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 = 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 = 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 then 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 else if (new_defines_function && DECL_INITIAL (olddecl))
2058 /* Never inline re-defined extern inline functions.
2059 FIXME: this could be better handled by keeping both
2060 function as separate declarations. */
2061 DECL_UNINLINABLE (newdecl) = 1;
2065 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2066 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2068 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2070 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2071 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2073 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2074 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2075 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2076 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2079 /* Preserve abstractness on cloned [cd]tors. */
2080 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2082 /* Update newdecl's parms to point at olddecl. */
2083 for (parm = DECL_ARGUMENTS (newdecl); parm;
2084 parm = DECL_CHAIN (parm))
2085 DECL_CONTEXT (parm) = olddecl;
2089 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2090 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2091 COPY_DECL_RTL (newdecl, olddecl);
2093 if (! types_match || new_defines_function)
2095 /* These need to be copied so that the names are available.
2096 Note that if the types do match, we'll preserve inline
2097 info and other bits, but if not, we won't. */
2098 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2099 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2101 if (new_defines_function)
2102 /* If defining a function declared with other language
2103 linkage, use the previously declared language linkage. */
2104 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2105 else if (types_match)
2107 /* If redeclaring a builtin function, and not a definition,
2108 it stays built in. */
2109 if (DECL_BUILT_IN (olddecl))
2111 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2112 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2113 /* If we're keeping the built-in definition, keep the rtl,
2114 regardless of declaration matches. */
2115 COPY_DECL_RTL (olddecl, newdecl);
2118 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2119 /* Don't clear out the arguments if we're just redeclaring a
2121 if (DECL_ARGUMENTS (olddecl))
2122 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2125 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2126 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2128 /* Now preserve various other info from the definition. */
2129 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2130 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2131 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2132 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2134 /* Warn about conflicting visibility specifications. */
2135 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2136 && DECL_VISIBILITY_SPECIFIED (newdecl)
2137 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2139 warning_at (input_location, OPT_Wattributes,
2140 "%q+D: visibility attribute ignored because it", newdecl);
2141 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2142 "conflicts with previous declaration here");
2144 /* Choose the declaration which specified visibility. */
2145 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2147 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2148 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2150 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2151 so keep this behavior. */
2152 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2154 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2155 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2157 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2158 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2159 if (TREE_CODE (newdecl) == FIELD_DECL)
2160 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2162 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2163 with that from NEWDECL below. */
2164 if (DECL_LANG_SPECIFIC (olddecl))
2166 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2167 != DECL_LANG_SPECIFIC (newdecl));
2168 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2171 /* Merge the USED information. */
2172 if (TREE_USED (olddecl))
2173 TREE_USED (newdecl) = 1;
2174 else if (TREE_USED (newdecl))
2175 TREE_USED (olddecl) = 1;
2176 if (TREE_CODE (newdecl) == VAR_DECL)
2178 if (DECL_READ_P (olddecl))
2179 DECL_READ_P (newdecl) = 1;
2180 else if (DECL_READ_P (newdecl))
2181 DECL_READ_P (olddecl) = 1;
2183 if (DECL_PRESERVE_P (olddecl))
2184 DECL_PRESERVE_P (newdecl) = 1;
2185 else if (DECL_PRESERVE_P (newdecl))
2186 DECL_PRESERVE_P (olddecl) = 1;
2188 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2192 function_size = sizeof (struct tree_decl_common);
2194 memcpy ((char *) olddecl + sizeof (struct tree_common),
2195 (char *) newdecl + sizeof (struct tree_common),
2196 function_size - sizeof (struct tree_common));
2198 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2199 (char *) newdecl + sizeof (struct tree_decl_common),
2200 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2201 if (new_template_info)
2202 /* If newdecl is a template instantiation, it is possible that
2203 the following sequence of events has occurred:
2205 o A friend function was declared in a class template. The
2206 class template was instantiated.
2208 o The instantiation of the friend declaration was
2209 recorded on the instantiation list, and is newdecl.
2211 o Later, however, instantiate_class_template called pushdecl
2212 on the newdecl to perform name injection. But, pushdecl in
2213 turn called duplicate_decls when it discovered that another
2214 declaration of a global function with the same name already
2217 o Here, in duplicate_decls, we decided to clobber newdecl.
2219 If we're going to do that, we'd better make sure that
2220 olddecl, and not newdecl, is on the list of
2221 instantiations so that if we try to do the instantiation
2222 again we won't get the clobbered declaration. */
2223 reregister_specialization (newdecl,
2229 size_t size = tree_code_size (TREE_CODE (olddecl));
2230 memcpy ((char *) olddecl + sizeof (struct tree_common),
2231 (char *) newdecl + sizeof (struct tree_common),
2232 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2233 switch (TREE_CODE (olddecl))
2243 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2244 (char *) newdecl + sizeof (struct tree_decl_common),
2245 size - sizeof (struct tree_decl_common)
2246 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2250 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2251 (char *) newdecl + sizeof (struct tree_decl_common),
2252 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2253 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2257 DECL_UID (olddecl) = olddecl_uid;
2259 DECL_FRIEND_P (olddecl) = 1;
2262 DECL_ANTICIPATED (olddecl) = 1;
2263 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2266 /* NEWDECL contains the merged attribute lists.
2267 Update OLDDECL to be the same. */
2268 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2270 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2271 so that encode_section_info has a chance to look at the new decl
2272 flags and attributes. */
2273 if (DECL_RTL_SET_P (olddecl)
2274 && (TREE_CODE (olddecl) == FUNCTION_DECL
2275 || (TREE_CODE (olddecl) == VAR_DECL
2276 && TREE_STATIC (olddecl))))
2277 make_decl_rtl (olddecl);
2279 /* The NEWDECL will no longer be needed. Because every out-of-class
2280 declaration of a member results in a call to duplicate_decls,
2281 freeing these nodes represents in a significant savings. */
2287 /* Return zero if the declaration NEWDECL is valid
2288 when the declaration OLDDECL (assumed to be for the same name)
2289 has already been seen.
2290 Otherwise return an error message format string with a %s
2291 where the identifier should go. */
2294 redeclaration_error_message (tree newdecl, tree olddecl)
2296 if (TREE_CODE (newdecl) == TYPE_DECL)
2298 /* Because C++ can put things into name space for free,
2299 constructs like "typedef struct foo { ... } foo"
2300 would look like an erroneous redeclaration. */
2301 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2304 return G_("redefinition of %q#D");
2306 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2308 /* If this is a pure function, its olddecl will actually be
2309 the original initialization to `0' (which we force to call
2310 abort()). Don't complain about redefinition in this case. */
2311 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2312 && DECL_INITIAL (olddecl) == NULL_TREE)
2315 /* If both functions come from different namespaces, this is not
2316 a redeclaration - this is a conflict with a used function. */
2317 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2318 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2319 && ! decls_match (olddecl, newdecl))
2320 return G_("%qD conflicts with used function");
2322 /* We'll complain about linkage mismatches in
2323 warn_extern_redeclared_static. */
2325 /* Defining the same name twice is no good. */
2326 if (DECL_INITIAL (olddecl) != NULL_TREE
2327 && DECL_INITIAL (newdecl) != NULL_TREE)
2329 if (DECL_NAME (olddecl) == NULL_TREE)
2330 return G_("%q#D not declared in class");
2331 else if (!GNU_INLINE_P (olddecl)
2332 || GNU_INLINE_P (newdecl))
2333 return G_("redefinition of %q#D");
2336 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2338 bool olda = GNU_INLINE_P (olddecl);
2339 bool newa = GNU_INLINE_P (newdecl);
2344 return G_("%q+D redeclared inline with "
2345 "%<gnu_inline%> attribute");
2347 return G_("%q+D redeclared inline without "
2348 "%<gnu_inline%> attribute");
2354 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2358 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2360 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2361 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2362 return G_("redefinition of %q#D");
2366 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2367 || (DECL_TEMPLATE_RESULT (newdecl)
2368 == DECL_TEMPLATE_RESULT (olddecl)))
2371 nt = DECL_TEMPLATE_RESULT (newdecl);
2372 if (DECL_TEMPLATE_INFO (nt))
2373 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2374 ot = DECL_TEMPLATE_RESULT (olddecl);
2375 if (DECL_TEMPLATE_INFO (ot))
2376 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2377 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2378 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2379 return G_("redefinition of %q#D");
2381 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2383 bool olda = GNU_INLINE_P (ot);
2384 bool newa = GNU_INLINE_P (nt);
2389 return G_("%q+D redeclared inline with "
2390 "%<gnu_inline%> attribute");
2392 return G_("%q+D redeclared inline without "
2393 "%<gnu_inline%> attribute");
2397 /* Core issue #226 (C++0x):
2399 If a friend function template declaration specifies a
2400 default template-argument, that declaration shall be a
2401 definition and shall be the only declaration of the
2402 function template in the translation unit. */
2403 if ((cxx_dialect != cxx98)
2404 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2405 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2406 /*is_primary=*/1, /*is_partial=*/0,
2407 /*is_friend_decl=*/2))
2408 return G_("redeclaration of friend %q#D "
2409 "may not have default template arguments");
2413 else if (TREE_CODE (newdecl) == VAR_DECL
2414 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2415 && (! DECL_LANG_SPECIFIC (olddecl)
2416 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2417 || DECL_THREAD_LOCAL_P (newdecl)))
2419 /* Only variables can be thread-local, and all declarations must
2420 agree on this property. */
2421 if (DECL_THREAD_LOCAL_P (newdecl))
2422 return G_("thread-local declaration of %q#D follows "
2423 "non-thread-local declaration");
2425 return G_("non-thread-local declaration of %q#D follows "
2426 "thread-local declaration");
2428 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2430 /* The objects have been declared at namespace scope. If either
2431 is a member of an anonymous union, then this is an invalid
2432 redeclaration. For example:
2438 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2439 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2440 return G_("redeclaration of %q#D");
2441 /* If at least one declaration is a reference, there is no
2442 conflict. For example:
2448 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2450 /* Reject two definitions. */
2451 return G_("redefinition of %q#D");
2455 /* Objects declared with block scope: */
2456 /* Reject two definitions, and reject a definition
2457 together with an external reference. */
2458 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2459 return G_("redeclaration of %q#D");
2464 /* Hash and equality functions for the named_label table. */
2467 named_label_entry_hash (const void *data)
2469 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2470 return DECL_UID (ent->label_decl);
2474 named_label_entry_eq (const void *a, const void *b)
2476 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2477 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2478 return ent_a->label_decl == ent_b->label_decl;
2481 /* Create a new label, named ID. */
2484 make_label_decl (tree id, int local_p)
2486 struct named_label_entry *ent;
2490 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2492 DECL_CONTEXT (decl) = current_function_decl;
2493 DECL_MODE (decl) = VOIDmode;
2494 C_DECLARED_LABEL_FLAG (decl) = local_p;
2496 /* Say where one reference is to the label, for the sake of the
2497 error if it is not defined. */
2498 DECL_SOURCE_LOCATION (decl) = input_location;
2500 /* Record the fact that this identifier is bound to this label. */
2501 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2503 /* Create the label htab for the function on demand. */
2505 named_labels = htab_create_ggc (13, named_label_entry_hash,
2506 named_label_entry_eq, NULL);
2508 /* Record this label on the list of labels used in this function.
2509 We do this before calling make_label_decl so that we get the
2510 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2511 ent = ggc_alloc_cleared_named_label_entry ();
2512 ent->label_decl = decl;
2514 slot = htab_find_slot (named_labels, ent, INSERT);
2515 gcc_assert (*slot == NULL);
2521 /* Look for a label named ID in the current function. If one cannot
2522 be found, create one. (We keep track of used, but undefined,
2523 labels, and complain about them at the end of a function.) */
2526 lookup_label (tree id)
2530 timevar_push (TV_NAME_LOOKUP);
2531 /* You can't use labels at global scope. */
2532 if (current_function_decl == NULL_TREE)
2534 error ("label %qE referenced outside of any function", id);
2535 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2538 /* See if we've already got this label. */
2539 decl = IDENTIFIER_LABEL_VALUE (id);
2540 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2541 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2543 decl = make_label_decl (id, /*local_p=*/0);
2544 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2547 /* Declare a local label named ID. */
2550 declare_local_label (tree id)
2553 cp_label_binding *bind;
2555 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2556 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2557 bind = VEC_safe_push (cp_label_binding, gc,
2558 current_binding_level->shadowed_labels, NULL);
2559 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2561 decl = make_label_decl (id, /*local_p=*/1);
2567 /* Returns nonzero if it is ill-formed to jump past the declaration of
2568 DECL. Returns 2 if it's also a real problem. */
2571 decl_jump_unsafe (tree decl)
2573 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2574 with automatic storage duration is not in scope to a point where it is
2575 in scope is ill-formed unless the variable has scalar type, class type
2576 with a trivial default constructor and a trivial destructor, a
2577 cv-qualified version of one of these types, or an array of one of the
2578 preceding types and is declared without an initializer (8.5). */
2579 tree type = TREE_TYPE (decl);
2581 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2582 || type == error_mark_node)
2585 type = strip_array_types (type);
2587 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2588 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2591 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2597 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2600 identify_goto (tree decl, const location_t *locus)
2603 permerror (input_location, "jump to label %qD", decl);
2605 permerror (input_location, "jump to case label");
2607 permerror (*locus, " from here");
2610 /* Check that a single previously seen jump to a newly defined label
2611 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2612 the jump context; NAMES are the names in scope in LEVEL at the jump
2613 context; LOCUS is the source position of the jump or 0. Returns
2614 true if all is well. */
2617 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2618 bool exited_omp, const location_t *locus)
2620 struct cp_binding_level *b;
2621 bool identified = false, saw_eh = false, saw_omp = false;
2625 identify_goto (decl, locus);
2626 error (" exits OpenMP structured block");
2627 identified = saw_omp = true;
2630 for (b = current_binding_level; b ; b = b->level_chain)
2632 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2634 for (new_decls = b->names; new_decls != old_decls;
2635 new_decls = DECL_CHAIN (new_decls))
2637 int problem = decl_jump_unsafe (new_decls);
2643 identify_goto (decl, locus);
2647 error (" crosses initialization of %q+#D", new_decls);
2649 permerror (input_location, " enters scope of %q+#D which has "
2650 "non-trivial destructor", new_decls);
2655 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2659 identify_goto (decl, locus);
2662 if (b->kind == sk_try)
2663 error (" enters try block");
2665 error (" enters catch block");
2668 if (b->kind == sk_omp && !saw_omp)
2672 identify_goto (decl, locus);
2675 error (" enters OpenMP structured block");
2684 check_previous_goto (tree decl, struct named_label_use_entry *use)
2686 check_previous_goto_1 (decl, use->binding_level,
2687 use->names_in_scope, use->in_omp_scope,
2688 &use->o_goto_locus);
2692 check_switch_goto (struct cp_binding_level* level)
2694 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2697 /* Check that a new jump to a label DECL is OK. Called by
2698 finish_goto_stmt. */
2701 check_goto (tree decl)
2703 struct named_label_entry *ent, dummy;
2704 bool saw_catch = false, identified = false;
2708 /* We can't know where a computed goto is jumping.
2709 So we assume that it's OK. */
2710 if (TREE_CODE (decl) != LABEL_DECL)
2713 /* We didn't record any information about this label when we created it,
2714 and there's not much point since it's trivial to analyze as a return. */
2715 if (decl == cdtor_label)
2718 dummy.label_decl = decl;
2719 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2720 gcc_assert (ent != NULL);
2722 /* If the label hasn't been defined yet, defer checking. */
2723 if (! DECL_INITIAL (decl))
2725 struct named_label_use_entry *new_use;
2727 /* Don't bother creating another use if the last goto had the
2728 same data, and will therefore create the same set of errors. */
2730 && ent->uses->names_in_scope == current_binding_level->names)
2733 new_use = ggc_alloc_named_label_use_entry ();
2734 new_use->binding_level = current_binding_level;
2735 new_use->names_in_scope = current_binding_level->names;
2736 new_use->o_goto_locus = input_location;
2737 new_use->in_omp_scope = false;
2739 new_use->next = ent->uses;
2740 ent->uses = new_use;
2744 if (ent->in_try_scope || ent->in_catch_scope
2745 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2747 permerror (input_location, "jump to label %q+D", decl);
2748 permerror (input_location, " from here");
2752 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2754 int u = decl_jump_unsafe (bad);
2756 if (u > 1 && DECL_ARTIFICIAL (bad))
2758 /* Can't skip init of __exception_info. */
2759 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2763 error (" skips initialization of %q+#D", bad);
2765 permerror (input_location, " enters scope of %q+#D which has "
2766 "non-trivial destructor", bad);
2769 if (ent->in_try_scope)
2770 error (" enters try block");
2771 else if (ent->in_catch_scope && !saw_catch)
2772 error (" enters catch block");
2774 if (ent->in_omp_scope)
2775 error (" enters OpenMP structured block");
2776 else if (flag_openmp)
2778 struct cp_binding_level *b;
2779 for (b = current_binding_level; b ; b = b->level_chain)
2781 if (b == ent->binding_level)
2783 if (b->kind == sk_omp)
2787 permerror (input_location, "jump to label %q+D", decl);
2788 permerror (input_location, " from here");
2791 error (" exits OpenMP structured block");
2798 /* Check that a return is ok wrt OpenMP structured blocks.
2799 Called by finish_return_stmt. Returns true if all is well. */
2802 check_omp_return (void)
2804 struct cp_binding_level *b;
2805 for (b = current_binding_level; b ; b = b->level_chain)
2806 if (b->kind == sk_omp)
2808 error ("invalid exit from OpenMP structured block");
2814 /* Define a label, specifying the location in the source file.
2815 Return the LABEL_DECL node for the label. */
2818 define_label (location_t location, tree name)
2820 struct named_label_entry *ent, dummy;
2821 struct cp_binding_level *p;
2824 timevar_push (TV_NAME_LOOKUP);
2826 decl = lookup_label (name);
2828 dummy.label_decl = decl;
2829 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2830 gcc_assert (ent != NULL);
2832 /* After labels, make any new cleanups in the function go into their
2833 own new (temporary) binding contour. */
2834 for (p = current_binding_level;
2835 p->kind != sk_function_parms;
2837 p->more_cleanups_ok = 0;
2839 if (name == get_identifier ("wchar_t"))
2840 permerror (input_location, "label named wchar_t");
2842 if (DECL_INITIAL (decl) != NULL_TREE)
2844 error ("duplicate label %qD", decl);
2845 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2849 struct named_label_use_entry *use;
2851 /* Mark label as having been defined. */
2852 DECL_INITIAL (decl) = error_mark_node;
2853 /* Say where in the source. */
2854 DECL_SOURCE_LOCATION (decl) = location;
2856 ent->binding_level = current_binding_level;
2857 ent->names_in_scope = current_binding_level->names;
2859 for (use = ent->uses; use ; use = use->next)
2860 check_previous_goto (decl, use);
2864 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2869 struct cp_binding_level *level;
2870 struct cp_switch *next;
2871 /* The SWITCH_STMT being built. */
2873 /* A splay-tree mapping the low element of a case range to the high
2874 element, or NULL_TREE if there is no high element. Used to
2875 determine whether or not a new case label duplicates an old case
2876 label. We need a tree, rather than simply a hash table, because
2877 of the GNU case range extension. */
2881 /* A stack of the currently active switch statements. The innermost
2882 switch statement is on the top of the stack. There is no need to
2883 mark the stack for garbage collection because it is only active
2884 during the processing of the body of a function, and we never
2885 collect at that point. */
2887 static struct cp_switch *switch_stack;
2889 /* Called right after a switch-statement condition is parsed.
2890 SWITCH_STMT is the switch statement being parsed. */
2893 push_switch (tree switch_stmt)
2895 struct cp_switch *p = XNEW (struct cp_switch);
2896 p->level = current_binding_level;
2897 p->next = switch_stack;
2898 p->switch_stmt = switch_stmt;
2899 p->cases = splay_tree_new (case_compare, NULL, NULL);
2906 struct cp_switch *cs = switch_stack;
2907 location_t switch_location;
2909 /* Emit warnings as needed. */
2910 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2911 if (!processing_template_decl)
2912 c_do_switch_warnings (cs->cases, switch_location,
2913 SWITCH_STMT_TYPE (cs->switch_stmt),
2914 SWITCH_STMT_COND (cs->switch_stmt));
2916 splay_tree_delete (cs->cases);
2917 switch_stack = switch_stack->next;
2921 /* Note that we've seen a definition of a case label, and complain if this
2922 is a bad place for one. */
2925 finish_case_label (location_t loc, tree low_value, tree high_value)
2928 struct cp_binding_level *p;
2930 if (processing_template_decl)
2934 /* For templates, just add the case label; we'll do semantic
2935 analysis at instantiation-time. */
2936 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2937 return add_stmt (build_case_label (loc, low_value, high_value, label));
2940 /* Find the condition on which this switch statement depends. */
2941 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2942 if (cond && TREE_CODE (cond) == TREE_LIST)
2943 cond = TREE_VALUE (cond);
2945 if (!check_switch_goto (switch_stack->level))
2946 return error_mark_node;
2949 low_value = cxx_constant_value (low_value);
2951 high_value = cxx_constant_value (high_value);
2953 r = c_add_case_label (loc, switch_stack->cases, cond,
2954 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2955 low_value, high_value);
2957 /* After labels, make any new cleanups in the function go into their
2958 own new (temporary) binding contour. */
2959 for (p = current_binding_level;
2960 p->kind != sk_function_parms;
2962 p->more_cleanups_ok = 0;
2967 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2970 typename_hash (const void* k)
2973 const_tree const t = (const_tree) k;
2975 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2976 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2981 typedef struct typename_info {
2989 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2990 really of type `typename_info*' */
2993 typename_compare (const void * k1, const void * k2)
2995 const_tree const t1 = (const_tree) k1;
2996 const typename_info *const t2 = (const typename_info *) k2;
2998 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2999 && TYPE_CONTEXT (t1) == t2->scope
3000 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3001 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3002 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3005 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3006 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3008 Returns the new TYPENAME_TYPE. */
3010 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3013 build_typename_type (tree context, tree name, tree fullname,
3014 enum tag_types tag_type)
3022 if (typename_htab == NULL)
3023 typename_htab = htab_create_ggc (61, &typename_hash,
3024 &typename_compare, NULL);
3026 ti.scope = FROB_CONTEXT (context);
3028 ti.template_id = fullname;
3029 ti.enum_p = tag_type == enum_type;
3030 ti.class_p = (tag_type == class_type
3031 || tag_type == record_type
3032 || tag_type == union_type);
3033 hash = (htab_hash_pointer (ti.scope)
3034 ^ htab_hash_pointer (ti.name));
3036 /* See if we already have this type. */
3037 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3042 /* Build the TYPENAME_TYPE. */
3043 t = cxx_make_type (TYPENAME_TYPE);
3044 TYPE_CONTEXT (t) = ti.scope;
3045 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3046 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3047 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3049 /* Build the corresponding TYPE_DECL. */
3050 d = build_decl (input_location, TYPE_DECL, name, t);
3051 TYPE_NAME (TREE_TYPE (d)) = d;
3052 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3053 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3054 DECL_ARTIFICIAL (d) = 1;
3056 /* Store it in the hash table. */
3059 /* TYPENAME_TYPEs must always be compared structurally, because
3060 they may or may not resolve down to another type depending on
3061 the currently open classes. */
3062 SET_TYPE_STRUCTURAL_EQUALITY (t);
3068 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3069 provided to name the type. Returns an appropriate type, unless an
3070 error occurs, in which case error_mark_node is returned. If we
3071 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3072 return that, rather than the _TYPE it corresponds to, in other
3073 cases we look through the type decl. If TF_ERROR is set, complain
3074 about errors, otherwise be quiet. */
3077 make_typename_type (tree context, tree name, enum tag_types tag_type,
3078 tsubst_flags_t complain)
3084 if (name == error_mark_node
3085 || context == NULL_TREE
3086 || context == error_mark_node)
3087 return error_mark_node;
3091 if (!(TYPE_LANG_SPECIFIC (name)
3092 && (CLASSTYPE_IS_TEMPLATE (name)
3093 || CLASSTYPE_USE_TEMPLATE (name))))
3094 name = TYPE_IDENTIFIER (name);
3096 /* Create a TEMPLATE_ID_EXPR for the type. */
3097 name = build_nt (TEMPLATE_ID_EXPR,
3098 CLASSTYPE_TI_TEMPLATE (name),
3099 CLASSTYPE_TI_ARGS (name));
3101 else if (TREE_CODE (name) == TYPE_DECL)
3102 name = DECL_NAME (name);
3106 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3108 name = TREE_OPERAND (name, 0);
3109 if (TREE_CODE (name) == TEMPLATE_DECL)
3110 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3111 else if (TREE_CODE (name) == OVERLOAD)
3113 error ("%qD is not a type", name);
3114 return error_mark_node;
3117 if (TREE_CODE (name) == TEMPLATE_DECL)
3119 error ("%qD used without template parameters", name);
3120 return error_mark_node;
3122 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3123 gcc_assert (TYPE_P (context));
3125 if (!MAYBE_CLASS_TYPE_P (context))
3127 if (complain & tf_error)
3128 error ("%q#T is not a class", context);
3129 return error_mark_node;
3132 /* When the CONTEXT is a dependent type, NAME could refer to a
3133 dependent base class of CONTEXT. But look inside it anyway
3134 if CONTEXT is a currently open scope, in case it refers to a
3135 member of the current instantiation or a non-dependent base;
3136 lookup will stop when we hit a dependent base. */
3137 if (!dependent_scope_p (context))
3138 /* We should only set WANT_TYPE when we're a nested typename type.
3139 Then we can give better diagnostics if we find a non-type. */
3140 t = lookup_field (context, name, 2, /*want_type=*/true);
3144 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3145 return build_typename_type (context, name, fullname, tag_type);
3147 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3151 if (complain & tf_error)
3152 error (want_template ? "no class template named %q#T in %q#T"
3153 : "no type named %q#T in %q#T", name, context);
3154 return error_mark_node;
3157 /* Pull out the template from an injected-class-name (or multiple). */
3159 t = maybe_get_template_decl_from_type_decl (t);
3161 if (TREE_CODE (t) == TREE_LIST)
3163 if (complain & tf_error)
3165 error ("lookup of %qT in %qT is ambiguous", name, context);
3166 print_candidates (t);
3168 return error_mark_node;
3171 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3173 if (complain & tf_error)
3174 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3176 return error_mark_node;
3178 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3180 if (complain & tf_error)
3181 error ("%<typename %T::%D%> names %q#T, which is not a type",
3183 return error_mark_node;
3186 if (complain & tf_error)
3187 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3189 /* If we are currently parsing a template and if T is a typedef accessed
3190 through CONTEXT then we need to remember and check access of T at
3191 template instantiation time. */
3192 add_typedef_to_current_template_for_access_check (t, context, input_location);
3195 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3197 /*entering_scope=*/0,
3198 tf_warning_or_error | tf_user);
3200 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3206 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3207 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3208 in which case error_mark_node is returned.
3210 If PARM_LIST is non-NULL, also make sure that the template parameter
3211 list of TEMPLATE_DECL matches.
3213 If COMPLAIN zero, don't complain about any errors that occur. */
3216 make_unbound_class_template (tree context, tree name, tree parm_list,
3217 tsubst_flags_t complain)
3223 name = TYPE_IDENTIFIER (name);
3224 else if (DECL_P (name))
3225 name = DECL_NAME (name);
3226 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3228 if (!dependent_type_p (context)
3229 || currently_open_class (context))
3231 tree tmpl = NULL_TREE;
3233 if (MAYBE_CLASS_TYPE_P (context))
3234 tmpl = lookup_field (context, name, 0, false);
3236 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3237 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3239 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3241 if (complain & tf_error)
3242 error ("no class template named %q#T in %q#T", name, context);
3243 return error_mark_node;
3247 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3249 if (complain & tf_error)
3251 error ("template parameters do not match template");
3252 error ("%q+D declared here", tmpl);
3254 return error_mark_node;
3257 if (complain & tf_error)
3258 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3263 /* Build the UNBOUND_CLASS_TEMPLATE. */
3264 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3265 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3266 TREE_TYPE (t) = NULL_TREE;
3267 SET_TYPE_STRUCTURAL_EQUALITY (t);
3269 /* Build the corresponding TEMPLATE_DECL. */
3270 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3271 TYPE_NAME (TREE_TYPE (d)) = d;
3272 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3273 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3274 DECL_ARTIFICIAL (d) = 1;
3275 DECL_TEMPLATE_PARMS (d) = parm_list;
3282 /* Push the declarations of builtin types into the namespace.
3283 RID_INDEX is the index of the builtin type in the array
3284 RID_POINTERS. NAME is the name used when looking up the builtin
3285 type. TYPE is the _TYPE node for the builtin type. */
3288 record_builtin_type (enum rid rid_index,
3292 tree rname = NULL_TREE, tname = NULL_TREE;
3293 tree tdecl = NULL_TREE;
3295 if ((int) rid_index < (int) RID_MAX)
3296 rname = ridpointers[(int) rid_index];
3298 tname = get_identifier (name);
3300 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3301 eliminated. Built-in types should not be looked up name; their
3302 names are keywords that the parser can recognize. However, there
3303 is code in c-common.c that uses identifier_global_value to look
3304 up built-in types by name. */
3307 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3308 DECL_ARTIFICIAL (tdecl) = 1;
3309 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3315 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3316 DECL_ARTIFICIAL (tdecl) = 1;
3318 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3321 if (!TYPE_NAME (type))
3322 TYPE_NAME (type) = tdecl;
3325 debug_hooks->type_decl (tdecl, 0);
3328 /* Record one of the standard Java types.
3329 * Declare it as having the given NAME.
3330 * If SIZE > 0, it is the size of one of the integral types;
3331 * otherwise it is the negative of the size of one of the other types. */
3334 record_builtin_java_type (const char* name, int size)
3339 type = build_nonstandard_integer_type (size, 0);
3340 type = build_distinct_type_copy (type);
3342 else if (size > -32)
3345 /* "__java_char" or ""__java_boolean". */
3346 type = build_nonstandard_integer_type (-size, 1);
3347 type = build_distinct_type_copy (type);
3348 /* Get the signed type cached and attached to the unsigned type,
3349 so it doesn't get garbage-collected at "random" times,
3350 causing potential codegen differences out of different UIDs
3351 and different alias set numbers. */
3352 stype = build_nonstandard_integer_type (-size, 0);
3353 stype = build_distinct_type_copy (stype);
3354 TREE_CHAIN (type) = stype;
3355 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3358 { /* "__java_float" or ""__java_double". */
3359 type = make_node (REAL_TYPE);
3360 TYPE_PRECISION (type) = - size;
3363 record_builtin_type (RID_MAX, name, type);
3364 decl = TYPE_NAME (type);
3366 /* Suppress generate debug symbol entries for these types,
3367 since for normal C++ they are just clutter.
3368 However, push_lang_context undoes this if extern "Java" is seen. */
3369 DECL_IGNORED_P (decl) = 1;
3371 TYPE_FOR_JAVA (type) = 1;
3375 /* Push a type into the namespace so that the back ends ignore it. */
3378 record_unknown_type (tree type, const char* name)
3380 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3381 TYPE_DECL, get_identifier (name), type));
3382 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3383 DECL_IGNORED_P (decl) = 1;
3384 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3385 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3386 TYPE_ALIGN (type) = 1;
3387 TYPE_USER_ALIGN (type) = 0;
3388 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3391 /* A string for which we should create an IDENTIFIER_NODE at
3394 typedef struct predefined_identifier
3396 /* The name of the identifier. */
3397 const char *const name;
3398 /* The place where the IDENTIFIER_NODE should be stored. */
3400 /* Nonzero if this is the name of a constructor or destructor. */
3401 const int ctor_or_dtor_p;
3402 } predefined_identifier;
3404 /* Create all the predefined identifiers. */
3407 initialize_predefined_identifiers (void)
3409 const predefined_identifier *pid;
3411 /* A table of identifiers to create at startup. */
3412 static const predefined_identifier predefined_identifiers[] = {
3413 { "C++", &lang_name_cplusplus, 0 },
3414 { "C", &lang_name_c, 0 },
3415 { "Java", &lang_name_java, 0 },
3416 /* Some of these names have a trailing space so that it is
3417 impossible for them to conflict with names written by users. */
3418 { "__ct ", &ctor_identifier, 1 },
3419 { "__base_ctor ", &base_ctor_identifier, 1 },
3420 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3421 { "__dt ", &dtor_identifier, 1 },
3422 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3423 { "__base_dtor ", &base_dtor_identifier, 1 },
3424 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3425 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3426 { "nelts", &nelts_identifier, 0 },
3427 { THIS_NAME, &this_identifier, 0 },
3428 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3429 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3430 { "_vptr", &vptr_identifier, 0 },
3431 { "__vtt_parm", &vtt_parm_identifier, 0 },
3432 { "::", &global_scope_name, 0 },
3433 { "std", &std_identifier, 0 },
3437 for (pid = predefined_identifiers; pid->name; ++pid)
3439 *pid->node = get_identifier (pid->name);
3440 if (pid->ctor_or_dtor_p)
3441 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3445 /* Create the predefined scalar types of C,
3446 and some nodes representing standard constants (0, 1, (void *)0).
3447 Initialize the global binding level.
3448 Make definitions for built-in primitive functions. */
3451 cxx_init_decl_processing (void)
3454 tree void_ftype_ptr;
3456 build_common_tree_nodes (flag_signed_char);
3458 /* Create all the identifiers we need. */
3459 initialize_predefined_identifiers ();
3461 /* Create the global variables. */
3462 push_to_top_level ();
3464 current_function_decl = NULL_TREE;
3465 current_binding_level = NULL;
3466 /* Enter the global namespace. */
3467 gcc_assert (global_namespace == NULL_TREE);
3468 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3470 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3471 TREE_PUBLIC (global_namespace) = 1;
3472 begin_scope (sk_namespace, global_namespace);
3474 current_lang_name = NULL_TREE;
3476 if (flag_visibility_ms_compat)
3477 default_visibility = VISIBILITY_HIDDEN;
3480 current_lang_name = lang_name_c;
3482 /* Create the `std' namespace. */
3483 push_namespace (std_identifier);
3484 std_node = current_namespace;
3487 c_common_nodes_and_builtins ();
3489 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3490 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3491 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3492 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3493 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3494 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3495 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3496 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3498 integer_two_node = build_int_cst (NULL_TREE, 2);
3500 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3501 truthvalue_type_node = boolean_type_node;
3502 truthvalue_false_node = boolean_false_node;
3503 truthvalue_true_node = boolean_true_node;
3505 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3506 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3507 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3510 record_builtin_type (RID_MAX, NULL, string_type_node);
3513 delta_type_node = ptrdiff_type_node;
3514 vtable_index_type = ptrdiff_type_node;
3516 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3517 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3518 void_ftype_ptr = build_function_type_list (void_type_node,
3519 ptr_type_node, NULL_TREE);
3521 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3523 /* C++ extensions */
3525 unknown_type_node = make_node (LANG_TYPE);
3526 record_unknown_type (unknown_type_node, "unknown type");
3528 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3529 TREE_TYPE (unknown_type_node) = unknown_type_node;
3531 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3533 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3534 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3536 init_list_type_node = make_node (LANG_TYPE);
3537 record_unknown_type (init_list_type_node, "init list");
3540 /* Make sure we get a unique function type, so we can give
3541 its pointer type a name. (This wins for gdb.) */
3542 tree vfunc_type = make_node (FUNCTION_TYPE);
3543 TREE_TYPE (vfunc_type) = integer_type_node;
3544 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3545 layout_type (vfunc_type);
3547 vtable_entry_type = build_pointer_type (vfunc_type);
3549 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3552 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3553 layout_type (vtbl_type_node);
3554 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3555 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3556 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3557 layout_type (vtbl_ptr_type_node);
3558 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3560 push_namespace (get_identifier ("__cxxabiv1"));
3561 abi_node = current_namespace;
3564 global_type_node = make_node (LANG_TYPE);
3565 record_unknown_type (global_type_node, "global type");
3568 current_lang_name = lang_name_cplusplus;
3571 tree newtype, deltype;
3572 tree ptr_ftype_sizetype;
3576 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3577 if (cxx_dialect == cxx98)
3580 tree bad_alloc_type_node;
3581 tree bad_alloc_decl;
3583 push_namespace (std_identifier);
3584 bad_alloc_id = get_identifier ("bad_alloc");
3585 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3586 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3588 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3589 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3593 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3596 new_eh_spec = noexcept_false_spec;
3598 newtype = build_exception_variant (ptr_ftype_sizetype, new_eh_spec);
3599 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3600 push_cp_library_fn (NEW_EXPR, newtype);
3601 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3602 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3603 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3605 nullptr_type_node = make_node (NULLPTR_TYPE);
3606 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3607 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3608 TYPE_UNSIGNED (nullptr_type_node) = 1;
3609 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3610 SET_TYPE_MODE (nullptr_type_node, Pmode);
3611 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3612 nullptr_node = build_int_cst (nullptr_type_node, 0);
3616 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3618 /* Perform other language dependent initializations. */
3619 init_class_processing ();
3620 init_rtti_processing ();
3621 init_template_processing ();
3623 if (flag_exceptions)
3624 init_exception_processing ();
3626 if (! supports_one_only ())
3629 make_fname_decl = cp_make_fname_decl;
3630 start_fname_decls ();
3632 /* Show we use EH for cleanups. */
3633 if (flag_exceptions)
3634 using_eh_for_cleanups ();
3637 /* Generate an initializer for a function naming variable from
3638 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3639 filled in with the type of the init. */
3642 cp_fname_init (const char* name, tree *type_p)
3644 tree domain = NULL_TREE;
3646 tree init = NULL_TREE;
3651 length = strlen (name);
3652 domain = build_index_type (size_int (length));
3653 init = build_string (length + 1, name);
3656 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3657 type = build_cplus_array_type (type, domain);
3662 TREE_TYPE (init) = type;
3664 init = error_mark_node;
3669 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3670 the decl, LOC is the location to give the decl, NAME is the
3671 initialization string and TYPE_DEP indicates whether NAME depended
3672 on the type of the function. We make use of that to detect
3673 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3674 at the point of first use, so we mustn't push the decl now. */
3677 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3679 const char *const name = (type_dep && processing_template_decl
3680 ? NULL : fname_as_string (type_dep));
3682 tree init = cp_fname_init (name, &type);
3683 tree decl = build_decl (loc, VAR_DECL, id, type);
3686 free (CONST_CAST (char *, name));
3688 /* As we're using pushdecl_with_scope, we must set the context. */
3689 DECL_CONTEXT (decl) = current_function_decl;
3690 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3692 TREE_STATIC (decl) = 1;
3693 TREE_READONLY (decl) = 1;
3694 DECL_ARTIFICIAL (decl) = 1;
3696 TREE_USED (decl) = 1;
3698 if (current_function_decl)
3700 struct cp_binding_level *b = current_binding_level;
3701 if (b->kind == sk_function_parms)
3702 return error_mark_node;
3703 while (b->level_chain->kind != sk_function_parms)
3705 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3706 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3707 LOOKUP_ONLYCONVERTING);
3711 DECL_THIS_STATIC (decl) = true;
3712 pushdecl_top_level_and_finish (decl, init);
3719 builtin_function_1 (tree decl, tree context, bool is_global)
3721 tree id = DECL_NAME (decl);
3722 const char *name = IDENTIFIER_POINTER (id);
3724 retrofit_lang_decl (decl);
3726 DECL_ARTIFICIAL (decl) = 1;
3727 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3728 SET_DECL_LANGUAGE (decl, lang_c);
3729 /* Runtime library routines are, by definition, available in an
3730 external shared object. */
3731 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3732 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3734 DECL_CONTEXT (decl) = context;
3737 pushdecl_top_level (decl);
3741 /* A function in the user's namespace should have an explicit
3742 declaration before it is used. Mark the built-in function as
3743 anticipated but not actually declared. */
3744 if (name[0] != '_' || name[1] != '_')
3745 DECL_ANTICIPATED (decl) = 1;
3746 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3748 size_t len = strlen (name);
3750 /* Treat __*_chk fortification functions as anticipated as well,
3751 unless they are __builtin_*. */
3752 if (len > strlen ("___chk")
3753 && memcmp (name + len - strlen ("_chk"),
3754 "_chk", strlen ("_chk") + 1) == 0)
3755 DECL_ANTICIPATED (decl) = 1;
3762 cxx_builtin_function (tree decl)
3764 tree id = DECL_NAME (decl);
3765 const char *name = IDENTIFIER_POINTER (id);
3766 /* All builtins that don't begin with an '_' should additionally
3767 go in the 'std' namespace. */
3770 tree decl2 = copy_node(decl);
3771 push_namespace (std_identifier);
3772 builtin_function_1 (decl2, std_node, false);
3776 return builtin_function_1 (decl, NULL_TREE, false);
3779 /* Like cxx_builtin_function, but guarantee the function is added to the global
3780 scope. This is to allow function specific options to add new machine
3781 dependent builtins when the target ISA changes via attribute((target(...)))
3782 which saves space on program startup if the program does not use non-generic
3786 cxx_builtin_function_ext_scope (tree decl)
3789 tree id = DECL_NAME (decl);
3790 const char *name = IDENTIFIER_POINTER (id);
3791 /* All builtins that don't begin with an '_' should additionally
3792 go in the 'std' namespace. */
3795 tree decl2 = copy_node(decl);
3796 push_namespace (std_identifier);
3797 builtin_function_1 (decl2, std_node, true);
3801 return builtin_function_1 (decl, NULL_TREE, true);
3804 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3805 function. Not called directly. */
3808 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3810 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3811 DECL_EXTERNAL (fn) = 1;
3812 TREE_PUBLIC (fn) = 1;
3813 DECL_ARTIFICIAL (fn) = 1;
3814 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3815 SET_DECL_LANGUAGE (fn, lang_c);
3816 /* Runtime library routines are, by definition, available in an
3817 external shared object. */
3818 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3819 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3823 /* Returns the _DECL for a library function with C linkage.
3824 We assume that such functions never throw; if this is incorrect,
3825 callers should unset TREE_NOTHROW. */
3828 build_library_fn (tree name, tree type)
3830 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3831 TREE_NOTHROW (fn) = 1;
3835 /* Returns the _DECL for a library function with C++ linkage. */
3838 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3840 tree fn = build_library_fn_1 (name, operator_code, type);
3841 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3842 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3843 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3847 /* Like build_library_fn, but takes a C string instead of an
3851 build_library_fn_ptr (const char* name, tree type)
3853 return build_library_fn (get_identifier (name), type);
3856 /* Like build_cp_library_fn, but takes a C string instead of an
3860 build_cp_library_fn_ptr (const char* name, tree type)
3862 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3865 /* Like build_library_fn, but also pushes the function so that we will
3866 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3867 may throw exceptions listed in RAISES. */
3870 push_library_fn (tree name, tree type, tree raises)
3875 type = build_exception_variant (type, raises);
3877 fn = build_library_fn (name, type);
3878 pushdecl_top_level (fn);
3882 /* Like build_cp_library_fn, but also pushes the function so that it
3883 will be found by normal lookup. */
3886 push_cp_library_fn (enum tree_code operator_code, tree type)
3888 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3895 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3899 push_void_library_fn (tree name, tree parmtypes)
3901 tree type = build_function_type (void_type_node, parmtypes);
3902 return push_library_fn (name, type, NULL_TREE);
3905 /* Like push_library_fn, but also note that this function throws
3906 and does not return. Used for __throw_foo and the like. */
3909 push_throw_library_fn (tree name, tree type)
3911 tree fn = push_library_fn (name, type, NULL_TREE);
3912 TREE_THIS_VOLATILE (fn) = 1;
3913 TREE_NOTHROW (fn) = 0;
3917 /* When we call finish_struct for an anonymous union, we create
3918 default copy constructors and such. But, an anonymous union
3919 shouldn't have such things; this function undoes the damage to the
3920 anonymous union type T.
3922 (The reason that we create the synthesized methods is that we don't
3923 distinguish `union { int i; }' from `typedef union { int i; } U'.
3924 The first is an anonymous union; the second is just an ordinary
3928 fixup_anonymous_aggr (tree t)
3932 /* Wipe out memory of synthesized methods. */
3933 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3934 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3935 TYPE_HAS_COPY_CTOR (t) = 0;
3936 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
3937 TYPE_HAS_COPY_ASSIGN (t) = 0;
3938 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
3940 /* Splice the implicitly generated functions out of the TYPE_METHODS
3942 q = &TYPE_METHODS (t);
3945 if (DECL_ARTIFICIAL (*q))
3946 *q = TREE_CHAIN (*q);
3948 q = &DECL_CHAIN (*q);
3951 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3952 if (TYPE_METHODS (t))
3954 tree decl = TYPE_MAIN_DECL (t);
3956 if (TREE_CODE (t) != UNION_TYPE)
3957 error_at (DECL_SOURCE_LOCATION (decl),
3958 "an anonymous struct cannot have function members");
3960 error_at (DECL_SOURCE_LOCATION (decl),
3961 "an anonymous union cannot have function members");
3964 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3965 assignment operators (because they cannot have these methods themselves).
3966 For anonymous unions this is already checked because they are not allowed
3967 in any union, otherwise we have to check it. */
3968 if (TREE_CODE (t) != UNION_TYPE)
3972 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
3973 if (TREE_CODE (field) == FIELD_DECL)
3975 type = TREE_TYPE (field);
3976 if (CLASS_TYPE_P (type))
3978 if (TYPE_NEEDS_CONSTRUCTING (type))
3979 error ("member %q+#D with constructor not allowed "
3980 "in anonymous aggregate", field);
3981 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3982 error ("member %q+#D with destructor not allowed "
3983 "in anonymous aggregate", field);
3984 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
3985 error ("member %q+#D with copy assignment operator "
3986 "not allowed in anonymous aggregate", field);
3992 /* Make sure that a declaration with no declarator is well-formed, i.e.
3993 just declares a tagged type or anonymous union.
3995 Returns the type declared; or NULL_TREE if none. */
3998 check_tag_decl (cp_decl_specifier_seq *declspecs)
4000 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4001 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4002 /* If a class, struct, or enum type is declared by the DECLSPECS
4003 (i.e, if a class-specifier, enum-specifier, or non-typename
4004 elaborated-type-specifier appears in the DECLSPECS),
4005 DECLARED_TYPE is set to the corresponding type. */
4006 tree declared_type = NULL_TREE;
4007 bool error_p = false;
4009 if (declspecs->multiple_types_p)
4010 error ("multiple types in one declaration");
4011 else if (declspecs->redefined_builtin_type)
4013 if (!in_system_header)
4014 permerror (input_location, "redeclaration of C++ built-in type %qT",
4015 declspecs->redefined_builtin_type);
4020 && TYPE_P (declspecs->type)
4021 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4022 && MAYBE_CLASS_TYPE_P (declspecs->type))
4023 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4024 declared_type = declspecs->type;
4025 else if (declspecs->type == error_mark_node)
4027 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4028 permerror (input_location, "declaration does not declare anything");
4029 /* Check for an anonymous union. */
4030 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4031 && TYPE_ANONYMOUS_P (declared_type))
4033 /* 7/3 In a simple-declaration, the optional init-declarator-list
4034 can be omitted only when declaring a class (clause 9) or
4035 enumeration (7.2), that is, when the decl-specifier-seq contains
4036 either a class-specifier, an elaborated-type-specifier with
4037 a class-key (9.1), or an enum-specifier. In these cases and
4038 whenever a class-specifier or enum-specifier is present in the
4039 decl-specifier-seq, the identifiers in these specifiers are among
4040 the names being declared by the declaration (as class-name,
4041 enum-names, or enumerators, depending on the syntax). In such
4042 cases, and except for the declaration of an unnamed bit-field (9.6),
4043 the decl-specifier-seq shall introduce one or more names into the
4044 program, or shall redeclare a name introduced by a previous
4045 declaration. [Example:
4046 enum { }; // ill-formed
4047 typedef class { }; // ill-formed
4051 error ("missing type-name in typedef-declaration");
4054 /* Anonymous unions are objects, so they can have specifiers. */;
4055 SET_ANON_AGGR_TYPE_P (declared_type);
4057 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4058 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4063 if (declspecs->specs[(int)ds_inline]
4064 || declspecs->specs[(int)ds_virtual])
4065 error ("%qs can only be specified for functions",
4066 declspecs->specs[(int)ds_inline]
4067 ? "inline" : "virtual");
4069 && (!current_class_type
4070 || current_scope () != current_class_type))
4071 error ("%<friend%> can only be specified inside a class");
4072 else if (declspecs->specs[(int)ds_explicit])
4073 error ("%<explicit%> can only be specified for constructors");
4074 else if (declspecs->storage_class)
4075 error ("a storage class can only be specified for objects "
4077 else if (declspecs->specs[(int)ds_const]
4078 || declspecs->specs[(int)ds_volatile]
4079 || declspecs->specs[(int)ds_restrict]
4080 || declspecs->specs[(int)ds_thread])
4081 error ("qualifiers can only be specified for objects "
4083 else if (saw_typedef)
4084 warning (0, "%<typedef%> was ignored in this declaration");
4085 else if (declspecs->specs[(int) ds_constexpr])
4086 error ("%<constexpr%> cannot be used for type declarations");
4089 return declared_type;
4092 /* Called when a declaration is seen that contains no names to declare.
4093 If its type is a reference to a structure, union or enum inherited
4094 from a containing scope, shadow that tag name for the current scope
4095 with a forward reference.
4096 If its type defines a new named structure or union
4097 or defines an enum, it is valid but we need not do anything here.
4098 Otherwise, it is an error.
4100 C++: may have to grok the declspecs to learn about static,
4101 complain for anonymous unions.
4103 Returns the TYPE declared -- or NULL_TREE if none. */
4106 shadow_tag (cp_decl_specifier_seq *declspecs)
4108 tree t = check_tag_decl (declspecs);
4113 if (declspecs->attributes)
4115 warning (0, "attribute ignored in declaration of %q+#T", t);
4116 warning (0, "attribute for %q+#T must follow the %qs keyword",
4117 t, class_key_or_enum_as_string (t));
4121 if (maybe_process_partial_specialization (t) == error_mark_node)
4124 /* This is where the variables in an anonymous union are
4125 declared. An anonymous union declaration looks like:
4127 because there is no declarator after the union, the parser
4128 sends that declaration here. */
4129 if (ANON_AGGR_TYPE_P (t))
4131 fixup_anonymous_aggr (t);
4133 if (TYPE_FIELDS (t))
4135 tree decl = grokdeclarator (/*declarator=*/NULL,
4136 declspecs, NORMAL, 0, NULL);
4137 finish_anon_union (decl);
4144 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4147 groktypename (cp_decl_specifier_seq *type_specifiers,
4148 const cp_declarator *declarator,
4149 bool is_template_arg)
4153 enum decl_context context
4154 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4155 attrs = type_specifiers->attributes;
4156 type_specifiers->attributes = NULL_TREE;
4157 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4158 if (attrs && type != error_mark_node)
4160 if (CLASS_TYPE_P (type))
4161 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4162 "outside of definition", type);
4163 else if (MAYBE_CLASS_TYPE_P (type))
4164 /* A template type parameter or other dependent type. */
4165 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4166 "type %qT without an associated declaration", type);
4168 cplus_decl_attributes (&type, attrs, 0);
4173 /* Process a DECLARATOR for a function-scope variable declaration,
4174 namespace-scope variable declaration, or function declaration.
4175 (Function definitions go through start_function; class member
4176 declarations appearing in the body of the class go through
4177 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4178 If an error occurs, the error_mark_node is returned instead.
4180 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4181 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4182 for an explicitly defaulted function, or SD_DELETED for an explicitly
4183 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4184 implicitly initialized via a default constructor. ATTRIBUTES and
4185 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4186 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4187 set, the caller is responsible for calling pop_scope. */
4190 start_decl (const cp_declarator *declarator,
4191 cp_decl_specifier_seq *declspecs,
4194 tree prefix_attributes,
4195 tree *pushed_scope_p)
4203 *pushed_scope_p = NULL_TREE;
4205 /* An object declared as __attribute__((deprecated)) suppresses
4206 warnings of uses of other deprecated items. */
4207 if (lookup_attribute ("deprecated", attributes))
4208 deprecated_state = DEPRECATED_SUPPRESS;
4210 attributes = chainon (attributes, prefix_attributes);
4212 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4215 deprecated_state = DEPRECATED_NORMAL;
4217 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4218 || decl == error_mark_node)
4219 return error_mark_node;
4221 context = CP_DECL_CONTEXT (decl);
4222 if (context != global_namespace)
4223 *pushed_scope_p = push_scope (context);
4226 /* Is it valid for this decl to have an initializer at all?
4227 If not, set INITIALIZED to zero, which will indirectly
4228 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4229 switch (TREE_CODE (decl))
4232 error ("typedef %qD is initialized (use decltype instead)", decl);
4233 return error_mark_node;
4236 if (initialized == SD_DELETED)
4237 /* We'll handle the rest of the semantics later, but we need to
4238 set this now so it's visible to duplicate_decls. */
4239 DECL_DELETED_FN (decl) = 1;
4248 if (! toplevel_bindings_p ()
4249 && DECL_EXTERNAL (decl))
4250 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4252 DECL_EXTERNAL (decl) = 0;
4253 if (toplevel_bindings_p ())
4254 TREE_STATIC (decl) = 1;
4256 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4258 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4259 record_key_method_defined (decl);
4261 /* If this is a typedef that names the class for linkage purposes
4262 (7.1.3p8), apply any attributes directly to the type. */
4263 if (TREE_CODE (decl) == TYPE_DECL
4264 && TAGGED_TYPE_P (TREE_TYPE (decl))
4265 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4266 flags = ATTR_FLAG_TYPE_IN_PLACE;
4270 /* Set attributes here so if duplicate decl, will have proper attributes. */
4271 cplus_decl_attributes (&decl, attributes, flags);
4273 /* Dllimported symbols cannot be defined. Static data members (which
4274 can be initialized in-class and dllimported) go through grokfield,
4275 not here, so we don't need to exclude those decls when checking for
4277 if (initialized && DECL_DLLIMPORT_P (decl))
4279 error ("definition of %q#D is marked %<dllimport%>", decl);
4280 DECL_DLLIMPORT_P (decl) = 0;
4283 /* If #pragma weak was used, mark the decl weak now. */
4284 maybe_apply_pragma_weak (decl);
4286 if (TREE_CODE (decl) == FUNCTION_DECL
4287 && DECL_DECLARED_INLINE_P (decl)
4288 && DECL_UNINLINABLE (decl)
4289 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4290 warning (0, "inline function %q+D given attribute noinline", decl);
4292 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4294 if (TREE_CODE (decl) == VAR_DECL)
4296 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4297 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4298 error ("%q#D is not a static member of %q#T", decl, context);
4301 if (DECL_CONTEXT (field) != context)
4303 if (!same_type_p (DECL_CONTEXT (field), context))
4304 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4305 "to be defined as %<%T::%D%>",
4306 DECL_CONTEXT (field), DECL_NAME (decl),
4307 context, DECL_NAME (decl));
4308 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4310 if (processing_specialization
4311 && template_class_depth (context) == 0
4312 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4313 error ("template header not allowed in member definition "
4314 "of explicitly specialized class");
4315 /* Static data member are tricky; an in-class initialization
4316 still doesn't provide a definition, so the in-class
4317 declaration will have DECL_EXTERNAL set, but will have an
4318 initialization. Thus, duplicate_decls won't warn
4319 about this situation, and so we check here. */
4320 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4321 error ("duplicate initialization of %qD", decl);
4322 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4324 if (declspecs->specs[(int) ds_constexpr]
4325 && !DECL_DECLARED_CONSTEXPR_P (field))
4326 error ("%qD declared %<constexpr%> outside its class", field);
4331 tree field = check_classfn (context, decl,
4332 (processing_template_decl
4333 > template_class_depth (context))
4334 ? current_template_parms
4336 if (field && field != error_mark_node
4337 && duplicate_decls (decl, field,
4338 /*newdecl_is_friend=*/false))
4342 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4343 DECL_IN_AGGR_P (decl) = 0;
4344 /* Do not mark DECL as an explicit specialization if it was not
4345 already marked as an instantiation; a declaration should
4346 never be marked as a specialization unless we know what
4347 template is being specialized. */
4348 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4350 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4352 /* [temp.expl.spec] An explicit specialization of a static data
4353 member of a template is a definition if the declaration
4354 includes an initializer; otherwise, it is a declaration.
4356 We check for processing_specialization so this only applies
4357 to the new specialization syntax. */
4358 if (!initialized && processing_specialization)
4359 DECL_EXTERNAL (decl) = 1;
4362 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4363 /* Aliases are definitions. */
4365 permerror (input_location, "declaration of %q#D outside of class is not definition",
4369 was_public = TREE_PUBLIC (decl);
4371 /* Enter this declaration into the symbol table. */
4372 decl = maybe_push_decl (decl);
4374 if (processing_template_decl)
4375 decl = push_template_decl (decl);
4376 if (decl == error_mark_node)
4377 return error_mark_node;
4379 /* Tell the back end to use or not use .common as appropriate. If we say
4380 -fconserve-space, we want this to save .data space, at the expense of
4381 wrong semantics. If we say -fno-conserve-space, we want this to
4382 produce errors about redefs; to do this we force variables into the
4384 if (flag_conserve_space
4385 && TREE_CODE (decl) == VAR_DECL
4386 && TREE_PUBLIC (decl)
4387 && !DECL_THREAD_LOCAL_P (decl)
4388 && !have_global_bss_p ())
4389 DECL_COMMON (decl) = 1;
4391 if (TREE_CODE (decl) == VAR_DECL
4392 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4393 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4395 /* This is a const variable with implicit 'static'. Set
4396 DECL_THIS_STATIC so we can tell it from variables that are
4397 !TREE_PUBLIC because of the anonymous namespace. */
4398 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4399 DECL_THIS_STATIC (decl) = 1;
4402 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4403 start_decl_1 (decl, initialized);
4408 /* Process the declaration of a variable DECL. INITIALIZED is true
4409 iff DECL is explicitly initialized. (INITIALIZED is false if the
4410 variable is initialized via an implicitly-called constructor.)
4411 This function must be called for ordinary variables (including, for
4412 example, implicit instantiations of templates), but must not be
4413 called for template declarations. */
4416 start_decl_1 (tree decl, bool initialized)
4420 bool aggregate_definition_p;
4422 gcc_assert (!processing_template_decl);
4424 if (error_operand_p (decl))
4427 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4429 type = TREE_TYPE (decl);
4430 complete_p = COMPLETE_TYPE_P (type);
4431 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4433 /* If an explicit initializer is present, or if this is a definition
4434 of an aggregate, then we need a complete type at this point.
4435 (Scalars are always complete types, so there is nothing to
4436 check.) This code just sets COMPLETE_P; errors (if necessary)
4437 are issued below. */
4438 if ((initialized || aggregate_definition_p)
4440 && COMPLETE_TYPE_P (complete_type (type)))
4443 /* We will not yet have set TREE_READONLY on DECL if the type
4444 was "const", but incomplete, before this point. But, now, we
4445 have a complete type, so we can try again. */
4446 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4450 /* Is it valid for this decl to have an initializer at all? */
4452 /* Don't allow initializations for incomplete types except for
4453 arrays which might be completed by the initialization. */
4455 ; /* A complete type is ok. */
4456 else if (type_uses_auto (type))
4457 ; /* An auto type is ok. */
4458 else if (TREE_CODE (type) != ARRAY_TYPE)
4460 error ("variable %q#D has initializer but incomplete type", decl);
4461 type = TREE_TYPE (decl) = error_mark_node;
4463 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4465 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4466 error ("elements of array %q#D have incomplete type", decl);
4467 /* else we already gave an error in start_decl. */
4470 else if (aggregate_definition_p && !complete_p)
4472 if (type_uses_auto (type))
4473 error ("declaration of %q#D has no initializer", decl);
4475 error ("aggregate %q#D has incomplete type and cannot be defined",
4477 /* Change the type so that assemble_variable will give
4478 DECL an rtl we can live with: (mem (const_int 0)). */
4479 type = TREE_TYPE (decl) = error_mark_node;
4482 /* Create a new scope to hold this declaration if necessary.
4483 Whether or not a new scope is necessary cannot be determined
4484 until after the type has been completed; if the type is a
4485 specialization of a class template it is not until after
4486 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4487 will be set correctly. */
4488 maybe_push_cleanup_level (type);
4491 /* Handle initialization of references. DECL, TYPE, and INIT have the
4492 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4493 but will be set to a new CLEANUP_STMT if a temporary is created
4494 that must be destroyed subsequently.
4496 Returns an initializer expression to use to initialize DECL, or
4497 NULL if the initialization can be performed statically.
4499 Quotes on semantics can be found in ARM 8.4.3. */
4502 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4506 if (init == NULL_TREE)
4508 if ((DECL_LANG_SPECIFIC (decl) == 0
4509 || DECL_IN_AGGR_P (decl) == 0)
4510 && ! DECL_THIS_EXTERN (decl))
4511 error ("%qD declared as reference but not initialized", decl);
4515 if (TREE_CODE (init) == TREE_LIST)
4516 init = build_x_compound_expr_from_list (init, ELK_INIT,
4517 tf_warning_or_error);
4519 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4520 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4521 /* Note: default conversion is only called in very special cases. */
4522 init = decay_conversion (init);
4524 /* Convert INIT to the reference type TYPE. This may involve the
4525 creation of a temporary, whose lifetime must be the same as that
4526 of the reference. If so, a DECL_EXPR for the temporary will be
4527 added just after the DECL_EXPR for DECL. That's why we don't set
4528 DECL_INITIAL for local references (instead assigning to them
4529 explicitly); we need to allow the temporary to be initialized
4531 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4533 if (tmp == error_mark_node)
4535 else if (tmp == NULL_TREE)
4537 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4541 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4544 DECL_INITIAL (decl) = tmp;
4549 /* Subroutine of check_initializer. We're initializing a DECL of
4550 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4551 extend the lifetime of the underlying array to match that of the decl,
4552 just like for reference initialization. CLEANUP is as for
4553 grok_reference_init. */
4556 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4559 tree aggr_init, array, arrtype;
4560 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4561 if (error_operand_p (init))
4562 return error_mark_node;
4564 aggr_init = TARGET_EXPR_INITIAL (init);
4565 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4566 arrtype = TREE_TYPE (array);
4568 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4569 array = TREE_OPERAND (array, 0);
4570 /* If the array is constant, finish_compound_literal already made it a
4571 static variable and we don't need to do anything here. */
4572 if (decl && TREE_CODE (array) == TARGET_EXPR)
4574 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4575 var = build_address (var);
4576 var = convert (arrtype, var);
4577 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4582 /* Designated initializers in arrays are not supported in GNU C++.
4583 The parser cannot detect this error since it does not know whether
4584 a given brace-enclosed initializer is for a class type or for an
4585 array. This function checks that CE does not use a designated
4586 initializer. If it does, an error is issued. Returns true if CE
4587 is valid, i.e., does not have a designated initializer. */
4590 check_array_designated_initializer (const constructor_elt *ce)
4592 /* Designated initializers for array elements are not supported. */
4595 /* The parser only allows identifiers as designated
4597 if (ce->index == error_mark_node)
4598 error ("name used in a GNU-style designated "
4599 "initializer for an array");
4600 else if (TREE_CODE (ce->index) == INTEGER_CST)
4601 /* An index added by reshape_init. */
4605 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4606 error ("name %qD used in a GNU-style designated "
4607 "initializer for an array", ce->index);
4615 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4616 array until we finish parsing the initializer. If that's the
4617 situation we're in, update DECL accordingly. */
4620 maybe_deduce_size_from_array_init (tree decl, tree init)
4622 tree type = TREE_TYPE (decl);
4624 if (TREE_CODE (type) == ARRAY_TYPE
4625 && TYPE_DOMAIN (type) == NULL_TREE
4626 && TREE_CODE (decl) != TYPE_DECL)
4628 /* do_default is really a C-ism to deal with tentative definitions.
4629 But let's leave it here to ease the eventual merge. */
4630 int do_default = !DECL_EXTERNAL (decl);
4631 tree initializer = init ? init : DECL_INITIAL (decl);
4634 /* Check that there are no designated initializers in INIT, as
4635 those are not supported in GNU C++, and as the middle-end
4636 will crash if presented with a non-numeric designated
4638 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4640 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4641 constructor_elt *ce;
4643 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4644 if (!check_array_designated_initializer (ce))
4650 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4654 error ("initializer fails to determine size of %qD", decl);
4655 TREE_TYPE (decl) = error_mark_node;
4657 else if (failure == 2)
4661 error ("array size missing in %qD", decl);
4662 TREE_TYPE (decl) = error_mark_node;
4664 /* If a `static' var's size isn't known, make it extern as
4665 well as static, so it does not get allocated. If it's not
4666 `static', then don't mark it extern; finish_incomplete_decl
4667 will give it a default size and it will get allocated. */
4668 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4669 DECL_EXTERNAL (decl) = 1;
4671 else if (failure == 3)
4673 error ("zero-size array %qD", decl);
4674 TREE_TYPE (decl) = error_mark_node;
4678 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4680 relayout_decl (decl);
4684 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4685 any appropriate error messages regarding the layout. */
4688 layout_var_decl (tree decl)
4692 type = TREE_TYPE (decl);
4693 if (type == error_mark_node)
4696 /* If we haven't already layed out this declaration, do so now.
4697 Note that we must not call complete type for an external object
4698 because it's type might involve templates that we are not
4699 supposed to instantiate yet. (And it's perfectly valid to say
4700 `extern X x' for some incomplete type `X'.) */
4701 if (!DECL_EXTERNAL (decl))
4702 complete_type (type);
4703 if (!DECL_SIZE (decl)
4704 && TREE_TYPE (decl) != error_mark_node
4705 && (COMPLETE_TYPE_P (type)
4706 || (TREE_CODE (type) == ARRAY_TYPE
4707 && !TYPE_DOMAIN (type)
4708 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4709 layout_decl (decl, 0);
4711 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4713 /* An automatic variable with an incomplete type: that is an error.
4714 Don't talk about array types here, since we took care of that
4715 message in grokdeclarator. */
4716 error ("storage size of %qD isn%'t known", decl);
4717 TREE_TYPE (decl) = error_mark_node;
4720 /* Keep this code around in case we later want to control debug info
4721 based on whether a type is "used". (jason 1999-11-11) */
4723 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4724 /* Let debugger know it should output info for this type. */
4725 note_debug_info_needed (ttype);
4727 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4728 note_debug_info_needed (DECL_CONTEXT (decl));
4731 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4732 && DECL_SIZE (decl) != NULL_TREE
4733 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4735 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4736 constant_expression_warning (DECL_SIZE (decl));
4739 error ("storage size of %qD isn%'t constant", decl);
4740 TREE_TYPE (decl) = error_mark_node;
4745 /* If a local static variable is declared in an inline function, or if
4746 we have a weak definition, we must endeavor to create only one
4747 instance of the variable at link-time. */
4750 maybe_commonize_var (tree decl)
4752 /* Static data in a function with comdat linkage also has comdat
4754 if (TREE_STATIC (decl)
4755 /* Don't mess with __FUNCTION__. */
4756 && ! DECL_ARTIFICIAL (decl)
4757 && DECL_FUNCTION_SCOPE_P (decl)
4758 && vague_linkage_p (DECL_CONTEXT (decl)))
4762 /* With weak symbols, we simply make the variable COMDAT;
4763 that will cause copies in multiple translations units to
4765 comdat_linkage (decl);
4769 if (DECL_INITIAL (decl) == NULL_TREE
4770 || DECL_INITIAL (decl) == error_mark_node)
4772 /* Without weak symbols, we can use COMMON to merge
4773 uninitialized variables. */
4774 TREE_PUBLIC (decl) = 1;
4775 DECL_COMMON (decl) = 1;
4779 /* While for initialized variables, we must use internal
4780 linkage -- which means that multiple copies will not
4782 TREE_PUBLIC (decl) = 0;
4783 DECL_COMMON (decl) = 0;
4784 warning_at (input_location, 0,
4785 "sorry: semantics of inline function static "
4786 "data %q+#D are wrong (you%'ll wind up "
4787 "with multiple copies)", decl);
4788 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4789 " you can work around this by removing "
4794 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4795 /* Set it up again; we might have set DECL_INITIAL since the last
4797 comdat_linkage (decl);
4800 /* Issue an error message if DECL is an uninitialized const variable. */
4803 check_for_uninitialized_const_var (tree decl)
4805 tree type = strip_array_types (TREE_TYPE (decl));
4807 /* ``Unless explicitly declared extern, a const object does not have
4808 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4810 if (TREE_CODE (decl) == VAR_DECL
4811 && TREE_CODE (type) != REFERENCE_TYPE
4812 && CP_TYPE_CONST_P (type)
4813 && (!TYPE_NEEDS_CONSTRUCTING (type)
4814 || !type_has_user_provided_default_constructor (type))
4815 && !DECL_INITIAL (decl))
4817 permerror (DECL_SOURCE_LOCATION (decl),
4818 "uninitialized const %qD", decl);
4820 if (CLASS_TYPE_P (type)
4821 && !type_has_user_provided_default_constructor (type))
4823 tree defaulted_ctor;
4825 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4826 "%q#T has no user-provided default constructor", type);
4827 defaulted_ctor = in_class_defaulted_default_constructor (type);
4829 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4830 "constructor is not user-provided because it is "
4831 "explicitly defaulted in the class body");
4836 /* Structure holding the current initializer being processed by reshape_init.
4837 CUR is a pointer to the current element being processed, END is a pointer
4838 after the last element present in the initializer. */
4839 typedef struct reshape_iterator_t
4841 constructor_elt *cur;
4842 constructor_elt *end;
4845 static tree reshape_init_r (tree, reshape_iter *, bool);
4847 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4848 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4849 initialized. If there are no more such fields, the return value
4853 next_initializable_field (tree field)
4856 && (TREE_CODE (field) != FIELD_DECL
4857 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4858 || DECL_ARTIFICIAL (field)))
4859 field = DECL_CHAIN (field);
4864 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4865 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4866 INTEGER_CST representing the size of the array minus one (the maximum index),
4867 or NULL_TREE if the array was declared without specifying the size. D is
4868 the iterator within the constructor. */
4871 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4874 bool sized_array_p = (max_index != NULL_TREE);
4875 unsigned HOST_WIDE_INT max_index_cst = 0;
4876 unsigned HOST_WIDE_INT index;
4878 /* The initializer for an array is always a CONSTRUCTOR. */
4879 new_init = build_constructor (init_list_type_node, NULL);
4883 /* Minus 1 is used for zero sized arrays. */
4884 if (integer_all_onesp (max_index))
4887 if (host_integerp (max_index, 1))
4888 max_index_cst = tree_low_cst (max_index, 1);
4889 /* sizetype is sign extended, not zero extended. */
4891 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4895 /* Loop until there are no more initializers. */
4897 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4902 check_array_designated_initializer (d->cur);
4903 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4904 if (elt_init == error_mark_node)
4905 return error_mark_node;
4906 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4907 size_int (index), elt_init);
4913 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4914 Parameters are the same of reshape_init_r. */
4917 reshape_init_array (tree type, reshape_iter *d)
4919 tree max_index = NULL_TREE;
4921 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4923 if (TYPE_DOMAIN (type))
4924 max_index = array_type_nelts (type);
4926 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4929 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4930 Parameters are the same of reshape_init_r. */
4933 reshape_init_vector (tree type, reshape_iter *d)
4935 tree max_index = NULL_TREE;
4937 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4939 if (COMPOUND_LITERAL_P (d->cur->value))
4941 tree value = d->cur->value;
4942 if (!same_type_p (TREE_TYPE (value), type))
4944 error ("invalid type %qT as initializer for a vector of type %qT",
4945 TREE_TYPE (d->cur->value), type);
4946 value = error_mark_node;
4952 /* For a vector, we initialize it as an array of the appropriate size. */
4953 if (TREE_CODE (type) == VECTOR_TYPE)
4954 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
4956 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4959 /* Subroutine of reshape_init_r, processes the initializers for classes
4960 or union. Parameters are the same of reshape_init_r. */
4963 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4968 gcc_assert (CLASS_TYPE_P (type));
4970 /* The initializer for a class is always a CONSTRUCTOR. */
4971 new_init = build_constructor (init_list_type_node, NULL);
4972 field = next_initializable_field (TYPE_FIELDS (type));
4978 An initializer for an aggregate member that is an
4979 empty class shall have the form of an empty
4980 initializer-list {}. */
4981 if (!first_initializer_p)
4983 error ("initializer for %qT must be brace-enclosed", type);
4984 return error_mark_node;
4989 /* Loop through the initializable fields, gathering initializers. */
4990 while (d->cur != d->end)
4994 /* Handle designated initializers, as an extension. */
4997 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4999 if (!field || TREE_CODE (field) != FIELD_DECL)
5001 error ("%qT has no non-static data member named %qD", type,
5003 return error_mark_node;
5007 /* If we processed all the member of the class, we are done. */
5011 field_init = reshape_init_r (TREE_TYPE (field), d,
5012 /*first_initializer_p=*/false);
5013 if (field_init == error_mark_node)
5014 return error_mark_node;
5016 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5020 When a union is initialized with a brace-enclosed
5021 initializer, the braces shall only contain an
5022 initializer for the first member of the union. */
5023 if (TREE_CODE (type) == UNION_TYPE)
5026 field = next_initializable_field (DECL_CHAIN (field));
5032 /* Subroutine of reshape_init, which processes a single initializer (part of
5033 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5034 iterator within the CONSTRUCTOR which points to the initializer to process.
5035 FIRST_INITIALIZER_P is true if this is the first initializer of the
5036 outermost CONSTRUCTOR node. */
5039 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
5041 tree init = d->cur->value;
5043 if (error_operand_p (init))
5044 return error_mark_node;
5046 /* A non-aggregate type is always initialized with a single
5048 if (!CP_AGGREGATE_TYPE_P (type))
5050 /* It is invalid to initialize a non-aggregate type with a
5051 brace-enclosed initializer before C++0x.
5052 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5053 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5054 a CONSTRUCTOR (with a record type). */
5055 if (TREE_CODE (init) == CONSTRUCTOR
5056 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5058 if (SCALAR_TYPE_P (type))
5060 error ("braces around scalar initializer for type %qT", type);
5061 init = error_mark_node;
5064 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5073 All implicit type conversions (clause _conv_) are considered when
5074 initializing the aggregate member with an initializer from an
5075 initializer-list. If the initializer can initialize a member,
5076 the member is initialized. Otherwise, if the member is itself a
5077 non-empty subaggregate, brace elision is assumed and the
5078 initializer is considered for the initialization of the first
5079 member of the subaggregate. */
5080 if (TREE_CODE (init) != CONSTRUCTOR
5081 /* But don't try this for the first initializer, since that would be
5082 looking through the outermost braces; A a2 = { a1 }; is not a
5083 valid aggregate initialization. */
5084 && !first_initializer_p
5085 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5086 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5092 /* [dcl.init.string]
5094 A char array (whether plain char, signed char, or unsigned char)
5095 can be initialized by a string-literal (optionally enclosed in
5096 braces); a wchar_t array can be initialized by a wide
5097 string-literal (optionally enclosed in braces). */
5098 if (TREE_CODE (type) == ARRAY_TYPE
5099 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5101 tree str_init = init;
5103 /* Strip one level of braces if and only if they enclose a single
5104 element (as allowed by [dcl.init.string]). */
5105 if (!first_initializer_p
5106 && TREE_CODE (str_init) == CONSTRUCTOR
5107 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5109 str_init = VEC_index (constructor_elt,
5110 CONSTRUCTOR_ELTS (str_init), 0)->value;
5113 /* If it's a string literal, then it's the initializer for the array
5114 as a whole. Otherwise, continue with normal initialization for
5115 array types (one value per array element). */
5116 if (TREE_CODE (str_init) == STRING_CST)
5123 /* The following cases are about aggregates. If we are not within a full
5124 initializer already, and there is not a CONSTRUCTOR, it means that there
5125 is a missing set of braces (that is, we are processing the case for
5126 which reshape_init exists). */
5127 if (!first_initializer_p)
5129 if (TREE_CODE (init) == CONSTRUCTOR)
5131 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5132 /* There is no need to reshape pointer-to-member function
5133 initializers, as they are always constructed correctly
5134 by the front end. */
5136 else if (COMPOUND_LITERAL_P (init))
5137 /* For a nested compound literal, there is no need to reshape since
5138 brace elision is not allowed. Even if we decided to allow it,
5139 we should add a call to reshape_init in finish_compound_literal,
5140 before calling digest_init, so changing this code would still
5141 not be necessary. */
5142 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5146 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5147 return reshape_init (type, init);
5151 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5155 /* Dispatch to specialized routines. */
5156 if (CLASS_TYPE_P (type))
5157 return reshape_init_class (type, d, first_initializer_p);
5158 else if (TREE_CODE (type) == ARRAY_TYPE)
5159 return reshape_init_array (type, d);
5160 else if (TREE_CODE (type) == VECTOR_TYPE)
5161 return reshape_init_vector (type, d);
5166 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5167 brace-enclosed aggregate initializer.
5169 INIT is the CONSTRUCTOR containing the list of initializers describing
5170 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5171 It may not presently match the shape of the TYPE; for example:
5173 struct S { int a; int b; };
5174 struct S a[] = { 1, 2, 3, 4 };
5176 Here INIT will hold a VEC of four elements, rather than a
5177 VEC of two elements, each itself a VEC of two elements. This
5178 routine transforms INIT from the former form into the latter. The
5179 revised CONSTRUCTOR node is returned. */
5182 reshape_init (tree type, tree init)
5184 VEC(constructor_elt, gc) *v;
5188 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5190 v = CONSTRUCTOR_ELTS (init);
5192 /* An empty constructor does not need reshaping, and it is always a valid
5194 if (VEC_empty (constructor_elt, v))
5197 /* Recurse on this CONSTRUCTOR. */
5198 d.cur = VEC_index (constructor_elt, v, 0);
5199 d.end = d.cur + VEC_length (constructor_elt, v);
5201 new_init = reshape_init_r (type, &d, true);
5202 if (new_init == error_mark_node)
5203 return error_mark_node;
5205 /* Make sure all the element of the constructor were used. Otherwise,
5206 issue an error about exceeding initializers. */
5208 error ("too many initializers for %qT", type);
5213 /* Verify array initializer. Returns true if errors have been reported. */
5216 check_array_initializer (tree decl, tree type, tree init)
5218 tree element_type = TREE_TYPE (type);
5220 /* The array type itself need not be complete, because the
5221 initializer may tell us how many elements are in the array.
5222 But, the elements of the array must be complete. */
5223 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5226 error ("elements of array %q#D have incomplete type", decl);
5228 error ("elements of array %q#T have incomplete type", type);
5231 /* It is not valid to initialize a VLA. */
5233 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5234 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5237 error ("variable-sized object %qD may not be initialized", decl);
5239 error ("variable-sized compound literal");
5245 /* Subroutine of check_initializer; args are passed down from that function.
5246 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5249 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5252 int saved_stmts_are_full_exprs_p = 0;
5253 if (building_stmt_tree ())
5255 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5256 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5258 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5259 if (building_stmt_tree ())
5260 current_stmt_tree ()->stmts_are_full_exprs_p =
5261 saved_stmts_are_full_exprs_p;
5265 /* Verify INIT (the initializer for DECL), and record the
5266 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5267 grok_reference_init.
5269 If the return value is non-NULL, it is an expression that must be
5270 evaluated dynamically to initialize DECL. */
5273 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5275 tree type = TREE_TYPE (decl);
5276 tree init_code = NULL;
5277 tree extra_init = NULL_TREE;
5280 /* Things that are going to be initialized need to have complete
5282 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5284 if (type == error_mark_node)
5285 /* We will have already complained. */
5288 if (TREE_CODE (type) == ARRAY_TYPE)
5290 if (check_array_initializer (decl, type, init))
5293 else if (!COMPLETE_TYPE_P (type))
5295 error ("%qD has incomplete type", decl);
5296 TREE_TYPE (decl) = error_mark_node;
5300 /* There is no way to make a variable-sized class type in GNU C++. */
5301 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5303 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5305 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5306 if (SCALAR_TYPE_P (type))
5310 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5311 init = build_zero_init (type, NULL_TREE, false);
5313 else if (init_len != 1)
5315 error ("scalar object %qD requires one element in initializer",
5317 TREE_TYPE (decl) = error_mark_node;
5323 if (TREE_CODE (decl) == CONST_DECL)
5325 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5327 DECL_INITIAL (decl) = init;
5329 gcc_assert (init != NULL_TREE);
5332 else if (!init && DECL_REALLY_EXTERN (decl))
5334 else if (TREE_CODE (type) == REFERENCE_TYPE)
5335 init = grok_reference_init (decl, type, init, cleanup);
5336 else if (init || TYPE_NEEDS_CONSTRUCTING (type))
5339 check_for_uninitialized_const_var (decl);
5340 /* Do not reshape constructors of vectors (they don't need to be
5342 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5344 if (is_std_init_list (type))
5345 init = build_init_list_var_init (decl, type, init,
5346 &extra_init, cleanup);
5347 else if (TYPE_NON_AGGREGATE_CLASS (type))
5349 /* Don't reshape if the class has constructors. */
5350 if (cxx_dialect == cxx98)
5351 error ("in C++98 %qD must be initialized by constructor, "
5355 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5357 error ("opaque vector types cannot be initialized");
5358 init = error_mark_node;
5361 init = reshape_init (type, init);
5364 /* If DECL has an array type without a specific bound, deduce the
5365 array size from the initializer. */
5366 maybe_deduce_size_from_array_init (decl, init);
5367 type = TREE_TYPE (decl);
5368 if (type == error_mark_node)
5371 if (TYPE_NEEDS_CONSTRUCTING (type)
5372 || (CLASS_TYPE_P (type)
5373 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5375 init_code = build_aggr_init_full_exprs (decl, init, flags);
5377 /* If this is a constexpr initializer, expand_default_init will
5378 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5379 case, pull the initializer back out and pass it down into
5380 store_init_value. */
5381 while (TREE_CODE (init_code) == EXPR_STMT
5382 || TREE_CODE (init_code) == CONVERT_EXPR)
5383 init_code = TREE_OPERAND (init_code, 0);
5384 if (TREE_CODE (init_code) == INIT_EXPR)
5386 init = TREE_OPERAND (init_code, 1);
5387 init_code = NULL_TREE;
5388 /* Don't call digest_init; it's unnecessary and will complain
5389 about aggregate initialization of non-aggregate classes. */
5390 flags |= LOOKUP_ALREADY_DIGESTED;
5392 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5394 /* Declared constexpr, but no suitable initializer; massage
5395 init appropriately so we can pass it into store_init_value
5397 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5398 init = finish_compound_literal (type, init);
5399 else if (CLASS_TYPE_P (type)
5400 && (!init || TREE_CODE (init) == TREE_LIST))
5402 init = build_functional_cast (type, init, tf_none);
5403 if (init != error_mark_node)
5404 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5406 init_code = NULL_TREE;
5412 if (init && TREE_CODE (init) != TREE_VEC)
5414 init_code = store_init_value (decl, init, flags);
5415 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5416 && DECL_INITIAL (decl)
5417 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5418 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5419 warning (0, "array %qD initialized by parenthesized string literal %qE",
5420 decl, DECL_INITIAL (decl));
5426 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5427 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5428 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5429 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5432 check_for_uninitialized_const_var (decl);
5435 if (init && init != error_mark_node)
5436 init_code = build2 (INIT_EXPR, type, decl, init);
5439 init_code = add_stmt_to_compound (extra_init, init_code);
5441 if (init_code && DECL_IN_AGGR_P (decl))
5443 static int explained = 0;
5445 if (cxx_dialect < cxx0x)
5446 error ("initializer invalid for static member with constructor");
5448 error ("non-constant in-class initialization invalid for static "
5449 "member %qD", decl);
5452 error ("(an out of class initialization is required)");
5460 /* If DECL is not a local variable, give it RTL. */
5463 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5465 int toplev = toplevel_bindings_p ();
5467 const char *filename;
5469 /* Set the DECL_ASSEMBLER_NAME for the object. */
5472 /* The `register' keyword, when used together with an
5473 asm-specification, indicates that the variable should be
5474 placed in a particular register. */
5475 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5477 set_user_assembler_name (decl, asmspec);
5478 DECL_HARD_REGISTER (decl) = 1;
5482 if (TREE_CODE (decl) == FUNCTION_DECL
5483 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5484 set_builtin_user_assembler_name (decl, asmspec);
5485 set_user_assembler_name (decl, asmspec);
5489 /* Handle non-variables up front. */
5490 if (TREE_CODE (decl) != VAR_DECL)
5492 rest_of_decl_compilation (decl, toplev, at_eof);
5496 /* If we see a class member here, it should be a static data
5498 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5500 gcc_assert (TREE_STATIC (decl));
5501 /* An in-class declaration of a static data member should be
5502 external; it is only a declaration, and not a definition. */
5503 if (init == NULL_TREE)
5504 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5507 /* We don't create any RTL for local variables. */
5508 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5511 /* We defer emission of local statics until the corresponding
5512 DECL_EXPR is expanded. */
5513 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5515 /* We try to defer namespace-scope static constants so that they are
5516 not emitted into the object file unnecessarily. */
5517 filename = input_filename;
5518 if (!DECL_VIRTUAL_P (decl)
5519 && TREE_READONLY (decl)
5520 && DECL_INITIAL (decl) != NULL_TREE
5521 && DECL_INITIAL (decl) != error_mark_node
5523 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5525 && !TREE_PUBLIC (decl))
5527 /* Fool with the linkage of static consts according to #pragma
5529 struct c_fileinfo *finfo = get_fileinfo (filename);
5530 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5532 TREE_PUBLIC (decl) = 1;
5533 DECL_EXTERNAL (decl) = finfo->interface_only;
5538 /* Likewise for template instantiations. */
5539 else if (DECL_LANG_SPECIFIC (decl)
5540 && DECL_IMPLICIT_INSTANTIATION (decl))
5543 /* If we're not deferring, go ahead and assemble the variable. */
5545 rest_of_decl_compilation (decl, toplev, at_eof);
5548 /* walk_tree helper for wrap_temporary_cleanups, below. */
5551 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5553 if (TYPE_P (*stmt_p))
5559 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5561 tree guard = (tree)data;
5562 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5564 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5565 /* Tell honor_protect_cleanup_actions to handle this as a separate
5567 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5569 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5575 /* We're initializing a local variable which has a cleanup GUARD. If there
5576 are any temporaries used in the initializer INIT of this variable, we
5577 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5578 variable will be cleaned up properly if one of them throws.
5580 Unfortunately, there's no way to express this properly in terms of
5581 nesting, as the regions for the temporaries overlap the region for the
5582 variable itself; if there are two temporaries, the variable needs to be
5583 the first thing destroyed if either of them throws. However, we only
5584 want to run the variable's cleanup if it actually got constructed. So
5585 we need to guard the temporary cleanups with the variable's cleanup if
5586 they are run on the normal path, but not if they are run on the
5587 exceptional path. We implement this by telling
5588 honor_protect_cleanup_actions to strip the variable cleanup from the
5589 exceptional path. */
5592 wrap_temporary_cleanups (tree init, tree guard)
5594 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5597 /* Generate code to initialize DECL (a local variable). */
5600 initialize_local_var (tree decl, tree init)
5602 tree type = TREE_TYPE (decl);
5606 gcc_assert (TREE_CODE (decl) == VAR_DECL
5607 || TREE_CODE (decl) == RESULT_DECL);
5608 gcc_assert (!TREE_STATIC (decl));
5610 if (DECL_SIZE (decl) == NULL_TREE)
5612 /* If we used it already as memory, it must stay in memory. */
5613 DECL_INITIAL (decl) = NULL_TREE;
5614 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5618 if (type == error_mark_node)
5621 /* Compute and store the initial value. */
5622 already_used = TREE_USED (decl) || TREE_USED (type);
5623 if (TREE_USED (type))
5624 DECL_READ_P (decl) = 1;
5626 /* Generate a cleanup, if necessary. */
5627 cleanup = cxx_maybe_build_cleanup (decl);
5629 /* Perform the initialization. */
5632 int saved_stmts_are_full_exprs_p;
5634 /* If we're only initializing a single object, guard the destructors
5635 of any temporaries used in its initializer with its destructor.
5636 This isn't right for arrays because each element initialization is
5637 a full-expression. */
5638 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5639 wrap_temporary_cleanups (init, cleanup);
5641 gcc_assert (building_stmt_tree ());
5642 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5643 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5644 finish_expr_stmt (init);
5645 current_stmt_tree ()->stmts_are_full_exprs_p =
5646 saved_stmts_are_full_exprs_p;
5649 /* Set this to 0 so we can tell whether an aggregate which was
5650 initialized was ever used. Don't do this if it has a
5651 destructor, so we don't complain about the 'resource
5652 allocation is initialization' idiom. Now set
5653 attribute((unused)) on types so decls of that type will be
5654 marked used. (see TREE_USED, above.) */
5655 if (TYPE_NEEDS_CONSTRUCTING (type)
5657 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5658 && DECL_NAME (decl))
5659 TREE_USED (decl) = 0;
5660 else if (already_used)
5661 TREE_USED (decl) = 1;
5664 finish_decl_cleanup (decl, cleanup);
5667 /* DECL is a VAR_DECL for a compiler-generated variable with static
5668 storage duration (like a virtual table) whose initializer is a
5669 compile-time constant. Initialize the variable and provide it to the
5673 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5676 gcc_assert (DECL_ARTIFICIAL (decl));
5677 init = build_constructor (TREE_TYPE (decl), v);
5678 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5679 DECL_INITIAL (decl) = init;
5680 DECL_INITIALIZED_P (decl) = 1;
5681 determine_visibility (decl);
5682 layout_var_decl (decl);
5683 maybe_commonize_var (decl);
5684 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5687 /* INIT is the initializer for a variable, as represented by the
5688 parser. Returns true iff INIT is value-dependent. */
5691 value_dependent_init_p (tree init)
5693 if (TREE_CODE (init) == TREE_LIST)
5694 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5695 return any_value_dependent_elements_p (init);
5696 else if (TREE_CODE (init) == CONSTRUCTOR)
5697 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5699 VEC(constructor_elt, gc) *elts;
5703 elts = CONSTRUCTOR_ELTS (init);
5704 nelts = VEC_length (constructor_elt, elts);
5705 for (i = 0; i < nelts; ++i)
5706 if (value_dependent_init_p (VEC_index (constructor_elt,
5711 /* It must be a simple expression, e.g., int i = 3; */
5712 return value_dependent_expression_p (init);
5717 /* Finish processing of a declaration;
5718 install its line number and initial value.
5719 If the length of an array type is not known before,
5720 it must be determined now, from the initial value, or it is an error.
5722 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5723 true, then INIT is an integral constant expression.
5725 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5726 if the (init) syntax was used. */
5729 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5730 tree asmspec_tree, int flags)
5734 const char *asmspec = NULL;
5735 int was_readonly = 0;
5736 bool var_definition_p = false;
5737 int saved_processing_template_decl;
5740 if (decl == error_mark_node)
5745 error ("assignment (not initialization) in declaration");
5749 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5750 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5751 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5753 type = TREE_TYPE (decl);
5754 if (type == error_mark_node)
5757 /* Assume no cleanup is required. */
5758 cleanup = NULL_TREE;
5759 saved_processing_template_decl = processing_template_decl;
5761 /* If a name was specified, get the string. */
5762 if (global_scope_p (current_binding_level))
5763 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5764 if (asmspec_tree && asmspec_tree != error_mark_node)
5765 asmspec = TREE_STRING_POINTER (asmspec_tree);
5767 if (current_class_type
5768 && CP_DECL_CONTEXT (decl) == current_class_type
5769 && TYPE_BEING_DEFINED (current_class_type)
5770 && (DECL_INITIAL (decl) || init))
5771 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5773 auto_node = type_uses_auto (type);
5777 if (init == NULL_TREE)
5779 error ("declaration of %q#D has no initializer", decl);
5780 TREE_TYPE (decl) = error_mark_node;
5784 if (TREE_CODE (d_init) == TREE_LIST)
5785 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5786 tf_warning_or_error);
5787 d_init = resolve_nondeduced_context (d_init);
5788 if (describable_type (d_init))
5790 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5792 if (type == error_mark_node)
5797 if (TREE_CODE (decl) == FUNCTION_DECL)
5798 validate_constexpr_fundecl (decl);
5800 else if (!ensure_literal_type_for_constexpr_object (decl))
5801 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5803 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5806 if (init == ridpointers[(int)RID_DELETE])
5808 /* FIXME check this is 1st decl. */
5809 DECL_DELETED_FN (decl) = 1;
5810 DECL_DECLARED_INLINE_P (decl) = 1;
5811 DECL_INITIAL (decl) = error_mark_node;
5812 FOR_EACH_CLONE (clone, decl)
5814 DECL_DELETED_FN (clone) = 1;
5815 DECL_DECLARED_INLINE_P (clone) = 1;
5816 DECL_INITIAL (clone) = error_mark_node;
5820 else if (init == ridpointers[(int)RID_DEFAULT])
5822 if (defaultable_fn_check (decl))
5823 DECL_DEFAULTED_FN (decl) = 1;
5825 DECL_INITIAL (decl) = NULL_TREE;
5829 if (init && TREE_CODE (decl) == VAR_DECL)
5831 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5832 if (init_const_expr_p)
5834 /* Set these flags now for templates. We'll update the flags in
5835 store_init_value for instantiations. */
5836 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5837 if (decl_maybe_constant_var_p (decl))
5838 TREE_CONSTANT (decl) = 1;
5842 if (processing_template_decl)
5844 bool type_dependent_p;
5846 /* Add this declaration to the statement-tree. */
5847 if (at_function_scope_p ())
5848 add_decl_expr (decl);
5850 type_dependent_p = dependent_type_p (type);
5852 if (check_for_bare_parameter_packs (init))
5855 DECL_INITIAL (decl) = NULL_TREE;
5858 /* Generally, initializers in templates are expanded when the
5859 template is instantiated. But, if DECL is a variable constant
5860 then it can be used in future constant expressions, so its value
5861 must be available. */
5863 && DECL_CLASS_SCOPE_P (decl)
5864 /* We just set TREE_CONSTANT appropriately; see above. */
5865 && TREE_CONSTANT (decl)
5866 && !type_dependent_p
5867 /* FIXME non-value-dependent constant expression */
5868 && !value_dependent_init_p (init)))
5871 DECL_INITIAL (decl) = init;
5872 if (TREE_CODE (decl) == VAR_DECL
5873 && !DECL_PRETTY_FUNCTION_P (decl)
5874 && !type_dependent_p)
5875 maybe_deduce_size_from_array_init (decl, init);
5879 if (TREE_CODE (init) == TREE_LIST)
5881 /* If the parenthesized-initializer form was used (e.g.,
5882 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5883 arguments. (There is generally only one.) We convert them
5886 for (; list; list = TREE_CHAIN (list))
5888 tree elt = TREE_VALUE (list);
5889 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5893 init = fold_non_dependent_expr (init);
5894 processing_template_decl = 0;
5897 /* Take care of TYPE_DECLs up front. */
5898 if (TREE_CODE (decl) == TYPE_DECL)
5900 if (type != error_mark_node
5901 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5903 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5904 warning (0, "shadowing previous type declaration of %q#D", decl);
5905 set_identifier_type_value (DECL_NAME (decl), decl);
5908 /* If we have installed this as the canonical typedef for this
5909 type, and that type has not been defined yet, delay emitting
5910 the debug information for it, as we will emit it later. */
5911 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5912 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5913 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5915 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
5920 /* A reference will be modified here, as it is initialized. */
5921 if (! DECL_EXTERNAL (decl)
5922 && TREE_READONLY (decl)
5923 && TREE_CODE (type) == REFERENCE_TYPE)
5926 TREE_READONLY (decl) = 0;
5929 if (TREE_CODE (decl) == VAR_DECL)
5931 /* Only variables with trivial initialization and destruction can
5932 have thread-local storage. */
5933 if (DECL_THREAD_LOCAL_P (decl)
5934 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5935 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5936 error ("%qD cannot be thread-local because it has non-trivial "
5937 "type %qT", decl, TREE_TYPE (decl));
5938 /* If this is a local variable that will need a mangled name,
5939 register it now. We must do this before processing the
5940 initializer for the variable, since the initialization might
5941 require a guard variable, and since the mangled name of the
5942 guard variable will depend on the mangled name of this
5944 if (DECL_FUNCTION_SCOPE_P (decl)
5945 && TREE_STATIC (decl)
5946 && !DECL_ARTIFICIAL (decl))
5948 push_local_name (decl);
5949 if (DECL_CONSTRUCTOR_P (current_function_decl)
5950 || DECL_DESTRUCTOR_P (current_function_decl))
5951 /* Normally local_decls is populated during GIMPLE lowering,
5952 but [cd]tors are never actually compiled directly. We need
5953 to put statics on the list so we can deal with the label
5954 address extension. */
5955 add_local_decl (cfun, decl);
5958 /* Convert the initializer to the type of DECL, if we have not
5959 already initialized DECL. */
5960 if (!DECL_INITIALIZED_P (decl)
5961 /* If !DECL_EXTERNAL then DECL is being defined. In the
5962 case of a static data member initialized inside the
5963 class-specifier, there can be an initializer even if DECL
5964 is *not* defined. */
5965 && (!DECL_EXTERNAL (decl) || init))
5967 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5970 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5971 /* Allow libjava/prims.cc define primitive classes. */
5972 if (init != NULL_TREE
5973 || jclass == NULL_TREE
5974 || TREE_CODE (jclass) != TYPE_DECL
5975 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5976 || !same_type_ignoring_top_level_qualifiers_p
5977 (type, TREE_TYPE (TREE_TYPE (jclass))))
5978 error ("Java object %qD not allocated with %<new%>", decl);
5981 init = check_initializer (decl, init, flags, &cleanup);
5982 /* Thread-local storage cannot be dynamically initialized. */
5983 if (DECL_THREAD_LOCAL_P (decl) && init)
5985 error ("%qD is thread-local and so cannot be dynamically "
5986 "initialized", decl);
5990 /* Check that the initializer for a static data member was a
5991 constant. Although we check in the parser that the
5992 initializer is an integral constant expression, we do not
5993 simplify division-by-zero at the point at which it
5994 occurs. Therefore, in:
5996 struct S { static const int i = 7 / 0; };
5998 we issue an error at this point. It would
5999 probably be better to forbid division by zero in
6000 integral constant expressions. */
6001 if (DECL_EXTERNAL (decl) && init)
6003 error ("%qD cannot be initialized by a non-constant expression"
6004 " when being declared", decl);
6005 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6013 The memory occupied by any object of static storage
6014 duration is zero-initialized at program startup before
6015 any other initialization takes place.
6017 We cannot create an appropriate initializer until after
6018 the type of DECL is finalized. If DECL_INITIAL is set,
6019 then the DECL is statically initialized, and any
6020 necessary zero-initialization has already been performed. */
6021 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6022 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6023 /*nelts=*/NULL_TREE,
6024 /*static_storage_p=*/true);
6025 /* Remember that the initialization for this variable has
6027 DECL_INITIALIZED_P (decl) = 1;
6028 /* This declaration is the definition of this variable,
6029 unless we are initializing a static data member within
6030 the class specifier. */
6031 if (!DECL_EXTERNAL (decl))
6032 var_definition_p = true;
6034 /* If the variable has an array type, lay out the type, even if
6035 there is no initializer. It is valid to index through the
6036 array, and we must get TYPE_ALIGN set correctly on the array
6038 else if (TREE_CODE (type) == ARRAY_TYPE)
6041 if (!processing_template_decl
6042 && TREE_STATIC (decl)
6043 && !at_function_scope_p ()
6044 && current_function_decl == NULL)
6045 /* So decl is a global variable or a static member of a
6046 non local class. Record the types it uses
6047 so that we can decide later to emit debug info for them. */
6048 record_types_used_by_current_var_decl (decl);
6050 else if (TREE_CODE (decl) == FIELD_DECL
6051 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6052 error ("non-static data member %qD has Java class type", decl);
6054 /* Add this declaration to the statement-tree. This needs to happen
6055 after the call to check_initializer so that the DECL_EXPR for a
6056 reference temp is added before the DECL_EXPR for the reference itself. */
6057 if (at_function_scope_p ())
6058 add_decl_expr (decl);
6060 /* Let the middle end know about variables and functions -- but not
6061 static data members in uninstantiated class templates. */
6062 if (!saved_processing_template_decl
6063 && (TREE_CODE (decl) == VAR_DECL
6064 || TREE_CODE (decl) == FUNCTION_DECL))
6066 if (TREE_CODE (decl) == VAR_DECL)
6068 layout_var_decl (decl);
6069 maybe_commonize_var (decl);
6072 /* This needs to happen after the linkage is set. */
6073 determine_visibility (decl);
6075 if (var_definition_p && TREE_STATIC (decl))
6077 /* If a TREE_READONLY variable needs initialization
6078 at runtime, it is no longer readonly and we need to
6079 avoid MEM_READONLY_P being set on RTL created for it. */
6082 if (TREE_READONLY (decl))
6083 TREE_READONLY (decl) = 0;
6086 else if (was_readonly)
6087 TREE_READONLY (decl) = 1;
6090 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6092 /* Check for abstractness of the type. Notice that there is no
6093 need to strip array types here since the check for those types
6094 is already done within create_array_type_for_decl. */
6095 if (TREE_CODE (type) == FUNCTION_TYPE
6096 || TREE_CODE (type) == METHOD_TYPE)
6097 abstract_virtuals_error (decl, TREE_TYPE (type));
6099 abstract_virtuals_error (decl, type);
6101 if (TREE_TYPE (decl) == error_mark_node)
6102 /* No initialization required. */
6104 else if (TREE_CODE (decl) == FUNCTION_DECL)
6108 if (init == ridpointers[(int)RID_DEFAULT])
6110 /* An out-of-class default definition is defined at
6111 the point where it is explicitly defaulted. */
6112 if (DECL_DELETED_FN (decl))
6113 maybe_explain_implicit_delete (decl);
6114 else if (DECL_INITIAL (decl) == error_mark_node)
6115 synthesize_method (decl);
6118 error ("function %q#D is initialized like a variable", decl);
6120 /* else no initialization required. */
6122 else if (DECL_EXTERNAL (decl)
6123 && ! (DECL_LANG_SPECIFIC (decl)
6124 && DECL_NOT_REALLY_EXTERN (decl)))
6127 DECL_INITIAL (decl) = init;
6129 /* A variable definition. */
6130 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6131 /* Initialize the local variable. */
6132 initialize_local_var (decl, init);
6134 /* If a variable is defined, and then a subsequent
6135 definition with external linkage is encountered, we will
6136 get here twice for the same variable. We want to avoid
6137 calling expand_static_init more than once. For variables
6138 that are not static data members, we can call
6139 expand_static_init only when we actually process the
6140 initializer. It is not legal to redeclare a static data
6141 member, so this issue does not arise in that case. */
6142 else if (var_definition_p && TREE_STATIC (decl))
6143 expand_static_init (decl, init);
6146 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6147 reference, insert it in the statement-tree now. */
6149 push_cleanup (decl, cleanup, false);
6152 processing_template_decl = saved_processing_template_decl;
6155 TREE_READONLY (decl) = 1;
6158 /* Returns a declaration for a VAR_DECL as if:
6160 extern "C" TYPE NAME;
6162 had been seen. Used to create compiler-generated global
6166 declare_global_var (tree name, tree type)
6170 push_to_top_level ();
6171 decl = build_decl (input_location, VAR_DECL, name, type);
6172 TREE_PUBLIC (decl) = 1;
6173 DECL_EXTERNAL (decl) = 1;
6174 DECL_ARTIFICIAL (decl) = 1;
6175 /* If the user has explicitly declared this variable (perhaps
6176 because the code we are compiling is part of a low-level runtime
6177 library), then it is possible that our declaration will be merged
6178 with theirs by pushdecl. */
6179 decl = pushdecl (decl);
6180 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6181 pop_from_top_level ();
6186 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6187 if "__cxa_atexit" is not being used) corresponding to the function
6188 to be called when the program exits. */
6191 get_atexit_fn_ptr_type (void)
6195 if (!atexit_fn_ptr_type_node)
6198 if (flag_use_cxa_atexit
6199 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6200 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6201 arg_type = ptr_type_node;
6203 /* The parameter to "atexit" is "void (*)(void)". */
6204 arg_type = NULL_TREE;
6206 fn_type = build_function_type_list (void_type_node,
6207 arg_type, NULL_TREE);
6208 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6211 return atexit_fn_ptr_type_node;
6214 /* Returns a pointer to the `atexit' function. Note that if
6215 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6216 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6219 get_atexit_node (void)
6225 bool use_aeabi_atexit;
6230 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6232 /* The declaration for `__cxa_atexit' is:
6234 int __cxa_atexit (void (*)(void *), void *, void *)
6236 We build up the argument types and then the function type
6238 tree argtype0, argtype1, argtype2;
6240 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6241 /* First, build the pointer-to-function type for the first
6243 fn_ptr_type = get_atexit_fn_ptr_type ();
6244 /* Then, build the rest of the argument types. */
6245 argtype2 = ptr_type_node;
6246 if (use_aeabi_atexit)
6248 argtype1 = fn_ptr_type;
6249 argtype0 = ptr_type_node;
6253 argtype1 = ptr_type_node;
6254 argtype0 = fn_ptr_type;
6256 /* And the final __cxa_atexit type. */
6257 fn_type = build_function_type_list (integer_type_node,
6258 argtype0, argtype1, argtype2,
6260 fn_ptr_type = build_pointer_type (fn_type);
6261 if (use_aeabi_atexit)
6262 name = "__aeabi_atexit";
6264 name = "__cxa_atexit";
6268 /* The declaration for `atexit' is:
6270 int atexit (void (*)());
6272 We build up the argument types and then the function type
6274 fn_ptr_type = get_atexit_fn_ptr_type ();
6275 /* Build the final atexit type. */
6276 fn_type = build_function_type_list (integer_type_node,
6277 fn_ptr_type, NULL_TREE);
6281 /* Now, build the function declaration. */
6282 push_lang_context (lang_name_c);
6283 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6284 mark_used (atexit_fndecl);
6285 pop_lang_context ();
6286 atexit_node = decay_conversion (atexit_fndecl);
6291 /* Returns the __dso_handle VAR_DECL. */
6294 get_dso_handle_node (void)
6296 if (dso_handle_node)
6297 return dso_handle_node;
6299 /* Declare the variable. */
6300 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6303 return dso_handle_node;
6306 /* Begin a new function with internal linkage whose job will be simply
6307 to destroy some particular variable. */
6309 static GTY(()) int start_cleanup_cnt;
6312 start_cleanup_fn (void)
6317 bool use_cxa_atexit = flag_use_cxa_atexit
6318 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6320 push_to_top_level ();
6322 /* No need to mangle this. */
6323 push_lang_context (lang_name_c);
6325 /* Build the name of the function. */
6326 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6327 /* Build the function declaration. */
6328 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6329 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6330 /* It's a function with internal linkage, generated by the
6332 TREE_PUBLIC (fndecl) = 0;
6333 DECL_ARTIFICIAL (fndecl) = 1;
6334 /* Make the function `inline' so that it is only emitted if it is
6335 actually needed. It is unlikely that it will be inlined, since
6336 it is only called via a function pointer, but we avoid unnecessary
6337 emissions this way. */
6338 DECL_DECLARED_INLINE_P (fndecl) = 1;
6339 DECL_INTERFACE_KNOWN (fndecl) = 1;
6340 /* Build the parameter. */
6345 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6346 DECL_CONTEXT (parmdecl) = fndecl;
6347 TREE_USED (parmdecl) = 1;
6348 DECL_READ_P (parmdecl) = 1;
6349 DECL_ARGUMENTS (fndecl) = parmdecl;
6353 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6355 pop_lang_context ();
6357 return current_function_decl;
6360 /* Finish the cleanup function begun by start_cleanup_fn. */
6363 end_cleanup_fn (void)
6365 expand_or_defer_fn (finish_function (0));
6367 pop_from_top_level ();
6370 /* Generate code to handle the destruction of DECL, an object with
6371 static storage duration. */
6374 register_dtor_fn (tree decl)
6381 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6383 type = TREE_TYPE (decl);
6384 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6385 return void_zero_node;
6387 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6388 a class object, we can just pass the destructor to
6389 "__cxa_atexit"; we don't have to build a temporary function to do
6391 use_dtor = (flag_use_cxa_atexit
6392 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6393 && CLASS_TYPE_P (type));
6398 /* Find the destructor. */
6399 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6400 gcc_assert (idx >= 0);
6401 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6402 /* Make sure it is accessible. */
6403 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6407 /* Call build_cleanup before we enter the anonymous function so
6408 that any access checks will be done relative to the current
6409 scope, rather than the scope of the anonymous function. */
6410 build_cleanup (decl);
6412 /* Now start the function. */
6413 cleanup = start_cleanup_fn ();
6415 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6416 to the original function, rather than the anonymous one. That
6417 will make the back end think that nested functions are in use,
6418 which causes confusion. */
6419 push_deferring_access_checks (dk_no_check);
6420 fcall = build_cleanup (decl);
6421 pop_deferring_access_checks ();
6423 /* Create the body of the anonymous function. */
6424 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6425 finish_expr_stmt (fcall);
6426 finish_compound_stmt (compound_stmt);
6430 /* Call atexit with the cleanup function. */
6431 mark_used (cleanup);
6432 cleanup = build_address (cleanup);
6433 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6439 /* We must convert CLEANUP to the type that "__cxa_atexit"
6441 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6442 /* "__cxa_atexit" will pass the address of DECL to the
6443 cleanup function. */
6445 addr = build_address (decl);
6446 /* The declared type of the parameter to "__cxa_atexit" is
6447 "void *". For plain "T*", we could just let the
6448 machinery in cp_build_function_call convert it -- but if the
6449 type is "cv-qualified T *", then we need to convert it
6450 before passing it in, to avoid spurious errors. */
6451 addr = build_nop (ptr_type_node, addr);
6454 /* Since the cleanup functions we build ignore the address
6455 they're given, there's no reason to pass the actual address
6456 in, and, in general, it's cheaper to pass NULL than any
6458 addr = null_pointer_node;
6459 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6460 tf_warning_or_error);
6461 if (targetm.cxx.use_aeabi_atexit ())
6474 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6475 arg0, arg1, arg2, NULL_TREE);
6478 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6479 is its initializer. Generate code to handle the construction
6480 and destruction of DECL. */
6483 expand_static_init (tree decl, tree init)
6485 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6486 gcc_assert (TREE_STATIC (decl));
6488 /* Some variables require no dynamic initialization. */
6490 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6493 if (DECL_FUNCTION_SCOPE_P (decl))
6495 /* Emit code to perform this initialization but once. */
6496 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6497 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6498 tree guard, guard_addr;
6499 tree acquire_fn, release_fn, abort_fn;
6502 /* Emit code to perform this initialization but once. This code
6505 static <type> guard;
6506 if (!guard.first_byte) {
6507 if (__cxa_guard_acquire (&guard)) {
6510 // Do initialization.
6511 flag = true; __cxa_guard_release (&guard);
6512 // Register variable for destruction at end of program.
6514 if (!flag) __cxa_guard_abort (&guard);
6518 Note that the `flag' variable is only set to 1 *after* the
6519 initialization is complete. This ensures that an exception,
6520 thrown during the construction, will cause the variable to
6521 reinitialized when we pass through this code again, as per:
6525 If the initialization exits by throwing an exception, the
6526 initialization is not complete, so it will be tried again
6527 the next time control enters the declaration.
6529 This process should be thread-safe, too; multiple threads
6530 should not be able to initialize the variable more than
6533 /* Create the guard variable. */
6534 guard = get_guard (decl);
6536 /* This optimization isn't safe on targets with relaxed memory
6537 consistency. On such targets we force synchronization in
6538 __cxa_guard_acquire. */
6539 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6541 /* Begin the conditional initialization. */
6542 if_stmt = begin_if_stmt ();
6543 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6544 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6547 if (flag_threadsafe_statics)
6549 guard_addr = build_address (guard);
6551 acquire_fn = get_identifier ("__cxa_guard_acquire");
6552 release_fn = get_identifier ("__cxa_guard_release");
6553 abort_fn = get_identifier ("__cxa_guard_abort");
6554 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6556 tree vfntype = build_function_type_list (void_type_node,
6557 TREE_TYPE (guard_addr),
6559 acquire_fn = push_library_fn
6560 (acquire_fn, build_function_type_list (integer_type_node,
6561 TREE_TYPE (guard_addr),
6564 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6565 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6569 release_fn = identifier_global_value (release_fn);
6570 abort_fn = identifier_global_value (abort_fn);
6573 inner_if_stmt = begin_if_stmt ();
6574 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6577 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6578 begin = get_target_expr (boolean_false_node);
6579 flag = TARGET_EXPR_SLOT (begin);
6581 TARGET_EXPR_CLEANUP (begin)
6582 = build3 (COND_EXPR, void_type_node, flag,
6584 build_call_n (abort_fn, 1, guard_addr));
6585 CLEANUP_EH_ONLY (begin) = 1;
6587 /* Do the initialization itself. */
6588 init = add_stmt_to_compound (begin, init);
6589 init = add_stmt_to_compound
6590 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6591 init = add_stmt_to_compound
6592 (init, build_call_n (release_fn, 1, guard_addr));
6595 init = add_stmt_to_compound (init, set_guard (guard));
6597 /* Use atexit to register a function for destroying this static
6599 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6601 finish_expr_stmt (init);
6603 if (flag_threadsafe_statics)
6605 finish_compound_stmt (inner_then_clause);
6606 finish_then_clause (inner_if_stmt);
6607 finish_if_stmt (inner_if_stmt);
6610 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6612 finish_compound_stmt (then_clause);
6613 finish_then_clause (if_stmt);
6614 finish_if_stmt (if_stmt);
6618 static_aggregates = tree_cons (init, decl, static_aggregates);
6622 /* Make TYPE a complete type based on INITIAL_VALUE.
6623 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6624 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6625 3 if the initializer list is empty (in pedantic mode). */
6628 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6631 tree type, elt_type;
6635 unsigned HOST_WIDE_INT i;
6638 /* An array of character type can be initialized from a
6639 brace-enclosed string constant.
6641 FIXME: this code is duplicated from reshape_init. Probably
6642 we should just call reshape_init here? */
6643 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6644 && TREE_CODE (initial_value) == CONSTRUCTOR
6645 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6647 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6648 tree value = VEC_index (constructor_elt, v, 0)->value;
6650 if (TREE_CODE (value) == STRING_CST
6651 && VEC_length (constructor_elt, v) == 1)
6652 initial_value = value;
6655 /* If any of the elements are parameter packs, we can't actually
6656 complete this type now because the array size is dependent. */
6657 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6659 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6662 if (PACK_EXPANSION_P (value))
6668 failure = complete_array_type (ptype, initial_value, do_default);
6670 /* We can create the array before the element type is complete, which
6671 means that we didn't have these two bits set in the original type
6672 either. In completing the type, we are expected to propagate these
6673 bits. See also complete_type which does the same thing for arrays
6676 if (TYPE_DOMAIN (type))
6678 elt_type = TREE_TYPE (type);
6679 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6680 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6681 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6687 /* Return zero if something is declared to be a member of type
6688 CTYPE when in the context of CUR_TYPE. STRING is the error
6689 message to print in that case. Otherwise, quietly return 1. */
6692 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6694 if (ctype && ctype != cur_type)
6696 if (flags == DTOR_FLAG)
6697 error ("destructor for alien class %qT cannot be a member", ctype);
6699 error ("constructor for alien class %qT cannot be a member", ctype);
6705 /* Subroutine of `grokdeclarator'. */
6707 /* Generate errors possibly applicable for a given set of specifiers.
6708 This is for ARM $7.1.2. */
6711 bad_specifiers (tree object,
6712 enum bad_spec_place type,
6723 error ("%qD declared as a %<virtual%> variable", object);
6725 error ("%qD declared as an %<inline%> variable", object);
6727 error ("%<const%> and %<volatile%> function specifiers on "
6728 "%qD invalid in variable declaration", object);
6732 error ("%qD declared as a %<virtual%> parameter", object);
6734 error ("%qD declared as an %<inline%> parameter", object);
6736 error ("%<const%> and %<volatile%> function specifiers on "
6737 "%qD invalid in parameter declaration", object);
6741 error ("%qD declared as a %<virtual%> type", object);
6743 error ("%qD declared as an %<inline%> type", object);
6745 error ("%<const%> and %<volatile%> function specifiers on "
6746 "%qD invalid in type declaration", object);
6750 error ("%qD declared as a %<virtual%> field", object);
6752 error ("%qD declared as an %<inline%> field", object);
6754 error ("%<const%> and %<volatile%> function specifiers on "
6755 "%qD invalid in field declaration", object);
6761 error ("%q+D declared as a friend", object);
6763 && (TREE_CODE (object) == TYPE_DECL
6764 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6765 && !TYPE_REFFN_P (TREE_TYPE (object))
6766 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6767 error ("%q+D declared with an exception specification", object);
6770 /* DECL is a member function or static data member and is presently
6771 being defined. Check that the definition is taking place in a
6775 check_class_member_definition_namespace (tree decl)
6777 /* These checks only apply to member functions and static data
6779 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6780 || TREE_CODE (decl) == VAR_DECL);
6781 /* We check for problems with specializations in pt.c in
6782 check_specialization_namespace, where we can issue better
6784 if (processing_specialization)
6786 /* There are no restrictions on the placement of
6787 explicit instantiations. */
6788 if (processing_explicit_instantiation)
6792 A member function definition that appears outside of the
6793 class definition shall appear in a namespace scope enclosing
6794 the class definition.
6798 The definition for a static data member shall appear in a
6799 namespace scope enclosing the member's class definition. */
6800 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6801 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6802 decl, DECL_CONTEXT (decl));
6805 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6806 METHOD_TYPE for a non-static member function; QUALS are the
6807 cv-qualifiers that apply to the function. */
6810 build_this_parm (tree type, cp_cv_quals quals)
6815 cp_cv_quals this_quals;
6817 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6818 /* The `this' parameter is implicitly `const'; it cannot be
6820 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6821 qual_type = cp_build_qualified_type (this_type, this_quals);
6822 parm = build_artificial_parm (this_identifier, qual_type);
6823 cp_apply_type_quals_to_decl (this_quals, parm);
6827 /* CTYPE is class type, or null if non-class.
6828 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6830 DECLARATOR is the function's name.
6831 PARMS is a chain of PARM_DECLs for the function.
6832 VIRTUALP is truthvalue of whether the function is virtual or not.
6833 FLAGS are to be passed through to `grokclassfn'.
6834 QUALS are qualifiers indicating whether the function is `const'
6836 RAISES is a list of exceptions that this function can raise.
6837 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6838 not look, and -1 if we should not call `grokclassfn' at all.
6840 SFK is the kind of special function (if any) for the new function.
6842 Returns `NULL_TREE' if something goes wrong, after issuing
6843 applicable error messages. */
6846 grokfndecl (tree ctype,
6850 tree orig_declarator,
6852 enum overload_flags flags,
6859 special_function_kind sfk,
6864 location_t location)
6867 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6871 type = build_exception_variant (type, raises);
6873 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6875 /* If we have an explicit location, use it, otherwise use whatever
6876 build_lang_decl used (probably input_location). */
6877 if (location != UNKNOWN_LOCATION)
6878 DECL_SOURCE_LOCATION (decl) = location;
6880 if (TREE_CODE (type) == METHOD_TYPE)
6883 parm = build_this_parm (type, quals);
6884 DECL_CHAIN (parm) = parms;
6887 DECL_ARGUMENTS (decl) = parms;
6888 for (t = parms; t; t = DECL_CHAIN (t))
6889 DECL_CONTEXT (t) = decl;
6890 /* Propagate volatile out from type to decl. */
6891 if (TYPE_VOLATILE (type))
6892 TREE_THIS_VOLATILE (decl) = 1;
6894 /* Setup decl according to sfk. */
6897 case sfk_constructor:
6898 case sfk_copy_constructor:
6899 case sfk_move_constructor:
6900 DECL_CONSTRUCTOR_P (decl) = 1;
6902 case sfk_destructor:
6903 DECL_DESTRUCTOR_P (decl) = 1;
6909 /* If pointers to member functions use the least significant bit to
6910 indicate whether a function is virtual, ensure a pointer
6911 to this function will have that bit clear. */
6912 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6913 && TREE_CODE (type) == METHOD_TYPE
6914 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6915 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6918 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6922 ("defining explicit specialization %qD in friend declaration",
6926 tree fns = TREE_OPERAND (orig_declarator, 0);
6927 tree args = TREE_OPERAND (orig_declarator, 1);
6929 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6931 /* Something like `template <class T> friend void f<T>()'. */
6932 error ("invalid use of template-id %qD in declaration "
6933 "of primary template",
6939 /* A friend declaration of the form friend void f<>(). Record
6940 the information in the TEMPLATE_ID_EXPR. */
6941 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6943 if (TREE_CODE (fns) == COMPONENT_REF)
6945 /* Due to bison parser ickiness, we will have already looked
6946 up an operator_name or PFUNCNAME within the current class
6947 (see template_id in parse.y). If the current class contains
6948 such a name, we'll get a COMPONENT_REF here. Undo that. */
6950 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6951 == current_class_type);
6952 fns = TREE_OPERAND (fns, 1);
6954 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6955 || TREE_CODE (fns) == OVERLOAD);
6956 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
6958 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6959 if (TREE_PURPOSE (t)
6960 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6962 error ("default arguments are not allowed in declaration "
6963 "of friend template specialization %qD",
6970 error ("%<inline%> is not allowed in declaration of friend "
6971 "template specialization %qD",
6978 /* If this decl has namespace scope, set that up. */
6980 set_decl_namespace (decl, in_namespace, friendp);
6982 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
6984 /* `main' and builtins have implicit 'C' linkage. */
6985 if ((MAIN_NAME_P (declarator)
6986 || (IDENTIFIER_LENGTH (declarator) > 10
6987 && IDENTIFIER_POINTER (declarator)[0] == '_'
6988 && IDENTIFIER_POINTER (declarator)[1] == '_'
6989 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6990 && current_lang_name == lang_name_cplusplus
6991 && ctype == NULL_TREE
6992 && DECL_FILE_SCOPE_P (decl))
6993 SET_DECL_LANGUAGE (decl, lang_c);
6995 /* Should probably propagate const out from type to decl I bet (mrs). */
6998 DECL_STATIC_FUNCTION_P (decl) = 1;
6999 DECL_CONTEXT (decl) = ctype;
7004 DECL_CONTEXT (decl) = ctype;
7006 check_class_member_definition_namespace (decl);
7009 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7011 if (processing_template_decl)
7012 error ("cannot declare %<::main%> to be a template");
7014 error ("cannot declare %<::main%> to be inline");
7016 error ("cannot declare %<::main%> to be static");
7021 /* Members of anonymous types and local classes have no linkage; make
7022 them internal. If a typedef is made later, this will be changed. */
7023 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7024 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7027 if (publicp && cxx_dialect == cxx98)
7029 /* [basic.link]: A name with no linkage (notably, the name of a class
7030 or enumeration declared in a local scope) shall not be used to
7031 declare an entity with linkage.
7033 DR 757 relaxes this restriction for C++0x. */
7034 t = no_linkage_check (TREE_TYPE (decl),
7035 /*relaxed_p=*/false);
7038 if (TYPE_ANONYMOUS_P (t))
7040 if (DECL_EXTERN_C_P (decl))
7041 /* Allow this; it's pretty common in C. */;
7044 permerror (input_location, "anonymous type with no linkage "
7045 "used to declare function %q#D with linkage",
7047 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7048 permerror (input_location, "%q+#D does not refer to the unqualified "
7049 "type, so it is not used for linkage",
7054 permerror (input_location, "type %qT with no linkage used to "
7055 "declare function %q#D with linkage", t, decl);
7059 TREE_PUBLIC (decl) = publicp;
7062 DECL_INTERFACE_KNOWN (decl) = 1;
7063 DECL_NOT_REALLY_EXTERN (decl) = 1;
7066 /* If the declaration was declared inline, mark it as such. */
7068 DECL_DECLARED_INLINE_P (decl) = 1;
7070 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7072 DECL_EXTERNAL (decl) = 1;
7073 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7076 ? G_("static member function %qD cannot have cv-qualifier")
7077 : G_("non-member function %qD cannot have cv-qualifier"),
7079 quals = TYPE_UNQUALIFIED;
7082 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7083 && !grok_op_properties (decl, /*complain=*/true))
7087 /* Make the init_value nonzero so pushdecl knows this is not
7088 tentative. error_mark_node is replaced later with the BLOCK. */
7089 DECL_INITIAL (decl) = error_mark_node;
7091 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7092 TREE_NOTHROW (decl) = 1;
7094 /* Caller will do the rest of this. */
7098 if (ctype != NULL_TREE)
7099 grokclassfn (ctype, decl, flags);
7101 decl = check_explicit_specialization (orig_declarator, decl,
7104 4 * (friendp != 0));
7105 if (decl == error_mark_node)
7110 cplus_decl_attributes (&decl, *attrlist, 0);
7111 *attrlist = NULL_TREE;
7114 /* Check main's type after attributes have been applied. */
7115 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7117 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7120 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7122 error ("%<::main%> must return %<int%>");
7123 newtype = build_function_type (integer_type_node, oldtypeargs);
7124 TREE_TYPE (decl) = newtype;
7127 check_main_parameter_types (decl);
7130 if (ctype != NULL_TREE
7131 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7134 tree old_decl = check_classfn (ctype, decl,
7135 (processing_template_decl
7136 > template_class_depth (ctype))
7137 ? current_template_parms
7140 if (old_decl == error_mark_node)
7148 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7149 /* Because grokfndecl is always supposed to return a
7150 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7151 here. We depend on our callers to figure out that its
7152 really a template that's being returned. */
7153 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7155 if (DECL_STATIC_FUNCTION_P (old_decl)
7156 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7157 /* Remove the `this' parm added by grokclassfn.
7158 XXX Isn't this done in start_function, too? */
7159 revert_static_member_fn (decl);
7160 if (DECL_ARTIFICIAL (old_decl))
7162 error ("definition of implicitly-declared %qD", old_decl);
7166 /* Since we've smashed OLD_DECL to its
7167 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7168 if (TREE_CODE (decl) == TEMPLATE_DECL)
7169 decl = DECL_TEMPLATE_RESULT (decl);
7171 /* Attempt to merge the declarations. This can fail, in
7172 the case of some invalid specialization declarations. */
7173 pushed_scope = push_scope (ctype);
7174 ok = duplicate_decls (decl, old_decl, friendp);
7176 pop_scope (pushed_scope);
7179 error ("no %q#D member function declared in class %qT",
7187 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7190 if (ctype == NULL_TREE || check)
7194 DECL_VIRTUAL_P (decl) = 1;
7199 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7200 the linkage that DECL will receive in the object file. */
7203 set_linkage_for_static_data_member (tree decl)
7205 /* A static data member always has static storage duration and
7206 external linkage. Note that static data members are forbidden in
7207 local classes -- the only situation in which a class has
7208 non-external linkage. */
7209 TREE_PUBLIC (decl) = 1;
7210 TREE_STATIC (decl) = 1;
7211 /* For non-template classes, static data members are always put
7212 out in exactly those files where they are defined, just as
7213 with ordinary namespace-scope variables. */
7214 if (!processing_template_decl)
7215 DECL_INTERFACE_KNOWN (decl) = 1;
7218 /* Create a VAR_DECL named NAME with the indicated TYPE.
7220 If SCOPE is non-NULL, it is the class type or namespace containing
7221 the variable. If SCOPE is NULL, the variable should is created in
7222 the innermost enclosings scope. */
7225 grokvardecl (tree type,
7227 const cp_decl_specifier_seq *declspecs,
7233 tree explicit_scope;
7235 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7237 /* Compute the scope in which to place the variable, but remember
7238 whether or not that scope was explicitly specified by the user. */
7239 explicit_scope = scope;
7242 /* An explicit "extern" specifier indicates a namespace-scope
7244 if (declspecs->storage_class == sc_extern)
7245 scope = current_decl_namespace ();
7246 else if (!at_function_scope_p ())
7247 scope = current_scope ();
7251 && (/* If the variable is a namespace-scope variable declared in a
7252 template, we need DECL_LANG_SPECIFIC. */
7253 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7254 /* Similarly for namespace-scope variables with language linkage
7256 || (TREE_CODE (scope) == NAMESPACE_DECL
7257 && current_lang_name != lang_name_cplusplus)
7258 /* Similarly for static data members. */
7260 decl = build_lang_decl (VAR_DECL, name, type);
7262 decl = build_decl (input_location, VAR_DECL, name, type);
7264 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7265 set_decl_namespace (decl, explicit_scope, 0);
7267 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7269 if (declspecs->storage_class == sc_extern)
7271 DECL_THIS_EXTERN (decl) = 1;
7272 DECL_EXTERNAL (decl) = !initialized;
7275 if (DECL_CLASS_SCOPE_P (decl))
7277 set_linkage_for_static_data_member (decl);
7278 /* This function is only called with out-of-class definitions. */
7279 DECL_EXTERNAL (decl) = 0;
7280 check_class_member_definition_namespace (decl);
7282 /* At top level, either `static' or no s.c. makes a definition
7283 (perhaps tentative), and absence of `static' makes it public. */
7284 else if (toplevel_bindings_p ())
7286 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7287 && (DECL_THIS_EXTERN (decl) || ! constp));
7288 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7290 /* Not at top level, only `static' makes a static definition. */
7293 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7294 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7297 if (declspecs->specs[(int)ds_thread])
7298 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7300 /* If the type of the decl has no linkage, make sure that we'll
7301 notice that in mark_used. */
7302 if (cxx_dialect > cxx98
7303 && decl_linkage (decl) != lk_none
7304 && DECL_LANG_SPECIFIC (decl) == NULL
7305 && !DECL_EXTERN_C_P (decl)
7306 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7307 retrofit_lang_decl (decl);
7309 if (TREE_PUBLIC (decl))
7311 /* [basic.link]: A name with no linkage (notably, the name of a class
7312 or enumeration declared in a local scope) shall not be used to
7313 declare an entity with linkage.
7315 DR 757 relaxes this restriction for C++0x. */
7316 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7317 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7320 if (TYPE_ANONYMOUS_P (t))
7322 if (DECL_EXTERN_C_P (decl))
7323 /* Allow this; it's pretty common in C. */
7327 /* DRs 132, 319 and 389 seem to indicate types with
7328 no linkage can only be used to declare extern "C"
7329 entities. Since it's not always an error in the
7330 ISO C++ 90 Standard, we only issue a warning. */
7331 warning (0, "anonymous type with no linkage used to declare "
7332 "variable %q#D with linkage", decl);
7333 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7334 warning (0, "%q+#D does not refer to the unqualified "
7335 "type, so it is not used for linkage",
7340 warning (0, "type %qT with no linkage used to declare variable "
7341 "%q#D with linkage", t, decl);
7345 DECL_INTERFACE_KNOWN (decl) = 1;
7350 /* Create and return a canonical pointer to member function type, for
7351 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7354 build_ptrmemfunc_type (tree type)
7358 tree unqualified_variant = NULL_TREE;
7360 if (type == error_mark_node)
7363 /* If a canonical type already exists for this type, use it. We use
7364 this method instead of type_hash_canon, because it only does a
7365 simple equality check on the list of field members. */
7367 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7370 /* Make sure that we always have the unqualified pointer-to-member
7372 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7374 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7376 t = make_class_type (RECORD_TYPE);
7377 xref_basetypes (t, NULL_TREE);
7379 /* Let the front end know this is a pointer to member function... */
7380 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7381 /* ... and not really a class type. */
7382 SET_CLASS_TYPE_P (t, 0);
7384 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7387 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7389 DECL_CHAIN (field) = fields;
7392 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7394 /* Zap out the name so that the back end will give us the debugging
7395 information for this anonymous RECORD_TYPE. */
7396 TYPE_NAME (t) = NULL_TREE;
7398 /* If this is not the unqualified form of this pointer-to-member
7399 type, set the TYPE_MAIN_VARIANT for this type to be the
7400 unqualified type. Since they are actually RECORD_TYPEs that are
7401 not variants of each other, we must do this manually.
7402 As we just built a new type there is no need to do yet another copy. */
7403 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7405 int type_quals = cp_type_quals (type);
7406 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7407 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7408 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7409 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7410 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7411 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7412 TREE_TYPE (TYPE_BINFO (t)) = t;
7415 /* Cache this pointer-to-member type so that we can find it again
7417 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7419 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7420 SET_TYPE_STRUCTURAL_EQUALITY (t);
7421 else if (TYPE_CANONICAL (type) != type)
7422 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7427 /* Create and return a pointer to data member type. */
7430 build_ptrmem_type (tree class_type, tree member_type)
7432 if (TREE_CODE (member_type) == METHOD_TYPE)
7434 cp_cv_quals quals = type_memfn_quals (member_type);
7435 member_type = build_memfn_type (member_type, class_type, quals);
7436 return build_ptrmemfunc_type (build_pointer_type (member_type));
7440 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7441 return build_offset_type (class_type, member_type);
7445 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7446 Check to see that the definition is valid. Issue appropriate error
7447 messages. Return 1 if the definition is particularly bad, or 0
7451 check_static_variable_definition (tree decl, tree type)
7453 /* If DECL is declared constexpr, we'll do the appropriate checks
7454 in check_initializer. */
7455 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7457 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7459 if (literal_type_p (type))
7460 error ("%<constexpr%> needed for in-class initialization of static "
7461 "data member %q#D of non-integral type", decl);
7463 error ("in-class initialization of static data member %q#D of "
7464 "non-literal type", decl);
7468 /* Motion 10 at San Diego: If a static const integral data member is
7469 initialized with an integral constant expression, the initializer
7470 may appear either in the declaration (within the class), or in
7471 the definition, but not both. If it appears in the class, the
7472 member is a member constant. The file-scope definition is always
7474 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7476 error ("invalid in-class initialization of static data member "
7477 "of non-integral type %qT",
7481 else if (!CP_TYPE_CONST_P (type))
7482 error ("ISO C++ forbids in-class initialization of non-const "
7483 "static member %qD",
7485 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7486 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7487 "%qD of non-integral type %qT", decl, type);
7492 /* Given the SIZE (i.e., number of elements) in an array, compute an
7493 appropriate index type for the array. If non-NULL, NAME is the
7494 name of the thing being declared. */
7497 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7502 tree abi_1_itype = NULL_TREE;
7504 if (error_operand_p (size))
7505 return error_mark_node;
7507 type = TREE_TYPE (size);
7508 /* type_dependent_expression_p? */
7509 if (!dependent_type_p (type))
7511 mark_rvalue_use (size);
7513 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7514 && TREE_SIDE_EFFECTS (size))
7515 /* In C++98, we mark a non-constant array bound with a magic
7516 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7519 size = fold_non_dependent_expr (size);
7521 if (CLASS_TYPE_P (type)
7522 && CLASSTYPE_LITERAL_P (type))
7524 size = build_expr_type_conversion (WANT_INT, size, true);
7525 if (size == error_mark_node)
7526 return error_mark_node;
7527 type = TREE_TYPE (size);
7528 /* We didn't support this case in GCC 3.2, so don't bother
7529 trying to model it now in ABI v1. */
7530 abi_1_itype = error_mark_node;
7533 size = maybe_constant_value (size);
7534 if (!TREE_CONSTANT (size))
7538 if (error_operand_p (size))
7539 return error_mark_node;
7541 /* The array bound must be an integer type. */
7542 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7544 if (!(complain & tf_error))
7545 return error_mark_node;
7547 error ("size of array %qD has non-integral type %qT", name, type);
7549 error ("size of array has non-integral type %qT", type);
7550 size = integer_one_node;
7551 type = TREE_TYPE (size);
7555 /* A type is dependent if it is...an array type constructed from any
7556 dependent type or whose size is specified by a constant expression
7557 that is value-dependent. */
7558 /* We can only call value_dependent_expression_p on integral constant
7559 expressions; treat non-constant expressions as dependent, too. */
7560 if (processing_template_decl
7561 && (dependent_type_p (type)
7562 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7564 /* We cannot do any checking for a SIZE that isn't known to be
7565 constant. Just build the index type and mark that it requires
7566 structural equality checks. */
7567 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7568 size, integer_one_node));
7569 TYPE_DEPENDENT_P (itype) = 1;
7570 TYPE_DEPENDENT_P_VALID (itype) = 1;
7571 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7575 if (!abi_version_at_least (2) && processing_template_decl
7576 && abi_1_itype == NULL_TREE)
7577 /* For abi-1, we handled all instances in templates the same way,
7578 even when they were non-dependent. This affects the manglings
7579 produced. So, we do the normal checking for non-dependent
7580 sizes, but at the end we'll return the same type that abi-1
7581 would have, but with TYPE_CANONICAL set to the "right"
7582 value that the current ABI would provide. */
7583 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7584 osize, integer_one_node));
7586 /* Normally, the array-bound will be a constant. */
7587 if (TREE_CODE (size) == INTEGER_CST)
7589 /* Check to see if the array bound overflowed. Make that an
7590 error, no matter how generous we're being. */
7591 constant_expression_error (size);
7593 /* An array must have a positive number of elements. */
7594 if (INT_CST_LT (size, integer_zero_node))
7596 if (!(complain & tf_error))
7597 return error_mark_node;
7599 error ("size of array %qD is negative", name);
7601 error ("size of array is negative");
7602 size = integer_one_node;
7604 /* As an extension we allow zero-sized arrays. */
7605 else if (integer_zerop (size))
7607 if (!(complain & tf_error))
7608 /* We must fail if performing argument deduction (as
7609 indicated by the state of complain), so that
7610 another substitution can be found. */
7611 return error_mark_node;
7612 else if (in_system_header)
7613 /* Allow them in system headers because glibc uses them. */;
7615 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7617 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7620 else if (TREE_CONSTANT (size)
7621 /* We don't allow VLAs at non-function scopes, or during
7622 tentative template substitution. */
7623 || !at_function_scope_p () || !(complain & tf_error))
7625 if (!(complain & tf_error))
7626 return error_mark_node;
7627 /* `(int) &fn' is not a valid array bound. */
7629 error ("size of array %qD is not an integral constant-expression",
7632 error ("size of array is not an integral constant-expression");
7633 size = integer_one_node;
7635 else if (pedantic && warn_vla != 0)
7638 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7640 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7642 else if (warn_vla > 0)
7646 "variable length array %qD is used", name);
7649 "variable length array is used");
7652 if (processing_template_decl && !TREE_CONSTANT (size))
7653 /* A variable sized array. */
7654 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7657 HOST_WIDE_INT saved_processing_template_decl;
7659 /* Compute the index of the largest element in the array. It is
7660 one less than the number of elements in the array. We save
7661 and restore PROCESSING_TEMPLATE_DECL so that computations in
7662 cp_build_binary_op will be appropriately folded. */
7663 saved_processing_template_decl = processing_template_decl;
7664 processing_template_decl = 0;
7665 itype = cp_build_binary_op (input_location,
7667 cp_convert (ssizetype, size),
7668 cp_convert (ssizetype, integer_one_node),
7669 tf_warning_or_error);
7670 itype = fold (itype);
7671 processing_template_decl = saved_processing_template_decl;
7673 if (!TREE_CONSTANT (itype))
7674 /* A variable sized array. */
7675 itype = variable_size (itype);
7676 /* Make sure that there was no overflow when creating to a signed
7677 index type. (For example, on a 32-bit machine, an array with
7678 size 2^32 - 1 is too big.) */
7679 else if (TREE_CODE (itype) == INTEGER_CST
7680 && TREE_OVERFLOW (itype))
7682 if (!(complain & tf_error))
7683 return error_mark_node;
7684 error ("overflow in array dimension");
7685 TREE_OVERFLOW (itype) = 0;
7689 /* Create and return the appropriate index type. */
7690 if (abi_1_itype && abi_1_itype != error_mark_node)
7692 tree t = build_index_type (itype);
7693 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7694 itype = abi_1_itype;
7697 itype = build_index_type (itype);
7699 /* If the index type were dependent, we would have returned early, so
7700 remember that it isn't. */
7701 TYPE_DEPENDENT_P (itype) = 0;
7702 TYPE_DEPENDENT_P_VALID (itype) = 1;
7706 /* Returns the scope (if any) in which the entity declared by
7707 DECLARATOR will be located. If the entity was declared with an
7708 unqualified name, NULL_TREE is returned. */
7711 get_scope_of_declarator (const cp_declarator *declarator)
7713 while (declarator && declarator->kind != cdk_id)
7714 declarator = declarator->declarator;
7716 /* If the declarator-id is a SCOPE_REF, the scope in which the
7717 declaration occurs is the first operand. */
7719 && declarator->u.id.qualifying_scope)
7720 return declarator->u.id.qualifying_scope;
7722 /* Otherwise, the declarator is not a qualified name; the entity will
7723 be declared in the current scope. */
7727 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7728 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7732 create_array_type_for_decl (tree name, tree type, tree size)
7734 tree itype = NULL_TREE;
7736 /* If things have already gone awry, bail now. */
7737 if (type == error_mark_node || size == error_mark_node)
7738 return error_mark_node;
7740 /* If there are some types which cannot be array elements,
7741 issue an error-message and return. */
7742 switch (TREE_CODE (type))
7746 error ("declaration of %qD as array of void", name);
7748 error ("creating array of void");
7749 return error_mark_node;
7753 error ("declaration of %qD as array of functions", name);
7755 error ("creating array of functions");
7756 return error_mark_node;
7758 case REFERENCE_TYPE:
7760 error ("declaration of %qD as array of references", name);
7762 error ("creating array of references");
7763 return error_mark_node;
7767 error ("declaration of %qD as array of function members", name);
7769 error ("creating array of function members");
7770 return error_mark_node;
7778 The constant expressions that specify the bounds of the arrays
7779 can be omitted only for the first member of the sequence. */
7780 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7783 error ("declaration of %qD as multidimensional array must "
7784 "have bounds for all dimensions except the first",
7787 error ("multidimensional array must have bounds for all "
7788 "dimensions except the first");
7790 return error_mark_node;
7793 /* Figure out the index type for the array. */
7795 itype = compute_array_index_type (name, size, tf_warning_or_error);
7798 T is called the array element type; this type shall not be [...] an
7799 abstract class type. */
7800 abstract_virtuals_error (name, type);
7802 return build_cplus_array_type (type, itype);
7805 /* Check that it's OK to declare a function with the indicated TYPE.
7806 SFK indicates the kind of special function (if any) that this
7807 function is. OPTYPE is the type given in a conversion operator
7808 declaration, or the class type for a constructor/destructor.
7809 Returns the actual return type of the function; that
7810 may be different than TYPE if an error occurs, or for certain
7811 special functions. */
7814 check_special_function_return_type (special_function_kind sfk,
7820 case sfk_constructor:
7822 error ("return type specification for constructor invalid");
7824 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7825 type = build_pointer_type (optype);
7827 type = void_type_node;
7830 case sfk_destructor:
7832 error ("return type specification for destructor invalid");
7833 /* We can't use the proper return type here because we run into
7834 problems with ambiguous bases and covariant returns.
7835 Java classes are left unchanged because (void *) isn't a valid
7836 Java type, and we don't want to change the Java ABI. */
7837 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7838 type = build_pointer_type (void_type_node);
7840 type = void_type_node;
7843 case sfk_conversion:
7845 error ("return type specified for %<operator %T%>", optype);
7856 /* A variable or data member (whose unqualified name is IDENTIFIER)
7857 has been declared with the indicated TYPE. If the TYPE is not
7858 acceptable, issue an error message and return a type to use for
7859 error-recovery purposes. */
7862 check_var_type (tree identifier, tree type)
7864 if (VOID_TYPE_P (type))
7867 error ("unnamed variable or field declared void");
7868 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7870 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7871 error ("variable or field %qE declared void", identifier);
7874 error ("variable or field declared void");
7875 type = error_mark_node;
7881 /* Given declspecs and a declarator (abstract or otherwise), determine
7882 the name and type of the object declared and construct a DECL node
7885 DECLSPECS points to the representation of declaration-specifier
7886 sequence that precedes declarator.
7888 DECL_CONTEXT says which syntactic context this declaration is in:
7889 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7890 FUNCDEF for a function definition. Like NORMAL but a few different
7891 error messages in each case. Return value may be zero meaning
7892 this definition is too screwy to try to parse.
7893 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7894 handle member functions (which have FIELD context).
7895 Return value may be zero meaning this definition is too screwy to
7897 PARM for a parameter declaration (either within a function prototype
7898 or before a function body). Make a PARM_DECL, or return void_type_node.
7899 TPARM for a template parameter declaration.
7900 CATCHPARM for a parameter declaration before a catch clause.
7901 TYPENAME if for a typename (in a cast or sizeof).
7902 Don't make a DECL node; just return the ..._TYPE node.
7903 FIELD for a struct or union field; make a FIELD_DECL.
7904 BITFIELD for a field with specified width.
7906 INITIALIZED is as for start_decl.
7908 ATTRLIST is a pointer to the list of attributes, which may be NULL
7909 if there are none; *ATTRLIST may be modified if attributes from inside
7910 the declarator should be applied to the declaration.
7912 When this function is called, scoping variables (such as
7913 CURRENT_CLASS_TYPE) should reflect the scope in which the
7914 declaration occurs, not the scope in which the new declaration will
7915 be placed. For example, on:
7919 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7922 Returns a DECL (if a declarator is present), a TYPE (if there is no
7923 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7927 grokdeclarator (const cp_declarator *declarator,
7928 const cp_decl_specifier_seq *declspecs,
7929 enum decl_context decl_context,
7933 tree type = NULL_TREE;
7935 int explicit_int128 = 0;
7936 int virtualp, explicitp, friendp, inlinep, staticp;
7937 int explicit_int = 0;
7938 int explicit_char = 0;
7939 int defaulted_int = 0;
7940 tree dependent_name = NULL_TREE;
7942 tree typedef_decl = NULL_TREE;
7943 const char *name = NULL;
7944 tree typedef_type = NULL_TREE;
7945 /* True if this declarator is a function definition. */
7946 bool funcdef_flag = false;
7947 cp_declarator_kind innermost_code = cdk_error;
7950 /* See the code below that used this. */
7951 tree decl_attr = NULL_TREE;
7954 /* Keep track of what sort of function is being processed
7955 so that we can warn about default return values, or explicit
7956 return values which do not match prescribed defaults. */
7957 special_function_kind sfk = sfk_none;
7959 tree dname = NULL_TREE;
7960 tree ctor_return_type = NULL_TREE;
7961 enum overload_flags flags = NO_SPECIAL;
7962 /* cv-qualifiers that apply to the declarator, for a declaration of
7963 a member function. */
7964 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7965 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7967 tree raises = NULL_TREE;
7968 int template_count = 0;
7969 tree returned_attrs = NULL_TREE;
7970 tree parms = NULL_TREE;
7971 const cp_declarator *id_declarator;
7972 /* The unqualified name of the declarator; either an
7973 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7974 tree unqualified_id;
7975 /* The class type, if any, in which this entity is located,
7976 or NULL_TREE if none. Note that this value may be different from
7977 the current class type; for example if an attempt is made to declare
7978 "A::f" inside "B", this value will be "A". */
7979 tree ctype = current_class_type;
7980 /* The NAMESPACE_DECL for the namespace in which this entity is
7981 located. If an unqualified name is used to declare the entity,
7982 this value will be NULL_TREE, even if the entity is located at
7984 tree in_namespace = NULL_TREE;
7985 cp_storage_class storage_class;
7986 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7987 bool type_was_error_mark_node = false;
7988 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7989 bool template_type_arg = false;
7990 bool template_parm_flag = false;
7991 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7994 signed_p = declspecs->specs[(int)ds_signed];
7995 unsigned_p = declspecs->specs[(int)ds_unsigned];
7996 short_p = declspecs->specs[(int)ds_short];
7997 long_p = declspecs->specs[(int)ds_long];
7998 longlong = declspecs->specs[(int)ds_long] >= 2;
7999 explicit_int128 = declspecs->explicit_int128_p;
8000 thread_p = declspecs->specs[(int)ds_thread];
8002 if (decl_context == FUNCDEF)
8003 funcdef_flag = true, decl_context = NORMAL;
8004 else if (decl_context == MEMFUNCDEF)
8005 funcdef_flag = true, decl_context = FIELD;
8006 else if (decl_context == BITFIELD)
8007 bitfield = 1, decl_context = FIELD;
8008 else if (decl_context == TEMPLATE_TYPE_ARG)
8009 template_type_arg = true, decl_context = TYPENAME;
8010 else if (decl_context == TPARM)
8011 template_parm_flag = true, decl_context = PARM;
8013 if (initialized > 1)
8014 funcdef_flag = true;
8016 /* Look inside a declarator for the name being declared
8017 and get it as a string, for an error message. */
8018 for (id_declarator = declarator;
8020 id_declarator = id_declarator->declarator)
8022 if (id_declarator->kind != cdk_id)
8023 innermost_code = id_declarator->kind;
8025 switch (id_declarator->kind)
8028 if (id_declarator->declarator
8029 && id_declarator->declarator->kind == cdk_id)
8031 sfk = id_declarator->declarator->u.id.sfk;
8032 if (sfk == sfk_destructor)
8039 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8040 tree decl = id_declarator->u.id.unqualified_name;
8043 if (qualifying_scope)
8045 if (at_function_scope_p ())
8049 A declarator-id shall not be qualified except
8052 None of the cases are permitted in block
8054 if (qualifying_scope == global_namespace)
8055 error ("invalid use of qualified-name %<::%D%>",
8057 else if (TYPE_P (qualifying_scope))
8058 error ("invalid use of qualified-name %<%T::%D%>",
8059 qualifying_scope, decl);
8061 error ("invalid use of qualified-name %<%D::%D%>",
8062 qualifying_scope, decl);
8063 return error_mark_node;
8065 else if (TYPE_P (qualifying_scope))
8067 ctype = qualifying_scope;
8068 if (innermost_code != cdk_function
8069 && current_class_type
8070 && !UNIQUELY_DERIVED_FROM_P (ctype,
8071 current_class_type))
8073 error ("type %qT is not derived from type %qT",
8074 ctype, current_class_type);
8075 return error_mark_node;
8078 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8079 in_namespace = qualifying_scope;
8081 switch (TREE_CODE (decl))
8087 if (innermost_code != cdk_function)
8089 error ("declaration of %qD as non-function", decl);
8090 return error_mark_node;
8092 else if (!qualifying_scope
8093 && !(current_class_type && at_class_scope_p ()))
8095 error ("declaration of %qD as non-member", decl);
8096 return error_mark_node;
8099 type = TREE_OPERAND (decl, 0);
8101 type = constructor_name (type);
8102 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8107 case TEMPLATE_ID_EXPR:
8109 tree fns = TREE_OPERAND (decl, 0);
8112 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8114 gcc_assert (is_overloaded_fn (dname));
8115 dname = DECL_NAME (get_first_fn (dname));
8120 case IDENTIFIER_NODE:
8121 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8124 if (C_IS_RESERVED_WORD (dname))
8126 error ("declarator-id missing; using reserved word %qD",
8128 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8130 else if (!IDENTIFIER_TYPENAME_P (dname))
8131 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8134 gcc_assert (flags == NO_SPECIAL);
8135 flags = TYPENAME_FLAG;
8136 ctor_return_type = TREE_TYPE (dname);
8137 sfk = sfk_conversion;
8138 if (is_typename_at_global_scope (dname))
8139 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8141 name = "<invalid operator>";
8158 return error_mark_node;
8163 if (id_declarator->kind == cdk_id)
8169 The declarator in a function-definition shall have the form
8170 D1 ( parameter-declaration-clause) ... */
8171 if (funcdef_flag && innermost_code != cdk_function)
8173 error ("function definition does not declare parameters");
8174 return error_mark_node;
8177 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8178 && innermost_code != cdk_function
8179 && ! (ctype && !declspecs->any_specifiers_p))
8181 error ("declaration of %qD as non-function", dname);
8182 return error_mark_node;
8185 /* Anything declared one level down from the top level
8186 must be one of the parameters of a function
8187 (because the body is at least two levels down). */
8189 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8190 by not allowing C++ class definitions to specify their parameters
8191 with xdecls (must be spec.d in the parmlist).
8193 Since we now wait to push a class scope until we are sure that
8194 we are in a legitimate method context, we must set oldcname
8195 explicitly (since current_class_name is not yet alive).
8197 We also want to avoid calling this a PARM if it is in a namespace. */
8199 if (decl_context == NORMAL && !toplevel_bindings_p ())
8201 struct cp_binding_level *b = current_binding_level;
8202 current_binding_level = b->level_chain;
8203 if (current_binding_level != 0 && toplevel_bindings_p ())
8204 decl_context = PARM;
8205 current_binding_level = b;
8209 name = decl_context == PARM ? "parameter" : "type name";
8211 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8213 error ("%<constexpr%> cannot appear in a typedef declaration");
8214 return error_mark_node;
8217 /* If there were multiple types specified in the decl-specifier-seq,
8218 issue an error message. */
8219 if (declspecs->multiple_types_p)
8221 error ("two or more data types in declaration of %qs", name);
8222 return error_mark_node;
8225 if (declspecs->conflicting_specifiers_p)
8227 error ("conflicting specifiers in declaration of %qs", name);
8228 return error_mark_node;
8231 /* Extract the basic type from the decl-specifier-seq. */
8232 type = declspecs->type;
8233 if (type == error_mark_node)
8236 type_was_error_mark_node = true;
8238 /* If the entire declaration is itself tagged as deprecated then
8239 suppress reports of deprecated items. */
8240 if (type && TREE_DEPRECATED (type)
8241 && deprecated_state != DEPRECATED_SUPPRESS)
8242 warn_deprecated_use (type, NULL_TREE);
8243 if (type && TREE_CODE (type) == TYPE_DECL)
8245 typedef_decl = type;
8246 type = TREE_TYPE (typedef_decl);
8247 if (TREE_DEPRECATED (type)
8248 && DECL_ARTIFICIAL (typedef_decl)
8249 && deprecated_state != DEPRECATED_SUPPRESS)
8250 warn_deprecated_use (type, NULL_TREE);
8252 /* No type at all: default to `int', and set DEFAULTED_INT
8253 because it was not a user-defined typedef. */
8254 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8256 /* These imply 'int'. */
8257 type = integer_type_node;
8261 explicit_int = declspecs->explicit_int_p;
8262 explicit_char = declspecs->explicit_char_p;
8265 /* See the code below that used this. */
8267 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8269 typedef_type = type;
8272 if (sfk != sfk_conversion)
8273 ctor_return_type = ctype;
8275 if (sfk != sfk_none)
8276 type = check_special_function_return_type (sfk, type,
8278 else if (type == NULL_TREE)
8284 /* We handle `main' specially here, because 'main () { }' is so
8285 common. With no options, it is allowed. With -Wreturn-type,
8286 it is a warning. It is only an error with -pedantic-errors. */
8287 is_main = (funcdef_flag
8288 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8289 && MAIN_NAME_P (dname)
8290 && ctype == NULL_TREE
8291 && in_namespace == NULL_TREE
8292 && current_namespace == global_namespace);
8294 if (type_was_error_mark_node)
8295 /* We've already issued an error, don't complain more. */;
8296 else if (in_system_header || flag_ms_extensions)
8297 /* Allow it, sigh. */;
8299 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8301 pedwarn (input_location, OPT_pedantic,
8302 "ISO C++ forbids declaration of %qs with no type", name);
8304 warning (OPT_Wreturn_type,
8305 "ISO C++ forbids declaration of %qs with no type", name);
8307 type = integer_type_node;
8312 /* Now process the modifiers that were specified
8313 and check for invalid combinations. */
8315 /* Long double is a special combination. */
8316 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8319 type = cp_build_qualified_type (long_double_type_node,
8320 cp_type_quals (type));
8323 /* Check all other uses of type modifiers. */
8325 if (unsigned_p || signed_p || long_p || short_p)
8329 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8330 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8331 else if (signed_p && unsigned_p)
8332 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8333 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8334 error ("%<long long%> invalid for %qs", name);
8335 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8336 error ("%<__int128%> invalid for %qs", name);
8337 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8338 error ("%<long%> invalid for %qs", name);
8339 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8340 error ("%<short%> invalid for %qs", name);
8341 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8342 error ("%<long%> or %<short%> invalid for %qs", name);
8343 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8344 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8345 else if ((long_p || short_p) && explicit_char)
8346 error ("%<long%> or %<short%> specified with char for %qs", name);
8347 else if (long_p && short_p)
8348 error ("%<long%> and %<short%> specified together for %qs", name);
8349 else if (type == char16_type_node || type == char32_type_node)
8351 if (signed_p || unsigned_p)
8352 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8353 else if (short_p || long_p)
8354 error ("%<short%> or %<long%> invalid for %qs", name);
8359 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8361 pedwarn (input_location, OPT_pedantic,
8362 "long, short, signed or unsigned used invalidly for %qs",
8364 if (flag_pedantic_errors)
8367 if (explicit_int128)
8369 if (int128_integer_type_node == NULL_TREE)
8371 error ("%<__int128%> is not supported by this target");
8376 pedwarn (input_location, OPT_pedantic,
8377 "ISO C++ does not support %<__int128%> for %qs",
8379 if (flag_pedantic_errors)
8385 /* Discard the type modifiers if they are invalid. */
8393 explicit_int128 = false;
8397 /* Decide whether an integer type is signed or not.
8398 Optionally treat bitfields as signed by default. */
8402 It is implementation-defined whether a plain (neither
8403 explicitly signed or unsigned) char, short, int, or long
8404 bit-field is signed or unsigned.
8406 Naturally, we extend this to long long as well. Note that
8407 this does not include wchar_t. */
8408 || (bitfield && !flag_signed_bitfields
8410 /* A typedef for plain `int' without `signed' can be
8411 controlled just like plain `int', but a typedef for
8412 `signed int' cannot be so controlled. */
8414 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8415 && TREE_CODE (type) == INTEGER_TYPE
8416 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8418 if (explicit_int128)
8419 type = int128_unsigned_type_node;
8421 type = long_long_unsigned_type_node;
8423 type = long_unsigned_type_node;
8425 type = short_unsigned_type_node;
8426 else if (type == char_type_node)
8427 type = unsigned_char_type_node;
8428 else if (typedef_decl)
8429 type = unsigned_type_for (type);
8431 type = unsigned_type_node;
8433 else if (signed_p && type == char_type_node)
8434 type = signed_char_type_node;
8435 else if (explicit_int128)
8436 type = int128_integer_type_node;
8438 type = long_long_integer_type_node;
8440 type = long_integer_type_node;
8442 type = short_integer_type_node;
8444 if (declspecs->specs[(int)ds_complex])
8446 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8447 error ("complex invalid for %qs", name);
8448 /* If we just have "complex", it is equivalent to
8449 "complex double", but if any modifiers at all are specified it is
8450 the complex form of TYPE. E.g, "complex short" is
8451 "complex short int". */
8452 else if (defaulted_int && ! longlong && ! explicit_int128
8453 && ! (long_p || short_p || signed_p || unsigned_p))
8454 type = complex_double_type_node;
8455 else if (type == integer_type_node)
8456 type = complex_integer_type_node;
8457 else if (type == float_type_node)
8458 type = complex_float_type_node;
8459 else if (type == double_type_node)
8460 type = complex_double_type_node;
8461 else if (type == long_double_type_node)
8462 type = complex_long_double_type_node;
8464 type = build_complex_type (type);
8467 type_quals = TYPE_UNQUALIFIED;
8468 if (declspecs->specs[(int)ds_const])
8469 type_quals |= TYPE_QUAL_CONST;
8470 if (declspecs->specs[(int)ds_volatile])
8471 type_quals |= TYPE_QUAL_VOLATILE;
8472 if (declspecs->specs[(int)ds_restrict])
8473 type_quals |= TYPE_QUAL_RESTRICT;
8474 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8475 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8478 type_quals |= cp_type_quals (type);
8479 type = cp_build_qualified_type_real
8480 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8481 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8482 /* We might have ignored or rejected some of the qualifiers. */
8483 type_quals = cp_type_quals (type);
8486 inlinep = !! declspecs->specs[(int)ds_inline];
8487 virtualp = !! declspecs->specs[(int)ds_virtual];
8488 explicitp = !! declspecs->specs[(int)ds_explicit];
8490 storage_class = declspecs->storage_class;
8491 if (storage_class == sc_static)
8492 staticp = 1 + (decl_context == FIELD);
8494 if (virtualp && staticp == 2)
8496 error ("member %qD cannot be declared both virtual and static", dname);
8497 storage_class = sc_none;
8500 friendp = !! declspecs->specs[(int)ds_friend];
8502 if (dependent_name && !friendp)
8504 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8505 return error_mark_node;
8508 /* Issue errors about use of storage classes for parameters. */
8509 if (decl_context == PARM)
8511 if (declspecs->specs[(int)ds_typedef])
8513 error ("typedef declaration invalid in parameter declaration");
8514 return error_mark_node;
8516 else if (template_parm_flag && storage_class != sc_none)
8518 error ("storage class specified for template parameter %qs", name);
8519 return error_mark_node;
8521 else if (storage_class == sc_static
8522 || storage_class == sc_extern
8524 error ("storage class specifiers invalid in parameter declarations");
8526 if (type_uses_auto (type))
8528 error ("parameter declared %<auto%>");
8529 type = error_mark_node;
8532 /* Function parameters cannot be constexpr. If we saw one, moan
8533 and pretend it wasn't there. */
8536 error ("a parameter cannot be declared %<constexpr%>");
8541 /* Give error if `virtual' is used outside of class declaration. */
8543 && (current_class_name == NULL_TREE || decl_context != FIELD))
8545 error ("%<virtual%> outside class declaration");
8549 /* Static anonymous unions are dealt with here. */
8550 if (staticp && decl_context == TYPENAME
8552 && ANON_AGGR_TYPE_P (declspecs->type))
8553 decl_context = FIELD;
8555 /* Warn about storage classes that are invalid for certain
8556 kinds of declarations (parameters, typenames, etc.). */
8559 && storage_class != sc_extern
8560 && storage_class != sc_static)
8561 || declspecs->specs[(int)ds_typedef]))
8563 error ("multiple storage classes in declaration of %qs", name);
8566 if (decl_context != NORMAL
8567 && ((storage_class != sc_none
8568 && storage_class != sc_mutable)
8571 if ((decl_context == PARM || decl_context == CATCHPARM)
8572 && (storage_class == sc_register
8573 || storage_class == sc_auto))
8575 else if (declspecs->specs[(int)ds_typedef])
8577 else if (decl_context == FIELD
8578 /* C++ allows static class elements. */
8579 && storage_class == sc_static)
8580 /* C++ also allows inlines and signed and unsigned elements,
8581 but in those cases we don't come in here. */
8585 if (decl_context == FIELD)
8586 error ("storage class specified for %qs", name);
8589 if (decl_context == PARM || decl_context == CATCHPARM)
8590 error ("storage class specified for parameter %qs", name);
8592 error ("storage class specified for typename");
8594 if (storage_class == sc_register
8595 || storage_class == sc_auto
8596 || storage_class == sc_extern
8598 storage_class = sc_none;
8601 else if (storage_class == sc_extern && funcdef_flag
8602 && ! toplevel_bindings_p ())
8603 error ("nested function %qs declared %<extern%>", name);
8604 else if (toplevel_bindings_p ())
8606 if (storage_class == sc_auto)
8607 error ("top-level declaration of %qs specifies %<auto%>", name);
8610 && storage_class != sc_extern
8611 && storage_class != sc_static)
8613 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8618 if (storage_class && friendp)
8620 error ("storage class specifiers invalid in friend function declarations");
8621 storage_class = sc_none;
8626 unqualified_id = NULL_TREE;
8629 unqualified_id = id_declarator->u.id.unqualified_name;
8630 switch (TREE_CODE (unqualified_id))
8633 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8634 if (TYPE_P (unqualified_id))
8635 unqualified_id = constructor_name (unqualified_id);
8638 case IDENTIFIER_NODE:
8639 case TEMPLATE_ID_EXPR:
8647 /* Determine the type of the entity declared by recurring on the
8649 for (; declarator; declarator = declarator->declarator)
8651 const cp_declarator *inner_declarator;
8654 if (type == error_mark_node)
8655 return error_mark_node;
8657 attrs = declarator->attributes;
8663 if (declarator == NULL || declarator->kind == cdk_id)
8664 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8665 if (declarator->kind == cdk_function)
8666 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8667 if (declarator->kind == cdk_array)
8668 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8669 returned_attrs = decl_attributes (&type,
8670 chainon (returned_attrs, attrs),
8674 if (declarator->kind == cdk_id)
8677 inner_declarator = declarator->declarator;
8679 switch (declarator->kind)
8682 type = create_array_type_for_decl (dname, type,
8683 declarator->u.array.bounds);
8691 /* Declaring a function type.
8692 Make sure we have a valid type for the function to return. */
8694 if (type_quals != TYPE_UNQUALIFIED)
8696 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8697 warning (OPT_Wignored_qualifiers,
8698 "type qualifiers ignored on function return type");
8699 /* We now know that the TYPE_QUALS don't apply to the
8700 decl, but to its return type. */
8701 type_quals = TYPE_UNQUALIFIED;
8703 errmsg = targetm.invalid_return_type (type);
8707 type = integer_type_node;
8710 /* Error about some types functions can't return. */
8712 if (TREE_CODE (type) == FUNCTION_TYPE)
8714 error ("%qs declared as function returning a function", name);
8715 return error_mark_node;
8717 if (TREE_CODE (type) == ARRAY_TYPE)
8719 error ("%qs declared as function returning an array", name);
8720 return error_mark_node;
8723 /* Pick up type qualifiers which should be applied to `this'. */
8724 memfn_quals = declarator->u.function.qualifiers;
8726 /* Pick up the exception specifications. */
8727 raises = declarator->u.function.exception_specification;
8729 /* Say it's a definition only for the CALL_EXPR
8730 closest to the identifier. */
8731 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8733 /* Handle a late-specified return type. */
8736 if (type_uses_auto (type))
8738 if (!declarator->u.function.late_return_type)
8740 error ("%qs function uses %<auto%> type specifier without"
8741 " late return type", name);
8742 return error_mark_node;
8744 else if (!is_auto (type))
8746 error ("%qs function with late return type has"
8747 " %qT as its type rather than plain %<auto%>",
8749 return error_mark_node;
8752 else if (declarator->u.function.late_return_type)
8754 error ("%qs function with late return type not declared"
8755 " with %<auto%> type specifier", name);
8756 return error_mark_node;
8759 type = splice_late_return_type
8760 (type, declarator->u.function.late_return_type);
8761 if (type == error_mark_node)
8762 return error_mark_node;
8764 if (ctype == NULL_TREE
8765 && decl_context == FIELD
8767 && (friendp == 0 || dname == current_class_name))
8768 ctype = current_class_type;
8770 if (ctype && (sfk == sfk_constructor
8771 || sfk == sfk_destructor))
8773 /* We are within a class's scope. If our declarator name
8774 is the same as the class name, and we are defining
8775 a function, then it is a constructor/destructor, and
8776 therefore returns a void type. */
8778 /* ISO C++ 12.4/2. A destructor may not be declared
8779 const or volatile. A destructor may not be
8782 ISO C++ 12.1. A constructor may not be declared
8783 const or volatile. A constructor may not be
8784 virtual. A constructor may not be static. */
8786 error ((flags == DTOR_FLAG)
8787 ? "destructor cannot be static member function"
8788 : "constructor cannot be static member function");
8791 error ((flags == DTOR_FLAG)
8792 ? "destructors may not be cv-qualified"
8793 : "constructors may not be cv-qualified");
8794 memfn_quals = TYPE_UNQUALIFIED;
8797 if (decl_context == FIELD
8798 && !member_function_or_else (ctype,
8801 return error_mark_node;
8803 if (flags != DTOR_FLAG)
8805 /* It's a constructor. */
8810 permerror (input_location, "constructors cannot be declared virtual");
8813 if (decl_context == FIELD
8814 && sfk != sfk_constructor)
8815 return error_mark_node;
8817 if (decl_context == FIELD)
8823 error ("can%'t initialize friend function %qs", name);
8826 /* Cannot be both friend and virtual. */
8827 error ("virtual functions cannot be friends");
8830 if (decl_context == NORMAL)
8831 error ("friend declaration not in class definition");
8832 if (current_function_decl && funcdef_flag)
8833 error ("can%'t define friend function %qs in a local "
8837 else if (ctype && sfk == sfk_conversion)
8841 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8846 arg_types = grokparms (declarator->u.function.parameters,
8849 if (inner_declarator
8850 && inner_declarator->kind == cdk_id
8851 && inner_declarator->u.id.sfk == sfk_destructor
8852 && arg_types != void_list_node)
8854 error ("destructors may not have parameters");
8855 arg_types = void_list_node;
8859 type = build_function_type (type, arg_types);
8866 /* Filter out pointers-to-references and references-to-references.
8867 We can get these if a TYPE_DECL is used. */
8869 if (TREE_CODE (type) == REFERENCE_TYPE)
8871 if (declarator->kind != cdk_reference)
8873 error ("cannot declare pointer to %q#T", type);
8874 type = TREE_TYPE (type);
8877 /* In C++0x, we allow reference to reference declarations
8878 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8879 and template type arguments [14.3.1/4 temp.arg.type]. The
8880 check for direct reference to reference declarations, which
8881 are still forbidden, occurs below. Reasoning behind the change
8882 can be found in DR106, DR540, and the rvalue reference
8884 else if (cxx_dialect == cxx98)
8886 error ("cannot declare reference to %q#T", type);
8887 type = TREE_TYPE (type);
8890 else if (VOID_TYPE_P (type))
8892 if (declarator->kind == cdk_reference)
8893 error ("cannot declare reference to %q#T", type);
8894 else if (declarator->kind == cdk_ptrmem)
8895 error ("cannot declare pointer to %q#T member", type);
8898 /* We now know that the TYPE_QUALS don't apply to the decl,
8899 but to the target of the pointer. */
8900 type_quals = TYPE_UNQUALIFIED;
8902 if (declarator->kind == cdk_ptrmem
8903 && (TREE_CODE (type) == FUNCTION_TYPE
8904 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8906 memfn_quals |= type_memfn_quals (type);
8907 type = build_memfn_type (type,
8908 declarator->u.pointer.class_type,
8910 if (type == error_mark_node)
8911 return error_mark_node;
8912 memfn_quals = TYPE_UNQUALIFIED;
8915 if (TREE_CODE (type) == FUNCTION_TYPE
8916 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
8917 error (declarator->kind == cdk_reference
8918 ? G_("cannot declare reference to qualified function type %qT")
8919 : G_("cannot declare pointer to qualified function type %qT"),
8922 /* When the pointed-to type involves components of variable size,
8923 care must be taken to ensure that the size evaluation code is
8924 emitted early enough to dominate all the possible later uses
8925 and late enough for the variables on which it depends to have
8928 This is expected to happen automatically when the pointed-to
8929 type has a name/declaration of it's own, but special attention
8930 is required if the type is anonymous.
8932 We handle the NORMAL and FIELD contexts here by inserting a
8933 dummy statement that just evaluates the size at a safe point
8934 and ensures it is not deferred until e.g. within a deeper
8935 conditional context (c++/43555).
8937 We expect nothing to be needed here for PARM or TYPENAME.
8938 Evaluating the size at this point for TYPENAME would
8939 actually be incorrect, as we might be in the middle of an
8940 expression with side effects on the pointed-to type size
8941 "arguments" prior to the pointer declaration point and the
8942 size evaluation could end up prior to the side effects. */
8944 if (!TYPE_NAME (type)
8945 && (decl_context == NORMAL || decl_context == FIELD)
8946 && at_function_scope_p ()
8947 && variably_modified_type_p (type, NULL_TREE))
8948 finish_expr_stmt (TYPE_SIZE (type));
8950 if (declarator->kind == cdk_reference)
8952 /* In C++0x, the type we are creating a reference to might be
8953 a typedef which is itself a reference type. In that case,
8954 we follow the reference collapsing rules in
8955 [7.1.3/8 dcl.typedef] to create the final reference type:
8957 "If a typedef TD names a type that is a reference to a type
8958 T, an attempt to create the type 'lvalue reference to cv TD'
8959 creates the type 'lvalue reference to T,' while an attempt
8960 to create the type "rvalue reference to cv TD' creates the
8963 if (!VOID_TYPE_P (type))
8964 type = cp_build_reference_type
8965 ((TREE_CODE (type) == REFERENCE_TYPE
8966 ? TREE_TYPE (type) : type),
8967 (declarator->u.reference.rvalue_ref
8968 && (TREE_CODE(type) != REFERENCE_TYPE
8969 || TYPE_REF_IS_RVALUE (type))));
8971 /* In C++0x, we need this check for direct reference to
8972 reference declarations, which are forbidden by
8973 [8.3.2/5 dcl.ref]. Reference to reference declarations
8974 are only allowed indirectly through typedefs and template
8975 type arguments. Example:
8977 void foo(int & &); // invalid ref-to-ref decl
8979 typedef int & int_ref;
8980 void foo(int_ref &); // valid ref-to-ref decl
8982 if (inner_declarator && inner_declarator->kind == cdk_reference)
8983 error ("cannot declare reference to %q#T, which is not "
8984 "a typedef or a template type argument", type);
8986 else if (TREE_CODE (type) == METHOD_TYPE)
8987 type = build_ptrmemfunc_type (build_pointer_type (type));
8988 else if (declarator->kind == cdk_ptrmem)
8990 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8992 if (declarator->u.pointer.class_type == error_mark_node)
8993 /* We will already have complained. */
8994 type = error_mark_node;
8996 type = build_ptrmem_type (declarator->u.pointer.class_type,
9000 type = build_pointer_type (type);
9002 /* Process a list of type modifier keywords (such as
9003 const or volatile) that were given inside the `*' or `&'. */
9005 if (declarator->u.pointer.qualifiers)
9008 = cp_build_qualified_type (type,
9009 declarator->u.pointer.qualifiers);
9010 type_quals = cp_type_quals (type);
9023 /* A `constexpr' specifier used in an object declaration declares
9024 the object as `const'. */
9025 if (constexpr_p && innermost_code != cdk_function)
9027 if (type_quals & TYPE_QUAL_CONST)
9028 error ("both %<const%> and %<constexpr%> cannot be used here");
9029 if (type_quals & TYPE_QUAL_VOLATILE)
9030 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9031 type_quals |= TYPE_QUAL_CONST;
9032 type = cp_build_qualified_type (type, type_quals);
9035 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9036 && TREE_CODE (type) != FUNCTION_TYPE
9037 && TREE_CODE (type) != METHOD_TYPE)
9039 error ("template-id %qD used as a declarator",
9041 unqualified_id = dname;
9044 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9045 qualified with a class-name, turn it into a METHOD_TYPE, unless
9046 we know that the function is static. We take advantage of this
9047 opportunity to do other processing that pertains to entities
9048 explicitly declared to be class members. Note that if DECLARATOR
9049 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9050 would not have exited the loop above. */
9052 && declarator->u.id.qualifying_scope
9053 && TYPE_P (declarator->u.id.qualifying_scope))
9057 ctype = declarator->u.id.qualifying_scope;
9058 ctype = TYPE_MAIN_VARIANT (ctype);
9060 while (t != NULL_TREE && CLASS_TYPE_P (t))
9062 /* You're supposed to have one `template <...>' for every
9063 template class, but you don't need one for a full
9064 specialization. For example:
9066 template <class T> struct S{};
9067 template <> struct S<int> { void f(); };
9068 void S<int>::f () {}
9070 is correct; there shouldn't be a `template <>' for the
9071 definition of `S<int>::f'. */
9072 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9073 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9074 /* T is an explicit (not partial) specialization. All
9075 containing classes must therefore also be explicitly
9078 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9079 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9080 template_count += 1;
9082 t = TYPE_MAIN_DECL (t);
9083 t = DECL_CONTEXT (t);
9086 if (ctype == current_class_type)
9090 permerror (input_location, "member functions are implicitly friends of their class");
9094 permerror (declarator->id_loc,
9095 "extra qualification %<%T::%> on member %qs",
9098 else if (/* If the qualifying type is already complete, then we
9099 can skip the following checks. */
9100 !COMPLETE_TYPE_P (ctype)
9101 && (/* If the function is being defined, then
9102 qualifying type must certainly be complete. */
9104 /* A friend declaration of "T::f" is OK, even if
9105 "T" is a template parameter. But, if this
9106 function is not a friend, the qualifying type
9108 || (!friendp && !CLASS_TYPE_P (ctype))
9109 /* For a declaration, the type need not be
9110 complete, if either it is dependent (since there
9111 is no meaningful definition of complete in that
9112 case) or the qualifying class is currently being
9114 || !(dependent_type_p (ctype)
9115 || currently_open_class (ctype)))
9116 /* Check that the qualifying type is complete. */
9117 && !complete_type_or_else (ctype, NULL_TREE))
9118 return error_mark_node;
9119 else if (TREE_CODE (type) == FUNCTION_TYPE)
9121 if (current_class_type
9122 && (!friendp || funcdef_flag))
9125 ? "cannot define member function %<%T::%s%> within %<%T%>"
9126 : "cannot declare member function %<%T::%s%> within %<%T%>",
9127 ctype, name, current_class_type);
9128 return error_mark_node;
9131 else if (declspecs->specs[(int)ds_typedef]
9132 && current_class_type)
9134 error ("cannot declare member %<%T::%s%> within %qT",
9135 ctype, name, current_class_type);
9136 return error_mark_node;
9140 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9141 ctype = current_class_type;
9143 /* A constexpr non-static member function is implicitly const. */
9144 if (constexpr_p && ctype && staticp == 0
9145 && TREE_CODE (type) == FUNCTION_TYPE
9146 && sfk != sfk_constructor && sfk != sfk_destructor)
9147 memfn_quals |= TYPE_QUAL_CONST;
9149 /* Now TYPE has the actual type. */
9154 *attrlist = chainon (returned_attrs, *attrlist);
9156 attrlist = &returned_attrs;
9159 /* Handle parameter packs. */
9160 if (parameter_pack_p)
9162 if (decl_context == PARM)
9163 /* Turn the type into a pack expansion.*/
9164 type = make_pack_expansion (type);
9166 error ("non-parameter %qs cannot be a parameter pack", name);
9169 /* Did array size calculations overflow? */
9171 if (TREE_CODE (type) == ARRAY_TYPE
9172 && COMPLETE_TYPE_P (type)
9173 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9174 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9176 error ("size of array %qs is too large", name);
9177 /* If we proceed with the array type as it is, we'll eventually
9178 crash in tree_low_cst(). */
9179 type = error_mark_node;
9182 if ((decl_context == FIELD || decl_context == PARM)
9183 && !processing_template_decl
9184 && variably_modified_type_p (type, NULL_TREE))
9186 if (decl_context == FIELD)
9187 error ("data member may not have variably modified type %qT", type);
9189 error ("parameter may not have variably modified type %qT", type);
9190 type = error_mark_node;
9193 if (explicitp == 1 || (explicitp && friendp))
9195 /* [dcl.fct.spec] The explicit specifier shall only be used in
9196 declarations of constructors within a class definition. */
9197 error ("only declarations of constructors can be %<explicit%>");
9201 if (storage_class == sc_mutable)
9203 if (decl_context != FIELD || friendp)
9205 error ("non-member %qs cannot be declared %<mutable%>", name);
9206 storage_class = sc_none;
9208 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9210 error ("non-object member %qs cannot be declared %<mutable%>", name);
9211 storage_class = sc_none;
9213 else if (TREE_CODE (type) == FUNCTION_TYPE
9214 || TREE_CODE (type) == METHOD_TYPE)
9216 error ("function %qs cannot be declared %<mutable%>", name);
9217 storage_class = sc_none;
9221 error ("static %qs cannot be declared %<mutable%>", name);
9222 storage_class = sc_none;
9224 else if (type_quals & TYPE_QUAL_CONST)
9226 error ("const %qs cannot be declared %<mutable%>", name);
9227 storage_class = sc_none;
9229 else if (TREE_CODE (type) == REFERENCE_TYPE)
9231 permerror (input_location, "reference %qs cannot be declared "
9232 "%<mutable%>", name);
9233 storage_class = sc_none;
9237 /* If this is declaring a typedef name, return a TYPE_DECL. */
9238 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9242 /* Note that the grammar rejects storage classes
9243 in typenames, fields or parameters. */
9244 if (current_lang_name == lang_name_java)
9245 TYPE_FOR_JAVA (type) = 1;
9247 /* This declaration:
9249 typedef void f(int) const;
9251 declares a function type which is not a member of any
9252 particular class, but which is cv-qualified; for
9253 example "f S::*" declares a pointer to a const-qualified
9254 member function of S. We record the cv-qualification in the
9256 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9258 type = apply_memfn_quals (type, memfn_quals);
9260 /* We have now dealt with these qualifiers. */
9261 memfn_quals = TYPE_UNQUALIFIED;
9264 if (decl_context == FIELD)
9265 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9267 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9268 if (id_declarator && declarator->u.id.qualifying_scope) {
9269 error_at (DECL_SOURCE_LOCATION (decl),
9270 "typedef name may not be a nested-name-specifier");
9271 TREE_TYPE (decl) = error_mark_node;
9274 if (decl_context != FIELD)
9276 if (!current_function_decl)
9277 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9278 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9279 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9280 (current_function_decl)))
9281 /* The TYPE_DECL is "abstract" because there will be
9282 clones of this constructor/destructor, and there will
9283 be copies of this TYPE_DECL generated in those
9285 DECL_ABSTRACT (decl) = 1;
9287 else if (constructor_name_p (unqualified_id, current_class_type))
9288 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9289 "as enclosing class",
9292 /* If the user declares "typedef struct {...} foo" then the
9293 struct will have an anonymous name. Fill that name in now.
9294 Nothing can refer to it, so nothing needs know about the name
9296 if (type != error_mark_node
9299 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9300 && TYPE_ANONYMOUS_P (type)
9301 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9305 /* Replace the anonymous name with the real name everywhere. */
9306 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9308 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9309 /* We do not rename the debug info representing the
9310 anonymous tagged type because the standard says in
9311 [dcl.typedef] that the naming applies only for
9312 linkage purposes. */
9313 /*debug_hooks->set_name (t, decl);*/
9314 TYPE_NAME (t) = decl;
9317 if (TYPE_LANG_SPECIFIC (type))
9318 TYPE_WAS_ANONYMOUS (type) = 1;
9320 /* If this is a typedef within a template class, the nested
9321 type is a (non-primary) template. The name for the
9322 template needs updating as well. */
9323 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9324 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9325 = TYPE_IDENTIFIER (type);
9327 /* Adjust linkage now that we aren't anonymous anymore. */
9328 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9329 determine_visibility (TYPE_MAIN_DECL (type));
9331 /* FIXME remangle member functions; member functions of a
9332 type with external linkage have external linkage. */
9336 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9337 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9339 bad_specifiers (decl, BSP_TYPE, virtualp,
9340 memfn_quals != TYPE_UNQUALIFIED,
9341 inlinep, friendp, raises != NULL_TREE);
9346 /* Detect the case of an array type of unspecified size
9347 which came, as such, direct from a typedef name.
9348 We must copy the type, so that the array's domain can be
9349 individually set by the object's initializer. */
9351 if (type && typedef_type
9352 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9353 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9354 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9356 /* Detect where we're using a typedef of function type to declare a
9357 function. PARMS will not be set, so we must create it now. */
9359 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9361 tree decls = NULL_TREE;
9364 for (args = TYPE_ARG_TYPES (type);
9365 args && args != void_list_node;
9366 args = TREE_CHAIN (args))
9368 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9370 DECL_CHAIN (decl) = decls;
9374 parms = nreverse (decls);
9376 if (decl_context != TYPENAME)
9378 /* A cv-qualifier-seq shall only be part of the function type
9379 for a non-static member function. [8.3.5/4 dcl.fct] */
9380 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9381 && (current_class_type == NULL_TREE || staticp) )
9384 ? G_("qualified function types cannot be used to "
9385 "declare static member functions")
9386 : G_("qualified function types cannot be used to "
9387 "declare free functions"));
9388 type = TYPE_MAIN_VARIANT (type);
9391 /* The qualifiers on the function type become the qualifiers on
9392 the non-static member function. */
9393 memfn_quals |= type_memfn_quals (type);
9394 type_quals = TYPE_UNQUALIFIED;
9398 /* If this is a type name (such as, in a cast or sizeof),
9399 compute the type and return it now. */
9401 if (decl_context == TYPENAME)
9403 /* Note that the grammar rejects storage classes
9404 in typenames, fields or parameters. */
9405 if (type_quals != TYPE_UNQUALIFIED)
9406 type_quals = TYPE_UNQUALIFIED;
9408 /* Special case: "friend class foo" looks like a TYPENAME context. */
9411 if (type_quals != TYPE_UNQUALIFIED)
9413 error ("type qualifiers specified for friend class declaration");
9414 type_quals = TYPE_UNQUALIFIED;
9418 error ("%<inline%> specified for friend class declaration");
9424 /* Don't allow friend declaration without a class-key. */
9425 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9426 permerror (input_location, "template parameters cannot be friends");
9427 else if (TREE_CODE (type) == TYPENAME_TYPE)
9428 permerror (input_location, "friend declaration requires class-key, "
9429 "i.e. %<friend class %T::%D%>",
9430 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9432 permerror (input_location, "friend declaration requires class-key, "
9433 "i.e. %<friend %#T%>",
9437 /* Only try to do this stuff if we didn't already give up. */
9438 if (type != integer_type_node)
9440 /* A friendly class? */
9441 if (current_class_type)
9442 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9445 error ("trying to make class %qT a friend of global scope",
9448 type = void_type_node;
9451 else if (memfn_quals)
9453 if (ctype == NULL_TREE
9454 && TREE_CODE (type) == METHOD_TYPE)
9455 ctype = TYPE_METHOD_BASETYPE (type);
9458 type = build_memfn_type (type, ctype, memfn_quals);
9459 /* Core issue #547: need to allow this in template type args. */
9460 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9461 type = apply_memfn_quals (type, memfn_quals);
9463 error ("invalid qualifiers on non-member function type");
9468 else if (unqualified_id == NULL_TREE && decl_context != PARM
9469 && decl_context != CATCHPARM
9470 && TREE_CODE (type) != UNION_TYPE
9473 error ("abstract declarator %qT used as declaration", type);
9474 return error_mark_node;
9477 /* Only functions may be declared using an operator-function-id. */
9479 && IDENTIFIER_OPNAME_P (unqualified_id)
9480 && TREE_CODE (type) != FUNCTION_TYPE
9481 && TREE_CODE (type) != METHOD_TYPE)
9483 error ("declaration of %qD as non-function", unqualified_id);
9484 return error_mark_node;
9487 /* We don't check parameter types here because we can emit a better
9488 error message later. */
9489 if (decl_context != PARM)
9491 type = check_var_type (unqualified_id, type);
9492 if (type == error_mark_node)
9493 return error_mark_node;
9496 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9497 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9499 if (decl_context == PARM || decl_context == CATCHPARM)
9501 if (ctype || in_namespace)
9502 error ("cannot use %<::%> in parameter declaration");
9504 /* A parameter declared as an array of T is really a pointer to T.
9505 One declared as a function is really a pointer to a function.
9506 One declared as a member is really a pointer to member. */
9508 if (TREE_CODE (type) == ARRAY_TYPE)
9510 /* Transfer const-ness of array into that of type pointed to. */
9511 type = build_pointer_type (TREE_TYPE (type));
9512 type_quals = TYPE_UNQUALIFIED;
9514 else if (TREE_CODE (type) == FUNCTION_TYPE)
9515 type = build_pointer_type (type);
9518 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9519 && !NEW_DELETE_OPNAME_P (unqualified_id))
9520 type = build_memfn_type (type, ctype, memfn_quals);
9525 if (decl_context == PARM)
9527 decl = cp_build_parm_decl (unqualified_id, type);
9529 bad_specifiers (decl, BSP_PARM, virtualp,
9530 memfn_quals != TYPE_UNQUALIFIED,
9531 inlinep, friendp, raises != NULL_TREE);
9533 else if (decl_context == FIELD)
9535 /* The C99 flexible array extension. */
9536 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9537 && TYPE_DOMAIN (type) == NULL_TREE)
9539 tree itype = compute_array_index_type (dname, integer_zero_node,
9540 tf_warning_or_error);
9541 type = build_cplus_array_type (TREE_TYPE (type), itype);
9544 if (type == error_mark_node)
9546 /* Happens when declaring arrays of sizes which
9547 are error_mark_node, for example. */
9550 else if (in_namespace && !friendp)
9552 /* Something like struct S { int N::j; }; */
9553 error ("invalid use of %<::%>");
9554 return error_mark_node;
9556 else if (TREE_CODE (type) == FUNCTION_TYPE
9557 || TREE_CODE (type) == METHOD_TYPE)
9560 tree function_context;
9564 /* This should never happen in pure C++ (the check
9565 could be an assert). It could happen in
9566 Objective-C++ if someone writes invalid code that
9567 uses a function declaration for an instance
9568 variable or property (instance variables and
9569 properties are parsed as FIELD_DECLs, but they are
9570 part of an Objective-C class, not a C++ class).
9571 That code is invalid and is caught by this
9575 error ("declaration of function %qD in invalid context",
9577 return error_mark_node;
9580 /* ``A union may [ ... ] not [ have ] virtual functions.''
9582 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9584 error ("function %qD declared virtual inside a union",
9586 return error_mark_node;
9589 if (NEW_DELETE_OPNAME_P (unqualified_id))
9593 error ("%qD cannot be declared virtual, since it "
9601 /* Check that the name used for a destructor makes sense. */
9602 if (sfk == sfk_destructor)
9604 tree uqname = id_declarator->u.id.unqualified_name;
9608 gcc_assert (friendp);
9609 error ("expected qualified name in friend declaration "
9610 "for destructor %qD", uqname);
9611 return error_mark_node;
9614 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9616 error ("declaration of %qD as member of %qT",
9618 return error_mark_node;
9622 error ("a destructor cannot be %<constexpr%>");
9623 return error_mark_node;
9626 else if (sfk == sfk_constructor && friendp && !ctype)
9628 error ("expected qualified name in friend declaration "
9629 "for constructor %qD",
9630 id_declarator->u.id.unqualified_name);
9631 return error_mark_node;
9634 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9635 function_context = (ctype != NULL_TREE) ?
9636 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9637 publicp = (! friendp || ! staticp)
9638 && function_context == NULL_TREE;
9639 decl = grokfndecl (ctype, type,
9640 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9641 ? unqualified_id : dname,
9644 virtualp, flags, memfn_quals, raises,
9645 friendp ? -1 : 0, friendp, publicp,
9646 inlinep | (2 * constexpr_p),
9648 funcdef_flag, template_count, in_namespace,
9649 attrlist, declarator->id_loc);
9650 if (decl == NULL_TREE)
9651 return error_mark_node;
9653 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9654 /* The decl and setting of decl_attr is also turned off. */
9655 decl = build_decl_attribute_variant (decl, decl_attr);
9658 /* [class.conv.ctor]
9660 A constructor declared without the function-specifier
9661 explicit that can be called with a single parameter
9662 specifies a conversion from the type of its first
9663 parameter to the type of its class. Such a constructor
9664 is called a converting constructor. */
9666 DECL_NONCONVERTING_P (decl) = 1;
9668 else if (!staticp && !dependent_type_p (type)
9669 && !COMPLETE_TYPE_P (complete_type (type))
9670 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9673 error ("field %qD has incomplete type", unqualified_id);
9675 error ("name %qT has incomplete type", type);
9677 /* If we're instantiating a template, tell them which
9678 instantiation made the field's type be incomplete. */
9679 if (current_class_type
9680 && TYPE_NAME (current_class_type)
9681 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9683 && declspecs->type == type)
9684 error (" in instantiation of template %qT",
9685 current_class_type);
9687 return error_mark_node;
9693 error ("%qE is neither function nor member function; "
9694 "cannot be declared friend", unqualified_id);
9702 /* Friends are treated specially. */
9703 if (ctype == current_class_type)
9704 ; /* We already issued a permerror. */
9705 else if (decl && DECL_NAME (decl))
9707 if (template_class_depth (current_class_type) == 0)
9709 decl = check_explicit_specialization
9710 (unqualified_id, decl, template_count,
9711 2 * funcdef_flag + 4);
9712 if (decl == error_mark_node)
9713 return error_mark_node;
9716 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9717 decl = do_friend (ctype, unqualified_id, decl,
9723 return error_mark_node;
9726 /* Structure field. It may not be a function, except for C++. */
9728 if (decl == NULL_TREE)
9734 /* An attempt is being made to initialize a non-static
9735 member. But, from [class.mem]:
9737 4 A member-declarator can contain a
9738 constant-initializer only if it declares a static
9739 member (_class.static_) of integral or enumeration
9740 type, see _class.static.data_.
9742 This used to be relatively common practice, but
9743 the rest of the compiler does not correctly
9744 handle the initialization unless the member is
9745 static so we make it static below. */
9746 if (cxx_dialect >= cxx0x)
9748 sorry ("non-static data member initializers");
9752 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9754 permerror (input_location, "making %qD static", unqualified_id);
9759 if (uses_template_parms (type))
9760 /* We'll check at instantiation time. */
9762 else if (constexpr_p)
9763 /* constexpr has the same requirements. */
9765 else if (check_static_variable_definition (unqualified_id,
9767 /* If we just return the declaration, crashes
9768 will sometimes occur. We therefore return
9769 void_type_node, as if this was a friend
9770 declaration, to cause callers to completely
9771 ignore this declaration. */
9772 return error_mark_node;
9777 /* C++ allows static class members. All other work
9778 for this is done by grokfield. */
9779 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9780 set_linkage_for_static_data_member (decl);
9781 /* Even if there is an in-class initialization, DECL
9782 is considered undefined until an out-of-class
9783 definition is provided. */
9784 DECL_EXTERNAL (decl) = 1;
9787 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9789 if (constexpr_p && !initialized)
9791 error ("constexpr static data member %qD must have an "
9792 "initializer", decl);
9793 constexpr_p = false;
9800 error ("non-static data member %qE declared %<constexpr%>",
9802 constexpr_p = false;
9804 decl = build_decl (input_location,
9805 FIELD_DECL, unqualified_id, type);
9806 DECL_NONADDRESSABLE_P (decl) = bitfield;
9807 if (bitfield && !unqualified_id)
9808 TREE_NO_WARNING (decl) = 1;
9810 if (storage_class == sc_mutable)
9812 DECL_MUTABLE_P (decl) = 1;
9813 storage_class = sc_none;
9817 bad_specifiers (decl, BSP_FIELD, virtualp,
9818 memfn_quals != TYPE_UNQUALIFIED,
9819 inlinep, friendp, raises != NULL_TREE);
9822 else if (TREE_CODE (type) == FUNCTION_TYPE
9823 || TREE_CODE (type) == METHOD_TYPE)
9828 if (!unqualified_id)
9829 return error_mark_node;
9831 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9832 original_name = dname;
9834 original_name = unqualified_id;
9836 if (storage_class == sc_auto)
9837 error ("storage class %<auto%> invalid for function %qs", name);
9838 else if (storage_class == sc_register)
9839 error ("storage class %<register%> invalid for function %qs", name);
9841 error ("storage class %<__thread%> invalid for function %qs", name);
9843 /* Function declaration not at top level.
9844 Storage classes other than `extern' are not allowed
9845 and `extern' makes no difference. */
9846 if (! toplevel_bindings_p ()
9847 && (storage_class == sc_static
9848 || declspecs->specs[(int)ds_inline])
9851 if (storage_class == sc_static)
9852 pedwarn (input_location, OPT_pedantic,
9853 "%<static%> specified invalid for function %qs "
9854 "declared out of global scope", name);
9856 pedwarn (input_location, OPT_pedantic,
9857 "%<inline%> specifier invalid for function %qs "
9858 "declared out of global scope", name);
9861 if (ctype != NULL_TREE
9862 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9864 error ("%q#T is not a class or a namespace", ctype);
9868 if (ctype == NULL_TREE)
9872 error ("virtual non-class function %qs", name);
9875 else if (sfk == sfk_constructor
9876 || sfk == sfk_destructor)
9879 ? "%qs defined in a non-class scope"
9880 : "%qs declared in a non-class scope", name);
9885 /* Record presence of `static'. */
9886 publicp = (ctype != NULL_TREE
9887 || storage_class == sc_extern
9888 || storage_class != sc_static);
9890 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9891 virtualp, flags, memfn_quals, raises,
9893 publicp, inlinep | (2 * constexpr_p), sfk,
9895 template_count, in_namespace, attrlist,
9896 declarator->id_loc);
9897 if (decl == NULL_TREE)
9898 return error_mark_node;
9902 int invalid_static = 0;
9904 /* Don't allow a static member function in a class, and forbid
9905 declaring main to be static. */
9906 if (TREE_CODE (type) == METHOD_TYPE)
9908 permerror (input_location, "cannot declare member function %qD to have "
9909 "static linkage", decl);
9912 else if (current_function_decl)
9914 /* FIXME need arm citation */
9915 error ("cannot declare static function inside another function");
9922 storage_class = sc_none;
9928 /* It's a variable. */
9930 /* An uninitialized decl with `extern' is a reference. */
9931 decl = grokvardecl (type, unqualified_id,
9934 (type_quals & TYPE_QUAL_CONST) != 0,
9935 ctype ? ctype : in_namespace);
9936 bad_specifiers (decl, BSP_VAR, virtualp,
9937 memfn_quals != TYPE_UNQUALIFIED,
9938 inlinep, friendp, raises != NULL_TREE);
9942 DECL_CONTEXT (decl) = ctype;
9945 permerror (input_location, "%<static%> may not be used when defining "
9946 "(as opposed to declaring) a static data member");
9948 storage_class = sc_none;
9950 if (storage_class == sc_register && TREE_STATIC (decl))
9952 error ("static member %qD declared %<register%>", decl);
9953 storage_class = sc_none;
9955 if (storage_class == sc_extern && pedantic)
9957 pedwarn (input_location, OPT_pedantic,
9958 "cannot explicitly declare member %q#D to have "
9959 "extern linkage", decl);
9960 storage_class = sc_none;
9963 else if (constexpr_p && DECL_EXTERNAL (decl))
9964 error ("declaration of constexpr variable %qD is not a definition",
9968 if (storage_class == sc_extern && initialized && !funcdef_flag)
9970 if (toplevel_bindings_p ())
9972 /* It's common practice (and completely valid) to have a const
9973 be initialized and declared extern. */
9974 if (!(type_quals & TYPE_QUAL_CONST))
9975 warning (0, "%qs initialized and declared %<extern%>", name);
9979 error ("%qs has both %<extern%> and initializer", name);
9980 return error_mark_node;
9984 /* Record `register' declaration for warnings on &
9985 and in case doing stupid register allocation. */
9987 if (storage_class == sc_register)
9988 DECL_REGISTER (decl) = 1;
9989 else if (storage_class == sc_extern)
9990 DECL_THIS_EXTERN (decl) = 1;
9991 else if (storage_class == sc_static)
9992 DECL_THIS_STATIC (decl) = 1;
9994 /* Don't forget constexprness. */
9996 DECL_DECLARED_CONSTEXPR_P (decl) = true;
9998 /* Record constancy and volatility on the DECL itself . There's
9999 no need to do this when processing a template; we'll do this
10000 for the instantiated declaration based on the type of DECL. */
10001 if (!processing_template_decl)
10002 cp_apply_type_quals_to_decl (type_quals, decl);
10008 /* Subroutine of start_function. Ensure that each of the parameter
10009 types (as listed in PARMS) is complete, as is required for a
10010 function definition. */
10013 require_complete_types_for_parms (tree parms)
10015 for (; parms; parms = DECL_CHAIN (parms))
10017 if (dependent_type_p (TREE_TYPE (parms)))
10019 if (!VOID_TYPE_P (TREE_TYPE (parms))
10020 && complete_type_or_else (TREE_TYPE (parms), parms))
10022 relayout_decl (parms);
10023 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10026 /* grokparms or complete_type_or_else will have already issued
10028 TREE_TYPE (parms) = error_mark_node;
10032 /* Returns nonzero if T is a local variable. */
10035 local_variable_p (const_tree t)
10037 if ((TREE_CODE (t) == VAR_DECL
10038 /* A VAR_DECL with a context that is a _TYPE is a static data
10040 && !TYPE_P (CP_DECL_CONTEXT (t))
10041 /* Any other non-local variable must be at namespace scope. */
10042 && !DECL_NAMESPACE_SCOPE_P (t))
10043 || (TREE_CODE (t) == PARM_DECL))
10049 /* Like local_variable_p, but suitable for use as a tree-walking
10053 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10054 void *data ATTRIBUTE_UNUSED)
10056 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10058 else if (TYPE_P (*tp))
10059 *walk_subtrees = 0;
10065 /* Check that ARG, which is a default-argument expression for a
10066 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10067 something goes wrong. DECL may also be a _TYPE node, rather than a
10068 DECL, if there is no DECL available. */
10071 check_default_argument (tree decl, tree arg)
10076 if (TREE_CODE (arg) == DEFAULT_ARG)
10077 /* We get a DEFAULT_ARG when looking at an in-class declaration
10078 with a default argument. Ignore the argument for now; we'll
10079 deal with it after the class is complete. */
10088 decl_type = TREE_TYPE (decl);
10090 if (arg == error_mark_node
10091 || decl == error_mark_node
10092 || TREE_TYPE (arg) == error_mark_node
10093 || decl_type == error_mark_node)
10094 /* Something already went wrong. There's no need to check
10096 return error_mark_node;
10098 /* [dcl.fct.default]
10100 A default argument expression is implicitly converted to the
10102 if (!TREE_TYPE (arg)
10103 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10106 error ("default argument for %q#D has type %qT",
10107 decl, TREE_TYPE (arg));
10109 error ("default argument for parameter of type %qT has type %qT",
10110 decl_type, TREE_TYPE (arg));
10112 return error_mark_node;
10115 /* [dcl.fct.default]
10117 Local variables shall not be used in default argument
10120 The keyword `this' shall not be used in a default argument of a
10121 member function. */
10122 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10125 error ("default argument %qE uses local variable %qD", arg, var);
10126 return error_mark_node;
10133 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10136 type_is_deprecated (tree type)
10138 enum tree_code code;
10139 if (TREE_DEPRECATED (type))
10141 if (TYPE_NAME (type)
10142 && TREE_DEPRECATED (TYPE_NAME (type)))
10145 /* Do warn about using typedefs to a deprecated class. */
10146 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10147 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10149 code = TREE_CODE (type);
10151 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10152 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10153 || code == METHOD_TYPE || code == ARRAY_TYPE)
10154 return type_is_deprecated (TREE_TYPE (type));
10156 if (TYPE_PTRMEMFUNC_P (type))
10157 return type_is_deprecated
10158 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10163 /* Decode the list of parameter types for a function type.
10164 Given the list of things declared inside the parens,
10165 return a list of types.
10167 If this parameter does not end with an ellipsis, we append
10170 *PARMS is set to the chain of PARM_DECLs created. */
10173 grokparms (tree parmlist, tree *parms)
10175 tree result = NULL_TREE;
10176 tree decls = NULL_TREE;
10180 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10182 tree type = NULL_TREE;
10183 tree init = TREE_PURPOSE (parm);
10184 tree decl = TREE_VALUE (parm);
10185 const char *errmsg;
10187 if (parm == void_list_node)
10190 if (! decl || TREE_TYPE (decl) == error_mark_node)
10193 type = TREE_TYPE (decl);
10194 if (VOID_TYPE_P (type))
10196 if (same_type_p (type, void_type_node)
10197 && DECL_SELF_REFERENCE_P (type)
10198 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10199 /* this is a parmlist of `(void)', which is ok. */
10201 cxx_incomplete_type_error (decl, type);
10202 /* It's not a good idea to actually create parameters of
10203 type `void'; other parts of the compiler assume that a
10204 void type terminates the parameter list. */
10205 type = error_mark_node;
10206 TREE_TYPE (decl) = error_mark_node;
10209 if (type != error_mark_node
10210 && TYPE_FOR_JAVA (type)
10211 && MAYBE_CLASS_TYPE_P (type))
10213 error ("parameter %qD has Java class type", decl);
10214 type = error_mark_node;
10215 TREE_TYPE (decl) = error_mark_node;
10219 if (type != error_mark_node
10220 && (errmsg = targetm.invalid_parameter_type (type)))
10223 type = error_mark_node;
10224 TREE_TYPE (decl) = error_mark_node;
10227 if (type != error_mark_node)
10229 if (deprecated_state != DEPRECATED_SUPPRESS)
10231 tree deptype = type_is_deprecated (type);
10233 warn_deprecated_use (deptype, NULL_TREE);
10236 /* Top-level qualifiers on the parameters are
10237 ignored for function types. */
10238 type = cp_build_qualified_type (type, 0);
10239 if (TREE_CODE (type) == METHOD_TYPE)
10241 error ("parameter %qD invalidly declared method type", decl);
10242 type = build_pointer_type (type);
10243 TREE_TYPE (decl) = type;
10245 else if (abstract_virtuals_error (decl, type))
10246 any_error = 1; /* Seems like a good idea. */
10247 else if (POINTER_TYPE_P (type))
10249 /* [dcl.fct]/6, parameter types cannot contain pointers
10250 (references) to arrays of unknown bound. */
10251 tree t = TREE_TYPE (type);
10252 int ptr = TYPE_PTR_P (type);
10256 if (TYPE_PTR_P (t))
10258 else if (TREE_CODE (t) != ARRAY_TYPE)
10260 else if (!TYPE_DOMAIN (t))
10264 if (TREE_CODE (t) == ARRAY_TYPE)
10266 ? G_("parameter %qD includes pointer to array of "
10267 "unknown bound %qT")
10268 : G_("parameter %qD includes reference to array of "
10269 "unknown bound %qT"),
10275 else if (init && !processing_template_decl)
10276 init = check_default_argument (decl, init);
10279 if (TREE_CODE (decl) == PARM_DECL
10280 && FUNCTION_PARAMETER_PACK_P (decl)
10281 && TREE_CHAIN (parm)
10282 && TREE_CHAIN (parm) != void_list_node)
10283 error ("parameter packs must be at the end of the parameter list");
10285 DECL_CHAIN (decl) = decls;
10287 result = tree_cons (init, type, result);
10289 decls = nreverse (decls);
10290 result = nreverse (result);
10292 result = chainon (result, void_list_node);
10299 /* D is a constructor or overloaded `operator='.
10301 Let T be the class in which D is declared. Then, this function
10304 -1 if D's is an ill-formed constructor or copy assignment operator
10305 whose first parameter is of type `T'.
10306 0 if D is not a copy constructor or copy assignment
10308 1 if D is a copy constructor or copy assignment operator whose
10309 first parameter is a reference to non-const qualified T.
10310 2 if D is a copy constructor or copy assignment operator whose
10311 first parameter is a reference to const qualified T.
10313 This function can be used as a predicate. Positive values indicate
10314 a copy constructor and nonzero values indicate a copy assignment
10318 copy_fn_p (const_tree d)
10324 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10326 if (TREE_CODE (d) == TEMPLATE_DECL
10327 || (DECL_TEMPLATE_INFO (d)
10328 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10329 /* Instantiations of template member functions are never copy
10330 functions. Note that member functions of templated classes are
10331 represented as template functions internally, and we must
10332 accept those as copy functions. */
10335 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10339 arg_type = TREE_VALUE (args);
10340 if (arg_type == error_mark_node)
10343 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10345 /* Pass by value copy assignment operator. */
10348 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10349 && !TYPE_REF_IS_RVALUE (arg_type)
10350 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10352 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10358 args = TREE_CHAIN (args);
10360 if (args && args != void_list_node && !TREE_PURPOSE (args))
10361 /* There are more non-optional args. */
10367 /* D is a constructor or overloaded `operator='.
10369 Let T be the class in which D is declared. Then, this function
10370 returns true when D is a move constructor or move assignment
10371 operator, false otherwise. */
10374 move_fn_p (const_tree d)
10378 bool result = false;
10380 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10382 if (cxx_dialect == cxx98)
10383 /* There are no move constructors if we are in C++98 mode. */
10386 if (TREE_CODE (d) == TEMPLATE_DECL
10387 || (DECL_TEMPLATE_INFO (d)
10388 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10389 /* Instantiations of template member functions are never copy
10390 functions. Note that member functions of templated classes are
10391 represented as template functions internally, and we must
10392 accept those as copy functions. */
10395 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10399 arg_type = TREE_VALUE (args);
10400 if (arg_type == error_mark_node)
10403 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10404 && TYPE_REF_IS_RVALUE (arg_type)
10405 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10409 args = TREE_CHAIN (args);
10411 if (args && args != void_list_node && !TREE_PURPOSE (args))
10412 /* There are more non-optional args. */
10418 /* Remember any special properties of member function DECL. */
10421 grok_special_member_properties (tree decl)
10425 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10428 class_type = DECL_CONTEXT (decl);
10429 if (DECL_CONSTRUCTOR_P (decl))
10431 int ctor = copy_fn_p (decl);
10433 if (!DECL_ARTIFICIAL (decl))
10434 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10440 A non-template constructor for class X is a copy
10441 constructor if its first parameter is of type X&, const
10442 X&, volatile X& or const volatile X&, and either there
10443 are no other parameters or else all other parameters have
10444 default arguments. */
10445 TYPE_HAS_COPY_CTOR (class_type) = 1;
10446 if (user_provided_p (decl))
10447 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10449 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10451 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10453 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10454 if (user_provided_p (decl))
10455 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10457 else if (move_fn_p (decl) && user_provided_p (decl))
10458 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10459 else if (is_list_ctor (decl))
10460 TYPE_HAS_LIST_CTOR (class_type) = 1;
10462 if (DECL_DECLARED_CONSTEXPR_P (decl)
10463 && !copy_fn_p (decl) && !move_fn_p (decl))
10464 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10466 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10470 A non-template assignment operator for class X is a copy
10471 assignment operator if its parameter is of type X, X&, const
10472 X&, volatile X& or const volatile X&. */
10474 int assop = copy_fn_p (decl);
10478 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10479 if (user_provided_p (decl))
10480 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10482 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10484 else if (move_fn_p (decl) && user_provided_p (decl))
10485 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10487 /* Destructors are handled in check_methods. */
10490 /* Check a constructor DECL has the correct form. Complains
10491 if the class has a constructor of the form X(X). */
10494 grok_ctor_properties (const_tree ctype, const_tree decl)
10496 int ctor_parm = copy_fn_p (decl);
10502 A declaration of a constructor for a class X is ill-formed if
10503 its first parameter is of type (optionally cv-qualified) X
10504 and either there are no other parameters or else all other
10505 parameters have default arguments.
10507 We *don't* complain about member template instantiations that
10508 have this form, though; they can occur as we try to decide
10509 what constructor to use during overload resolution. Since
10510 overload resolution will never prefer such a constructor to
10511 the non-template copy constructor (which is either explicitly
10512 or implicitly defined), there's no need to worry about their
10513 existence. Theoretically, they should never even be
10514 instantiated, but that's hard to forestall. */
10515 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10523 /* An operator with this code is unary, but can also be binary. */
10526 ambi_op_p (enum tree_code code)
10528 return (code == INDIRECT_REF
10529 || code == ADDR_EXPR
10530 || code == UNARY_PLUS_EXPR
10531 || code == NEGATE_EXPR
10532 || code == PREINCREMENT_EXPR
10533 || code == PREDECREMENT_EXPR);
10536 /* An operator with this name can only be unary. */
10539 unary_op_p (enum tree_code code)
10541 return (code == TRUTH_NOT_EXPR
10542 || code == BIT_NOT_EXPR
10543 || code == COMPONENT_REF
10544 || code == TYPE_EXPR);
10547 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10548 errors are issued for invalid declarations. */
10551 grok_op_properties (tree decl, bool complain)
10553 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10555 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10556 tree name = DECL_NAME (decl);
10557 enum tree_code operator_code;
10562 /* Count the number of arguments and check for ellipsis. */
10563 for (argtype = argtypes, arity = 0;
10564 argtype && argtype != void_list_node;
10565 argtype = TREE_CHAIN (argtype))
10567 ellipsis_p = !argtype;
10569 class_type = DECL_CONTEXT (decl);
10570 if (class_type && !CLASS_TYPE_P (class_type))
10571 class_type = NULL_TREE;
10573 if (DECL_CONV_FN_P (decl))
10574 operator_code = TYPE_EXPR;
10578 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10579 if (ansi_opname (CODE) == name) \
10581 operator_code = (CODE); \
10584 else if (ansi_assopname (CODE) == name) \
10586 operator_code = (CODE); \
10587 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10591 #include "operators.def"
10592 #undef DEF_OPERATOR
10594 gcc_unreachable ();
10597 gcc_assert (operator_code != MAX_TREE_CODES);
10598 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10601 switch (operator_code)
10604 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10608 TYPE_GETS_DELETE (class_type) |= 1;
10612 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10615 case VEC_DELETE_EXPR:
10616 TYPE_GETS_DELETE (class_type) |= 2;
10623 /* [basic.std.dynamic.allocation]/1:
10625 A program is ill-formed if an allocation function is declared
10626 in a namespace scope other than global scope or declared static
10629 The same also holds true for deallocation functions. */
10630 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10631 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10633 if (DECL_NAMESPACE_SCOPE_P (decl))
10635 if (CP_DECL_CONTEXT (decl) != global_namespace)
10637 error ("%qD may not be declared within a namespace", decl);
10640 else if (!TREE_PUBLIC (decl))
10642 error ("%qD may not be declared as static", decl);
10648 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10650 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10651 DECL_IS_OPERATOR_NEW (decl) = 1;
10653 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10654 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10657 /* An operator function must either be a non-static member function
10658 or have at least one parameter of a class, a reference to a class,
10659 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10660 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10662 if (operator_code == TYPE_EXPR
10663 || operator_code == CALL_EXPR
10664 || operator_code == COMPONENT_REF
10665 || operator_code == ARRAY_REF
10666 || operator_code == NOP_EXPR)
10668 error ("%qD must be a nonstatic member function", decl);
10675 if (DECL_STATIC_FUNCTION_P (decl))
10677 error ("%qD must be either a non-static member "
10678 "function or a non-member function", decl);
10682 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10684 tree arg = non_reference (TREE_VALUE (p));
10685 if (arg == error_mark_node)
10688 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10689 because these checks are performed even on
10690 template functions. */
10691 if (MAYBE_CLASS_TYPE_P (arg)
10692 || TREE_CODE (arg) == ENUMERAL_TYPE)
10696 if (!p || p == void_list_node)
10699 error ("%qD must have an argument of class or "
10700 "enumerated type", decl);
10706 /* There are no restrictions on the arguments to an overloaded
10708 if (operator_code == CALL_EXPR)
10711 /* Warn about conversion operators that will never be used. */
10712 if (IDENTIFIER_TYPENAME_P (name)
10713 && ! DECL_TEMPLATE_INFO (decl)
10715 /* Warn only declaring the function; there is no need to
10716 warn again about out-of-class definitions. */
10717 && class_type == current_class_type)
10719 tree t = TREE_TYPE (name);
10720 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10723 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10725 if (TREE_CODE (t) == VOID_TYPE)
10726 warning (OPT_Wconversion,
10728 ? G_("conversion to a reference to void "
10729 "will never use a type conversion operator")
10730 : G_("conversion to void "
10731 "will never use a type conversion operator"));
10732 else if (class_type)
10734 if (t == class_type)
10735 warning (OPT_Wconversion,
10737 ? G_("conversion to a reference to the same type "
10738 "will never use a type conversion operator")
10739 : G_("conversion to the same type "
10740 "will never use a type conversion operator"));
10741 /* Don't force t to be complete here. */
10742 else if (MAYBE_CLASS_TYPE_P (t)
10743 && COMPLETE_TYPE_P (t)
10744 && DERIVED_FROM_P (t, class_type))
10745 warning (OPT_Wconversion,
10747 ? G_("conversion to a reference to a base class "
10748 "will never use a type conversion operator")
10749 : G_("conversion to a base class "
10750 "will never use a type conversion operator"));
10755 if (operator_code == COND_EXPR)
10758 error ("ISO C++ prohibits overloading operator ?:");
10761 else if (ellipsis_p)
10763 error ("%qD must not have variable number of arguments", decl);
10766 else if (ambi_op_p (operator_code))
10769 /* We pick the one-argument operator codes by default, so
10770 we don't have to change anything. */
10772 else if (arity == 2)
10774 /* If we thought this was a unary operator, we now know
10775 it to be a binary operator. */
10776 switch (operator_code)
10779 operator_code = MULT_EXPR;
10783 operator_code = BIT_AND_EXPR;
10786 case UNARY_PLUS_EXPR:
10787 operator_code = PLUS_EXPR;
10791 operator_code = MINUS_EXPR;
10794 case PREINCREMENT_EXPR:
10795 operator_code = POSTINCREMENT_EXPR;
10798 case PREDECREMENT_EXPR:
10799 operator_code = POSTDECREMENT_EXPR;
10803 gcc_unreachable ();
10806 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10808 if ((operator_code == POSTINCREMENT_EXPR
10809 || operator_code == POSTDECREMENT_EXPR)
10810 && ! processing_template_decl
10811 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10814 error ("postfix %qD must take %<int%> as its argument",
10817 error ("postfix %qD must take %<int%> as its second "
10825 error ("%qD must take either zero or one argument", decl);
10827 error ("%qD must take either one or two arguments", decl);
10831 /* More Effective C++ rule 6. */
10833 && (operator_code == POSTINCREMENT_EXPR
10834 || operator_code == POSTDECREMENT_EXPR
10835 || operator_code == PREINCREMENT_EXPR
10836 || operator_code == PREDECREMENT_EXPR))
10838 tree arg = TREE_VALUE (argtypes);
10839 tree ret = TREE_TYPE (TREE_TYPE (decl));
10840 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10841 arg = TREE_TYPE (arg);
10842 arg = TYPE_MAIN_VARIANT (arg);
10843 if (operator_code == PREINCREMENT_EXPR
10844 || operator_code == PREDECREMENT_EXPR)
10846 if (TREE_CODE (ret) != REFERENCE_TYPE
10847 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10849 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10850 build_reference_type (arg));
10854 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10855 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10859 else if (unary_op_p (operator_code))
10864 error ("%qD must take %<void%>", decl);
10866 error ("%qD must take exactly one argument", decl);
10870 else /* if (binary_op_p (operator_code)) */
10875 error ("%qD must take exactly one argument", decl);
10877 error ("%qD must take exactly two arguments", decl);
10881 /* More Effective C++ rule 7. */
10883 && (operator_code == TRUTH_ANDIF_EXPR
10884 || operator_code == TRUTH_ORIF_EXPR
10885 || operator_code == COMPOUND_EXPR))
10886 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10890 /* Effective C++ rule 23. */
10893 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10894 && (operator_code == PLUS_EXPR
10895 || operator_code == MINUS_EXPR
10896 || operator_code == TRUNC_DIV_EXPR
10897 || operator_code == MULT_EXPR
10898 || operator_code == TRUNC_MOD_EXPR)
10899 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10900 warning (OPT_Weffc__, "%qD should return by value", decl);
10902 /* [over.oper]/8 */
10903 for (; argtypes && argtypes != void_list_node;
10904 argtypes = TREE_CHAIN (argtypes))
10905 if (TREE_PURPOSE (argtypes))
10907 TREE_PURPOSE (argtypes) = NULL_TREE;
10908 if (operator_code == POSTINCREMENT_EXPR
10909 || operator_code == POSTDECREMENT_EXPR)
10911 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10916 error ("%qD cannot have default arguments", decl);
10924 /* Return a string giving the keyword associate with CODE. */
10926 static const char *
10927 tag_name (enum tag_types code)
10939 case typename_type:
10942 gcc_unreachable ();
10946 /* Name lookup in an elaborated-type-specifier (after the keyword
10947 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10948 elaborated-type-specifier is invalid, issue a diagnostic and return
10949 error_mark_node; otherwise, return the *_TYPE to which it referred.
10950 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10953 check_elaborated_type_specifier (enum tag_types tag_code,
10955 bool allow_template_p)
10961 struct S { struct S *p; };
10963 name lookup will find the TYPE_DECL for the implicit "S::S"
10964 typedef. Adjust for that here. */
10965 if (DECL_SELF_REFERENCE_P (decl))
10966 decl = TYPE_NAME (TREE_TYPE (decl));
10968 type = TREE_TYPE (decl);
10970 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10971 is false for this case as well. */
10972 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10974 error ("using template type parameter %qT after %qs",
10975 type, tag_name (tag_code));
10976 return error_mark_node;
10980 If the identifier resolves to a typedef-name or a template
10981 type-parameter, the elaborated-type-specifier is ill-formed.
10983 In other words, the only legitimate declaration to use in the
10984 elaborated type specifier is the implicit typedef created when
10985 the type is declared. */
10986 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10987 && !DECL_SELF_REFERENCE_P (decl)
10988 && tag_code != typename_type)
10990 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10991 error ("%q+D has a previous declaration here", decl);
10992 return error_mark_node;
10994 else if (TREE_CODE (type) != RECORD_TYPE
10995 && TREE_CODE (type) != UNION_TYPE
10996 && tag_code != enum_type
10997 && tag_code != typename_type)
10999 error ("%qT referred to as %qs", type, tag_name (tag_code));
11000 error ("%q+T has a previous declaration here", type);
11001 return error_mark_node;
11003 else if (TREE_CODE (type) != ENUMERAL_TYPE
11004 && tag_code == enum_type)
11006 error ("%qT referred to as enum", type);
11007 error ("%q+T has a previous declaration here", type);
11008 return error_mark_node;
11010 else if (!allow_template_p
11011 && TREE_CODE (type) == RECORD_TYPE
11012 && CLASSTYPE_IS_TEMPLATE (type))
11014 /* If a class template appears as elaborated type specifier
11015 without a template header such as:
11017 template <class T> class C {};
11018 void f(class C); // No template header here
11020 then the required template argument is missing. */
11021 error ("template argument required for %<%s %T%>",
11022 tag_name (tag_code),
11023 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11024 return error_mark_node;
11030 /* Lookup NAME in elaborate type specifier in scope according to
11031 SCOPE and issue diagnostics if necessary.
11032 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11033 found, and ERROR_MARK_NODE for type error. */
11036 lookup_and_check_tag (enum tag_types tag_code, tree name,
11037 tag_scope scope, bool template_header_p)
11041 if (scope == ts_global)
11043 /* First try ordinary name lookup, ignoring hidden class name
11044 injected via friend declaration. */
11045 decl = lookup_name_prefer_type (name, 2);
11046 /* If that fails, the name will be placed in the smallest
11047 non-class, non-function-prototype scope according to 3.3.1/5.
11048 We may already have a hidden name declared as friend in this
11049 scope. So lookup again but not ignoring hidden names.
11050 If we find one, that name will be made visible rather than
11051 creating a new tag. */
11053 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11056 decl = lookup_type_scope (name, scope);
11058 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11059 decl = DECL_TEMPLATE_RESULT (decl);
11061 if (decl && TREE_CODE (decl) == TYPE_DECL)
11063 /* Look for invalid nested type:
11067 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11069 error ("%qD has the same name as the class in which it is "
11072 return error_mark_node;
11075 /* Two cases we need to consider when deciding if a class
11076 template is allowed as an elaborated type specifier:
11077 1. It is a self reference to its own class.
11078 2. It comes with a template header.
11082 template <class T> class C {
11083 class C *c1; // DECL_SELF_REFERENCE_P is true
11086 template <class U> class C; // template_header_p is true
11087 template <class T> class C<T>::D {
11088 class C *c2; // DECL_SELF_REFERENCE_P is true
11091 t = check_elaborated_type_specifier (tag_code,
11094 | DECL_SELF_REFERENCE_P (decl));
11097 else if (decl && TREE_CODE (decl) == TREE_LIST)
11099 error ("reference to %qD is ambiguous", name);
11100 print_candidates (decl);
11101 return error_mark_node;
11107 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11108 Define the tag as a forward-reference if it is not defined.
11110 If a declaration is given, process it here, and report an error if
11111 multiple declarations are not identical.
11113 SCOPE is TS_CURRENT when this is also a definition. Only look in
11114 the current frame for the name (since C++ allows new names in any
11115 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11116 declaration. Only look beginning from the current scope outward up
11117 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11119 TEMPLATE_HEADER_P is true when this declaration is preceded by
11120 a set of template parameters. */
11123 xref_tag (enum tag_types tag_code, tree name,
11124 tag_scope scope, bool template_header_p)
11126 enum tree_code code;
11128 tree context = NULL_TREE;
11130 timevar_push (TV_NAME_LOOKUP);
11132 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11138 code = RECORD_TYPE;
11144 code = ENUMERAL_TYPE;
11147 gcc_unreachable ();
11150 /* In case of anonymous name, xref_tag is only called to
11151 make type node and push name. Name lookup is not required. */
11152 if (ANON_AGGRNAME_P (name))
11155 t = lookup_and_check_tag (tag_code, name,
11156 scope, template_header_p);
11158 if (t == error_mark_node)
11159 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11161 if (scope != ts_current && t && current_class_type
11162 && template_class_depth (current_class_type)
11163 && template_header_p)
11165 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11166 definition of this tag. Since, in addition, we are currently
11167 processing a (member) template declaration of a template
11168 class, we must be very careful; consider:
11175 { template <class V>
11176 friend struct S1; };
11178 Here, the S2::S1 declaration should not be confused with the
11179 outer declaration. In particular, the inner version should
11180 have a template parameter of level 2, not level 1. This
11181 would be particularly important if the member declaration
11184 template <class V = U> friend struct S1;
11186 say, when we should tsubst into `U' when instantiating
11187 S2. On the other hand, when presented with:
11197 we must find the inner binding eventually. We
11198 accomplish this by making sure that the new type we
11199 create to represent this declaration has the right
11201 context = TYPE_CONTEXT (t);
11207 /* If no such tag is yet defined, create a forward-reference node
11208 and record it as the "definition".
11209 When a real declaration of this type is found,
11210 the forward-reference will be altered into a real type. */
11211 if (code == ENUMERAL_TYPE)
11213 error ("use of enum %q#D without previous declaration", name);
11214 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11218 t = make_class_type (code);
11219 TYPE_CONTEXT (t) = context;
11220 t = pushtag (name, t, scope);
11225 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11227 if (!redeclare_class_template (t, current_template_parms))
11228 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11230 else if (!processing_template_decl
11231 && CLASS_TYPE_P (t)
11232 && CLASSTYPE_IS_TEMPLATE (t))
11234 error ("redeclaration of %qT as a non-template", t);
11235 error ("previous declaration %q+D", t);
11236 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
11239 /* Make injected friend class visible. */
11240 if (scope != ts_within_enclosing_non_class
11241 && hidden_name_p (TYPE_NAME (t)))
11243 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11244 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11246 if (TYPE_TEMPLATE_INFO (t))
11248 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11249 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11254 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
11258 xref_tag_from_type (tree old, tree id, tag_scope scope)
11260 enum tag_types tag_kind;
11262 if (TREE_CODE (old) == RECORD_TYPE)
11263 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11265 tag_kind = union_type;
11267 if (id == NULL_TREE)
11268 id = TYPE_IDENTIFIER (old);
11270 return xref_tag (tag_kind, id, scope, false);
11273 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11274 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11275 access_* node, and the TREE_VALUE is the type of the base-class.
11276 Non-NULL TREE_TYPE indicates virtual inheritance.
11278 Returns true if the binfo hierarchy was successfully created,
11279 false if an error was detected. */
11282 xref_basetypes (tree ref, tree base_list)
11285 tree binfo, base_binfo;
11286 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11287 unsigned max_bases = 0; /* Maximum direct bases. */
11289 tree default_access;
11290 tree igo_prev; /* Track Inheritance Graph Order. */
11292 if (ref == error_mark_node)
11295 /* The base of a derived class is private by default, all others are
11297 default_access = (TREE_CODE (ref) == RECORD_TYPE
11298 && CLASSTYPE_DECLARED_CLASS (ref)
11299 ? access_private_node : access_public_node);
11301 /* First, make sure that any templates in base-classes are
11302 instantiated. This ensures that if we call ourselves recursively
11303 we do not get confused about which classes are marked and which
11305 basep = &base_list;
11308 tree basetype = TREE_VALUE (*basep);
11310 if (!(processing_template_decl && uses_template_parms (basetype))
11311 && !complete_type_or_else (basetype, NULL))
11312 /* An incomplete type. Remove it from the list. */
11313 *basep = TREE_CHAIN (*basep);
11317 if (TREE_TYPE (*basep))
11319 if (CLASS_TYPE_P (basetype))
11320 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11321 basep = &TREE_CHAIN (*basep);
11325 TYPE_MARKED_P (ref) = 1;
11327 /* The binfo slot should be empty, unless this is an (ill-formed)
11329 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11331 error ("redefinition of %q#T", ref);
11335 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11337 binfo = make_tree_binfo (max_bases);
11339 TYPE_BINFO (ref) = binfo;
11340 BINFO_OFFSET (binfo) = size_zero_node;
11341 BINFO_TYPE (binfo) = ref;
11343 /* Apply base-class info set up to the variants of this type. */
11344 fixup_type_variants (ref);
11348 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11349 /* An aggregate cannot have baseclasses. */
11350 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11352 if (TREE_CODE (ref) == UNION_TYPE)
11354 error ("derived union %qT invalid", ref);
11361 if (TYPE_FOR_JAVA (ref))
11363 error ("Java class %qT cannot have multiple bases", ref);
11370 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11372 if (TYPE_FOR_JAVA (ref))
11374 error ("Java class %qT cannot have virtual bases", ref);
11379 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11381 tree access = TREE_PURPOSE (base_list);
11382 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11383 tree basetype = TREE_VALUE (base_list);
11385 if (access == access_default_node)
11386 access = default_access;
11388 if (PACK_EXPANSION_P (basetype))
11389 basetype = PACK_EXPANSION_PATTERN (basetype);
11390 if (TREE_CODE (basetype) == TYPE_DECL)
11391 basetype = TREE_TYPE (basetype);
11392 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11394 error ("base type %qT fails to be a struct or class type",
11399 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11400 TYPE_FOR_JAVA (ref) = 1;
11402 base_binfo = NULL_TREE;
11403 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11405 base_binfo = TYPE_BINFO (basetype);
11406 /* The original basetype could have been a typedef'd type. */
11407 basetype = BINFO_TYPE (base_binfo);
11409 /* Inherit flags from the base. */
11410 TYPE_HAS_NEW_OPERATOR (ref)
11411 |= TYPE_HAS_NEW_OPERATOR (basetype);
11412 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11413 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11414 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11415 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11416 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11417 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11418 CLASSTYPE_REPEATED_BASE_P (ref)
11419 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11422 /* We must do this test after we've seen through a typedef
11424 if (TYPE_MARKED_P (basetype))
11426 if (basetype == ref)
11427 error ("recursive type %qT undefined", basetype);
11429 error ("duplicate base type %qT invalid", basetype);
11433 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11434 /* Regenerate the pack expansion for the bases. */
11435 basetype = make_pack_expansion (basetype);
11437 TYPE_MARKED_P (basetype) = 1;
11439 base_binfo = copy_binfo (base_binfo, basetype, ref,
11440 &igo_prev, via_virtual);
11441 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11442 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11444 BINFO_BASE_APPEND (binfo, base_binfo);
11445 BINFO_BASE_ACCESS_APPEND (binfo, access);
11448 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11449 /* If we have space in the vbase vector, we must have shared at
11450 least one of them, and are therefore diamond shaped. */
11451 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11453 /* Unmark all the types. */
11454 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11455 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11456 TYPE_MARKED_P (ref) = 0;
11458 /* Now see if we have a repeated base type. */
11459 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11461 for (base_binfo = binfo; base_binfo;
11462 base_binfo = TREE_CHAIN (base_binfo))
11464 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11466 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11469 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11471 for (base_binfo = binfo; base_binfo;
11472 base_binfo = TREE_CHAIN (base_binfo))
11473 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11474 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11483 /* Copies the enum-related properties from type SRC to type DST.
11484 Used with the underlying type of an enum and the enum itself. */
11486 copy_type_enum (tree dst, tree src)
11488 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11489 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11490 TYPE_SIZE (dst) = TYPE_SIZE (src);
11491 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11492 SET_TYPE_MODE (dst, TYPE_MODE (src));
11493 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11494 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11495 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11496 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11499 /* Begin compiling the definition of an enumeration type.
11502 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11504 UNDERLYING_TYPE is the type that will be used as the storage for
11505 the enumeration type. This should be NULL_TREE if no storage type
11508 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11510 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11512 Returns the type object, as yet incomplete.
11513 Also records info about it so that build_enumerator
11514 may be used to declare the individual values as they are read. */
11517 start_enum (tree name, tree enumtype, tree underlying_type,
11518 bool scoped_enum_p, bool *is_new)
11520 tree prevtype = NULL_TREE;
11521 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11525 /* [C++0x dcl.enum]p5:
11527 If not explicitly specified, the underlying type of a scoped
11528 enumeration type is int. */
11529 if (!underlying_type && scoped_enum_p)
11530 underlying_type = integer_type_node;
11532 if (underlying_type)
11533 underlying_type = cv_unqualified (underlying_type);
11535 /* If this is the real definition for a previous forward reference,
11536 fill in the contents in the same object that used to be the
11537 forward reference. */
11539 enumtype = lookup_and_check_tag (enum_type, name,
11540 /*tag_scope=*/ts_current,
11541 /*template_header_p=*/false);
11543 /* In case of a template_decl, the only check that should be deferred
11544 to instantiation time is the comparison of underlying types. */
11545 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11547 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11549 error_at (input_location, "scoped/unscoped mismatch "
11550 "in enum %q#T", enumtype);
11551 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11552 "previous definition here");
11553 enumtype = error_mark_node;
11555 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11557 error_at (input_location, "underlying type mismatch "
11558 "in enum %q#T", enumtype);
11559 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11560 "previous definition here");
11561 enumtype = error_mark_node;
11563 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11564 && !dependent_type_p (underlying_type)
11565 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11566 && !same_type_p (underlying_type,
11567 ENUM_UNDERLYING_TYPE (enumtype)))
11569 error_at (input_location, "different underlying type "
11570 "in enum %q#T", enumtype);
11571 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11572 "previous definition here");
11573 underlying_type = NULL_TREE;
11577 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11578 || processing_template_decl)
11580 /* In case of error, make a dummy enum to allow parsing to
11582 if (enumtype == error_mark_node)
11584 name = make_anon_name ();
11585 enumtype = NULL_TREE;
11588 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11589 of an opaque enum, or an opaque enum of an already defined
11590 enumeration (C++0x only).
11591 In any other case, it'll be NULL_TREE. */
11597 prevtype = enumtype;
11598 enumtype = cxx_make_type (ENUMERAL_TYPE);
11599 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11600 if (enumtype == error_mark_node)
11601 return error_mark_node;
11603 /* The enum is considered opaque until the opening '{' of the
11604 enumerator list. */
11605 SET_OPAQUE_ENUM_P (enumtype, true);
11606 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11609 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11611 if (underlying_type)
11613 if (CP_INTEGRAL_TYPE_P (underlying_type))
11615 copy_type_enum (enumtype, underlying_type);
11616 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11618 else if (dependent_type_p (underlying_type))
11619 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11621 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11622 underlying_type, enumtype);
11625 /* If into a template class, the returned enum is always the first
11626 declaration (opaque or not) seen. This way all the references to
11627 this type will be to the same declaration. The following ones are used
11628 only to check for definition errors. */
11629 if (prevtype && processing_template_decl)
11635 /* After processing and defining all the values of an enumeration type,
11636 install their decls in the enumeration type.
11637 ENUMTYPE is the type object. */
11640 finish_enum_value_list (tree enumtype)
11643 tree underlying_type;
11646 tree minnode, maxnode;
11649 bool fixed_underlying_type_p
11650 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11652 /* We built up the VALUES in reverse order. */
11653 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11655 /* For an enum defined in a template, just set the type of the values;
11656 all further processing is postponed until the template is
11657 instantiated. We need to set the type so that tsubst of a CONST_DECL
11659 if (processing_template_decl)
11661 for (values = TYPE_VALUES (enumtype);
11663 values = TREE_CHAIN (values))
11664 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11668 /* Determine the minimum and maximum values of the enumerators. */
11669 if (TYPE_VALUES (enumtype))
11671 minnode = maxnode = NULL_TREE;
11673 for (values = TYPE_VALUES (enumtype);
11675 values = TREE_CHAIN (values))
11677 decl = TREE_VALUE (values);
11679 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11680 each enumerator has the type of its enumeration. Prior to the
11681 closing brace, the type of each enumerator is the type of its
11682 initializing value. */
11683 TREE_TYPE (decl) = enumtype;
11685 /* Update the minimum and maximum values, if appropriate. */
11686 value = DECL_INITIAL (decl);
11687 if (value == error_mark_node)
11688 value = integer_zero_node;
11689 /* Figure out what the minimum and maximum values of the
11690 enumerators are. */
11692 minnode = maxnode = value;
11693 else if (tree_int_cst_lt (maxnode, value))
11695 else if (tree_int_cst_lt (value, minnode))
11702 If the enumerator-list is empty, the underlying type is as if
11703 the enumeration had a single enumerator with value 0. */
11704 minnode = maxnode = integer_zero_node;
11706 if (!fixed_underlying_type_p)
11708 /* Compute the number of bits require to represent all values of the
11709 enumeration. We must do this before the type of MINNODE and
11710 MAXNODE are transformed, since tree_int_cst_min_precision relies
11711 on the TREE_TYPE of the value it is passed. */
11712 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11713 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11714 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11715 int precision = MAX (lowprec, highprec);
11717 bool use_short_enum;
11719 /* Determine the underlying type of the enumeration.
11723 The underlying type of an enumeration is an integral type that
11724 can represent all the enumerator values defined in the
11725 enumeration. It is implementation-defined which integral type is
11726 used as the underlying type for an enumeration except that the
11727 underlying type shall not be larger than int unless the value of
11728 an enumerator cannot fit in an int or unsigned int.
11730 We use "int" or an "unsigned int" as the underlying type, even if
11731 a smaller integral type would work, unless the user has
11732 explicitly requested that we use the smallest possible type. The
11733 user can request that for all enumerations with a command line
11734 flag, or for just one enumeration with an attribute. */
11736 use_short_enum = flag_short_enums
11737 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11739 for (itk = (use_short_enum ? itk_char : itk_int);
11743 underlying_type = integer_types[itk];
11744 if (underlying_type != NULL_TREE
11745 && TYPE_PRECISION (underlying_type) >= precision
11746 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11749 if (itk == itk_none)
11753 IF no integral type can represent all the enumerator values, the
11754 enumeration is ill-formed. */
11755 error ("no integral type can represent all of the enumerator values "
11756 "for %qT", enumtype);
11757 precision = TYPE_PRECISION (long_long_integer_type_node);
11758 underlying_type = integer_types[itk_unsigned_long_long];
11763 The value of sizeof() applied to an enumeration type, an object
11764 of an enumeration type, or an enumerator, is the value of sizeof()
11765 applied to the underlying type. */
11766 copy_type_enum (enumtype, underlying_type);
11768 /* Compute the minimum and maximum values for the type.
11772 For an enumeration where emin is the smallest enumerator and emax
11773 is the largest, the values of the enumeration are the values of the
11774 underlying type in the range bmin to bmax, where bmin and bmax are,
11775 respectively, the smallest and largest values of the smallest bit-
11776 field that can store emin and emax. */
11778 /* The middle-end currently assumes that types with TYPE_PRECISION
11779 narrower than their underlying type are suitably zero or sign
11780 extended to fill their mode. Similarly, it assumes that the front
11781 end assures that a value of a particular type must be within
11782 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11784 We used to set these fields based on bmin and bmax, but that led
11785 to invalid assumptions like optimizing away bounds checking. So
11786 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11787 TYPE_MAX_VALUE to the values for the mode above and only restrict
11788 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11789 ENUM_UNDERLYING_TYPE (enumtype)
11790 = build_distinct_type_copy (underlying_type);
11791 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
11792 set_min_and_max_values_for_integral_type
11793 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11795 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11796 if (flag_strict_enums)
11797 set_min_and_max_values_for_integral_type (enumtype, precision,
11801 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11803 /* Convert each of the enumerators to the type of the underlying
11804 type of the enumeration. */
11805 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11807 location_t saved_location;
11809 decl = TREE_VALUE (values);
11810 saved_location = input_location;
11811 input_location = DECL_SOURCE_LOCATION (decl);
11812 if (fixed_underlying_type_p)
11813 /* If the enumeration type has a fixed underlying type, we
11814 already checked all of the enumerator values. */
11815 value = DECL_INITIAL (decl);
11817 value = perform_implicit_conversion (underlying_type,
11818 DECL_INITIAL (decl),
11819 tf_warning_or_error);
11820 input_location = saved_location;
11822 /* Do not clobber shared ints. */
11823 value = copy_node (value);
11825 TREE_TYPE (value) = enumtype;
11826 DECL_INITIAL (decl) = value;
11829 /* Fix up all variant types of this enum type. */
11830 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11831 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11833 /* Finish debugging output for this type. */
11834 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11837 /* Finishes the enum type. This is called only the first time an
11838 enumeration is seen, be it opaque or odinary.
11839 ENUMTYPE is the type object. */
11842 finish_enum (tree enumtype)
11844 if (processing_template_decl)
11846 if (at_function_scope_p ())
11847 add_stmt (build_min (TAG_DEFN, enumtype));
11851 /* Here there should not be any variants of this type. */
11852 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
11853 && !TYPE_NEXT_VARIANT (enumtype));
11856 /* Build and install a CONST_DECL for an enumeration constant of the
11857 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11858 LOC is the location of NAME.
11859 Assignment of sequential values by default is handled here. */
11862 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
11868 /* If the VALUE was erroneous, pretend it wasn't there; that will
11869 result in the enum being assigned the next value in sequence. */
11870 if (value == error_mark_node)
11873 /* Remove no-op casts from the value. */
11875 STRIP_TYPE_NOPS (value);
11877 if (! processing_template_decl)
11879 /* Validate and default VALUE. */
11880 if (value != NULL_TREE)
11882 value = cxx_constant_value (value);
11884 if (TREE_CODE (value) == INTEGER_CST
11885 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
11887 value = perform_integral_promotions (value);
11891 error ("enumerator value for %qD is not an integer constant", name);
11896 /* Default based on previous value. */
11897 if (value == NULL_TREE)
11899 if (TYPE_VALUES (enumtype))
11902 unsigned HOST_WIDE_INT lo;
11906 /* The next value is the previous value plus one.
11907 add_double doesn't know the type of the target expression,
11908 so we must check with int_fits_type_p as well. */
11909 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11910 if (error_operand_p (prev_value))
11911 value = error_mark_node;
11914 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11915 TREE_INT_CST_HIGH (prev_value),
11917 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11919 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11923 error ("overflow in enumeration values at %qD", name);
11924 value = error_mark_node;
11929 value = integer_zero_node;
11932 /* Remove no-op casts from the value. */
11933 STRIP_TYPE_NOPS (value);
11935 /* If the underlying type of the enum is fixed, check whether
11936 the enumerator values fits in the underlying type. If it
11937 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11938 if (ENUM_UNDERLYING_TYPE (enumtype)
11940 && TREE_CODE (value) == INTEGER_CST
11941 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11943 error ("enumerator value %E is too large for underlying type %<%T%>",
11944 value, ENUM_UNDERLYING_TYPE (enumtype));
11946 /* Silently convert the value so that we can continue. */
11947 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11952 /* C++ associates enums with global, function, or class declarations. */
11953 context = current_scope ();
11955 /* Build the actual enumeration constant. Note that the enumeration
11956 constants have the underlying type of the enum (if it is fixed)
11957 or the type of their initializer (if the underlying type of the
11958 enum is not fixed):
11962 If the underlying type is fixed, the type of each enumerator
11963 prior to the closing brace is the underlying type; if the
11964 initializing value of an enumerator cannot be represented by
11965 the underlying type, the program is ill-formed. If the
11966 underlying type is not fixed, the type of each enumerator is
11967 the type of its initializing value.
11969 If the underlying type is not fixed, it will be computed by
11970 finish_enum and we will reset the type of this enumerator. Of
11971 course, if we're processing a template, there may be no value. */
11972 type = value ? TREE_TYPE (value) : NULL_TREE;
11974 if (context && context == current_class_type)
11975 /* This enum declaration is local to the class. We need the full
11976 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11977 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
11979 /* It's a global enum, or it's local to a function. (Note local to
11980 a function could mean local to a class method. */
11981 decl = build_decl (loc, CONST_DECL, name, type);
11983 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11984 TREE_CONSTANT (decl) = 1;
11985 TREE_READONLY (decl) = 1;
11986 DECL_INITIAL (decl) = value;
11988 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11989 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11990 on the TYPE_FIELDS list for `S'. (That's so that you can say
11991 things like `S::i' later.) */
11992 finish_member_declaration (decl);
11996 /* Add this enumeration constant to the list for this type. */
11997 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12000 /* Look for an enumerator with the given NAME within the enumeration
12001 type ENUMTYPE. This routine is used primarily for qualified name
12002 lookup into an enumerator in C++0x, e.g.,
12004 enum class Color { Red, Green, Blue };
12006 Color color = Color::Red;
12008 Returns the value corresponding to the enumerator, or
12009 NULL_TREE if no such enumerator was found. */
12011 lookup_enumerator (tree enumtype, tree name)
12014 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12016 e = purpose_member (name, TYPE_VALUES (enumtype));
12017 return e? TREE_VALUE (e) : NULL_TREE;
12021 /* We're defining DECL. Make sure that its type is OK. */
12024 check_function_type (tree decl, tree current_function_parms)
12026 tree fntype = TREE_TYPE (decl);
12027 tree return_type = complete_type (TREE_TYPE (fntype));
12029 /* In a function definition, arg types must be complete. */
12030 require_complete_types_for_parms (current_function_parms);
12032 if (dependent_type_p (return_type))
12034 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12035 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12037 tree args = TYPE_ARG_TYPES (fntype);
12039 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12040 error ("return type %q#T is incomplete", return_type);
12042 error ("return type has Java class type %q#T", return_type);
12044 /* Make it return void instead. */
12045 if (TREE_CODE (fntype) == METHOD_TYPE)
12046 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12048 TREE_CHAIN (args));
12050 fntype = build_function_type (void_type_node, args);
12052 = build_exception_variant (fntype,
12053 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12054 fntype = (cp_build_type_attribute_variant
12055 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12056 TREE_TYPE (decl) = fntype;
12059 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12062 /* Create the FUNCTION_DECL for a function definition.
12063 DECLSPECS and DECLARATOR are the parts of the declaration;
12064 they describe the function's name and the type it returns,
12065 but twisted together in a fashion that parallels the syntax of C.
12067 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12068 DECLARATOR is really the DECL for the function we are about to
12069 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12070 indicating that the function is an inline defined in-class.
12072 This function creates a binding context for the function body
12073 as well as setting up the FUNCTION_DECL in current_function_decl.
12075 For C++, we must first check whether that datum makes any sense.
12076 For example, "class A local_a(1,2);" means that variable local_a
12077 is an aggregate of type A, which should have a constructor
12078 applied to it with the argument list [1, 2].
12080 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12081 or may be a BLOCK if the function has been defined previously
12082 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12083 error_mark_node if the function has never been defined, or
12084 a BLOCK if the function has been defined somewhere. */
12087 start_preparsed_function (tree decl1, tree attrs, int flags)
12089 tree ctype = NULL_TREE;
12092 int doing_friend = 0;
12093 struct cp_binding_level *bl;
12094 tree current_function_parms;
12095 struct c_fileinfo *finfo
12096 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12097 bool honor_interface;
12099 /* Sanity check. */
12100 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12101 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12103 fntype = TREE_TYPE (decl1);
12104 if (TREE_CODE (fntype) == METHOD_TYPE)
12105 ctype = TYPE_METHOD_BASETYPE (fntype);
12107 /* ISO C++ 11.4/5. A friend function defined in a class is in
12108 the (lexical) scope of the class in which it is defined. */
12109 if (!ctype && DECL_FRIEND_P (decl1))
12111 ctype = DECL_FRIEND_CONTEXT (decl1);
12113 /* CTYPE could be null here if we're dealing with a template;
12114 for example, `inline friend float foo()' inside a template
12115 will have no CTYPE set. */
12116 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12122 if (DECL_DECLARED_INLINE_P (decl1)
12123 && lookup_attribute ("noinline", attrs))
12124 warning (0, "inline function %q+D given attribute noinline", decl1);
12126 /* Handle gnu_inline attribute. */
12127 if (GNU_INLINE_P (decl1))
12129 DECL_EXTERNAL (decl1) = 1;
12130 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12131 DECL_INTERFACE_KNOWN (decl1) = 1;
12132 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12135 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12136 /* This is a constructor, we must ensure that any default args
12137 introduced by this definition are propagated to the clones
12138 now. The clones are used directly in overload resolution. */
12139 adjust_clone_args (decl1);
12141 /* Sometimes we don't notice that a function is a static member, and
12142 build a METHOD_TYPE for it. Fix that up now. */
12143 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12144 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12146 revert_static_member_fn (decl1);
12150 /* Set up current_class_type, and enter the scope of the class, if
12153 push_nested_class (ctype);
12154 else if (DECL_STATIC_FUNCTION_P (decl1))
12155 push_nested_class (DECL_CONTEXT (decl1));
12157 /* Now that we have entered the scope of the class, we must restore
12158 the bindings for any template parameters surrounding DECL1, if it
12159 is an inline member template. (Order is important; consider the
12160 case where a template parameter has the same name as a field of
12161 the class.) It is not until after this point that
12162 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12163 if (flags & SF_INCLASS_INLINE)
12164 maybe_begin_member_template_processing (decl1);
12166 /* Effective C++ rule 15. */
12168 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12169 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12170 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12172 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12173 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12174 if (!DECL_INITIAL (decl1))
12175 DECL_INITIAL (decl1) = error_mark_node;
12177 /* This function exists in static storage.
12178 (This does not mean `static' in the C sense!) */
12179 TREE_STATIC (decl1) = 1;
12181 /* We must call push_template_decl after current_class_type is set
12182 up. (If we are processing inline definitions after exiting a
12183 class scope, current_class_type will be NULL_TREE until set above
12184 by push_nested_class.) */
12185 if (processing_template_decl)
12187 /* FIXME: Handle error_mark_node more gracefully. */
12188 tree newdecl1 = push_template_decl (decl1);
12189 if (newdecl1 != error_mark_node)
12193 /* We are now in the scope of the function being defined. */
12194 current_function_decl = decl1;
12196 /* Save the parm names or decls from this function's declarator
12197 where store_parm_decls will find them. */
12198 current_function_parms = DECL_ARGUMENTS (decl1);
12200 /* Make sure the parameter and return types are reasonable. When
12201 you declare a function, these types can be incomplete, but they
12202 must be complete when you define the function. */
12203 check_function_type (decl1, current_function_parms);
12205 /* Build the return declaration for the function. */
12206 restype = TREE_TYPE (fntype);
12207 if (DECL_RESULT (decl1) == NULL_TREE)
12211 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12212 DECL_ARTIFICIAL (resdecl) = 1;
12213 DECL_IGNORED_P (resdecl) = 1;
12214 DECL_RESULT (decl1) = resdecl;
12216 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12219 /* Let the user know we're compiling this function. */
12220 announce_function (decl1);
12222 /* Record the decl so that the function name is defined.
12223 If we already have a decl for this name, and it is a FUNCTION_DECL,
12224 use the old decl. */
12225 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12227 /* A specialization is not used to guide overload resolution. */
12228 if (!DECL_FUNCTION_MEMBER_P (decl1)
12229 && !(DECL_USE_TEMPLATE (decl1) &&
12230 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12232 tree olddecl = pushdecl (decl1);
12234 if (olddecl == error_mark_node)
12235 /* If something went wrong when registering the declaration,
12236 use DECL1; we have to have a FUNCTION_DECL to use when
12237 parsing the body of the function. */
12241 /* Otherwise, OLDDECL is either a previous declaration
12242 of the same function or DECL1 itself. */
12244 if (warn_missing_declarations
12245 && olddecl == decl1
12246 && !DECL_MAIN_P (decl1)
12247 && TREE_PUBLIC (decl1)
12248 && !DECL_DECLARED_INLINE_P (decl1))
12252 /* Check whether DECL1 is in an anonymous
12254 for (context = DECL_CONTEXT (decl1);
12256 context = DECL_CONTEXT (context))
12258 if (TREE_CODE (context) == NAMESPACE_DECL
12259 && DECL_NAME (context) == NULL_TREE)
12263 if (context == NULL)
12264 warning (OPT_Wmissing_declarations,
12265 "no previous declaration for %q+D", decl1);
12273 /* We need to set the DECL_CONTEXT. */
12274 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12275 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12277 fntype = TREE_TYPE (decl1);
12279 /* If #pragma weak applies, mark the decl appropriately now.
12280 The pragma only applies to global functions. Because
12281 determining whether or not the #pragma applies involves
12282 computing the mangled name for the declaration, we cannot
12283 apply the pragma until after we have merged this declaration
12284 with any previous declarations; if the original declaration
12285 has a linkage specification, that specification applies to
12286 the definition as well, and may affect the mangled name. */
12287 if (DECL_FILE_SCOPE_P (decl1))
12288 maybe_apply_pragma_weak (decl1);
12291 /* constexpr functions must have literal argument types and
12292 literal return type. */
12293 validate_constexpr_fundecl (decl1);
12295 /* Reset this in case the call to pushdecl changed it. */
12296 current_function_decl = decl1;
12298 gcc_assert (DECL_INITIAL (decl1));
12300 /* This function may already have been parsed, in which case just
12301 return; our caller will skip over the body without parsing. */
12302 if (DECL_INITIAL (decl1) != error_mark_node)
12305 /* Initialize RTL machinery. We cannot do this until
12306 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12307 even when processing a template; this is how we get
12308 CFUN set up, and our per-function variables initialized.
12309 FIXME factor out the non-RTL stuff. */
12310 bl = current_binding_level;
12311 allocate_struct_function (decl1, processing_template_decl);
12313 /* Initialize the language data structures. Whenever we start
12314 a new function, we destroy temporaries in the usual way. */
12315 cfun->language = ggc_alloc_cleared_language_function ();
12316 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12317 current_binding_level = bl;
12319 /* Even though we're inside a function body, we still don't want to
12320 call expand_expr to calculate the size of a variable-sized array.
12321 We haven't necessarily assigned RTL to all variables yet, so it's
12322 not safe to try to expand expressions involving them. */
12323 cfun->dont_save_pending_sizes_p = 1;
12325 /* Start the statement-tree, start the tree now. */
12326 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12328 /* If we are (erroneously) defining a function that we have already
12329 defined before, wipe out what we knew before. */
12330 if (!DECL_PENDING_INLINE_P (decl1))
12331 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12333 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12335 /* We know that this was set up by `grokclassfn'. We do not
12336 wait until `store_parm_decls', since evil parse errors may
12337 never get us to that point. Here we keep the consistency
12338 between `current_class_type' and `current_class_ptr'. */
12339 tree t = DECL_ARGUMENTS (decl1);
12341 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12342 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12344 cp_function_chain->x_current_class_ref
12345 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12346 cp_function_chain->x_current_class_ptr = t;
12348 /* Constructors and destructors need to know whether they're "in
12349 charge" of initializing virtual base classes. */
12350 t = DECL_CHAIN (t);
12351 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12353 current_in_charge_parm = t;
12354 t = DECL_CHAIN (t);
12356 if (DECL_HAS_VTT_PARM_P (decl1))
12358 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12359 current_vtt_parm = t;
12363 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12364 /* Implicitly-defined methods (like the
12365 destructor for a class in which no destructor
12366 is explicitly declared) must not be defined
12367 until their definition is needed. So, we
12368 ignore interface specifications for
12369 compiler-generated functions. */
12370 && !DECL_ARTIFICIAL (decl1));
12372 if (DECL_INTERFACE_KNOWN (decl1))
12374 tree ctx = decl_function_context (decl1);
12376 if (DECL_NOT_REALLY_EXTERN (decl1))
12377 DECL_EXTERNAL (decl1) = 0;
12379 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12380 && TREE_PUBLIC (ctx))
12381 /* This is a function in a local class in an extern inline
12383 comdat_linkage (decl1);
12385 /* If this function belongs to an interface, it is public.
12386 If it belongs to someone else's interface, it is also external.
12387 This only affects inlines and template instantiations. */
12388 else if (!finfo->interface_unknown && honor_interface)
12390 if (DECL_DECLARED_INLINE_P (decl1)
12391 || DECL_TEMPLATE_INSTANTIATION (decl1)
12392 || processing_template_decl)
12394 DECL_EXTERNAL (decl1)
12395 = (finfo->interface_only
12396 || (DECL_DECLARED_INLINE_P (decl1)
12397 && ! flag_implement_inlines
12398 && !DECL_VINDEX (decl1)));
12400 /* For WIN32 we also want to put these in linkonce sections. */
12401 maybe_make_one_only (decl1);
12404 DECL_EXTERNAL (decl1) = 0;
12405 DECL_INTERFACE_KNOWN (decl1) = 1;
12406 /* If this function is in an interface implemented in this file,
12407 make sure that the back end knows to emit this function
12409 if (!DECL_EXTERNAL (decl1))
12410 mark_needed (decl1);
12412 else if (finfo->interface_unknown && finfo->interface_only
12413 && honor_interface)
12415 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12416 interface, we will have both finfo->interface_unknown and
12417 finfo->interface_only set. In that case, we don't want to
12418 use the normal heuristics because someone will supply a
12419 #pragma implementation elsewhere, and deducing it here would
12420 produce a conflict. */
12421 comdat_linkage (decl1);
12422 DECL_EXTERNAL (decl1) = 0;
12423 DECL_INTERFACE_KNOWN (decl1) = 1;
12424 DECL_DEFER_OUTPUT (decl1) = 1;
12428 /* This is a definition, not a reference.
12429 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12430 if (!GNU_INLINE_P (decl1))
12431 DECL_EXTERNAL (decl1) = 0;
12433 if ((DECL_DECLARED_INLINE_P (decl1)
12434 || DECL_TEMPLATE_INSTANTIATION (decl1))
12435 && ! DECL_INTERFACE_KNOWN (decl1))
12436 DECL_DEFER_OUTPUT (decl1) = 1;
12438 DECL_INTERFACE_KNOWN (decl1) = 1;
12441 /* Determine the ELF visibility attribute for the function. We must not
12442 do this before calling "pushdecl", as we must allow "duplicate_decls"
12443 to merge any attributes appropriately. We also need to wait until
12445 if (!DECL_CLONED_FUNCTION_P (decl1))
12446 determine_visibility (decl1);
12448 begin_scope (sk_function_parms, decl1);
12452 if (DECL_DESTRUCTOR_P (decl1)
12453 || (DECL_CONSTRUCTOR_P (decl1)
12454 && targetm.cxx.cdtor_returns_this ()))
12456 cdtor_label = build_decl (input_location,
12457 LABEL_DECL, NULL_TREE, NULL_TREE);
12458 DECL_CONTEXT (cdtor_label) = current_function_decl;
12461 start_fname_decls ();
12463 store_parm_decls (current_function_parms);
12467 /* Like start_preparsed_function, except that instead of a
12468 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12470 Returns 1 on success. If the DECLARATOR is not suitable for a function
12471 (it defines a datum instead), we return 0, which tells
12472 yyparse to report a parse error. */
12475 start_function (cp_decl_specifier_seq *declspecs,
12476 const cp_declarator *declarator,
12481 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12482 if (decl1 == error_mark_node)
12484 /* If the declarator is not suitable for a function definition,
12485 cause a syntax error. */
12486 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12488 error ("invalid function declaration");
12492 if (DECL_MAIN_P (decl1))
12493 /* main must return int. grokfndecl should have corrected it
12494 (and issued a diagnostic) if the user got it wrong. */
12495 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12496 integer_type_node));
12498 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12503 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12507 use_eh_spec_block (tree fn)
12509 return (flag_exceptions && flag_enforce_eh_specs
12510 && !processing_template_decl
12511 && !type_throw_all_p (TREE_TYPE (fn))
12512 /* We insert the EH_SPEC_BLOCK only in the original
12513 function; then, it is copied automatically to the
12515 && !DECL_CLONED_FUNCTION_P (fn)
12516 /* Implicitly-generated constructors and destructors have
12517 exception specifications. However, those specifications
12518 are the union of the possible exceptions specified by the
12519 constructors/destructors for bases and members, so no
12520 unallowed exception will ever reach this function. By
12521 not creating the EH_SPEC_BLOCK we save a little memory,
12522 and we avoid spurious warnings about unreachable
12524 && !DECL_ARTIFICIAL (fn));
12527 /* Store the parameter declarations into the current function declaration.
12528 This is called after parsing the parameter declarations, before
12529 digesting the body of the function.
12531 Also install to binding contour return value identifier, if any. */
12534 store_parm_decls (tree current_function_parms)
12536 tree fndecl = current_function_decl;
12539 /* This is a chain of any other decls that came in among the parm
12540 declarations. If a parm is declared with enum {foo, bar} x;
12541 then CONST_DECLs for foo and bar are put here. */
12542 tree nonparms = NULL_TREE;
12544 if (current_function_parms)
12546 /* This case is when the function was defined with an ANSI prototype.
12547 The parms already have decls, so we need not do anything here
12548 except record them as in effect
12549 and complain if any redundant old-style parm decls were written. */
12551 tree specparms = current_function_parms;
12554 /* Must clear this because it might contain TYPE_DECLs declared
12556 current_binding_level->names = NULL;
12558 /* If we're doing semantic analysis, then we'll call pushdecl
12559 for each of these. We must do them in reverse order so that
12560 they end in the correct forward order. */
12561 specparms = nreverse (specparms);
12563 for (parm = specparms; parm; parm = next)
12565 next = DECL_CHAIN (parm);
12566 if (TREE_CODE (parm) == PARM_DECL)
12568 if (DECL_NAME (parm) == NULL_TREE
12569 || TREE_CODE (parm) != VOID_TYPE)
12572 error ("parameter %qD declared void", parm);
12576 /* If we find an enum constant or a type tag,
12577 put it aside for the moment. */
12578 TREE_CHAIN (parm) = NULL_TREE;
12579 nonparms = chainon (nonparms, parm);
12583 /* Get the decls in their original chain order and record in the
12584 function. This is all and only the PARM_DECLs that were
12585 pushed into scope by the loop above. */
12586 DECL_ARGUMENTS (fndecl) = getdecls ();
12589 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12591 /* Now store the final chain of decls for the arguments
12592 as the decl-chain of the current lexical scope.
12593 Put the enumerators in as well, at the front so that
12594 DECL_ARGUMENTS is not modified. */
12595 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12597 if (use_eh_spec_block (current_function_decl))
12598 current_eh_spec_block = begin_eh_spec_block ();
12602 /* We have finished doing semantic analysis on DECL, but have not yet
12603 generated RTL for its body. Save away our current state, so that
12604 when we want to generate RTL later we know what to do. */
12607 save_function_data (tree decl)
12609 struct language_function *f;
12611 /* Save the language-specific per-function data so that we can
12612 get it back when we really expand this function. */
12613 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12616 f = ggc_alloc_language_function ();
12617 memcpy (f, cp_function_chain, sizeof (struct language_function));
12618 DECL_SAVED_FUNCTION_DATA (decl) = f;
12620 /* Clear out the bits we don't need. */
12621 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12622 f->bindings = NULL;
12623 f->x_local_names = NULL;
12627 /* Set the return value of the constructor (if present). */
12630 finish_constructor_body (void)
12635 if (targetm.cxx.cdtor_returns_this ()
12636 && (! TYPE_FOR_JAVA (current_class_type)))
12638 /* Any return from a constructor will end up here. */
12639 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12641 val = DECL_ARGUMENTS (current_function_decl);
12642 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12643 DECL_RESULT (current_function_decl), val);
12644 /* Return the address of the object. */
12645 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12646 add_stmt (exprstmt);
12650 /* Do all the processing for the beginning of a destructor; set up the
12651 vtable pointers and cleanups for bases and members. */
12654 begin_destructor_body (void)
12656 tree compound_stmt;
12658 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12659 issued an error message. We still want to try to process the
12660 body of the function, but initialize_vtbl_ptrs will crash if
12661 TYPE_BINFO is NULL. */
12662 if (COMPLETE_TYPE_P (current_class_type))
12664 compound_stmt = begin_compound_stmt (0);
12665 /* Make all virtual function table pointers in non-virtual base
12666 classes point to CURRENT_CLASS_TYPE's virtual function
12668 initialize_vtbl_ptrs (current_class_ptr);
12669 finish_compound_stmt (compound_stmt);
12671 /* And insert cleanups for our bases and members so that they
12672 will be properly destroyed if we throw. */
12673 push_base_cleanups ();
12677 /* At the end of every destructor we generate code to delete the object if
12678 necessary. Do that now. */
12681 finish_destructor_body (void)
12685 /* Any return from a destructor will end up here; that way all base
12686 and member cleanups will be run when the function returns. */
12687 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12689 /* In a virtual destructor, we must call delete. */
12690 if (DECL_VIRTUAL_P (current_function_decl))
12693 tree virtual_size = cxx_sizeof (current_class_type);
12697 At the point of definition of a virtual destructor (including
12698 an implicit definition), non-placement operator delete shall
12699 be looked up in the scope of the destructor's class and if
12700 found shall be accessible and unambiguous. */
12701 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12703 /*global_p=*/false,
12704 /*placement=*/NULL_TREE,
12705 /*alloc_fn=*/NULL_TREE);
12707 if_stmt = begin_if_stmt ();
12708 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12709 current_in_charge_parm,
12712 finish_expr_stmt (exprstmt);
12713 finish_then_clause (if_stmt);
12714 finish_if_stmt (if_stmt);
12717 if (targetm.cxx.cdtor_returns_this ())
12721 val = DECL_ARGUMENTS (current_function_decl);
12722 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12723 DECL_RESULT (current_function_decl), val);
12724 /* Return the address of the object. */
12725 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12726 add_stmt (exprstmt);
12730 /* Do the necessary processing for the beginning of a function body, which
12731 in this case includes member-initializers, but not the catch clauses of
12732 a function-try-block. Currently, this means opening a binding level
12733 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12736 begin_function_body (void)
12740 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12743 if (processing_template_decl)
12744 /* Do nothing now. */;
12746 /* Always keep the BLOCK node associated with the outermost pair of
12747 curly braces of a function. These are needed for correct
12748 operation of dwarfout.c. */
12749 keep_next_level (true);
12751 stmt = begin_compound_stmt (BCS_FN_BODY);
12753 if (processing_template_decl)
12754 /* Do nothing now. */;
12755 else if (DECL_DESTRUCTOR_P (current_function_decl))
12756 begin_destructor_body ();
12761 /* Do the processing for the end of a function body. Currently, this means
12762 closing out the cleanups for fully-constructed bases and members, and in
12763 the case of the destructor, deleting the object if desired. Again, this
12764 is only meaningful for [cd]tors, since they are the only functions where
12765 there is a significant distinction between the main body and any
12766 function catch clauses. Handling, say, main() return semantics here
12767 would be wrong, as flowing off the end of a function catch clause for
12768 main() would also need to return 0. */
12771 finish_function_body (tree compstmt)
12773 if (compstmt == NULL_TREE)
12776 /* Close the block. */
12777 finish_compound_stmt (compstmt);
12779 if (processing_template_decl)
12780 /* Do nothing now. */;
12781 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12782 finish_constructor_body ();
12783 else if (DECL_DESTRUCTOR_P (current_function_decl))
12784 finish_destructor_body ();
12787 /* Given a function, returns the BLOCK corresponding to the outermost level
12788 of curly braces, skipping the artificial block created for constructor
12792 outer_curly_brace_block (tree fndecl)
12794 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12795 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12796 /* Skip the artificial function body block. */
12797 block = BLOCK_SUBBLOCKS (block);
12801 /* If FNDECL is a class's key method, add the class to the list of
12802 keyed classes that should be emitted. */
12805 record_key_method_defined (tree fndecl)
12807 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12808 && DECL_VIRTUAL_P (fndecl)
12809 && !processing_template_decl)
12811 tree fnclass = DECL_CONTEXT (fndecl);
12812 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12813 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12817 /* Subroutine of finish_function.
12818 Save the body of constexpr functions for possible
12819 future compile time evaluation. */
12822 maybe_save_function_definition (tree fun)
12824 if (!processing_template_decl
12825 && DECL_DECLARED_CONSTEXPR_P (fun)
12826 && !DECL_CLONED_FUNCTION_P (fun))
12827 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
12830 /* Finish up a function declaration and compile that function
12831 all the way to assembler language output. The free the storage
12832 for the function definition.
12834 FLAGS is a bitwise or of the following values:
12836 We just finished processing the body of an in-class inline
12837 function definition. (This processing will have taken place
12838 after the class definition is complete.) */
12841 finish_function (int flags)
12843 tree fndecl = current_function_decl;
12844 tree fntype, ctype = NULL_TREE;
12845 int inclass_inline = (flags & 2) != 0;
12847 /* When we get some parse errors, we can end up without a
12848 current_function_decl, so cope. */
12849 if (fndecl == NULL_TREE)
12850 return error_mark_node;
12852 if (c_dialect_objc ())
12853 objc_finish_function ();
12855 gcc_assert (!defer_mark_used_calls);
12856 defer_mark_used_calls = true;
12858 record_key_method_defined (fndecl);
12860 fntype = TREE_TYPE (fndecl);
12862 /* TREE_READONLY (fndecl) = 1;
12863 This caused &foo to be of type ptr-to-const-function
12864 which then got a warning when stored in a ptr-to-function variable. */
12866 gcc_assert (building_stmt_tree ());
12867 /* The current function is being defined, so its DECL_INITIAL should
12868 be set, and unless there's a multiple definition, it should be
12869 error_mark_node. */
12870 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12872 /* For a cloned function, we've already got all the code we need;
12873 there's no need to add any extra bits. */
12874 if (!DECL_CLONED_FUNCTION_P (fndecl))
12876 if (DECL_MAIN_P (current_function_decl))
12880 /* Make it so that `main' always returns 0 by default (or
12883 stmt = finish_return_stmt (integer_one_node);
12885 stmt = finish_return_stmt (integer_zero_node);
12887 /* Hack. We don't want the middle-end to warn that this
12888 return is unreachable, so put the statement on the
12891 location_t linezero = linemap_line_start (line_table, 0, 1);
12892 SET_EXPR_LOCATION (stmt, linezero);
12896 if (use_eh_spec_block (current_function_decl))
12897 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12898 (TREE_TYPE (current_function_decl)),
12899 current_eh_spec_block);
12902 /* If we're saving up tree structure, tie off the function now. */
12903 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12905 finish_fname_decls ();
12907 /* If this function can't throw any exceptions, remember that. */
12908 if (!processing_template_decl
12909 && !cp_function_chain->can_throw
12910 && !flag_non_call_exceptions
12911 && !decl_replaceable_p (fndecl))
12912 TREE_NOTHROW (fndecl) = 1;
12914 /* This must come after expand_function_end because cleanups might
12915 have declarations (from inline functions) that need to go into
12916 this function's blocks. */
12918 /* If the current binding level isn't the outermost binding level
12919 for this function, either there is a bug, or we have experienced
12920 syntax errors and the statement tree is malformed. */
12921 if (current_binding_level->kind != sk_function_parms)
12923 /* Make sure we have already experienced errors. */
12924 gcc_assert (errorcount);
12926 /* Throw away the broken statement tree and extra binding
12928 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12930 while (current_binding_level->kind != sk_function_parms)
12932 if (current_binding_level->kind == sk_class)
12933 pop_nested_class ();
12935 poplevel (0, 0, 0);
12938 poplevel (1, 0, 1);
12940 /* Statements should always be full-expressions at the outermost set
12941 of curly braces for a function. */
12942 gcc_assert (stmts_are_full_exprs_p ());
12944 /* Save constexpr function body before it gets munged by
12945 the NRV transformation. */
12946 maybe_save_function_definition (fndecl);
12948 /* Set up the named return value optimization, if we can. Candidate
12949 variables are selected in check_return_expr. */
12950 if (current_function_return_value)
12952 tree r = current_function_return_value;
12955 if (r != error_mark_node
12956 /* This is only worth doing for fns that return in memory--and
12957 simpler, since we don't have to worry about promoted modes. */
12958 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12959 /* Only allow this for variables declared in the outer scope of
12960 the function so we know that their lifetime always ends with a
12961 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12962 we were to do this optimization in tree-ssa. */
12963 && (outer = outer_curly_brace_block (fndecl))
12964 && chain_member (r, BLOCK_VARS (outer)))
12965 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12967 current_function_return_value = NULL_TREE;
12970 /* Remember that we were in class scope. */
12971 if (current_class_name)
12972 ctype = current_class_type;
12974 /* Must mark the RESULT_DECL as being in this function. */
12975 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12977 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12978 to the FUNCTION_DECL node itself. */
12979 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12981 /* Save away current state, if appropriate. */
12982 if (!processing_template_decl)
12983 save_function_data (fndecl);
12985 /* Complain if there's just no return statement. */
12986 if (warn_return_type
12987 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12988 && !dependent_type_p (TREE_TYPE (fntype))
12989 && !current_function_returns_value && !current_function_returns_null
12990 /* Don't complain if we abort or throw. */
12991 && !current_function_returns_abnormally
12992 /* Don't complain if we are declared noreturn. */
12993 && !TREE_THIS_VOLATILE (fndecl)
12994 && !DECL_NAME (DECL_RESULT (fndecl))
12995 && !TREE_NO_WARNING (fndecl)
12996 /* Structor return values (if any) are set by the compiler. */
12997 && !DECL_CONSTRUCTOR_P (fndecl)
12998 && !DECL_DESTRUCTOR_P (fndecl))
13000 warning (OPT_Wreturn_type,
13001 "no return statement in function returning non-void");
13002 TREE_NO_WARNING (fndecl) = 1;
13005 /* Store the end of the function, so that we get good line number
13006 info for the epilogue. */
13007 cfun->function_end_locus = input_location;
13009 /* Complain about parameters that are only set, but never otherwise used. */
13010 if (warn_unused_but_set_parameter
13011 && !processing_template_decl
13012 && errorcount == unused_but_set_errorcount
13013 && !DECL_CLONED_FUNCTION_P (fndecl))
13017 for (decl = DECL_ARGUMENTS (fndecl);
13019 decl = DECL_CHAIN (decl))
13020 if (TREE_USED (decl)
13021 && TREE_CODE (decl) == PARM_DECL
13022 && !DECL_READ_P (decl)
13023 && DECL_NAME (decl)
13024 && !DECL_ARTIFICIAL (decl)
13025 && !TREE_NO_WARNING (decl)
13026 && !DECL_IN_SYSTEM_HEADER (decl)
13027 && TREE_TYPE (decl) != error_mark_node
13028 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13029 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13030 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13031 warning (OPT_Wunused_but_set_parameter,
13032 "parameter %q+D set but not used", decl);
13033 unused_but_set_errorcount = errorcount;
13036 /* Genericize before inlining. */
13037 if (!processing_template_decl)
13039 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13040 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13041 cp_genericize (fndecl);
13042 /* Clear out the bits we don't need. */
13043 f->x_current_class_ptr = NULL;
13044 f->x_current_class_ref = NULL;
13045 f->x_eh_spec_block = NULL;
13046 f->x_in_charge_parm = NULL;
13047 f->x_vtt_parm = NULL;
13048 f->x_return_value = NULL;
13049 f->bindings = NULL;
13050 f->extern_decl_map = NULL;
13052 /* Clear out the bits we don't need. */
13053 local_names = NULL;
13055 /* We're leaving the context of this function, so zap cfun. It's still in
13056 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13058 current_function_decl = NULL;
13060 /* If this is an in-class inline definition, we may have to pop the
13061 bindings for the template parameters that we added in
13062 maybe_begin_member_template_processing when start_function was
13064 if (inclass_inline)
13065 maybe_end_member_template_processing ();
13067 /* Leave the scope of the class. */
13069 pop_nested_class ();
13074 current_function_decl = NULL_TREE;
13076 defer_mark_used_calls = false;
13077 if (deferred_mark_used_calls)
13082 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13084 VEC_free (tree, gc, deferred_mark_used_calls);
13090 /* Create the FUNCTION_DECL for a function definition.
13091 DECLSPECS and DECLARATOR are the parts of the declaration;
13092 they describe the return type and the name of the function,
13093 but twisted together in a fashion that parallels the syntax of C.
13095 This function creates a binding context for the function body
13096 as well as setting up the FUNCTION_DECL in current_function_decl.
13098 Returns a FUNCTION_DECL on success.
13100 If the DECLARATOR is not suitable for a function (it defines a datum
13101 instead), we return 0, which tells yyparse to report a parse error.
13103 May return void_type_node indicating that this method is actually
13104 a friend. See grokfield for more details.
13106 Came here with a `.pushlevel' .
13108 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13109 CHANGES TO CODE IN `grokfield'. */
13112 grokmethod (cp_decl_specifier_seq *declspecs,
13113 const cp_declarator *declarator, tree attrlist)
13115 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13118 if (fndecl == error_mark_node)
13119 return error_mark_node;
13121 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13123 error ("invalid member function declaration");
13124 return error_mark_node;
13128 cplus_decl_attributes (&fndecl, attrlist, 0);
13130 /* Pass friends other than inline friend functions back. */
13131 if (fndecl == void_type_node)
13134 if (DECL_IN_AGGR_P (fndecl))
13136 if (DECL_CLASS_SCOPE_P (fndecl))
13137 error ("%qD is already defined in class %qT", fndecl,
13138 DECL_CONTEXT (fndecl));
13139 return error_mark_node;
13142 check_template_shadow (fndecl);
13144 DECL_DECLARED_INLINE_P (fndecl) = 1;
13145 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13147 /* We process method specializations in finish_struct_1. */
13148 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13150 fndecl = push_template_decl (fndecl);
13151 if (fndecl == error_mark_node)
13155 if (! DECL_FRIEND_P (fndecl))
13157 if (DECL_CHAIN (fndecl))
13159 fndecl = copy_node (fndecl);
13160 TREE_CHAIN (fndecl) = NULL_TREE;
13164 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13166 DECL_IN_AGGR_P (fndecl) = 1;
13171 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13172 we can lay it out later, when and if its type becomes complete. */
13175 maybe_register_incomplete_var (tree var)
13177 gcc_assert (TREE_CODE (var) == VAR_DECL);
13179 /* Keep track of variables with incomplete types. */
13180 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13181 && DECL_EXTERNAL (var))
13183 tree inner_type = TREE_TYPE (var);
13185 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13186 inner_type = TREE_TYPE (inner_type);
13187 inner_type = TYPE_MAIN_VARIANT (inner_type);
13189 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13190 /* RTTI TD entries are created while defining the type_info. */
13191 || (TYPE_LANG_SPECIFIC (inner_type)
13192 && TYPE_BEING_DEFINED (inner_type)))
13195 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13197 iv->incomplete_type = inner_type;
13202 /* Called when a class type (given by TYPE) is defined. If there are
13203 any existing VAR_DECLs whose type has been completed by this
13204 declaration, update them now. */
13207 complete_vars (tree type)
13210 incomplete_var *iv;
13212 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13214 if (same_type_p (type, iv->incomplete_type))
13216 tree var = iv->decl;
13217 tree type = TREE_TYPE (var);
13218 /* Complete the type of the variable. The VAR_DECL itself
13219 will be laid out in expand_expr. */
13220 complete_type (type);
13221 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13222 /* Remove this entry from the list. */
13223 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13229 /* Check for pending declarations which may have abstract type. */
13230 complete_type_check_abstract (type);
13233 /* If DECL is of a type which needs a cleanup, build and return an
13234 expression to perform that cleanup here. Return NULL_TREE if no
13235 cleanup need be done. */
13238 cxx_maybe_build_cleanup (tree decl)
13244 /* Assume no cleanup is required. */
13245 cleanup = NULL_TREE;
13247 if (error_operand_p (decl))
13250 /* Handle "__attribute__((cleanup))". We run the cleanup function
13251 before the destructor since the destructor is what actually
13252 terminates the lifetime of the object. */
13253 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13260 /* Get the name specified by the user for the cleanup function. */
13261 id = TREE_VALUE (TREE_VALUE (attr));
13262 /* Look up the name to find the cleanup function to call. It is
13263 important to use lookup_name here because that is what is
13264 used in c-common.c:handle_cleanup_attribute when performing
13265 initial checks on the attribute. Note that those checks
13266 include ensuring that the function found is not an overloaded
13267 function, or an object with an overloaded call operator,
13268 etc.; we can rely on the fact that the function found is an
13269 ordinary FUNCTION_DECL. */
13270 fn = lookup_name (id);
13271 arg = build_address (decl);
13273 cleanup = cp_build_function_call_nary (fn, tf_warning_or_error,
13276 /* Handle ordinary C++ destructors. */
13277 type = TREE_TYPE (decl);
13278 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13280 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13281 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13282 && CLASSTYPE_VBASECLASSES (type));
13286 if (TREE_CODE (type) == ARRAY_TYPE)
13289 addr = build_address (decl);
13291 /* Optimize for space over speed here. */
13292 if (!has_vbases || flag_expensive_optimizations)
13293 flags |= LOOKUP_NONVIRTUAL;
13295 call = build_delete (TREE_TYPE (addr), addr,
13296 sfk_complete_destructor, flags, 0);
13298 cleanup = build_compound_expr (input_location, cleanup, call);
13306 /* When a stmt has been parsed, this function is called. */
13313 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13314 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13315 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13318 static_fn_type (tree memfntype)
13323 if (TYPE_PTRMEMFUNC_P (memfntype))
13324 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13325 if (POINTER_TYPE_P (memfntype)
13326 || TREE_CODE (memfntype) == FUNCTION_DECL)
13327 memfntype = TREE_TYPE (memfntype);
13328 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13330 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13331 args = TYPE_ARG_TYPES (memfntype);
13332 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13333 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13334 fntype = (cp_build_type_attribute_variant
13335 (fntype, TYPE_ATTRIBUTES (memfntype)));
13336 fntype = (build_exception_variant
13337 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13341 /* DECL was originally constructed as a non-static member function,
13342 but turned out to be static. Update it accordingly. */
13345 revert_static_member_fn (tree decl)
13347 tree stype = static_fn_type (decl);
13349 if (type_memfn_quals (stype) != TYPE_UNQUALIFIED)
13351 error ("static member function %q#D declared with type qualifiers", decl);
13352 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13354 TREE_TYPE (decl) = stype;
13356 if (DECL_ARGUMENTS (decl))
13357 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13358 DECL_STATIC_FUNCTION_P (decl) = 1;
13361 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13362 one of the language-independent trees. */
13364 enum cp_tree_node_structure_enum
13365 cp_tree_node_structure (union lang_tree_node * t)
13367 switch (TREE_CODE (&t->generic))
13369 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13370 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13371 case OVERLOAD: return TS_CP_OVERLOAD;
13372 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13373 case PTRMEM_CST: return TS_CP_PTRMEM;
13374 case BASELINK: return TS_CP_BASELINK;
13375 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13376 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13377 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13378 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13379 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13380 default: return TS_CP_GENERIC;
13384 /* Build the void_list_node (void_type_node having been created). */
13386 build_void_list_node (void)
13388 tree t = build_tree_list (NULL_TREE, void_type_node);
13393 cp_missing_noreturn_ok_p (tree decl)
13395 /* A missing noreturn is ok for the `main' function. */
13396 return DECL_MAIN_P (decl);
13399 /* Return the COMDAT group into which DECL should be placed. */
13402 cxx_comdat_group (tree decl)
13406 /* Virtual tables, construction virtual tables, and virtual table
13407 tables all go in a single COMDAT group, named after the primary
13409 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13410 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13411 /* For all other DECLs, the COMDAT group is the mangled name of the
13412 declaration itself. */
13415 while (DECL_THUNK_P (decl))
13417 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13418 into the same section as the target function. In that case
13419 we must return target's name. */
13420 tree target = THUNK_TARGET (decl);
13421 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13422 && DECL_SECTION_NAME (target) != NULL
13423 && DECL_ONE_ONLY (target))
13428 name = DECL_ASSEMBLER_NAME (decl);
13434 #include "gt-cp-decl.h"