loop through the initializable fields, gathering initializers. */
5005 while (d->cur != d->end)
5009 /* Handle designated initializers, as an extension. */
5012 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5014 if (!field || TREE_CODE (field) != FIELD_DECL)
5016 error ("%qT has no non-static data member named %qD", type,
5018 return error_mark_node;
5022 /* If we processed all the member of the class, we are done. */
5026 field_init = reshape_init_r (TREE_TYPE (field), d,
5027 /*first_initializer_p=*/false);
5028 if (field_init == error_mark_node)
5029 return error_mark_node;
5031 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5035 When a union is initialized with a brace-enclosed
5036 initializer, the braces shall only contain an
5037 initializer for the first member of the union. */
5038 if (TREE_CODE (type) == UNION_TYPE)
5041 field = next_initializable_field (DECL_CHAIN (field));
5047 /* Subroutine of reshape_init, which processes a single initializer (part of
5048 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5049 iterator within the CONSTRUCTOR which points to the initializer to process.
5050 FIRST_INITIALIZER_P is true if this is the first initializer of the
5051 outermost CONSTRUCTOR node. */
5054 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
5056 tree init = d->cur->value;
5058 if (error_operand_p (init))
5059 return error_mark_node;
5061 if (TREE_CODE (type) == COMPLEX_TYPE)
5063 /* A complex type can be initialized from one or two initializers,
5064 but braces are not elided. */
5066 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5068 if (CONSTRUCTOR_NELTS (init) > 2)
5069 error ("too many initializers for %qT", type);
5071 else if (first_initializer_p && d->cur != d->end)
5073 VEC(constructor_elt, gc) *v = 0;
5074 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5075 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5077 init = build_constructor (init_list_type_node, v);
5082 /* A non-aggregate type is always initialized with a single
5084 if (!CP_AGGREGATE_TYPE_P (type))
5086 /* It is invalid to initialize a non-aggregate type with a
5087 brace-enclosed initializer before C++0x.
5088 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5089 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5090 a CONSTRUCTOR (with a record type). */
5091 if (TREE_CODE (init) == CONSTRUCTOR
5092 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5094 if (SCALAR_TYPE_P (type))
5096 error ("braces around scalar initializer for type %qT", type);
5097 init = error_mark_node;
5100 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5109 All implicit type conversions (clause _conv_) are considered when
5110 initializing the aggregate member with an initializer from an
5111 initializer-list. If the initializer can initialize a member,
5112 the member is initialized. Otherwise, if the member is itself a
5113 non-empty subaggregate, brace elision is assumed and the
5114 initializer is considered for the initialization of the first
5115 member of the subaggregate. */
5116 if (TREE_CODE (init) != CONSTRUCTOR
5117 /* But don't try this for the first initializer, since that would be
5118 looking through the outermost braces; A a2 = { a1 }; is not a
5119 valid aggregate initialization. */
5120 && !first_initializer_p
5121 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5122 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5128 /* [dcl.init.string]
5130 A char array (whether plain char, signed char, or unsigned char)
5131 can be initialized by a string-literal (optionally enclosed in
5132 braces); a wchar_t array can be initialized by a wide
5133 string-literal (optionally enclosed in braces). */
5134 if (TREE_CODE (type) == ARRAY_TYPE
5135 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5137 tree str_init = init;
5139 /* Strip one level of braces if and only if they enclose a single
5140 element (as allowed by [dcl.init.string]). */
5141 if (!first_initializer_p
5142 && TREE_CODE (str_init) == CONSTRUCTOR
5143 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5145 str_init = VEC_index (constructor_elt,
5146 CONSTRUCTOR_ELTS (str_init), 0)->value;
5149 /* If it's a string literal, then it's the initializer for the array
5150 as a whole. Otherwise, continue with normal initialization for
5151 array types (one value per array element). */
5152 if (TREE_CODE (str_init) == STRING_CST)
5159 /* The following cases are about aggregates. If we are not within a full
5160 initializer already, and there is not a CONSTRUCTOR, it means that there
5161 is a missing set of braces (that is, we are processing the case for
5162 which reshape_init exists). */
5163 if (!first_initializer_p)
5165 if (TREE_CODE (init) == CONSTRUCTOR)
5167 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5168 /* There is no need to reshape pointer-to-member function
5169 initializers, as they are always constructed correctly
5170 by the front end. */
5172 else if (COMPOUND_LITERAL_P (init))
5173 /* For a nested compound literal, there is no need to reshape since
5174 brace elision is not allowed. Even if we decided to allow it,
5175 we should add a call to reshape_init in finish_compound_literal,
5176 before calling digest_init, so changing this code would still
5177 not be necessary. */
5178 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5182 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5183 return reshape_init (type, init);
5187 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5191 /* Dispatch to specialized routines. */
5192 if (CLASS_TYPE_P (type))
5193 return reshape_init_class (type, d, first_initializer_p);
5194 else if (TREE_CODE (type) == ARRAY_TYPE)
5195 return reshape_init_array (type, d);
5196 else if (TREE_CODE (type) == VECTOR_TYPE)
5197 return reshape_init_vector (type, d);
5202 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5203 brace-enclosed aggregate initializer.
5205 INIT is the CONSTRUCTOR containing the list of initializers describing
5206 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5207 It may not presently match the shape of the TYPE; for example:
5209 struct S { int a; int b; };
5210 struct S a[] = { 1, 2, 3, 4 };
5212 Here INIT will hold a VEC of four elements, rather than a
5213 VEC of two elements, each itself a VEC of two elements. This
5214 routine transforms INIT from the former form into the latter. The
5215 revised CONSTRUCTOR node is returned. */
5218 reshape_init (tree type, tree init)
5220 VEC(constructor_elt, gc) *v;
5224 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5226 v = CONSTRUCTOR_ELTS (init);
5228 /* An empty constructor does not need reshaping, and it is always a valid
5230 if (VEC_empty (constructor_elt, v))
5233 /* Recurse on this CONSTRUCTOR. */
5234 d.cur = VEC_index (constructor_elt, v, 0);
5235 d.end = d.cur + VEC_length (constructor_elt, v);
5237 new_init = reshape_init_r (type, &d, true);
5238 if (new_init == error_mark_node)
5239 return error_mark_node;
5241 /* Make sure all the element of the constructor were used. Otherwise,
5242 issue an error about exceeding initializers. */
5244 error ("too many initializers for %qT", type);
5249 /* Verify array initializer. Returns true if errors have been reported. */
5252 check_array_initializer (tree decl, tree type, tree init)
5254 tree element_type = TREE_TYPE (type);
5256 /* The array type itself need not be complete, because the
5257 initializer may tell us how many elements are in the array.
5258 But, the elements of the array must be complete. */
5259 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5262 error ("elements of array %q#D have incomplete type", decl);
5264 error ("elements of array %q#T have incomplete type", type);
5267 /* It is not valid to initialize a VLA. */
5269 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5270 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5273 error ("variable-sized object %qD may not be initialized", decl);
5275 error ("variable-sized compound literal");
5281 /* Subroutine of check_initializer; args are passed down from that function.
5282 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5285 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5288 int saved_stmts_are_full_exprs_p = 0;
5289 if (building_stmt_tree ())
5291 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5292 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5294 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5295 if (building_stmt_tree ())
5296 current_stmt_tree ()->stmts_are_full_exprs_p =
5297 saved_stmts_are_full_exprs_p;
5301 /* Verify INIT (the initializer for DECL), and record the
5302 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5303 grok_reference_init.
5305 If the return value is non-NULL, it is an expression that must be
5306 evaluated dynamically to initialize DECL. */
5309 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5311 tree type = TREE_TYPE (decl);
5312 tree init_code = NULL;
5313 tree extra_init = NULL_TREE;
5316 /* Things that are going to be initialized need to have complete
5318 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5320 if (type == error_mark_node)
5321 /* We will have already complained. */
5324 if (TREE_CODE (type) == ARRAY_TYPE)
5326 if (check_array_initializer (decl, type, init))
5329 else if (!COMPLETE_TYPE_P (type))
5331 error ("%qD has incomplete type", decl);
5332 TREE_TYPE (decl) = error_mark_node;
5336 /* There is no way to make a variable-sized class type in GNU C++. */
5337 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5339 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5341 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5342 if (SCALAR_TYPE_P (type))
5346 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5347 init = build_zero_init (type, NULL_TREE, false);
5349 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5351 error ("scalar object %qD requires one element in initializer",
5353 TREE_TYPE (decl) = error_mark_node;
5359 if (TREE_CODE (decl) == CONST_DECL)
5361 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5363 DECL_INITIAL (decl) = init;
5365 gcc_assert (init != NULL_TREE);
5368 else if (!init && DECL_REALLY_EXTERN (decl))
5370 else if (TREE_CODE (type) == REFERENCE_TYPE)
5371 init = grok_reference_init (decl, type, init, cleanup);
5372 else if (init || TYPE_NEEDS_CONSTRUCTING (type))
5375 check_for_uninitialized_const_var (decl);
5376 /* Do not reshape constructors of vectors (they don't need to be
5378 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5380 if (is_std_init_list (type))
5381 init = build_init_list_var_init (decl, type, init,
5382 &extra_init, cleanup);
5383 else if (TYPE_NON_AGGREGATE_CLASS (type))
5385 /* Don't reshape if the class has constructors. */
5386 if (cxx_dialect == cxx98)
5387 error ("in C++98 %qD must be initialized by constructor, "
5391 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5393 error ("opaque vector types cannot be initialized");
5394 init = error_mark_node;
5397 init = reshape_init (type, init);
5400 /* If DECL has an array type without a specific bound, deduce the
5401 array size from the initializer. */
5402 maybe_deduce_size_from_array_init (decl, init);
5403 type = TREE_TYPE (decl);
5404 if (type == error_mark_node)
5407 if (TYPE_NEEDS_CONSTRUCTING (type)
5408 || (CLASS_TYPE_P (type)
5409 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5411 init_code = build_aggr_init_full_exprs (decl, init, flags);
5413 /* If this is a constexpr initializer, expand_default_init will
5414 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5415 case, pull the initializer back out and pass it down into
5416 store_init_value. */
5417 while (TREE_CODE (init_code) == EXPR_STMT
5418 || TREE_CODE (init_code) == CONVERT_EXPR)
5419 init_code = TREE_OPERAND (init_code, 0);
5420 if (TREE_CODE (init_code) == INIT_EXPR)
5422 init = TREE_OPERAND (init_code, 1);
5423 init_code = NULL_TREE;
5424 /* Don't call digest_init; it's unnecessary and will complain
5425 about aggregate initialization of non-aggregate classes. */
5426 flags |= LOOKUP_ALREADY_DIGESTED;
5428 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5430 /* Declared constexpr, but no suitable initializer; massage
5431 init appropriately so we can pass it into store_init_value
5433 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5434 init = finish_compound_literal (type, init,
5435 tf_warning_or_error);
5436 else if (CLASS_TYPE_P (type)
5437 && (!init || TREE_CODE (init) == TREE_LIST))
5439 init = build_functional_cast (type, init, tf_none);
5440 if (init != error_mark_node)
5441 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5443 init_code = NULL_TREE;
5449 if (init && TREE_CODE (init) != TREE_VEC)
5451 init_code = store_init_value (decl, init, flags);
5452 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5453 && DECL_INITIAL (decl)
5454 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5455 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5456 warning (0, "array %qD initialized by parenthesized string literal %qE",
5457 decl, DECL_INITIAL (decl));
5463 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5464 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5465 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5466 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5469 check_for_uninitialized_const_var (decl);
5472 if (init && init != error_mark_node)
5473 init_code = build2 (INIT_EXPR, type, decl, init);
5476 init_code = add_stmt_to_compound (extra_init, init_code);
5478 if (init_code && DECL_IN_AGGR_P (decl))
5480 static int explained = 0;
5482 if (cxx_dialect < cxx0x)
5483 error ("initializer invalid for static member with constructor");
5485 error ("non-constant in-class initialization invalid for static "
5486 "member %qD", decl);
5489 error ("(an out of class initialization is required)");
5497 /* If DECL is not a local variable, give it RTL. */
5500 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5502 int toplev = toplevel_bindings_p ();
5504 const char *filename;
5506 /* Set the DECL_ASSEMBLER_NAME for the object. */
5509 /* The `register' keyword, when used together with an
5510 asm-specification, indicates that the variable should be
5511 placed in a particular register. */
5512 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5514 set_user_assembler_name (decl, asmspec);
5515 DECL_HARD_REGISTER (decl) = 1;
5519 if (TREE_CODE (decl) == FUNCTION_DECL
5520 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5521 set_builtin_user_assembler_name (decl, asmspec);
5522 set_user_assembler_name (decl, asmspec);
5526 /* Handle non-variables up front. */
5527 if (TREE_CODE (decl) != VAR_DECL)
5529 rest_of_decl_compilation (decl, toplev, at_eof);
5533 /* If we see a class member here, it should be a static data
5535 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5537 gcc_assert (TREE_STATIC (decl));
5538 /* An in-class declaration of a static data member should be
5539 external; it is only a declaration, and not a definition. */
5540 if (init == NULL_TREE)
5541 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5544 /* We don't create any RTL for local variables. */
5545 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5548 /* We defer emission of local statics until the corresponding
5549 DECL_EXPR is expanded. */
5550 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5552 /* We try to defer namespace-scope static constants so that they are
5553 not emitted into the object file unnecessarily. */
5554 filename = input_filename;
5555 if (!DECL_VIRTUAL_P (decl)
5556 && TREE_READONLY (decl)
5557 && DECL_INITIAL (decl) != NULL_TREE
5558 && DECL_INITIAL (decl) != error_mark_node
5560 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5562 && !TREE_PUBLIC (decl))
5564 /* Fool with the linkage of static consts according to #pragma
5566 struct c_fileinfo *finfo = get_fileinfo (filename);
5567 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5569 TREE_PUBLIC (decl) = 1;
5570 DECL_EXTERNAL (decl) = finfo->interface_only;
5575 /* Likewise for template instantiations. */
5576 else if (DECL_LANG_SPECIFIC (decl)
5577 && DECL_IMPLICIT_INSTANTIATION (decl))
5580 /* If we're not deferring, go ahead and assemble the variable. */
5582 rest_of_decl_compilation (decl, toplev, at_eof);
5585 /* walk_tree helper for wrap_temporary_cleanups, below. */
5588 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5590 if (TYPE_P (*stmt_p))
5596 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5598 tree guard = (tree)data;
5599 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5601 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5602 /* Tell honor_protect_cleanup_actions to handle this as a separate
5604 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5606 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5612 /* We're initializing a local variable which has a cleanup GUARD. If there
5613 are any temporaries used in the initializer INIT of this variable, we
5614 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5615 variable will be cleaned up properly if one of them throws.
5617 Unfortunately, there's no way to express this properly in terms of
5618 nesting, as the regions for the temporaries overlap the region for the
5619 variable itself; if there are two temporaries, the variable needs to be
5620 the first thing destroyed if either of them throws. However, we only
5621 want to run the variable's cleanup if it actually got constructed. So
5622 we need to guard the temporary cleanups with the variable's cleanup if
5623 they are run on the normal path, but not if they are run on the
5624 exceptional path. We implement this by telling
5625 honor_protect_cleanup_actions to strip the variable cleanup from the
5626 exceptional path. */
5629 wrap_temporary_cleanups (tree init, tree guard)
5631 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5634 /* Generate code to initialize DECL (a local variable). */
5637 initialize_local_var (tree decl, tree init)
5639 tree type = TREE_TYPE (decl);
5643 gcc_assert (TREE_CODE (decl) == VAR_DECL
5644 || TREE_CODE (decl) == RESULT_DECL);
5645 gcc_assert (!TREE_STATIC (decl));
5647 if (DECL_SIZE (decl) == NULL_TREE)
5649 /* If we used it already as memory, it must stay in memory. */
5650 DECL_INITIAL (decl) = NULL_TREE;
5651 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5655 if (type == error_mark_node)
5658 /* Compute and store the initial value. */
5659 already_used = TREE_USED (decl) || TREE_USED (type);
5660 if (TREE_USED (type))
5661 DECL_READ_P (decl) = 1;
5663 /* Generate a cleanup, if necessary. */
5664 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5666 /* Perform the initialization. */
5669 int saved_stmts_are_full_exprs_p;
5671 /* If we're only initializing a single object, guard the destructors
5672 of any temporaries used in its initializer with its destructor.
5673 This isn't right for arrays because each element initialization is
5674 a full-expression. */
5675 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5676 wrap_temporary_cleanups (init, cleanup);
5678 gcc_assert (building_stmt_tree ());
5679 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5680 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5681 finish_expr_stmt (init);
5682 current_stmt_tree ()->stmts_are_full_exprs_p =
5683 saved_stmts_are_full_exprs_p;
5686 /* Set this to 0 so we can tell whether an aggregate which was
5687 initialized was ever used. Don't do this if it has a
5688 destructor, so we don't complain about the 'resource
5689 allocation is initialization' idiom. Now set
5690 attribute((unused)) on types so decls of that type will be
5691 marked used. (see TREE_USED, above.) */
5692 if (TYPE_NEEDS_CONSTRUCTING (type)
5694 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5695 && DECL_NAME (decl))
5696 TREE_USED (decl) = 0;
5697 else if (already_used)
5698 TREE_USED (decl) = 1;
5701 finish_decl_cleanup (decl, cleanup);
5704 /* DECL is a VAR_DECL for a compiler-generated variable with static
5705 storage duration (like a virtual table) whose initializer is a
5706 compile-time constant. Initialize the variable and provide it to the
5710 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5713 gcc_assert (DECL_ARTIFICIAL (decl));
5714 init = build_constructor (TREE_TYPE (decl), v);
5715 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5716 DECL_INITIAL (decl) = init;
5717 DECL_INITIALIZED_P (decl) = 1;
5718 determine_visibility (decl);
5719 layout_var_decl (decl);
5720 maybe_commonize_var (decl);
5721 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5724 /* INIT is the initializer for a variable, as represented by the
5725 parser. Returns true iff INIT is type-dependent. */
5728 type_dependent_init_p (tree init)
5730 if (TREE_CODE (init) == TREE_LIST)
5731 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5732 return any_type_dependent_elements_p (init);
5733 else if (TREE_CODE (init) == CONSTRUCTOR)
5734 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5736 VEC(constructor_elt, gc) *elts;
5740 elts = CONSTRUCTOR_ELTS (init);
5741 nelts = VEC_length (constructor_elt, elts);
5742 for (i = 0; i < nelts; ++i)
5743 if (type_dependent_init_p (VEC_index (constructor_elt,
5748 /* It must be a simple expression, e.g., int i = 3; */
5749 return type_dependent_expression_p (init);
5754 /* INIT is the initializer for a variable, as represented by the
5755 parser. Returns true iff INIT is value-dependent. */
5758 value_dependent_init_p (tree init)
5760 if (TREE_CODE (init) == TREE_LIST)
5761 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5762 return any_value_dependent_elements_p (init);
5763 else if (TREE_CODE (init) == CONSTRUCTOR)
5764 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5766 VEC(constructor_elt, gc) *elts;
5770 elts = CONSTRUCTOR_ELTS (init);
5771 nelts = VEC_length (constructor_elt, elts);
5772 for (i = 0; i < nelts; ++i)
5773 if (value_dependent_init_p (VEC_index (constructor_elt,
5778 /* It must be a simple expression, e.g., int i = 3; */
5779 return value_dependent_expression_p (init);
5784 /* Finish processing of a declaration;
5785 install its line number and initial value.
5786 If the length of an array type is not known before,
5787 it must be determined now, from the initial value, or it is an error.
5789 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5790 true, then INIT is an integral constant expression.
5792 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5793 if the (init) syntax was used. */
5796 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5797 tree asmspec_tree, int flags)
5801 const char *asmspec = NULL;
5802 int was_readonly = 0;
5803 bool var_definition_p = false;
5806 if (decl == error_mark_node)
5811 error ("assignment (not initialization) in declaration");
5815 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5816 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5817 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5819 type = TREE_TYPE (decl);
5820 if (type == error_mark_node)
5823 /* Assume no cleanup is required. */
5824 cleanup = NULL_TREE;
5826 /* If a name was specified, get the string. */
5827 if (global_scope_p (current_binding_level))
5828 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5829 if (asmspec_tree && asmspec_tree != error_mark_node)
5830 asmspec = TREE_STRING_POINTER (asmspec_tree);
5832 if (current_class_type
5833 && CP_DECL_CONTEXT (decl) == current_class_type
5834 && TYPE_BEING_DEFINED (current_class_type)
5835 && (DECL_INITIAL (decl) || init))
5836 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5838 auto_node = type_uses_auto (type);
5842 if (init == NULL_TREE)
5844 error ("declaration of %q#D has no initializer", decl);
5845 TREE_TYPE (decl) = error_mark_node;
5849 if (TREE_CODE (d_init) == TREE_LIST)
5850 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5851 tf_warning_or_error);
5852 d_init = resolve_nondeduced_context (d_init);
5853 if (describable_type (d_init))
5855 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5857 if (type == error_mark_node)
5862 if (TREE_CODE (decl) == FUNCTION_DECL
5863 /* For members, defer until finalize_literal_type_property. */
5864 && (!DECL_CLASS_SCOPE_P (decl)
5865 || !TYPE_BEING_DEFINED (DECL_CONTEXT (decl))))
5866 validate_constexpr_fundecl (decl);
5868 else if (!ensure_literal_type_for_constexpr_object (decl))
5869 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5871 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5874 if (init == ridpointers[(int)RID_DELETE])
5876 /* FIXME check this is 1st decl. */
5877 DECL_DELETED_FN (decl) = 1;
5878 DECL_DECLARED_INLINE_P (decl) = 1;
5879 DECL_INITIAL (decl) = error_mark_node;
5880 FOR_EACH_CLONE (clone, decl)
5882 DECL_DELETED_FN (clone) = 1;
5883 DECL_DECLARED_INLINE_P (clone) = 1;
5884 DECL_INITIAL (clone) = error_mark_node;
5888 else if (init == ridpointers[(int)RID_DEFAULT])
5890 if (defaultable_fn_check (decl))
5891 DECL_DEFAULTED_FN (decl) = 1;
5893 DECL_INITIAL (decl) = NULL_TREE;
5897 if (init && TREE_CODE (decl) == VAR_DECL)
5899 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5900 if (init_const_expr_p)
5902 /* Set these flags now for templates. We'll update the flags in
5903 store_init_value for instantiations. */
5904 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5905 if (decl_maybe_constant_var_p (decl))
5906 TREE_CONSTANT (decl) = 1;
5910 if (processing_template_decl)
5912 bool type_dependent_p;
5914 /* Add this declaration to the statement-tree. */
5915 if (at_function_scope_p ())
5916 add_decl_expr (decl);
5918 type_dependent_p = dependent_type_p (type);
5920 if (check_for_bare_parameter_packs (init))
5923 DECL_INITIAL (decl) = NULL_TREE;
5926 /* Generally, initializers in templates are expanded when the
5927 template is instantiated. But, if DECL is a variable constant
5928 then it can be used in future constant expressions, so its value
5929 must be available. */
5931 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
5932 /* We can't do anything if the decl has dependent type. */;
5934 && init_const_expr_p
5935 && !type_dependent_p
5936 && decl_maybe_constant_var_p (decl)
5937 && !type_dependent_init_p (init)
5938 && !value_dependent_init_p (init))
5940 /* This variable seems to be a non-dependent constant, so process
5941 its initializer. If check_initializer returns non-null the
5942 initialization wasn't constant after all. */
5943 tree init_code = check_initializer (decl, init, flags, &cleanup);
5944 if (init_code == NULL_TREE)
5947 else if (!DECL_PRETTY_FUNCTION_P (decl))
5948 /* Deduce array size even if the initializer is dependent. */
5949 maybe_deduce_size_from_array_init (decl, init);
5952 DECL_INITIAL (decl) = init;
5956 /* Take care of TYPE_DECLs up front. */
5957 if (TREE_CODE (decl) == TYPE_DECL)
5959 if (type != error_mark_node
5960 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5962 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5963 warning (0, "shadowing previous type declaration of %q#D", decl);
5964 set_identifier_type_value (DECL_NAME (decl), decl);
5967 /* If we have installed this as the canonical typedef for this
5968 type, and that type has not been defined yet, delay emitting
5969 the debug information for it, as we will emit it later. */
5970 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5971 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5972 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5974 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
5979 /* A reference will be modified here, as it is initialized. */
5980 if (! DECL_EXTERNAL (decl)
5981 && TREE_READONLY (decl)
5982 && TREE_CODE (type) == REFERENCE_TYPE)
5985 TREE_READONLY (decl) = 0;
5988 if (TREE_CODE (decl) == VAR_DECL)
5990 /* Only variables with trivial initialization and destruction can
5991 have thread-local storage. */
5992 if (DECL_THREAD_LOCAL_P (decl)
5993 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5994 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5995 error ("%qD cannot be thread-local because it has non-trivial "
5996 "type %qT", decl, TREE_TYPE (decl));
5997 /* If this is a local variable that will need a mangled name,
5998 register it now. We must do this before processing the
5999 initializer for the variable, since the initialization might
6000 require a guard variable, and since the mangled name of the
6001 guard variable will depend on the mangled name of this
6003 if (DECL_FUNCTION_SCOPE_P (decl)
6004 && TREE_STATIC (decl)
6005 && !DECL_ARTIFICIAL (decl))
6007 push_local_name (decl);
6008 if (DECL_CONSTRUCTOR_P (current_function_decl)
6009 || DECL_DESTRUCTOR_P (current_function_decl))
6010 /* Normally local_decls is populated during GIMPLE lowering,
6011 but [cd]tors are never actually compiled directly. We need
6012 to put statics on the list so we can deal with the label
6013 address extension. */
6014 add_local_decl (cfun, decl);
6017 /* Convert the initializer to the type of DECL, if we have not
6018 already initialized DECL. */
6019 if (!DECL_INITIALIZED_P (decl)
6020 /* If !DECL_EXTERNAL then DECL is being defined. In the
6021 case of a static data member initialized inside the
6022 class-specifier, there can be an initializer even if DECL
6023 is *not* defined. */
6024 && (!DECL_EXTERNAL (decl) || init))
6026 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6029 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6030 /* Allow libjava/prims.cc define primitive classes. */
6031 if (init != NULL_TREE
6032 || jclass == NULL_TREE
6033 || TREE_CODE (jclass) != TYPE_DECL
6034 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6035 || !same_type_ignoring_top_level_qualifiers_p
6036 (type, TREE_TYPE (TREE_TYPE (jclass))))
6037 error ("Java object %qD not allocated with %<new%>", decl);
6040 init = check_initializer (decl, init, flags, &cleanup);
6041 /* Thread-local storage cannot be dynamically initialized. */
6042 if (DECL_THREAD_LOCAL_P (decl) && init)
6044 error ("%qD is thread-local and so cannot be dynamically "
6045 "initialized", decl);
6049 /* Check that the initializer for a static data member was a
6050 constant. Although we check in the parser that the
6051 initializer is an integral constant expression, we do not
6052 simplify division-by-zero at the point at which it
6053 occurs. Therefore, in:
6055 struct S { static const int i = 7 / 0; };
6057 we issue an error at this point. It would
6058 probably be better to forbid division by zero in
6059 integral constant expressions. */
6060 if (DECL_EXTERNAL (decl) && init)
6062 error ("%qD cannot be initialized by a non-constant expression"
6063 " when being declared", decl);
6064 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6072 The memory occupied by any object of static storage
6073 duration is zero-initialized at program startup before
6074 any other initialization takes place.
6076 We cannot create an appropriate initializer until after
6077 the type of DECL is finalized. If DECL_INITIAL is set,
6078 then the DECL is statically initialized, and any
6079 necessary zero-initialization has already been performed. */
6080 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6081 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6082 /*nelts=*/NULL_TREE,
6083 /*static_storage_p=*/true);
6084 /* Remember that the initialization for this variable has
6086 DECL_INITIALIZED_P (decl) = 1;
6087 /* This declaration is the definition of this variable,
6088 unless we are initializing a static data member within
6089 the class specifier. */
6090 if (!DECL_EXTERNAL (decl))
6091 var_definition_p = true;
6093 /* If the variable has an array type, lay out the type, even if
6094 there is no initializer. It is valid to index through the
6095 array, and we must get TYPE_ALIGN set correctly on the array
6097 else if (TREE_CODE (type) == ARRAY_TYPE)
6100 if (TREE_STATIC (decl)
6101 && !at_function_scope_p ()
6102 && current_function_decl == NULL)
6103 /* So decl is a global variable or a static member of a
6104 non local class. Record the types it uses
6105 so that we can decide later to emit debug info for them. */
6106 record_types_used_by_current_var_decl (decl);
6108 else if (TREE_CODE (decl) == FIELD_DECL
6109 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6110 error ("non-static data member %qD has Java class type", decl);
6112 /* Add this declaration to the statement-tree. This needs to happen
6113 after the call to check_initializer so that the DECL_EXPR for a
6114 reference temp is added before the DECL_EXPR for the reference itself. */
6115 if (at_function_scope_p ())
6116 add_decl_expr (decl);
6118 /* Let the middle end know about variables and functions -- but not
6119 static data members in uninstantiated class templates. */
6120 if (TREE_CODE (decl) == VAR_DECL
6121 || TREE_CODE (decl) == FUNCTION_DECL)
6123 if (TREE_CODE (decl) == VAR_DECL)
6125 layout_var_decl (decl);
6126 maybe_commonize_var (decl);
6129 /* This needs to happen after the linkage is set. */
6130 determine_visibility (decl);
6132 if (var_definition_p && TREE_STATIC (decl))
6134 /* If a TREE_READONLY variable needs initialization
6135 at runtime, it is no longer readonly and we need to
6136 avoid MEM_READONLY_P being set on RTL created for it. */
6139 if (TREE_READONLY (decl))
6140 TREE_READONLY (decl) = 0;
6143 else if (was_readonly)
6144 TREE_READONLY (decl) = 1;
6147 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6149 /* Check for abstractness of the type. Notice that there is no
6150 need to strip array types here since the check for those types
6151 is already done within create_array_type_for_decl. */
6152 if (TREE_CODE (type) == FUNCTION_TYPE
6153 || TREE_CODE (type) == METHOD_TYPE)
6154 abstract_virtuals_error (decl, TREE_TYPE (type));
6156 abstract_virtuals_error (decl, type);
6158 if (TREE_TYPE (decl) == error_mark_node)
6159 /* No initialization required. */
6161 else if (TREE_CODE (decl) == FUNCTION_DECL)
6165 if (init == ridpointers[(int)RID_DEFAULT])
6167 /* An out-of-class default definition is defined at
6168 the point where it is explicitly defaulted. */
6169 if (DECL_DELETED_FN (decl))
6170 maybe_explain_implicit_delete (decl);
6171 else if (DECL_INITIAL (decl) == error_mark_node)
6172 synthesize_method (decl);
6175 error ("function %q#D is initialized like a variable", decl);
6177 /* else no initialization required. */
6179 else if (DECL_EXTERNAL (decl)
6180 && ! (DECL_LANG_SPECIFIC (decl)
6181 && DECL_NOT_REALLY_EXTERN (decl)))
6184 DECL_INITIAL (decl) = init;
6186 /* A variable definition. */
6187 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6188 /* Initialize the local variable. */
6189 initialize_local_var (decl, init);
6191 /* If a variable is defined, and then a subsequent
6192 definition with external linkage is encountered, we will
6193 get here twice for the same variable. We want to avoid
6194 calling expand_static_init more than once. For variables
6195 that are not static data members, we can call
6196 expand_static_init only when we actually process the
6197 initializer. It is not legal to redeclare a static data
6198 member, so this issue does not arise in that case. */
6199 else if (var_definition_p && TREE_STATIC (decl))
6200 expand_static_init (decl, init);
6203 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6204 reference, insert it in the statement-tree now. */
6206 push_cleanup (decl, cleanup, false);
6209 TREE_READONLY (decl) = 1;
6212 /* Returns a declaration for a VAR_DECL as if:
6214 extern "C" TYPE NAME;
6216 had been seen. Used to create compiler-generated global
6220 declare_global_var (tree name, tree type)
6224 push_to_top_level ();
6225 decl = build_decl (input_location, VAR_DECL, name, type);
6226 TREE_PUBLIC (decl) = 1;
6227 DECL_EXTERNAL (decl) = 1;
6228 DECL_ARTIFICIAL (decl) = 1;
6229 /* If the user has explicitly declared this variable (perhaps
6230 because the code we are compiling is part of a low-level runtime
6231 library), then it is possible that our declaration will be merged
6232 with theirs by pushdecl. */
6233 decl = pushdecl (decl);
6234 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6235 pop_from_top_level ();
6240 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6241 if "__cxa_atexit" is not being used) corresponding to the function
6242 to be called when the program exits. */
6245 get_atexit_fn_ptr_type (void)
6249 if (!atexit_fn_ptr_type_node)
6252 if (flag_use_cxa_atexit
6253 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6254 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6255 arg_type = ptr_type_node;
6257 /* The parameter to "atexit" is "void (*)(void)". */
6258 arg_type = NULL_TREE;
6260 fn_type = build_function_type_list (void_type_node,
6261 arg_type, NULL_TREE);
6262 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6265 return atexit_fn_ptr_type_node;
6268 /* Returns a pointer to the `atexit' function. Note that if
6269 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6270 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6273 get_atexit_node (void)
6279 bool use_aeabi_atexit;
6284 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6286 /* The declaration for `__cxa_atexit' is:
6288 int __cxa_atexit (void (*)(void *), void *, void *)
6290 We build up the argument types and then the function type
6292 tree argtype0, argtype1, argtype2;
6294 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6295 /* First, build the pointer-to-function type for the first
6297 fn_ptr_type = get_atexit_fn_ptr_type ();
6298 /* Then, build the rest of the argument types. */
6299 argtype2 = ptr_type_node;
6300 if (use_aeabi_atexit)
6302 argtype1 = fn_ptr_type;
6303 argtype0 = ptr_type_node;
6307 argtype1 = ptr_type_node;
6308 argtype0 = fn_ptr_type;
6310 /* And the final __cxa_atexit type. */
6311 fn_type = build_function_type_list (integer_type_node,
6312 argtype0, argtype1, argtype2,
6314 fn_ptr_type = build_pointer_type (fn_type);
6315 if (use_aeabi_atexit)
6316 name = "__aeabi_atexit";
6318 name = "__cxa_atexit";
6322 /* The declaration for `atexit' is:
6324 int atexit (void (*)());
6326 We build up the argument types and then the function type
6328 fn_ptr_type = get_atexit_fn_ptr_type ();
6329 /* Build the final atexit type. */
6330 fn_type = build_function_type_list (integer_type_node,
6331 fn_ptr_type, NULL_TREE);
6335 /* Now, build the function declaration. */
6336 push_lang_context (lang_name_c);
6337 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6338 mark_used (atexit_fndecl);
6339 pop_lang_context ();
6340 atexit_node = decay_conversion (atexit_fndecl);
6345 /* Returns the __dso_handle VAR_DECL. */
6348 get_dso_handle_node (void)
6350 if (dso_handle_node)
6351 return dso_handle_node;
6353 /* Declare the variable. */
6354 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6357 return dso_handle_node;
6360 /* Begin a new function with internal linkage whose job will be simply
6361 to destroy some particular variable. */
6363 static GTY(()) int start_cleanup_cnt;
6366 start_cleanup_fn (void)
6371 bool use_cxa_atexit = flag_use_cxa_atexit
6372 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6374 push_to_top_level ();
6376 /* No need to mangle this. */
6377 push_lang_context (lang_name_c);
6379 /* Build the name of the function. */
6380 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6381 /* Build the function declaration. */
6382 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6383 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6384 /* It's a function with internal linkage, generated by the
6386 TREE_PUBLIC (fndecl) = 0;
6387 DECL_ARTIFICIAL (fndecl) = 1;
6388 /* Make the function `inline' so that it is only emitted if it is
6389 actually needed. It is unlikely that it will be inlined, since
6390 it is only called via a function pointer, but we avoid unnecessary
6391 emissions this way. */
6392 DECL_DECLARED_INLINE_P (fndecl) = 1;
6393 DECL_INTERFACE_KNOWN (fndecl) = 1;
6394 /* Build the parameter. */
6399 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6400 DECL_CONTEXT (parmdecl) = fndecl;
6401 TREE_USED (parmdecl) = 1;
6402 DECL_READ_P (parmdecl) = 1;
6403 DECL_ARGUMENTS (fndecl) = parmdecl;
6407 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6409 pop_lang_context ();
6411 return current_function_decl;
6414 /* Finish the cleanup function begun by start_cleanup_fn. */
6417 end_cleanup_fn (void)
6419 expand_or_defer_fn (finish_function (0));
6421 pop_from_top_level ();
6424 /* Generate code to handle the destruction of DECL, an object with
6425 static storage duration. */
6428 register_dtor_fn (tree decl)
6435 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6437 type = TREE_TYPE (decl);
6438 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6439 return void_zero_node;
6441 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6442 a class object, we can just pass the destructor to
6443 "__cxa_atexit"; we don't have to build a temporary function to do
6445 use_dtor = (flag_use_cxa_atexit
6446 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6447 && CLASS_TYPE_P (type));
6452 /* Find the destructor. */
6453 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6454 gcc_assert (idx >= 0);
6455 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6456 /* Make sure it is accessible. */
6457 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6461 /* Call build_cleanup before we enter the anonymous function so
6462 that any access checks will be done relative to the current
6463 scope, rather than the scope of the anonymous function. */
6464 build_cleanup (decl);
6466 /* Now start the function. */
6467 cleanup = start_cleanup_fn ();
6469 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6470 to the original function, rather than the anonymous one. That
6471 will make the back end think that nested functions are in use,
6472 which causes confusion. */
6473 push_deferring_access_checks (dk_no_check);
6474 fcall = build_cleanup (decl);
6475 pop_deferring_access_checks ();
6477 /* Create the body of the anonymous function. */
6478 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6479 finish_expr_stmt (fcall);
6480 finish_compound_stmt (compound_stmt);
6484 /* Call atexit with the cleanup function. */
6485 mark_used (cleanup);
6486 cleanup = build_address (cleanup);
6487 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6493 /* We must convert CLEANUP to the type that "__cxa_atexit"
6495 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6496 /* "__cxa_atexit" will pass the address of DECL to the
6497 cleanup function. */
6499 addr = build_address (decl);
6500 /* The declared type of the parameter to "__cxa_atexit" is
6501 "void *". For plain "T*", we could just let the
6502 machinery in cp_build_function_call convert it -- but if the
6503 type is "cv-qualified T *", then we need to convert it
6504 before passing it in, to avoid spurious errors. */
6505 addr = build_nop (ptr_type_node, addr);
6508 /* Since the cleanup functions we build ignore the address
6509 they're given, there's no reason to pass the actual address
6510 in, and, in general, it's cheaper to pass NULL than any
6512 addr = null_pointer_node;
6513 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6514 tf_warning_or_error);
6515 if (targetm.cxx.use_aeabi_atexit ())
6528 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6529 arg0, arg1, arg2, NULL_TREE);
6532 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6533 is its initializer. Generate code to handle the construction
6534 and destruction of DECL. */
6537 expand_static_init (tree decl, tree init)
6539 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6540 gcc_assert (TREE_STATIC (decl));
6542 /* Some variables require no dynamic initialization. */
6544 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6547 if (DECL_FUNCTION_SCOPE_P (decl))
6549 /* Emit code to perform this initialization but once. */
6550 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6551 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6552 tree guard, guard_addr;
6553 tree acquire_fn, release_fn, abort_fn;
6556 /* Emit code to perform this initialization but once. This code
6559 static <type> guard;
6560 if (!guard.first_byte) {
6561 if (__cxa_guard_acquire (&guard)) {
6564 // Do initialization.
6565 flag = true; __cxa_guard_release (&guard);
6566 // Register variable for destruction at end of program.
6568 if (!flag) __cxa_guard_abort (&guard);
6572 Note that the `flag' variable is only set to 1 *after* the
6573 initialization is complete. This ensures that an exception,
6574 thrown during the construction, will cause the variable to
6575 reinitialized when we pass through this code again, as per:
6579 If the initialization exits by throwing an exception, the
6580 initialization is not complete, so it will be tried again
6581 the next time control enters the declaration.
6583 This process should be thread-safe, too; multiple threads
6584 should not be able to initialize the variable more than
6587 /* Create the guard variable. */
6588 guard = get_guard (decl);
6590 /* This optimization isn't safe on targets with relaxed memory
6591 consistency. On such targets we force synchronization in
6592 __cxa_guard_acquire. */
6593 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6595 /* Begin the conditional initialization. */
6596 if_stmt = begin_if_stmt ();
6597 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6598 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6601 if (flag_threadsafe_statics)
6603 guard_addr = build_address (guard);
6605 acquire_fn = get_identifier ("__cxa_guard_acquire");
6606 release_fn = get_identifier ("__cxa_guard_release");
6607 abort_fn = get_identifier ("__cxa_guard_abort");
6608 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6610 tree vfntype = build_function_type_list (void_type_node,
6611 TREE_TYPE (guard_addr),
6613 acquire_fn = push_library_fn
6614 (acquire_fn, build_function_type_list (integer_type_node,
6615 TREE_TYPE (guard_addr),
6618 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6619 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6623 release_fn = identifier_global_value (release_fn);
6624 abort_fn = identifier_global_value (abort_fn);
6627 inner_if_stmt = begin_if_stmt ();
6628 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6631 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6632 begin = get_target_expr (boolean_false_node);
6633 flag = TARGET_EXPR_SLOT (begin);
6635 TARGET_EXPR_CLEANUP (begin)
6636 = build3 (COND_EXPR, void_type_node, flag,
6638 build_call_n (abort_fn, 1, guard_addr));
6639 CLEANUP_EH_ONLY (begin) = 1;
6641 /* Do the initialization itself. */
6642 init = add_stmt_to_compound (begin, init);
6643 init = add_stmt_to_compound
6644 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6645 init = add_stmt_to_compound
6646 (init, build_call_n (release_fn, 1, guard_addr));
6649 init = add_stmt_to_compound (init, set_guard (guard));
6651 /* Use atexit to register a function for destroying this static
6653 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6655 finish_expr_stmt (init);
6657 if (flag_threadsafe_statics)
6659 finish_compound_stmt (inner_then_clause);
6660 finish_then_clause (inner_if_stmt);
6661 finish_if_stmt (inner_if_stmt);
6664 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6666 finish_compound_stmt (then_clause);
6667 finish_then_clause (if_stmt);
6668 finish_if_stmt (if_stmt);
6672 static_aggregates = tree_cons (init, decl, static_aggregates);
6676 /* Make TYPE a complete type based on INITIAL_VALUE.
6677 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6678 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6679 3 if the initializer list is empty (in pedantic mode). */
6682 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6685 tree type, elt_type;
6689 unsigned HOST_WIDE_INT i;
6692 /* An array of character type can be initialized from a
6693 brace-enclosed string constant.
6695 FIXME: this code is duplicated from reshape_init. Probably
6696 we should just call reshape_init here? */
6697 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6698 && TREE_CODE (initial_value) == CONSTRUCTOR
6699 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6701 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6702 tree value = VEC_index (constructor_elt, v, 0)->value;
6704 if (TREE_CODE (value) == STRING_CST
6705 && VEC_length (constructor_elt, v) == 1)
6706 initial_value = value;
6709 /* If any of the elements are parameter packs, we can't actually
6710 complete this type now because the array size is dependent. */
6711 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6713 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6716 if (PACK_EXPANSION_P (value))
6722 failure = complete_array_type (ptype, initial_value, do_default);
6724 /* We can create the array before the element type is complete, which
6725 means that we didn't have these two bits set in the original type
6726 either. In completing the type, we are expected to propagate these
6727 bits. See also complete_type which does the same thing for arrays
6730 if (TYPE_DOMAIN (type))
6732 elt_type = TREE_TYPE (type);
6733 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6734 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6735 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6741 /* As above, but either give an error or reject zero-size arrays, depending
6745 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6746 bool do_default, tsubst_flags_t complain)
6749 bool sfinae = !(complain & tf_error);
6750 /* In SFINAE context we can't be lenient about zero-size arrays. */
6753 failure = cp_complete_array_type (ptype, initial_value, do_default);
6759 /* Not an error. */;
6760 else if (failure == 1)
6761 error ("initializer fails to determine size of %qT", *ptype);
6762 else if (failure == 2)
6765 error ("array size missing in %qT", *ptype);
6767 else if (failure == 3)
6768 error ("zero-size array %qT", *ptype);
6769 *ptype = error_mark_node;
6774 /* Return zero if something is declared to be a member of type
6775 CTYPE when in the context of CUR_TYPE. STRING is the error
6776 message to print in that case. Otherwise, quietly return 1. */
6779 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6781 if (ctype && ctype != cur_type)
6783 if (flags == DTOR_FLAG)
6784 error ("destructor for alien class %qT cannot be a member", ctype);
6786 error ("constructor for alien class %qT cannot be a member", ctype);
6792 /* Subroutine of `grokdeclarator'. */
6794 /* Generate errors possibly applicable for a given set of specifiers.
6795 This is for ARM $7.1.2. */
6798 bad_specifiers (tree object,
6799 enum bad_spec_place type,
6810 error ("%qD declared as a %<virtual%> variable", object);
6812 error ("%qD declared as an %<inline%> variable", object);
6814 error ("%<const%> and %<volatile%> function specifiers on "
6815 "%qD invalid in variable declaration", object);
6819 error ("%qD declared as a %<virtual%> parameter", object);
6821 error ("%qD declared as an %<inline%> parameter", object);
6823 error ("%<const%> and %<volatile%> function specifiers on "
6824 "%qD invalid in parameter declaration", object);
6828 error ("%qD declared as a %<virtual%> type", object);
6830 error ("%qD declared as an %<inline%> type", object);
6832 error ("%<const%> and %<volatile%> function specifiers on "
6833 "%qD invalid in type declaration", object);
6837 error ("%qD declared as a %<virtual%> field", object);
6839 error ("%qD declared as an %<inline%> field", object);
6841 error ("%<const%> and %<volatile%> function specifiers on "
6842 "%qD invalid in field declaration", object);
6848 error ("%q+D declared as a friend", object);
6850 && (TREE_CODE (object) == TYPE_DECL
6851 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6852 && !TYPE_REFFN_P (TREE_TYPE (object))
6853 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6854 error ("%q+D declared with an exception specification", object);
6857 /* DECL is a member function or static data member and is presently
6858 being defined. Check that the definition is taking place in a
6862 check_class_member_definition_namespace (tree decl)
6864 /* These checks only apply to member functions and static data
6866 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6867 || TREE_CODE (decl) == VAR_DECL);
6868 /* We check for problems with specializations in pt.c in
6869 check_specialization_namespace, where we can issue better
6871 if (processing_specialization)
6873 /* There are no restrictions on the placement of
6874 explicit instantiations. */
6875 if (processing_explicit_instantiation)
6879 A member function definition that appears outside of the
6880 class definition shall appear in a namespace scope enclosing
6881 the class definition.
6885 The definition for a static data member shall appear in a
6886 namespace scope enclosing the member's class definition. */
6887 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6888 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6889 decl, DECL_CONTEXT (decl));
6892 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6893 METHOD_TYPE for a non-static member function; QUALS are the
6894 cv-qualifiers that apply to the function. */
6897 build_this_parm (tree type, cp_cv_quals quals)
6902 cp_cv_quals this_quals;
6904 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6905 /* The `this' parameter is implicitly `const'; it cannot be
6907 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6908 qual_type = cp_build_qualified_type (this_type, this_quals);
6909 parm = build_artificial_parm (this_identifier, qual_type);
6910 cp_apply_type_quals_to_decl (this_quals, parm);
6914 /* CTYPE is class type, or null if non-class.
6915 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6917 DECLARATOR is the function's name.
6918 PARMS is a chain of PARM_DECLs for the function.
6919 VIRTUALP is truthvalue of whether the function is virtual or not.
6920 FLAGS are to be passed through to `grokclassfn'.
6921 QUALS are qualifiers indicating whether the function is `const'
6923 RAISES is a list of exceptions that this function can raise.
6924 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6925 not look, and -1 if we should not call `grokclassfn' at all.
6927 SFK is the kind of special function (if any) for the new function.
6929 Returns `NULL_TREE' if something goes wrong, after issuing
6930 applicable error messages. */
6933 grokfndecl (tree ctype,
6937 tree orig_declarator,
6939 enum overload_flags flags,
6946 special_function_kind sfk,
6951 location_t location)
6954 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6958 type = build_exception_variant (type, raises);
6960 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6962 /* If we have an explicit location, use it, otherwise use whatever
6963 build_lang_decl used (probably input_location). */
6964 if (location != UNKNOWN_LOCATION)
6965 DECL_SOURCE_LOCATION (decl) = location;
6967 if (TREE_CODE (type) == METHOD_TYPE)
6970 parm = build_this_parm (type, quals);
6971 DECL_CHAIN (parm) = parms;
6974 DECL_ARGUMENTS (decl) = parms;
6975 for (t = parms; t; t = DECL_CHAIN (t))
6976 DECL_CONTEXT (t) = decl;
6977 /* Propagate volatile out from type to decl. */
6978 if (TYPE_VOLATILE (type))
6979 TREE_THIS_VOLATILE (decl) = 1;
6981 /* Setup decl according to sfk. */
6984 case sfk_constructor:
6985 case sfk_copy_constructor:
6986 case sfk_move_constructor:
6987 DECL_CONSTRUCTOR_P (decl) = 1;
6989 case sfk_destructor:
6990 DECL_DESTRUCTOR_P (decl) = 1;
6996 /* If pointers to member functions use the least significant bit to
6997 indicate whether a function is virtual, ensure a pointer
6998 to this function will have that bit clear. */
6999 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7000 && TREE_CODE (type) == METHOD_TYPE
7001 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7002 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7005 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7009 ("defining explicit specialization %qD in friend declaration",
7013 tree fns = TREE_OPERAND (orig_declarator, 0);
7014 tree args = TREE_OPERAND (orig_declarator, 1);
7016 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7018 /* Something like `template <class T> friend void f<T>()'. */
7019 error ("invalid use of template-id %qD in declaration "
7020 "of primary template",
7026 /* A friend declaration of the form friend void f<>(). Record
7027 the information in the TEMPLATE_ID_EXPR. */
7028 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7030 if (TREE_CODE (fns) == COMPONENT_REF)
7032 /* Due to bison parser ickiness, we will have already looked
7033 up an operator_name or PFUNCNAME within the current class
7034 (see template_id in parse.y). If the current class contains
7035 such a name, we'll get a COMPONENT_REF here. Undo that. */
7037 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7038 == current_class_type);
7039 fns = TREE_OPERAND (fns, 1);
7041 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7042 || TREE_CODE (fns) == OVERLOAD);
7043 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7045 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7046 if (TREE_PURPOSE (t)
7047 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7049 error ("default arguments are not allowed in declaration "
7050 "of friend template specialization %qD",
7057 error ("%<inline%> is not allowed in declaration of friend "
7058 "template specialization %qD",
7065 /* If this decl has namespace scope, set that up. */
7067 set_decl_namespace (decl, in_namespace, friendp);
7069 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7071 /* `main' and builtins have implicit 'C' linkage. */
7072 if ((MAIN_NAME_P (declarator)
7073 || (IDENTIFIER_LENGTH (declarator) > 10
7074 && IDENTIFIER_POINTER (declarator)[0] == '_'
7075 && IDENTIFIER_POINTER (declarator)[1] == '_'
7076 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7077 && current_lang_name == lang_name_cplusplus
7078 && ctype == NULL_TREE
7079 && DECL_FILE_SCOPE_P (decl))
7080 SET_DECL_LANGUAGE (decl, lang_c);
7082 /* Should probably propagate const out from type to decl I bet (mrs). */
7085 DECL_STATIC_FUNCTION_P (decl) = 1;
7086 DECL_CONTEXT (decl) = ctype;
7091 DECL_CONTEXT (decl) = ctype;
7093 check_class_member_definition_namespace (decl);
7096 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7098 if (processing_template_decl)
7099 error ("cannot declare %<::main%> to be a template");
7101 error ("cannot declare %<::main%> to be inline");
7103 error ("cannot declare %<::main%> to be static");
7108 /* Members of anonymous types and local classes have no linkage; make
7109 them internal. If a typedef is made later, this will be changed. */
7110 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7111 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7114 if (publicp && cxx_dialect == cxx98)
7116 /* [basic.link]: A name with no linkage (notably, the name of a class
7117 or enumeration declared in a local scope) shall not be used to
7118 declare an entity with linkage.
7120 DR 757 relaxes this restriction for C++0x. */
7121 t = no_linkage_check (TREE_TYPE (decl),
7122 /*relaxed_p=*/false);
7125 if (TYPE_ANONYMOUS_P (t))
7127 if (DECL_EXTERN_C_P (decl))
7128 /* Allow this; it's pretty common in C. */;
7131 permerror (input_location, "anonymous type with no linkage "
7132 "used to declare function %q#D with linkage",
7134 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7135 permerror (input_location, "%q+#D does not refer to the unqualified "
7136 "type, so it is not used for linkage",
7141 permerror (input_location, "type %qT with no linkage used to "
7142 "declare function %q#D with linkage", t, decl);
7146 TREE_PUBLIC (decl) = publicp;
7149 DECL_INTERFACE_KNOWN (decl) = 1;
7150 DECL_NOT_REALLY_EXTERN (decl) = 1;
7153 /* If the declaration was declared inline, mark it as such. */
7155 DECL_DECLARED_INLINE_P (decl) = 1;
7157 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7159 DECL_EXTERNAL (decl) = 1;
7160 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7163 ? G_("static member function %qD cannot have cv-qualifier")
7164 : G_("non-member function %qD cannot have cv-qualifier"),
7166 quals = TYPE_UNQUALIFIED;
7169 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7170 && !grok_op_properties (decl, /*complain=*/true))
7174 /* Make the init_value nonzero so pushdecl knows this is not
7175 tentative. error_mark_node is replaced later with the BLOCK. */
7176 DECL_INITIAL (decl) = error_mark_node;
7178 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7179 TREE_NOTHROW (decl) = 1;
7181 /* Caller will do the rest of this. */
7185 if (ctype != NULL_TREE)
7186 grokclassfn (ctype, decl, flags);
7188 decl = check_explicit_specialization (orig_declarator, decl,
7191 4 * (friendp != 0));
7192 if (decl == error_mark_node)
7197 cplus_decl_attributes (&decl, *attrlist, 0);
7198 *attrlist = NULL_TREE;
7201 /* Check main's type after attributes have been applied. */
7202 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7204 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7207 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7209 error ("%<::main%> must return %<int%>");
7210 newtype = build_function_type (integer_type_node, oldtypeargs);
7211 TREE_TYPE (decl) = newtype;
7214 check_main_parameter_types (decl);
7217 if (ctype != NULL_TREE
7218 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7221 tree old_decl = check_classfn (ctype, decl,
7222 (processing_template_decl
7223 > template_class_depth (ctype))
7224 ? current_template_parms
7227 if (old_decl == error_mark_node)
7235 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7236 /* Because grokfndecl is always supposed to return a
7237 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7238 here. We depend on our callers to figure out that its
7239 really a template that's being returned. */
7240 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7242 if (DECL_STATIC_FUNCTION_P (old_decl)
7243 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7244 /* Remove the `this' parm added by grokclassfn.
7245 XXX Isn't this done in start_function, too? */
7246 revert_static_member_fn (decl);
7247 if (DECL_ARTIFICIAL (old_decl))
7249 error ("definition of implicitly-declared %qD", old_decl);
7253 /* Since we've smashed OLD_DECL to its
7254 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7255 if (TREE_CODE (decl) == TEMPLATE_DECL)
7256 decl = DECL_TEMPLATE_RESULT (decl);
7258 /* Attempt to merge the declarations. This can fail, in
7259 the case of some invalid specialization declarations. */
7260 pushed_scope = push_scope (ctype);
7261 ok = duplicate_decls (decl, old_decl, friendp);
7263 pop_scope (pushed_scope);
7266 error ("no %q#D member function declared in class %qT",
7274 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7277 if (ctype == NULL_TREE || check)
7281 DECL_VIRTUAL_P (decl) = 1;
7286 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7287 the linkage that DECL will receive in the object file. */
7290 set_linkage_for_static_data_member (tree decl)
7292 /* A static data member always has static storage duration and
7293 external linkage. Note that static data members are forbidden in
7294 local classes -- the only situation in which a class has
7295 non-external linkage. */
7296 TREE_PUBLIC (decl) = 1;
7297 TREE_STATIC (decl) = 1;
7298 /* For non-template classes, static data members are always put
7299 out in exactly those files where they are defined, just as
7300 with ordinary namespace-scope variables. */
7301 if (!processing_template_decl)
7302 DECL_INTERFACE_KNOWN (decl) = 1;
7305 /* Create a VAR_DECL named NAME with the indicated TYPE.
7307 If SCOPE is non-NULL, it is the class type or namespace containing
7308 the variable. If SCOPE is NULL, the variable should is created in
7309 the innermost enclosings scope. */
7312 grokvardecl (tree type,
7314 const cp_decl_specifier_seq *declspecs,
7320 tree explicit_scope;
7322 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7324 /* Compute the scope in which to place the variable, but remember
7325 whether or not that scope was explicitly specified by the user. */
7326 explicit_scope = scope;
7329 /* An explicit "extern" specifier indicates a namespace-scope
7331 if (declspecs->storage_class == sc_extern)
7332 scope = current_decl_namespace ();
7333 else if (!at_function_scope_p ())
7334 scope = current_scope ();
7338 && (/* If the variable is a namespace-scope variable declared in a
7339 template, we need DECL_LANG_SPECIFIC. */
7340 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7341 /* Similarly for namespace-scope variables with language linkage
7343 || (TREE_CODE (scope) == NAMESPACE_DECL
7344 && current_lang_name != lang_name_cplusplus)
7345 /* Similarly for static data members. */
7347 decl = build_lang_decl (VAR_DECL, name, type);
7349 decl = build_decl (input_location, VAR_DECL, name, type);
7351 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7352 set_decl_namespace (decl, explicit_scope, 0);
7354 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7356 if (declspecs->storage_class == sc_extern)
7358 DECL_THIS_EXTERN (decl) = 1;
7359 DECL_EXTERNAL (decl) = !initialized;
7362 if (DECL_CLASS_SCOPE_P (decl))
7364 set_linkage_for_static_data_member (decl);
7365 /* This function is only called with out-of-class definitions. */
7366 DECL_EXTERNAL (decl) = 0;
7367 check_class_member_definition_namespace (decl);
7369 /* At top level, either `static' or no s.c. makes a definition
7370 (perhaps tentative), and absence of `static' makes it public. */
7371 else if (toplevel_bindings_p ())
7373 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7374 && (DECL_THIS_EXTERN (decl) || ! constp));
7375 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7377 /* Not at top level, only `static' makes a static definition. */
7380 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7381 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7384 if (declspecs->specs[(int)ds_thread])
7385 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7387 /* If the type of the decl has no linkage, make sure that we'll
7388 notice that in mark_used. */
7389 if (cxx_dialect > cxx98
7390 && decl_linkage (decl) != lk_none
7391 && DECL_LANG_SPECIFIC (decl) == NULL
7392 && !DECL_EXTERN_C_P (decl)
7393 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7394 retrofit_lang_decl (decl);
7396 if (TREE_PUBLIC (decl))
7398 /* [basic.link]: A name with no linkage (notably, the name of a class
7399 or enumeration declared in a local scope) shall not be used to
7400 declare an entity with linkage.
7402 DR 757 relaxes this restriction for C++0x. */
7403 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7404 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7407 if (TYPE_ANONYMOUS_P (t))
7409 if (DECL_EXTERN_C_P (decl))
7410 /* Allow this; it's pretty common in C. */
7414 /* DRs 132, 319 and 389 seem to indicate types with
7415 no linkage can only be used to declare extern "C"
7416 entities. Since it's not always an error in the
7417 ISO C++ 90 Standard, we only issue a warning. */
7418 warning (0, "anonymous type with no linkage used to declare "
7419 "variable %q#D with linkage", decl);
7420 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7421 warning (0, "%q+#D does not refer to the unqualified "
7422 "type, so it is not used for linkage",
7427 warning (0, "type %qT with no linkage used to declare variable "
7428 "%q#D with linkage", t, decl);
7432 DECL_INTERFACE_KNOWN (decl) = 1;
7437 /* Create and return a canonical pointer to member function type, for
7438 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7441 build_ptrmemfunc_type (tree type)
7445 tree unqualified_variant = NULL_TREE;
7447 if (type == error_mark_node)
7450 /* If a canonical type already exists for this type, use it. We use
7451 this method instead of type_hash_canon, because it only does a
7452 simple equality check on the list of field members. */
7454 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7457 /* Make sure that we always have the unqualified pointer-to-member
7459 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7461 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7463 t = make_class_type (RECORD_TYPE);
7464 xref_basetypes (t, NULL_TREE);
7466 /* Let the front end know this is a pointer to member function... */
7467 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7468 /* ... and not really a class type. */
7469 SET_CLASS_TYPE_P (t, 0);
7471 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7474 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7476 DECL_CHAIN (field) = fields;
7479 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7481 /* Zap out the name so that the back end will give us the debugging
7482 information for this anonymous RECORD_TYPE. */
7483 TYPE_NAME (t) = NULL_TREE;
7485 /* If this is not the unqualified form of this pointer-to-member
7486 type, set the TYPE_MAIN_VARIANT for this type to be the
7487 unqualified type. Since they are actually RECORD_TYPEs that are
7488 not variants of each other, we must do this manually.
7489 As we just built a new type there is no need to do yet another copy. */
7490 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7492 int type_quals = cp_type_quals (type);
7493 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7494 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7495 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7496 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7497 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7498 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7499 TREE_TYPE (TYPE_BINFO (t)) = t;
7502 /* Cache this pointer-to-member type so that we can find it again
7504 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7506 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7507 SET_TYPE_STRUCTURAL_EQUALITY (t);
7508 else if (TYPE_CANONICAL (type) != type)
7509 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7514 /* Create and return a pointer to data member type. */
7517 build_ptrmem_type (tree class_type, tree member_type)
7519 if (TREE_CODE (member_type) == METHOD_TYPE)
7521 cp_cv_quals quals = type_memfn_quals (member_type);
7522 member_type = build_memfn_type (member_type, class_type, quals);
7523 return build_ptrmemfunc_type (build_pointer_type (member_type));
7527 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7528 return build_offset_type (class_type, member_type);
7532 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7533 Check to see that the definition is valid. Issue appropriate error
7534 messages. Return 1 if the definition is particularly bad, or 0
7538 check_static_variable_definition (tree decl, tree type)
7540 /* If DECL is declared constexpr, we'll do the appropriate checks
7541 in check_initializer. */
7542 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7544 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7546 if (literal_type_p (type))
7547 error ("%<constexpr%> needed for in-class initialization of static "
7548 "data member %q#D of non-integral type", decl);
7550 error ("in-class initialization of static data member %q#D of "
7551 "non-literal type", decl);
7555 /* Motion 10 at San Diego: If a static const integral data member is
7556 initialized with an integral constant expression, the initializer
7557 may appear either in the declaration (within the class), or in
7558 the definition, but not both. If it appears in the class, the
7559 member is a member constant. The file-scope definition is always
7561 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7563 error ("invalid in-class initialization of static data member "
7564 "of non-integral type %qT",
7568 else if (!CP_TYPE_CONST_P (type))
7569 error ("ISO C++ forbids in-class initialization of non-const "
7570 "static member %qD",
7572 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7573 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7574 "%qD of non-integral type %qT", decl, type);
7579 /* Given the SIZE (i.e., number of elements) in an array, compute an
7580 appropriate index type for the array. If non-NULL, NAME is the
7581 name of the thing being declared. */
7584 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7589 tree abi_1_itype = NULL_TREE;
7591 if (error_operand_p (size))
7592 return error_mark_node;
7594 type = TREE_TYPE (size);
7595 /* type_dependent_expression_p? */
7596 if (!dependent_type_p (type))
7598 mark_rvalue_use (size);
7600 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7601 && TREE_SIDE_EFFECTS (size))
7602 /* In C++98, we mark a non-constant array bound with a magic
7603 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7606 size = fold_non_dependent_expr (size);
7608 if (CLASS_TYPE_P (type)
7609 && CLASSTYPE_LITERAL_P (type))
7611 size = build_expr_type_conversion (WANT_INT, size, true);
7614 if (!(complain & tf_error))
7615 return error_mark_node;
7617 error ("size of array %qD has non-integral type %qT",
7620 error ("size of array has non-integral type %qT", type);
7621 size = integer_one_node;
7623 if (size == error_mark_node)
7624 return error_mark_node;
7625 type = TREE_TYPE (size);
7626 /* We didn't support this case in GCC 3.2, so don't bother
7627 trying to model it now in ABI v1. */
7628 abi_1_itype = error_mark_node;
7631 size = maybe_constant_value (size);
7632 if (!TREE_CONSTANT (size))
7636 if (error_operand_p (size))
7637 return error_mark_node;
7639 /* The array bound must be an integer type. */
7640 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7642 if (!(complain & tf_error))
7643 return error_mark_node;
7645 error ("size of array %qD has non-integral type %qT", name, type);
7647 error ("size of array has non-integral type %qT", type);
7648 size = integer_one_node;
7649 type = TREE_TYPE (size);
7653 /* A type is dependent if it is...an array type constructed from any
7654 dependent type or whose size is specified by a constant expression
7655 that is value-dependent. */
7656 /* We can only call value_dependent_expression_p on integral constant
7657 expressions; treat non-constant expressions as dependent, too. */
7658 if (processing_template_decl
7659 && (dependent_type_p (type)
7660 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7662 /* We cannot do any checking for a SIZE that isn't known to be
7663 constant. Just build the index type and mark that it requires
7664 structural equality checks. */
7665 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7666 size, integer_one_node));
7667 TYPE_DEPENDENT_P (itype) = 1;
7668 TYPE_DEPENDENT_P_VALID (itype) = 1;
7669 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7673 if (!abi_version_at_least (2) && processing_template_decl
7674 && abi_1_itype == NULL_TREE)
7675 /* For abi-1, we handled all instances in templates the same way,
7676 even when they were non-dependent. This affects the manglings
7677 produced. So, we do the normal checking for non-dependent
7678 sizes, but at the end we'll return the same type that abi-1
7679 would have, but with TYPE_CANONICAL set to the "right"
7680 value that the current ABI would provide. */
7681 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7682 osize, integer_one_node));
7684 /* Normally, the array-bound will be a constant. */
7685 if (TREE_CODE (size) == INTEGER_CST)
7687 /* Check to see if the array bound overflowed. Make that an
7688 error, no matter how generous we're being. */
7689 constant_expression_error (size);
7691 /* An array must have a positive number of elements. */
7692 if (INT_CST_LT (size, integer_zero_node))
7694 if (!(complain & tf_error))
7695 return error_mark_node;
7697 error ("size of array %qD is negative", name);
7699 error ("size of array is negative");
7700 size = integer_one_node;
7702 /* As an extension we allow zero-sized arrays. */
7703 else if (integer_zerop (size))
7705 if (!(complain & tf_error))
7706 /* We must fail if performing argument deduction (as
7707 indicated by the state of complain), so that
7708 another substitution can be found. */
7709 return error_mark_node;
7710 else if (in_system_header)
7711 /* Allow them in system headers because glibc uses them. */;
7713 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7715 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7718 else if (TREE_CONSTANT (size)
7719 /* We don't allow VLAs at non-function scopes, or during
7720 tentative template substitution. */
7721 || !at_function_scope_p () || !(complain & tf_error))
7723 if (!(complain & tf_error))
7724 return error_mark_node;
7725 /* `(int) &fn' is not a valid array bound. */
7727 error ("size of array %qD is not an integral constant-expression",
7730 error ("size of array is not an integral constant-expression");
7731 size = integer_one_node;
7733 else if (pedantic && warn_vla != 0)
7736 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7738 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7740 else if (warn_vla > 0)
7744 "variable length array %qD is used", name);
7747 "variable length array is used");
7750 if (processing_template_decl && !TREE_CONSTANT (size))
7751 /* A variable sized array. */
7752 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7755 HOST_WIDE_INT saved_processing_template_decl;
7757 /* Compute the index of the largest element in the array. It is
7758 one less than the number of elements in the array. We save
7759 and restore PROCESSING_TEMPLATE_DECL so that computations in
7760 cp_build_binary_op will be appropriately folded. */
7761 saved_processing_template_decl = processing_template_decl;
7762 processing_template_decl = 0;
7763 itype = cp_build_binary_op (input_location,
7765 cp_convert (ssizetype, size),
7766 cp_convert (ssizetype, integer_one_node),
7767 tf_warning_or_error);
7768 itype = fold (itype);
7769 processing_template_decl = saved_processing_template_decl;
7771 if (!TREE_CONSTANT (itype))
7773 /* A variable sized array. */
7774 if (TREE_SIDE_EFFECTS (itype))
7775 /* Use get_temp_regvar rather than variable_size here so that
7776 people walking expressions that use a variable of this type
7777 don't walk into this expression. */
7778 itype = get_temp_regvar (TREE_TYPE (itype), itype);
7780 itype = variable_size (itype);
7782 /* Make sure that there was no overflow when creating to a signed
7783 index type. (For example, on a 32-bit machine, an array with
7784 size 2^32 - 1 is too big.) */
7785 else if (TREE_CODE (itype) == INTEGER_CST
7786 && TREE_OVERFLOW (itype))
7788 if (!(complain & tf_error))
7789 return error_mark_node;
7790 error ("overflow in array dimension");
7791 TREE_OVERFLOW (itype) = 0;
7795 /* Create and return the appropriate index type. */
7796 if (abi_1_itype && abi_1_itype != error_mark_node)
7798 tree t = build_index_type (itype);
7799 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7800 itype = abi_1_itype;
7803 itype = build_index_type (itype);
7805 /* If the index type were dependent, we would have returned early, so
7806 remember that it isn't. */
7807 TYPE_DEPENDENT_P (itype) = 0;
7808 TYPE_DEPENDENT_P_VALID (itype) = 1;
7812 /* Returns the scope (if any) in which the entity declared by
7813 DECLARATOR will be located. If the entity was declared with an
7814 unqualified name, NULL_TREE is returned. */
7817 get_scope_of_declarator (const cp_declarator *declarator)
7819 while (declarator && declarator->kind != cdk_id)
7820 declarator = declarator->declarator;
7822 /* If the declarator-id is a SCOPE_REF, the scope in which the
7823 declaration occurs is the first operand. */
7825 && declarator->u.id.qualifying_scope)
7826 return declarator->u.id.qualifying_scope;
7828 /* Otherwise, the declarator is not a qualified name; the entity will
7829 be declared in the current scope. */
7833 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7834 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7838 create_array_type_for_decl (tree name, tree type, tree size)
7840 tree itype = NULL_TREE;
7842 /* If things have already gone awry, bail now. */
7843 if (type == error_mark_node || size == error_mark_node)
7844 return error_mark_node;
7846 /* If there are some types which cannot be array elements,
7847 issue an error-message and return. */
7848 switch (TREE_CODE (type))
7852 error ("declaration of %qD as array of void", name);
7854 error ("creating array of void");
7855 return error_mark_node;
7859 error ("declaration of %qD as array of functions", name);
7861 error ("creating array of functions");
7862 return error_mark_node;
7864 case REFERENCE_TYPE:
7866 error ("declaration of %qD as array of references", name);
7868 error ("creating array of references");
7869 return error_mark_node;
7873 error ("declaration of %qD as array of function members", name);
7875 error ("creating array of function members");
7876 return error_mark_node;
7884 The constant expressions that specify the bounds of the arrays
7885 can be omitted only for the first member of the sequence. */
7886 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7889 error ("declaration of %qD as multidimensional array must "
7890 "have bounds for all dimensions except the first",
7893 error ("multidimensional array must have bounds for all "
7894 "dimensions except the first");
7896 return error_mark_node;
7899 /* Figure out the index type for the array. */
7901 itype = compute_array_index_type (name, size, tf_warning_or_error);
7904 T is called the array element type; this type shall not be [...] an
7905 abstract class type. */
7906 abstract_virtuals_error (name, type);
7908 return build_cplus_array_type (type, itype);
7911 /* Check that it's OK to declare a function with the indicated TYPE.
7912 SFK indicates the kind of special function (if any) that this
7913 function is. OPTYPE is the type given in a conversion operator
7914 declaration, or the class type for a constructor/destructor.
7915 Returns the actual return type of the function; that
7916 may be different than TYPE if an error occurs, or for certain
7917 special functions. */
7920 check_special_function_return_type (special_function_kind sfk,
7926 case sfk_constructor:
7928 error ("return type specification for constructor invalid");
7930 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7931 type = build_pointer_type (optype);
7933 type = void_type_node;
7936 case sfk_destructor:
7938 error ("return type specification for destructor invalid");
7939 /* We can't use the proper return type here because we run into
7940 problems with ambiguous bases and covariant returns.
7941 Java classes are left unchanged because (void *) isn't a valid
7942 Java type, and we don't want to change the Java ABI. */
7943 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7944 type = build_pointer_type (void_type_node);
7946 type = void_type_node;
7949 case sfk_conversion:
7951 error ("return type specified for %<operator %T%>", optype);
7962 /* A variable or data member (whose unqualified name is IDENTIFIER)
7963 has been declared with the indicated TYPE. If the TYPE is not
7964 acceptable, issue an error message and return a type to use for
7965 error-recovery purposes. */
7968 check_var_type (tree identifier, tree type)
7970 if (VOID_TYPE_P (type))
7973 error ("unnamed variable or field declared void");
7974 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7976 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7977 error ("variable or field %qE declared void", identifier);
7980 error ("variable or field declared void");
7981 type = error_mark_node;
7987 /* Given declspecs and a declarator (abstract or otherwise), determine
7988 the name and type of the object declared and construct a DECL node
7991 DECLSPECS points to the representation of declaration-specifier
7992 sequence that precedes declarator.
7994 DECL_CONTEXT says which syntactic context this declaration is in:
7995 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7996 FUNCDEF for a function definition. Like NORMAL but a few different
7997 error messages in each case. Return value may be zero meaning
7998 this definition is too screwy to try to parse.
7999 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8000 handle member functions (which have FIELD context).
8001 Return value may be zero meaning this definition is too screwy to
8003 PARM for a parameter declaration (either within a function prototype
8004 or before a function body). Make a PARM_DECL, or return void_type_node.
8005 TPARM for a template parameter declaration.
8006 CATCHPARM for a parameter declaration before a catch clause.
8007 TYPENAME if for a typename (in a cast or sizeof).
8008 Don't make a DECL node; just return the ..._TYPE node.
8009 FIELD for a struct or union field; make a FIELD_DECL.
8010 BITFIELD for a field with specified width.
8012 INITIALIZED is as for start_decl.
8014 ATTRLIST is a pointer to the list of attributes, which may be NULL
8015 if there are none; *ATTRLIST may be modified if attributes from inside
8016 the declarator should be applied to the declaration.
8018 When this function is called, scoping variables (such as
8019 CURRENT_CLASS_TYPE) should reflect the scope in which the
8020 declaration occurs, not the scope in which the new declaration will
8021 be placed. For example, on:
8025 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8028 Returns a DECL (if a declarator is present), a TYPE (if there is no
8029 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8033 grokdeclarator (const cp_declarator *declarator,
8034 const cp_decl_specifier_seq *declspecs,
8035 enum decl_context decl_context,
8039 tree type = NULL_TREE;
8041 int explicit_int128 = 0;
8042 int virtualp, explicitp, friendp, inlinep, staticp;
8043 int explicit_int = 0;
8044 int explicit_char = 0;
8045 int defaulted_int = 0;
8046 tree dependent_name = NULL_TREE;
8048 tree typedef_decl = NULL_TREE;
8049 const char *name = NULL;
8050 tree typedef_type = NULL_TREE;
8051 /* True if this declarator is a function definition. */
8052 bool funcdef_flag = false;
8053 cp_declarator_kind innermost_code = cdk_error;
8056 /* See the code below that used this. */
8057 tree decl_attr = NULL_TREE;
8060 /* Keep track of what sort of function is being processed
8061 so that we can warn about default return values, or explicit
8062 return values which do not match prescribed defaults. */
8063 special_function_kind sfk = sfk_none;
8065 tree dname = NULL_TREE;
8066 tree ctor_return_type = NULL_TREE;
8067 enum overload_flags flags = NO_SPECIAL;
8068 /* cv-qualifiers that apply to the declarator, for a declaration of
8069 a member function. */
8070 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8071 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8073 tree raises = NULL_TREE;
8074 int template_count = 0;
8075 tree returned_attrs = NULL_TREE;
8076 tree parms = NULL_TREE;
8077 const cp_declarator *id_declarator;
8078 /* The unqualified name of the declarator; either an
8079 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8080 tree unqualified_id;
8081 /* The class type, if any, in which this entity is located,
8082 or NULL_TREE if none. Note that this value may be different from
8083 the current class type; for example if an attempt is made to declare
8084 "A::f" inside "B", this value will be "A". */
8085 tree ctype = current_class_type;
8086 /* The NAMESPACE_DECL for the namespace in which this entity is
8087 located. If an unqualified name is used to declare the entity,
8088 this value will be NULL_TREE, even if the entity is located at
8090 tree in_namespace = NULL_TREE;
8091 cp_storage_class storage_class;
8092 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8093 bool type_was_error_mark_node = false;
8094 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8095 bool template_type_arg = false;
8096 bool template_parm_flag = false;
8097 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8100 signed_p = declspecs->specs[(int)ds_signed];
8101 unsigned_p = declspecs->specs[(int)ds_unsigned];
8102 short_p = declspecs->specs[(int)ds_short];
8103 long_p = declspecs->specs[(int)ds_long];
8104 longlong = declspecs->specs[(int)ds_long] >= 2;
8105 explicit_int128 = declspecs->explicit_int128_p;
8106 thread_p = declspecs->specs[(int)ds_thread];
8108 if (decl_context == FUNCDEF)
8109 funcdef_flag = true, decl_context = NORMAL;
8110 else if (decl_context == MEMFUNCDEF)
8111 funcdef_flag = true, decl_context = FIELD;
8112 else if (decl_context == BITFIELD)
8113 bitfield = 1, decl_context = FIELD;
8114 else if (decl_context == TEMPLATE_TYPE_ARG)
8115 template_type_arg = true, decl_context = TYPENAME;
8116 else if (decl_context == TPARM)
8117 template_parm_flag = true, decl_context = PARM;
8119 if (initialized > 1)
8120 funcdef_flag = true;
8122 /* Look inside a declarator for the name being declared
8123 and get it as a string, for an error message. */
8124 for (id_declarator = declarator;
8126 id_declarator = id_declarator->declarator)
8128 if (id_declarator->kind != cdk_id)
8129 innermost_code = id_declarator->kind;
8131 switch (id_declarator->kind)
8134 if (id_declarator->declarator
8135 && id_declarator->declarator->kind == cdk_id)
8137 sfk = id_declarator->declarator->u.id.sfk;
8138 if (sfk == sfk_destructor)
8145 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8146 tree decl = id_declarator->u.id.unqualified_name;
8149 if (qualifying_scope)
8151 if (at_function_scope_p ())
8155 A declarator-id shall not be qualified except
8158 None of the cases are permitted in block
8160 if (qualifying_scope == global_namespace)
8161 error ("invalid use of qualified-name %<::%D%>",
8163 else if (TYPE_P (qualifying_scope))
8164 error ("invalid use of qualified-name %<%T::%D%>",
8165 qualifying_scope, decl);
8167 error ("invalid use of qualified-name %<%D::%D%>",
8168 qualifying_scope, decl);
8169 return error_mark_node;
8171 else if (TYPE_P (qualifying_scope))
8173 ctype = qualifying_scope;
8174 if (innermost_code != cdk_function
8175 && current_class_type
8176 && !UNIQUELY_DERIVED_FROM_P (ctype,
8177 current_class_type))
8179 error ("type %qT is not derived from type %qT",
8180 ctype, current_class_type);
8181 return error_mark_node;
8184 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8185 in_namespace = qualifying_scope;
8187 switch (TREE_CODE (decl))
8193 if (innermost_code != cdk_function)
8195 error ("declaration of %qD as non-function", decl);
8196 return error_mark_node;
8198 else if (!qualifying_scope
8199 && !(current_class_type && at_class_scope_p ()))
8201 error ("declaration of %qD as non-member", decl);
8202 return error_mark_node;
8205 type = TREE_OPERAND (decl, 0);
8207 type = constructor_name (type);
8208 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8213 case TEMPLATE_ID_EXPR:
8215 tree fns = TREE_OPERAND (decl, 0);
8218 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8220 gcc_assert (is_overloaded_fn (dname));
8221 dname = DECL_NAME (get_first_fn (dname));
8226 case IDENTIFIER_NODE:
8227 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8230 if (C_IS_RESERVED_WORD (dname))
8232 error ("declarator-id missing; using reserved word %qD",
8234 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8236 else if (!IDENTIFIER_TYPENAME_P (dname))
8237 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8240 gcc_assert (flags == NO_SPECIAL);
8241 flags = TYPENAME_FLAG;
8242 ctor_return_type = TREE_TYPE (dname);
8243 sfk = sfk_conversion;
8244 if (is_typename_at_global_scope (dname))
8245 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8247 name = "<invalid operator>";
8264 return error_mark_node;
8269 if (id_declarator->kind == cdk_id)
8275 The declarator in a function-definition shall have the form
8276 D1 ( parameter-declaration-clause) ... */
8277 if (funcdef_flag && innermost_code != cdk_function)
8279 error ("function definition does not declare parameters");
8280 return error_mark_node;
8283 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8284 && innermost_code != cdk_function
8285 && ! (ctype && !declspecs->any_specifiers_p))
8287 error ("declaration of %qD as non-function", dname);
8288 return error_mark_node;
8291 /* Anything declared one level down from the top level
8292 must be one of the parameters of a function
8293 (because the body is at least two levels down). */
8295 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8296 by not allowing C++ class definitions to specify their parameters
8297 with xdecls (must be spec.d in the parmlist).
8299 Since we now wait to push a class scope until we are sure that
8300 we are in a legitimate method context, we must set oldcname
8301 explicitly (since current_class_name is not yet alive).
8303 We also want to avoid calling this a PARM if it is in a namespace. */
8305 if (decl_context == NORMAL && !toplevel_bindings_p ())
8307 struct cp_binding_level *b = current_binding_level;
8308 current_binding_level = b->level_chain;
8309 if (current_binding_level != 0 && toplevel_bindings_p ())
8310 decl_context = PARM;
8311 current_binding_level = b;
8315 name = decl_context == PARM ? "parameter" : "type name";
8317 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8319 error ("%<constexpr%> cannot appear in a typedef declaration");
8320 return error_mark_node;
8323 /* If there were multiple types specified in the decl-specifier-seq,
8324 issue an error message. */
8325 if (declspecs->multiple_types_p)
8327 error ("two or more data types in declaration of %qs", name);
8328 return error_mark_node;
8331 if (declspecs->conflicting_specifiers_p)
8333 error ("conflicting specifiers in declaration of %qs", name);
8334 return error_mark_node;
8337 /* Extract the basic type from the decl-specifier-seq. */
8338 type = declspecs->type;
8339 if (type == error_mark_node)
8342 type_was_error_mark_node = true;
8344 /* If the entire declaration is itself tagged as deprecated then
8345 suppress reports of deprecated items. */
8346 if (type && TREE_DEPRECATED (type)
8347 && deprecated_state != DEPRECATED_SUPPRESS)
8348 warn_deprecated_use (type, NULL_TREE);
8349 if (type && TREE_CODE (type) == TYPE_DECL)
8351 typedef_decl = type;
8352 type = TREE_TYPE (typedef_decl);
8353 if (TREE_DEPRECATED (type)
8354 && DECL_ARTIFICIAL (typedef_decl)
8355 && deprecated_state != DEPRECATED_SUPPRESS)
8356 warn_deprecated_use (type, NULL_TREE);
8358 /* No type at all: default to `int', and set DEFAULTED_INT
8359 because it was not a user-defined typedef. */
8360 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8362 /* These imply 'int'. */
8363 type = integer_type_node;
8367 explicit_int = declspecs->explicit_int_p;
8368 explicit_char = declspecs->explicit_char_p;
8371 /* See the code below that used this. */
8373 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8375 typedef_type = type;
8378 if (sfk != sfk_conversion)
8379 ctor_return_type = ctype;
8381 if (sfk != sfk_none)
8382 type = check_special_function_return_type (sfk, type,
8384 else if (type == NULL_TREE)
8390 /* We handle `main' specially here, because 'main () { }' is so
8391 common. With no options, it is allowed. With -Wreturn-type,
8392 it is a warning. It is only an error with -pedantic-errors. */
8393 is_main = (funcdef_flag
8394 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8395 && MAIN_NAME_P (dname)
8396 && ctype == NULL_TREE
8397 && in_namespace == NULL_TREE
8398 && current_namespace == global_namespace);
8400 if (type_was_error_mark_node)
8401 /* We've already issued an error, don't complain more. */;
8402 else if (in_system_header || flag_ms_extensions)
8403 /* Allow it, sigh. */;
8405 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8407 pedwarn (input_location, OPT_pedantic,
8408 "ISO C++ forbids declaration of %qs with no type", name);
8410 warning (OPT_Wreturn_type,
8411 "ISO C++ forbids declaration of %qs with no type", name);
8413 type = integer_type_node;
8418 /* Now process the modifiers that were specified
8419 and check for invalid combinations. */
8421 /* Long double is a special combination. */
8422 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8425 type = cp_build_qualified_type (long_double_type_node,
8426 cp_type_quals (type));
8429 /* Check all other uses of type modifiers. */
8431 if (unsigned_p || signed_p || long_p || short_p)
8435 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8436 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8437 else if (signed_p && unsigned_p)
8438 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8439 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8440 error ("%<long long%> invalid for %qs", name);
8441 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8442 error ("%<__int128%> invalid for %qs", name);
8443 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8444 error ("%<long%> invalid for %qs", name);
8445 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8446 error ("%<short%> invalid for %qs", name);
8447 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8448 error ("%<long%> or %<short%> invalid for %qs", name);
8449 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8450 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8451 else if ((long_p || short_p) && explicit_char)
8452 error ("%<long%> or %<short%> specified with char for %qs", name);
8453 else if (long_p && short_p)
8454 error ("%<long%> and %<short%> specified together for %qs", name);
8455 else if (type == char16_type_node || type == char32_type_node)
8457 if (signed_p || unsigned_p)
8458 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8459 else if (short_p || long_p)
8460 error ("%<short%> or %<long%> invalid for %qs", name);
8465 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8467 pedwarn (input_location, OPT_pedantic,
8468 "long, short, signed or unsigned used invalidly for %qs",
8470 if (flag_pedantic_errors)
8473 if (explicit_int128)
8475 if (int128_integer_type_node == NULL_TREE)
8477 error ("%<__int128%> is not supported by this target");
8482 pedwarn (input_location, OPT_pedantic,
8483 "ISO C++ does not support %<__int128%> for %qs",
8485 if (flag_pedantic_errors)
8491 /* Discard the type modifiers if they are invalid. */
8499 explicit_int128 = false;
8503 /* Decide whether an integer type is signed or not.
8504 Optionally treat bitfields as signed by default. */
8508 It is implementation-defined whether a plain (neither
8509 explicitly signed or unsigned) char, short, int, or long
8510 bit-field is signed or unsigned.
8512 Naturally, we extend this to long long as well. Note that
8513 this does not include wchar_t. */
8514 || (bitfield && !flag_signed_bitfields
8516 /* A typedef for plain `int' without `signed' can be
8517 controlled just like plain `int', but a typedef for
8518 `signed int' cannot be so controlled. */
8520 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8521 && TREE_CODE (type) == INTEGER_TYPE
8522 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8524 if (explicit_int128)
8525 type = int128_unsigned_type_node;
8527 type = long_long_unsigned_type_node;
8529 type = long_unsigned_type_node;
8531 type = short_unsigned_type_node;
8532 else if (type == char_type_node)
8533 type = unsigned_char_type_node;
8534 else if (typedef_decl)
8535 type = unsigned_type_for (type);
8537 type = unsigned_type_node;
8539 else if (signed_p && type == char_type_node)
8540 type = signed_char_type_node;
8541 else if (explicit_int128)
8542 type = int128_integer_type_node;
8544 type = long_long_integer_type_node;
8546 type = long_integer_type_node;
8548 type = short_integer_type_node;
8550 if (declspecs->specs[(int)ds_complex])
8552 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8553 error ("complex invalid for %qs", name);
8554 /* If we just have "complex", it is equivalent to
8555 "complex double", but if any modifiers at all are specified it is
8556 the complex form of TYPE. E.g, "complex short" is
8557 "complex short int". */
8558 else if (defaulted_int && ! longlong && ! explicit_int128
8559 && ! (long_p || short_p || signed_p || unsigned_p))
8560 type = complex_double_type_node;
8561 else if (type == integer_type_node)
8562 type = complex_integer_type_node;
8563 else if (type == float_type_node)
8564 type = complex_float_type_node;
8565 else if (type == double_type_node)
8566 type = complex_double_type_node;
8567 else if (type == long_double_type_node)
8568 type = complex_long_double_type_node;
8570 type = build_complex_type (type);
8573 type_quals = TYPE_UNQUALIFIED;
8574 if (declspecs->specs[(int)ds_const])
8575 type_quals |= TYPE_QUAL_CONST;
8576 if (declspecs->specs[(int)ds_volatile])
8577 type_quals |= TYPE_QUAL_VOLATILE;
8578 if (declspecs->specs[(int)ds_restrict])
8579 type_quals |= TYPE_QUAL_RESTRICT;
8580 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8581 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8584 type_quals |= cp_type_quals (type);
8585 type = cp_build_qualified_type_real
8586 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8587 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8588 /* We might have ignored or rejected some of the qualifiers. */
8589 type_quals = cp_type_quals (type);
8592 inlinep = !! declspecs->specs[(int)ds_inline];
8593 virtualp = !! declspecs->specs[(int)ds_virtual];
8594 explicitp = !! declspecs->specs[(int)ds_explicit];
8596 storage_class = declspecs->storage_class;
8597 if (storage_class == sc_static)
8598 staticp = 1 + (decl_context == FIELD);
8600 if (virtualp && staticp == 2)
8602 error ("member %qD cannot be declared both virtual and static", dname);
8603 storage_class = sc_none;
8606 friendp = !! declspecs->specs[(int)ds_friend];
8608 if (dependent_name && !friendp)
8610 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8611 return error_mark_node;
8614 /* Issue errors about use of storage classes for parameters. */
8615 if (decl_context == PARM)
8617 if (declspecs->specs[(int)ds_typedef])
8619 error ("typedef declaration invalid in parameter declaration");
8620 return error_mark_node;
8622 else if (template_parm_flag && storage_class != sc_none)
8624 error ("storage class specified for template parameter %qs", name);
8625 return error_mark_node;
8627 else if (storage_class == sc_static
8628 || storage_class == sc_extern
8630 error ("storage class specifiers invalid in parameter declarations");
8632 if (type_uses_auto (type))
8634 error ("parameter declared %<auto%>");
8635 type = error_mark_node;
8638 /* Function parameters cannot be constexpr. If we saw one, moan
8639 and pretend it wasn't there. */
8642 error ("a parameter cannot be declared %<constexpr%>");
8647 /* Give error if `virtual' is used outside of class declaration. */
8649 && (current_class_name == NULL_TREE || decl_context != FIELD))
8651 error ("%<virtual%> outside class declaration");
8655 /* Static anonymous unions are dealt with here. */
8656 if (staticp && decl_context == TYPENAME
8658 && ANON_AGGR_TYPE_P (declspecs->type))
8659 decl_context = FIELD;
8661 /* Warn about storage classes that are invalid for certain
8662 kinds of declarations (parameters, typenames, etc.). */
8665 && storage_class != sc_extern
8666 && storage_class != sc_static)
8667 || declspecs->specs[(int)ds_typedef]))
8669 error ("multiple storage classes in declaration of %qs", name);
8672 if (decl_context != NORMAL
8673 && ((storage_class != sc_none
8674 && storage_class != sc_mutable)
8677 if ((decl_context == PARM || decl_context == CATCHPARM)
8678 && (storage_class == sc_register
8679 || storage_class == sc_auto))
8681 else if (declspecs->specs[(int)ds_typedef])
8683 else if (decl_context == FIELD
8684 /* C++ allows static class elements. */
8685 && storage_class == sc_static)
8686 /* C++ also allows inlines and signed and unsigned elements,
8687 but in those cases we don't come in here. */
8691 if (decl_context == FIELD)
8692 error ("storage class specified for %qs", name);
8695 if (decl_context == PARM || decl_context == CATCHPARM)
8696 error ("storage class specified for parameter %qs", name);
8698 error ("storage class specified for typename");
8700 if (storage_class == sc_register
8701 || storage_class == sc_auto
8702 || storage_class == sc_extern
8704 storage_class = sc_none;
8707 else if (storage_class == sc_extern && funcdef_flag
8708 && ! toplevel_bindings_p ())
8709 error ("nested function %qs declared %<extern%>", name);
8710 else if (toplevel_bindings_p ())
8712 if (storage_class == sc_auto)
8713 error ("top-level declaration of %qs specifies %<auto%>", name);
8716 && storage_class != sc_extern
8717 && storage_class != sc_static)
8719 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8724 if (storage_class && friendp)
8726 error ("storage class specifiers invalid in friend function declarations");
8727 storage_class = sc_none;
8732 unqualified_id = NULL_TREE;
8735 unqualified_id = id_declarator->u.id.unqualified_name;
8736 switch (TREE_CODE (unqualified_id))
8739 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8740 if (TYPE_P (unqualified_id))
8741 unqualified_id = constructor_name (unqualified_id);
8744 case IDENTIFIER_NODE:
8745 case TEMPLATE_ID_EXPR:
8753 /* Determine the type of the entity declared by recurring on the
8755 for (; declarator; declarator = declarator->declarator)
8757 const cp_declarator *inner_declarator;
8760 if (type == error_mark_node)
8761 return error_mark_node;
8763 attrs = declarator->attributes;
8769 if (declarator == NULL || declarator->kind == cdk_id)
8770 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8771 if (declarator->kind == cdk_function)
8772 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8773 if (declarator->kind == cdk_array)
8774 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8775 returned_attrs = decl_attributes (&type,
8776 chainon (returned_attrs, attrs),
8780 if (declarator->kind == cdk_id)
8783 inner_declarator = declarator->declarator;
8785 switch (declarator->kind)
8788 type = create_array_type_for_decl (dname, type,
8789 declarator->u.array.bounds);
8797 /* Declaring a function type.
8798 Make sure we have a valid type for the function to return. */
8800 if (type_quals != TYPE_UNQUALIFIED)
8802 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8803 warning (OPT_Wignored_qualifiers,
8804 "type qualifiers ignored on function return type");
8805 /* We now know that the TYPE_QUALS don't apply to the
8806 decl, but to its return type. */
8807 type_quals = TYPE_UNQUALIFIED;
8809 errmsg = targetm.invalid_return_type (type);
8813 type = integer_type_node;
8816 /* Error about some types functions can't return. */
8818 if (TREE_CODE (type) == FUNCTION_TYPE)
8820 error ("%qs declared as function returning a function", name);
8821 return error_mark_node;
8823 if (TREE_CODE (type) == ARRAY_TYPE)
8825 error ("%qs declared as function returning an array", name);
8826 return error_mark_node;
8829 /* Pick up type qualifiers which should be applied to `this'. */
8830 memfn_quals = declarator->u.function.qualifiers;
8832 /* Pick up the exception specifications. */
8833 raises = declarator->u.function.exception_specification;
8835 /* Say it's a definition only for the CALL_EXPR
8836 closest to the identifier. */
8837 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8839 /* Handle a late-specified return type. */
8842 if (type_uses_auto (type))
8844 if (!declarator->u.function.late_return_type)
8846 error ("%qs function uses %<auto%> type specifier without"
8847 " late return type", name);
8848 return error_mark_node;
8850 else if (!is_auto (type))
8852 error ("%qs function with late return type has"
8853 " %qT as its type rather than plain %<auto%>",
8855 return error_mark_node;
8858 else if (declarator->u.function.late_return_type)
8860 error ("%qs function with late return type not declared"
8861 " with %<auto%> type specifier", name);
8862 return error_mark_node;
8865 type = splice_late_return_type
8866 (type, declarator->u.function.late_return_type);
8867 if (type == error_mark_node)
8868 return error_mark_node;
8870 if (ctype == NULL_TREE
8871 && decl_context == FIELD
8873 && (friendp == 0 || dname == current_class_name))
8874 ctype = current_class_type;
8876 if (ctype && (sfk == sfk_constructor
8877 || sfk == sfk_destructor))
8879 /* We are within a class's scope. If our declarator name
8880 is the same as the class name, and we are defining
8881 a function, then it is a constructor/destructor, and
8882 therefore returns a void type. */
8884 /* ISO C++ 12.4/2. A destructor may not be declared
8885 const or volatile. A destructor may not be
8888 ISO C++ 12.1. A constructor may not be declared
8889 const or volatile. A constructor may not be
8890 virtual. A constructor may not be static. */
8892 error ((flags == DTOR_FLAG)
8893 ? "destructor cannot be static member function"
8894 : "constructor cannot be static member function");
8897 error ((flags == DTOR_FLAG)
8898 ? "destructors may not be cv-qualified"
8899 : "constructors may not be cv-qualified");
8900 memfn_quals = TYPE_UNQUALIFIED;
8903 if (decl_context == FIELD
8904 && !member_function_or_else (ctype,
8907 return error_mark_node;
8909 if (flags != DTOR_FLAG)
8911 /* It's a constructor. */
8916 permerror (input_location, "constructors cannot be declared virtual");
8919 if (decl_context == FIELD
8920 && sfk != sfk_constructor)
8921 return error_mark_node;
8923 if (decl_context == FIELD)
8929 error ("can%'t initialize friend function %qs", name);
8932 /* Cannot be both friend and virtual. */
8933 error ("virtual functions cannot be friends");
8936 if (decl_context == NORMAL)
8937 error ("friend declaration not in class definition");
8938 if (current_function_decl && funcdef_flag)
8939 error ("can%'t define friend function %qs in a local "
8943 else if (ctype && sfk == sfk_conversion)
8947 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8952 arg_types = grokparms (declarator->u.function.parameters,
8955 if (inner_declarator
8956 && inner_declarator->kind == cdk_id
8957 && inner_declarator->u.id.sfk == sfk_destructor
8958 && arg_types != void_list_node)
8960 error ("destructors may not have parameters");
8961 arg_types = void_list_node;
8965 type = build_function_type (type, arg_types);
8972 /* Filter out pointers-to-references and references-to-references.
8973 We can get these if a TYPE_DECL is used. */
8975 if (TREE_CODE (type) == REFERENCE_TYPE)
8977 if (declarator->kind != cdk_reference)
8979 error ("cannot declare pointer to %q#T", type);
8980 type = TREE_TYPE (type);
8983 /* In C++0x, we allow reference to reference declarations
8984 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8985 and template type arguments [14.3.1/4 temp.arg.type]. The
8986 check for direct reference to reference declarations, which
8987 are still forbidden, occurs below. Reasoning behind the change
8988 can be found in DR106, DR540, and the rvalue reference
8990 else if (cxx_dialect == cxx98)
8992 error ("cannot declare reference to %q#T", type);
8993 type = TREE_TYPE (type);
8996 else if (VOID_TYPE_P (type))
8998 if (declarator->kind == cdk_reference)
8999 error ("cannot declare reference to %q#T", type);
9000 else if (declarator->kind == cdk_ptrmem)
9001 error ("cannot declare pointer to %q#T member", type);
9004 /* We now know that the TYPE_QUALS don't apply to the decl,
9005 but to the target of the pointer. */
9006 type_quals = TYPE_UNQUALIFIED;
9008 if (declarator->kind == cdk_ptrmem
9009 && (TREE_CODE (type) == FUNCTION_TYPE
9010 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9012 memfn_quals |= type_memfn_quals (type);
9013 type = build_memfn_type (type,
9014 declarator->u.pointer.class_type,
9016 if (type == error_mark_node)
9017 return error_mark_node;
9018 memfn_quals = TYPE_UNQUALIFIED;
9021 if (TREE_CODE (type) == FUNCTION_TYPE
9022 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9023 error (declarator->kind == cdk_reference
9024 ? G_("cannot declare reference to qualified function type %qT")
9025 : G_("cannot declare pointer to qualified function type %qT"),
9028 /* When the pointed-to type involves components of variable size,
9029 care must be taken to ensure that the size evaluation code is
9030 emitted early enough to dominate all the possible later uses
9031 and late enough for the variables on which it depends to have
9034 This is expected to happen automatically when the pointed-to
9035 type has a name/declaration of it's own, but special attention
9036 is required if the type is anonymous.
9038 We handle the NORMAL and FIELD contexts here by inserting a
9039 dummy statement that just evaluates the size at a safe point
9040 and ensures it is not deferred until e.g. within a deeper
9041 conditional context (c++/43555).
9043 We expect nothing to be needed here for PARM or TYPENAME.
9044 Evaluating the size at this point for TYPENAME would
9045 actually be incorrect, as we might be in the middle of an
9046 expression with side effects on the pointed-to type size
9047 "arguments" prior to the pointer declaration point and the
9048 size evaluation could end up prior to the side effects. */
9050 if (!TYPE_NAME (type)
9051 && (decl_context == NORMAL || decl_context == FIELD)
9052 && at_function_scope_p ()
9053 && variably_modified_type_p (type, NULL_TREE))
9054 finish_expr_stmt (TYPE_SIZE (type));
9056 if (declarator->kind == cdk_reference)
9058 /* In C++0x, the type we are creating a reference to might be
9059 a typedef which is itself a reference type. In that case,
9060 we follow the reference collapsing rules in
9061 [7.1.3/8 dcl.typedef] to create the final reference type:
9063 "If a typedef TD names a type that is a reference to a type
9064 T, an attempt to create the type 'lvalue reference to cv TD'
9065 creates the type 'lvalue reference to T,' while an attempt
9066 to create the type "rvalue reference to cv TD' creates the
9069 if (!VOID_TYPE_P (type))
9070 type = cp_build_reference_type
9071 ((TREE_CODE (type) == REFERENCE_TYPE
9072 ? TREE_TYPE (type) : type),
9073 (declarator->u.reference.rvalue_ref
9074 && (TREE_CODE(type) != REFERENCE_TYPE
9075 || TYPE_REF_IS_RVALUE (type))));
9077 /* In C++0x, we need this check for direct reference to
9078 reference declarations, which are forbidden by
9079 [8.3.2/5 dcl.ref]. Reference to reference declarations
9080 are only allowed indirectly through typedefs and template
9081 type arguments. Example:
9083 void foo(int & &); // invalid ref-to-ref decl
9085 typedef int & int_ref;
9086 void foo(int_ref &); // valid ref-to-ref decl
9088 if (inner_declarator && inner_declarator->kind == cdk_reference)
9089 error ("cannot declare reference to %q#T, which is not "
9090 "a typedef or a template type argument", type);
9092 else if (TREE_CODE (type) == METHOD_TYPE)
9093 type = build_ptrmemfunc_type (build_pointer_type (type));
9094 else if (declarator->kind == cdk_ptrmem)
9096 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9098 if (declarator->u.pointer.class_type == error_mark_node)
9099 /* We will already have complained. */
9100 type = error_mark_node;
9102 type = build_ptrmem_type (declarator->u.pointer.class_type,
9106 type = build_pointer_type (type);
9108 /* Process a list of type modifier keywords (such as
9109 const or volatile) that were given inside the `*' or `&'. */
9111 if (declarator->u.pointer.qualifiers)
9114 = cp_build_qualified_type (type,
9115 declarator->u.pointer.qualifiers);
9116 type_quals = cp_type_quals (type);
9129 /* A `constexpr' specifier used in an object declaration declares
9130 the object as `const'. */
9131 if (constexpr_p && innermost_code != cdk_function)
9133 if (type_quals & TYPE_QUAL_CONST)
9134 error ("both %<const%> and %<constexpr%> cannot be used here");
9135 if (type_quals & TYPE_QUAL_VOLATILE)
9136 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9137 type_quals |= TYPE_QUAL_CONST;
9138 type = cp_build_qualified_type (type, type_quals);
9141 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9142 && TREE_CODE (type) != FUNCTION_TYPE
9143 && TREE_CODE (type) != METHOD_TYPE)
9145 error ("template-id %qD used as a declarator",
9147 unqualified_id = dname;
9150 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9151 qualified with a class-name, turn it into a METHOD_TYPE, unless
9152 we know that the function is static. We take advantage of this
9153 opportunity to do other processing that pertains to entities
9154 explicitly declared to be class members. Note that if DECLARATOR
9155 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9156 would not have exited the loop above. */
9158 && declarator->u.id.qualifying_scope
9159 && TYPE_P (declarator->u.id.qualifying_scope))
9163 ctype = declarator->u.id.qualifying_scope;
9164 ctype = TYPE_MAIN_VARIANT (ctype);
9166 while (t != NULL_TREE && CLASS_TYPE_P (t))
9168 /* You're supposed to have one `template <...>' for every
9169 template class, but you don't need one for a full
9170 specialization. For example:
9172 template <class T> struct S{};
9173 template <> struct S<int> { void f(); };
9174 void S<int>::f () {}
9176 is correct; there shouldn't be a `template <>' for the
9177 definition of `S<int>::f'. */
9178 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9179 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9180 /* T is an explicit (not partial) specialization. All
9181 containing classes must therefore also be explicitly
9184 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9185 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9186 template_count += 1;
9188 t = TYPE_MAIN_DECL (t);
9189 t = DECL_CONTEXT (t);
9192 if (ctype == current_class_type)
9196 permerror (input_location, "member functions are implicitly friends of their class");
9200 permerror (declarator->id_loc,
9201 "extra qualification %<%T::%> on member %qs",
9204 else if (/* If the qualifying type is already complete, then we
9205 can skip the following checks. */
9206 !COMPLETE_TYPE_P (ctype)
9207 && (/* If the function is being defined, then
9208 qualifying type must certainly be complete. */
9210 /* A friend declaration of "T::f" is OK, even if
9211 "T" is a template parameter. But, if this
9212 function is not a friend, the qualifying type
9214 || (!friendp && !CLASS_TYPE_P (ctype))
9215 /* For a declaration, the type need not be
9216 complete, if either it is dependent (since there
9217 is no meaningful definition of complete in that
9218 case) or the qualifying class is currently being
9220 || !(dependent_type_p (ctype)
9221 || currently_open_class (ctype)))
9222 /* Check that the qualifying type is complete. */
9223 && !complete_type_or_else (ctype, NULL_TREE))
9224 return error_mark_node;
9225 else if (TREE_CODE (type) == FUNCTION_TYPE)
9227 if (current_class_type
9228 && (!friendp || funcdef_flag))
9231 ? "cannot define member function %<%T::%s%> within %<%T%>"
9232 : "cannot declare member function %<%T::%s%> within %<%T%>",
9233 ctype, name, current_class_type);
9234 return error_mark_node;
9237 else if (declspecs->specs[(int)ds_typedef]
9238 && current_class_type)
9240 error ("cannot declare member %<%T::%s%> within %qT",
9241 ctype, name, current_class_type);
9242 return error_mark_node;
9246 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9247 ctype = current_class_type;
9249 /* A constexpr non-static member function is implicitly const. */
9250 if (constexpr_p && ctype && staticp == 0
9251 && TREE_CODE (type) == FUNCTION_TYPE
9252 && sfk != sfk_constructor && sfk != sfk_destructor)
9253 memfn_quals |= TYPE_QUAL_CONST;
9255 /* Now TYPE has the actual type. */
9260 *attrlist = chainon (returned_attrs, *attrlist);
9262 attrlist = &returned_attrs;
9265 /* Handle parameter packs. */
9266 if (parameter_pack_p)
9268 if (decl_context == PARM)
9269 /* Turn the type into a pack expansion.*/
9270 type = make_pack_expansion (type);
9272 error ("non-parameter %qs cannot be a parameter pack", name);
9275 /* Did array size calculations overflow? */
9277 if (TREE_CODE (type) == ARRAY_TYPE
9278 && COMPLETE_TYPE_P (type)
9279 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9280 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9282 error ("size of array %qs is too large", name);
9283 /* If we proceed with the array type as it is, we'll eventually
9284 crash in tree_low_cst(). */
9285 type = error_mark_node;
9288 if ((decl_context == FIELD || decl_context == PARM)
9289 && !processing_template_decl
9290 && variably_modified_type_p (type, NULL_TREE))
9292 if (decl_context == FIELD)
9293 error ("data member may not have variably modified type %qT", type);
9295 error ("parameter may not have variably modified type %qT", type);
9296 type = error_mark_node;
9299 if (explicitp == 1 || (explicitp && friendp))
9301 /* [dcl.fct.spec] The explicit specifier shall only be used in
9302 declarations of constructors within a class definition. */
9303 error ("only declarations of constructors can be %<explicit%>");
9307 if (storage_class == sc_mutable)
9309 if (decl_context != FIELD || friendp)
9311 error ("non-member %qs cannot be declared %<mutable%>", name);
9312 storage_class = sc_none;
9314 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9316 error ("non-object member %qs cannot be declared %<mutable%>", name);
9317 storage_class = sc_none;
9319 else if (TREE_CODE (type) == FUNCTION_TYPE
9320 || TREE_CODE (type) == METHOD_TYPE)
9322 error ("function %qs cannot be declared %<mutable%>", name);
9323 storage_class = sc_none;
9327 error ("static %qs cannot be declared %<mutable%>", name);
9328 storage_class = sc_none;
9330 else if (type_quals & TYPE_QUAL_CONST)
9332 error ("const %qs cannot be declared %<mutable%>", name);
9333 storage_class = sc_none;
9335 else if (TREE_CODE (type) == REFERENCE_TYPE)
9337 permerror (input_location, "reference %qs cannot be declared "
9338 "%<mutable%>", name);
9339 storage_class = sc_none;
9343 /* If this is declaring a typedef name, return a TYPE_DECL. */
9344 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9348 /* Note that the grammar rejects storage classes
9349 in typenames, fields or parameters. */
9350 if (current_lang_name == lang_name_java)
9351 TYPE_FOR_JAVA (type) = 1;
9353 /* This declaration:
9355 typedef void f(int) const;
9357 declares a function type which is not a member of any
9358 particular class, but which is cv-qualified; for
9359 example "f S::*" declares a pointer to a const-qualified
9360 member function of S. We record the cv-qualification in the
9362 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9364 type = apply_memfn_quals (type, memfn_quals);
9366 /* We have now dealt with these qualifiers. */
9367 memfn_quals = TYPE_UNQUALIFIED;
9370 if (decl_context == FIELD)
9371 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9373 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9374 if (id_declarator && declarator->u.id.qualifying_scope) {
9375 error_at (DECL_SOURCE_LOCATION (decl),
9376 "typedef name may not be a nested-name-specifier");
9377 TREE_TYPE (decl) = error_mark_node;
9380 if (decl_context != FIELD)
9382 if (!current_function_decl)
9383 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9384 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9385 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9386 (current_function_decl)))
9387 /* The TYPE_DECL is "abstract" because there will be
9388 clones of this constructor/destructor, and there will
9389 be copies of this TYPE_DECL generated in those
9391 DECL_ABSTRACT (decl) = 1;
9393 else if (constructor_name_p (unqualified_id, current_class_type))
9394 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9395 "as enclosing class",
9398 /* If the user declares "typedef struct {...} foo" then the
9399 struct will have an anonymous name. Fill that name in now.
9400 Nothing can refer to it, so nothing needs know about the name
9402 if (type != error_mark_node
9405 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9406 && TYPE_ANONYMOUS_P (type)
9407 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9411 /* Replace the anonymous name with the real name everywhere. */
9412 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9414 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9415 /* We do not rename the debug info representing the
9416 anonymous tagged type because the standard says in
9417 [dcl.typedef] that the naming applies only for
9418 linkage purposes. */
9419 /*debug_hooks->set_name (t, decl);*/
9420 TYPE_NAME (t) = decl;
9423 if (TYPE_LANG_SPECIFIC (type))
9424 TYPE_WAS_ANONYMOUS (type) = 1;
9426 /* If this is a typedef within a template class, the nested
9427 type is a (non-primary) template. The name for the
9428 template needs updating as well. */
9429 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9430 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9431 = TYPE_IDENTIFIER (type);
9433 /* Adjust linkage now that we aren't anonymous anymore. */
9434 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9435 determine_visibility (TYPE_MAIN_DECL (type));
9437 /* FIXME remangle member functions; member functions of a
9438 type with external linkage have external linkage. */
9442 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9443 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9445 bad_specifiers (decl, BSP_TYPE, virtualp,
9446 memfn_quals != TYPE_UNQUALIFIED,
9447 inlinep, friendp, raises != NULL_TREE);
9452 /* Detect the case of an array type of unspecified size
9453 which came, as such, direct from a typedef name.
9454 We must copy the type, so that the array's domain can be
9455 individually set by the object's initializer. */
9457 if (type && typedef_type
9458 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9459 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9460 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9462 /* Detect where we're using a typedef of function type to declare a
9463 function. PARMS will not be set, so we must create it now. */
9465 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9467 tree decls = NULL_TREE;
9470 for (args = TYPE_ARG_TYPES (type);
9471 args && args != void_list_node;
9472 args = TREE_CHAIN (args))
9474 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9476 DECL_CHAIN (decl) = decls;
9480 parms = nreverse (decls);
9482 if (decl_context != TYPENAME)
9484 /* A cv-qualifier-seq shall only be part of the function type
9485 for a non-static member function. [8.3.5/4 dcl.fct] */
9486 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9487 && (current_class_type == NULL_TREE || staticp) )
9490 ? G_("qualified function types cannot be used to "
9491 "declare static member functions")
9492 : G_("qualified function types cannot be used to "
9493 "declare free functions"));
9494 type = TYPE_MAIN_VARIANT (type);
9497 /* The qualifiers on the function type become the qualifiers on
9498 the non-static member function. */
9499 memfn_quals |= type_memfn_quals (type);
9500 type_quals = TYPE_UNQUALIFIED;
9504 /* If this is a type name (such as, in a cast or sizeof),
9505 compute the type and return it now. */
9507 if (decl_context == TYPENAME)
9509 /* Note that the grammar rejects storage classes
9510 in typenames, fields or parameters. */
9511 if (type_quals != TYPE_UNQUALIFIED)
9512 type_quals = TYPE_UNQUALIFIED;
9514 /* Special case: "friend class foo" looks like a TYPENAME context. */
9517 if (type_quals != TYPE_UNQUALIFIED)
9519 error ("type qualifiers specified for friend class declaration");
9520 type_quals = TYPE_UNQUALIFIED;
9524 error ("%<inline%> specified for friend class declaration");
9530 /* Don't allow friend declaration without a class-key. */
9531 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9532 permerror (input_location, "template parameters cannot be friends");
9533 else if (TREE_CODE (type) == TYPENAME_TYPE)
9534 permerror (input_location, "friend declaration requires class-key, "
9535 "i.e. %<friend class %T::%D%>",
9536 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9538 permerror (input_location, "friend declaration requires class-key, "
9539 "i.e. %<friend %#T%>",
9543 /* Only try to do this stuff if we didn't already give up. */
9544 if (type != integer_type_node)
9546 /* A friendly class? */
9547 if (current_class_type)
9548 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9551 error ("trying to make class %qT a friend of global scope",
9554 type = void_type_node;
9557 else if (memfn_quals)
9559 if (ctype == NULL_TREE
9560 && TREE_CODE (type) == METHOD_TYPE)
9561 ctype = TYPE_METHOD_BASETYPE (type);
9564 type = build_memfn_type (type, ctype, memfn_quals);
9565 /* Core issue #547: need to allow this in template type args. */
9566 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9567 type = apply_memfn_quals (type, memfn_quals);
9569 error ("invalid qualifiers on non-member function type");
9574 else if (unqualified_id == NULL_TREE && decl_context != PARM
9575 && decl_context != CATCHPARM
9576 && TREE_CODE (type) != UNION_TYPE
9579 error ("abstract declarator %qT used as declaration", type);
9580 return error_mark_node;
9583 /* Only functions may be declared using an operator-function-id. */
9585 && IDENTIFIER_OPNAME_P (unqualified_id)
9586 && TREE_CODE (type) != FUNCTION_TYPE
9587 && TREE_CODE (type) != METHOD_TYPE)
9589 error ("declaration of %qD as non-function", unqualified_id);
9590 return error_mark_node;
9593 /* We don't check parameter types here because we can emit a better
9594 error message later. */
9595 if (decl_context != PARM)
9597 type = check_var_type (unqualified_id, type);
9598 if (type == error_mark_node)
9599 return error_mark_node;
9602 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9603 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9605 if (decl_context == PARM || decl_context == CATCHPARM)
9607 if (ctype || in_namespace)
9608 error ("cannot use %<::%> in parameter declaration");
9610 /* A parameter declared as an array of T is really a pointer to T.
9611 One declared as a function is really a pointer to a function.
9612 One declared as a member is really a pointer to member. */
9614 if (TREE_CODE (type) == ARRAY_TYPE)
9616 /* Transfer const-ness of array into that of type pointed to. */
9617 type = build_pointer_type (TREE_TYPE (type));
9618 type_quals = TYPE_UNQUALIFIED;
9620 else if (TREE_CODE (type) == FUNCTION_TYPE)
9621 type = build_pointer_type (type);
9624 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9625 && !NEW_DELETE_OPNAME_P (unqualified_id))
9626 type = build_memfn_type (type, ctype, memfn_quals);
9631 if (decl_context == PARM)
9633 decl = cp_build_parm_decl (unqualified_id, type);
9635 bad_specifiers (decl, BSP_PARM, virtualp,
9636 memfn_quals != TYPE_UNQUALIFIED,
9637 inlinep, friendp, raises != NULL_TREE);
9639 else if (decl_context == FIELD)
9641 /* The C99 flexible array extension. */
9642 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9643 && TYPE_DOMAIN (type) == NULL_TREE)
9645 tree itype = compute_array_index_type (dname, integer_zero_node,
9646 tf_warning_or_error);
9647 type = build_cplus_array_type (TREE_TYPE (type), itype);
9650 if (type == error_mark_node)
9652 /* Happens when declaring arrays of sizes which
9653 are error_mark_node, for example. */
9656 else if (in_namespace && !friendp)
9658 /* Something like struct S { int N::j; }; */
9659 error ("invalid use of %<::%>");
9660 return error_mark_node;
9662 else if (TREE_CODE (type) == FUNCTION_TYPE
9663 || TREE_CODE (type) == METHOD_TYPE)
9666 tree function_context;
9670 /* This should never happen in pure C++ (the check
9671 could be an assert). It could happen in
9672 Objective-C++ if someone writes invalid code that
9673 uses a function declaration for an instance
9674 variable or property (instance variables and
9675 properties are parsed as FIELD_DECLs, but they are
9676 part of an Objective-C class, not a C++ class).
9677 That code is invalid and is caught by this
9681 error ("declaration of function %qD in invalid context",
9683 return error_mark_node;
9686 /* ``A union may [ ... ] not [ have ] virtual functions.''
9688 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9690 error ("function %qD declared virtual inside a union",
9692 return error_mark_node;
9695 if (NEW_DELETE_OPNAME_P (unqualified_id))
9699 error ("%qD cannot be declared virtual, since it "
9707 /* Check that the name used for a destructor makes sense. */
9708 if (sfk == sfk_destructor)
9710 tree uqname = id_declarator->u.id.unqualified_name;
9714 gcc_assert (friendp);
9715 error ("expected qualified name in friend declaration "
9716 "for destructor %qD", uqname);
9717 return error_mark_node;
9720 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9722 error ("declaration of %qD as member of %qT",
9724 return error_mark_node;
9728 error ("a destructor cannot be %<constexpr%>");
9729 return error_mark_node;
9732 else if (sfk == sfk_constructor && friendp && !ctype)
9734 error ("expected qualified name in friend declaration "
9735 "for constructor %qD",
9736 id_declarator->u.id.unqualified_name);
9737 return error_mark_node;
9740 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9741 function_context = (ctype != NULL_TREE) ?
9742 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9743 publicp = (! friendp || ! staticp)
9744 && function_context == NULL_TREE;
9745 decl = grokfndecl (ctype, type,
9746 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9747 ? unqualified_id : dname,
9750 virtualp, flags, memfn_quals, raises,
9751 friendp ? -1 : 0, friendp, publicp,
9752 inlinep | (2 * constexpr_p),
9754 funcdef_flag, template_count, in_namespace,
9755 attrlist, declarator->id_loc);
9756 if (decl == NULL_TREE)
9757 return error_mark_node;
9759 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9760 /* The decl and setting of decl_attr is also turned off. */
9761 decl = build_decl_attribute_variant (decl, decl_attr);
9764 /* [class.conv.ctor]
9766 A constructor declared without the function-specifier
9767 explicit that can be called with a single parameter
9768 specifies a conversion from the type of its first
9769 parameter to the type of its class. Such a constructor
9770 is called a converting constructor. */
9772 DECL_NONCONVERTING_P (decl) = 1;
9774 else if (!staticp && !dependent_type_p (type)
9775 && !COMPLETE_TYPE_P (complete_type (type))
9776 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9779 error ("field %qD has incomplete type", unqualified_id);
9781 error ("name %qT has incomplete type", type);
9783 /* If we're instantiating a template, tell them which
9784 instantiation made the field's type be incomplete. */
9785 if (current_class_type
9786 && TYPE_NAME (current_class_type)
9787 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9789 && declspecs->type == type)
9790 error (" in instantiation of template %qT",
9791 current_class_type);
9793 return error_mark_node;
9799 error ("%qE is neither function nor member function; "
9800 "cannot be declared friend", unqualified_id);
9808 /* Friends are treated specially. */
9809 if (ctype == current_class_type)
9810 ; /* We already issued a permerror. */
9811 else if (decl && DECL_NAME (decl))
9813 if (template_class_depth (current_class_type) == 0)
9815 decl = check_explicit_specialization
9816 (unqualified_id, decl, template_count,
9817 2 * funcdef_flag + 4);
9818 if (decl == error_mark_node)
9819 return error_mark_node;
9822 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9823 decl = do_friend (ctype, unqualified_id, decl,
9829 return error_mark_node;
9832 /* Structure field. It may not be a function, except for C++. */
9834 if (decl == NULL_TREE)
9840 /* An attempt is being made to initialize a non-static
9841 member. But, from [class.mem]:
9843 4 A member-declarator can contain a
9844 constant-initializer only if it declares a static
9845 member (_class.static_) of integral or enumeration
9846 type, see _class.static.data_.
9848 This used to be relatively common practice, but
9849 the rest of the compiler does not correctly
9850 handle the initialization unless the member is
9851 static so we make it static below. */
9852 if (cxx_dialect >= cxx0x)
9854 sorry ("non-static data member initializers");
9858 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9860 permerror (input_location, "making %qD static", unqualified_id);
9865 if (uses_template_parms (type))
9866 /* We'll check at instantiation time. */
9868 else if (constexpr_p)
9869 /* constexpr has the same requirements. */
9871 else if (check_static_variable_definition (unqualified_id,
9873 /* If we just return the declaration, crashes
9874 will sometimes occur. We therefore return
9875 void_type_node, as if this was a friend
9876 declaration, to cause callers to completely
9877 ignore this declaration. */
9878 return error_mark_node;
9883 /* C++ allows static class members. All other work
9884 for this is done by grokfield. */
9885 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9886 set_linkage_for_static_data_member (decl);
9887 /* Even if there is an in-class initialization, DECL
9888 is considered undefined until an out-of-class
9889 definition is provided. */
9890 DECL_EXTERNAL (decl) = 1;
9893 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9895 if (constexpr_p && !initialized)
9897 error ("constexpr static data member %qD must have an "
9898 "initializer", decl);
9899 constexpr_p = false;
9906 error ("non-static data member %qE declared %<constexpr%>",
9908 constexpr_p = false;
9910 decl = build_decl (input_location,
9911 FIELD_DECL, unqualified_id, type);
9912 DECL_NONADDRESSABLE_P (decl) = bitfield;
9913 if (bitfield && !unqualified_id)
9914 TREE_NO_WARNING (decl) = 1;
9916 if (storage_class == sc_mutable)
9918 DECL_MUTABLE_P (decl) = 1;
9919 storage_class = sc_none;
9923 bad_specifiers (decl, BSP_FIELD, virtualp,
9924 memfn_quals != TYPE_UNQUALIFIED,
9925 inlinep, friendp, raises != NULL_TREE);
9928 else if (TREE_CODE (type) == FUNCTION_TYPE
9929 || TREE_CODE (type) == METHOD_TYPE)
9934 if (!unqualified_id)
9935 return error_mark_node;
9937 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9938 original_name = dname;
9940 original_name = unqualified_id;
9942 if (storage_class == sc_auto)
9943 error ("storage class %<auto%> invalid for function %qs", name);
9944 else if (storage_class == sc_register)
9945 error ("storage class %<register%> invalid for function %qs", name);
9947 error ("storage class %<__thread%> invalid for function %qs", name);
9949 /* Function declaration not at top level.
9950 Storage classes other than `extern' are not allowed
9951 and `extern' makes no difference. */
9952 if (! toplevel_bindings_p ()
9953 && (storage_class == sc_static
9954 || declspecs->specs[(int)ds_inline])
9957 if (storage_class == sc_static)
9958 pedwarn (input_location, OPT_pedantic,
9959 "%<static%> specified invalid for function %qs "
9960 "declared out of global scope", name);
9962 pedwarn (input_location, OPT_pedantic,
9963 "%<inline%> specifier invalid for function %qs "
9964 "declared out of global scope", name);
9967 if (ctype != NULL_TREE
9968 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9970 error ("%q#T is not a class or a namespace", ctype);
9974 if (ctype == NULL_TREE)
9978 error ("virtual non-class function %qs", name);
9981 else if (sfk == sfk_constructor
9982 || sfk == sfk_destructor)
9985 ? "%qs defined in a non-class scope"
9986 : "%qs declared in a non-class scope", name);
9991 /* Record presence of `static'. */
9992 publicp = (ctype != NULL_TREE
9993 || storage_class == sc_extern
9994 || storage_class != sc_static);
9996 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9997 virtualp, flags, memfn_quals, raises,
9999 publicp, inlinep | (2 * constexpr_p), sfk,
10001 template_count, in_namespace, attrlist,
10002 declarator->id_loc);
10003 if (decl == NULL_TREE)
10004 return error_mark_node;
10008 int invalid_static = 0;
10010 /* Don't allow a static member function in a class, and forbid
10011 declaring main to be static. */
10012 if (TREE_CODE (type) == METHOD_TYPE)
10014 permerror (input_location, "cannot declare member function %qD to have "
10015 "static linkage", decl);
10016 invalid_static = 1;
10018 else if (current_function_decl)
10020 /* FIXME need arm citation */
10021 error ("cannot declare static function inside another function");
10022 invalid_static = 1;
10025 if (invalid_static)
10028 storage_class = sc_none;
10034 /* It's a variable. */
10036 /* An uninitialized decl with `extern' is a reference. */
10037 decl = grokvardecl (type, unqualified_id,
10040 (type_quals & TYPE_QUAL_CONST) != 0,
10041 ctype ? ctype : in_namespace);
10042 bad_specifiers (decl, BSP_VAR, virtualp,
10043 memfn_quals != TYPE_UNQUALIFIED,
10044 inlinep, friendp, raises != NULL_TREE);
10048 DECL_CONTEXT (decl) = ctype;
10051 permerror (input_location, "%<static%> may not be used when defining "
10052 "(as opposed to declaring) a static data member");
10054 storage_class = sc_none;
10056 if (storage_class == sc_register && TREE_STATIC (decl))
10058 error ("static member %qD declared %<register%>", decl);
10059 storage_class = sc_none;
10061 if (storage_class == sc_extern && pedantic)
10063 pedwarn (input_location, OPT_pedantic,
10064 "cannot explicitly declare member %q#D to have "
10065 "extern linkage", decl);
10066 storage_class = sc_none;
10069 else if (constexpr_p && DECL_EXTERNAL (decl))
10070 error ("declaration of constexpr variable %qD is not a definition",
10074 if (storage_class == sc_extern && initialized && !funcdef_flag)
10076 if (toplevel_bindings_p ())
10078 /* It's common practice (and completely valid) to have a const
10079 be initialized and declared extern. */
10080 if (!(type_quals & TYPE_QUAL_CONST))
10081 warning (0, "%qs initialized and declared %<extern%>", name);
10085 error ("%qs has both %<extern%> and initializer", name);
10086 return error_mark_node;
10090 /* Record `register' declaration for warnings on &
10091 and in case doing stupid register allocation. */
10093 if (storage_class == sc_register)
10094 DECL_REGISTER (decl) = 1;
10095 else if (storage_class == sc_extern)
10096 DECL_THIS_EXTERN (decl) = 1;
10097 else if (storage_class == sc_static)
10098 DECL_THIS_STATIC (decl) = 1;
10100 /* Don't forget constexprness. */
10102 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10104 /* Record constancy and volatility on the DECL itself . There's
10105 no need to do this when processing a template; we'll do this
10106 for the instantiated declaration based on the type of DECL. */
10107 if (!processing_template_decl)
10108 cp_apply_type_quals_to_decl (type_quals, decl);
10114 /* Subroutine of start_function. Ensure that each of the parameter
10115 types (as listed in PARMS) is complete, as is required for a
10116 function definition. */
10119 require_complete_types_for_parms (tree parms)
10121 for (; parms; parms = DECL_CHAIN (parms))
10123 if (dependent_type_p (TREE_TYPE (parms)))
10125 if (!VOID_TYPE_P (TREE_TYPE (parms))
10126 && complete_type_or_else (TREE_TYPE (parms), parms))
10128 relayout_decl (parms);
10129 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10132 /* grokparms or complete_type_or_else will have already issued
10134 TREE_TYPE (parms) = error_mark_node;
10138 /* Returns nonzero if T is a local variable. */
10141 local_variable_p (const_tree t)
10143 if ((TREE_CODE (t) == VAR_DECL
10144 /* A VAR_DECL with a context that is a _TYPE is a static data
10146 && !TYPE_P (CP_DECL_CONTEXT (t))
10147 /* Any other non-local variable must be at namespace scope. */
10148 && !DECL_NAMESPACE_SCOPE_P (t))
10149 || (TREE_CODE (t) == PARM_DECL))
10155 /* Like local_variable_p, but suitable for use as a tree-walking
10159 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10160 void *data ATTRIBUTE_UNUSED)
10162 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10164 else if (TYPE_P (*tp))
10165 *walk_subtrees = 0;
10171 /* Check that ARG, which is a default-argument expression for a
10172 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10173 something goes wrong. DECL may also be a _TYPE node, rather than a
10174 DECL, if there is no DECL available. */
10177 check_default_argument (tree decl, tree arg)
10182 if (TREE_CODE (arg) == DEFAULT_ARG)
10183 /* We get a DEFAULT_ARG when looking at an in-class declaration
10184 with a default argument. Ignore the argument for now; we'll
10185 deal with it after the class is complete. */
10194 decl_type = TREE_TYPE (decl);
10196 if (arg == error_mark_node
10197 || decl == error_mark_node
10198 || TREE_TYPE (arg) == error_mark_node
10199 || decl_type == error_mark_node)
10200 /* Something already went wrong. There's no need to check
10202 return error_mark_node;
10204 /* [dcl.fct.default]
10206 A default argument expression is implicitly converted to the
10208 if (!TREE_TYPE (arg)
10209 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10212 error ("default argument for %q#D has type %qT",
10213 decl, TREE_TYPE (arg));
10215 error ("default argument for parameter of type %qT has type %qT",
10216 decl_type, TREE_TYPE (arg));
10218 return error_mark_node;
10221 /* [dcl.fct.default]
10223 Local variables shall not be used in default argument
10226 The keyword `this' shall not be used in a default argument of a
10227 member function. */
10228 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10231 error ("default argument %qE uses local variable %qD", arg, var);
10232 return error_mark_node;
10239 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10242 type_is_deprecated (tree type)
10244 enum tree_code code;
10245 if (TREE_DEPRECATED (type))
10247 if (TYPE_NAME (type)
10248 && TREE_DEPRECATED (TYPE_NAME (type)))
10251 /* Do warn about using typedefs to a deprecated class. */
10252 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10253 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10255 code = TREE_CODE (type);
10257 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10258 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10259 || code == METHOD_TYPE || code == ARRAY_TYPE)
10260 return type_is_deprecated (TREE_TYPE (type));
10262 if (TYPE_PTRMEMFUNC_P (type))
10263 return type_is_deprecated
10264 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10269 /* Decode the list of parameter types for a function type.
10270 Given the list of things declared inside the parens,
10271 return a list of types.
10273 If this parameter does not end with an ellipsis, we append
10276 *PARMS is set to the chain of PARM_DECLs created. */
10279 grokparms (tree parmlist, tree *parms)
10281 tree result = NULL_TREE;
10282 tree decls = NULL_TREE;
10286 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10288 tree type = NULL_TREE;
10289 tree init = TREE_PURPOSE (parm);
10290 tree decl = TREE_VALUE (parm);
10291 const char *errmsg;
10293 if (parm == void_list_node)
10296 if (! decl || TREE_TYPE (decl) == error_mark_node)
10299 type = TREE_TYPE (decl);
10300 if (VOID_TYPE_P (type))
10302 if (same_type_p (type, void_type_node)
10303 && DECL_SELF_REFERENCE_P (type)
10304 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10305 /* this is a parmlist of `(void)', which is ok. */
10307 cxx_incomplete_type_error (decl, type);
10308 /* It's not a good idea to actually create parameters of
10309 type `void'; other parts of the compiler assume that a
10310 void type terminates the parameter list. */
10311 type = error_mark_node;
10312 TREE_TYPE (decl) = error_mark_node;
10315 if (type != error_mark_node
10316 && TYPE_FOR_JAVA (type)
10317 && MAYBE_CLASS_TYPE_P (type))
10319 error ("parameter %qD has Java class type", decl);
10320 type = error_mark_node;
10321 TREE_TYPE (decl) = error_mark_node;
10325 if (type != error_mark_node
10326 && (errmsg = targetm.invalid_parameter_type (type)))
10329 type = error_mark_node;
10330 TREE_TYPE (decl) = error_mark_node;
10333 if (type != error_mark_node)
10335 if (deprecated_state != DEPRECATED_SUPPRESS)
10337 tree deptype = type_is_deprecated (type);
10339 warn_deprecated_use (deptype, NULL_TREE);
10342 /* Top-level qualifiers on the parameters are
10343 ignored for function types. */
10344 type = cp_build_qualified_type (type, 0);
10345 if (TREE_CODE (type) == METHOD_TYPE)
10347 error ("parameter %qD invalidly declared method type", decl);
10348 type = build_pointer_type (type);
10349 TREE_TYPE (decl) = type;
10351 else if (abstract_virtuals_error (decl, type))
10352 any_error = 1; /* Seems like a good idea. */
10353 else if (POINTER_TYPE_P (type))
10355 /* [dcl.fct]/6, parameter types cannot contain pointers
10356 (references) to arrays of unknown bound. */
10357 tree t = TREE_TYPE (type);
10358 int ptr = TYPE_PTR_P (type);
10362 if (TYPE_PTR_P (t))
10364 else if (TREE_CODE (t) != ARRAY_TYPE)
10366 else if (!TYPE_DOMAIN (t))
10370 if (TREE_CODE (t) == ARRAY_TYPE)
10372 ? G_("parameter %qD includes pointer to array of "
10373 "unknown bound %qT")
10374 : G_("parameter %qD includes reference to array of "
10375 "unknown bound %qT"),
10381 else if (init && !processing_template_decl)
10382 init = check_default_argument (decl, init);
10385 if (TREE_CODE (decl) == PARM_DECL
10386 && FUNCTION_PARAMETER_PACK_P (decl)
10387 && TREE_CHAIN (parm)
10388 && TREE_CHAIN (parm) != void_list_node)
10389 error ("parameter packs must be at the end of the parameter list");
10391 DECL_CHAIN (decl) = decls;
10393 result = tree_cons (init, type, result);
10395 decls = nreverse (decls);
10396 result = nreverse (result);
10398 result = chainon (result, void_list_node);
10405 /* D is a constructor or overloaded `operator='.
10407 Let T be the class in which D is declared. Then, this function
10410 -1 if D's is an ill-formed constructor or copy assignment operator
10411 whose first parameter is of type `T'.
10412 0 if D is not a copy constructor or copy assignment
10414 1 if D is a copy constructor or copy assignment operator whose
10415 first parameter is a reference to non-const qualified T.
10416 2 if D is a copy constructor or copy assignment operator whose
10417 first parameter is a reference to const qualified T.
10419 This function can be used as a predicate. Positive values indicate
10420 a copy constructor and nonzero values indicate a copy assignment
10424 copy_fn_p (const_tree d)
10430 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10432 if (TREE_CODE (d) == TEMPLATE_DECL
10433 || (DECL_TEMPLATE_INFO (d)
10434 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10435 /* Instantiations of template member functions are never copy
10436 functions. Note that member functions of templated classes are
10437 represented as template functions internally, and we must
10438 accept those as copy functions. */
10441 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10445 arg_type = TREE_VALUE (args);
10446 if (arg_type == error_mark_node)
10449 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10451 /* Pass by value copy assignment operator. */
10454 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10455 && !TYPE_REF_IS_RVALUE (arg_type)
10456 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10458 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10464 args = TREE_CHAIN (args);
10466 if (args && args != void_list_node && !TREE_PURPOSE (args))
10467 /* There are more non-optional args. */
10473 /* D is a constructor or overloaded `operator='.
10475 Let T be the class in which D is declared. Then, this function
10476 returns true when D is a move constructor or move assignment
10477 operator, false otherwise. */
10480 move_fn_p (const_tree d)
10484 bool result = false;
10486 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10488 if (cxx_dialect == cxx98)
10489 /* There are no move constructors if we are in C++98 mode. */
10492 if (TREE_CODE (d) == TEMPLATE_DECL
10493 || (DECL_TEMPLATE_INFO (d)
10494 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10495 /* Instantiations of template member functions are never copy
10496 functions. Note that member functions of templated classes are
10497 represented as template functions internally, and we must
10498 accept those as copy functions. */
10501 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10505 arg_type = TREE_VALUE (args);
10506 if (arg_type == error_mark_node)
10509 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10510 && TYPE_REF_IS_RVALUE (arg_type)
10511 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10515 args = TREE_CHAIN (args);
10517 if (args && args != void_list_node && !TREE_PURPOSE (args))
10518 /* There are more non-optional args. */
10524 /* Remember any special properties of member function DECL. */
10527 grok_special_member_properties (tree decl)
10531 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10534 class_type = DECL_CONTEXT (decl);
10535 if (DECL_CONSTRUCTOR_P (decl))
10537 int ctor = copy_fn_p (decl);
10539 if (!DECL_ARTIFICIAL (decl))
10540 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10546 A non-template constructor for class X is a copy
10547 constructor if its first parameter is of type X&, const
10548 X&, volatile X& or const volatile X&, and either there
10549 are no other parameters or else all other parameters have
10550 default arguments. */
10551 TYPE_HAS_COPY_CTOR (class_type) = 1;
10552 if (user_provided_p (decl))
10553 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10555 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10557 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10559 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10560 if (user_provided_p (decl))
10561 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10563 else if (move_fn_p (decl) && user_provided_p (decl))
10564 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10565 else if (is_list_ctor (decl))
10566 TYPE_HAS_LIST_CTOR (class_type) = 1;
10568 if (DECL_DECLARED_CONSTEXPR_P (decl)
10569 && !copy_fn_p (decl) && !move_fn_p (decl))
10570 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10572 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10576 A non-template assignment operator for class X is a copy
10577 assignment operator if its parameter is of type X, X&, const
10578 X&, volatile X& or const volatile X&. */
10580 int assop = copy_fn_p (decl);
10584 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10585 if (user_provided_p (decl))
10586 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10588 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10590 else if (move_fn_p (decl) && user_provided_p (decl))
10591 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10593 /* Destructors are handled in check_methods. */
10596 /* Check a constructor DECL has the correct form. Complains
10597 if the class has a constructor of the form X(X). */
10600 grok_ctor_properties (const_tree ctype, const_tree decl)
10602 int ctor_parm = copy_fn_p (decl);
10608 A declaration of a constructor for a class X is ill-formed if
10609 its first parameter is of type (optionally cv-qualified) X
10610 and either there are no other parameters or else all other
10611 parameters have default arguments.
10613 We *don't* complain about member template instantiations that
10614 have this form, though; they can occur as we try to decide
10615 what constructor to use during overload resolution. Since
10616 overload resolution will never prefer such a constructor to
10617 the non-template copy constructor (which is either explicitly
10618 or implicitly defined), there's no need to worry about their
10619 existence. Theoretically, they should never even be
10620 instantiated, but that's hard to forestall. */
10621 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10629 /* An operator with this code is unary, but can also be binary. */
10632 ambi_op_p (enum tree_code code)
10634 return (code == INDIRECT_REF
10635 || code == ADDR_EXPR
10636 || code == UNARY_PLUS_EXPR
10637 || code == NEGATE_EXPR
10638 || code == PREINCREMENT_EXPR
10639 || code == PREDECREMENT_EXPR);
10642 /* An operator with this name can only be unary. */
10645 unary_op_p (enum tree_code code)
10647 return (code == TRUTH_NOT_EXPR
10648 || code == BIT_NOT_EXPR
10649 || code == COMPONENT_REF
10650 || code == TYPE_EXPR);
10653 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10654 errors are issued for invalid declarations. */
10657 grok_op_properties (tree decl, bool complain)
10659 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10661 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10662 tree name = DECL_NAME (decl);
10663 enum tree_code operator_code;
10668 /* Count the number of arguments and check for ellipsis. */
10669 for (argtype = argtypes, arity = 0;
10670 argtype && argtype != void_list_node;
10671 argtype = TREE_CHAIN (argtype))
10673 ellipsis_p = !argtype;
10675 class_type = DECL_CONTEXT (decl);
10676 if (class_type && !CLASS_TYPE_P (class_type))
10677 class_type = NULL_TREE;
10679 if (DECL_CONV_FN_P (decl))
10680 operator_code = TYPE_EXPR;
10684 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10685 if (ansi_opname (CODE) == name) \
10687 operator_code = (CODE); \
10690 else if (ansi_assopname (CODE) == name) \
10692 operator_code = (CODE); \
10693 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10697 #include "operators.def"
10698 #undef DEF_OPERATOR
10700 gcc_unreachable ();
10703 gcc_assert (operator_code != MAX_TREE_CODES);
10704 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10707 switch (operator_code)
10710 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10714 TYPE_GETS_DELETE (class_type) |= 1;
10718 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10721 case VEC_DELETE_EXPR:
10722 TYPE_GETS_DELETE (class_type) |= 2;
10729 /* [basic.std.dynamic.allocation]/1:
10731 A program is ill-formed if an allocation function is declared
10732 in a namespace scope other than global scope or declared static
10735 The same also holds true for deallocation functions. */
10736 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10737 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10739 if (DECL_NAMESPACE_SCOPE_P (decl))
10741 if (CP_DECL_CONTEXT (decl) != global_namespace)
10743 error ("%qD may not be declared within a namespace", decl);
10746 else if (!TREE_PUBLIC (decl))
10748 error ("%qD may not be declared as static", decl);
10754 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10756 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10757 DECL_IS_OPERATOR_NEW (decl) = 1;
10759 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10760 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10763 /* An operator function must either be a non-static member function
10764 or have at least one parameter of a class, a reference to a class,
10765 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10766 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10768 if (operator_code == TYPE_EXPR
10769 || operator_code == CALL_EXPR
10770 || operator_code == COMPONENT_REF
10771 || operator_code == ARRAY_REF
10772 || operator_code == NOP_EXPR)
10774 error ("%qD must be a nonstatic member function", decl);
10781 if (DECL_STATIC_FUNCTION_P (decl))
10783 error ("%qD must be either a non-static member "
10784 "function or a non-member function", decl);
10788 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10790 tree arg = non_reference (TREE_VALUE (p));
10791 if (arg == error_mark_node)
10794 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10795 because these checks are performed even on
10796 template functions. */
10797 if (MAYBE_CLASS_TYPE_P (arg)
10798 || TREE_CODE (arg) == ENUMERAL_TYPE)
10802 if (!p || p == void_list_node)
10805 error ("%qD must have an argument of class or "
10806 "enumerated type", decl);
10812 /* There are no restrictions on the arguments to an overloaded
10814 if (operator_code == CALL_EXPR)
10817 /* Warn about conversion operators that will never be used. */
10818 if (IDENTIFIER_TYPENAME_P (name)
10819 && ! DECL_TEMPLATE_INFO (decl)
10821 /* Warn only declaring the function; there is no need to
10822 warn again about out-of-class definitions. */
10823 && class_type == current_class_type)
10825 tree t = TREE_TYPE (name);
10826 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10829 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10831 if (TREE_CODE (t) == VOID_TYPE)
10832 warning (OPT_Wconversion,
10834 ? G_("conversion to a reference to void "
10835 "will never use a type conversion operator")
10836 : G_("conversion to void "
10837 "will never use a type conversion operator"));
10838 else if (class_type)
10840 if (t == class_type)
10841 warning (OPT_Wconversion,
10843 ? G_("conversion to a reference to the same type "
10844 "will never use a type conversion operator")
10845 : G_("conversion to the same type "
10846 "will never use a type conversion operator"));
10847 /* Don't force t to be complete here. */
10848 else if (MAYBE_CLASS_TYPE_P (t)
10849 && COMPLETE_TYPE_P (t)
10850 && DERIVED_FROM_P (t, class_type))
10851 warning (OPT_Wconversion,
10853 ? G_("conversion to a reference to a base class "
10854 "will never use a type conversion operator")
10855 : G_("conversion to a base class "
10856 "will never use a type conversion operator"));
10861 if (operator_code == COND_EXPR)
10864 error ("ISO C++ prohibits overloading operator ?:");
10867 else if (ellipsis_p)
10869 error ("%qD must not have variable number of arguments", decl);
10872 else if (ambi_op_p (operator_code))
10875 /* We pick the one-argument operator codes by default, so
10876 we don't have to change anything. */
10878 else if (arity == 2)
10880 /* If we thought this was a unary operator, we now know
10881 it to be a binary operator. */
10882 switch (operator_code)
10885 operator_code = MULT_EXPR;
10889 operator_code = BIT_AND_EXPR;
10892 case UNARY_PLUS_EXPR:
10893 operator_code = PLUS_EXPR;
10897 operator_code = MINUS_EXPR;
10900 case PREINCREMENT_EXPR:
10901 operator_code = POSTINCREMENT_EXPR;
10904 case PREDECREMENT_EXPR:
10905 operator_code = POSTDECREMENT_EXPR;
10909 gcc_unreachable ();
10912 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10914 if ((operator_code == POSTINCREMENT_EXPR
10915 || operator_code == POSTDECREMENT_EXPR)
10916 && ! processing_template_decl
10917 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10920 error ("postfix %qD must take %<int%> as its argument",
10923 error ("postfix %qD must take %<int%> as its second "
10931 error ("%qD must take either zero or one argument", decl);
10933 error ("%qD must take either one or two arguments", decl);
10937 /* More Effective C++ rule 6. */
10939 && (operator_code == POSTINCREMENT_EXPR
10940 || operator_code == POSTDECREMENT_EXPR
10941 || operator_code == PREINCREMENT_EXPR
10942 || operator_code == PREDECREMENT_EXPR))
10944 tree arg = TREE_VALUE (argtypes);
10945 tree ret = TREE_TYPE (TREE_TYPE (decl));
10946 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10947 arg = TREE_TYPE (arg);
10948 arg = TYPE_MAIN_VARIANT (arg);
10949 if (operator_code == PREINCREMENT_EXPR
10950 || operator_code == PREDECREMENT_EXPR)
10952 if (TREE_CODE (ret) != REFERENCE_TYPE
10953 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10955 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10956 build_reference_type (arg));
10960 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10961 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10965 else if (unary_op_p (operator_code))
10970 error ("%qD must take %<void%>", decl);
10972 error ("%qD must take exactly one argument", decl);
10976 else /* if (binary_op_p (operator_code)) */
10981 error ("%qD must take exactly one argument", decl);
10983 error ("%qD must take exactly two arguments", decl);
10987 /* More Effective C++ rule 7. */
10989 && (operator_code == TRUTH_ANDIF_EXPR
10990 || operator_code == TRUTH_ORIF_EXPR
10991 || operator_code == COMPOUND_EXPR))
10992 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10996 /* Effective C++ rule 23. */
10999 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11000 && (operator_code == PLUS_EXPR
11001 || operator_code == MINUS_EXPR
11002 || operator_code == TRUNC_DIV_EXPR
11003 || operator_code == MULT_EXPR
11004 || operator_code == TRUNC_MOD_EXPR)
11005 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11006 warning (OPT_Weffc__, "%qD should return by value", decl);
11008 /* [over.oper]/8 */
11009 for (; argtypes && argtypes != void_list_node;
11010 argtypes = TREE_CHAIN (argtypes))
11011 if (TREE_PURPOSE (argtypes))
11013 TREE_PURPOSE (argtypes) = NULL_TREE;
11014 if (operator_code == POSTINCREMENT_EXPR
11015 || operator_code == POSTDECREMENT_EXPR)
11017 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11022 error ("%qD cannot have default arguments", decl);
11030 /* Return a string giving the keyword associate with CODE. */
11032 static const char *
11033 tag_name (enum tag_types code)
11045 case typename_type:
11048 gcc_unreachable ();
11052 /* Name lookup in an elaborated-type-specifier (after the keyword
11053 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11054 elaborated-type-specifier is invalid, issue a diagnostic and return
11055 error_mark_node; otherwise, return the *_TYPE to which it referred.
11056 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11059 check_elaborated_type_specifier (enum tag_types tag_code,
11061 bool allow_template_p)
11067 struct S { struct S *p; };
11069 name lookup will find the TYPE_DECL for the implicit "S::S"
11070 typedef. Adjust for that here. */
11071 if (DECL_SELF_REFERENCE_P (decl))
11072 decl = TYPE_NAME (TREE_TYPE (decl));
11074 type = TREE_TYPE (decl);
11076 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11077 is false for this case as well. */
11078 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11080 error ("using template type parameter %qT after %qs",
11081 type, tag_name (tag_code));
11082 return error_mark_node;
11086 If the identifier resolves to a typedef-name or a template
11087 type-parameter, the elaborated-type-specifier is ill-formed.
11089 In other words, the only legitimate declaration to use in the
11090 elaborated type specifier is the implicit typedef created when
11091 the type is declared. */
11092 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11093 && !DECL_SELF_REFERENCE_P (decl)
11094 && tag_code != typename_type)
11096 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11097 error ("%q+D has a previous declaration here", decl);
11098 return error_mark_node;
11100 else if (TREE_CODE (type) != RECORD_TYPE
11101 && TREE_CODE (type) != UNION_TYPE
11102 && tag_code != enum_type
11103 && tag_code != typename_type)
11105 error ("%qT referred to as %qs", type, tag_name (tag_code));
11106 error ("%q+T has a previous declaration here", type);
11107 return error_mark_node;
11109 else if (TREE_CODE (type) != ENUMERAL_TYPE
11110 && tag_code == enum_type)
11112 error ("%qT referred to as enum", type);
11113 error ("%q+T has a previous declaration here", type);
11114 return error_mark_node;
11116 else if (!allow_template_p
11117 && TREE_CODE (type) == RECORD_TYPE
11118 && CLASSTYPE_IS_TEMPLATE (type))
11120 /* If a class template appears as elaborated type specifier
11121 without a template header such as:
11123 template <class T> class C {};
11124 void f(class C); // No template header here
11126 then the required template argument is missing. */
11127 error ("template argument required for %<%s %T%>",
11128 tag_name (tag_code),
11129 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11130 return error_mark_node;
11136 /* Lookup NAME in elaborate type specifier in scope according to
11137 SCOPE and issue diagnostics if necessary.
11138 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11139 found, and ERROR_MARK_NODE for type error. */
11142 lookup_and_check_tag (enum tag_types tag_code, tree name,
11143 tag_scope scope, bool template_header_p)
11147 if (scope == ts_global)
11149 /* First try ordinary name lookup, ignoring hidden class name
11150 injected via friend declaration. */
11151 decl = lookup_name_prefer_type (name, 2);
11152 /* If that fails, the name will be placed in the smallest
11153 non-class, non-function-prototype scope according to 3.3.1/5.
11154 We may already have a hidden name declared as friend in this
11155 scope. So lookup again but not ignoring hidden names.
11156 If we find one, that name will be made visible rather than
11157 creating a new tag. */
11159 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11162 decl = lookup_type_scope (name, scope);
11164 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11165 decl = DECL_TEMPLATE_RESULT (decl);
11167 if (decl && TREE_CODE (decl) == TYPE_DECL)
11169 /* Look for invalid nested type:
11173 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11175 error ("%qD has the same name as the class in which it is "
11178 return error_mark_node;
11181 /* Two cases we need to consider when deciding if a class
11182 template is allowed as an elaborated type specifier:
11183 1. It is a self reference to its own class.
11184 2. It comes with a template header.
11188 template <class T> class C {
11189 class C *c1; // DECL_SELF_REFERENCE_P is true
11192 template <class U> class C; // template_header_p is true
11193 template <class T> class C<T>::D {
11194 class C *c2; // DECL_SELF_REFERENCE_P is true
11197 t = check_elaborated_type_specifier (tag_code,
11200 | DECL_SELF_REFERENCE_P (decl));
11203 else if (decl && TREE_CODE (decl) == TREE_LIST)
11205 error ("reference to %qD is ambiguous", name);
11206 print_candidates (decl);
11207 return error_mark_node;
11213 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11214 Define the tag as a forward-reference if it is not defined.
11216 If a declaration is given, process it here, and report an error if
11217 multiple declarations are not identical.
11219 SCOPE is TS_CURRENT when this is also a definition. Only look in
11220 the current frame for the name (since C++ allows new names in any
11221 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11222 declaration. Only look beginning from the current scope outward up
11223 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11225 TEMPLATE_HEADER_P is true when this declaration is preceded by
11226 a set of template parameters. */
11229 xref_tag (enum tag_types tag_code, tree name,
11230 tag_scope scope, bool template_header_p)
11232 enum tree_code code;
11234 tree context = NULL_TREE;
11236 timevar_push (TV_NAME_LOOKUP);
11238 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11244 code = RECORD_TYPE;
11250 code = ENUMERAL_TYPE;
11253 gcc_unreachable ();
11256 /* In case of anonymous name, xref_tag is only called to
11257 make type node and push name. Name lookup is not required. */
11258 if (ANON_AGGRNAME_P (name))
11261 t = lookup_and_check_tag (tag_code, name,
11262 scope, template_header_p);
11264 if (t == error_mark_node)
11265 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11267 if (scope != ts_current && t && current_class_type
11268 && template_class_depth (current_class_type)
11269 && template_header_p)
11271 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11272 definition of this tag. Since, in addition, we are currently
11273 processing a (member) template declaration of a template
11274 class, we must be very careful; consider:
11281 { template <class V>
11282 friend struct S1; };
11284 Here, the S2::S1 declaration should not be confused with the
11285 outer declaration. In particular, the inner version should
11286 have a template parameter of level 2, not level 1. This
11287 would be particularly important if the member declaration
11290 template <class V = U> friend struct S1;
11292 say, when we should tsubst into `U' when instantiating
11293 S2. On the other hand, when presented with:
11303 we must find the inner binding eventually. We
11304 accomplish this by making sure that the new type we
11305 create to represent this declaration has the right
11307 context = TYPE_CONTEXT (t);
11313 /* If no such tag is yet defined, create a forward-reference node
11314 and record it as the "definition".
11315 When a real declaration of this type is found,
11316 the forward-reference will be altered into a real type. */
11317 if (code == ENUMERAL_TYPE)
11319 error ("use of enum %q#D without previous declaration", name);
11320 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11324 t = make_class_type (code);
11325 TYPE_CONTEXT (t) = context;
11326 t = pushtag (name, t, scope);
11331 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11333 if (!redeclare_class_template (t, current_template_parms))
11334 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11336 else if (!processing_template_decl
11337 && CLASS_TYPE_P (t)
11338 && CLASSTYPE_IS_TEMPLATE (t))
11340 error ("redeclaration of %qT as a non-template", t);
11341 error ("previous declaration %q+D", t);
11342 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11345 /* Make injected friend class visible. */
11346 if (scope != ts_within_enclosing_non_class
11347 && hidden_name_p (TYPE_NAME (t)))
11349 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11350 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11352 if (TYPE_TEMPLATE_INFO (t))
11354 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11355 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11360 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
11364 xref_tag_from_type (tree old, tree id, tag_scope scope)
11366 enum tag_types tag_kind;
11368 if (TREE_CODE (old) == RECORD_TYPE)
11369 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11371 tag_kind = union_type;
11373 if (id == NULL_TREE)
11374 id = TYPE_IDENTIFIER (old);
11376 return xref_tag (tag_kind, id, scope, false);
11379 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11380 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11381 access_* node, and the TREE_VALUE is the type of the base-class.
11382 Non-NULL TREE_TYPE indicates virtual inheritance.
11384 Returns true if the binfo hierarchy was successfully created,
11385 false if an error was detected. */
11388 xref_basetypes (tree ref, tree base_list)
11391 tree binfo, base_binfo;
11392 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11393 unsigned max_bases = 0; /* Maximum direct bases. */
11395 tree default_access;
11396 tree igo_prev; /* Track Inheritance Graph Order. */
11398 if (ref == error_mark_node)
11401 /* The base of a derived class is private by default, all others are
11403 default_access = (TREE_CODE (ref) == RECORD_TYPE
11404 && CLASSTYPE_DECLARED_CLASS (ref)
11405 ? access_private_node : access_public_node);
11407 /* First, make sure that any templates in base-classes are
11408 instantiated. This ensures that if we call ourselves recursively
11409 we do not get confused about which classes are marked and which
11411 basep = &base_list;
11414 tree basetype = TREE_VALUE (*basep);
11416 if (!(processing_template_decl && uses_template_parms (basetype))
11417 && !complete_type_or_else (basetype, NULL))
11418 /* An incomplete type. Remove it from the list. */
11419 *basep = TREE_CHAIN (*basep);
11423 if (TREE_TYPE (*basep))
11425 if (CLASS_TYPE_P (basetype))
11426 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11427 basep = &TREE_CHAIN (*basep);
11431 TYPE_MARKED_P (ref) = 1;
11433 /* The binfo slot should be empty, unless this is an (ill-formed)
11435 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11437 error ("redefinition of %q#T", ref);
11441 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11443 binfo = make_tree_binfo (max_bases);
11445 TYPE_BINFO (ref) = binfo;
11446 BINFO_OFFSET (binfo) = size_zero_node;
11447 BINFO_TYPE (binfo) = ref;
11449 /* Apply base-class info set up to the variants of this type. */
11450 fixup_type_variants (ref);
11454 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11455 /* An aggregate cannot have baseclasses. */
11456 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11458 if (TREE_CODE (ref) == UNION_TYPE)
11460 error ("derived union %qT invalid", ref);
11467 if (TYPE_FOR_JAVA (ref))
11469 error ("Java class %qT cannot have multiple bases", ref);
11476 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11478 if (TYPE_FOR_JAVA (ref))
11480 error ("Java class %qT cannot have virtual bases", ref);
11485 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11487 tree access = TREE_PURPOSE (base_list);
11488 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11489 tree basetype = TREE_VALUE (base_list);
11491 if (access == access_default_node)
11492 access = default_access;
11494 if (PACK_EXPANSION_P (basetype))
11495 basetype = PACK_EXPANSION_PATTERN (basetype);
11496 if (TREE_CODE (basetype) == TYPE_DECL)
11497 basetype = TREE_TYPE (basetype);
11498 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11500 error ("base type %qT fails to be a struct or class type",
11505 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11506 TYPE_FOR_JAVA (ref) = 1;
11508 base_binfo = NULL_TREE;
11509 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11511 base_binfo = TYPE_BINFO (basetype);
11512 /* The original basetype could have been a typedef'd type. */
11513 basetype = BINFO_TYPE (base_binfo);
11515 /* Inherit flags from the base. */
11516 TYPE_HAS_NEW_OPERATOR (ref)
11517 |= TYPE_HAS_NEW_OPERATOR (basetype);
11518 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11519 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11520 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11521 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11522 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11523 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11524 CLASSTYPE_REPEATED_BASE_P (ref)
11525 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11528 /* We must do this test after we've seen through a typedef
11530 if (TYPE_MARKED_P (basetype))
11532 if (basetype == ref)
11533 error ("recursive type %qT undefined", basetype);
11535 error ("duplicate base type %qT invalid", basetype);
11539 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11540 /* Regenerate the pack expansion for the bases. */
11541 basetype = make_pack_expansion (basetype);
11543 TYPE_MARKED_P (basetype) = 1;
11545 base_binfo = copy_binfo (base_binfo, basetype, ref,
11546 &igo_prev, via_virtual);
11547 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11548 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11550 BINFO_BASE_APPEND (binfo, base_binfo);
11551 BINFO_BASE_ACCESS_APPEND (binfo, access);
11554 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11555 /* If we have space in the vbase vector, we must have shared at
11556 least one of them, and are therefore diamond shaped. */
11557 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11559 /* Unmark all the types. */
11560 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11561 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11562 TYPE_MARKED_P (ref) = 0;
11564 /* Now see if we have a repeated base type. */
11565 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11567 for (base_binfo = binfo; base_binfo;
11568 base_binfo = TREE_CHAIN (base_binfo))
11570 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11572 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11575 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11577 for (base_binfo = binfo; base_binfo;
11578 base_binfo = TREE_CHAIN (base_binfo))
11579 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11580 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11589 /* Copies the enum-related properties from type SRC to type DST.
11590 Used with the underlying type of an enum and the enum itself. */
11592 copy_type_enum (tree dst, tree src)
11594 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11595 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11596 TYPE_SIZE (dst) = TYPE_SIZE (src);
11597 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11598 SET_TYPE_MODE (dst, TYPE_MODE (src));
11599 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11600 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11601 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11602 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11605 /* Begin compiling the definition of an enumeration type.
11608 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11610 UNDERLYING_TYPE is the type that will be used as the storage for
11611 the enumeration type. This should be NULL_TREE if no storage type
11614 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11616 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11618 Returns the type object, as yet incomplete.
11619 Also records info about it so that build_enumerator
11620 may be used to declare the individual values as they are read. */
11623 start_enum (tree name, tree enumtype, tree underlying_type,
11624 bool scoped_enum_p, bool *is_new)
11626 tree prevtype = NULL_TREE;
11627 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11631 /* [C++0x dcl.enum]p5:
11633 If not explicitly specified, the underlying type of a scoped
11634 enumeration type is int. */
11635 if (!underlying_type && scoped_enum_p)
11636 underlying_type = integer_type_node;
11638 if (underlying_type)
11639 underlying_type = cv_unqualified (underlying_type);
11641 /* If this is the real definition for a previous forward reference,
11642 fill in the contents in the same object that used to be the
11643 forward reference. */
11645 enumtype = lookup_and_check_tag (enum_type, name,
11646 /*tag_scope=*/ts_current,
11647 /*template_header_p=*/false);
11649 /* In case of a template_decl, the only check that should be deferred
11650 to instantiation time is the comparison of underlying types. */
11651 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11653 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11655 error_at (input_location, "scoped/unscoped mismatch "
11656 "in enum %q#T", enumtype);
11657 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11658 "previous definition here");
11659 enumtype = error_mark_node;
11661 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11663 error_at (input_location, "underlying type mismatch "
11664 "in enum %q#T", enumtype);
11665 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11666 "previous definition here");
11667 enumtype = error_mark_node;
11669 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11670 && !dependent_type_p (underlying_type)
11671 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11672 && !same_type_p (underlying_type,
11673 ENUM_UNDERLYING_TYPE (enumtype)))
11675 error_at (input_location, "different underlying type "
11676 "in enum %q#T", enumtype);
11677 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11678 "previous definition here");
11679 underlying_type = NULL_TREE;
11683 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11684 || processing_template_decl)
11686 /* In case of error, make a dummy enum to allow parsing to
11688 if (enumtype == error_mark_node)
11690 name = make_anon_name ();
11691 enumtype = NULL_TREE;
11694 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11695 of an opaque enum, or an opaque enum of an already defined
11696 enumeration (C++0x only).
11697 In any other case, it'll be NULL_TREE. */
11703 prevtype = enumtype;
11704 enumtype = cxx_make_type (ENUMERAL_TYPE);
11705 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11706 if (enumtype == error_mark_node)
11707 return error_mark_node;
11709 /* The enum is considered opaque until the opening '{' of the
11710 enumerator list. */
11711 SET_OPAQUE_ENUM_P (enumtype, true);
11712 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11715 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11717 if (underlying_type)
11719 if (CP_INTEGRAL_TYPE_P (underlying_type))
11721 copy_type_enum (enumtype, underlying_type);
11722 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11724 else if (dependent_type_p (underlying_type))
11725 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11727 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11728 underlying_type, enumtype);
11731 /* If into a template class, the returned enum is always the first
11732 declaration (opaque or not) seen. This way all the references to
11733 this type will be to the same declaration. The following ones are used
11734 only to check for definition errors. */
11735 if (prevtype && processing_template_decl)
11741 /* After processing and defining all the values of an enumeration type,
11742 install their decls in the enumeration type.
11743 ENUMTYPE is the type object. */
11746 finish_enum_value_list (tree enumtype)
11749 tree underlying_type;
11752 tree minnode, maxnode;
11755 bool fixed_underlying_type_p
11756 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11758 /* We built up the VALUES in reverse order. */
11759 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11761 /* For an enum defined in a template, just set the type of the values;
11762 all further processing is postponed until the template is
11763 instantiated. We need to set the type so that tsubst of a CONST_DECL
11765 if (processing_template_decl)
11767 for (values = TYPE_VALUES (enumtype);
11769 values = TREE_CHAIN (values))
11770 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11774 /* Determine the minimum and maximum values of the enumerators. */
11775 if (TYPE_VALUES (enumtype))
11777 minnode = maxnode = NULL_TREE;
11779 for (values = TYPE_VALUES (enumtype);
11781 values = TREE_CHAIN (values))
11783 decl = TREE_VALUE (values);
11785 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11786 each enumerator has the type of its enumeration. Prior to the
11787 closing brace, the type of each enumerator is the type of its
11788 initializing value. */
11789 TREE_TYPE (decl) = enumtype;
11791 /* Update the minimum and maximum values, if appropriate. */
11792 value = DECL_INITIAL (decl);
11793 if (value == error_mark_node)
11794 value = integer_zero_node;
11795 /* Figure out what the minimum and maximum values of the
11796 enumerators are. */
11798 minnode = maxnode = value;
11799 else if (tree_int_cst_lt (maxnode, value))
11801 else if (tree_int_cst_lt (value, minnode))
11808 If the enumerator-list is empty, the underlying type is as if
11809 the enumeration had a single enumerator with value 0. */
11810 minnode = maxnode = integer_zero_node;
11812 if (!fixed_underlying_type_p)
11814 /* Compute the number of bits require to represent all values of the
11815 enumeration. We must do this before the type of MINNODE and
11816 MAXNODE are transformed, since tree_int_cst_min_precision relies
11817 on the TREE_TYPE of the value it is passed. */
11818 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11819 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11820 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11821 int precision = MAX (lowprec, highprec);
11823 bool use_short_enum;
11825 /* Determine the underlying type of the enumeration.
11829 The underlying type of an enumeration is an integral type that
11830 can represent all the enumerator values defined in the
11831 enumeration. It is implementation-defined which integral type is
11832 used as the underlying type for an enumeration except that the
11833 underlying type shall not be larger than int unless the value of
11834 an enumerator cannot fit in an int or unsigned int.
11836 We use "int" or an "unsigned int" as the underlying type, even if
11837 a smaller integral type would work, unless the user has
11838 explicitly requested that we use the smallest possible type. The
11839 user can request that for all enumerations with a command line
11840 flag, or for just one enumeration with an attribute. */
11842 use_short_enum = flag_short_enums
11843 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11845 for (itk = (use_short_enum ? itk_char : itk_int);
11849 underlying_type = integer_types[itk];
11850 if (underlying_type != NULL_TREE
11851 && TYPE_PRECISION (underlying_type) >= precision
11852 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11855 if (itk == itk_none)
11859 IF no integral type can represent all the enumerator values, the
11860 enumeration is ill-formed. */
11861 error ("no integral type can represent all of the enumerator values "
11862 "for %qT", enumtype);
11863 precision = TYPE_PRECISION (long_long_integer_type_node);
11864 underlying_type = integer_types[itk_unsigned_long_long];
11869 The value of sizeof() applied to an enumeration type, an object
11870 of an enumeration type, or an enumerator, is the value of sizeof()
11871 applied to the underlying type. */
11872 copy_type_enum (enumtype, underlying_type);
11874 /* Compute the minimum and maximum values for the type.
11878 For an enumeration where emin is the smallest enumerator and emax
11879 is the largest, the values of the enumeration are the values of the
11880 underlying type in the range bmin to bmax, where bmin and bmax are,
11881 respectively, the smallest and largest values of the smallest bit-
11882 field that can store emin and emax. */
11884 /* The middle-end currently assumes that types with TYPE_PRECISION
11885 narrower than their underlying type are suitably zero or sign
11886 extended to fill their mode. Similarly, it assumes that the front
11887 end assures that a value of a particular type must be within
11888 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11890 We used to set these fields based on bmin and bmax, but that led
11891 to invalid assumptions like optimizing away bounds checking. So
11892 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11893 TYPE_MAX_VALUE to the values for the mode above and only restrict
11894 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11895 ENUM_UNDERLYING_TYPE (enumtype)
11896 = build_distinct_type_copy (underlying_type);
11897 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
11898 set_min_and_max_values_for_integral_type
11899 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11901 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11902 if (flag_strict_enums)
11903 set_min_and_max_values_for_integral_type (enumtype, precision,
11907 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11909 /* Convert each of the enumerators to the type of the underlying
11910 type of the enumeration. */
11911 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11913 location_t saved_location;
11915 decl = TREE_VALUE (values);
11916 saved_location = input_location;
11917 input_location = DECL_SOURCE_LOCATION (decl);
11918 if (fixed_underlying_type_p)
11919 /* If the enumeration type has a fixed underlying type, we
11920 already checked all of the enumerator values. */
11921 value = DECL_INITIAL (decl);
11923 value = perform_implicit_conversion (underlying_type,
11924 DECL_INITIAL (decl),
11925 tf_warning_or_error);
11926 input_location = saved_location;
11928 /* Do not clobber shared ints. */
11929 value = copy_node (value);
11931 TREE_TYPE (value) = enumtype;
11932 DECL_INITIAL (decl) = value;
11935 /* Fix up all variant types of this enum type. */
11936 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11937 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11939 /* Finish debugging output for this type. */
11940 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11943 /* Finishes the enum type. This is called only the first time an
11944 enumeration is seen, be it opaque or odinary.
11945 ENUMTYPE is the type object. */
11948 finish_enum (tree enumtype)
11950 if (processing_template_decl)
11952 if (at_function_scope_p ())
11953 add_stmt (build_min (TAG_DEFN, enumtype));
11957 /* Here there should not be any variants of this type. */
11958 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
11959 && !TYPE_NEXT_VARIANT (enumtype));
11962 /* Build and install a CONST_DECL for an enumeration constant of the
11963 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11964 LOC is the location of NAME.
11965 Assignment of sequential values by default is handled here. */
11968 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
11974 /* If the VALUE was erroneous, pretend it wasn't there; that will
11975 result in the enum being assigned the next value in sequence. */
11976 if (value == error_mark_node)
11979 /* Remove no-op casts from the value. */
11981 STRIP_TYPE_NOPS (value);
11983 if (! processing_template_decl)
11985 /* Validate and default VALUE. */
11986 if (value != NULL_TREE)
11988 value = cxx_constant_value (value);
11990 if (TREE_CODE (value) == INTEGER_CST
11991 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
11993 value = perform_integral_promotions (value);
11997 error ("enumerator value for %qD is not an integer constant", name);
12002 /* Default based on previous value. */
12003 if (value == NULL_TREE)
12005 if (TYPE_VALUES (enumtype))
12008 unsigned HOST_WIDE_INT lo;
12012 /* The next value is the previous value plus one.
12013 add_double doesn't know the type of the target expression,
12014 so we must check with int_fits_type_p as well. */
12015 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12016 if (error_operand_p (prev_value))
12017 value = error_mark_node;
12020 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12021 TREE_INT_CST_HIGH (prev_value),
12023 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
12025 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
12029 error ("overflow in enumeration values at %qD", name);
12030 value = error_mark_node;
12035 value = integer_zero_node;
12038 /* Remove no-op casts from the value. */
12039 STRIP_TYPE_NOPS (value);
12041 /* If the underlying type of the enum is fixed, check whether
12042 the enumerator values fits in the underlying type. If it
12043 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12044 if (ENUM_UNDERLYING_TYPE (enumtype)
12046 && TREE_CODE (value) == INTEGER_CST
12047 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12049 error ("enumerator value %E is too large for underlying type %<%T%>",
12050 value, ENUM_UNDERLYING_TYPE (enumtype));
12052 /* Silently convert the value so that we can continue. */
12053 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12058 /* C++ associates enums with global, function, or class declarations. */
12059 context = current_scope ();
12061 /* Build the actual enumeration constant. Note that the enumeration
12062 constants have the underlying type of the enum (if it is fixed)
12063 or the type of their initializer (if the underlying type of the
12064 enum is not fixed):
12068 If the underlying type is fixed, the type of each enumerator
12069 prior to the closing brace is the underlying type; if the
12070 initializing value of an enumerator cannot be represented by
12071 the underlying type, the program is ill-formed. If the
12072 underlying type is not fixed, the type of each enumerator is
12073 the type of its initializing value.
12075 If the underlying type is not fixed, it will be computed by
12076 finish_enum and we will reset the type of this enumerator. Of
12077 course, if we're processing a template, there may be no value. */
12078 type = value ? TREE_TYPE (value) : NULL_TREE;
12080 if (context && context == current_class_type)
12081 /* This enum declaration is local to the class. We need the full
12082 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12083 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12085 /* It's a global enum, or it's local to a function. (Note local to
12086 a function could mean local to a class method. */
12087 decl = build_decl (loc, CONST_DECL, name, type);
12089 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12090 TREE_CONSTANT (decl) = 1;
12091 TREE_READONLY (decl) = 1;
12092 DECL_INITIAL (decl) = value;
12094 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12095 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12096 on the TYPE_FIELDS list for `S'. (That's so that you can say
12097 things like `S::i' later.) */
12098 finish_member_declaration (decl);
12102 /* Add this enumeration constant to the list for this type. */
12103 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12106 /* Look for an enumerator with the given NAME within the enumeration
12107 type ENUMTYPE. This routine is used primarily for qualified name
12108 lookup into an enumerator in C++0x, e.g.,
12110 enum class Color { Red, Green, Blue };
12112 Color color = Color::Red;
12114 Returns the value corresponding to the enumerator, or
12115 NULL_TREE if no such enumerator was found. */
12117 lookup_enumerator (tree enumtype, tree name)
12120 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12122 e = purpose_member (name, TYPE_VALUES (enumtype));
12123 return e? TREE_VALUE (e) : NULL_TREE;
12127 /* We're defining DECL. Make sure that its type is OK. */
12130 check_function_type (tree decl, tree current_function_parms)
12132 tree fntype = TREE_TYPE (decl);
12133 tree return_type = complete_type (TREE_TYPE (fntype));
12135 /* In a function definition, arg types must be complete. */
12136 require_complete_types_for_parms (current_function_parms);
12138 if (dependent_type_p (return_type))
12140 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12141 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12143 tree args = TYPE_ARG_TYPES (fntype);
12145 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12146 error ("return type %q#T is incomplete", return_type);
12148 error ("return type has Java class type %q#T", return_type);
12150 /* Make it return void instead. */
12151 if (TREE_CODE (fntype) == METHOD_TYPE)
12152 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12154 TREE_CHAIN (args));
12156 fntype = build_function_type (void_type_node, args);
12158 = build_exception_variant (fntype,
12159 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12160 fntype = (cp_build_type_attribute_variant
12161 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12162 TREE_TYPE (decl) = fntype;
12165 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12168 /* Create the FUNCTION_DECL for a function definition.
12169 DECLSPECS and DECLARATOR are the parts of the declaration;
12170 they describe the function's name and the type it returns,
12171 but twisted together in a fashion that parallels the syntax of C.
12173 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12174 DECLARATOR is really the DECL for the function we are about to
12175 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12176 indicating that the function is an inline defined in-class.
12178 This function creates a binding context for the function body
12179 as well as setting up the FUNCTION_DECL in current_function_decl.
12181 For C++, we must first check whether that datum makes any sense.
12182 For example, "class A local_a(1,2);" means that variable local_a
12183 is an aggregate of type A, which should have a constructor
12184 applied to it with the argument list [1, 2].
12186 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12187 or may be a BLOCK if the function has been defined previously
12188 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12189 error_mark_node if the function has never been defined, or
12190 a BLOCK if the function has been defined somewhere. */
12193 start_preparsed_function (tree decl1, tree attrs, int flags)
12195 tree ctype = NULL_TREE;
12198 int doing_friend = 0;
12199 struct cp_binding_level *bl;
12200 tree current_function_parms;
12201 struct c_fileinfo *finfo
12202 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12203 bool honor_interface;
12205 /* Sanity check. */
12206 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12207 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12209 fntype = TREE_TYPE (decl1);
12210 if (TREE_CODE (fntype) == METHOD_TYPE)
12211 ctype = TYPE_METHOD_BASETYPE (fntype);
12213 /* ISO C++ 11.4/5. A friend function defined in a class is in
12214 the (lexical) scope of the class in which it is defined. */
12215 if (!ctype && DECL_FRIEND_P (decl1))
12217 ctype = DECL_FRIEND_CONTEXT (decl1);
12219 /* CTYPE could be null here if we're dealing with a template;
12220 for example, `inline friend float foo()' inside a template
12221 will have no CTYPE set. */
12222 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12228 if (DECL_DECLARED_INLINE_P (decl1)
12229 && lookup_attribute ("noinline", attrs))
12230 warning (0, "inline function %q+D given attribute noinline", decl1);
12232 /* Handle gnu_inline attribute. */
12233 if (GNU_INLINE_P (decl1))
12235 DECL_EXTERNAL (decl1) = 1;
12236 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12237 DECL_INTERFACE_KNOWN (decl1) = 1;
12238 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12241 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12242 /* This is a constructor, we must ensure that any default args
12243 introduced by this definition are propagated to the clones
12244 now. The clones are used directly in overload resolution. */
12245 adjust_clone_args (decl1);
12247 /* Sometimes we don't notice that a function is a static member, and
12248 build a METHOD_TYPE for it. Fix that up now. */
12249 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12250 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12252 revert_static_member_fn (decl1);
12256 /* Set up current_class_type, and enter the scope of the class, if
12259 push_nested_class (ctype);
12260 else if (DECL_STATIC_FUNCTION_P (decl1))
12261 push_nested_class (DECL_CONTEXT (decl1));
12263 /* Now that we have entered the scope of the class, we must restore
12264 the bindings for any template parameters surrounding DECL1, if it
12265 is an inline member template. (Order is important; consider the
12266 case where a template parameter has the same name as a field of
12267 the class.) It is not until after this point that
12268 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12269 if (flags & SF_INCLASS_INLINE)
12270 maybe_begin_member_template_processing (decl1);
12272 /* Effective C++ rule 15. */
12274 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12275 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12276 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12278 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12279 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12280 if (!DECL_INITIAL (decl1))
12281 DECL_INITIAL (decl1) = error_mark_node;
12283 /* This function exists in static storage.
12284 (This does not mean `static' in the C sense!) */
12285 TREE_STATIC (decl1) = 1;
12287 /* We must call push_template_decl after current_class_type is set
12288 up. (If we are processing inline definitions after exiting a
12289 class scope, current_class_type will be NULL_TREE until set above
12290 by push_nested_class.) */
12291 if (processing_template_decl)
12293 /* FIXME: Handle error_mark_node more gracefully. */
12294 tree newdecl1 = push_template_decl (decl1);
12295 if (newdecl1 != error_mark_node)
12299 /* We are now in the scope of the function being defined. */
12300 current_function_decl = decl1;
12302 /* Save the parm names or decls from this function's declarator
12303 where store_parm_decls will find them. */
12304 current_function_parms = DECL_ARGUMENTS (decl1);
12306 /* Make sure the parameter and return types are reasonable. When
12307 you declare a function, these types can be incomplete, but they
12308 must be complete when you define the function. */
12309 check_function_type (decl1, current_function_parms);
12311 /* Build the return declaration for the function. */
12312 restype = TREE_TYPE (fntype);
12313 if (DECL_RESULT (decl1) == NULL_TREE)
12317 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12318 DECL_ARTIFICIAL (resdecl) = 1;
12319 DECL_IGNORED_P (resdecl) = 1;
12320 DECL_RESULT (decl1) = resdecl;
12322 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12325 /* Let the user know we're compiling this function. */
12326 announce_function (decl1);
12328 /* Record the decl so that the function name is defined.
12329 If we already have a decl for this name, and it is a FUNCTION_DECL,
12330 use the old decl. */
12331 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12333 /* A specialization is not used to guide overload resolution. */
12334 if (!DECL_FUNCTION_MEMBER_P (decl1)
12335 && !(DECL_USE_TEMPLATE (decl1) &&
12336 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12338 tree olddecl = pushdecl (decl1);
12340 if (olddecl == error_mark_node)
12341 /* If something went wrong when registering the declaration,
12342 use DECL1; we have to have a FUNCTION_DECL to use when
12343 parsing the body of the function. */
12347 /* Otherwise, OLDDECL is either a previous declaration
12348 of the same function or DECL1 itself. */
12350 if (warn_missing_declarations
12351 && olddecl == decl1
12352 && !DECL_MAIN_P (decl1)
12353 && TREE_PUBLIC (decl1)
12354 && !DECL_DECLARED_INLINE_P (decl1))
12358 /* Check whether DECL1 is in an anonymous
12360 for (context = DECL_CONTEXT (decl1);
12362 context = DECL_CONTEXT (context))
12364 if (TREE_CODE (context) == NAMESPACE_DECL
12365 && DECL_NAME (context) == NULL_TREE)
12369 if (context == NULL)
12370 warning (OPT_Wmissing_declarations,
12371 "no previous declaration for %q+D", decl1);
12379 /* We need to set the DECL_CONTEXT. */
12380 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12381 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12383 fntype = TREE_TYPE (decl1);
12385 /* If #pragma weak applies, mark the decl appropriately now.
12386 The pragma only applies to global functions. Because
12387 determining whether or not the #pragma applies involves
12388 computing the mangled name for the declaration, we cannot
12389 apply the pragma until after we have merged this declaration
12390 with any previous declarations; if the original declaration
12391 has a linkage specification, that specification applies to
12392 the definition as well, and may affect the mangled name. */
12393 if (DECL_FILE_SCOPE_P (decl1))
12394 maybe_apply_pragma_weak (decl1);
12397 /* constexpr functions must have literal argument types and
12398 literal return type. */
12399 validate_constexpr_fundecl (decl1);
12401 /* Reset this in case the call to pushdecl changed it. */
12402 current_function_decl = decl1;
12404 gcc_assert (DECL_INITIAL (decl1));
12406 /* This function may already have been parsed, in which case just
12407 return; our caller will skip over the body without parsing. */
12408 if (DECL_INITIAL (decl1) != error_mark_node)
12411 /* Initialize RTL machinery. We cannot do this until
12412 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12413 even when processing a template; this is how we get
12414 CFUN set up, and our per-function variables initialized.
12415 FIXME factor out the non-RTL stuff. */
12416 bl = current_binding_level;
12417 allocate_struct_function (decl1, processing_template_decl);
12419 /* Initialize the language data structures. Whenever we start
12420 a new function, we destroy temporaries in the usual way. */
12421 cfun->language = ggc_alloc_cleared_language_function ();
12422 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12423 current_binding_level = bl;
12425 /* Even though we're inside a function body, we still don't want to
12426 call expand_expr to calculate the size of a variable-sized array.
12427 We haven't necessarily assigned RTL to all variables yet, so it's
12428 not safe to try to expand expressions involving them. */
12429 cfun->dont_save_pending_sizes_p = 1;
12431 /* Start the statement-tree, start the tree now. */
12432 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12434 /* If we are (erroneously) defining a function that we have already
12435 defined before, wipe out what we knew before. */
12436 if (!DECL_PENDING_INLINE_P (decl1))
12437 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12439 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12441 /* We know that this was set up by `grokclassfn'. We do not
12442 wait until `store_parm_decls', since evil parse errors may
12443 never get us to that point. Here we keep the consistency
12444 between `current_class_type' and `current_class_ptr'. */
12445 tree t = DECL_ARGUMENTS (decl1);
12447 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12448 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12450 cp_function_chain->x_current_class_ref
12451 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12452 cp_function_chain->x_current_class_ptr = t;
12454 /* Constructors and destructors need to know whether they're "in
12455 charge" of initializing virtual base classes. */
12456 t = DECL_CHAIN (t);
12457 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12459 current_in_charge_parm = t;
12460 t = DECL_CHAIN (t);
12462 if (DECL_HAS_VTT_PARM_P (decl1))
12464 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12465 current_vtt_parm = t;
12469 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12470 /* Implicitly-defined methods (like the
12471 destructor for a class in which no destructor
12472 is explicitly declared) must not be defined
12473 until their definition is needed. So, we
12474 ignore interface specifications for
12475 compiler-generated functions. */
12476 && !DECL_ARTIFICIAL (decl1));
12478 if (DECL_INTERFACE_KNOWN (decl1))
12480 tree ctx = decl_function_context (decl1);
12482 if (DECL_NOT_REALLY_EXTERN (decl1))
12483 DECL_EXTERNAL (decl1) = 0;
12485 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12486 && TREE_PUBLIC (ctx))
12487 /* This is a function in a local class in an extern inline
12489 comdat_linkage (decl1);
12491 /* If this function belongs to an interface, it is public.
12492 If it belongs to someone else's interface, it is also external.
12493 This only affects inlines and template instantiations. */
12494 else if (!finfo->interface_unknown && honor_interface)
12496 if (DECL_DECLARED_INLINE_P (decl1)
12497 || DECL_TEMPLATE_INSTANTIATION (decl1)
12498 || processing_template_decl)
12500 DECL_EXTERNAL (decl1)
12501 = (finfo->interface_only
12502 || (DECL_DECLARED_INLINE_P (decl1)
12503 && ! flag_implement_inlines
12504 && !DECL_VINDEX (decl1)));
12506 /* For WIN32 we also want to put these in linkonce sections. */
12507 maybe_make_one_only (decl1);
12510 DECL_EXTERNAL (decl1) = 0;
12511 DECL_INTERFACE_KNOWN (decl1) = 1;
12512 /* If this function is in an interface implemented in this file,
12513 make sure that the back end knows to emit this function
12515 if (!DECL_EXTERNAL (decl1))
12516 mark_needed (decl1);
12518 else if (finfo->interface_unknown && finfo->interface_only
12519 && honor_interface)
12521 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12522 interface, we will have both finfo->interface_unknown and
12523 finfo->interface_only set. In that case, we don't want to
12524 use the normal heuristics because someone will supply a
12525 #pragma implementation elsewhere, and deducing it here would
12526 produce a conflict. */
12527 comdat_linkage (decl1);
12528 DECL_EXTERNAL (decl1) = 0;
12529 DECL_INTERFACE_KNOWN (decl1) = 1;
12530 DECL_DEFER_OUTPUT (decl1) = 1;
12534 /* This is a definition, not a reference.
12535 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12536 if (!GNU_INLINE_P (decl1))
12537 DECL_EXTERNAL (decl1) = 0;
12539 if ((DECL_DECLARED_INLINE_P (decl1)
12540 || DECL_TEMPLATE_INSTANTIATION (decl1))
12541 && ! DECL_INTERFACE_KNOWN (decl1))
12542 DECL_DEFER_OUTPUT (decl1) = 1;
12544 DECL_INTERFACE_KNOWN (decl1) = 1;
12547 /* Determine the ELF visibility attribute for the function. We must not
12548 do this before calling "pushdecl", as we must allow "duplicate_decls"
12549 to merge any attributes appropriately. We also need to wait until
12551 if (!DECL_CLONED_FUNCTION_P (decl1))
12552 determine_visibility (decl1);
12554 begin_scope (sk_function_parms, decl1);
12558 if (DECL_DESTRUCTOR_P (decl1)
12559 || (DECL_CONSTRUCTOR_P (decl1)
12560 && targetm.cxx.cdtor_returns_this ()))
12562 cdtor_label = build_decl (input_location,
12563 LABEL_DECL, NULL_TREE, NULL_TREE);
12564 DECL_CONTEXT (cdtor_label) = current_function_decl;
12567 start_fname_decls ();
12569 store_parm_decls (current_function_parms);
12573 /* Like start_preparsed_function, except that instead of a
12574 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12576 Returns 1 on success. If the DECLARATOR is not suitable for a function
12577 (it defines a datum instead), we return 0, which tells
12578 yyparse to report a parse error. */
12581 start_function (cp_decl_specifier_seq *declspecs,
12582 const cp_declarator *declarator,
12587 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12588 if (decl1 == error_mark_node)
12590 /* If the declarator is not suitable for a function definition,
12591 cause a syntax error. */
12592 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12594 error ("invalid function declaration");
12598 if (DECL_MAIN_P (decl1))
12599 /* main must return int. grokfndecl should have corrected it
12600 (and issued a diagnostic) if the user got it wrong. */
12601 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12602 integer_type_node));
12604 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12609 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12613 use_eh_spec_block (tree fn)
12615 return (flag_exceptions && flag_enforce_eh_specs
12616 && !processing_template_decl
12617 && !type_throw_all_p (TREE_TYPE (fn))
12618 /* We insert the EH_SPEC_BLOCK only in the original
12619 function; then, it is copied automatically to the
12621 && !DECL_CLONED_FUNCTION_P (fn)
12622 /* Implicitly-generated constructors and destructors have
12623 exception specifications. However, those specifications
12624 are the union of the possible exceptions specified by the
12625 constructors/destructors for bases and members, so no
12626 unallowed exception will ever reach this function. By
12627 not creating the EH_SPEC_BLOCK we save a little memory,
12628 and we avoid spurious warnings about unreachable
12630 && !DECL_ARTIFICIAL (fn));
12633 /* Store the parameter declarations into the current function declaration.
12634 This is called after parsing the parameter declarations, before
12635 digesting the body of the function.
12637 Also install to binding contour return value identifier, if any. */
12640 store_parm_decls (tree current_function_parms)
12642 tree fndecl = current_function_decl;
12645 /* This is a chain of any other decls that came in among the parm
12646 declarations. If a parm is declared with enum {foo, bar} x;
12647 then CONST_DECLs for foo and bar are put here. */
12648 tree nonparms = NULL_TREE;
12650 if (current_function_parms)
12652 /* This case is when the function was defined with an ANSI prototype.
12653 The parms already have decls, so we need not do anything here
12654 except record them as in effect
12655 and complain if any redundant old-style parm decls were written. */
12657 tree specparms = current_function_parms;
12660 /* Must clear this because it might contain TYPE_DECLs declared
12662 current_binding_level->names = NULL;
12664 /* If we're doing semantic analysis, then we'll call pushdecl
12665 for each of these. We must do them in reverse order so that
12666 they end in the correct forward order. */
12667 specparms = nreverse (specparms);
12669 for (parm = specparms; parm; parm = next)
12671 next = DECL_CHAIN (parm);
12672 if (TREE_CODE (parm) == PARM_DECL)
12674 if (DECL_NAME (parm) == NULL_TREE
12675 || TREE_CODE (parm) != VOID_TYPE)
12678 error ("parameter %qD declared void", parm);
12682 /* If we find an enum constant or a type tag,
12683 put it aside for the moment. */
12684 TREE_CHAIN (parm) = NULL_TREE;
12685 nonparms = chainon (nonparms, parm);
12689 /* Get the decls in their original chain order and record in the
12690 function. This is all and only the PARM_DECLs that were
12691 pushed into scope by the loop above. */
12692 DECL_ARGUMENTS (fndecl) = getdecls ();
12695 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12697 /* Now store the final chain of decls for the arguments
12698 as the decl-chain of the current lexical scope.
12699 Put the enumerators in as well, at the front so that
12700 DECL_ARGUMENTS is not modified. */
12701 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12703 if (use_eh_spec_block (current_function_decl))
12704 current_eh_spec_block = begin_eh_spec_block ();
12708 /* We have finished doing semantic analysis on DECL, but have not yet
12709 generated RTL for its body. Save away our current state, so that
12710 when we want to generate RTL later we know what to do. */
12713 save_function_data (tree decl)
12715 struct language_function *f;
12717 /* Save the language-specific per-function data so that we can
12718 get it back when we really expand this function. */
12719 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12722 f = ggc_alloc_language_function ();
12723 memcpy (f, cp_function_chain, sizeof (struct language_function));
12724 DECL_SAVED_FUNCTION_DATA (decl) = f;
12726 /* Clear out the bits we don't need. */
12727 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12728 f->bindings = NULL;
12729 f->x_local_names = NULL;
12733 /* Set the return value of the constructor (if present). */
12736 finish_constructor_body (void)
12741 if (targetm.cxx.cdtor_returns_this ()
12742 && (! TYPE_FOR_JAVA (current_class_type)))
12744 /* Any return from a constructor will end up here. */
12745 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12747 val = DECL_ARGUMENTS (current_function_decl);
12748 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12749 DECL_RESULT (current_function_decl), val);
12750 /* Return the address of the object. */
12751 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12752 add_stmt (exprstmt);
12756 /* Do all the processing for the beginning of a destructor; set up the
12757 vtable pointers and cleanups for bases and members. */
12760 begin_destructor_body (void)
12762 tree compound_stmt;
12764 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12765 issued an error message. We still want to try to process the
12766 body of the function, but initialize_vtbl_ptrs will crash if
12767 TYPE_BINFO is NULL. */
12768 if (COMPLETE_TYPE_P (current_class_type))
12770 compound_stmt = begin_compound_stmt (0);
12771 /* Make all virtual function table pointers in non-virtual base
12772 classes point to CURRENT_CLASS_TYPE's virtual function
12774 initialize_vtbl_ptrs (current_class_ptr);
12775 finish_compound_stmt (compound_stmt);
12777 /* And insert cleanups for our bases and members so that they
12778 will be properly destroyed if we throw. */
12779 push_base_cleanups ();
12783 /* At the end of every destructor we generate code to delete the object if
12784 necessary. Do that now. */
12787 finish_destructor_body (void)
12791 /* Any return from a destructor will end up here; that way all base
12792 and member cleanups will be run when the function returns. */
12793 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12795 /* In a virtual destructor, we must call delete. */
12796 if (DECL_VIRTUAL_P (current_function_decl))
12799 tree virtual_size = cxx_sizeof (current_class_type);
12803 At the point of definition of a virtual destructor (including
12804 an implicit definition), non-placement operator delete shall
12805 be looked up in the scope of the destructor's class and if
12806 found shall be accessible and unambiguous. */
12807 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12809 /*global_p=*/false,
12810 /*placement=*/NULL_TREE,
12811 /*alloc_fn=*/NULL_TREE);
12813 if_stmt = begin_if_stmt ();
12814 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12815 current_in_charge_parm,
12818 finish_expr_stmt (exprstmt);
12819 finish_then_clause (if_stmt);
12820 finish_if_stmt (if_stmt);
12823 if (targetm.cxx.cdtor_returns_this ())
12827 val = DECL_ARGUMENTS (current_function_decl);
12828 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12829 DECL_RESULT (current_function_decl), val);
12830 /* Return the address of the object. */
12831 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12832 add_stmt (exprstmt);
12836 /* Do the necessary processing for the beginning of a function body, which
12837 in this case includes member-initializers, but not the catch clauses of
12838 a function-try-block. Currently, this means opening a binding level
12839 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12842 begin_function_body (void)
12846 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12849 if (processing_template_decl)
12850 /* Do nothing now. */;
12852 /* Always keep the BLOCK node associated with the outermost pair of
12853 curly braces of a function. These are needed for correct
12854 operation of dwarfout.c. */
12855 keep_next_level (true);
12857 stmt = begin_compound_stmt (BCS_FN_BODY);
12859 if (processing_template_decl)
12860 /* Do nothing now. */;
12861 else if (DECL_DESTRUCTOR_P (current_function_decl))
12862 begin_destructor_body ();
12867 /* Do the processing for the end of a function body. Currently, this means
12868 closing out the cleanups for fully-constructed bases and members, and in
12869 the case of the destructor, deleting the object if desired. Again, this
12870 is only meaningful for [cd]tors, since they are the only functions where
12871 there is a significant distinction between the main body and any
12872 function catch clauses. Handling, say, main() return semantics here
12873 would be wrong, as flowing off the end of a function catch clause for
12874 main() would also need to return 0. */
12877 finish_function_body (tree compstmt)
12879 if (compstmt == NULL_TREE)
12882 /* Close the block. */
12883 finish_compound_stmt (compstmt);
12885 if (processing_template_decl)
12886 /* Do nothing now. */;
12887 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12888 finish_constructor_body ();
12889 else if (DECL_DESTRUCTOR_P (current_function_decl))
12890 finish_destructor_body ();
12893 /* Given a function, returns the BLOCK corresponding to the outermost level
12894 of curly braces, skipping the artificial block created for constructor
12898 outer_curly_brace_block (tree fndecl)
12900 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12901 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12902 /* Skip the artificial function body block. */
12903 block = BLOCK_SUBBLOCKS (block);
12907 /* If FNDECL is a class's key method, add the class to the list of
12908 keyed classes that should be emitted. */
12911 record_key_method_defined (tree fndecl)
12913 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12914 && DECL_VIRTUAL_P (fndecl)
12915 && !processing_template_decl)
12917 tree fnclass = DECL_CONTEXT (fndecl);
12918 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12919 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12923 /* Subroutine of finish_function.
12924 Save the body of constexpr functions for possible
12925 future compile time evaluation. */
12928 maybe_save_function_definition (tree fun)
12930 if (!processing_template_decl
12931 && DECL_DECLARED_CONSTEXPR_P (fun)
12932 && !DECL_CLONED_FUNCTION_P (fun))
12933 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
12936 /* Finish up a function declaration and compile that function
12937 all the way to assembler language output. The free the storage
12938 for the function definition.
12940 FLAGS is a bitwise or of the following values:
12942 We just finished processing the body of an in-class inline
12943 function definition. (This processing will have taken place
12944 after the class definition is complete.) */
12947 finish_function (int flags)
12949 tree fndecl = current_function_decl;
12950 tree fntype, ctype = NULL_TREE;
12951 int inclass_inline = (flags & 2) != 0;
12953 /* When we get some parse errors, we can end up without a
12954 current_function_decl, so cope. */
12955 if (fndecl == NULL_TREE)
12956 return error_mark_node;
12958 if (c_dialect_objc ())
12959 objc_finish_function ();
12961 gcc_assert (!defer_mark_used_calls);
12962 defer_mark_used_calls = true;
12964 record_key_method_defined (fndecl);
12966 fntype = TREE_TYPE (fndecl);
12968 /* TREE_READONLY (fndecl) = 1;
12969 This caused &foo to be of type ptr-to-const-function
12970 which then got a warning when stored in a ptr-to-function variable. */
12972 gcc_assert (building_stmt_tree ());
12973 /* The current function is being defined, so its DECL_INITIAL should
12974 be set, and unless there's a multiple definition, it should be
12975 error_mark_node. */
12976 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12978 /* For a cloned function, we've already got all the code we need;
12979 there's no need to add any extra bits. */
12980 if (!DECL_CLONED_FUNCTION_P (fndecl))
12982 if (DECL_MAIN_P (current_function_decl))
12986 /* Make it so that `main' always returns 0 by default (or
12989 stmt = finish_return_stmt (integer_one_node);
12991 stmt = finish_return_stmt (integer_zero_node);
12993 /* Hack. We don't want the middle-end to warn that this
12994 return is unreachable, so put the statement on the
12997 location_t linezero = linemap_line_start (line_table, 0, 1);
12998 SET_EXPR_LOCATION (stmt, linezero);
13002 if (use_eh_spec_block (current_function_decl))
13003 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13004 (TREE_TYPE (current_function_decl)),
13005 current_eh_spec_block);
13008 /* If we're saving up tree structure, tie off the function now. */
13009 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13011 finish_fname_decls ();
13013 /* If this function can't throw any exceptions, remember that. */
13014 if (!processing_template_decl
13015 && !cp_function_chain->can_throw
13016 && !flag_non_call_exceptions
13017 && !decl_replaceable_p (fndecl))
13018 TREE_NOTHROW (fndecl) = 1;
13020 /* This must come after expand_function_end because cleanups might
13021 have declarations (from inline functions) that need to go into
13022 this function's blocks. */
13024 /* If the current binding level isn't the outermost binding level
13025 for this function, either there is a bug, or we have experienced
13026 syntax errors and the statement tree is malformed. */
13027 if (current_binding_level->kind != sk_function_parms)
13029 /* Make sure we have already experienced errors. */
13030 gcc_assert (errorcount);
13032 /* Throw away the broken statement tree and extra binding
13034 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13036 while (current_binding_level->kind != sk_function_parms)
13038 if (current_binding_level->kind == sk_class)
13039 pop_nested_class ();
13041 poplevel (0, 0, 0);
13044 poplevel (1, 0, 1);
13046 /* Statements should always be full-expressions at the outermost set
13047 of curly braces for a function. */
13048 gcc_assert (stmts_are_full_exprs_p ());
13050 /* Save constexpr function body before it gets munged by
13051 the NRV transformation. */
13052 maybe_save_function_definition (fndecl);
13054 /* Set up the named return value optimization, if we can. Candidate
13055 variables are selected in check_return_expr. */
13056 if (current_function_return_value)
13058 tree r = current_function_return_value;
13061 if (r != error_mark_node
13062 /* This is only worth doing for fns that return in memory--and
13063 simpler, since we don't have to worry about promoted modes. */
13064 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13065 /* Only allow this for variables declared in the outer scope of
13066 the function so we know that their lifetime always ends with a
13067 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13068 we were to do this optimization in tree-ssa. */
13069 && (outer = outer_curly_brace_block (fndecl))
13070 && chain_member (r, BLOCK_VARS (outer)))
13071 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13073 current_function_return_value = NULL_TREE;
13076 /* Remember that we were in class scope. */
13077 if (current_class_name)
13078 ctype = current_class_type;
13080 /* Must mark the RESULT_DECL as being in this function. */
13081 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13083 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13084 to the FUNCTION_DECL node itself. */
13085 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13087 /* Save away current state, if appropriate. */
13088 if (!processing_template_decl)
13089 save_function_data (fndecl);
13091 /* Complain if there's just no return statement. */
13092 if (warn_return_type
13093 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13094 && !dependent_type_p (TREE_TYPE (fntype))
13095 && !current_function_returns_value && !current_function_returns_null
13096 /* Don't complain if we abort or throw. */
13097 && !current_function_returns_abnormally
13098 /* Don't complain if we are declared noreturn. */
13099 && !TREE_THIS_VOLATILE (fndecl)
13100 && !DECL_NAME (DECL_RESULT (fndecl))
13101 && !TREE_NO_WARNING (fndecl)
13102 /* Structor return values (if any) are set by the compiler. */
13103 && !DECL_CONSTRUCTOR_P (fndecl)
13104 && !DECL_DESTRUCTOR_P (fndecl))
13106 warning (OPT_Wreturn_type,
13107 "no return statement in function returning non-void");
13108 TREE_NO_WARNING (fndecl) = 1;
13111 /* Store the end of the function, so that we get good line number
13112 info for the epilogue. */
13113 cfun->function_end_locus = input_location;
13115 /* Complain about parameters that are only set, but never otherwise used. */
13116 if (warn_unused_but_set_parameter
13117 && !processing_template_decl
13118 && errorcount == unused_but_set_errorcount
13119 && !DECL_CLONED_FUNCTION_P (fndecl))
13123 for (decl = DECL_ARGUMENTS (fndecl);
13125 decl = DECL_CHAIN (decl))
13126 if (TREE_USED (decl)
13127 && TREE_CODE (decl) == PARM_DECL
13128 && !DECL_READ_P (decl)
13129 && DECL_NAME (decl)
13130 && !DECL_ARTIFICIAL (decl)
13131 && !TREE_NO_WARNING (decl)
13132 && !DECL_IN_SYSTEM_HEADER (decl)
13133 && TREE_TYPE (decl) != error_mark_node
13134 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13135 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13136 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13137 warning (OPT_Wunused_but_set_parameter,
13138 "parameter %q+D set but not used", decl);
13139 unused_but_set_errorcount = errorcount;
13142 /* Genericize before inlining. */
13143 if (!processing_template_decl)
13145 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13146 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13147 cp_genericize (fndecl);
13148 /* Clear out the bits we don't need. */
13149 f->x_current_class_ptr = NULL;
13150 f->x_current_class_ref = NULL;
13151 f->x_eh_spec_block = NULL;
13152 f->x_in_charge_parm = NULL;
13153 f->x_vtt_parm = NULL;
13154 f->x_return_value = NULL;
13155 f->bindings = NULL;
13156 f->extern_decl_map = NULL;
13158 /* Clear out the bits we don't need. */
13159 local_names = NULL;
13161 /* We're leaving the context of this function, so zap cfun. It's still in
13162 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13164 current_function_decl = NULL;
13166 /* If this is an in-class inline definition, we may have to pop the
13167 bindings for the template parameters that we added in
13168 maybe_begin_member_template_processing when start_function was
13170 if (inclass_inline)
13171 maybe_end_member_template_processing ();
13173 /* Leave the scope of the class. */
13175 pop_nested_class ();
13180 current_function_decl = NULL_TREE;
13182 defer_mark_used_calls = false;
13183 if (deferred_mark_used_calls)
13188 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13190 VEC_free (tree, gc, deferred_mark_used_calls);
13196 /* Create the FUNCTION_DECL for a function definition.
13197 DECLSPECS and DECLARATOR are the parts of the declaration;
13198 they describe the return type and the name of the function,
13199 but twisted together in a fashion that parallels the syntax of C.
13201 This function creates a binding context for the function body
13202 as well as setting up the FUNCTION_DECL in current_function_decl.
13204 Returns a FUNCTION_DECL on success.
13206 If the DECLARATOR is not suitable for a function (it defines a datum
13207 instead), we return 0, which tells yyparse to report a parse error.
13209 May return void_type_node indicating that this method is actually
13210 a friend. See grokfield for more details.
13212 Came here with a `.pushlevel' .
13214 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13215 CHANGES TO CODE IN `grokfield'. */
13218 grokmethod (cp_decl_specifier_seq *declspecs,
13219 const cp_declarator *declarator, tree attrlist)
13221 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13224 if (fndecl == error_mark_node)
13225 return error_mark_node;
13227 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13229 error ("invalid member function declaration");
13230 return error_mark_node;
13234 cplus_decl_attributes (&fndecl, attrlist, 0);
13236 /* Pass friends other than inline friend functions back. */
13237 if (fndecl == void_type_node)
13240 if (DECL_IN_AGGR_P (fndecl))
13242 if (DECL_CLASS_SCOPE_P (fndecl))
13243 error ("%qD is already defined in class %qT", fndecl,
13244 DECL_CONTEXT (fndecl));
13245 return error_mark_node;
13248 check_template_shadow (fndecl);
13250 DECL_DECLARED_INLINE_P (fndecl) = 1;
13251 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13253 /* We process method specializations in finish_struct_1. */
13254 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13256 fndecl = push_template_decl (fndecl);
13257 if (fndecl == error_mark_node)
13261 if (! DECL_FRIEND_P (fndecl))
13263 if (DECL_CHAIN (fndecl))
13265 fndecl = copy_node (fndecl);
13266 TREE_CHAIN (fndecl) = NULL_TREE;
13270 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13272 DECL_IN_AGGR_P (fndecl) = 1;
13277 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13278 we can lay it out later, when and if its type becomes complete. */
13281 maybe_register_incomplete_var (tree var)
13283 gcc_assert (TREE_CODE (var) == VAR_DECL);
13285 /* Keep track of variables with incomplete types. */
13286 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13287 && DECL_EXTERNAL (var))
13289 tree inner_type = TREE_TYPE (var);
13291 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13292 inner_type = TREE_TYPE (inner_type);
13293 inner_type = TYPE_MAIN_VARIANT (inner_type);
13295 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13296 /* RTTI TD entries are created while defining the type_info. */
13297 || (TYPE_LANG_SPECIFIC (inner_type)
13298 && TYPE_BEING_DEFINED (inner_type)))
13301 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13303 iv->incomplete_type = inner_type;
13308 /* Called when a class type (given by TYPE) is defined. If there are
13309 any existing VAR_DECLs whose type has been completed by this
13310 declaration, update them now. */
13313 complete_vars (tree type)
13316 incomplete_var *iv;
13318 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13320 if (same_type_p (type, iv->incomplete_type))
13322 tree var = iv->decl;
13323 tree type = TREE_TYPE (var);
13324 /* Complete the type of the variable. The VAR_DECL itself
13325 will be laid out in expand_expr. */
13326 complete_type (type);
13327 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13328 /* Remove this entry from the list. */
13329 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13335 /* Check for pending declarations which may have abstract type. */
13336 complete_type_check_abstract (type);
13339 /* If DECL is of a type which needs a cleanup, build and return an
13340 expression to perform that cleanup here. Return NULL_TREE if no
13341 cleanup need be done. */
13344 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13350 /* Assume no cleanup is required. */
13351 cleanup = NULL_TREE;
13353 if (error_operand_p (decl))
13356 /* Handle "__attribute__((cleanup))". We run the cleanup function
13357 before the destructor since the destructor is what actually
13358 terminates the lifetime of the object. */
13359 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13366 /* Get the name specified by the user for the cleanup function. */
13367 id = TREE_VALUE (TREE_VALUE (attr));
13368 /* Look up the name to find the cleanup function to call. It is
13369 important to use lookup_name here because that is what is
13370 used in c-common.c:handle_cleanup_attribute when performing
13371 initial checks on the attribute. Note that those checks
13372 include ensuring that the function found is not an overloaded
13373 function, or an object with an overloaded call operator,
13374 etc.; we can rely on the fact that the function found is an
13375 ordinary FUNCTION_DECL. */
13376 fn = lookup_name (id);
13377 arg = build_address (decl);
13379 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13380 if (cleanup == error_mark_node)
13381 return error_mark_node;
13383 /* Handle ordinary C++ destructors. */
13384 type = TREE_TYPE (decl);
13385 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13387 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13388 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13389 && CLASSTYPE_VBASECLASSES (type));
13393 if (TREE_CODE (type) == ARRAY_TYPE)
13396 addr = build_address (decl);
13398 /* Optimize for space over speed here. */
13399 if (!has_vbases || flag_expensive_optimizations)
13400 flags |= LOOKUP_NONVIRTUAL;
13402 call = build_delete (TREE_TYPE (addr), addr,
13403 sfk_complete_destructor, flags, 0, complain);
13404 if (call == error_mark_node)
13405 cleanup = error_mark_node;
13407 cleanup = cp_build_compound_expr (cleanup, call, complain);
13415 /* When a stmt has been parsed, this function is called. */
13422 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13423 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13424 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13427 static_fn_type (tree memfntype)
13432 if (TYPE_PTRMEMFUNC_P (memfntype))
13433 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13434 if (POINTER_TYPE_P (memfntype)
13435 || TREE_CODE (memfntype) == FUNCTION_DECL)
13436 memfntype = TREE_TYPE (memfntype);
13437 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13439 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13440 args = TYPE_ARG_TYPES (memfntype);
13441 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13442 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13443 fntype = (cp_build_type_attribute_variant
13444 (fntype, TYPE_ATTRIBUTES (memfntype)));
13445 fntype = (build_exception_variant
13446 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13450 /* DECL was originally constructed as a non-static member function,
13451 but turned out to be static. Update it accordingly. */
13454 revert_static_member_fn (tree decl)
13456 tree stype = static_fn_type (decl);
13458 if (type_memfn_quals (stype) != TYPE_UNQUALIFIED)
13460 error ("static member function %q#D declared with type qualifiers", decl);
13461 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13463 TREE_TYPE (decl) = stype;
13465 if (DECL_ARGUMENTS (decl))
13466 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13467 DECL_STATIC_FUNCTION_P (decl) = 1;
13470 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13471 one of the language-independent trees. */
13473 enum cp_tree_node_structure_enum
13474 cp_tree_node_structure (union lang_tree_node * t)
13476 switch (TREE_CODE (&t->generic))
13478 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13479 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13480 case OVERLOAD: return TS_CP_OVERLOAD;
13481 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13482 case PTRMEM_CST: return TS_CP_PTRMEM;
13483 case BASELINK: return TS_CP_BASELINK;
13484 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13485 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13486 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13487 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13488 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13489 default: return TS_CP_GENERIC;
13493 /* Build the void_list_node (void_type_node having been created). */
13495 build_void_list_node (void)
13497 tree t = build_tree_list (NULL_TREE, void_type_node);
13502 cp_missing_noreturn_ok_p (tree decl)
13504 /* A missing noreturn is ok for the `main' function. */
13505 return DECL_MAIN_P (decl);
13508 /* Return the COMDAT group into which DECL should be placed. */
13511 cxx_comdat_group (tree decl)
13515 /* Virtual tables, construction virtual tables, and virtual table
13516 tables all go in a single COMDAT group, named after the primary
13518 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13519 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13520 /* For all other DECLs, the COMDAT group is the mangled name of the
13521 declaration itself. */
13524 while (DECL_THUNK_P (decl))
13526 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13527 into the same section as the target function. In that case
13528 we must return target's name. */
13529 tree target = THUNK_TARGET (decl);
13530 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13531 && DECL_SECTION_NAME (target) != NULL
13532 && DECL_ONE_ONLY (target))
13537 name = DECL_ASSEMBLER_NAME (decl);
13543 #include "gt-cp-decl.h"