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
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"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 #ifdef NO_IMPLICIT_EXTERN_C
936 /* A new declaration doesn't match a built-in one unless it
937 is also extern "C". */
938 if (DECL_BUILT_IN (olddecl)
939 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1063 permerror (input_location, "previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1117 unsigned olddecl_uid = DECL_UID (olddecl);
1118 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1119 int new_defines_function = 0;
1120 tree new_template_info;
1122 if (newdecl == olddecl)
1125 types_match = decls_match (newdecl, olddecl);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl) == error_mark_node
1133 || TREE_TYPE (olddecl) == error_mark_node)
1134 return error_mark_node;
1136 if (DECL_P (olddecl)
1137 && TREE_CODE (newdecl) == FUNCTION_DECL
1138 && TREE_CODE (olddecl) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1141 if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (newdecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl)
1150 && DECL_UNINLINABLE (olddecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl);
1158 else if (DECL_DECLARED_INLINE_P (olddecl)
1159 && DECL_UNINLINABLE (newdecl)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1162 warning (OPT_Wattributes, "function %q+D redeclared with "
1163 "attribute noinline", newdecl);
1164 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1174 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl))
1186 warning (OPT_Wshadow, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1216 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1221 else if (TREE_VALUE (t2) == fileptr_type_node)
1223 tree t = TREE_VALUE (t1);
1225 if (TREE_CODE (t) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1231 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1235 types_match = decls_match (newdecl, olddecl);
1237 return duplicate_decls (newdecl, olddecl,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1242 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1245 else if ((DECL_EXTERN_C_P (newdecl)
1246 && DECL_EXTERN_C_P (olddecl))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl))
1254 warning (0, "new declaration %q#D", newdecl);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl, olddecl);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl))
1275 tree type = TREE_TYPE (newdecl);
1276 tree attribs = (*targetm.merge_type_attributes)
1277 (TREE_TYPE (olddecl), type);
1279 type = cp_build_type_attribute_variant (type, attribs);
1280 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl)
1287 && TREE_NOTHROW (newdecl)
1288 && !TREE_NOTHROW (olddecl)
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1292 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl) = 0;
1298 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl) = 1;
1303 TREE_PUBLIC (olddecl) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1309 COPY_DECL_RTL (newdecl, olddecl);
1312 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1321 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1324 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1325 && TREE_CODE (newdecl) != TYPE_DECL)
1326 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1327 && TREE_CODE (olddecl) != TYPE_DECL))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1339 || (TREE_CODE (olddecl) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl);
1345 if (TREE_CODE (olddecl) == TREE_LIST)
1346 olddecl = TREE_VALUE (olddecl);
1347 error ("previous declaration of %q+#D", olddecl);
1349 return error_mark_node;
1351 else if (!types_match)
1353 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1366 error ("declaration of template %q#D", newdecl);
1367 error ("conflicts with previous declaration %q+#D", olddecl);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1374 DECL_TEMPLATE_PARMS (olddecl))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1378 TREE_TYPE (TREE_TYPE (olddecl))))
1380 error ("new declaration %q#D", newdecl);
1381 error ("ambiguates old declaration %q+#D", olddecl);
1385 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1387 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1396 error ("new declaration %q#D", newdecl);
1397 error ("ambiguates old declaration %q+#D", olddecl);
1398 return error_mark_node;
1405 error ("conflicting declaration %q#D", newdecl);
1406 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1407 return error_mark_node;
1410 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1412 && (!DECL_TEMPLATE_INFO (newdecl)
1413 || (DECL_TI_TEMPLATE (newdecl)
1414 != DECL_TI_TEMPLATE (olddecl))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1416 && (!DECL_TEMPLATE_INFO (olddecl)
1417 || (DECL_TI_TEMPLATE (olddecl)
1418 != DECL_TI_TEMPLATE (newdecl))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1430 && !DECL_USE_TEMPLATE (newdecl))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1432 && !DECL_USE_TEMPLATE (olddecl))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl)
1448 && (DECL_NAMESPACE_ALIAS (newdecl)
1449 == DECL_NAMESPACE_ALIAS (olddecl)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl);
1459 error ("previous declaration of namespace %q+D here", olddecl);
1460 return error_mark_node;
1464 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1467 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1468 if (DECL_NAME (olddecl) != NULL_TREE)
1469 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl);
1472 return error_mark_node;
1474 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1481 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1482 "follows non-prototype definition here");
1484 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1485 || TREE_CODE (olddecl) == VAR_DECL)
1486 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1489 If two declarations of the same function or object
1490 specify different linkage-specifications ..., the program
1491 is ill-formed.... Except for functions with C++ linkage,
1492 a function declaration without a linkage specification
1493 shall not precede the first linkage specification for
1494 that function. A function can be declared without a
1495 linkage specification after an explicit linkage
1496 specification has been seen; the linkage explicitly
1497 specified in the earlier declaration is not affected by
1498 such a function declaration.
1500 DR 563 raises the question why the restrictions on
1501 functions should not also apply to objects. Older
1502 versions of G++ silently ignore the linkage-specification
1510 which is clearly wrong. Therefore, we now treat objects
1512 if (current_lang_depth () == 0)
1514 /* There is no explicit linkage-specification, so we use
1515 the linkage from the previous declaration. */
1516 if (!DECL_LANG_SPECIFIC (newdecl))
1517 retrofit_lang_decl (newdecl);
1518 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1522 error ("previous declaration of %q+#D with %qL linkage",
1523 olddecl, DECL_LANGUAGE (olddecl));
1524 error ("conflicts with new declaration with %qL linkage",
1525 DECL_LANGUAGE (newdecl));
1529 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1531 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1533 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1534 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1537 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1538 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1540 for (; t1 && t1 != void_list_node;
1541 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1542 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1544 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1547 permerror (input_location, "default argument given for parameter %d of %q#D",
1549 permerror (input_location, "after previous specification in %q+#D", olddecl);
1553 error ("default argument given for parameter %d of %q#D",
1555 error ("after previous specification in %q+#D",
1562 /* Do not merge an implicit typedef with an explicit one. In:
1566 typedef class A A __attribute__ ((foo));
1568 the attribute should apply only to the typedef. */
1569 if (TREE_CODE (olddecl) == TYPE_DECL
1570 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1571 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1574 /* If new decl is `static' and an `extern' was seen previously,
1576 warn_extern_redeclared_static (newdecl, olddecl);
1578 /* We have committed to returning 1 at this point. */
1579 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1581 /* Now that functions must hold information normally held
1582 by field decls, there is extra work to do so that
1583 declaration information does not get destroyed during
1585 if (DECL_VINDEX (olddecl))
1586 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1587 if (DECL_CONTEXT (olddecl))
1588 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1589 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1590 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1591 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1592 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1593 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1594 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1595 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1596 SET_OVERLOADED_OPERATOR_CODE
1597 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1598 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1600 /* Optionally warn about more than one declaration for the same
1601 name, but don't warn about a function declaration followed by a
1603 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1604 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1605 /* Don't warn about extern decl followed by definition. */
1606 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1607 /* Don't warn about friends, let add_friend take care of it. */
1608 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1610 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1611 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1614 if (DECL_DELETED_FN (newdecl))
1616 error ("deleted definition of %qD", newdecl);
1617 error ("after previous declaration %q+D", olddecl);
1621 /* Deal with C++: must preserve virtual function table size. */
1622 if (TREE_CODE (olddecl) == TYPE_DECL)
1624 tree newtype = TREE_TYPE (newdecl);
1625 tree oldtype = TREE_TYPE (olddecl);
1627 if (newtype != error_mark_node && oldtype != error_mark_node
1628 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1629 CLASSTYPE_FRIEND_CLASSES (newtype)
1630 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1632 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1635 /* Copy all the DECL_... slots specified in the new decl
1636 except for any that we copy here from the old type. */
1637 DECL_ATTRIBUTES (newdecl)
1638 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1640 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1644 old_result = DECL_TEMPLATE_RESULT (olddecl);
1645 new_result = DECL_TEMPLATE_RESULT (newdecl);
1646 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1647 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1648 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1649 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1651 DECL_ATTRIBUTES (old_result)
1652 = (*targetm.merge_decl_attributes) (old_result, new_result);
1654 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1656 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1657 && DECL_INITIAL (new_result))
1659 if (DECL_INITIAL (old_result))
1660 DECL_UNINLINABLE (old_result) = 1;
1662 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1663 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1664 DECL_NOT_REALLY_EXTERN (old_result)
1665 = DECL_NOT_REALLY_EXTERN (new_result);
1666 DECL_INTERFACE_KNOWN (old_result)
1667 = DECL_INTERFACE_KNOWN (new_result);
1668 DECL_DECLARED_INLINE_P (old_result)
1669 = DECL_DECLARED_INLINE_P (new_result);
1670 DECL_DISREGARD_INLINE_LIMITS (old_result)
1671 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1676 DECL_DECLARED_INLINE_P (old_result)
1677 |= DECL_DECLARED_INLINE_P (new_result);
1678 DECL_DISREGARD_INLINE_LIMITS (old_result)
1679 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1680 check_redeclaration_exception_specification (newdecl, olddecl);
1684 /* If the new declaration is a definition, update the file and
1685 line information on the declaration, and also make
1686 the old declaration the same definition. */
1687 if (DECL_INITIAL (new_result) != NULL_TREE)
1689 DECL_SOURCE_LOCATION (olddecl)
1690 = DECL_SOURCE_LOCATION (old_result)
1691 = DECL_SOURCE_LOCATION (newdecl);
1692 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1693 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1696 DECL_ARGUMENTS (old_result)
1697 = DECL_ARGUMENTS (new_result);
1698 for (parm = DECL_ARGUMENTS (old_result); parm;
1699 parm = TREE_CHAIN (parm))
1700 DECL_CONTEXT (parm) = old_result;
1709 /* Automatically handles default parameters. */
1710 tree oldtype = TREE_TYPE (olddecl);
1713 /* Merge the data types specified in the two decls. */
1714 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1716 /* If merge_types produces a non-typedef type, just use the old type. */
1717 if (TREE_CODE (newdecl) == TYPE_DECL
1718 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1721 if (TREE_CODE (newdecl) == VAR_DECL)
1723 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1724 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1725 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1726 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1727 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1728 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1730 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1731 if (DECL_LANG_SPECIFIC (olddecl)
1732 && CP_DECL_THREADPRIVATE_P (olddecl))
1734 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1735 if (!DECL_LANG_SPECIFIC (newdecl))
1736 retrofit_lang_decl (newdecl);
1738 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1739 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1743 /* Do this after calling `merge_types' so that default
1744 parameters don't confuse us. */
1745 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 check_redeclaration_exception_specification (newdecl, olddecl);
1747 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1749 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1750 check_default_args (newdecl);
1752 /* Lay the type out, unless already done. */
1753 if (! same_type_p (newtype, oldtype)
1754 && TREE_TYPE (newdecl) != error_mark_node
1755 && !(processing_template_decl && uses_template_parms (newdecl)))
1756 layout_type (TREE_TYPE (newdecl));
1758 if ((TREE_CODE (newdecl) == VAR_DECL
1759 || TREE_CODE (newdecl) == PARM_DECL
1760 || TREE_CODE (newdecl) == RESULT_DECL
1761 || TREE_CODE (newdecl) == FIELD_DECL
1762 || TREE_CODE (newdecl) == TYPE_DECL)
1763 && !(processing_template_decl && uses_template_parms (newdecl)))
1764 layout_decl (newdecl, 0);
1766 /* Merge the type qualifiers. */
1767 if (TREE_READONLY (newdecl))
1768 TREE_READONLY (olddecl) = 1;
1769 if (TREE_THIS_VOLATILE (newdecl))
1770 TREE_THIS_VOLATILE (olddecl) = 1;
1771 if (TREE_NOTHROW (newdecl))
1772 TREE_NOTHROW (olddecl) = 1;
1774 /* Merge deprecatedness. */
1775 if (TREE_DEPRECATED (newdecl))
1776 TREE_DEPRECATED (olddecl) = 1;
1778 /* Preserve function specific target and optimization options */
1779 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1781 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1782 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1783 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1784 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1786 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1787 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1788 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1789 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1792 /* Merge the initialization information. */
1793 if (DECL_INITIAL (newdecl) == NULL_TREE
1794 && DECL_INITIAL (olddecl) != NULL_TREE)
1796 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1797 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1798 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1800 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1801 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1805 /* Merge the section attribute.
1806 We want to issue an error if the sections conflict but that must be
1807 done later in decl_attributes since we are called before attributes
1809 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1810 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1814 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1815 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1816 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1817 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1818 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1819 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1820 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1821 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1822 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1823 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1824 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1825 /* Keep the old RTL. */
1826 COPY_DECL_RTL (olddecl, newdecl);
1828 else if (TREE_CODE (newdecl) == VAR_DECL
1829 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1831 /* Keep the old RTL. We cannot keep the old RTL if the old
1832 declaration was for an incomplete object and the new
1833 declaration is not since many attributes of the RTL will
1835 COPY_DECL_RTL (olddecl, newdecl);
1838 /* If cannot merge, then use the new type and qualifiers,
1839 and don't preserve the old rtl. */
1842 /* Clean out any memory we had of the old declaration. */
1843 tree oldstatic = value_member (olddecl, static_aggregates);
1845 TREE_VALUE (oldstatic) = error_mark_node;
1847 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1848 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1849 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1850 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1853 /* Merge the storage class information. */
1854 merge_weak (newdecl, olddecl);
1856 if (DECL_ONE_ONLY (olddecl))
1857 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1859 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1860 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1861 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1862 if (! DECL_EXTERNAL (olddecl))
1863 DECL_EXTERNAL (newdecl) = 0;
1865 new_template_info = NULL_TREE;
1866 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1868 bool new_redefines_gnu_inline = false;
1870 if (new_defines_function
1871 && ((DECL_INTERFACE_KNOWN (olddecl)
1872 && TREE_CODE (olddecl) == FUNCTION_DECL)
1873 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1874 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1875 == FUNCTION_DECL))))
1879 if (TREE_CODE (fn) == TEMPLATE_DECL)
1880 fn = DECL_TEMPLATE_RESULT (olddecl);
1882 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1885 if (!new_redefines_gnu_inline)
1887 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1888 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1889 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1891 DECL_TEMPLATE_INSTANTIATED (newdecl)
1892 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1894 /* If the OLDDECL is an instantiation and/or specialization,
1895 then the NEWDECL must be too. But, it may not yet be marked
1896 as such if the caller has created NEWDECL, but has not yet
1897 figured out that it is a redeclaration. */
1898 if (!DECL_USE_TEMPLATE (newdecl))
1899 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1901 /* Don't really know how much of the language-specific
1902 values we should copy from old to new. */
1903 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1904 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1905 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1906 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1908 if (LANG_DECL_HAS_MIN (newdecl))
1910 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1911 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1912 if (DECL_TEMPLATE_INFO (newdecl))
1913 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1914 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1916 /* Only functions have these fields. */
1917 if (TREE_CODE (newdecl) == FUNCTION_DECL
1918 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1920 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1921 olddecl_friend = DECL_FRIEND_P (olddecl);
1922 hidden_friend = (DECL_ANTICIPATED (olddecl)
1923 && DECL_HIDDEN_FRIEND_P (olddecl)
1924 && newdecl_is_friend);
1925 DECL_BEFRIENDING_CLASSES (newdecl)
1926 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1927 DECL_BEFRIENDING_CLASSES (olddecl));
1928 /* DECL_THUNKS is only valid for virtual functions,
1929 otherwise it is a DECL_FRIEND_CONTEXT. */
1930 if (DECL_VIRTUAL_P (newdecl))
1931 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1939 /* Merge parameter attributes. */
1940 tree oldarg, newarg;
1941 for (oldarg = DECL_ARGUMENTS(olddecl),
1942 newarg = DECL_ARGUMENTS(newdecl);
1944 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1945 DECL_ATTRIBUTES (newarg)
1946 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1947 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1950 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1951 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1953 /* If newdecl is not a specialization, then it is not a
1954 template-related function at all. And that means that we
1955 should have exited above, returning 0. */
1956 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1958 if (TREE_USED (olddecl))
1959 /* From [temp.expl.spec]:
1961 If a template, a member template or the member of a class
1962 template is explicitly specialized then that
1963 specialization shall be declared before the first use of
1964 that specialization that would cause an implicit
1965 instantiation to take place, in every translation unit in
1966 which such a use occurs. */
1967 error ("explicit specialization of %qD after first use",
1970 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1972 /* Don't propagate visibility from the template to the
1973 specialization here. We'll do that in determine_visibility if
1975 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1977 /* [temp.expl.spec/14] We don't inline explicit specialization
1978 just because the primary template says so. */
1980 else if (new_defines_function && DECL_INITIAL (olddecl))
1982 /* Never inline re-defined extern inline functions.
1983 FIXME: this could be better handled by keeping both
1984 function as separate declarations. */
1985 DECL_UNINLINABLE (newdecl) = 1;
1989 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1990 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1992 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1994 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1995 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1997 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1998 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1999 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2000 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2003 /* Preserve abstractness on cloned [cd]tors. */
2004 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2006 /* Update newdecl's parms to point at olddecl. */
2007 for (parm = DECL_ARGUMENTS (newdecl); parm;
2008 parm = TREE_CHAIN (parm))
2009 DECL_CONTEXT (parm) = olddecl;
2013 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2014 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2015 COPY_DECL_RTL (newdecl, olddecl);
2017 if (! types_match || new_defines_function)
2019 /* These need to be copied so that the names are available.
2020 Note that if the types do match, we'll preserve inline
2021 info and other bits, but if not, we won't. */
2022 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2023 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2025 if (new_defines_function)
2026 /* If defining a function declared with other language
2027 linkage, use the previously declared language linkage. */
2028 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2029 else if (types_match)
2031 /* If redeclaring a builtin function, and not a definition,
2032 it stays built in. */
2033 if (DECL_BUILT_IN (olddecl))
2035 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2036 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2037 /* If we're keeping the built-in definition, keep the rtl,
2038 regardless of declaration matches. */
2039 COPY_DECL_RTL (olddecl, newdecl);
2042 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2043 /* Don't clear out the arguments if we're just redeclaring a
2045 if (DECL_ARGUMENTS (olddecl))
2046 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2049 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2050 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2052 /* Now preserve various other info from the definition. */
2053 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2054 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2055 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2056 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2058 /* Warn about conflicting visibility specifications. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2060 && DECL_VISIBILITY_SPECIFIED (newdecl)
2061 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2063 warning_at (input_location, OPT_Wattributes,
2064 "%q+D: visibility attribute ignored because it", newdecl);
2065 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2066 "conflicts with previous declaration here");
2068 /* Choose the declaration which specified visibility. */
2069 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2071 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2072 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2074 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2075 so keep this behavior. */
2076 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2078 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2079 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2082 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2083 with that from NEWDECL below. */
2084 if (DECL_LANG_SPECIFIC (olddecl))
2086 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2087 != DECL_LANG_SPECIFIC (newdecl));
2088 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2091 /* Merge the USED information. */
2092 if (TREE_USED (olddecl))
2093 TREE_USED (newdecl) = 1;
2094 else if (TREE_USED (newdecl))
2095 TREE_USED (olddecl) = 1;
2097 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2101 function_size = sizeof (struct tree_decl_common);
2103 memcpy ((char *) olddecl + sizeof (struct tree_common),
2104 (char *) newdecl + sizeof (struct tree_common),
2105 function_size - sizeof (struct tree_common));
2107 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2108 (char *) newdecl + sizeof (struct tree_decl_common),
2109 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2110 if (new_template_info)
2111 /* If newdecl is a template instantiation, it is possible that
2112 the following sequence of events has occurred:
2114 o A friend function was declared in a class template. The
2115 class template was instantiated.
2117 o The instantiation of the friend declaration was
2118 recorded on the instantiation list, and is newdecl.
2120 o Later, however, instantiate_class_template called pushdecl
2121 on the newdecl to perform name injection. But, pushdecl in
2122 turn called duplicate_decls when it discovered that another
2123 declaration of a global function with the same name already
2126 o Here, in duplicate_decls, we decided to clobber newdecl.
2128 If we're going to do that, we'd better make sure that
2129 olddecl, and not newdecl, is on the list of
2130 instantiations so that if we try to do the instantiation
2131 again we won't get the clobbered declaration. */
2132 reregister_specialization (newdecl,
2138 size_t size = tree_code_size (TREE_CODE (olddecl));
2139 memcpy ((char *) olddecl + sizeof (struct tree_common),
2140 (char *) newdecl + sizeof (struct tree_common),
2141 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2142 switch (TREE_CODE (olddecl))
2152 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2153 (char *) newdecl + sizeof (struct tree_decl_common),
2154 size - sizeof (struct tree_decl_common)
2155 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2159 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2160 (char *) newdecl + sizeof (struct tree_decl_common),
2161 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2162 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2166 DECL_UID (olddecl) = olddecl_uid;
2168 DECL_FRIEND_P (olddecl) = 1;
2171 DECL_ANTICIPATED (olddecl) = 1;
2172 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2175 /* NEWDECL contains the merged attribute lists.
2176 Update OLDDECL to be the same. */
2177 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2179 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2180 so that encode_section_info has a chance to look at the new decl
2181 flags and attributes. */
2182 if (DECL_RTL_SET_P (olddecl)
2183 && (TREE_CODE (olddecl) == FUNCTION_DECL
2184 || (TREE_CODE (olddecl) == VAR_DECL
2185 && TREE_STATIC (olddecl))))
2186 make_decl_rtl (olddecl);
2188 /* The NEWDECL will no longer be needed. Because every out-of-class
2189 declaration of a member results in a call to duplicate_decls,
2190 freeing these nodes represents in a significant savings. */
2196 /* Return zero if the declaration NEWDECL is valid
2197 when the declaration OLDDECL (assumed to be for the same name)
2198 has already been seen.
2199 Otherwise return an error message format string with a %s
2200 where the identifier should go. */
2203 redeclaration_error_message (tree newdecl, tree olddecl)
2205 if (TREE_CODE (newdecl) == TYPE_DECL)
2207 /* Because C++ can put things into name space for free,
2208 constructs like "typedef struct foo { ... } foo"
2209 would look like an erroneous redeclaration. */
2210 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2213 return "redefinition of %q#D";
2215 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2217 /* If this is a pure function, its olddecl will actually be
2218 the original initialization to `0' (which we force to call
2219 abort()). Don't complain about redefinition in this case. */
2220 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2221 && DECL_INITIAL (olddecl) == NULL_TREE)
2224 /* If both functions come from different namespaces, this is not
2225 a redeclaration - this is a conflict with a used function. */
2226 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2227 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2228 && ! decls_match (olddecl, newdecl))
2229 return "%qD conflicts with used function";
2231 /* We'll complain about linkage mismatches in
2232 warn_extern_redeclared_static. */
2234 /* Defining the same name twice is no good. */
2235 if (DECL_INITIAL (olddecl) != NULL_TREE
2236 && DECL_INITIAL (newdecl) != NULL_TREE)
2238 if (DECL_NAME (olddecl) == NULL_TREE)
2239 return "%q#D not declared in class";
2240 else if (!GNU_INLINE_P (olddecl)
2241 || GNU_INLINE_P (newdecl))
2242 return "redefinition of %q#D";
2245 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2247 bool olda = GNU_INLINE_P (olddecl);
2248 bool newa = GNU_INLINE_P (newdecl);
2253 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2255 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2265 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2267 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2268 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2269 return "redefinition of %q#D";
2273 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2274 || (DECL_TEMPLATE_RESULT (newdecl)
2275 == DECL_TEMPLATE_RESULT (olddecl)))
2278 nt = DECL_TEMPLATE_RESULT (newdecl);
2279 if (DECL_TEMPLATE_INFO (nt))
2280 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2281 ot = DECL_TEMPLATE_RESULT (olddecl);
2282 if (DECL_TEMPLATE_INFO (ot))
2283 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2284 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2285 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2286 return "redefinition of %q#D";
2288 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2290 bool olda = GNU_INLINE_P (ot);
2291 bool newa = GNU_INLINE_P (nt);
2296 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2298 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2302 /* Core issue #226 (C++0x):
2304 If a friend function template declaration specifies a
2305 default template-argument, that declaration shall be a
2306 definition and shall be the only declaration of the
2307 function template in the translation unit. */
2308 if ((cxx_dialect != cxx98)
2309 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2310 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2311 /*is_primary=*/1, /*is_partial=*/0,
2312 /*is_friend_decl=*/2))
2313 return "redeclaration of friend %q#D may not have default template arguments";
2317 else if (TREE_CODE (newdecl) == VAR_DECL
2318 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2319 && (! DECL_LANG_SPECIFIC (olddecl)
2320 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2321 || DECL_THREAD_LOCAL_P (newdecl)))
2323 /* Only variables can be thread-local, and all declarations must
2324 agree on this property. */
2325 if (DECL_THREAD_LOCAL_P (newdecl))
2326 return "thread-local declaration of %q#D follows "
2327 "non-thread-local declaration";
2329 return "non-thread-local declaration of %q#D follows "
2330 "thread-local declaration";
2332 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2334 /* The objects have been declared at namespace scope. If either
2335 is a member of an anonymous union, then this is an invalid
2336 redeclaration. For example:
2342 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2343 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2344 return "redeclaration of %q#D";
2345 /* If at least one declaration is a reference, there is no
2346 conflict. For example:
2352 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2354 /* Reject two definitions. */
2355 return "redefinition of %q#D";
2359 /* Objects declared with block scope: */
2360 /* Reject two definitions, and reject a definition
2361 together with an external reference. */
2362 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2363 return "redeclaration of %q#D";
2368 /* Hash and equality functions for the named_label table. */
2371 named_label_entry_hash (const void *data)
2373 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2374 return DECL_UID (ent->label_decl);
2378 named_label_entry_eq (const void *a, const void *b)
2380 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2381 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2382 return ent_a->label_decl == ent_b->label_decl;
2385 /* Create a new label, named ID. */
2388 make_label_decl (tree id, int local_p)
2390 struct named_label_entry *ent;
2394 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2396 DECL_CONTEXT (decl) = current_function_decl;
2397 DECL_MODE (decl) = VOIDmode;
2398 C_DECLARED_LABEL_FLAG (decl) = local_p;
2400 /* Say where one reference is to the label, for the sake of the
2401 error if it is not defined. */
2402 DECL_SOURCE_LOCATION (decl) = input_location;
2404 /* Record the fact that this identifier is bound to this label. */
2405 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2407 /* Create the label htab for the function on demand. */
2409 named_labels = htab_create_ggc (13, named_label_entry_hash,
2410 named_label_entry_eq, NULL);
2412 /* Record this label on the list of labels used in this function.
2413 We do this before calling make_label_decl so that we get the
2414 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2415 ent = GGC_CNEW (struct named_label_entry);
2416 ent->label_decl = decl;
2418 slot = htab_find_slot (named_labels, ent, INSERT);
2419 gcc_assert (*slot == NULL);
2425 /* Look for a label named ID in the current function. If one cannot
2426 be found, create one. (We keep track of used, but undefined,
2427 labels, and complain about them at the end of a function.) */
2430 lookup_label (tree id)
2434 timevar_push (TV_NAME_LOOKUP);
2435 /* You can't use labels at global scope. */
2436 if (current_function_decl == NULL_TREE)
2438 error ("label %qE referenced outside of any function", id);
2439 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2442 /* See if we've already got this label. */
2443 decl = IDENTIFIER_LABEL_VALUE (id);
2444 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2445 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2447 decl = make_label_decl (id, /*local_p=*/0);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2451 /* Declare a local label named ID. */
2454 declare_local_label (tree id)
2458 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2459 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2460 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2461 current_binding_level->shadowed_labels);
2462 current_binding_level->shadowed_labels = shadow;
2464 decl = make_label_decl (id, /*local_p=*/1);
2465 TREE_VALUE (shadow) = decl;
2470 /* Returns nonzero if it is ill-formed to jump past the declaration of
2471 DECL. Returns 2 if it's also a real problem. */
2474 decl_jump_unsafe (tree decl)
2476 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2477 with automatic storage duration is not in scope to a point where it is
2478 in scope is ill-formed unless the variable has scalar type, class type
2479 with a trivial default constructor and a trivial destructor, a
2480 cv-qualified version of one of these types, or an array of one of the
2481 preceding types and is declared without an initializer (8.5). */
2482 tree type = TREE_TYPE (decl);
2484 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2485 || type == error_mark_node)
2488 type = strip_array_types (type);
2490 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2491 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2494 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2500 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2503 identify_goto (tree decl, const location_t *locus)
2506 permerror (input_location, "jump to label %qD", decl);
2508 permerror (input_location, "jump to case label");
2510 permerror (*locus, " from here");
2513 /* Check that a single previously seen jump to a newly defined label
2514 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2515 the jump context; NAMES are the names in scope in LEVEL at the jump
2516 context; LOCUS is the source position of the jump or 0. Returns
2517 true if all is well. */
2520 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2521 bool exited_omp, const location_t *locus)
2523 struct cp_binding_level *b;
2524 bool identified = false, saw_eh = false, saw_omp = false;
2528 identify_goto (decl, locus);
2529 error (" exits OpenMP structured block");
2530 identified = saw_omp = true;
2533 for (b = current_binding_level; b ; b = b->level_chain)
2535 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2537 for (new_decls = b->names; new_decls != old_decls;
2538 new_decls = TREE_CHAIN (new_decls))
2540 int problem = decl_jump_unsafe (new_decls);
2546 identify_goto (decl, locus);
2550 error (" crosses initialization of %q+#D", new_decls);
2552 permerror (input_location, " enters scope of %q+#D which has "
2553 "non-trivial destructor", new_decls);
2558 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2562 identify_goto (decl, locus);
2565 if (b->kind == sk_try)
2566 error (" enters try block");
2568 error (" enters catch block");
2571 if (b->kind == sk_omp && !saw_omp)
2575 identify_goto (decl, locus);
2578 error (" enters OpenMP structured block");
2587 check_previous_goto (tree decl, struct named_label_use_entry *use)
2589 check_previous_goto_1 (decl, use->binding_level,
2590 use->names_in_scope, use->in_omp_scope,
2591 &use->o_goto_locus);
2595 check_switch_goto (struct cp_binding_level* level)
2597 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2600 /* Check that a new jump to a label DECL is OK. Called by
2601 finish_goto_stmt. */
2604 check_goto (tree decl)
2606 struct named_label_entry *ent, dummy;
2607 bool saw_catch = false, identified = false;
2610 /* We can't know where a computed goto is jumping.
2611 So we assume that it's OK. */
2612 if (TREE_CODE (decl) != LABEL_DECL)
2615 /* We didn't record any information about this label when we created it,
2616 and there's not much point since it's trivial to analyze as a return. */
2617 if (decl == cdtor_label)
2620 dummy.label_decl = decl;
2621 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2622 gcc_assert (ent != NULL);
2624 /* If the label hasn't been defined yet, defer checking. */
2625 if (! DECL_INITIAL (decl))
2627 struct named_label_use_entry *new_use;
2629 /* Don't bother creating another use if the last goto had the
2630 same data, and will therefore create the same set of errors. */
2632 && ent->uses->names_in_scope == current_binding_level->names)
2635 new_use = GGC_NEW (struct named_label_use_entry);
2636 new_use->binding_level = current_binding_level;
2637 new_use->names_in_scope = current_binding_level->names;
2638 new_use->o_goto_locus = input_location;
2639 new_use->in_omp_scope = false;
2641 new_use->next = ent->uses;
2642 ent->uses = new_use;
2646 if (ent->in_try_scope || ent->in_catch_scope
2647 || ent->in_omp_scope || ent->bad_decls)
2649 permerror (input_location, "jump to label %q+D", decl);
2650 permerror (input_location, " from here");
2654 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2656 tree b = TREE_VALUE (bad);
2657 int u = decl_jump_unsafe (b);
2659 if (u > 1 && DECL_ARTIFICIAL (b))
2661 /* Can't skip init of __exception_info. */
2662 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2666 error (" skips initialization of %q+#D", b);
2668 permerror (input_location, " enters scope of %q+#D which has "
2669 "non-trivial destructor", b);
2672 if (ent->in_try_scope)
2673 error (" enters try block");
2674 else if (ent->in_catch_scope && !saw_catch)
2675 error (" enters catch block");
2677 if (ent->in_omp_scope)
2678 error (" enters OpenMP structured block");
2679 else if (flag_openmp)
2681 struct cp_binding_level *b;
2682 for (b = current_binding_level; b ; b = b->level_chain)
2684 if (b == ent->binding_level)
2686 if (b->kind == sk_omp)
2690 permerror (input_location, "jump to label %q+D", decl);
2691 permerror (input_location, " from here");
2694 error (" exits OpenMP structured block");
2701 /* Check that a return is ok wrt OpenMP structured blocks.
2702 Called by finish_return_stmt. Returns true if all is well. */
2705 check_omp_return (void)
2707 struct cp_binding_level *b;
2708 for (b = current_binding_level; b ; b = b->level_chain)
2709 if (b->kind == sk_omp)
2711 error ("invalid exit from OpenMP structured block");
2717 /* Define a label, specifying the location in the source file.
2718 Return the LABEL_DECL node for the label. */
2721 define_label (location_t location, tree name)
2723 struct named_label_entry *ent, dummy;
2724 struct cp_binding_level *p;
2727 timevar_push (TV_NAME_LOOKUP);
2729 decl = lookup_label (name);
2731 dummy.label_decl = decl;
2732 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2733 gcc_assert (ent != NULL);
2735 /* After labels, make any new cleanups in the function go into their
2736 own new (temporary) binding contour. */
2737 for (p = current_binding_level;
2738 p->kind != sk_function_parms;
2740 p->more_cleanups_ok = 0;
2742 if (name == get_identifier ("wchar_t"))
2743 permerror (input_location, "label named wchar_t");
2745 if (DECL_INITIAL (decl) != NULL_TREE)
2747 error ("duplicate label %qD", decl);
2748 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2752 struct named_label_use_entry *use;
2754 /* Mark label as having been defined. */
2755 DECL_INITIAL (decl) = error_mark_node;
2756 /* Say where in the source. */
2757 DECL_SOURCE_LOCATION (decl) = location;
2759 ent->binding_level = current_binding_level;
2760 ent->names_in_scope = current_binding_level->names;
2762 for (use = ent->uses; use ; use = use->next)
2763 check_previous_goto (decl, use);
2767 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2772 struct cp_binding_level *level;
2773 struct cp_switch *next;
2774 /* The SWITCH_STMT being built. */
2776 /* A splay-tree mapping the low element of a case range to the high
2777 element, or NULL_TREE if there is no high element. Used to
2778 determine whether or not a new case label duplicates an old case
2779 label. We need a tree, rather than simply a hash table, because
2780 of the GNU case range extension. */
2784 /* A stack of the currently active switch statements. The innermost
2785 switch statement is on the top of the stack. There is no need to
2786 mark the stack for garbage collection because it is only active
2787 during the processing of the body of a function, and we never
2788 collect at that point. */
2790 static struct cp_switch *switch_stack;
2792 /* Called right after a switch-statement condition is parsed.
2793 SWITCH_STMT is the switch statement being parsed. */
2796 push_switch (tree switch_stmt)
2798 struct cp_switch *p = XNEW (struct cp_switch);
2799 p->level = current_binding_level;
2800 p->next = switch_stack;
2801 p->switch_stmt = switch_stmt;
2802 p->cases = splay_tree_new (case_compare, NULL, NULL);
2809 struct cp_switch *cs = switch_stack;
2810 location_t switch_location;
2812 /* Emit warnings as needed. */
2813 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2814 switch_location = EXPR_LOCATION (cs->switch_stmt);
2816 switch_location = input_location;
2817 if (!processing_template_decl)
2818 c_do_switch_warnings (cs->cases, switch_location,
2819 SWITCH_STMT_TYPE (cs->switch_stmt),
2820 SWITCH_STMT_COND (cs->switch_stmt));
2822 splay_tree_delete (cs->cases);
2823 switch_stack = switch_stack->next;
2827 /* Note that we've seen a definition of a case label, and complain if this
2828 is a bad place for one. */
2831 finish_case_label (location_t loc, tree low_value, tree high_value)
2834 struct cp_binding_level *p;
2836 if (processing_template_decl)
2840 /* For templates, just add the case label; we'll do semantic
2841 analysis at instantiation-time. */
2842 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2843 return add_stmt (build_case_label (loc, low_value, high_value, label));
2846 /* Find the condition on which this switch statement depends. */
2847 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2848 if (cond && TREE_CODE (cond) == TREE_LIST)
2849 cond = TREE_VALUE (cond);
2851 if (!check_switch_goto (switch_stack->level))
2852 return error_mark_node;
2854 r = c_add_case_label (loc, switch_stack->cases, cond,
2855 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2856 low_value, high_value);
2858 /* After labels, make any new cleanups in the function go into their
2859 own new (temporary) binding contour. */
2860 for (p = current_binding_level;
2861 p->kind != sk_function_parms;
2863 p->more_cleanups_ok = 0;
2868 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2871 typename_hash (const void* k)
2874 const_tree const t = (const_tree) k;
2876 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2877 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2882 typedef struct typename_info {
2890 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2891 really of type `typename_info*' */
2894 typename_compare (const void * k1, const void * k2)
2896 const_tree const t1 = (const_tree) k1;
2897 const typename_info *const t2 = (const typename_info *) k2;
2899 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2900 && TYPE_CONTEXT (t1) == t2->scope
2901 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2902 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2903 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2906 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2907 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2909 Returns the new TYPENAME_TYPE. */
2911 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2914 build_typename_type (tree context, tree name, tree fullname,
2915 enum tag_types tag_type)
2923 if (typename_htab == NULL)
2924 typename_htab = htab_create_ggc (61, &typename_hash,
2925 &typename_compare, NULL);
2927 ti.scope = FROB_CONTEXT (context);
2929 ti.template_id = fullname;
2930 ti.enum_p = tag_type == enum_type;
2931 ti.class_p = (tag_type == class_type
2932 || tag_type == record_type
2933 || tag_type == union_type);
2934 hash = (htab_hash_pointer (ti.scope)
2935 ^ htab_hash_pointer (ti.name));
2937 /* See if we already have this type. */
2938 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2943 /* Build the TYPENAME_TYPE. */
2944 t = cxx_make_type (TYPENAME_TYPE);
2945 TYPE_CONTEXT (t) = ti.scope;
2946 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2947 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2948 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2950 /* Build the corresponding TYPE_DECL. */
2951 d = build_decl (input_location, TYPE_DECL, name, t);
2952 TYPE_NAME (TREE_TYPE (d)) = d;
2953 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2954 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2955 DECL_ARTIFICIAL (d) = 1;
2957 /* Store it in the hash table. */
2960 /* TYPENAME_TYPEs must always be compared structurally, because
2961 they may or may not resolve down to another type depending on
2962 the currently open classes. */
2963 SET_TYPE_STRUCTURAL_EQUALITY (t);
2969 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2970 provided to name the type. Returns an appropriate type, unless an
2971 error occurs, in which case error_mark_node is returned. If we
2972 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2973 return that, rather than the _TYPE it corresponds to, in other
2974 cases we look through the type decl. If TF_ERROR is set, complain
2975 about errors, otherwise be quiet. */
2978 make_typename_type (tree context, tree name, enum tag_types tag_type,
2979 tsubst_flags_t complain)
2985 if (name == error_mark_node
2986 || context == NULL_TREE
2987 || context == error_mark_node)
2988 return error_mark_node;
2992 if (!(TYPE_LANG_SPECIFIC (name)
2993 && (CLASSTYPE_IS_TEMPLATE (name)
2994 || CLASSTYPE_USE_TEMPLATE (name))))
2995 name = TYPE_IDENTIFIER (name);
2997 /* Create a TEMPLATE_ID_EXPR for the type. */
2998 name = build_nt (TEMPLATE_ID_EXPR,
2999 CLASSTYPE_TI_TEMPLATE (name),
3000 CLASSTYPE_TI_ARGS (name));
3002 else if (TREE_CODE (name) == TYPE_DECL)
3003 name = DECL_NAME (name);
3007 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3009 name = TREE_OPERAND (name, 0);
3010 if (TREE_CODE (name) == TEMPLATE_DECL)
3011 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3012 else if (TREE_CODE (name) == OVERLOAD)
3014 error ("%qD is not a type", name);
3015 return error_mark_node;
3018 if (TREE_CODE (name) == TEMPLATE_DECL)
3020 error ("%qD used without template parameters", name);
3021 return error_mark_node;
3023 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3024 gcc_assert (TYPE_P (context));
3026 if (!MAYBE_CLASS_TYPE_P (context))
3028 if (complain & tf_error)
3029 error ("%q#T is not a class", context);
3030 return error_mark_node;
3033 /* When the CONTEXT is a dependent type, NAME could refer to a
3034 dependent base class of CONTEXT. But look inside it anyway
3035 if CONTEXT is a currently open scope, in case it refers to a
3036 member of the current instantiation or a non-dependent base;
3037 lookup will stop when we hit a dependent base. */
3038 if (!dependent_scope_p (context))
3039 /* We should only set WANT_TYPE when we're a nested typename type.
3040 Then we can give better diagnostics if we find a non-type. */
3041 t = lookup_field (context, name, 0, /*want_type=*/true);
3045 if (!t && dependent_type_p (context))
3046 return build_typename_type (context, name, fullname, tag_type);
3048 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3052 if (complain & tf_error)
3053 error (want_template ? "no class template named %q#T in %q#T"
3054 : "no type named %q#T in %q#T", name, context);
3055 return error_mark_node;
3058 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3060 if (complain & tf_error)
3061 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3063 return error_mark_node;
3065 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3067 if (complain & tf_error)
3068 error ("%<typename %T::%D%> names %q#T, which is not a type",
3070 return error_mark_node;
3073 if (complain & tf_error)
3074 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3077 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3079 /*entering_scope=*/0,
3080 tf_warning_or_error | tf_user);
3082 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3088 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3089 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3090 in which case error_mark_node is returned.
3092 If PARM_LIST is non-NULL, also make sure that the template parameter
3093 list of TEMPLATE_DECL matches.
3095 If COMPLAIN zero, don't complain about any errors that occur. */
3098 make_unbound_class_template (tree context, tree name, tree parm_list,
3099 tsubst_flags_t complain)
3105 name = TYPE_IDENTIFIER (name);
3106 else if (DECL_P (name))
3107 name = DECL_NAME (name);
3108 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3110 if (!dependent_type_p (context)
3111 || currently_open_class (context))
3113 tree tmpl = NULL_TREE;
3115 if (MAYBE_CLASS_TYPE_P (context))
3116 tmpl = lookup_field (context, name, 0, false);
3118 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3120 if (complain & tf_error)
3121 error ("no class template named %q#T in %q#T", name, context);
3122 return error_mark_node;
3126 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3128 if (complain & tf_error)
3130 error ("template parameters do not match template");
3131 error ("%q+D declared here", tmpl);
3133 return error_mark_node;
3136 if (complain & tf_error)
3137 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3142 /* Build the UNBOUND_CLASS_TEMPLATE. */
3143 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3144 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3145 TREE_TYPE (t) = NULL_TREE;
3146 SET_TYPE_STRUCTURAL_EQUALITY (t);
3148 /* Build the corresponding TEMPLATE_DECL. */
3149 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3150 TYPE_NAME (TREE_TYPE (d)) = d;
3151 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3152 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3153 DECL_ARTIFICIAL (d) = 1;
3154 DECL_TEMPLATE_PARMS (d) = parm_list;
3161 /* Push the declarations of builtin types into the namespace.
3162 RID_INDEX is the index of the builtin type in the array
3163 RID_POINTERS. NAME is the name used when looking up the builtin
3164 type. TYPE is the _TYPE node for the builtin type. */
3167 record_builtin_type (enum rid rid_index,
3171 tree rname = NULL_TREE, tname = NULL_TREE;
3172 tree tdecl = NULL_TREE;
3174 if ((int) rid_index < (int) RID_MAX)
3175 rname = ridpointers[(int) rid_index];
3177 tname = get_identifier (name);
3179 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3180 eliminated. Built-in types should not be looked up name; their
3181 names are keywords that the parser can recognize. However, there
3182 is code in c-common.c that uses identifier_global_value to look
3183 up built-in types by name. */
3186 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3187 DECL_ARTIFICIAL (tdecl) = 1;
3188 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3194 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3195 DECL_ARTIFICIAL (tdecl) = 1;
3197 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3200 if (!TYPE_NAME (type))
3201 TYPE_NAME (type) = tdecl;
3204 debug_hooks->type_decl (tdecl, 0);
3207 /* Record one of the standard Java types.
3208 * Declare it as having the given NAME.
3209 * If SIZE > 0, it is the size of one of the integral types;
3210 * otherwise it is the negative of the size of one of the other types. */
3213 record_builtin_java_type (const char* name, int size)
3217 type = build_nonstandard_integer_type (size, 0);
3218 else if (size > -32)
3221 /* "__java_char" or ""__java_boolean". */
3222 type = build_nonstandard_integer_type (-size, 1);
3223 /* Get the signed type cached and attached to the unsigned type,
3224 so it doesn't get garbage-collected at "random" times,
3225 causing potential codegen differences out of different UIDs
3226 and different alias set numbers. */
3227 stype = build_nonstandard_integer_type (-size, 0);
3228 TREE_CHAIN (type) = stype;
3229 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3232 { /* "__java_float" or ""__java_double". */
3233 type = make_node (REAL_TYPE);
3234 TYPE_PRECISION (type) = - size;
3237 record_builtin_type (RID_MAX, name, type);
3238 decl = TYPE_NAME (type);
3240 /* Suppress generate debug symbol entries for these types,
3241 since for normal C++ they are just clutter.
3242 However, push_lang_context undoes this if extern "Java" is seen. */
3243 DECL_IGNORED_P (decl) = 1;
3245 TYPE_FOR_JAVA (type) = 1;
3249 /* Push a type into the namespace so that the back ends ignore it. */
3252 record_unknown_type (tree type, const char* name)
3254 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3255 TYPE_DECL, get_identifier (name), type));
3256 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3257 DECL_IGNORED_P (decl) = 1;
3258 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3259 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3260 TYPE_ALIGN (type) = 1;
3261 TYPE_USER_ALIGN (type) = 0;
3262 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3265 /* A string for which we should create an IDENTIFIER_NODE at
3268 typedef struct predefined_identifier
3270 /* The name of the identifier. */
3271 const char *const name;
3272 /* The place where the IDENTIFIER_NODE should be stored. */
3274 /* Nonzero if this is the name of a constructor or destructor. */
3275 const int ctor_or_dtor_p;
3276 } predefined_identifier;
3278 /* Create all the predefined identifiers. */
3281 initialize_predefined_identifiers (void)
3283 const predefined_identifier *pid;
3285 /* A table of identifiers to create at startup. */
3286 static const predefined_identifier predefined_identifiers[] = {
3287 { "C++", &lang_name_cplusplus, 0 },
3288 { "C", &lang_name_c, 0 },
3289 { "Java", &lang_name_java, 0 },
3290 /* Some of these names have a trailing space so that it is
3291 impossible for them to conflict with names written by users. */
3292 { "__ct ", &ctor_identifier, 1 },
3293 { "__base_ctor ", &base_ctor_identifier, 1 },
3294 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3295 { "__dt ", &dtor_identifier, 1 },
3296 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3297 { "__base_dtor ", &base_dtor_identifier, 1 },
3298 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3299 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3300 { "nelts", &nelts_identifier, 0 },
3301 { THIS_NAME, &this_identifier, 0 },
3302 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3303 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3304 { "_vptr", &vptr_identifier, 0 },
3305 { "__vtt_parm", &vtt_parm_identifier, 0 },
3306 { "::", &global_scope_name, 0 },
3307 { "std", &std_identifier, 0 },
3311 for (pid = predefined_identifiers; pid->name; ++pid)
3313 *pid->node = get_identifier (pid->name);
3314 if (pid->ctor_or_dtor_p)
3315 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3319 /* Create the predefined scalar types of C,
3320 and some nodes representing standard constants (0, 1, (void *)0).
3321 Initialize the global binding level.
3322 Make definitions for built-in primitive functions. */
3325 cxx_init_decl_processing (void)
3328 tree void_ftype_ptr;
3330 build_common_tree_nodes (flag_signed_char, false);
3332 /* Create all the identifiers we need. */
3333 initialize_predefined_identifiers ();
3335 /* Create the global variables. */
3336 push_to_top_level ();
3338 current_function_decl = NULL_TREE;
3339 current_binding_level = NULL;
3340 /* Enter the global namespace. */
3341 gcc_assert (global_namespace == NULL_TREE);
3342 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3344 TREE_PUBLIC (global_namespace) = 1;
3345 begin_scope (sk_namespace, global_namespace);
3347 current_lang_name = NULL_TREE;
3349 if (flag_visibility_ms_compat)
3350 default_visibility = VISIBILITY_HIDDEN;
3353 current_lang_name = lang_name_c;
3355 /* Create the `std' namespace. */
3356 push_namespace (std_identifier);
3357 std_node = current_namespace;
3360 c_common_nodes_and_builtins ();
3362 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3363 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3364 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3365 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3366 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3367 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3368 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3369 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3371 integer_two_node = build_int_cst (NULL_TREE, 2);
3372 integer_three_node = build_int_cst (NULL_TREE, 3);
3374 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3375 truthvalue_type_node = boolean_type_node;
3376 truthvalue_false_node = boolean_false_node;
3377 truthvalue_true_node = boolean_true_node;
3379 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3382 record_builtin_type (RID_MAX, NULL, string_type_node);
3385 delta_type_node = ptrdiff_type_node;
3386 vtable_index_type = ptrdiff_type_node;
3388 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3389 void_ftype = build_function_type (void_type_node, void_list_node);
3390 void_ftype_ptr = build_function_type (void_type_node,
3391 tree_cons (NULL_TREE,
3395 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3397 /* C++ extensions */
3399 unknown_type_node = make_node (UNKNOWN_TYPE);
3400 record_unknown_type (unknown_type_node, "unknown type");
3402 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3403 TREE_TYPE (unknown_type_node) = unknown_type_node;
3405 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3407 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3408 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3410 init_list_type_node = make_node (UNKNOWN_TYPE);
3411 record_unknown_type (init_list_type_node, "init list");
3414 /* Make sure we get a unique function type, so we can give
3415 its pointer type a name. (This wins for gdb.) */
3416 tree vfunc_type = make_node (FUNCTION_TYPE);
3417 TREE_TYPE (vfunc_type) = integer_type_node;
3418 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3419 layout_type (vfunc_type);
3421 vtable_entry_type = build_pointer_type (vfunc_type);
3423 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3426 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3427 layout_type (vtbl_type_node);
3428 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3429 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3430 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3431 layout_type (vtbl_ptr_type_node);
3432 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3434 push_namespace (get_identifier ("__cxxabiv1"));
3435 abi_node = current_namespace;
3438 global_type_node = make_node (LANG_TYPE);
3439 record_unknown_type (global_type_node, "global type");
3442 current_lang_name = lang_name_cplusplus;
3446 tree bad_alloc_type_node;
3447 tree bad_alloc_decl;
3448 tree newtype, deltype;
3449 tree ptr_ftype_sizetype;
3451 push_namespace (std_identifier);
3452 bad_alloc_id = get_identifier ("bad_alloc");
3453 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3454 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3456 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3457 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3458 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3462 = build_function_type (ptr_type_node,
3463 tree_cons (NULL_TREE,
3466 newtype = build_exception_variant
3467 (ptr_ftype_sizetype, add_exception_specifier
3468 (NULL_TREE, bad_alloc_type_node, -1));
3469 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3470 push_cp_library_fn (NEW_EXPR, newtype);
3471 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3472 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3473 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3477 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3479 /* Perform other language dependent initializations. */
3480 init_class_processing ();
3481 init_rtti_processing ();
3482 init_template_processing ();
3484 if (flag_exceptions)
3485 init_exception_processing ();
3487 if (! supports_one_only ())
3490 make_fname_decl = cp_make_fname_decl;
3491 start_fname_decls ();
3493 /* Show we use EH for cleanups. */
3494 if (flag_exceptions)
3495 using_eh_for_cleanups ();
3498 /* Generate an initializer for a function naming variable from
3499 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3500 filled in with the type of the init. */
3503 cp_fname_init (const char* name, tree *type_p)
3505 tree domain = NULL_TREE;
3507 tree init = NULL_TREE;
3512 length = strlen (name);
3513 domain = build_index_type (size_int (length));
3514 init = build_string (length + 1, name);
3517 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3518 type = build_cplus_array_type (type, domain);
3523 TREE_TYPE (init) = type;
3525 init = error_mark_node;
3530 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3531 the decl, LOC is the location to give the decl, NAME is the
3532 initialization string and TYPE_DEP indicates whether NAME depended
3533 on the type of the function. We make use of that to detect
3534 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3535 at the point of first use, so we mustn't push the decl now. */
3538 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3540 const char *const name = (type_dep && processing_template_decl
3541 ? NULL : fname_as_string (type_dep));
3543 tree init = cp_fname_init (name, &type);
3544 tree decl = build_decl (loc, VAR_DECL, id, type);
3547 free (CONST_CAST (char *, name));
3549 /* As we're using pushdecl_with_scope, we must set the context. */
3550 DECL_CONTEXT (decl) = current_function_decl;
3551 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3553 TREE_STATIC (decl) = 1;
3554 TREE_READONLY (decl) = 1;
3555 DECL_ARTIFICIAL (decl) = 1;
3557 TREE_USED (decl) = 1;
3559 if (current_function_decl)
3561 struct cp_binding_level *b = current_binding_level;
3562 while (b->level_chain->kind != sk_function_parms)
3564 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3565 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3566 LOOKUP_ONLYCONVERTING);
3569 pushdecl_top_level_and_finish (decl, init);
3575 builtin_function_1 (tree decl, tree context, bool is_global)
3577 tree id = DECL_NAME (decl);
3578 const char *name = IDENTIFIER_POINTER (id);
3580 retrofit_lang_decl (decl);
3582 /* All nesting of C++ functions is lexical; there is never a "static
3583 chain" in the sense of GNU C nested functions. */
3584 DECL_NO_STATIC_CHAIN (decl) = 1;
3586 DECL_ARTIFICIAL (decl) = 1;
3587 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3588 SET_DECL_LANGUAGE (decl, lang_c);
3589 /* Runtime library routines are, by definition, available in an
3590 external shared object. */
3591 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3592 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3594 DECL_CONTEXT (decl) = context;
3597 pushdecl_top_level (decl);
3601 /* A function in the user's namespace should have an explicit
3602 declaration before it is used. Mark the built-in function as
3603 anticipated but not actually declared. */
3604 if (name[0] != '_' || name[1] != '_')
3605 DECL_ANTICIPATED (decl) = 1;
3606 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3608 size_t len = strlen (name);
3610 /* Treat __*_chk fortification functions as anticipated as well,
3611 unless they are __builtin_*. */
3612 if (len > strlen ("___chk")
3613 && memcmp (name + len - strlen ("_chk"),
3614 "_chk", strlen ("_chk") + 1) == 0)
3615 DECL_ANTICIPATED (decl) = 1;
3622 cxx_builtin_function (tree decl)
3624 tree id = DECL_NAME (decl);
3625 const char *name = IDENTIFIER_POINTER (id);
3626 /* All builtins that don't begin with an '_' should additionally
3627 go in the 'std' namespace. */
3630 tree decl2 = copy_node(decl);
3631 push_namespace (std_identifier);
3632 builtin_function_1 (decl2, std_node, false);
3636 return builtin_function_1 (decl, NULL_TREE, false);
3639 /* Like cxx_builtin_function, but guarantee the function is added to the global
3640 scope. This is to allow function specific options to add new machine
3641 dependent builtins when the target ISA changes via attribute((target(...)))
3642 which saves space on program startup if the program does not use non-generic
3646 cxx_builtin_function_ext_scope (tree decl)
3649 tree id = DECL_NAME (decl);
3650 const char *name = IDENTIFIER_POINTER (id);
3651 /* All builtins that don't begin with an '_' should additionally
3652 go in the 'std' namespace. */
3655 tree decl2 = copy_node(decl);
3656 push_namespace (std_identifier);
3657 builtin_function_1 (decl2, std_node, true);
3661 return builtin_function_1 (decl, NULL_TREE, true);
3664 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3665 function. Not called directly. */
3668 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3670 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3671 DECL_EXTERNAL (fn) = 1;
3672 TREE_PUBLIC (fn) = 1;
3673 DECL_ARTIFICIAL (fn) = 1;
3674 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3675 SET_DECL_LANGUAGE (fn, lang_c);
3676 /* Runtime library routines are, by definition, available in an
3677 external shared object. */
3678 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3679 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3683 /* Returns the _DECL for a library function with C linkage.
3684 We assume that such functions never throw; if this is incorrect,
3685 callers should unset TREE_NOTHROW. */
3688 build_library_fn (tree name, tree type)
3690 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3691 TREE_NOTHROW (fn) = 1;
3695 /* Returns the _DECL for a library function with C++ linkage. */
3698 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3700 tree fn = build_library_fn_1 (name, operator_code, type);
3701 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3702 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3703 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3707 /* Like build_library_fn, but takes a C string instead of an
3711 build_library_fn_ptr (const char* name, tree type)
3713 return build_library_fn (get_identifier (name), type);
3716 /* Like build_cp_library_fn, but takes a C string instead of an
3720 build_cp_library_fn_ptr (const char* name, tree type)
3722 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3725 /* Like build_library_fn, but also pushes the function so that we will
3726 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3727 may throw exceptions listed in RAISES. */
3730 push_library_fn (tree name, tree type, tree raises)
3735 type = build_exception_variant (type, raises);
3737 fn = build_library_fn (name, type);
3738 pushdecl_top_level (fn);
3742 /* Like build_cp_library_fn, but also pushes the function so that it
3743 will be found by normal lookup. */
3746 push_cp_library_fn (enum tree_code operator_code, tree type)
3748 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3755 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3759 push_void_library_fn (tree name, tree parmtypes)
3761 tree type = build_function_type (void_type_node, parmtypes);
3762 return push_library_fn (name, type, NULL_TREE);
3765 /* Like push_library_fn, but also note that this function throws
3766 and does not return. Used for __throw_foo and the like. */
3769 push_throw_library_fn (tree name, tree type)
3771 tree fn = push_library_fn (name, type, NULL_TREE);
3772 TREE_THIS_VOLATILE (fn) = 1;
3773 TREE_NOTHROW (fn) = 0;
3777 /* When we call finish_struct for an anonymous union, we create
3778 default copy constructors and such. But, an anonymous union
3779 shouldn't have such things; this function undoes the damage to the
3780 anonymous union type T.
3782 (The reason that we create the synthesized methods is that we don't
3783 distinguish `union { int i; }' from `typedef union { int i; } U'.
3784 The first is an anonymous union; the second is just an ordinary
3788 fixup_anonymous_aggr (tree t)
3792 /* Wipe out memory of synthesized methods. */
3793 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3794 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3795 TYPE_HAS_INIT_REF (t) = 0;
3796 TYPE_HAS_CONST_INIT_REF (t) = 0;
3797 TYPE_HAS_ASSIGN_REF (t) = 0;
3798 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3800 /* Splice the implicitly generated functions out of the TYPE_METHODS
3802 q = &TYPE_METHODS (t);
3805 if (DECL_ARTIFICIAL (*q))
3806 *q = TREE_CHAIN (*q);
3808 q = &TREE_CHAIN (*q);
3811 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3812 if (TYPE_METHODS (t))
3814 tree decl = TYPE_MAIN_DECL (t);
3816 if (TREE_CODE (t) != UNION_TYPE)
3817 error_at (DECL_SOURCE_LOCATION (decl),
3818 "an anonymous struct cannot have function members");
3820 error_at (DECL_SOURCE_LOCATION (decl),
3821 "an anonymous union cannot have function members");
3824 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3825 assignment operators (because they cannot have these methods themselves).
3826 For anonymous unions this is already checked because they are not allowed
3827 in any union, otherwise we have to check it. */
3828 if (TREE_CODE (t) != UNION_TYPE)
3832 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3833 if (TREE_CODE (field) == FIELD_DECL)
3835 type = TREE_TYPE (field);
3836 if (CLASS_TYPE_P (type))
3838 if (TYPE_NEEDS_CONSTRUCTING (type))
3839 error ("member %q+#D with constructor not allowed "
3840 "in anonymous aggregate", field);
3841 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3842 error ("member %q+#D with destructor not allowed "
3843 "in anonymous aggregate", field);
3844 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3845 error ("member %q+#D with copy assignment operator "
3846 "not allowed in anonymous aggregate", field);
3852 /* Make sure that a declaration with no declarator is well-formed, i.e.
3853 just declares a tagged type or anonymous union.
3855 Returns the type declared; or NULL_TREE if none. */
3858 check_tag_decl (cp_decl_specifier_seq *declspecs)
3860 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3861 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3862 /* If a class, struct, or enum type is declared by the DECLSPECS
3863 (i.e, if a class-specifier, enum-specifier, or non-typename
3864 elaborated-type-specifier appears in the DECLSPECS),
3865 DECLARED_TYPE is set to the corresponding type. */
3866 tree declared_type = NULL_TREE;
3867 bool error_p = false;
3869 if (declspecs->multiple_types_p)
3870 error ("multiple types in one declaration");
3871 else if (declspecs->redefined_builtin_type)
3873 if (!in_system_header)
3874 permerror (input_location, "redeclaration of C++ built-in type %qT",
3875 declspecs->redefined_builtin_type);
3880 && TYPE_P (declspecs->type)
3881 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3882 && MAYBE_CLASS_TYPE_P (declspecs->type))
3883 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3884 declared_type = declspecs->type;
3885 else if (declspecs->type == error_mark_node)
3887 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3888 permerror (input_location, "declaration does not declare anything");
3889 /* Check for an anonymous union. */
3890 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3891 && TYPE_ANONYMOUS_P (declared_type))
3893 /* 7/3 In a simple-declaration, the optional init-declarator-list
3894 can be omitted only when declaring a class (clause 9) or
3895 enumeration (7.2), that is, when the decl-specifier-seq contains
3896 either a class-specifier, an elaborated-type-specifier with
3897 a class-key (9.1), or an enum-specifier. In these cases and
3898 whenever a class-specifier or enum-specifier is present in the
3899 decl-specifier-seq, the identifiers in these specifiers are among
3900 the names being declared by the declaration (as class-name,
3901 enum-names, or enumerators, depending on the syntax). In such
3902 cases, and except for the declaration of an unnamed bit-field (9.6),
3903 the decl-specifier-seq shall introduce one or more names into the
3904 program, or shall redeclare a name introduced by a previous
3905 declaration. [Example:
3906 enum { }; // ill-formed
3907 typedef class { }; // ill-formed
3911 error ("missing type-name in typedef-declaration");
3914 /* Anonymous unions are objects, so they can have specifiers. */;
3915 SET_ANON_AGGR_TYPE_P (declared_type);
3917 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3918 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3923 if (declspecs->specs[(int)ds_inline]
3924 || declspecs->specs[(int)ds_virtual])
3925 error ("%qs can only be specified for functions",
3926 declspecs->specs[(int)ds_inline]
3927 ? "inline" : "virtual");
3929 && (!current_class_type
3930 || current_scope () != current_class_type))
3931 error ("%<friend%> can only be specified inside a class");
3932 else if (declspecs->specs[(int)ds_explicit])
3933 error ("%<explicit%> can only be specified for constructors");
3934 else if (declspecs->storage_class)
3935 error ("a storage class can only be specified for objects "
3937 else if (declspecs->specs[(int)ds_const]
3938 || declspecs->specs[(int)ds_volatile]
3939 || declspecs->specs[(int)ds_restrict]
3940 || declspecs->specs[(int)ds_thread])
3941 error ("qualifiers can only be specified for objects "
3943 else if (saw_typedef)
3944 warning (0, "%<typedef%> was ignored in this declaration");
3947 return declared_type;
3950 /* Called when a declaration is seen that contains no names to declare.
3951 If its type is a reference to a structure, union or enum inherited
3952 from a containing scope, shadow that tag name for the current scope
3953 with a forward reference.
3954 If its type defines a new named structure or union
3955 or defines an enum, it is valid but we need not do anything here.
3956 Otherwise, it is an error.
3958 C++: may have to grok the declspecs to learn about static,
3959 complain for anonymous unions.
3961 Returns the TYPE declared -- or NULL_TREE if none. */
3964 shadow_tag (cp_decl_specifier_seq *declspecs)
3966 tree t = check_tag_decl (declspecs);
3971 if (declspecs->attributes)
3973 warning (0, "attribute ignored in declaration of %q+#T", t);
3974 warning (0, "attribute for %q+#T must follow the %qs keyword",
3975 t, class_key_or_enum_as_string (t));
3979 if (maybe_process_partial_specialization (t) == error_mark_node)
3982 /* This is where the variables in an anonymous union are
3983 declared. An anonymous union declaration looks like:
3985 because there is no declarator after the union, the parser
3986 sends that declaration here. */
3987 if (ANON_AGGR_TYPE_P (t))
3989 fixup_anonymous_aggr (t);
3991 if (TYPE_FIELDS (t))
3993 tree decl = grokdeclarator (/*declarator=*/NULL,
3994 declspecs, NORMAL, 0, NULL);
3995 finish_anon_union (decl);
4002 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4005 groktypename (cp_decl_specifier_seq *type_specifiers,
4006 const cp_declarator *declarator,
4007 bool is_template_arg)
4011 enum decl_context context
4012 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4013 attrs = type_specifiers->attributes;
4014 type_specifiers->attributes = NULL_TREE;
4015 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4016 if (attrs && type != error_mark_node)
4018 if (CLASS_TYPE_P (type))
4019 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4020 "outside of definition", type);
4021 else if (MAYBE_CLASS_TYPE_P (type))
4022 /* A template type parameter or other dependent type. */
4023 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4024 "type %qT without an associated declaration", type);
4026 cplus_decl_attributes (&type, attrs, 0);
4031 /* Process a DECLARATOR for a function-scope variable declaration,
4032 namespace-scope variable declaration, or function declaration.
4033 (Function definitions go through start_function; class member
4034 declarations appearing in the body of the class go through
4035 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4036 If an error occurs, the error_mark_node is returned instead.
4038 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4039 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4040 for an explicitly defaulted function, or SD_DELETED for an explicitly
4041 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4042 implicitly initialized via a default constructor. ATTRIBUTES and
4043 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4044 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4045 set, the caller is responsible for calling pop_scope. */
4048 start_decl (const cp_declarator *declarator,
4049 cp_decl_specifier_seq *declspecs,
4052 tree prefix_attributes,
4053 tree *pushed_scope_p)
4061 *pushed_scope_p = NULL_TREE;
4063 /* An object declared as __attribute__((deprecated)) suppresses
4064 warnings of uses of other deprecated items. */
4065 if (lookup_attribute ("deprecated", attributes))
4066 deprecated_state = DEPRECATED_SUPPRESS;
4068 attributes = chainon (attributes, prefix_attributes);
4070 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4073 deprecated_state = DEPRECATED_NORMAL;
4075 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4076 || decl == error_mark_node)
4077 return error_mark_node;
4079 type = TREE_TYPE (decl);
4081 context = DECL_CONTEXT (decl);
4085 *pushed_scope_p = push_scope (context);
4087 /* We are only interested in class contexts, later. */
4088 if (TREE_CODE (context) == NAMESPACE_DECL)
4089 context = NULL_TREE;
4093 /* Is it valid for this decl to have an initializer at all?
4094 If not, set INITIALIZED to zero, which will indirectly
4095 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4096 switch (TREE_CODE (decl))
4099 error ("typedef %qD is initialized (use decltype instead)", decl);
4100 return error_mark_node;
4103 if (initialized == SD_DELETED)
4104 /* We'll handle the rest of the semantics later, but we need to
4105 set this now so it's visible to duplicate_decls. */
4106 DECL_DELETED_FN (decl) = 1;
4115 if (! toplevel_bindings_p ()
4116 && DECL_EXTERNAL (decl))
4117 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4119 DECL_EXTERNAL (decl) = 0;
4120 if (toplevel_bindings_p ())
4121 TREE_STATIC (decl) = 1;
4124 /* If this is a typedef that names the class for linkage purposes
4125 (7.1.3p8), apply any attributes directly to the type. */
4126 if (TREE_CODE (decl) == TYPE_DECL
4127 && TAGGED_TYPE_P (TREE_TYPE (decl))
4128 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4129 flags = ATTR_FLAG_TYPE_IN_PLACE;
4133 /* Set attributes here so if duplicate decl, will have proper attributes. */
4134 cplus_decl_attributes (&decl, attributes, flags);
4136 /* Dllimported symbols cannot be defined. Static data members (which
4137 can be initialized in-class and dllimported) go through grokfield,
4138 not here, so we don't need to exclude those decls when checking for
4140 if (initialized && DECL_DLLIMPORT_P (decl))
4142 error ("definition of %q#D is marked %<dllimport%>", decl);
4143 DECL_DLLIMPORT_P (decl) = 0;
4146 /* If #pragma weak was used, mark the decl weak now. */
4147 maybe_apply_pragma_weak (decl);
4149 if (TREE_CODE (decl) == FUNCTION_DECL
4150 && DECL_DECLARED_INLINE_P (decl)
4151 && DECL_UNINLINABLE (decl)
4152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4153 warning (0, "inline function %q+D given attribute noinline", decl);
4155 if (context && COMPLETE_TYPE_P (complete_type (context)))
4157 if (TREE_CODE (decl) == VAR_DECL)
4159 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4160 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4161 error ("%q#D is not a static member of %q#T", decl, context);
4164 if (DECL_CONTEXT (field) != context)
4166 if (!same_type_p (DECL_CONTEXT (field), context))
4167 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4168 "to be defined as %<%T::%D%>",
4169 DECL_CONTEXT (field), DECL_NAME (decl),
4170 context, DECL_NAME (decl));
4171 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4173 if (processing_specialization
4174 && template_class_depth (context) == 0
4175 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4176 error ("template header not allowed in member definition "
4177 "of explicitly specialized class");
4178 /* Static data member are tricky; an in-class initialization
4179 still doesn't provide a definition, so the in-class
4180 declaration will have DECL_EXTERNAL set, but will have an
4181 initialization. Thus, duplicate_decls won't warn
4182 about this situation, and so we check here. */
4183 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4184 error ("duplicate initialization of %qD", decl);
4185 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4191 tree field = check_classfn (context, decl,
4192 (processing_template_decl
4193 > template_class_depth (context))
4194 ? current_template_parms
4196 if (field && field != error_mark_node
4197 && duplicate_decls (decl, field,
4198 /*newdecl_is_friend=*/false))
4202 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4203 DECL_IN_AGGR_P (decl) = 0;
4204 /* Do not mark DECL as an explicit specialization if it was not
4205 already marked as an instantiation; a declaration should
4206 never be marked as a specialization unless we know what
4207 template is being specialized. */
4208 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4210 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4212 /* [temp.expl.spec] An explicit specialization of a static data
4213 member of a template is a definition if the declaration
4214 includes an initializer; otherwise, it is a declaration.
4216 We check for processing_specialization so this only applies
4217 to the new specialization syntax. */
4218 if (!initialized && processing_specialization)
4219 DECL_EXTERNAL (decl) = 1;
4222 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4223 permerror (input_location, "declaration of %q#D outside of class is not definition",
4227 was_public = TREE_PUBLIC (decl);
4229 /* Enter this declaration into the symbol table. */
4230 decl = maybe_push_decl (decl);
4232 if (processing_template_decl)
4233 decl = push_template_decl (decl);
4234 if (decl == error_mark_node)
4235 return error_mark_node;
4237 /* Tell the back end to use or not use .common as appropriate. If we say
4238 -fconserve-space, we want this to save .data space, at the expense of
4239 wrong semantics. If we say -fno-conserve-space, we want this to
4240 produce errors about redefs; to do this we force variables into the
4242 if (flag_conserve_space
4243 && TREE_CODE (decl) == VAR_DECL
4244 && TREE_PUBLIC (decl)
4245 && !DECL_THREAD_LOCAL_P (decl)
4246 && !have_global_bss_p ())
4247 DECL_COMMON (decl) = 1;
4249 if (TREE_CODE (decl) == VAR_DECL
4250 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4251 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4253 /* This is a const variable with implicit 'static'. Set
4254 DECL_THIS_STATIC so we can tell it from variables that are
4255 !TREE_PUBLIC because of the anonymous namespace. */
4256 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4257 DECL_THIS_STATIC (decl) = 1;
4260 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4261 start_decl_1 (decl, initialized);
4266 /* Process the declaration of a variable DECL. INITIALIZED is true
4267 iff DECL is explicitly initialized. (INITIALIZED is false if the
4268 variable is initialized via an implicitly-called constructor.)
4269 This function must be called for ordinary variables (including, for
4270 example, implicit instantiations of templates), but must not be
4271 called for template declarations. */
4274 start_decl_1 (tree decl, bool initialized)
4278 bool aggregate_definition_p;
4280 gcc_assert (!processing_template_decl);
4282 if (error_operand_p (decl))
4285 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4287 type = TREE_TYPE (decl);
4288 complete_p = COMPLETE_TYPE_P (type);
4289 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4291 /* If an explicit initializer is present, or if this is a definition
4292 of an aggregate, then we need a complete type at this point.
4293 (Scalars are always complete types, so there is nothing to
4294 check.) This code just sets COMPLETE_P; errors (if necessary)
4295 are issued below. */
4296 if ((initialized || aggregate_definition_p)
4298 && COMPLETE_TYPE_P (complete_type (type)))
4301 /* We will not yet have set TREE_READONLY on DECL if the type
4302 was "const", but incomplete, before this point. But, now, we
4303 have a complete type, so we can try again. */
4304 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4308 /* Is it valid for this decl to have an initializer at all? */
4310 /* Don't allow initializations for incomplete types except for
4311 arrays which might be completed by the initialization. */
4313 ; /* A complete type is ok. */
4314 else if (type_uses_auto (type))
4315 ; /* An auto type is ok. */
4316 else if (TREE_CODE (type) != ARRAY_TYPE)
4318 error ("variable %q#D has initializer but incomplete type", decl);
4319 type = TREE_TYPE (decl) = error_mark_node;
4321 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4323 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4324 error ("elements of array %q#D have incomplete type", decl);
4325 /* else we already gave an error in start_decl. */
4328 else if (aggregate_definition_p && !complete_p)
4330 if (type_uses_auto (type))
4331 error ("declaration of %q#D has no initializer", decl);
4333 error ("aggregate %q#D has incomplete type and cannot be defined",
4335 /* Change the type so that assemble_variable will give
4336 DECL an rtl we can live with: (mem (const_int 0)). */
4337 type = TREE_TYPE (decl) = error_mark_node;
4340 /* Create a new scope to hold this declaration if necessary.
4341 Whether or not a new scope is necessary cannot be determined
4342 until after the type has been completed; if the type is a
4343 specialization of a class template it is not until after
4344 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4345 will be set correctly. */
4346 maybe_push_cleanup_level (type);
4349 /* Handle initialization of references. DECL, TYPE, and INIT have the
4350 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4351 but will be set to a new CLEANUP_STMT if a temporary is created
4352 that must be destroyed subsequently.
4354 Returns an initializer expression to use to initialize DECL, or
4355 NULL if the initialization can be performed statically.
4357 Quotes on semantics can be found in ARM 8.4.3. */
4360 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4364 if (init == NULL_TREE)
4366 if ((DECL_LANG_SPECIFIC (decl) == 0
4367 || DECL_IN_AGGR_P (decl) == 0)
4368 && ! DECL_THIS_EXTERN (decl))
4369 error ("%qD declared as reference but not initialized", decl);
4373 if (TREE_CODE (init) == TREE_LIST)
4374 init = build_x_compound_expr_from_list (init, "initializer");
4376 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4377 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4378 /* Note: default conversion is only called in very special cases. */
4379 init = decay_conversion (init);
4381 /* Convert INIT to the reference type TYPE. This may involve the
4382 creation of a temporary, whose lifetime must be the same as that
4383 of the reference. If so, a DECL_EXPR for the temporary will be
4384 added just after the DECL_EXPR for DECL. That's why we don't set
4385 DECL_INITIAL for local references (instead assigning to them
4386 explicitly); we need to allow the temporary to be initialized
4388 tmp = initialize_reference (type, init, decl, cleanup);
4390 if (tmp == error_mark_node)
4392 else if (tmp == NULL_TREE)
4394 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4398 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4401 DECL_INITIAL (decl) = tmp;
4406 /* Subroutine of check_initializer. We're initializing a DECL of
4407 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4408 extend the lifetime of the underlying array to match that of the decl,
4409 just like for reference initialization. CLEANUP is as for
4410 grok_reference_init. */
4413 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4415 tree aggr_init, array, arrtype;
4416 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4417 aggr_init = TARGET_EXPR_INITIAL (init);
4418 init = build2 (INIT_EXPR, type, decl, init);
4420 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4421 arrtype = TREE_TYPE (array);
4423 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4424 array = TREE_OPERAND (array, 0);
4425 /* If the array is constant, finish_compound_literal already made it a
4426 static variable and we don't need to do anything here. */
4427 if (decl && TREE_CODE (array) == TARGET_EXPR)
4430 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4431 var = build_address (var);
4432 var = convert (arrtype, var);
4433 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4434 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4439 /* Designated initializers in arrays are not supported in GNU C++.
4440 The parser cannot detect this error since it does not know whether
4441 a given brace-enclosed initializer is for a class type or for an
4442 array. This function checks that CE does not use a designated
4443 initializer. If it does, an error is issued. Returns true if CE
4444 is valid, i.e., does not have a designated initializer. */
4447 check_array_designated_initializer (const constructor_elt *ce)
4449 /* Designated initializers for array elements are not supported. */
4452 /* The parser only allows identifiers as designated
4454 if (ce->index == error_mark_node)
4455 error ("name used in a GNU-style designated "
4456 "initializer for an array");
4459 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4460 error ("name %qD used in a GNU-style designated "
4461 "initializer for an array", ce->index);
4469 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4470 array until we finish parsing the initializer. If that's the
4471 situation we're in, update DECL accordingly. */
4474 maybe_deduce_size_from_array_init (tree decl, tree init)
4476 tree type = TREE_TYPE (decl);
4478 if (TREE_CODE (type) == ARRAY_TYPE
4479 && TYPE_DOMAIN (type) == NULL_TREE
4480 && TREE_CODE (decl) != TYPE_DECL)
4482 /* do_default is really a C-ism to deal with tentative definitions.
4483 But let's leave it here to ease the eventual merge. */
4484 int do_default = !DECL_EXTERNAL (decl);
4485 tree initializer = init ? init : DECL_INITIAL (decl);
4488 /* Check that there are no designated initializers in INIT, as
4489 those are not supported in GNU C++, and as the middle-end
4490 will crash if presented with a non-numeric designated
4492 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4494 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4495 constructor_elt *ce;
4498 VEC_iterate (constructor_elt, v, i, ce);
4500 if (!check_array_designated_initializer (ce))
4506 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4510 error ("initializer fails to determine size of %qD", decl);
4511 TREE_TYPE (decl) = error_mark_node;
4513 else if (failure == 2)
4517 error ("array size missing in %qD", decl);
4518 TREE_TYPE (decl) = error_mark_node;
4520 /* If a `static' var's size isn't known, make it extern as
4521 well as static, so it does not get allocated. If it's not
4522 `static', then don't mark it extern; finish_incomplete_decl
4523 will give it a default size and it will get allocated. */
4524 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4525 DECL_EXTERNAL (decl) = 1;
4527 else if (failure == 3)
4529 error ("zero-size array %qD", decl);
4530 TREE_TYPE (decl) = error_mark_node;
4534 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4536 relayout_decl (decl);
4540 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4541 any appropriate error messages regarding the layout. */
4544 layout_var_decl (tree decl)
4548 type = TREE_TYPE (decl);
4549 if (type == error_mark_node)
4552 /* If we haven't already layed out this declaration, do so now.
4553 Note that we must not call complete type for an external object
4554 because it's type might involve templates that we are not
4555 supposed to instantiate yet. (And it's perfectly valid to say
4556 `extern X x' for some incomplete type `X'.) */
4557 if (!DECL_EXTERNAL (decl))
4558 complete_type (type);
4559 if (!DECL_SIZE (decl)
4560 && TREE_TYPE (decl) != error_mark_node
4561 && (COMPLETE_TYPE_P (type)
4562 || (TREE_CODE (type) == ARRAY_TYPE
4563 && !TYPE_DOMAIN (type)
4564 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4565 layout_decl (decl, 0);
4567 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4569 /* An automatic variable with an incomplete type: that is an error.
4570 Don't talk about array types here, since we took care of that
4571 message in grokdeclarator. */
4572 error ("storage size of %qD isn't known", decl);
4573 TREE_TYPE (decl) = error_mark_node;
4576 /* Keep this code around in case we later want to control debug info
4577 based on whether a type is "used". (jason 1999-11-11) */
4579 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4580 /* Let debugger know it should output info for this type. */
4581 note_debug_info_needed (ttype);
4583 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4584 note_debug_info_needed (DECL_CONTEXT (decl));
4587 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4588 && DECL_SIZE (decl) != NULL_TREE
4589 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4591 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4592 constant_expression_warning (DECL_SIZE (decl));
4595 error ("storage size of %qD isn't constant", decl);
4596 TREE_TYPE (decl) = error_mark_node;
4601 /* If a local static variable is declared in an inline function, or if
4602 we have a weak definition, we must endeavor to create only one
4603 instance of the variable at link-time. */
4606 maybe_commonize_var (tree decl)
4608 /* Static data in a function with comdat linkage also has comdat
4610 if (TREE_STATIC (decl)
4611 /* Don't mess with __FUNCTION__. */
4612 && ! DECL_ARTIFICIAL (decl)
4613 && DECL_FUNCTION_SCOPE_P (decl)
4614 /* Unfortunately, import_export_decl has not always been called
4615 before the function is processed, so we cannot simply check
4617 && (DECL_COMDAT (DECL_CONTEXT (decl))
4618 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4619 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4620 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4624 /* With weak symbols, we simply make the variable COMDAT;
4625 that will cause copies in multiple translations units to
4627 comdat_linkage (decl);
4631 if (DECL_INITIAL (decl) == NULL_TREE
4632 || DECL_INITIAL (decl) == error_mark_node)
4634 /* Without weak symbols, we can use COMMON to merge
4635 uninitialized variables. */
4636 TREE_PUBLIC (decl) = 1;
4637 DECL_COMMON (decl) = 1;
4641 /* While for initialized variables, we must use internal
4642 linkage -- which means that multiple copies will not
4644 TREE_PUBLIC (decl) = 0;
4645 DECL_COMMON (decl) = 0;
4646 warning_at (input_location, 0,
4647 "sorry: semantics of inline function static "
4648 "data %q+#D are wrong (you'll wind up "
4649 "with multiple copies)", decl);
4650 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4651 " you can work around this by removing "
4656 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4657 /* Set it up again; we might have set DECL_INITIAL since the last
4659 comdat_linkage (decl);
4662 /* Issue an error message if DECL is an uninitialized const variable. */
4665 check_for_uninitialized_const_var (tree decl)
4667 tree type = TREE_TYPE (decl);
4669 /* ``Unless explicitly declared extern, a const object does not have
4670 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4672 if (TREE_CODE (decl) == VAR_DECL
4673 && TREE_CODE (type) != REFERENCE_TYPE
4674 && CP_TYPE_CONST_P (type)
4675 && !TYPE_NEEDS_CONSTRUCTING (type)
4676 && !DECL_INITIAL (decl))
4677 error ("uninitialized const %qD", decl);
4681 /* Structure holding the current initializer being processed by reshape_init.
4682 CUR is a pointer to the current element being processed, END is a pointer
4683 after the last element present in the initializer. */
4684 typedef struct reshape_iterator_t
4686 constructor_elt *cur;
4687 constructor_elt *end;
4690 static tree reshape_init_r (tree, reshape_iter *, bool);
4692 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4693 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4694 initialized. If there are no more such fields, the return value
4698 next_initializable_field (tree field)
4701 && (TREE_CODE (field) != FIELD_DECL
4702 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4703 || DECL_ARTIFICIAL (field)))
4704 field = TREE_CHAIN (field);
4709 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4710 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4711 INTEGER_CST representing the size of the array minus one (the maximum index),
4712 or NULL_TREE if the array was declared without specifying the size. D is
4713 the iterator within the constructor. */
4716 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4719 bool sized_array_p = (max_index != NULL_TREE);
4720 unsigned HOST_WIDE_INT max_index_cst = 0;
4721 unsigned HOST_WIDE_INT index;
4723 /* The initializer for an array is always a CONSTRUCTOR. */
4724 new_init = build_constructor (init_list_type_node, NULL);
4728 /* Minus 1 is used for zero sized arrays. */
4729 if (integer_all_onesp (max_index))
4732 if (host_integerp (max_index, 1))
4733 max_index_cst = tree_low_cst (max_index, 1);
4734 /* sizetype is sign extended, not zero extended. */
4736 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4740 /* Loop until there are no more initializers. */
4742 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4747 check_array_designated_initializer (d->cur);
4748 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4749 if (elt_init == error_mark_node)
4750 return error_mark_node;
4751 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4757 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4758 Parameters are the same of reshape_init_r. */
4761 reshape_init_array (tree type, reshape_iter *d)
4763 tree max_index = NULL_TREE;
4765 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4767 if (TYPE_DOMAIN (type))
4768 max_index = array_type_nelts (type);
4770 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4773 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4774 Parameters are the same of reshape_init_r. */
4777 reshape_init_vector (tree type, reshape_iter *d)
4779 tree max_index = NULL_TREE;
4782 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4784 if (COMPOUND_LITERAL_P (d->cur->value))
4786 tree value = d->cur->value;
4787 if (!same_type_p (TREE_TYPE (value), type))
4789 error ("invalid type %qT as initializer for a vector of type %qT",
4790 TREE_TYPE (d->cur->value), type);
4791 value = error_mark_node;
4797 /* For a vector, the representation type is a struct
4798 containing a single member which is an array of the
4799 appropriate size. */
4800 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4801 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4802 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4804 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4807 /* Subroutine of reshape_init_r, processes the initializers for classes
4808 or union. Parameters are the same of reshape_init_r. */
4811 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4816 gcc_assert (CLASS_TYPE_P (type));
4818 /* The initializer for a class is always a CONSTRUCTOR. */
4819 new_init = build_constructor (init_list_type_node, NULL);
4820 field = next_initializable_field (TYPE_FIELDS (type));
4826 An initializer for an aggregate member that is an
4827 empty class shall have the form of an empty
4828 initializer-list {}. */
4829 if (!first_initializer_p)
4831 error ("initializer for %qT must be brace-enclosed", type);
4832 return error_mark_node;
4837 /* Loop through the initializable fields, gathering initializers. */
4838 while (d->cur != d->end)
4842 /* Handle designated initializers, as an extension. */
4845 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4847 if (!field || TREE_CODE (field) != FIELD_DECL)
4849 error ("%qT has no non-static data member named %qD", type,
4851 return error_mark_node;
4855 /* If we processed all the member of the class, we are done. */
4859 field_init = reshape_init_r (TREE_TYPE (field), d,
4860 /*first_initializer_p=*/false);
4861 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4865 When a union is initialized with a brace-enclosed
4866 initializer, the braces shall only contain an
4867 initializer for the first member of the union. */
4868 if (TREE_CODE (type) == UNION_TYPE)
4871 field = next_initializable_field (TREE_CHAIN (field));
4877 /* Subroutine of reshape_init, which processes a single initializer (part of
4878 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4879 iterator within the CONSTRUCTOR which points to the initializer to process.
4880 FIRST_INITIALIZER_P is true if this is the first initializer of the
4881 outermost CONSTRUCTOR node. */
4884 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4886 tree init = d->cur->value;
4888 if (error_operand_p (init))
4889 return error_mark_node;
4891 /* A non-aggregate type is always initialized with a single
4893 if (!CP_AGGREGATE_TYPE_P (type))
4895 /* It is invalid to initialize a non-aggregate type with a
4896 brace-enclosed initializer before C++0x.
4897 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4898 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4899 a CONSTRUCTOR (with a record type). */
4900 if (TREE_CODE (init) == CONSTRUCTOR
4901 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4903 if (SCALAR_TYPE_P (type))
4905 error ("braces around scalar initializer for type %qT", type);
4906 init = error_mark_node;
4909 maybe_warn_cpp0x ("extended initializer lists");
4918 All implicit type conversions (clause _conv_) are considered when
4919 initializing the aggregate member with an initializer from an
4920 initializer-list. If the initializer can initialize a member,
4921 the member is initialized. Otherwise, if the member is itself a
4922 non-empty subaggregate, brace elision is assumed and the
4923 initializer is considered for the initialization of the first
4924 member of the subaggregate. */
4925 if (TREE_CODE (init) != CONSTRUCTOR
4926 /* But don't try this for the first initializer, since that would be
4927 looking through the outermost braces; A a2 = { a1 }; is not a
4928 valid aggregate initialization. */
4929 && !first_initializer_p
4930 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4936 /* [dcl.init.string]
4938 A char array (whether plain char, signed char, or unsigned char)
4939 can be initialized by a string-literal (optionally enclosed in
4940 braces); a wchar_t array can be initialized by a wide
4941 string-literal (optionally enclosed in braces). */
4942 if (TREE_CODE (type) == ARRAY_TYPE
4943 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4945 tree str_init = init;
4947 /* Strip one level of braces if and only if they enclose a single
4948 element (as allowed by [dcl.init.string]). */
4949 if (!first_initializer_p
4950 && TREE_CODE (str_init) == CONSTRUCTOR
4951 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4953 str_init = VEC_index (constructor_elt,
4954 CONSTRUCTOR_ELTS (str_init), 0)->value;
4957 /* If it's a string literal, then it's the initializer for the array
4958 as a whole. Otherwise, continue with normal initialization for
4959 array types (one value per array element). */
4960 if (TREE_CODE (str_init) == STRING_CST)
4967 /* The following cases are about aggregates. If we are not within a full
4968 initializer already, and there is not a CONSTRUCTOR, it means that there
4969 is a missing set of braces (that is, we are processing the case for
4970 which reshape_init exists). */
4971 if (!first_initializer_p)
4973 if (TREE_CODE (init) == CONSTRUCTOR)
4975 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4976 /* There is no need to reshape pointer-to-member function
4977 initializers, as they are always constructed correctly
4978 by the front end. */
4980 else if (COMPOUND_LITERAL_P (init))
4981 /* For a nested compound literal, there is no need to reshape since
4982 brace elision is not allowed. Even if we decided to allow it,
4983 we should add a call to reshape_init in finish_compound_literal,
4984 before calling digest_init, so changing this code would still
4985 not be necessary. */
4986 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4990 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4991 return reshape_init (type, init);
4995 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4999 /* Dispatch to specialized routines. */
5000 if (CLASS_TYPE_P (type))
5001 return reshape_init_class (type, d, first_initializer_p);
5002 else if (TREE_CODE (type) == ARRAY_TYPE)
5003 return reshape_init_array (type, d);
5004 else if (TREE_CODE (type) == VECTOR_TYPE)
5005 return reshape_init_vector (type, d);
5010 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5011 brace-enclosed aggregate initializer.
5013 INIT is the CONSTRUCTOR containing the list of initializers describing
5014 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5015 It may not presently match the shape of the TYPE; for example:
5017 struct S { int a; int b; };
5018 struct S a[] = { 1, 2, 3, 4 };
5020 Here INIT will hold a VEC of four elements, rather than a
5021 VEC of two elements, each itself a VEC of two elements. This
5022 routine transforms INIT from the former form into the latter. The
5023 revised CONSTRUCTOR node is returned. */
5026 reshape_init (tree type, tree init)
5028 VEC(constructor_elt, gc) *v;
5032 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5034 v = CONSTRUCTOR_ELTS (init);
5036 /* An empty constructor does not need reshaping, and it is always a valid
5038 if (VEC_empty (constructor_elt, v))
5041 /* Recurse on this CONSTRUCTOR. */
5042 d.cur = VEC_index (constructor_elt, v, 0);
5043 d.end = d.cur + VEC_length (constructor_elt, v);
5045 new_init = reshape_init_r (type, &d, true);
5046 if (new_init == error_mark_node)
5047 return error_mark_node;
5049 /* Make sure all the element of the constructor were used. Otherwise,
5050 issue an error about exceeding initializers. */
5052 error ("too many initializers for %qT", type);
5057 /* Verify array initializer. Returns true if errors have been reported. */
5060 check_array_initializer (tree decl, tree type, tree init)
5062 tree element_type = TREE_TYPE (type);
5064 /* The array type itself need not be complete, because the
5065 initializer may tell us how many elements are in the array.
5066 But, the elements of the array must be complete. */
5067 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5070 error ("elements of array %q#D have incomplete type", decl);
5072 error ("elements of array %q#T have incomplete type", type);
5075 /* It is not valid to initialize a VLA. */
5077 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5078 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5081 error ("variable-sized object %qD may not be initialized", decl);
5083 error ("variable-sized compound literal");
5089 /* Subroutine of check_initializer; args are passed down from that function.
5090 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5093 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5096 int saved_stmts_are_full_exprs_p = 0;
5097 if (building_stmt_tree ())
5099 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5100 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5102 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5103 if (building_stmt_tree ())
5104 current_stmt_tree ()->stmts_are_full_exprs_p =
5105 saved_stmts_are_full_exprs_p;
5109 /* Verify INIT (the initializer for DECL), and record the
5110 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5111 grok_reference_init.
5113 If the return value is non-NULL, it is an expression that must be
5114 evaluated dynamically to initialize DECL. */
5117 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5119 tree type = TREE_TYPE (decl);
5120 tree init_code = NULL;
5122 /* Things that are going to be initialized need to have complete
5124 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5126 if (type == error_mark_node)
5127 /* We will have already complained. */
5130 if (TREE_CODE (type) == ARRAY_TYPE)
5132 if (check_array_initializer (decl, type, init))
5135 else if (!COMPLETE_TYPE_P (type))
5137 error ("%qD has incomplete type", decl);
5138 TREE_TYPE (decl) = error_mark_node;
5142 /* There is no way to make a variable-sized class type in GNU C++. */
5143 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5145 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5147 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5148 if (SCALAR_TYPE_P (type))
5152 maybe_warn_cpp0x ("extended initializer lists");
5153 init = build_zero_init (type, NULL_TREE, false);
5155 else if (init_len != 1)
5157 error ("scalar object %qD requires one element in initializer",
5159 TREE_TYPE (decl) = error_mark_node;
5165 if (TREE_CODE (decl) == CONST_DECL)
5167 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5169 DECL_INITIAL (decl) = init;
5171 gcc_assert (init != NULL_TREE);
5174 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5175 init = grok_reference_init (decl, type, init, cleanup);
5178 /* Do not reshape constructors of vectors (they don't need to be
5180 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5182 if (is_std_init_list (type))
5183 return build_init_list_var_init (decl, type, init, cleanup);
5184 else if (TYPE_NON_AGGREGATE_CLASS (type))
5186 /* Don't reshape if the class has constructors. */
5187 if (cxx_dialect == cxx98)
5188 error ("in C++98 %qD must be initialized by constructor, "
5191 init = build_tree_list (NULL_TREE, init);
5193 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5195 error ("opaque vector types cannot be initialized");
5196 init = error_mark_node;
5199 init = reshape_init (type, init);
5202 /* If DECL has an array type without a specific bound, deduce the
5203 array size from the initializer. */
5204 maybe_deduce_size_from_array_init (decl, init);
5205 type = TREE_TYPE (decl);
5206 if (type == error_mark_node)
5209 if (TYPE_NEEDS_CONSTRUCTING (type)
5210 || (CLASS_TYPE_P (type)
5211 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5212 return build_aggr_init_full_exprs (decl, init, flags);
5213 else if (TREE_CODE (init) != TREE_VEC)
5215 init_code = store_init_value (decl, init, flags);
5216 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5217 && DECL_INITIAL (decl)
5218 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5219 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5220 warning (0, "array %qD initialized by parenthesized string literal %qE",
5221 decl, DECL_INITIAL (decl));
5225 else if (DECL_EXTERNAL (decl))
5227 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5228 return build_aggr_init_full_exprs (decl, init, flags);
5229 else if (MAYBE_CLASS_TYPE_P (type))
5231 tree core_type = strip_array_types (type);
5233 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5234 error ("structure %qD with uninitialized const members", decl);
5235 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5236 error ("structure %qD with uninitialized reference members", decl);
5238 check_for_uninitialized_const_var (decl);
5241 check_for_uninitialized_const_var (decl);
5243 if (init && init != error_mark_node)
5244 init_code = build2 (INIT_EXPR, type, decl, init);
5249 /* If DECL is not a local variable, give it RTL. */
5252 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5254 int toplev = toplevel_bindings_p ();
5256 const char *filename;
5258 /* Set the DECL_ASSEMBLER_NAME for the object. */
5261 /* The `register' keyword, when used together with an
5262 asm-specification, indicates that the variable should be
5263 placed in a particular register. */
5264 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5266 set_user_assembler_name (decl, asmspec);
5267 DECL_HARD_REGISTER (decl) = 1;
5271 if (TREE_CODE (decl) == FUNCTION_DECL
5272 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5273 set_builtin_user_assembler_name (decl, asmspec);
5274 set_user_assembler_name (decl, asmspec);
5278 /* Handle non-variables up front. */
5279 if (TREE_CODE (decl) != VAR_DECL)
5281 rest_of_decl_compilation (decl, toplev, at_eof);
5285 /* If we see a class member here, it should be a static data
5287 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5289 gcc_assert (TREE_STATIC (decl));
5290 /* An in-class declaration of a static data member should be
5291 external; it is only a declaration, and not a definition. */
5292 if (init == NULL_TREE)
5293 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5296 /* We don't create any RTL for local variables. */
5297 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5300 /* We defer emission of local statics until the corresponding
5301 DECL_EXPR is expanded. */
5302 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5304 /* We try to defer namespace-scope static constants so that they are
5305 not emitted into the object file unnecessarily. */
5306 filename = input_filename;
5307 if (!DECL_VIRTUAL_P (decl)
5308 && TREE_READONLY (decl)
5309 && DECL_INITIAL (decl) != NULL_TREE
5310 && DECL_INITIAL (decl) != error_mark_node
5312 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5314 && !TREE_PUBLIC (decl))
5316 /* Fool with the linkage of static consts according to #pragma
5318 struct c_fileinfo *finfo = get_fileinfo (filename);
5319 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5321 TREE_PUBLIC (decl) = 1;
5322 DECL_EXTERNAL (decl) = finfo->interface_only;
5327 /* Likewise for template instantiations. */
5328 else if (DECL_LANG_SPECIFIC (decl)
5329 && DECL_IMPLICIT_INSTANTIATION (decl))
5332 /* If we're not deferring, go ahead and assemble the variable. */
5334 rest_of_decl_compilation (decl, toplev, at_eof);
5337 /* walk_tree helper for wrap_temporary_cleanups, below. */
5340 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5342 if (TYPE_P (*stmt_p))
5348 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5350 tree guard = (tree)data;
5351 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5353 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5354 /* Tell honor_protect_cleanup_actions to handle this as a separate
5356 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5358 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5364 /* We're initializing a local variable which has a cleanup GUARD. If there
5365 are any temporaries used in the initializer INIT of this variable, we
5366 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5367 variable will be cleaned up properly if one of them throws.
5369 Unfortunately, there's no way to express this properly in terms of
5370 nesting, as the regions for the temporaries overlap the region for the
5371 variable itself; if there are two temporaries, the variable needs to be
5372 the first thing destroyed if either of them throws. However, we only
5373 want to run the variable's cleanup if it actually got constructed. So
5374 we need to guard the temporary cleanups with the variable's cleanup if
5375 they are run on the normal path, but not if they are run on the
5376 exceptional path. We implement this by telling
5377 honor_protect_cleanup_actions to strip the variable cleanup from the
5378 exceptional path. */
5381 wrap_temporary_cleanups (tree init, tree guard)
5383 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5386 /* Generate code to initialize DECL (a local variable). */
5389 initialize_local_var (tree decl, tree init)
5391 tree type = TREE_TYPE (decl);
5395 gcc_assert (TREE_CODE (decl) == VAR_DECL
5396 || TREE_CODE (decl) == RESULT_DECL);
5397 gcc_assert (!TREE_STATIC (decl));
5399 if (DECL_SIZE (decl) == NULL_TREE)
5401 /* If we used it already as memory, it must stay in memory. */
5402 DECL_INITIAL (decl) = NULL_TREE;
5403 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5407 if (type == error_mark_node)
5410 /* Compute and store the initial value. */
5411 already_used = TREE_USED (decl) || TREE_USED (type);
5413 /* Generate a cleanup, if necessary. */
5414 cleanup = cxx_maybe_build_cleanup (decl);
5416 /* Perform the initialization. */
5419 int saved_stmts_are_full_exprs_p;
5421 /* If we're only initializing a single object, guard the destructors
5422 of any temporaries used in its initializer with its destructor.
5423 This isn't right for arrays because each element initialization is
5424 a full-expression. */
5425 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5426 wrap_temporary_cleanups (init, cleanup);
5428 gcc_assert (building_stmt_tree ());
5429 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5430 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5431 finish_expr_stmt (init);
5432 current_stmt_tree ()->stmts_are_full_exprs_p =
5433 saved_stmts_are_full_exprs_p;
5436 /* Set this to 0 so we can tell whether an aggregate which was
5437 initialized was ever used. Don't do this if it has a
5438 destructor, so we don't complain about the 'resource
5439 allocation is initialization' idiom. Now set
5440 attribute((unused)) on types so decls of that type will be
5441 marked used. (see TREE_USED, above.) */
5442 if (TYPE_NEEDS_CONSTRUCTING (type)
5444 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5445 && DECL_NAME (decl))
5446 TREE_USED (decl) = 0;
5447 else if (already_used)
5448 TREE_USED (decl) = 1;
5451 finish_decl_cleanup (decl, cleanup);
5454 /* DECL is a VAR_DECL for a compiler-generated variable with static
5455 storage duration (like a virtual table) whose initializer is a
5456 compile-time constant. INIT must be either a TREE_LIST of values,
5457 or a CONSTRUCTOR. Initialize the variable and provide it to the
5461 initialize_artificial_var (tree decl, tree init)
5463 gcc_assert (DECL_ARTIFICIAL (decl));
5464 if (TREE_CODE (init) == TREE_LIST)
5465 init = build_constructor_from_list (TREE_TYPE (decl), init);
5466 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5467 DECL_INITIAL (decl) = init;
5468 DECL_INITIALIZED_P (decl) = 1;
5469 determine_visibility (decl);
5470 layout_var_decl (decl);
5471 maybe_commonize_var (decl);
5472 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5475 /* INIT is the initializer for a variable, as represented by the
5476 parser. Returns true iff INIT is value-dependent. */
5479 value_dependent_init_p (tree init)
5481 if (TREE_CODE (init) == TREE_LIST)
5482 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5483 return any_value_dependent_elements_p (init);
5484 else if (TREE_CODE (init) == CONSTRUCTOR)
5485 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5487 VEC(constructor_elt, gc) *elts;
5491 elts = CONSTRUCTOR_ELTS (init);
5492 nelts = VEC_length (constructor_elt, elts);
5493 for (i = 0; i < nelts; ++i)
5494 if (value_dependent_init_p (VEC_index (constructor_elt,
5499 /* It must be a simple expression, e.g., int i = 3; */
5500 return value_dependent_expression_p (init);
5505 /* Finish processing of a declaration;
5506 install its line number and initial value.
5507 If the length of an array type is not known before,
5508 it must be determined now, from the initial value, or it is an error.
5510 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5511 true, then INIT is an integral constant expression.
5513 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5514 if the (init) syntax was used. */
5517 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5518 tree asmspec_tree, int flags)
5522 const char *asmspec = NULL;
5523 int was_readonly = 0;
5524 bool var_definition_p = false;
5525 int saved_processing_template_decl;
5528 if (decl == error_mark_node)
5533 error ("assignment (not initialization) in declaration");
5537 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5538 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5539 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5541 type = TREE_TYPE (decl);
5542 if (type == error_mark_node)
5545 /* Assume no cleanup is required. */
5546 cleanup = NULL_TREE;
5547 saved_processing_template_decl = processing_template_decl;
5549 /* If a name was specified, get the string. */
5550 if (global_scope_p (current_binding_level))
5551 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5552 if (asmspec_tree && asmspec_tree != error_mark_node)
5553 asmspec = TREE_STRING_POINTER (asmspec_tree);
5555 if (current_class_type
5556 && CP_DECL_CONTEXT (decl) == current_class_type
5557 && TYPE_BEING_DEFINED (current_class_type)
5558 && (DECL_INITIAL (decl) || init))
5559 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5561 auto_node = type_uses_auto (type);
5564 if (init == NULL_TREE)
5566 error ("declaration of %q#D has no initializer", decl);
5567 TREE_TYPE (decl) = error_mark_node;
5570 if (TREE_CODE (init) == TREE_LIST)
5571 init = build_x_compound_expr_from_list (init, "initializer");
5572 if (describable_type (init))
5574 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5575 if (type == error_mark_node)
5580 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5582 if (init == ridpointers[(int)RID_DELETE])
5584 /* FIXME check this is 1st decl. */
5585 DECL_DELETED_FN (decl) = 1;
5586 DECL_DECLARED_INLINE_P (decl) = 1;
5587 DECL_INITIAL (decl) = error_mark_node;
5590 else if (init == ridpointers[(int)RID_DEFAULT])
5592 if (!defaultable_fn_p (decl))
5594 error ("%qD cannot be defaulted", decl);
5595 DECL_INITIAL (decl) = NULL_TREE;
5598 DECL_DEFAULTED_FN (decl) = 1;
5602 if (processing_template_decl)
5604 bool type_dependent_p;
5606 /* Add this declaration to the statement-tree. */
5607 if (at_function_scope_p ())
5608 add_decl_expr (decl);
5610 type_dependent_p = dependent_type_p (type);
5612 if (check_for_bare_parameter_packs (init))
5615 DECL_INITIAL (decl) = NULL_TREE;
5618 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5620 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5621 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5622 TREE_CONSTANT (decl) = 1;
5625 /* Generally, initializers in templates are expanded when the
5626 template is instantiated. But, if DECL is an integral
5627 constant static data member, then it can be used in future
5628 integral constant expressions, and its value must be
5631 && DECL_CLASS_SCOPE_P (decl)
5632 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5633 && !type_dependent_p
5634 && !value_dependent_init_p (init)))
5637 DECL_INITIAL (decl) = init;
5638 if (TREE_CODE (decl) == VAR_DECL
5639 && !DECL_PRETTY_FUNCTION_P (decl)
5640 && !type_dependent_p)
5641 maybe_deduce_size_from_array_init (decl, init);
5645 if (TREE_CODE (init) == TREE_LIST)
5647 /* If the parenthesized-initializer form was used (e.g.,
5648 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5649 arguments. (There is generally only one.) We convert them
5652 for (; list; list = TREE_CHAIN (list))
5654 tree elt = TREE_VALUE (list);
5655 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5659 init = fold_non_dependent_expr (init);
5660 processing_template_decl = 0;
5663 /* Take care of TYPE_DECLs up front. */
5664 if (TREE_CODE (decl) == TYPE_DECL)
5666 if (type != error_mark_node
5667 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5669 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5670 warning (0, "shadowing previous type declaration of %q#D", decl);
5671 set_identifier_type_value (DECL_NAME (decl), decl);
5674 /* If we have installed this as the canonical typedef for this
5675 type, and that type has not been defined yet, delay emitting
5676 the debug information for it, as we will emit it later. */
5677 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5678 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5679 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5681 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5686 /* A reference will be modified here, as it is initialized. */
5687 if (! DECL_EXTERNAL (decl)
5688 && TREE_READONLY (decl)
5689 && TREE_CODE (type) == REFERENCE_TYPE)
5692 TREE_READONLY (decl) = 0;
5695 if (TREE_CODE (decl) == VAR_DECL)
5697 /* Only variables with trivial initialization and destruction can
5698 have thread-local storage. */
5699 if (DECL_THREAD_LOCAL_P (decl)
5700 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5701 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5702 error ("%qD cannot be thread-local because it has non-trivial "
5703 "type %qT", decl, TREE_TYPE (decl));
5704 /* If this is a local variable that will need a mangled name,
5705 register it now. We must do this before processing the
5706 initializer for the variable, since the initialization might
5707 require a guard variable, and since the mangled name of the
5708 guard variable will depend on the mangled name of this
5710 if (DECL_FUNCTION_SCOPE_P (decl)
5711 && TREE_STATIC (decl)
5712 && !DECL_ARTIFICIAL (decl))
5713 push_local_name (decl);
5714 /* Convert the initializer to the type of DECL, if we have not
5715 already initialized DECL. */
5716 if (!DECL_INITIALIZED_P (decl)
5717 /* If !DECL_EXTERNAL then DECL is being defined. In the
5718 case of a static data member initialized inside the
5719 class-specifier, there can be an initializer even if DECL
5720 is *not* defined. */
5721 && (!DECL_EXTERNAL (decl) || init))
5723 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5726 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5727 /* Allow libjava/prims.cc define primitive classes. */
5728 if (init != NULL_TREE
5729 || jclass == NULL_TREE
5730 || TREE_CODE (jclass) != TYPE_DECL
5731 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5732 || !same_type_ignoring_top_level_qualifiers_p
5733 (type, TREE_TYPE (TREE_TYPE (jclass))))
5734 error ("Java object %qD not allocated with %<new%>", decl);
5739 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5740 if (init_const_expr_p)
5742 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5743 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5744 TREE_CONSTANT (decl) = 1;
5747 init = check_initializer (decl, init, flags, &cleanup);
5748 /* Thread-local storage cannot be dynamically initialized. */
5749 if (DECL_THREAD_LOCAL_P (decl) && init)
5751 error ("%qD is thread-local and so cannot be dynamically "
5752 "initialized", decl);
5756 /* Check that the initializer for a static data member was a
5757 constant. Although we check in the parser that the
5758 initializer is an integral constant expression, we do not
5759 simplify division-by-zero at the point at which it
5760 occurs. Therefore, in:
5762 struct S { static const int i = 7 / 0; };
5764 we issue an error at this point. It would
5765 probably be better to forbid division by zero in
5766 integral constant expressions. */
5767 if (DECL_EXTERNAL (decl) && init)
5769 error ("%qD cannot be initialized by a non-constant expression"
5770 " when being declared", decl);
5771 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5779 The memory occupied by any object of static storage
5780 duration is zero-initialized at program startup before
5781 any other initialization takes place.
5783 We cannot create an appropriate initializer until after
5784 the type of DECL is finalized. If DECL_INITIAL is set,
5785 then the DECL is statically initialized, and any
5786 necessary zero-initialization has already been performed. */
5787 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5788 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5789 /*nelts=*/NULL_TREE,
5790 /*static_storage_p=*/true);
5791 /* Remember that the initialization for this variable has
5793 DECL_INITIALIZED_P (decl) = 1;
5794 /* This declaration is the definition of this variable,
5795 unless we are initializing a static data member within
5796 the class specifier. */
5797 if (!DECL_EXTERNAL (decl))
5798 var_definition_p = true;
5800 /* If the variable has an array type, lay out the type, even if
5801 there is no initializer. It is valid to index through the
5802 array, and we must get TYPE_ALIGN set correctly on the array
5804 else if (TREE_CODE (type) == ARRAY_TYPE)
5807 else if (TREE_CODE (decl) == FIELD_DECL
5808 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5809 error ("non-static data member %qD has Java class type", decl);
5811 /* Add this declaration to the statement-tree. This needs to happen
5812 after the call to check_initializer so that the DECL_EXPR for a
5813 reference temp is added before the DECL_EXPR for the reference itself. */
5814 if (at_function_scope_p ())
5815 add_decl_expr (decl);
5817 /* Let the middle end know about variables and functions -- but not
5818 static data members in uninstantiated class templates. */
5819 if (!saved_processing_template_decl
5820 && (TREE_CODE (decl) == VAR_DECL
5821 || TREE_CODE (decl) == FUNCTION_DECL))
5823 if (TREE_CODE (decl) == VAR_DECL)
5825 layout_var_decl (decl);
5826 maybe_commonize_var (decl);
5829 /* This needs to happen after the linkage is set. */
5830 determine_visibility (decl);
5832 if (var_definition_p && TREE_STATIC (decl))
5834 /* If a TREE_READONLY variable needs initialization
5835 at runtime, it is no longer readonly and we need to
5836 avoid MEM_READONLY_P being set on RTL created for it. */
5839 if (TREE_READONLY (decl))
5840 TREE_READONLY (decl) = 0;
5843 else if (was_readonly)
5844 TREE_READONLY (decl) = 1;
5847 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5849 /* Check for abstractness of the type. Notice that there is no
5850 need to strip array types here since the check for those types
5851 is already done within create_array_type_for_decl. */
5852 if (TREE_CODE (type) == FUNCTION_TYPE
5853 || TREE_CODE (type) == METHOD_TYPE)
5854 abstract_virtuals_error (decl, TREE_TYPE (type));
5856 abstract_virtuals_error (decl, type);
5858 if (TREE_TYPE (decl) == error_mark_node)
5859 /* No initialization required. */
5861 else if (TREE_CODE (decl) == FUNCTION_DECL)
5865 if (init == ridpointers[(int)RID_DEFAULT])
5867 /* An out-of-class default definition is defined at
5868 the point where it is explicitly defaulted. */
5869 if (DECL_INITIAL (decl) == error_mark_node)
5870 synthesize_method (decl);
5873 error ("function %q#D is initialized like a variable", decl);
5875 /* else no initialization required. */
5877 else if (DECL_EXTERNAL (decl)
5878 && ! (DECL_LANG_SPECIFIC (decl)
5879 && DECL_NOT_REALLY_EXTERN (decl)))
5882 DECL_INITIAL (decl) = init;
5884 /* A variable definition. */
5885 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5886 /* Initialize the local variable. */
5887 initialize_local_var (decl, init);
5889 /* If a variable is defined, and then a subsequent
5890 definition with external linkage is encountered, we will
5891 get here twice for the same variable. We want to avoid
5892 calling expand_static_init more than once. For variables
5893 that are not static data members, we can call
5894 expand_static_init only when we actually process the
5895 initializer. It is not legal to redeclare a static data
5896 member, so this issue does not arise in that case. */
5897 else if (var_definition_p && TREE_STATIC (decl))
5898 expand_static_init (decl, init);
5901 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5902 reference, insert it in the statement-tree now. */
5904 push_cleanup (decl, cleanup, false);
5907 processing_template_decl = saved_processing_template_decl;
5910 TREE_READONLY (decl) = 1;
5912 /* If this was marked 'used', be sure it will be output. */
5913 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5914 mark_decl_referenced (decl);
5917 /* Returns a declaration for a VAR_DECL as if:
5919 extern "C" TYPE NAME;
5921 had been seen. Used to create compiler-generated global
5925 declare_global_var (tree name, tree type)
5929 push_to_top_level ();
5930 decl = build_decl (input_location, VAR_DECL, name, type);
5931 TREE_PUBLIC (decl) = 1;
5932 DECL_EXTERNAL (decl) = 1;
5933 DECL_ARTIFICIAL (decl) = 1;
5934 /* If the user has explicitly declared this variable (perhaps
5935 because the code we are compiling is part of a low-level runtime
5936 library), then it is possible that our declaration will be merged
5937 with theirs by pushdecl. */
5938 decl = pushdecl (decl);
5939 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5940 pop_from_top_level ();
5945 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5946 if "__cxa_atexit" is not being used) corresponding to the function
5947 to be called when the program exits. */
5950 get_atexit_fn_ptr_type (void)
5955 if (!atexit_fn_ptr_type_node)
5957 if (flag_use_cxa_atexit
5958 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5959 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5960 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5962 /* The parameter to "atexit" is "void (*)(void)". */
5963 arg_types = void_list_node;
5965 fn_type = build_function_type (void_type_node, arg_types);
5966 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5969 return atexit_fn_ptr_type_node;
5972 /* Returns a pointer to the `atexit' function. Note that if
5973 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5974 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5977 get_atexit_node (void)
5984 bool use_aeabi_atexit;
5989 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5991 /* The declaration for `__cxa_atexit' is:
5993 int __cxa_atexit (void (*)(void *), void *, void *)
5995 We build up the argument types and then then function type
5998 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5999 /* First, build the pointer-to-function type for the first
6001 fn_ptr_type = get_atexit_fn_ptr_type ();
6002 /* Then, build the rest of the argument types. */
6003 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6004 if (use_aeabi_atexit)
6006 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6007 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6011 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6012 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6014 /* And the final __cxa_atexit type. */
6015 fn_type = build_function_type (integer_type_node, arg_types);
6016 fn_ptr_type = build_pointer_type (fn_type);
6017 if (use_aeabi_atexit)
6018 name = "__aeabi_atexit";
6020 name = "__cxa_atexit";
6024 /* The declaration for `atexit' is:
6026 int atexit (void (*)());
6028 We build up the argument types and then then function type
6030 fn_ptr_type = get_atexit_fn_ptr_type ();
6031 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6032 /* Build the final atexit type. */
6033 fn_type = build_function_type (integer_type_node, arg_types);
6037 /* Now, build the function declaration. */
6038 push_lang_context (lang_name_c);
6039 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6040 mark_used (atexit_fndecl);
6041 pop_lang_context ();
6042 atexit_node = decay_conversion (atexit_fndecl);
6047 /* Returns the __dso_handle VAR_DECL. */
6050 get_dso_handle_node (void)
6052 if (dso_handle_node)
6053 return dso_handle_node;
6055 /* Declare the variable. */
6056 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6059 return dso_handle_node;
6062 /* Begin a new function with internal linkage whose job will be simply
6063 to destroy some particular variable. */
6065 static GTY(()) int start_cleanup_cnt;
6068 start_cleanup_fn (void)
6073 bool use_cxa_atexit = flag_use_cxa_atexit
6074 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6076 push_to_top_level ();
6078 /* No need to mangle this. */
6079 push_lang_context (lang_name_c);
6081 /* Build the name of the function. */
6082 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6083 /* Build the function declaration. */
6084 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6085 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6086 /* It's a function with internal linkage, generated by the
6088 TREE_PUBLIC (fndecl) = 0;
6089 DECL_ARTIFICIAL (fndecl) = 1;
6090 /* Make the function `inline' so that it is only emitted if it is
6091 actually needed. It is unlikely that it will be inlined, since
6092 it is only called via a function pointer, but we avoid unnecessary
6093 emissions this way. */
6094 DECL_DECLARED_INLINE_P (fndecl) = 1;
6095 DECL_INTERFACE_KNOWN (fndecl) = 1;
6096 /* Build the parameter. */
6101 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6102 DECL_CONTEXT (parmdecl) = fndecl;
6103 TREE_USED (parmdecl) = 1;
6104 DECL_ARGUMENTS (fndecl) = parmdecl;
6108 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6110 pop_lang_context ();
6112 return current_function_decl;
6115 /* Finish the cleanup function begun by start_cleanup_fn. */
6118 end_cleanup_fn (void)
6120 expand_or_defer_fn (finish_function (0));
6122 pop_from_top_level ();
6125 /* Generate code to handle the destruction of DECL, an object with
6126 static storage duration. */
6129 register_dtor_fn (tree decl)
6138 type = TREE_TYPE (decl);
6139 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6140 return void_zero_node;
6142 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6143 a class object, we can just pass the destructor to
6144 "__cxa_atexit"; we don't have to build a temporary function to do
6146 use_dtor = (flag_use_cxa_atexit
6147 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6148 && CLASS_TYPE_P (type));
6153 /* Find the destructor. */
6154 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6155 gcc_assert (idx >= 0);
6156 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6157 /* Make sure it is accessible. */
6158 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6162 /* Call build_cleanup before we enter the anonymous function so
6163 that any access checks will be done relative to the current
6164 scope, rather than the scope of the anonymous function. */
6165 build_cleanup (decl);
6167 /* Now start the function. */
6168 cleanup = start_cleanup_fn ();
6170 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6171 to the original function, rather than the anonymous one. That
6172 will make the back end think that nested functions are in use,
6173 which causes confusion. */
6174 push_deferring_access_checks (dk_no_check);
6175 fcall = build_cleanup (decl);
6176 pop_deferring_access_checks ();
6178 /* Create the body of the anonymous function. */
6179 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6180 finish_expr_stmt (fcall);
6181 finish_compound_stmt (compound_stmt);
6185 /* Call atexit with the cleanup function. */
6186 mark_used (cleanup);
6187 cleanup = build_address (cleanup);
6188 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6194 /* We must convert CLEANUP to the type that "__cxa_atexit"
6196 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6197 /* "__cxa_atexit" will pass the address of DECL to the
6198 cleanup function. */
6200 addr = build_address (decl);
6201 /* The declared type of the parameter to "__cxa_atexit" is
6202 "void *". For plain "T*", we could just let the
6203 machinery in cp_build_function_call convert it -- but if the
6204 type is "cv-qualified T *", then we need to convert it
6205 before passing it in, to avoid spurious errors. */
6206 addr = build_nop (ptr_type_node, addr);
6209 /* Since the cleanup functions we build ignore the address
6210 they're given, there's no reason to pass the actual address
6211 in, and, in general, it's cheaper to pass NULL than any
6213 addr = null_pointer_node;
6214 args = tree_cons (NULL_TREE,
6215 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6216 tf_warning_or_error),
6218 if (targetm.cxx.use_aeabi_atexit ())
6220 args = tree_cons (NULL_TREE, cleanup, args);
6221 args = tree_cons (NULL_TREE, addr, args);
6225 args = tree_cons (NULL_TREE, addr, args);
6226 args = tree_cons (NULL_TREE, cleanup, args);
6230 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6231 return cp_build_function_call (get_atexit_node (), args,
6232 tf_warning_or_error);
6235 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6236 is its initializer. Generate code to handle the construction
6237 and destruction of DECL. */
6240 expand_static_init (tree decl, tree init)
6242 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6243 gcc_assert (TREE_STATIC (decl));
6245 /* Some variables require no initialization. */
6247 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6248 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6251 if (DECL_FUNCTION_SCOPE_P (decl))
6253 /* Emit code to perform this initialization but once. */
6254 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6255 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6256 tree guard, guard_addr;
6257 tree acquire_fn, release_fn, abort_fn;
6260 /* Emit code to perform this initialization but once. This code
6263 static <type> guard;
6264 if (!guard.first_byte) {
6265 if (__cxa_guard_acquire (&guard)) {
6268 // Do initialization.
6269 flag = true; __cxa_guard_release (&guard);
6270 // Register variable for destruction at end of program.
6272 if (!flag) __cxa_guard_abort (&guard);
6276 Note that the `flag' variable is only set to 1 *after* the
6277 initialization is complete. This ensures that an exception,
6278 thrown during the construction, will cause the variable to
6279 reinitialized when we pass through this code again, as per:
6283 If the initialization exits by throwing an exception, the
6284 initialization is not complete, so it will be tried again
6285 the next time control enters the declaration.
6287 This process should be thread-safe, too; multiple threads
6288 should not be able to initialize the variable more than
6291 /* Create the guard variable. */
6292 guard = get_guard (decl);
6294 /* This optimization isn't safe on targets with relaxed memory
6295 consistency. On such targets we force synchronization in
6296 __cxa_guard_acquire. */
6297 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6299 /* Begin the conditional initialization. */
6300 if_stmt = begin_if_stmt ();
6301 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6302 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6305 if (flag_threadsafe_statics)
6307 guard_addr = build_address (guard);
6309 acquire_fn = get_identifier ("__cxa_guard_acquire");
6310 release_fn = get_identifier ("__cxa_guard_release");
6311 abort_fn = get_identifier ("__cxa_guard_abort");
6312 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6314 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6316 tree vfntype = build_function_type (void_type_node, argtypes);
6317 acquire_fn = push_library_fn
6318 (acquire_fn, build_function_type (integer_type_node, argtypes),
6320 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6321 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6325 release_fn = identifier_global_value (release_fn);
6326 abort_fn = identifier_global_value (abort_fn);
6329 inner_if_stmt = begin_if_stmt ();
6330 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6333 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6334 begin = get_target_expr (boolean_false_node);
6335 flag = TARGET_EXPR_SLOT (begin);
6337 TARGET_EXPR_CLEANUP (begin)
6338 = build3 (COND_EXPR, void_type_node, flag,
6340 build_call_n (abort_fn, 1, guard_addr));
6341 CLEANUP_EH_ONLY (begin) = 1;
6343 /* Do the initialization itself. */
6344 init = add_stmt_to_compound (begin, init);
6345 init = add_stmt_to_compound
6346 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6347 init = add_stmt_to_compound
6348 (init, build_call_n (release_fn, 1, guard_addr));
6351 init = add_stmt_to_compound (init, set_guard (guard));
6353 /* Use atexit to register a function for destroying this static
6355 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6357 finish_expr_stmt (init);
6359 if (flag_threadsafe_statics)
6361 finish_compound_stmt (inner_then_clause);
6362 finish_then_clause (inner_if_stmt);
6363 finish_if_stmt (inner_if_stmt);
6366 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6368 finish_compound_stmt (then_clause);
6369 finish_then_clause (if_stmt);
6370 finish_if_stmt (if_stmt);
6374 static_aggregates = tree_cons (init, decl, static_aggregates);
6378 /* Make TYPE a complete type based on INITIAL_VALUE.
6379 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6380 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6381 3 if the initializer list is empty (in pedantic mode). */
6384 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6387 tree type, elt_type;
6391 unsigned HOST_WIDE_INT i;
6394 /* An array of character type can be initialized from a
6395 brace-enclosed string constant.
6397 FIXME: this code is duplicated from reshape_init. Probably
6398 we should just call reshape_init here? */
6399 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6400 && TREE_CODE (initial_value) == CONSTRUCTOR
6401 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6403 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6404 tree value = VEC_index (constructor_elt, v, 0)->value;
6406 if (TREE_CODE (value) == STRING_CST
6407 && VEC_length (constructor_elt, v) == 1)
6408 initial_value = value;
6411 /* If any of the elements are parameter packs, we can't actually
6412 complete this type now because the array size is dependent. */
6413 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6415 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6418 if (PACK_EXPANSION_P (value))
6424 failure = complete_array_type (ptype, initial_value, do_default);
6426 /* We can create the array before the element type is complete, which
6427 means that we didn't have these two bits set in the original type
6428 either. In completing the type, we are expected to propagate these
6429 bits. See also complete_type which does the same thing for arrays
6432 if (TYPE_DOMAIN (type))
6434 elt_type = TREE_TYPE (type);
6435 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6436 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6437 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6443 /* Return zero if something is declared to be a member of type
6444 CTYPE when in the context of CUR_TYPE. STRING is the error
6445 message to print in that case. Otherwise, quietly return 1. */
6448 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6450 if (ctype && ctype != cur_type)
6452 if (flags == DTOR_FLAG)
6453 error ("destructor for alien class %qT cannot be a member", ctype);
6455 error ("constructor for alien class %qT cannot be a member", ctype);
6461 /* Subroutine of `grokdeclarator'. */
6463 /* Generate errors possibly applicable for a given set of specifiers.
6464 This is for ARM $7.1.2. */
6467 bad_specifiers (tree object,
6476 error ("%qD declared as a %<virtual%> %s", object, type);
6478 error ("%qD declared as an %<inline%> %s", object, type);
6480 error ("%<const%> and %<volatile%> function specifiers on "
6481 "%qD invalid in %s declaration",
6484 error ("%q+D declared as a friend", object);
6486 && (TREE_CODE (object) == TYPE_DECL
6487 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6488 && !TYPE_REFFN_P (TREE_TYPE (object))
6489 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6490 error ("%q+D declared with an exception specification", object);
6493 /* DECL is a member function or static data member and is presently
6494 being defined. Check that the definition is taking place in a
6498 check_class_member_definition_namespace (tree decl)
6500 /* These checks only apply to member functions and static data
6502 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6503 || TREE_CODE (decl) == VAR_DECL);
6504 /* We check for problems with specializations in pt.c in
6505 check_specialization_namespace, where we can issue better
6507 if (processing_specialization)
6509 /* There are no restrictions on the placement of
6510 explicit instantiations. */
6511 if (processing_explicit_instantiation)
6515 A member function definition that appears outside of the
6516 class definition shall appear in a namespace scope enclosing
6517 the class definition.
6521 The definition for a static data member shall appear in a
6522 namespace scope enclosing the member's class definition. */
6523 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6524 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6525 decl, DECL_CONTEXT (decl));
6528 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6529 METHOD_TYPE for a non-static member function; QUALS are the
6530 cv-qualifiers that apply to the function. */
6533 build_this_parm (tree type, cp_cv_quals quals)
6538 cp_cv_quals this_quals;
6540 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6541 /* The `this' parameter is implicitly `const'; it cannot be
6543 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6544 qual_type = cp_build_qualified_type (this_type, this_quals);
6545 parm = build_artificial_parm (this_identifier, qual_type);
6546 cp_apply_type_quals_to_decl (this_quals, parm);
6550 /* CTYPE is class type, or null if non-class.
6551 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6553 DECLARATOR is the function's name.
6554 PARMS is a chain of PARM_DECLs for the function.
6555 VIRTUALP is truthvalue of whether the function is virtual or not.
6556 FLAGS are to be passed through to `grokclassfn'.
6557 QUALS are qualifiers indicating whether the function is `const'
6559 RAISES is a list of exceptions that this function can raise.
6560 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6561 not look, and -1 if we should not call `grokclassfn' at all.
6563 SFK is the kind of special function (if any) for the new function.
6565 Returns `NULL_TREE' if something goes wrong, after issuing
6566 applicable error messages. */
6569 grokfndecl (tree ctype,
6573 tree orig_declarator,
6575 enum overload_flags flags,
6582 special_function_kind sfk,
6587 location_t location)
6590 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6594 type = build_exception_variant (type, raises);
6596 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6598 /* If we have an explicit location, use it, otherwise use whatever
6599 build_lang_decl used (probably input_location). */
6600 if (location != UNKNOWN_LOCATION)
6601 DECL_SOURCE_LOCATION (decl) = location;
6603 if (TREE_CODE (type) == METHOD_TYPE)
6606 parm = build_this_parm (type, quals);
6607 TREE_CHAIN (parm) = parms;
6610 DECL_ARGUMENTS (decl) = parms;
6611 for (t = parms; t; t = TREE_CHAIN (t))
6612 DECL_CONTEXT (t) = decl;
6613 /* Propagate volatile out from type to decl. */
6614 if (TYPE_VOLATILE (type))
6615 TREE_THIS_VOLATILE (decl) = 1;
6617 /* Setup decl according to sfk. */
6620 case sfk_constructor:
6621 case sfk_copy_constructor:
6622 DECL_CONSTRUCTOR_P (decl) = 1;
6624 case sfk_destructor:
6625 DECL_DESTRUCTOR_P (decl) = 1;
6631 /* If pointers to member functions use the least significant bit to
6632 indicate whether a function is virtual, ensure a pointer
6633 to this function will have that bit clear. */
6634 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6635 && TREE_CODE (type) == METHOD_TYPE
6636 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6637 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6640 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6644 ("defining explicit specialization %qD in friend declaration",
6648 tree fns = TREE_OPERAND (orig_declarator, 0);
6649 tree args = TREE_OPERAND (orig_declarator, 1);
6651 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6653 /* Something like `template <class T> friend void f<T>()'. */
6654 error ("invalid use of template-id %qD in declaration "
6655 "of primary template",
6661 /* A friend declaration of the form friend void f<>(). Record
6662 the information in the TEMPLATE_ID_EXPR. */
6663 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6665 if (TREE_CODE (fns) == COMPONENT_REF)
6667 /* Due to bison parser ickiness, we will have already looked
6668 up an operator_name or PFUNCNAME within the current class
6669 (see template_id in parse.y). If the current class contains
6670 such a name, we'll get a COMPONENT_REF here. Undo that. */
6672 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6673 == current_class_type);
6674 fns = TREE_OPERAND (fns, 1);
6676 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6677 || TREE_CODE (fns) == OVERLOAD);
6678 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6680 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6681 if (TREE_PURPOSE (t)
6682 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6684 error ("default arguments are not allowed in declaration "
6685 "of friend template specialization %qD",
6692 error ("%<inline%> is not allowed in declaration of friend "
6693 "template specialization %qD",
6700 /* If this decl has namespace scope, set that up. */
6702 set_decl_namespace (decl, in_namespace, friendp);
6704 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6706 /* `main' and builtins have implicit 'C' linkage. */
6707 if ((MAIN_NAME_P (declarator)
6708 || (IDENTIFIER_LENGTH (declarator) > 10
6709 && IDENTIFIER_POINTER (declarator)[0] == '_'
6710 && IDENTIFIER_POINTER (declarator)[1] == '_'
6711 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6712 && current_lang_name == lang_name_cplusplus
6713 && ctype == NULL_TREE
6714 /* NULL_TREE means global namespace. */
6715 && DECL_CONTEXT (decl) == NULL_TREE)
6716 SET_DECL_LANGUAGE (decl, lang_c);
6718 /* Should probably propagate const out from type to decl I bet (mrs). */
6721 DECL_STATIC_FUNCTION_P (decl) = 1;
6722 DECL_CONTEXT (decl) = ctype;
6727 DECL_CONTEXT (decl) = ctype;
6729 check_class_member_definition_namespace (decl);
6732 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6734 if (processing_template_decl)
6735 error ("cannot declare %<::main%> to be a template");
6737 error ("cannot declare %<::main%> to be inline");
6739 error ("cannot declare %<::main%> to be static");
6744 /* Members of anonymous types and local classes have no linkage; make
6745 them internal. If a typedef is made later, this will be changed. */
6746 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6747 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6750 TREE_PUBLIC (decl) = publicp;
6753 DECL_INTERFACE_KNOWN (decl) = 1;
6754 DECL_NOT_REALLY_EXTERN (decl) = 1;
6757 /* If the declaration was declared inline, mark it as such. */
6759 DECL_DECLARED_INLINE_P (decl) = 1;
6761 DECL_EXTERNAL (decl) = 1;
6762 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6765 ? G_("static member function %qD cannot have cv-qualifier")
6766 : G_("non-member function %qD cannot have cv-qualifier"),
6768 quals = TYPE_UNQUALIFIED;
6771 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6772 && !grok_op_properties (decl, /*complain=*/true))
6775 if (ctype && decl_function_context (decl))
6776 DECL_NO_STATIC_CHAIN (decl) = 1;
6779 /* Make the init_value nonzero so pushdecl knows this is not
6780 tentative. error_mark_node is replaced later with the BLOCK. */
6781 DECL_INITIAL (decl) = error_mark_node;
6783 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6784 TREE_NOTHROW (decl) = 1;
6786 /* Caller will do the rest of this. */
6790 if (ctype != NULL_TREE)
6791 grokclassfn (ctype, decl, flags);
6793 decl = check_explicit_specialization (orig_declarator, decl,
6796 4 * (friendp != 0));
6797 if (decl == error_mark_node)
6802 cplus_decl_attributes (&decl, *attrlist, 0);
6803 *attrlist = NULL_TREE;
6806 /* Check main's type after attributes have been applied. */
6807 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6809 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6812 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6814 error ("%<::main%> must return %<int%>");
6815 newtype = build_function_type (integer_type_node, oldtypeargs);
6816 TREE_TYPE (decl) = newtype;
6819 check_main_parameter_types (decl);
6822 if (ctype != NULL_TREE
6823 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6826 tree old_decl = check_classfn (ctype, decl,
6827 (processing_template_decl
6828 > template_class_depth (ctype))
6829 ? current_template_parms
6832 if (old_decl == error_mark_node)
6840 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6841 /* Because grokfndecl is always supposed to return a
6842 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6843 here. We depend on our callers to figure out that its
6844 really a template that's being returned. */
6845 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6847 if (DECL_STATIC_FUNCTION_P (old_decl)
6848 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6849 /* Remove the `this' parm added by grokclassfn.
6850 XXX Isn't this done in start_function, too? */
6851 revert_static_member_fn (decl);
6852 if (DECL_ARTIFICIAL (old_decl))
6854 error ("definition of implicitly-declared %qD", old_decl);
6858 /* Since we've smashed OLD_DECL to its
6859 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6860 if (TREE_CODE (decl) == TEMPLATE_DECL)
6861 decl = DECL_TEMPLATE_RESULT (decl);
6863 /* Attempt to merge the declarations. This can fail, in
6864 the case of some invalid specialization declarations. */
6865 pushed_scope = push_scope (ctype);
6866 ok = duplicate_decls (decl, old_decl, friendp);
6868 pop_scope (pushed_scope);
6871 error ("no %q#D member function declared in class %qT",
6879 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6882 if (ctype == NULL_TREE || check)
6886 DECL_VIRTUAL_P (decl) = 1;
6891 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6892 the linkage that DECL will receive in the object file. */
6895 set_linkage_for_static_data_member (tree decl)
6897 /* A static data member always has static storage duration and
6898 external linkage. Note that static data members are forbidden in
6899 local classes -- the only situation in which a class has
6900 non-external linkage. */
6901 TREE_PUBLIC (decl) = 1;
6902 TREE_STATIC (decl) = 1;
6903 /* For non-template classes, static data members are always put
6904 out in exactly those files where they are defined, just as
6905 with ordinary namespace-scope variables. */
6906 if (!processing_template_decl)
6907 DECL_INTERFACE_KNOWN (decl) = 1;
6910 /* Create a VAR_DECL named NAME with the indicated TYPE.
6912 If SCOPE is non-NULL, it is the class type or namespace containing
6913 the variable. If SCOPE is NULL, the variable should is created in
6914 the innermost enclosings scope. */
6917 grokvardecl (tree type,
6919 const cp_decl_specifier_seq *declspecs,
6925 tree explicit_scope;
6927 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6929 /* Compute the scope in which to place the variable, but remember
6930 whether or not that scope was explicitly specified by the user. */
6931 explicit_scope = scope;
6934 /* An explicit "extern" specifier indicates a namespace-scope
6936 if (declspecs->storage_class == sc_extern)
6937 scope = current_namespace;
6938 else if (!at_function_scope_p ())
6939 scope = current_scope ();
6943 && (/* If the variable is a namespace-scope variable declared in a
6944 template, we need DECL_LANG_SPECIFIC. */
6945 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6946 /* Similarly for namespace-scope variables with language linkage
6948 || (TREE_CODE (scope) == NAMESPACE_DECL
6949 && current_lang_name != lang_name_cplusplus)
6950 /* Similarly for static data members. */
6952 decl = build_lang_decl (VAR_DECL, name, type);
6954 decl = build_decl (input_location, VAR_DECL, name, type);
6956 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6957 set_decl_namespace (decl, explicit_scope, 0);
6959 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6961 if (declspecs->storage_class == sc_extern)
6963 DECL_THIS_EXTERN (decl) = 1;
6964 DECL_EXTERNAL (decl) = !initialized;
6967 if (DECL_CLASS_SCOPE_P (decl))
6969 set_linkage_for_static_data_member (decl);
6970 /* This function is only called with out-of-class definitions. */
6971 DECL_EXTERNAL (decl) = 0;
6972 check_class_member_definition_namespace (decl);
6974 /* At top level, either `static' or no s.c. makes a definition
6975 (perhaps tentative), and absence of `static' makes it public. */
6976 else if (toplevel_bindings_p ())
6978 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6979 && (DECL_THIS_EXTERN (decl) || ! constp));
6980 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6982 /* Not at top level, only `static' makes a static definition. */
6985 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6986 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6989 if (declspecs->specs[(int)ds_thread])
6990 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6992 if (TREE_PUBLIC (decl))
6994 /* If the type of the decl has no linkage, make sure that we'll
6995 notice that in mark_used. */
6996 if (DECL_LANG_SPECIFIC (decl) == NULL
6997 && TREE_PUBLIC (decl)
6998 && !DECL_EXTERN_C_P (decl)
6999 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7000 retrofit_lang_decl (decl);
7003 DECL_INTERFACE_KNOWN (decl) = 1;
7008 /* Create and return a canonical pointer to member function type, for
7009 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7012 build_ptrmemfunc_type (tree type)
7016 tree unqualified_variant = NULL_TREE;
7018 if (type == error_mark_node)
7021 /* If a canonical type already exists for this type, use it. We use
7022 this method instead of type_hash_canon, because it only does a
7023 simple equality check on the list of field members. */
7025 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7028 /* Make sure that we always have the unqualified pointer-to-member
7030 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7032 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7034 t = make_class_type (RECORD_TYPE);
7035 xref_basetypes (t, NULL_TREE);
7037 /* Let the front end know this is a pointer to member function... */
7038 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7039 /* ... and not really a class type. */
7040 SET_CLASS_TYPE_P (t, 0);
7042 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7045 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7047 TREE_CHAIN (field) = fields;
7050 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7052 /* Zap out the name so that the back end will give us the debugging
7053 information for this anonymous RECORD_TYPE. */
7054 TYPE_NAME (t) = NULL_TREE;
7056 /* If this is not the unqualified form of this pointer-to-member
7057 type, set the TYPE_MAIN_VARIANT for this type to be the
7058 unqualified type. Since they are actually RECORD_TYPEs that are
7059 not variants of each other, we must do this manually.
7060 As we just built a new type there is no need to do yet another copy. */
7061 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7063 int type_quals = cp_type_quals (type);
7064 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7065 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7066 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7067 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7068 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7069 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7070 TREE_TYPE (TYPE_BINFO (t)) = t;
7073 /* Cache this pointer-to-member type so that we can find it again
7075 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7077 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7078 SET_TYPE_STRUCTURAL_EQUALITY (t);
7079 else if (TYPE_CANONICAL (type) != type)
7080 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7085 /* Create and return a pointer to data member type. */
7088 build_ptrmem_type (tree class_type, tree member_type)
7090 if (TREE_CODE (member_type) == METHOD_TYPE)
7094 arg_types = TYPE_ARG_TYPES (member_type);
7095 class_type = (cp_build_qualified_type
7097 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7099 = build_method_type_directly (class_type,
7100 TREE_TYPE (member_type),
7101 TREE_CHAIN (arg_types));
7102 return build_ptrmemfunc_type (build_pointer_type (member_type));
7106 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7107 return build_offset_type (class_type, member_type);
7111 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7112 Check to see that the definition is valid. Issue appropriate error
7113 messages. Return 1 if the definition is particularly bad, or 0
7117 check_static_variable_definition (tree decl, tree type)
7119 /* Motion 10 at San Diego: If a static const integral data member is
7120 initialized with an integral constant expression, the initializer
7121 may appear either in the declaration (within the class), or in
7122 the definition, but not both. If it appears in the class, the
7123 member is a member constant. The file-scope definition is always
7125 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7127 error ("invalid in-class initialization of static data member "
7128 "of non-integral type %qT",
7130 /* If we just return the declaration, crashes will sometimes
7131 occur. We therefore return void_type_node, as if this were a
7132 friend declaration, to cause callers to completely ignore
7133 this declaration. */
7136 else if (!CP_TYPE_CONST_P (type))
7137 error ("ISO C++ forbids in-class initialization of non-const "
7138 "static member %qD",
7140 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7141 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7142 "%qD of non-integral type %qT", decl, type);
7147 /* Given the SIZE (i.e., number of elements) in an array, compute an
7148 appropriate index type for the array. If non-NULL, NAME is the
7149 name of the thing being declared. */
7152 compute_array_index_type (tree name, tree size)
7156 tree abi_1_itype = NULL_TREE;
7158 if (error_operand_p (size))
7159 return error_mark_node;
7161 type = TREE_TYPE (size);
7162 /* The array bound must be an integer type. */
7163 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7166 error ("size of array %qD has non-integral type %qT", name, type);
7168 error ("size of array has non-integral type %qT", type);
7169 size = integer_one_node;
7170 type = TREE_TYPE (size);
7173 /* We can only call value_dependent_expression_p on integral constant
7174 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7175 set if this isn't one. */
7176 if (processing_template_decl
7177 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7179 /* We cannot do any checking for a SIZE that isn't known to be
7180 constant. Just build the index type and mark that it requires
7181 structural equality checks. */
7182 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7183 size, integer_one_node));
7184 if (!TREE_SIDE_EFFECTS (size))
7186 TYPE_DEPENDENT_P (itype) = 1;
7187 TYPE_DEPENDENT_P_VALID (itype) = 1;
7189 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7193 if (!abi_version_at_least (2) && processing_template_decl)
7194 /* For abi-1, we handled all instances in templates the same way,
7195 even when they were non-dependent. This affects the manglings
7196 produced. So, we do the normal checking for non-dependent
7197 sizes, but at the end we'll return the same type that abi-1
7198 would have, but with TYPE_CANONICAL set to the "right"
7199 value that the current ABI would provide. */
7200 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7201 size, integer_one_node));
7203 /* The size might be the result of a cast. */
7204 STRIP_TYPE_NOPS (size);
7206 /* It might be a const variable or enumeration constant. */
7207 size = integral_constant_value (size);
7209 /* Normally, the array-bound will be a constant. */
7210 if (TREE_CODE (size) == INTEGER_CST)
7212 /* Check to see if the array bound overflowed. Make that an
7213 error, no matter how generous we're being. */
7214 constant_expression_error (size);
7216 /* An array must have a positive number of elements. */
7217 if (INT_CST_LT (size, integer_zero_node))
7220 error ("size of array %qD is negative", name);
7222 error ("size of array is negative");
7223 size = integer_one_node;
7225 /* As an extension we allow zero-sized arrays. We always allow
7226 them in system headers because glibc uses them. */
7227 else if (integer_zerop (size) && !in_system_header)
7230 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7232 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7235 else if (TREE_CONSTANT (size))
7237 /* `(int) &fn' is not a valid array bound. */
7239 error ("size of array %qD is not an integral constant-expression",
7242 error ("size of array is not an integral constant-expression");
7243 size = integer_one_node;
7245 else if (pedantic && warn_vla != 0)
7248 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7250 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7252 else if (warn_vla > 0)
7256 "variable length array %qD is used", name);
7259 "variable length array is used");
7262 if (processing_template_decl && !TREE_CONSTANT (size))
7263 /* A variable sized array. */
7264 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7267 HOST_WIDE_INT saved_processing_template_decl;
7269 /* Compute the index of the largest element in the array. It is
7270 one less than the number of elements in the array. We save
7271 and restore PROCESSING_TEMPLATE_DECL so that computations in
7272 cp_build_binary_op will be appropriately folded. */
7273 saved_processing_template_decl = processing_template_decl;
7274 processing_template_decl = 0;
7275 itype = cp_build_binary_op (input_location,
7277 cp_convert (ssizetype, size),
7278 cp_convert (ssizetype, integer_one_node),
7279 tf_warning_or_error);
7280 itype = fold (itype);
7281 processing_template_decl = saved_processing_template_decl;
7283 if (!TREE_CONSTANT (itype))
7284 /* A variable sized array. */
7285 itype = variable_size (itype);
7286 /* Make sure that there was no overflow when creating to a signed
7287 index type. (For example, on a 32-bit machine, an array with
7288 size 2^32 - 1 is too big.) */
7289 else if (TREE_CODE (itype) == INTEGER_CST
7290 && TREE_OVERFLOW (itype))
7292 error ("overflow in array dimension");
7293 TREE_OVERFLOW (itype) = 0;
7297 /* Create and return the appropriate index type. */
7300 tree t = build_index_type (itype);
7301 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7305 return build_index_type (itype);
7308 /* Returns the scope (if any) in which the entity declared by
7309 DECLARATOR will be located. If the entity was declared with an
7310 unqualified name, NULL_TREE is returned. */
7313 get_scope_of_declarator (const cp_declarator *declarator)
7315 while (declarator && declarator->kind != cdk_id)
7316 declarator = declarator->declarator;
7318 /* If the declarator-id is a SCOPE_REF, the scope in which the
7319 declaration occurs is the first operand. */
7321 && declarator->u.id.qualifying_scope)
7322 return declarator->u.id.qualifying_scope;
7324 /* Otherwise, the declarator is not a qualified name; the entity will
7325 be declared in the current scope. */
7329 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7330 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7334 create_array_type_for_decl (tree name, tree type, tree size)
7336 tree itype = NULL_TREE;
7337 const char* error_msg;
7339 /* If things have already gone awry, bail now. */
7340 if (type == error_mark_node || size == error_mark_node)
7341 return error_mark_node;
7343 /* Assume that everything will go OK. */
7346 /* There are some types which cannot be array elements. */
7347 switch (TREE_CODE (type))
7350 error_msg = "array of void";
7354 error_msg = "array of functions";
7357 case REFERENCE_TYPE:
7358 error_msg = "array of references";
7362 error_msg = "array of function members";
7369 /* If something went wrong, issue an error-message and return. */
7373 error ("declaration of %qD as %s", name, error_msg);
7375 error ("creating %s", error_msg);
7377 return error_mark_node;
7382 The constant expressions that specify the bounds of the arrays
7383 can be omitted only for the first member of the sequence. */
7384 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7387 error ("declaration of %qD as multidimensional array must "
7388 "have bounds for all dimensions except the first",
7391 error ("multidimensional array must have bounds for all "
7392 "dimensions except the first");
7394 return error_mark_node;
7397 /* Figure out the index type for the array. */
7399 itype = compute_array_index_type (name, size);
7402 T is called the array element type; this type shall not be [...] an
7403 abstract class type. */
7404 abstract_virtuals_error (name, type);
7406 return build_cplus_array_type (type, itype);
7409 /* Check that it's OK to declare a function with the indicated TYPE.
7410 SFK indicates the kind of special function (if any) that this
7411 function is. OPTYPE is the type given in a conversion operator
7412 declaration, or the class type for a constructor/destructor.
7413 Returns the actual return type of the function; that
7414 may be different than TYPE if an error occurs, or for certain
7415 special functions. */
7418 check_special_function_return_type (special_function_kind sfk,
7424 case sfk_constructor:
7426 error ("return type specification for constructor invalid");
7428 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7429 type = build_pointer_type (optype);
7431 type = void_type_node;
7434 case sfk_destructor:
7436 error ("return type specification for destructor invalid");
7437 /* We can't use the proper return type here because we run into
7438 problems with ambiguous bases and covariant returns.
7439 Java classes are left unchanged because (void *) isn't a valid
7440 Java type, and we don't want to change the Java ABI. */
7441 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7442 type = build_pointer_type (void_type_node);
7444 type = void_type_node;
7447 case sfk_conversion:
7449 error ("return type specified for %<operator %T%>", optype);
7460 /* A variable or data member (whose unqualified name is IDENTIFIER)
7461 has been declared with the indicated TYPE. If the TYPE is not
7462 acceptable, issue an error message and return a type to use for
7463 error-recovery purposes. */
7466 check_var_type (tree identifier, tree type)
7468 if (VOID_TYPE_P (type))
7471 error ("unnamed variable or field declared void");
7472 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7474 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7475 error ("variable or field %qE declared void", identifier);
7478 error ("variable or field declared void");
7479 type = error_mark_node;
7485 /* Given declspecs and a declarator (abstract or otherwise), determine
7486 the name and type of the object declared and construct a DECL node
7489 DECLSPECS points to the representation of declaration-specifier
7490 sequence that precedes declarator.
7492 DECL_CONTEXT says which syntactic context this declaration is in:
7493 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7494 FUNCDEF for a function definition. Like NORMAL but a few different
7495 error messages in each case. Return value may be zero meaning
7496 this definition is too screwy to try to parse.
7497 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7498 handle member functions (which have FIELD context).
7499 Return value may be zero meaning this definition is too screwy to
7501 PARM for a parameter declaration (either within a function prototype
7502 or before a function body). Make a PARM_DECL, or return void_type_node.
7503 CATCHPARM for a parameter declaration before a catch clause.
7504 TYPENAME if for a typename (in a cast or sizeof).
7505 Don't make a DECL node; just return the ..._TYPE node.
7506 FIELD for a struct or union field; make a FIELD_DECL.
7507 BITFIELD for a field with specified width.
7508 INITIALIZED is as for start_decl.
7510 ATTRLIST is a pointer to the list of attributes, which may be NULL
7511 if there are none; *ATTRLIST may be modified if attributes from inside
7512 the declarator should be applied to the declaration.
7514 When this function is called, scoping variables (such as
7515 CURRENT_CLASS_TYPE) should reflect the scope in which the
7516 declaration occurs, not the scope in which the new declaration will
7517 be placed. For example, on:
7521 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7524 Returns a DECL (if a declarator is present), a TYPE (if there is no
7525 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7529 grokdeclarator (const cp_declarator *declarator,
7530 const cp_decl_specifier_seq *declspecs,
7531 enum decl_context decl_context,
7535 tree type = NULL_TREE;
7537 int virtualp, explicitp, friendp, inlinep, staticp;
7538 int explicit_int = 0;
7539 int explicit_char = 0;
7540 int defaulted_int = 0;
7541 tree dependent_name = NULL_TREE;
7543 tree typedef_decl = NULL_TREE;
7544 const char *name = NULL;
7545 tree typedef_type = NULL_TREE;
7546 /* True if this declarator is a function definition. */
7547 bool funcdef_flag = false;
7548 cp_declarator_kind innermost_code = cdk_error;
7551 /* See the code below that used this. */
7552 tree decl_attr = NULL_TREE;
7555 /* Keep track of what sort of function is being processed
7556 so that we can warn about default return values, or explicit
7557 return values which do not match prescribed defaults. */
7558 special_function_kind sfk = sfk_none;
7560 tree dname = NULL_TREE;
7561 tree ctor_return_type = NULL_TREE;
7562 enum overload_flags flags = NO_SPECIAL;
7563 /* cv-qualifiers that apply to the declarator, for a declaration of
7564 a member function. */
7565 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7566 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7568 tree raises = NULL_TREE;
7569 int template_count = 0;
7570 tree returned_attrs = NULL_TREE;
7571 tree parms = NULL_TREE;
7572 const cp_declarator *id_declarator;
7573 /* The unqualified name of the declarator; either an
7574 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7575 tree unqualified_id;
7576 /* The class type, if any, in which this entity is located,
7577 or NULL_TREE if none. Note that this value may be different from
7578 the current class type; for example if an attempt is made to declare
7579 "A::f" inside "B", this value will be "A". */
7580 tree ctype = current_class_type;
7581 /* The NAMESPACE_DECL for the namespace in which this entity is
7582 located. If an unqualified name is used to declare the entity,
7583 this value will be NULL_TREE, even if the entity is located at
7585 tree in_namespace = NULL_TREE;
7586 cp_storage_class storage_class;
7587 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7588 bool type_was_error_mark_node = false;
7589 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7590 bool template_type_arg = false;
7593 signed_p = declspecs->specs[(int)ds_signed];
7594 unsigned_p = declspecs->specs[(int)ds_unsigned];
7595 short_p = declspecs->specs[(int)ds_short];
7596 long_p = declspecs->specs[(int)ds_long];
7597 longlong = declspecs->specs[(int)ds_long] >= 2;
7598 thread_p = declspecs->specs[(int)ds_thread];
7600 if (decl_context == FUNCDEF)
7601 funcdef_flag = true, decl_context = NORMAL;
7602 else if (decl_context == MEMFUNCDEF)
7603 funcdef_flag = true, decl_context = FIELD;
7604 else if (decl_context == BITFIELD)
7605 bitfield = 1, decl_context = FIELD;
7606 else if (decl_context == TEMPLATE_TYPE_ARG)
7607 template_type_arg = true, decl_context = TYPENAME;
7609 if (initialized > 1)
7610 funcdef_flag = true;
7612 /* Look inside a declarator for the name being declared
7613 and get it as a string, for an error message. */
7614 for (id_declarator = declarator;
7616 id_declarator = id_declarator->declarator)
7618 if (id_declarator->kind != cdk_id)
7619 innermost_code = id_declarator->kind;
7621 switch (id_declarator->kind)
7624 if (id_declarator->declarator
7625 && id_declarator->declarator->kind == cdk_id)
7627 sfk = id_declarator->declarator->u.id.sfk;
7628 if (sfk == sfk_destructor)
7635 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7636 tree decl = id_declarator->u.id.unqualified_name;
7639 if (qualifying_scope)
7641 if (at_function_scope_p ())
7645 A declarator-id shall not be qualified except
7648 None of the cases are permitted in block
7650 if (qualifying_scope == global_namespace)
7651 error ("invalid use of qualified-name %<::%D%>",
7653 else if (TYPE_P (qualifying_scope))
7654 error ("invalid use of qualified-name %<%T::%D%>",
7655 qualifying_scope, decl);
7657 error ("invalid use of qualified-name %<%D::%D%>",
7658 qualifying_scope, decl);
7659 return error_mark_node;
7661 else if (TYPE_P (qualifying_scope))
7663 ctype = qualifying_scope;
7664 if (innermost_code != cdk_function
7665 && current_class_type
7666 && !UNIQUELY_DERIVED_FROM_P (ctype,
7667 current_class_type))
7669 error ("type %qT is not derived from type %qT",
7670 ctype, current_class_type);
7671 return error_mark_node;
7674 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7675 in_namespace = qualifying_scope;
7677 switch (TREE_CODE (decl))
7683 if (innermost_code != cdk_function)
7685 error ("declaration of %qD as non-function", decl);
7686 return error_mark_node;
7688 else if (!qualifying_scope
7689 && !(current_class_type && at_class_scope_p ()))
7691 error ("declaration of %qD as non-member", decl);
7692 return error_mark_node;
7695 type = TREE_OPERAND (decl, 0);
7697 type = constructor_name (type);
7698 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7703 case TEMPLATE_ID_EXPR:
7705 tree fns = TREE_OPERAND (decl, 0);
7708 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7710 gcc_assert (is_overloaded_fn (dname));
7711 dname = DECL_NAME (get_first_fn (dname));
7716 case IDENTIFIER_NODE:
7717 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7720 if (C_IS_RESERVED_WORD (dname))
7722 error ("declarator-id missing; using reserved word %qD",
7724 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7726 else if (!IDENTIFIER_TYPENAME_P (dname))
7727 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7730 gcc_assert (flags == NO_SPECIAL);
7731 flags = TYPENAME_FLAG;
7732 ctor_return_type = TREE_TYPE (dname);
7733 sfk = sfk_conversion;
7734 if (is_typename_at_global_scope (dname))
7735 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7737 name = "<invalid operator>";
7754 return error_mark_node;
7759 if (id_declarator->kind == cdk_id)
7765 The declarator in a function-definition shall have the form
7766 D1 ( parameter-declaration-clause) ... */
7767 if (funcdef_flag && innermost_code != cdk_function)
7769 error ("function definition does not declare parameters");
7770 return error_mark_node;
7773 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7774 && innermost_code != cdk_function
7775 && ! (ctype && !declspecs->any_specifiers_p))
7777 error ("declaration of %qD as non-function", dname);
7778 return error_mark_node;
7781 /* Anything declared one level down from the top level
7782 must be one of the parameters of a function
7783 (because the body is at least two levels down). */
7785 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7786 by not allowing C++ class definitions to specify their parameters
7787 with xdecls (must be spec.d in the parmlist).
7789 Since we now wait to push a class scope until we are sure that
7790 we are in a legitimate method context, we must set oldcname
7791 explicitly (since current_class_name is not yet alive).
7793 We also want to avoid calling this a PARM if it is in a namespace. */
7795 if (decl_context == NORMAL && !toplevel_bindings_p ())
7797 struct cp_binding_level *b = current_binding_level;
7798 current_binding_level = b->level_chain;
7799 if (current_binding_level != 0 && toplevel_bindings_p ())
7800 decl_context = PARM;
7801 current_binding_level = b;
7805 name = decl_context == PARM ? "parameter" : "type name";
7807 /* If there were multiple types specified in the decl-specifier-seq,
7808 issue an error message. */
7809 if (declspecs->multiple_types_p)
7811 error ("two or more data types in declaration of %qs", name);
7812 return error_mark_node;
7815 if (declspecs->conflicting_specifiers_p)
7817 error ("conflicting specifiers in declaration of %qs", name);
7818 return error_mark_node;
7821 /* Extract the basic type from the decl-specifier-seq. */
7822 type = declspecs->type;
7823 if (type == error_mark_node)
7826 type_was_error_mark_node = true;
7828 /* If the entire declaration is itself tagged as deprecated then
7829 suppress reports of deprecated items. */
7830 if (type && TREE_DEPRECATED (type)
7831 && deprecated_state != DEPRECATED_SUPPRESS)
7832 warn_deprecated_use (type, NULL_TREE);
7833 if (type && TREE_CODE (type) == TYPE_DECL)
7835 typedef_decl = type;
7836 type = TREE_TYPE (typedef_decl);
7837 if (TREE_DEPRECATED (type)
7838 && DECL_ARTIFICIAL (typedef_decl)
7839 && deprecated_state != DEPRECATED_SUPPRESS)
7840 warn_deprecated_use (type, NULL_TREE);
7842 /* No type at all: default to `int', and set DEFAULTED_INT
7843 because it was not a user-defined typedef. */
7844 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7846 /* These imply 'int'. */
7847 type = integer_type_node;
7851 explicit_int = declspecs->explicit_int_p;
7852 explicit_char = declspecs->explicit_char_p;
7855 /* See the code below that used this. */
7857 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7859 typedef_type = type;
7862 if (sfk != sfk_conversion)
7863 ctor_return_type = ctype;
7865 if (sfk != sfk_none)
7866 type = check_special_function_return_type (sfk, type,
7868 else if (type == NULL_TREE)
7874 /* We handle `main' specially here, because 'main () { }' is so
7875 common. With no options, it is allowed. With -Wreturn-type,
7876 it is a warning. It is only an error with -pedantic-errors. */
7877 is_main = (funcdef_flag
7878 && dname && MAIN_NAME_P (dname)
7879 && ctype == NULL_TREE
7880 && in_namespace == NULL_TREE
7881 && current_namespace == global_namespace);
7883 if (type_was_error_mark_node)
7884 /* We've already issued an error, don't complain more. */;
7885 else if (in_system_header || flag_ms_extensions)
7886 /* Allow it, sigh. */;
7888 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7890 pedwarn (input_location, OPT_pedantic,
7891 "ISO C++ forbids declaration of %qs with no type", name);
7893 warning (OPT_Wreturn_type,
7894 "ISO C++ forbids declaration of %qs with no type", name);
7896 type = integer_type_node;
7901 /* Now process the modifiers that were specified
7902 and check for invalid combinations. */
7904 /* Long double is a special combination. */
7905 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7908 type = build_qualified_type (long_double_type_node,
7909 cp_type_quals (type));
7912 /* Check all other uses of type modifiers. */
7914 if (unsigned_p || signed_p || long_p || short_p)
7918 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7919 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7920 else if (signed_p && unsigned_p)
7921 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7922 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7923 error ("%<long long%> invalid for %qs", name);
7924 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7925 error ("%<long%> invalid for %qs", name);
7926 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7927 error ("%<short%> invalid for %qs", name);
7928 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7929 error ("%<long%> or %<short%> invalid for %qs", name);
7930 else if ((long_p || short_p) && explicit_char)
7931 error ("%<long%> or %<short%> specified with char for %qs", name);
7932 else if (long_p && short_p)
7933 error ("%<long%> and %<short%> specified together for %qs", name);
7934 else if (type == char16_type_node || type == char32_type_node)
7936 if (signed_p || unsigned_p)
7937 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7938 else if (short_p || long_p)
7939 error ("%<short%> or %<long%> invalid for %qs", name);
7944 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7946 pedwarn (input_location, OPT_pedantic,
7947 "long, short, signed or unsigned used invalidly for %qs",
7949 if (flag_pedantic_errors)
7954 /* Discard the type modifiers if they are invalid. */
7965 /* Decide whether an integer type is signed or not.
7966 Optionally treat bitfields as signed by default. */
7970 It is implementation-defined whether a plain (neither
7971 explicitly signed or unsigned) char, short, int, or long
7972 bit-field is signed or unsigned.
7974 Naturally, we extend this to long long as well. Note that
7975 this does not include wchar_t. */
7976 || (bitfield && !flag_signed_bitfields
7978 /* A typedef for plain `int' without `signed' can be
7979 controlled just like plain `int', but a typedef for
7980 `signed int' cannot be so controlled. */
7982 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7983 && TREE_CODE (type) == INTEGER_TYPE
7984 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7987 type = long_long_unsigned_type_node;
7989 type = long_unsigned_type_node;
7991 type = short_unsigned_type_node;
7992 else if (type == char_type_node)
7993 type = unsigned_char_type_node;
7994 else if (typedef_decl)
7995 type = unsigned_type_for (type);
7997 type = unsigned_type_node;
7999 else if (signed_p && type == char_type_node)
8000 type = signed_char_type_node;
8002 type = long_long_integer_type_node;
8004 type = long_integer_type_node;
8006 type = short_integer_type_node;
8008 if (declspecs->specs[(int)ds_complex])
8010 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8011 error ("complex invalid for %qs", name);
8012 /* If we just have "complex", it is equivalent to
8013 "complex double", but if any modifiers at all are specified it is
8014 the complex form of TYPE. E.g, "complex short" is
8015 "complex short int". */
8017 else if (defaulted_int && ! longlong
8018 && ! (long_p || short_p || signed_p || unsigned_p))
8019 type = complex_double_type_node;
8020 else if (type == integer_type_node)
8021 type = complex_integer_type_node;
8022 else if (type == float_type_node)
8023 type = complex_float_type_node;
8024 else if (type == double_type_node)
8025 type = complex_double_type_node;
8026 else if (type == long_double_type_node)
8027 type = complex_long_double_type_node;
8029 type = build_complex_type (type);
8032 type_quals = TYPE_UNQUALIFIED;
8033 if (declspecs->specs[(int)ds_const])
8034 type_quals |= TYPE_QUAL_CONST;
8035 if (declspecs->specs[(int)ds_volatile])
8036 type_quals |= TYPE_QUAL_VOLATILE;
8037 if (declspecs->specs[(int)ds_restrict])
8038 type_quals |= TYPE_QUAL_RESTRICT;
8039 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8040 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8043 if (TREE_CODE (type) == FUNCTION_TYPE
8044 && type_quals != TYPE_UNQUALIFIED)
8046 /* This was an error in C++98 (cv-qualifiers cannot be added to
8047 a function type), but DR 295 makes the code well-formed by
8048 dropping the extra qualifiers. */
8051 tree bad_type = build_qualified_type (type, type_quals);
8052 pedwarn (input_location, OPT_pedantic,
8053 "ignoring %qV qualifiers added to function type %qT",
8056 type_quals = TYPE_UNQUALIFIED;
8058 type_quals |= cp_type_quals (type);
8059 type = cp_build_qualified_type_real
8060 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8061 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8062 /* We might have ignored or rejected some of the qualifiers. */
8063 type_quals = cp_type_quals (type);
8066 inlinep = !! declspecs->specs[(int)ds_inline];
8067 virtualp = !! declspecs->specs[(int)ds_virtual];
8068 explicitp = !! declspecs->specs[(int)ds_explicit];
8070 storage_class = declspecs->storage_class;
8071 if (storage_class == sc_static)
8072 staticp = 1 + (decl_context == FIELD);
8074 if (virtualp && staticp == 2)
8076 error ("member %qD cannot be declared both virtual and static", dname);
8077 storage_class = sc_none;
8080 friendp = !! declspecs->specs[(int)ds_friend];
8082 if (dependent_name && !friendp)
8084 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8085 return error_mark_node;
8088 /* Issue errors about use of storage classes for parameters. */
8089 if (decl_context == PARM)
8091 if (declspecs->specs[(int)ds_typedef])
8093 error ("typedef declaration invalid in parameter declaration");
8094 return error_mark_node;
8096 else if (storage_class == sc_static
8097 || storage_class == sc_extern
8099 error ("storage class specifiers invalid in parameter declarations");
8101 if (type_uses_auto (type))
8103 error ("parameter declared %<auto%>");
8104 type = error_mark_node;
8108 /* Give error if `virtual' is used outside of class declaration. */
8110 && (current_class_name == NULL_TREE || decl_context != FIELD))
8112 error ("%<virtual%> outside class declaration");
8116 /* Static anonymous unions are dealt with here. */
8117 if (staticp && decl_context == TYPENAME
8119 && ANON_AGGR_TYPE_P (declspecs->type))
8120 decl_context = FIELD;
8122 /* Warn about storage classes that are invalid for certain
8123 kinds of declarations (parameters, typenames, etc.). */
8126 && storage_class != sc_extern
8127 && storage_class != sc_static)
8128 || declspecs->specs[(int)ds_typedef]))
8130 error ("multiple storage classes in declaration of %qs", name);
8133 if (decl_context != NORMAL
8134 && ((storage_class != sc_none
8135 && storage_class != sc_mutable)
8138 if ((decl_context == PARM || decl_context == CATCHPARM)
8139 && (storage_class == sc_register
8140 || storage_class == sc_auto))
8142 else if (declspecs->specs[(int)ds_typedef])
8144 else if (decl_context == FIELD
8145 /* C++ allows static class elements. */
8146 && storage_class == sc_static)
8147 /* C++ also allows inlines and signed and unsigned elements,
8148 but in those cases we don't come in here. */
8152 if (decl_context == FIELD)
8153 error ("storage class specified for %qs", name);
8156 if (decl_context == PARM || decl_context == CATCHPARM)
8157 error ("storage class specified for parameter %qs", name);
8159 error ("storage class specified for typename");
8161 if (storage_class == sc_register
8162 || storage_class == sc_auto
8163 || storage_class == sc_extern
8165 storage_class = sc_none;
8168 else if (storage_class == sc_extern && funcdef_flag
8169 && ! toplevel_bindings_p ())
8170 error ("nested function %qs declared %<extern%>", name);
8171 else if (toplevel_bindings_p ())
8173 if (storage_class == sc_auto)
8174 error ("top-level declaration of %qs specifies %<auto%>", name);
8177 && storage_class != sc_extern
8178 && storage_class != sc_static)
8180 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8185 if (storage_class && friendp)
8187 error ("storage class specifiers invalid in friend function declarations");
8188 storage_class = sc_none;
8193 unqualified_id = NULL_TREE;
8196 unqualified_id = id_declarator->u.id.unqualified_name;
8197 switch (TREE_CODE (unqualified_id))
8200 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8201 if (TYPE_P (unqualified_id))
8202 unqualified_id = constructor_name (unqualified_id);
8205 case IDENTIFIER_NODE:
8206 case TEMPLATE_ID_EXPR:
8214 /* Determine the type of the entity declared by recurring on the
8216 for (; declarator; declarator = declarator->declarator)
8218 const cp_declarator *inner_declarator;
8221 if (type == error_mark_node)
8222 return error_mark_node;
8224 attrs = declarator->attributes;
8230 if (declarator == NULL || declarator->kind == cdk_id)
8231 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8232 if (declarator->kind == cdk_function)
8233 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8234 if (declarator->kind == cdk_array)
8235 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8236 returned_attrs = decl_attributes (&type,
8237 chainon (returned_attrs, attrs),
8241 if (declarator->kind == cdk_id)
8244 inner_declarator = declarator->declarator;
8246 switch (declarator->kind)
8249 type = create_array_type_for_decl (dname, type,
8250 declarator->u.array.bounds);
8258 /* Declaring a function type.
8259 Make sure we have a valid type for the function to return. */
8261 if (type_quals != TYPE_UNQUALIFIED)
8263 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8264 warning (OPT_Wignored_qualifiers,
8265 "type qualifiers ignored on function return type");
8266 /* We now know that the TYPE_QUALS don't apply to the
8267 decl, but to its return type. */
8268 type_quals = TYPE_UNQUALIFIED;
8270 errmsg = targetm.invalid_return_type (type);
8274 type = integer_type_node;
8277 /* Error about some types functions can't return. */
8279 if (TREE_CODE (type) == FUNCTION_TYPE)
8281 error ("%qs declared as function returning a function", name);
8282 return error_mark_node;
8284 if (TREE_CODE (type) == ARRAY_TYPE)
8286 error ("%qs declared as function returning an array", name);
8287 return error_mark_node;
8290 /* Pick up type qualifiers which should be applied to `this'. */
8291 memfn_quals = declarator->u.function.qualifiers;
8293 /* Pick up the exception specifications. */
8294 raises = declarator->u.function.exception_specification;
8296 /* Say it's a definition only for the CALL_EXPR
8297 closest to the identifier. */
8298 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8300 /* Handle a late-specified return type. */
8303 if (type_uses_auto (type))
8305 if (!declarator->u.function.late_return_type)
8307 error ("%qs function uses %<auto%> type specifier without"
8308 " late return type", name);
8309 return error_mark_node;
8311 else if (!is_auto (type))
8313 error ("%qs function with late return type has"
8314 " %qT as its type rather than plain %<auto%>",
8316 return error_mark_node;
8319 else if (declarator->u.function.late_return_type)
8321 error ("%qs function with late return type not declared"
8322 " with %<auto%> type specifier", name);
8323 return error_mark_node;
8326 type = splice_late_return_type
8327 (type, declarator->u.function.late_return_type);
8328 if (type == error_mark_node)
8329 return error_mark_node;
8331 if (ctype == NULL_TREE
8332 && decl_context == FIELD
8334 && (friendp == 0 || dname == current_class_name))
8335 ctype = current_class_type;
8337 if (ctype && (sfk == sfk_constructor
8338 || sfk == sfk_destructor))
8340 /* We are within a class's scope. If our declarator name
8341 is the same as the class name, and we are defining
8342 a function, then it is a constructor/destructor, and
8343 therefore returns a void type. */
8345 /* ISO C++ 12.4/2. A destructor may not be declared
8346 const or volatile. A destructor may not be
8349 ISO C++ 12.1. A constructor may not be declared
8350 const or volatile. A constructor may not be
8351 virtual. A constructor may not be static. */
8353 error ((flags == DTOR_FLAG)
8354 ? "destructor cannot be static member function"
8355 : "constructor cannot be static member function");
8358 error ((flags == DTOR_FLAG)
8359 ? "destructors may not be cv-qualified"
8360 : "constructors may not be cv-qualified");
8361 memfn_quals = TYPE_UNQUALIFIED;
8364 if (decl_context == FIELD
8365 && !member_function_or_else (ctype,
8368 return error_mark_node;
8370 if (flags != DTOR_FLAG)
8372 /* It's a constructor. */
8377 permerror (input_location, "constructors cannot be declared virtual");
8380 if (decl_context == FIELD
8381 && sfk != sfk_constructor)
8382 return error_mark_node;
8384 if (decl_context == FIELD)
8390 error ("can't initialize friend function %qs", name);
8393 /* Cannot be both friend and virtual. */
8394 error ("virtual functions cannot be friends");
8397 if (decl_context == NORMAL)
8398 error ("friend declaration not in class definition");
8399 if (current_function_decl && funcdef_flag)
8400 error ("can't define friend function %qs in a local "
8404 else if (ctype && sfk == sfk_conversion)
8408 maybe_warn_cpp0x ("explicit conversion operators");
8413 arg_types = grokparms (declarator->u.function.parameters,
8416 if (inner_declarator
8417 && inner_declarator->kind == cdk_id
8418 && inner_declarator->u.id.sfk == sfk_destructor
8419 && arg_types != void_list_node)
8421 error ("destructors may not have parameters");
8422 arg_types = void_list_node;
8426 type = build_function_type (type, arg_types);
8433 /* Filter out pointers-to-references and references-to-references.
8434 We can get these if a TYPE_DECL is used. */
8436 if (TREE_CODE (type) == REFERENCE_TYPE)
8438 if (declarator->kind != cdk_reference)
8440 error ("cannot declare pointer to %q#T", type);
8441 type = TREE_TYPE (type);
8444 /* In C++0x, we allow reference to reference declarations
8445 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8446 and template type arguments [14.3.1/4 temp.arg.type]. The
8447 check for direct reference to reference declarations, which
8448 are still forbidden, occurs below. Reasoning behind the change
8449 can be found in DR106, DR540, and the rvalue reference
8451 else if (cxx_dialect == cxx98)
8453 error ("cannot declare reference to %q#T", type);
8454 type = TREE_TYPE (type);
8457 else if (VOID_TYPE_P (type))
8459 if (declarator->kind == cdk_reference)
8460 error ("cannot declare reference to %q#T", type);
8461 else if (declarator->kind == cdk_ptrmem)
8462 error ("cannot declare pointer to %q#T member", type);
8465 /* We now know that the TYPE_QUALS don't apply to the decl,
8466 but to the target of the pointer. */
8467 type_quals = TYPE_UNQUALIFIED;
8469 if (declarator->kind == cdk_ptrmem
8470 && (TREE_CODE (type) == FUNCTION_TYPE
8471 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8473 memfn_quals |= cp_type_quals (type);
8474 type = build_memfn_type (type,
8475 declarator->u.pointer.class_type,
8477 memfn_quals = TYPE_UNQUALIFIED;
8480 if (TREE_CODE (type) == FUNCTION_TYPE
8481 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8482 error ("cannot declare %s to qualified function type %qT",
8483 declarator->kind == cdk_reference ? "reference" : "pointer",
8486 if (declarator->kind == cdk_reference)
8488 /* In C++0x, the type we are creating a reference to might be
8489 a typedef which is itself a reference type. In that case,
8490 we follow the reference collapsing rules in
8491 [7.1.3/8 dcl.typedef] to create the final reference type:
8493 "If a typedef TD names a type that is a reference to a type
8494 T, an attempt to create the type 'lvalue reference to cv TD'
8495 creates the type 'lvalue reference to T,' while an attempt
8496 to create the type "rvalue reference to cv TD' creates the
8499 if (!VOID_TYPE_P (type))
8500 type = cp_build_reference_type
8501 ((TREE_CODE (type) == REFERENCE_TYPE
8502 ? TREE_TYPE (type) : type),
8503 (declarator->u.reference.rvalue_ref
8504 && (TREE_CODE(type) != REFERENCE_TYPE
8505 || TYPE_REF_IS_RVALUE (type))));
8507 /* In C++0x, we need this check for direct reference to
8508 reference declarations, which are forbidden by
8509 [8.3.2/5 dcl.ref]. Reference to reference declarations
8510 are only allowed indirectly through typedefs and template
8511 type arguments. Example:
8513 void foo(int & &); // invalid ref-to-ref decl
8515 typedef int & int_ref;
8516 void foo(int_ref &); // valid ref-to-ref decl
8518 if (inner_declarator && inner_declarator->kind == cdk_reference)
8519 error ("cannot declare reference to %q#T, which is not "
8520 "a typedef or a template type argument", type);
8522 else if (TREE_CODE (type) == METHOD_TYPE)
8523 type = build_ptrmemfunc_type (build_pointer_type (type));
8524 else if (declarator->kind == cdk_ptrmem)
8526 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8528 if (declarator->u.pointer.class_type == error_mark_node)
8529 /* We will already have complained. */
8530 type = error_mark_node;
8532 type = build_ptrmem_type (declarator->u.pointer.class_type,
8536 type = build_pointer_type (type);
8538 /* Process a list of type modifier keywords (such as
8539 const or volatile) that were given inside the `*' or `&'. */
8541 if (declarator->u.pointer.qualifiers)
8544 = cp_build_qualified_type (type,
8545 declarator->u.pointer.qualifiers);
8546 type_quals = cp_type_quals (type);
8559 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8560 && TREE_CODE (type) != FUNCTION_TYPE
8561 && TREE_CODE (type) != METHOD_TYPE)
8563 error ("template-id %qD used as a declarator",
8565 unqualified_id = dname;
8568 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8569 qualified with a class-name, turn it into a METHOD_TYPE, unless
8570 we know that the function is static. We take advantage of this
8571 opportunity to do other processing that pertains to entities
8572 explicitly declared to be class members. Note that if DECLARATOR
8573 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8574 would not have exited the loop above. */
8576 && declarator->u.id.qualifying_scope
8577 && TYPE_P (declarator->u.id.qualifying_scope))
8581 ctype = declarator->u.id.qualifying_scope;
8582 ctype = TYPE_MAIN_VARIANT (ctype);
8584 while (t != NULL_TREE && CLASS_TYPE_P (t))
8586 /* You're supposed to have one `template <...>' for every
8587 template class, but you don't need one for a full
8588 specialization. For example:
8590 template <class T> struct S{};
8591 template <> struct S<int> { void f(); };
8592 void S<int>::f () {}
8594 is correct; there shouldn't be a `template <>' for the
8595 definition of `S<int>::f'. */
8596 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8597 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8598 /* T is an explicit (not partial) specialization. All
8599 containing classes must therefore also be explicitly
8602 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8603 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8604 template_count += 1;
8606 t = TYPE_MAIN_DECL (t);
8607 t = DECL_CONTEXT (t);
8610 if (ctype == current_class_type)
8614 permerror (input_location, "member functions are implicitly friends of their class");
8618 permerror (declarator->id_loc,
8619 "extra qualification %<%T::%> on member %qs",
8622 else if (/* If the qualifying type is already complete, then we
8623 can skip the following checks. */
8624 !COMPLETE_TYPE_P (ctype)
8625 && (/* If the function is being defined, then
8626 qualifying type must certainly be complete. */
8628 /* A friend declaration of "T::f" is OK, even if
8629 "T" is a template parameter. But, if this
8630 function is not a friend, the qualifying type
8632 || (!friendp && !CLASS_TYPE_P (ctype))
8633 /* For a declaration, the type need not be
8634 complete, if either it is dependent (since there
8635 is no meaningful definition of complete in that
8636 case) or the qualifying class is currently being
8638 || !(dependent_type_p (ctype)
8639 || currently_open_class (ctype)))
8640 /* Check that the qualifying type is complete. */
8641 && !complete_type_or_else (ctype, NULL_TREE))
8642 return error_mark_node;
8643 else if (TREE_CODE (type) == FUNCTION_TYPE)
8645 tree sname = declarator->u.id.unqualified_name;
8647 if (current_class_type
8648 && (!friendp || funcdef_flag))
8651 ? "cannot define member function %<%T::%s%> within %<%T%>"
8652 : "cannot declare member function %<%T::%s%> within %<%T%>",
8653 ctype, name, current_class_type);
8654 return error_mark_node;
8657 if (TREE_CODE (sname) == IDENTIFIER_NODE
8658 && NEW_DELETE_OPNAME_P (sname))
8659 /* Overloaded operator new and operator delete
8660 are always static functions. */
8663 type = build_memfn_type (type, ctype, memfn_quals);
8665 else if (declspecs->specs[(int)ds_typedef]
8666 && current_class_type)
8668 error ("cannot declare member %<%T::%s%> within %qT",
8669 ctype, name, current_class_type);
8670 return error_mark_node;
8674 /* Now TYPE has the actual type. */
8679 *attrlist = chainon (returned_attrs, *attrlist);
8681 attrlist = &returned_attrs;
8684 /* Handle parameter packs. */
8685 if (parameter_pack_p)
8687 if (decl_context == PARM)
8688 /* Turn the type into a pack expansion.*/
8689 type = make_pack_expansion (type);
8691 error ("non-parameter %qs cannot be a parameter pack", name);
8694 /* Did array size calculations overflow? */
8696 if (TREE_CODE (type) == ARRAY_TYPE
8697 && COMPLETE_TYPE_P (type)
8698 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8699 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8701 error ("size of array %qs is too large", name);
8702 /* If we proceed with the array type as it is, we'll eventually
8703 crash in tree_low_cst(). */
8704 type = error_mark_node;
8707 if ((decl_context == FIELD || decl_context == PARM)
8708 && !processing_template_decl
8709 && variably_modified_type_p (type, NULL_TREE))
8711 if (decl_context == FIELD)
8712 error ("data member may not have variably modified type %qT", type);
8714 error ("parameter may not have variably modified type %qT", type);
8715 type = error_mark_node;
8718 if (explicitp == 1 || (explicitp && friendp))
8720 /* [dcl.fct.spec] The explicit specifier shall only be used in
8721 declarations of constructors within a class definition. */
8722 error ("only declarations of constructors can be %<explicit%>");
8726 if (storage_class == sc_mutable)
8728 if (decl_context != FIELD || friendp)
8730 error ("non-member %qs cannot be declared %<mutable%>", name);
8731 storage_class = sc_none;
8733 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8735 error ("non-object member %qs cannot be declared %<mutable%>", name);
8736 storage_class = sc_none;
8738 else if (TREE_CODE (type) == FUNCTION_TYPE
8739 || TREE_CODE (type) == METHOD_TYPE)
8741 error ("function %qs cannot be declared %<mutable%>", name);
8742 storage_class = sc_none;
8746 error ("static %qs cannot be declared %<mutable%>", name);
8747 storage_class = sc_none;
8749 else if (type_quals & TYPE_QUAL_CONST)
8751 error ("const %qs cannot be declared %<mutable%>", name);
8752 storage_class = sc_none;
8756 /* If this is declaring a typedef name, return a TYPE_DECL. */
8757 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8761 /* Note that the grammar rejects storage classes
8762 in typenames, fields or parameters. */
8763 if (current_lang_name == lang_name_java)
8764 TYPE_FOR_JAVA (type) = 1;
8766 /* This declaration:
8768 typedef void f(int) const;
8770 declares a function type which is not a member of any
8771 particular class, but which is cv-qualified; for
8772 example "f S::*" declares a pointer to a const-qualified
8773 member function of S. We record the cv-qualification in the
8775 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8777 type = cp_build_qualified_type (type, memfn_quals);
8779 /* We have now dealt with these qualifiers. */
8780 memfn_quals = TYPE_UNQUALIFIED;
8783 if (decl_context == FIELD)
8784 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8786 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8787 if (id_declarator && declarator->u.id.qualifying_scope) {
8788 error_at (DECL_SOURCE_LOCATION (decl),
8789 "typedef name may not be a nested-name-specifier");
8790 TREE_TYPE (decl) = error_mark_node;
8793 if (decl_context != FIELD)
8795 if (!current_function_decl)
8796 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8797 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8798 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8799 (current_function_decl)))
8800 /* The TYPE_DECL is "abstract" because there will be
8801 clones of this constructor/destructor, and there will
8802 be copies of this TYPE_DECL generated in those
8804 DECL_ABSTRACT (decl) = 1;
8806 else if (constructor_name_p (unqualified_id, current_class_type))
8807 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8808 "as enclosing class",
8811 /* If the user declares "typedef struct {...} foo" then the
8812 struct will have an anonymous name. Fill that name in now.
8813 Nothing can refer to it, so nothing needs know about the name
8815 if (type != error_mark_node
8818 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8819 && TYPE_ANONYMOUS_P (type)
8820 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8824 /* Replace the anonymous name with the real name everywhere. */
8825 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8827 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8829 debug_hooks->set_name (t, decl);
8830 TYPE_NAME (t) = decl;
8834 if (TYPE_LANG_SPECIFIC (type))
8835 TYPE_WAS_ANONYMOUS (type) = 1;
8837 /* If this is a typedef within a template class, the nested
8838 type is a (non-primary) template. The name for the
8839 template needs updating as well. */
8840 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8841 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8842 = TYPE_IDENTIFIER (type);
8844 /* FIXME remangle member functions; member functions of a
8845 type with external linkage have external linkage. */
8849 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8850 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8852 bad_specifiers (decl, "type", virtualp,
8853 memfn_quals != TYPE_UNQUALIFIED,
8854 inlinep, friendp, raises != NULL_TREE);
8859 /* Detect the case of an array type of unspecified size
8860 which came, as such, direct from a typedef name.
8861 We must copy the type, so that the array's domain can be
8862 individually set by the object's initializer. */
8864 if (type && typedef_type
8865 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8866 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8867 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8869 /* Detect where we're using a typedef of function type to declare a
8870 function. PARMS will not be set, so we must create it now. */
8872 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8874 tree decls = NULL_TREE;
8877 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8879 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8881 TREE_CHAIN (decl) = decls;
8885 parms = nreverse (decls);
8887 if (decl_context != TYPENAME)
8889 /* A cv-qualifier-seq shall only be part of the function type
8890 for a non-static member function. [8.3.5/4 dcl.fct] */
8891 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8892 && (current_class_type == NULL_TREE || staticp) )
8895 ? G_("qualified function types cannot be used to "
8896 "declare static member functions")
8897 : G_("qualified function types cannot be used to "
8898 "declare free functions"));
8899 type = TYPE_MAIN_VARIANT (type);
8902 /* The qualifiers on the function type become the qualifiers on
8903 the non-static member function. */
8904 memfn_quals |= cp_type_quals (type);
8908 /* If this is a type name (such as, in a cast or sizeof),
8909 compute the type and return it now. */
8911 if (decl_context == TYPENAME)
8913 /* Note that the grammar rejects storage classes
8914 in typenames, fields or parameters. */
8915 if (type_quals != TYPE_UNQUALIFIED)
8916 type_quals = TYPE_UNQUALIFIED;
8918 /* Special case: "friend class foo" looks like a TYPENAME context. */
8921 if (type_quals != TYPE_UNQUALIFIED)
8923 error ("type qualifiers specified for friend class declaration");
8924 type_quals = TYPE_UNQUALIFIED;
8928 error ("%<inline%> specified for friend class declaration");
8934 /* Don't allow friend declaration without a class-key. */
8935 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8936 permerror (input_location, "template parameters cannot be friends");
8937 else if (TREE_CODE (type) == TYPENAME_TYPE)
8938 permerror (input_location, "friend declaration requires class-key, "
8939 "i.e. %<friend class %T::%D%>",
8940 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8942 permerror (input_location, "friend declaration requires class-key, "
8943 "i.e. %<friend %#T%>",
8947 /* Only try to do this stuff if we didn't already give up. */
8948 if (type != integer_type_node)
8950 /* A friendly class? */
8951 if (current_class_type)
8952 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8955 error ("trying to make class %qT a friend of global scope",
8958 type = void_type_node;
8961 else if (memfn_quals)
8963 if (ctype == NULL_TREE
8964 && TREE_CODE (type) == METHOD_TYPE)
8965 ctype = TYPE_METHOD_BASETYPE (type);
8968 type = build_memfn_type (type, ctype, memfn_quals);
8969 /* Core issue #547: need to allow this in template type args. */
8970 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8971 type = cp_build_qualified_type (type, memfn_quals);
8973 error ("invalid qualifiers on non-member function type");
8978 else if (unqualified_id == NULL_TREE && decl_context != PARM
8979 && decl_context != CATCHPARM
8980 && TREE_CODE (type) != UNION_TYPE
8983 error ("abstract declarator %qT used as declaration", type);
8984 return error_mark_node;
8987 /* Only functions may be declared using an operator-function-id. */
8989 && IDENTIFIER_OPNAME_P (unqualified_id)
8990 && TREE_CODE (type) != FUNCTION_TYPE
8991 && TREE_CODE (type) != METHOD_TYPE)
8993 error ("declaration of %qD as non-function", unqualified_id);
8994 return error_mark_node;
8997 /* We don't check parameter types here because we can emit a better
8998 error message later. */
8999 if (decl_context != PARM)
9001 type = check_var_type (unqualified_id, type);
9002 if (type == error_mark_node)
9003 return error_mark_node;
9006 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9007 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9009 if (decl_context == PARM || decl_context == CATCHPARM)
9011 if (ctype || in_namespace)
9012 error ("cannot use %<::%> in parameter declaration");
9014 /* A parameter declared as an array of T is really a pointer to T.
9015 One declared as a function is really a pointer to a function.
9016 One declared as a member is really a pointer to member. */
9018 if (TREE_CODE (type) == ARRAY_TYPE)
9020 /* Transfer const-ness of array into that of type pointed to. */
9021 type = build_pointer_type (TREE_TYPE (type));
9022 type_quals = TYPE_UNQUALIFIED;
9024 else if (TREE_CODE (type) == FUNCTION_TYPE)
9025 type = build_pointer_type (type);
9031 if (decl_context == PARM)
9033 decl = cp_build_parm_decl (unqualified_id, type);
9035 bad_specifiers (decl, "parameter", virtualp,
9036 memfn_quals != TYPE_UNQUALIFIED,
9037 inlinep, friendp, raises != NULL_TREE);
9039 else if (decl_context == FIELD)
9041 /* The C99 flexible array extension. */
9042 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9043 && TYPE_DOMAIN (type) == NULL_TREE)
9045 tree itype = compute_array_index_type (dname, integer_zero_node);
9046 type = build_cplus_array_type (TREE_TYPE (type), itype);
9049 if (type == error_mark_node)
9051 /* Happens when declaring arrays of sizes which
9052 are error_mark_node, for example. */
9055 else if (in_namespace && !friendp)
9057 /* Something like struct S { int N::j; }; */
9058 error ("invalid use of %<::%>");
9059 return error_mark_node;
9061 else if (TREE_CODE (type) == FUNCTION_TYPE)
9064 tree function_context;
9068 if (ctype == NULL_TREE)
9069 ctype = current_class_type;
9071 if (ctype == NULL_TREE)
9073 error ("can't make %qD into a method -- not in a class",
9075 return error_mark_node;
9078 /* ``A union may [ ... ] not [ have ] virtual functions.''
9080 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9082 error ("function %qD declared virtual inside a union",
9084 return error_mark_node;
9087 if (NEW_DELETE_OPNAME_P (unqualified_id))
9091 error ("%qD cannot be declared virtual, since it "
9097 else if (staticp < 2)
9098 type = build_memfn_type (type, ctype, memfn_quals);
9101 /* Check that the name used for a destructor makes sense. */
9102 if (sfk == sfk_destructor)
9104 tree uqname = id_declarator->u.id.unqualified_name;
9108 gcc_assert (friendp);
9109 error ("expected qualified name in friend declaration "
9110 "for destructor %qD", uqname);
9111 return error_mark_node;
9114 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9116 error ("declaration of %qD as member of %qT",
9118 return error_mark_node;
9121 else if (sfk == sfk_constructor && friendp)
9123 error ("expected qualified name in friend declaration "
9124 "for constructor %qD",
9125 id_declarator->u.id.unqualified_name);
9126 return error_mark_node;
9129 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9130 function_context = (ctype != NULL_TREE) ?
9131 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9132 publicp = (! friendp || ! staticp)
9133 && function_context == NULL_TREE;
9134 decl = grokfndecl (ctype, type,
9135 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9136 ? unqualified_id : dname,
9139 virtualp, flags, memfn_quals, raises,
9140 friendp ? -1 : 0, friendp, publicp, inlinep,
9142 funcdef_flag, template_count, in_namespace,
9143 attrlist, declarator->id_loc);
9144 if (decl == NULL_TREE)
9145 return error_mark_node;
9147 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9148 /* The decl and setting of decl_attr is also turned off. */
9149 decl = build_decl_attribute_variant (decl, decl_attr);
9152 /* [class.conv.ctor]
9154 A constructor declared without the function-specifier
9155 explicit that can be called with a single parameter
9156 specifies a conversion from the type of its first
9157 parameter to the type of its class. Such a constructor
9158 is called a converting constructor. */
9160 DECL_NONCONVERTING_P (decl) = 1;
9162 else if (TREE_CODE (type) == METHOD_TYPE)
9164 /* We only get here for friend declarations of
9165 members of other classes. */
9166 /* All method decls are public, so tell grokfndecl to set
9167 TREE_PUBLIC, also. */
9168 decl = grokfndecl (ctype, type,
9169 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9170 ? unqualified_id : dname,
9173 virtualp, flags, memfn_quals, raises,
9174 friendp ? -1 : 0, friendp, 1, 0, sfk,
9175 funcdef_flag, template_count, in_namespace,
9177 declarator->id_loc);
9178 if (decl == NULL_TREE)
9179 return error_mark_node;
9181 else if (!staticp && !dependent_type_p (type)
9182 && !COMPLETE_TYPE_P (complete_type (type))
9183 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9186 error ("field %qD has incomplete type", unqualified_id);
9188 error ("name %qT has incomplete type", type);
9190 /* If we're instantiating a template, tell them which
9191 instantiation made the field's type be incomplete. */
9192 if (current_class_type
9193 && TYPE_NAME (current_class_type)
9194 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9196 && declspecs->type == type)
9197 error (" in instantiation of template %qT",
9198 current_class_type);
9200 return error_mark_node;
9206 error ("%qE is neither function nor member function; "
9207 "cannot be declared friend", unqualified_id);
9215 /* Friends are treated specially. */
9216 if (ctype == current_class_type)
9217 ; /* We already issued a permerror. */
9218 else if (decl && DECL_NAME (decl))
9220 if (template_class_depth (current_class_type) == 0)
9222 decl = check_explicit_specialization
9223 (unqualified_id, decl, template_count,
9224 2 * funcdef_flag + 4);
9225 if (decl == error_mark_node)
9226 return error_mark_node;
9229 decl = do_friend (ctype, unqualified_id, decl,
9235 return error_mark_node;
9238 /* Structure field. It may not be a function, except for C++. */
9240 if (decl == NULL_TREE)
9246 /* An attempt is being made to initialize a non-static
9247 member. But, from [class.mem]:
9249 4 A member-declarator can contain a
9250 constant-initializer only if it declares a static
9251 member (_class.static_) of integral or enumeration
9252 type, see _class.static.data_.
9254 This used to be relatively common practice, but
9255 the rest of the compiler does not correctly
9256 handle the initialization unless the member is
9257 static so we make it static below. */
9258 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9260 permerror (input_location, "making %qD static", unqualified_id);
9264 if (uses_template_parms (type))
9265 /* We'll check at instantiation time. */
9267 else if (check_static_variable_definition (unqualified_id,
9269 /* If we just return the declaration, crashes
9270 will sometimes occur. We therefore return
9271 void_type_node, as if this was a friend
9272 declaration, to cause callers to completely
9273 ignore this declaration. */
9274 return error_mark_node;
9279 /* C++ allows static class members. All other work
9280 for this is done by grokfield. */
9281 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9282 set_linkage_for_static_data_member (decl);
9283 /* Even if there is an in-class initialization, DECL
9284 is considered undefined until an out-of-class
9285 definition is provided. */
9286 DECL_EXTERNAL (decl) = 1;
9289 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9293 decl = build_decl (input_location,
9294 FIELD_DECL, unqualified_id, type);
9295 DECL_NONADDRESSABLE_P (decl) = bitfield;
9296 if (bitfield && !unqualified_id)
9297 TREE_NO_WARNING (decl) = 1;
9299 if (storage_class == sc_mutable)
9301 DECL_MUTABLE_P (decl) = 1;
9302 storage_class = sc_none;
9306 bad_specifiers (decl, "field", virtualp,
9307 memfn_quals != TYPE_UNQUALIFIED,
9308 inlinep, friendp, raises != NULL_TREE);
9311 else if (TREE_CODE (type) == FUNCTION_TYPE
9312 || TREE_CODE (type) == METHOD_TYPE)
9317 if (!unqualified_id)
9318 return error_mark_node;
9320 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9321 original_name = dname;
9323 original_name = unqualified_id;
9325 if (storage_class == sc_auto)
9326 error ("storage class %<auto%> invalid for function %qs", name);
9327 else if (storage_class == sc_register)
9328 error ("storage class %<register%> invalid for function %qs", name);
9330 error ("storage class %<__thread%> invalid for function %qs", name);
9332 /* Function declaration not at top level.
9333 Storage classes other than `extern' are not allowed
9334 and `extern' makes no difference. */
9335 if (! toplevel_bindings_p ()
9336 && (storage_class == sc_static
9337 || declspecs->specs[(int)ds_inline])
9340 if (storage_class == sc_static)
9341 pedwarn (input_location, OPT_pedantic,
9342 "%<static%> specified invalid for function %qs "
9343 "declared out of global scope", name);
9345 pedwarn (input_location, OPT_pedantic,
9346 "%<inline%> specifier invalid for function %qs "
9347 "declared out of global scope", name);
9350 if (ctype != NULL_TREE
9351 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9353 error ("%q#T is not a class or a namespace", ctype);
9357 if (ctype == NULL_TREE)
9361 error ("virtual non-class function %qs", name);
9364 else if (sfk == sfk_constructor
9365 || sfk == sfk_destructor)
9368 ? "%qs defined in a non-class scope"
9369 : "%qs declared in a non-class scope", name);
9373 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9374 && !NEW_DELETE_OPNAME_P (original_name))
9375 type = build_method_type_directly (ctype,
9377 TYPE_ARG_TYPES (type));
9379 /* Record presence of `static'. */
9380 publicp = (ctype != NULL_TREE
9381 || storage_class == sc_extern
9382 || storage_class != sc_static);
9384 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9385 virtualp, flags, memfn_quals, raises,
9387 publicp, inlinep, sfk, funcdef_flag,
9388 template_count, in_namespace, attrlist,
9389 declarator->id_loc);
9390 if (decl == NULL_TREE)
9391 return error_mark_node;
9395 int invalid_static = 0;
9397 /* Don't allow a static member function in a class, and forbid
9398 declaring main to be static. */
9399 if (TREE_CODE (type) == METHOD_TYPE)
9401 permerror (input_location, "cannot declare member function %qD to have "
9402 "static linkage", decl);
9405 else if (current_function_decl)
9407 /* FIXME need arm citation */
9408 error ("cannot declare static function inside another function");
9415 storage_class = sc_none;
9421 /* It's a variable. */
9423 /* An uninitialized decl with `extern' is a reference. */
9424 decl = grokvardecl (type, unqualified_id,
9427 (type_quals & TYPE_QUAL_CONST) != 0,
9428 ctype ? ctype : in_namespace);
9429 bad_specifiers (decl, "variable", virtualp,
9430 memfn_quals != TYPE_UNQUALIFIED,
9431 inlinep, friendp, raises != NULL_TREE);
9435 DECL_CONTEXT (decl) = ctype;
9438 permerror (input_location, "%<static%> may not be used when defining "
9439 "(as opposed to declaring) a static data member");
9441 storage_class = sc_none;
9443 if (storage_class == sc_register && TREE_STATIC (decl))
9445 error ("static member %qD declared %<register%>", decl);
9446 storage_class = sc_none;
9448 if (storage_class == sc_extern && pedantic)
9450 pedwarn (input_location, OPT_pedantic,
9451 "cannot explicitly declare member %q#D to have "
9452 "extern linkage", decl);
9453 storage_class = sc_none;
9458 if (storage_class == sc_extern && initialized && !funcdef_flag)
9460 if (toplevel_bindings_p ())
9462 /* It's common practice (and completely valid) to have a const
9463 be initialized and declared extern. */
9464 if (!(type_quals & TYPE_QUAL_CONST))
9465 warning (0, "%qs initialized and declared %<extern%>", name);
9469 error ("%qs has both %<extern%> and initializer", name);
9470 return error_mark_node;
9474 /* Record `register' declaration for warnings on &
9475 and in case doing stupid register allocation. */
9477 if (storage_class == sc_register)
9478 DECL_REGISTER (decl) = 1;
9479 else if (storage_class == sc_extern)
9480 DECL_THIS_EXTERN (decl) = 1;
9481 else if (storage_class == sc_static)
9482 DECL_THIS_STATIC (decl) = 1;
9484 /* Record constancy and volatility on the DECL itself . There's
9485 no need to do this when processing a template; we'll do this
9486 for the instantiated declaration based on the type of DECL. */
9487 if (!processing_template_decl)
9488 cp_apply_type_quals_to_decl (type_quals, decl);
9494 /* Subroutine of start_function. Ensure that each of the parameter
9495 types (as listed in PARMS) is complete, as is required for a
9496 function definition. */
9499 require_complete_types_for_parms (tree parms)
9501 for (; parms; parms = TREE_CHAIN (parms))
9503 if (dependent_type_p (TREE_TYPE (parms)))
9505 if (!VOID_TYPE_P (TREE_TYPE (parms))
9506 && complete_type_or_else (TREE_TYPE (parms), parms))
9508 relayout_decl (parms);
9509 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9512 /* grokparms or complete_type_or_else will have already issued
9514 TREE_TYPE (parms) = error_mark_node;
9518 /* Returns nonzero if T is a local variable. */
9521 local_variable_p (const_tree t)
9523 if ((TREE_CODE (t) == VAR_DECL
9524 /* A VAR_DECL with a context that is a _TYPE is a static data
9526 && !TYPE_P (CP_DECL_CONTEXT (t))
9527 /* Any other non-local variable must be at namespace scope. */
9528 && !DECL_NAMESPACE_SCOPE_P (t))
9529 || (TREE_CODE (t) == PARM_DECL))
9535 /* Like local_variable_p, but suitable for use as a tree-walking
9539 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9540 void *data ATTRIBUTE_UNUSED)
9542 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9544 else if (TYPE_P (*tp))
9551 /* Check that ARG, which is a default-argument expression for a
9552 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9553 something goes wrong. DECL may also be a _TYPE node, rather than a
9554 DECL, if there is no DECL available. */
9557 check_default_argument (tree decl, tree arg)
9562 if (TREE_CODE (arg) == DEFAULT_ARG)
9563 /* We get a DEFAULT_ARG when looking at an in-class declaration
9564 with a default argument. Ignore the argument for now; we'll
9565 deal with it after the class is complete. */
9574 decl_type = TREE_TYPE (decl);
9576 if (arg == error_mark_node
9577 || decl == error_mark_node
9578 || TREE_TYPE (arg) == error_mark_node
9579 || decl_type == error_mark_node)
9580 /* Something already went wrong. There's no need to check
9582 return error_mark_node;
9584 /* [dcl.fct.default]
9586 A default argument expression is implicitly converted to the
9588 if (!TREE_TYPE (arg)
9589 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9592 error ("default argument for %q#D has type %qT",
9593 decl, TREE_TYPE (arg));
9595 error ("default argument for parameter of type %qT has type %qT",
9596 decl_type, TREE_TYPE (arg));
9598 return error_mark_node;
9601 /* [dcl.fct.default]
9603 Local variables shall not be used in default argument
9606 The keyword `this' shall not be used in a default argument of a
9608 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9611 error ("default argument %qE uses local variable %qD", arg, var);
9612 return error_mark_node;
9619 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9622 type_is_deprecated (tree type)
9624 enum tree_code code;
9625 if (TREE_DEPRECATED (type))
9627 if (TYPE_NAME (type)
9628 && TREE_DEPRECATED (TYPE_NAME (type)))
9631 code = TREE_CODE (type);
9633 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9634 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9635 || code == METHOD_TYPE || code == ARRAY_TYPE)
9636 return type_is_deprecated (TREE_TYPE (type));
9638 if (TYPE_PTRMEMFUNC_P (type))
9639 return type_is_deprecated
9640 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9645 /* Decode the list of parameter types for a function type.
9646 Given the list of things declared inside the parens,
9647 return a list of types.
9649 If this parameter does not end with an ellipsis, we append
9652 *PARMS is set to the chain of PARM_DECLs created. */
9655 grokparms (tree parmlist, tree *parms)
9657 tree result = NULL_TREE;
9658 tree decls = NULL_TREE;
9662 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9664 tree type = NULL_TREE;
9665 tree init = TREE_PURPOSE (parm);
9666 tree decl = TREE_VALUE (parm);
9669 if (parm == void_list_node)
9672 if (! decl || TREE_TYPE (decl) == error_mark_node)
9675 type = TREE_TYPE (decl);
9676 if (VOID_TYPE_P (type))
9678 if (same_type_p (type, void_type_node)
9679 && DECL_SELF_REFERENCE_P (type)
9680 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9681 /* this is a parmlist of `(void)', which is ok. */
9683 cxx_incomplete_type_error (decl, type);
9684 /* It's not a good idea to actually create parameters of
9685 type `void'; other parts of the compiler assume that a
9686 void type terminates the parameter list. */
9687 type = error_mark_node;
9688 TREE_TYPE (decl) = error_mark_node;
9691 if (type != error_mark_node
9692 && TYPE_FOR_JAVA (type)
9693 && MAYBE_CLASS_TYPE_P (type))
9695 error ("parameter %qD has Java class type", decl);
9696 type = error_mark_node;
9697 TREE_TYPE (decl) = error_mark_node;
9701 if (type != error_mark_node
9702 && (errmsg = targetm.invalid_parameter_type (type)))
9705 type = error_mark_node;
9706 TREE_TYPE (decl) = error_mark_node;
9709 if (type != error_mark_node)
9711 if (deprecated_state != DEPRECATED_SUPPRESS)
9713 tree deptype = type_is_deprecated (type);
9715 warn_deprecated_use (deptype, NULL_TREE);
9718 /* Top-level qualifiers on the parameters are
9719 ignored for function types. */
9720 type = cp_build_qualified_type (type, 0);
9721 if (TREE_CODE (type) == METHOD_TYPE)
9723 error ("parameter %qD invalidly declared method type", decl);
9724 type = build_pointer_type (type);
9725 TREE_TYPE (decl) = type;
9727 else if (abstract_virtuals_error (decl, type))
9728 any_error = 1; /* Seems like a good idea. */
9729 else if (POINTER_TYPE_P (type))
9731 /* [dcl.fct]/6, parameter types cannot contain pointers
9732 (references) to arrays of unknown bound. */
9733 tree t = TREE_TYPE (type);
9734 int ptr = TYPE_PTR_P (type);
9740 else if (TREE_CODE (t) != ARRAY_TYPE)
9742 else if (!TYPE_DOMAIN (t))
9746 if (TREE_CODE (t) == ARRAY_TYPE)
9747 error ("parameter %qD includes %s to array of unknown "
9749 decl, ptr ? "pointer" : "reference", t);
9754 else if (init && !processing_template_decl)
9755 init = check_default_argument (decl, init);
9758 if (TREE_CODE (decl) == PARM_DECL
9759 && FUNCTION_PARAMETER_PACK_P (decl)
9760 && TREE_CHAIN (parm)
9761 && TREE_CHAIN (parm) != void_list_node)
9762 error ("parameter packs must be at the end of the parameter list");
9764 TREE_CHAIN (decl) = decls;
9766 result = tree_cons (init, type, result);
9768 decls = nreverse (decls);
9769 result = nreverse (result);
9771 result = chainon (result, void_list_node);
9778 /* D is a constructor or overloaded `operator='.
9780 Let T be the class in which D is declared. Then, this function
9783 -1 if D's is an ill-formed constructor or copy assignment operator
9784 whose first parameter is of type `T'.
9785 0 if D is not a copy constructor or copy assignment
9787 1 if D is a copy constructor or copy assignment operator whose
9788 first parameter is a reference to const qualified T.
9789 2 if D is a copy constructor or copy assignment operator whose
9790 first parameter is a reference to non-const qualified T.
9792 This function can be used as a predicate. Positive values indicate
9793 a copy constructor and nonzero values indicate a copy assignment
9797 copy_fn_p (const_tree d)
9803 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9805 if (TREE_CODE (d) == TEMPLATE_DECL
9806 || (DECL_TEMPLATE_INFO (d)
9807 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9808 /* Instantiations of template member functions are never copy
9809 functions. Note that member functions of templated classes are
9810 represented as template functions internally, and we must
9811 accept those as copy functions. */
9814 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9818 arg_type = TREE_VALUE (args);
9819 if (arg_type == error_mark_node)
9822 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9824 /* Pass by value copy assignment operator. */
9827 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9828 && !TYPE_REF_IS_RVALUE (arg_type)
9829 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9831 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9837 args = TREE_CHAIN (args);
9839 if (args && args != void_list_node && !TREE_PURPOSE (args))
9840 /* There are more non-optional args. */
9846 /* D is a constructor or overloaded `operator='.
9848 Let T be the class in which D is declared. Then, this function
9849 returns true when D is a move constructor or move assignment
9850 operator, false otherwise. */
9853 move_fn_p (const_tree d)
9857 bool result = false;
9859 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9861 if (cxx_dialect == cxx98)
9862 /* There are no move constructors if we are in C++98 mode. */
9865 if (TREE_CODE (d) == TEMPLATE_DECL
9866 || (DECL_TEMPLATE_INFO (d)
9867 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9868 /* Instantiations of template member functions are never copy
9869 functions. Note that member functions of templated classes are
9870 represented as template functions internally, and we must
9871 accept those as copy functions. */
9874 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9878 arg_type = TREE_VALUE (args);
9879 if (arg_type == error_mark_node)
9882 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9883 && TYPE_REF_IS_RVALUE (arg_type)
9884 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9888 args = TREE_CHAIN (args);
9890 if (args && args != void_list_node && !TREE_PURPOSE (args))
9891 /* There are more non-optional args. */
9897 /* Remember any special properties of member function DECL. */
9900 grok_special_member_properties (tree decl)
9904 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9907 class_type = DECL_CONTEXT (decl);
9908 if (DECL_CONSTRUCTOR_P (decl))
9910 int ctor = copy_fn_p (decl);
9912 if (!DECL_ARTIFICIAL (decl))
9913 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9919 A non-template constructor for class X is a copy
9920 constructor if its first parameter is of type X&, const
9921 X&, volatile X& or const volatile X&, and either there
9922 are no other parameters or else all other parameters have
9923 default arguments. */
9924 TYPE_HAS_INIT_REF (class_type) = 1;
9925 if (!DECL_DEFAULTED_FN (decl))
9926 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9928 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9930 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9932 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9933 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9934 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9936 else if (is_list_ctor (decl))
9937 TYPE_HAS_LIST_CTOR (class_type) = 1;
9939 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9943 A non-template assignment operator for class X is a copy
9944 assignment operator if its parameter is of type X, X&, const
9945 X&, volatile X& or const volatile X&. */
9947 int assop = copy_fn_p (decl);
9951 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9952 if (!DECL_DEFAULTED_FN (decl))
9953 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9955 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9960 /* Check a constructor DECL has the correct form. Complains
9961 if the class has a constructor of the form X(X). */
9964 grok_ctor_properties (const_tree ctype, const_tree decl)
9966 int ctor_parm = copy_fn_p (decl);
9972 A declaration of a constructor for a class X is ill-formed if
9973 its first parameter is of type (optionally cv-qualified) X
9974 and either there are no other parameters or else all other
9975 parameters have default arguments.
9977 We *don't* complain about member template instantiations that
9978 have this form, though; they can occur as we try to decide
9979 what constructor to use during overload resolution. Since
9980 overload resolution will never prefer such a constructor to
9981 the non-template copy constructor (which is either explicitly
9982 or implicitly defined), there's no need to worry about their
9983 existence. Theoretically, they should never even be
9984 instantiated, but that's hard to forestall. */
9985 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9993 /* An operator with this code is unary, but can also be binary. */
9996 ambi_op_p (enum tree_code code)
9998 return (code == INDIRECT_REF
9999 || code == ADDR_EXPR
10000 || code == UNARY_PLUS_EXPR
10001 || code == NEGATE_EXPR
10002 || code == PREINCREMENT_EXPR
10003 || code == PREDECREMENT_EXPR);
10006 /* An operator with this name can only be unary. */
10009 unary_op_p (enum tree_code code)
10011 return (code == TRUTH_NOT_EXPR
10012 || code == BIT_NOT_EXPR
10013 || code == COMPONENT_REF
10014 || code == TYPE_EXPR);
10017 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10018 errors are issued for invalid declarations. */
10021 grok_op_properties (tree decl, bool complain)
10023 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10025 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10026 tree name = DECL_NAME (decl);
10027 enum tree_code operator_code;
10032 /* Count the number of arguments and check for ellipsis. */
10033 for (argtype = argtypes, arity = 0;
10034 argtype && argtype != void_list_node;
10035 argtype = TREE_CHAIN (argtype))
10037 ellipsis_p = !argtype;
10039 class_type = DECL_CONTEXT (decl);
10040 if (class_type && !CLASS_TYPE_P (class_type))
10041 class_type = NULL_TREE;
10043 if (DECL_CONV_FN_P (decl))
10044 operator_code = TYPE_EXPR;
10048 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10049 if (ansi_opname (CODE) == name) \
10051 operator_code = (CODE); \
10054 else if (ansi_assopname (CODE) == name) \
10056 operator_code = (CODE); \
10057 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10061 #include "operators.def"
10062 #undef DEF_OPERATOR
10064 gcc_unreachable ();
10067 gcc_assert (operator_code != MAX_TREE_CODES);
10068 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10071 switch (operator_code)
10074 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10078 TYPE_GETS_DELETE (class_type) |= 1;
10082 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10085 case VEC_DELETE_EXPR:
10086 TYPE_GETS_DELETE (class_type) |= 2;
10093 /* [basic.std.dynamic.allocation]/1:
10095 A program is ill-formed if an allocation function is declared
10096 in a namespace scope other than global scope or declared static
10099 The same also holds true for deallocation functions. */
10100 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10101 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10103 if (DECL_NAMESPACE_SCOPE_P (decl))
10105 if (CP_DECL_CONTEXT (decl) != global_namespace)
10107 error ("%qD may not be declared within a namespace", decl);
10110 else if (!TREE_PUBLIC (decl))
10112 error ("%qD may not be declared as static", decl);
10118 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10120 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10121 DECL_IS_OPERATOR_NEW (decl) = 1;
10123 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10124 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10127 /* An operator function must either be a non-static member function
10128 or have at least one parameter of a class, a reference to a class,
10129 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10130 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10132 if (operator_code == TYPE_EXPR
10133 || operator_code == CALL_EXPR
10134 || operator_code == COMPONENT_REF
10135 || operator_code == ARRAY_REF
10136 || operator_code == NOP_EXPR)
10138 error ("%qD must be a nonstatic member function", decl);
10145 if (DECL_STATIC_FUNCTION_P (decl))
10147 error ("%qD must be either a non-static member "
10148 "function or a non-member function", decl);
10152 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10154 tree arg = non_reference (TREE_VALUE (p));
10155 if (arg == error_mark_node)
10158 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10159 because these checks are performed even on
10160 template functions. */
10161 if (MAYBE_CLASS_TYPE_P (arg)
10162 || TREE_CODE (arg) == ENUMERAL_TYPE)
10166 if (!p || p == void_list_node)
10169 error ("%qD must have an argument of class or "
10170 "enumerated type", decl);
10176 /* There are no restrictions on the arguments to an overloaded
10178 if (operator_code == CALL_EXPR)
10181 /* Warn about conversion operators that will never be used. */
10182 if (IDENTIFIER_TYPENAME_P (name)
10183 && ! DECL_TEMPLATE_INFO (decl)
10185 /* Warn only declaring the function; there is no need to
10186 warn again about out-of-class definitions. */
10187 && class_type == current_class_type)
10189 tree t = TREE_TYPE (name);
10190 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10191 const char *what = 0;
10194 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10196 if (TREE_CODE (t) == VOID_TYPE)
10198 else if (class_type)
10200 if (t == class_type)
10201 what = "the same type";
10202 /* Don't force t to be complete here. */
10203 else if (MAYBE_CLASS_TYPE_P (t)
10204 && COMPLETE_TYPE_P (t)
10205 && DERIVED_FROM_P (t, class_type))
10206 what = "a base class";
10210 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10211 "conversion operator",
10212 ref ? "a reference to " : "", what);
10215 if (operator_code == COND_EXPR)
10218 error ("ISO C++ prohibits overloading operator ?:");
10221 else if (ellipsis_p)
10223 error ("%qD must not have variable number of arguments", decl);
10226 else if (ambi_op_p (operator_code))
10229 /* We pick the one-argument operator codes by default, so
10230 we don't have to change anything. */
10232 else if (arity == 2)
10234 /* If we thought this was a unary operator, we now know
10235 it to be a binary operator. */
10236 switch (operator_code)
10239 operator_code = MULT_EXPR;
10243 operator_code = BIT_AND_EXPR;
10246 case UNARY_PLUS_EXPR:
10247 operator_code = PLUS_EXPR;
10251 operator_code = MINUS_EXPR;
10254 case PREINCREMENT_EXPR:
10255 operator_code = POSTINCREMENT_EXPR;
10258 case PREDECREMENT_EXPR:
10259 operator_code = POSTDECREMENT_EXPR;
10263 gcc_unreachable ();
10266 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10268 if ((operator_code == POSTINCREMENT_EXPR
10269 || operator_code == POSTDECREMENT_EXPR)
10270 && ! processing_template_decl
10271 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10274 error ("postfix %qD must take %<int%> as its argument",
10277 error ("postfix %qD must take %<int%> as its second "
10285 error ("%qD must take either zero or one argument", decl);
10287 error ("%qD must take either one or two arguments", decl);
10291 /* More Effective C++ rule 6. */
10293 && (operator_code == POSTINCREMENT_EXPR
10294 || operator_code == POSTDECREMENT_EXPR
10295 || operator_code == PREINCREMENT_EXPR
10296 || operator_code == PREDECREMENT_EXPR))
10298 tree arg = TREE_VALUE (argtypes);
10299 tree ret = TREE_TYPE (TREE_TYPE (decl));
10300 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10301 arg = TREE_TYPE (arg);
10302 arg = TYPE_MAIN_VARIANT (arg);
10303 if (operator_code == PREINCREMENT_EXPR
10304 || operator_code == PREDECREMENT_EXPR)
10306 if (TREE_CODE (ret) != REFERENCE_TYPE
10307 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10309 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10310 build_reference_type (arg));
10314 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10315 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10319 else if (unary_op_p (operator_code))
10324 error ("%qD must take %<void%>", decl);
10326 error ("%qD must take exactly one argument", decl);
10330 else /* if (binary_op_p (operator_code)) */
10335 error ("%qD must take exactly one argument", decl);
10337 error ("%qD must take exactly two arguments", decl);
10341 /* More Effective C++ rule 7. */
10343 && (operator_code == TRUTH_ANDIF_EXPR
10344 || operator_code == TRUTH_ORIF_EXPR
10345 || operator_code == COMPOUND_EXPR))
10346 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10350 /* Effective C++ rule 23. */
10353 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10354 && (operator_code == PLUS_EXPR
10355 || operator_code == MINUS_EXPR
10356 || operator_code == TRUNC_DIV_EXPR
10357 || operator_code == MULT_EXPR
10358 || operator_code == TRUNC_MOD_EXPR)
10359 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10360 warning (OPT_Weffc__, "%qD should return by value", decl);
10362 /* [over.oper]/8 */
10363 for (; argtypes && argtypes != void_list_node;
10364 argtypes = TREE_CHAIN (argtypes))
10365 if (TREE_PURPOSE (argtypes))
10367 TREE_PURPOSE (argtypes) = NULL_TREE;
10368 if (operator_code == POSTINCREMENT_EXPR
10369 || operator_code == POSTDECREMENT_EXPR)
10371 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10376 error ("%qD cannot have default arguments", decl);
10384 /* Return a string giving the keyword associate with CODE. */
10386 static const char *
10387 tag_name (enum tag_types code)
10399 case typename_type:
10402 gcc_unreachable ();
10406 /* Name lookup in an elaborated-type-specifier (after the keyword
10407 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10408 elaborated-type-specifier is invalid, issue a diagnostic and return
10409 error_mark_node; otherwise, return the *_TYPE to which it referred.
10410 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10413 check_elaborated_type_specifier (enum tag_types tag_code,
10415 bool allow_template_p)
10421 struct S { struct S *p; };
10423 name lookup will find the TYPE_DECL for the implicit "S::S"
10424 typedef. Adjust for that here. */
10425 if (DECL_SELF_REFERENCE_P (decl))
10426 decl = TYPE_NAME (TREE_TYPE (decl));
10428 type = TREE_TYPE (decl);
10430 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10431 is false for this case as well. */
10432 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10434 error ("using template type parameter %qT after %qs",
10435 type, tag_name (tag_code));
10436 return error_mark_node;
10440 If the identifier resolves to a typedef-name or a template
10441 type-parameter, the elaborated-type-specifier is ill-formed.
10443 In other words, the only legitimate declaration to use in the
10444 elaborated type specifier is the implicit typedef created when
10445 the type is declared. */
10446 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10447 && tag_code != typename_type)
10449 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10450 error ("%q+D has a previous declaration here", decl);
10451 return error_mark_node;
10453 else if (TREE_CODE (type) != RECORD_TYPE
10454 && TREE_CODE (type) != UNION_TYPE
10455 && tag_code != enum_type
10456 && tag_code != typename_type)
10458 error ("%qT referred to as %qs", type, tag_name (tag_code));
10459 error ("%q+T has a previous declaration here", type);
10460 return error_mark_node;
10462 else if (TREE_CODE (type) != ENUMERAL_TYPE
10463 && tag_code == enum_type)
10465 error ("%qT referred to as enum", type);
10466 error ("%q+T has a previous declaration here", type);
10467 return error_mark_node;
10469 else if (!allow_template_p
10470 && TREE_CODE (type) == RECORD_TYPE
10471 && CLASSTYPE_IS_TEMPLATE (type))
10473 /* If a class template appears as elaborated type specifier
10474 without a template header such as:
10476 template <class T> class C {};
10477 void f(class C); // No template header here
10479 then the required template argument is missing. */
10480 error ("template argument required for %<%s %T%>",
10481 tag_name (tag_code),
10482 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10483 return error_mark_node;
10489 /* Lookup NAME in elaborate type specifier in scope according to
10490 SCOPE and issue diagnostics if necessary.
10491 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10492 found, and ERROR_MARK_NODE for type error. */
10495 lookup_and_check_tag (enum tag_types tag_code, tree name,
10496 tag_scope scope, bool template_header_p)
10500 if (scope == ts_global)
10502 /* First try ordinary name lookup, ignoring hidden class name
10503 injected via friend declaration. */
10504 decl = lookup_name_prefer_type (name, 2);
10505 /* If that fails, the name will be placed in the smallest
10506 non-class, non-function-prototype scope according to 3.3.1/5.
10507 We may already have a hidden name declared as friend in this
10508 scope. So lookup again but not ignoring hidden names.
10509 If we find one, that name will be made visible rather than
10510 creating a new tag. */
10512 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10515 decl = lookup_type_scope (name, scope);
10517 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10518 decl = DECL_TEMPLATE_RESULT (decl);
10520 if (decl && TREE_CODE (decl) == TYPE_DECL)
10522 /* Look for invalid nested type:
10526 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10528 error ("%qD has the same name as the class in which it is "
10531 return error_mark_node;
10534 /* Two cases we need to consider when deciding if a class
10535 template is allowed as an elaborated type specifier:
10536 1. It is a self reference to its own class.
10537 2. It comes with a template header.
10541 template <class T> class C {
10542 class C *c1; // DECL_SELF_REFERENCE_P is true
10545 template <class U> class C; // template_header_p is true
10546 template <class T> class C<T>::D {
10547 class C *c2; // DECL_SELF_REFERENCE_P is true
10550 t = check_elaborated_type_specifier (tag_code,
10553 | DECL_SELF_REFERENCE_P (decl));
10556 else if (decl && TREE_CODE (decl) == TREE_LIST)
10558 error ("reference to %qD is ambiguous", name);
10559 print_candidates (decl);
10560 return error_mark_node;
10566 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10567 Define the tag as a forward-reference if it is not defined.
10569 If a declaration is given, process it here, and report an error if
10570 multiple declarations are not identical.
10572 SCOPE is TS_CURRENT when this is also a definition. Only look in
10573 the current frame for the name (since C++ allows new names in any
10574 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10575 declaration. Only look beginning from the current scope outward up
10576 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10578 TEMPLATE_HEADER_P is true when this declaration is preceded by
10579 a set of template parameters. */
10582 xref_tag (enum tag_types tag_code, tree name,
10583 tag_scope scope, bool template_header_p)
10585 enum tree_code code;
10587 tree context = NULL_TREE;
10589 timevar_push (TV_NAME_LOOKUP);
10591 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10597 code = RECORD_TYPE;
10603 code = ENUMERAL_TYPE;
10606 gcc_unreachable ();
10609 /* In case of anonymous name, xref_tag is only called to
10610 make type node and push name. Name lookup is not required. */
10611 if (ANON_AGGRNAME_P (name))
10614 t = lookup_and_check_tag (tag_code, name,
10615 scope, template_header_p);
10617 if (t == error_mark_node)
10618 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10620 if (scope != ts_current && t && current_class_type
10621 && template_class_depth (current_class_type)
10622 && template_header_p)
10624 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10625 definition of this tag. Since, in addition, we are currently
10626 processing a (member) template declaration of a template
10627 class, we must be very careful; consider:
10634 { template <class V>
10635 friend struct S1; };
10637 Here, the S2::S1 declaration should not be confused with the
10638 outer declaration. In particular, the inner version should
10639 have a template parameter of level 2, not level 1. This
10640 would be particularly important if the member declaration
10643 template <class V = U> friend struct S1;
10645 say, when we should tsubst into `U' when instantiating
10646 S2. On the other hand, when presented with:
10656 we must find the inner binding eventually. We
10657 accomplish this by making sure that the new type we
10658 create to represent this declaration has the right
10660 context = TYPE_CONTEXT (t);
10666 /* If no such tag is yet defined, create a forward-reference node
10667 and record it as the "definition".
10668 When a real declaration of this type is found,
10669 the forward-reference will be altered into a real type. */
10670 if (code == ENUMERAL_TYPE)
10672 error ("use of enum %q#D without previous declaration", name);
10673 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10677 t = make_class_type (code);
10678 TYPE_CONTEXT (t) = context;
10679 t = pushtag (name, t, scope);
10684 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10686 if (!redeclare_class_template (t, current_template_parms))
10687 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10689 else if (!processing_template_decl
10690 && CLASS_TYPE_P (t)
10691 && CLASSTYPE_IS_TEMPLATE (t))
10693 error ("redeclaration of %qT as a non-template", t);
10694 error ("previous declaration %q+D", t);
10695 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10698 /* Make injected friend class visible. */
10699 if (scope != ts_within_enclosing_non_class
10700 && hidden_name_p (TYPE_NAME (t)))
10702 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10703 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10705 if (TYPE_TEMPLATE_INFO (t))
10707 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10708 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10713 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10717 xref_tag_from_type (tree old, tree id, tag_scope scope)
10719 enum tag_types tag_kind;
10721 if (TREE_CODE (old) == RECORD_TYPE)
10722 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10724 tag_kind = union_type;
10726 if (id == NULL_TREE)
10727 id = TYPE_IDENTIFIER (old);
10729 return xref_tag (tag_kind, id, scope, false);
10732 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10733 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10734 access_* node, and the TREE_VALUE is the type of the base-class.
10735 Non-NULL TREE_TYPE indicates virtual inheritance.
10737 Returns true if the binfo hierarchy was successfully created,
10738 false if an error was detected. */
10741 xref_basetypes (tree ref, tree base_list)
10744 tree binfo, base_binfo;
10745 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10746 unsigned max_bases = 0; /* Maximum direct bases. */
10748 tree default_access;
10749 tree igo_prev; /* Track Inheritance Graph Order. */
10751 if (ref == error_mark_node)
10754 /* The base of a derived class is private by default, all others are
10756 default_access = (TREE_CODE (ref) == RECORD_TYPE
10757 && CLASSTYPE_DECLARED_CLASS (ref)
10758 ? access_private_node : access_public_node);
10760 /* First, make sure that any templates in base-classes are
10761 instantiated. This ensures that if we call ourselves recursively
10762 we do not get confused about which classes are marked and which
10764 basep = &base_list;
10767 tree basetype = TREE_VALUE (*basep);
10769 if (!(processing_template_decl && uses_template_parms (basetype))
10770 && !complete_type_or_else (basetype, NULL))
10771 /* An incomplete type. Remove it from the list. */
10772 *basep = TREE_CHAIN (*basep);
10776 if (TREE_TYPE (*basep))
10778 if (CLASS_TYPE_P (basetype))
10779 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10780 basep = &TREE_CHAIN (*basep);
10784 TYPE_MARKED_P (ref) = 1;
10786 /* The binfo slot should be empty, unless this is an (ill-formed)
10788 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10789 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10791 binfo = make_tree_binfo (max_bases);
10793 TYPE_BINFO (ref) = binfo;
10794 BINFO_OFFSET (binfo) = size_zero_node;
10795 BINFO_TYPE (binfo) = ref;
10797 /* Apply base-class info set up to the variants of this type. */
10798 fixup_type_variants (ref);
10802 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10803 /* An aggregate cannot have baseclasses. */
10804 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10806 if (TREE_CODE (ref) == UNION_TYPE)
10808 error ("derived union %qT invalid", ref);
10815 if (TYPE_FOR_JAVA (ref))
10817 error ("Java class %qT cannot have multiple bases", ref);
10824 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10826 if (TYPE_FOR_JAVA (ref))
10828 error ("Java class %qT cannot have virtual bases", ref);
10833 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10835 tree access = TREE_PURPOSE (base_list);
10836 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10837 tree basetype = TREE_VALUE (base_list);
10839 if (access == access_default_node)
10840 access = default_access;
10842 if (PACK_EXPANSION_P (basetype))
10843 basetype = PACK_EXPANSION_PATTERN (basetype);
10844 if (TREE_CODE (basetype) == TYPE_DECL)
10845 basetype = TREE_TYPE (basetype);
10846 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10848 error ("base type %qT fails to be a struct or class type",
10853 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10854 TYPE_FOR_JAVA (ref) = 1;
10856 base_binfo = NULL_TREE;
10857 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10859 base_binfo = TYPE_BINFO (basetype);
10860 /* The original basetype could have been a typedef'd type. */
10861 basetype = BINFO_TYPE (base_binfo);
10863 /* Inherit flags from the base. */
10864 TYPE_HAS_NEW_OPERATOR (ref)
10865 |= TYPE_HAS_NEW_OPERATOR (basetype);
10866 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10867 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10868 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10869 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10870 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10871 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10872 CLASSTYPE_REPEATED_BASE_P (ref)
10873 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10876 /* We must do this test after we've seen through a typedef
10878 if (TYPE_MARKED_P (basetype))
10880 if (basetype == ref)
10881 error ("recursive type %qT undefined", basetype);
10883 error ("duplicate base type %qT invalid", basetype);
10887 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10888 /* Regenerate the pack expansion for the bases. */
10889 basetype = make_pack_expansion (basetype);
10891 TYPE_MARKED_P (basetype) = 1;
10893 base_binfo = copy_binfo (base_binfo, basetype, ref,
10894 &igo_prev, via_virtual);
10895 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10896 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10898 BINFO_BASE_APPEND (binfo, base_binfo);
10899 BINFO_BASE_ACCESS_APPEND (binfo, access);
10902 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10903 /* If we have space in the vbase vector, we must have shared at
10904 least one of them, and are therefore diamond shaped. */
10905 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10907 /* Unmark all the types. */
10908 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10909 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10910 TYPE_MARKED_P (ref) = 0;
10912 /* Now see if we have a repeated base type. */
10913 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10915 for (base_binfo = binfo; base_binfo;
10916 base_binfo = TREE_CHAIN (base_binfo))
10918 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10920 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10923 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10925 for (base_binfo = binfo; base_binfo;
10926 base_binfo = TREE_CHAIN (base_binfo))
10927 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10928 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10937 /* Begin compiling the definition of an enumeration type.
10940 UNDERLYING_TYPE is the type that will be used as the storage for
10941 the enumeration type. This should be NULL_TREE if no storage type
10944 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10946 Returns the type object, as yet incomplete.
10947 Also records info about it so that build_enumerator
10948 may be used to declare the individual values as they are read. */
10951 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10955 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10957 /* If this is the real definition for a previous forward reference,
10958 fill in the contents in the same object that used to be the
10959 forward reference. */
10961 enumtype = lookup_and_check_tag (enum_type, name,
10962 /*tag_scope=*/ts_current,
10963 /*template_header_p=*/false);
10965 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10967 error_at (input_location, "multiple definition of %q#T", enumtype);
10968 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
10969 "previous definition here");
10970 /* Clear out TYPE_VALUES, and start again. */
10971 TYPE_VALUES (enumtype) = NULL_TREE;
10975 /* In case of error, make a dummy enum to allow parsing to
10977 if (enumtype == error_mark_node)
10978 name = make_anon_name ();
10980 enumtype = make_node (ENUMERAL_TYPE);
10981 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10984 if (enumtype == error_mark_node)
10989 SET_SCOPED_ENUM_P (enumtype, 1);
10990 begin_scope (sk_scoped_enum, enumtype);
10992 /* [C++0x dcl.enum]p5:
10994 If not explicitly specified, the underlying type of a scoped
10995 enumeration type is int. */
10996 if (!underlying_type)
10997 underlying_type = integer_type_node;
11000 if (underlying_type)
11002 if (CP_INTEGRAL_TYPE_P (underlying_type))
11004 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11005 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11006 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11007 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11008 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11009 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11010 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11011 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11012 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11013 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11015 else if (!dependent_type_p (underlying_type))
11016 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11017 underlying_type, enumtype);
11023 /* After processing and defining all the values of an enumeration type,
11024 install their decls in the enumeration type and finish it off.
11025 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11028 finish_enum (tree enumtype)
11037 bool use_short_enum;
11042 tree underlying_type = NULL_TREE;
11043 bool fixed_underlying_type_p
11044 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11046 /* We built up the VALUES in reverse order. */
11047 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11049 /* For an enum defined in a template, just set the type of the values;
11050 all further processing is postponed until the template is
11051 instantiated. We need to set the type so that tsubst of a CONST_DECL
11053 if (processing_template_decl)
11055 for (values = TYPE_VALUES (enumtype);
11057 values = TREE_CHAIN (values))
11058 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11059 if (at_function_scope_p ())
11060 add_stmt (build_min (TAG_DEFN, enumtype));
11061 if (SCOPED_ENUM_P (enumtype))
11066 /* Determine the minimum and maximum values of the enumerators. */
11067 if (TYPE_VALUES (enumtype))
11069 minnode = maxnode = NULL_TREE;
11071 for (values = TYPE_VALUES (enumtype);
11073 values = TREE_CHAIN (values))
11075 decl = TREE_VALUE (values);
11077 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11078 each enumerator has the type of its enumeration. Prior to the
11079 closing brace, the type of each enumerator is the type of its
11080 initializing value. */
11081 TREE_TYPE (decl) = enumtype;
11083 /* Update the minimum and maximum values, if appropriate. */
11084 value = DECL_INITIAL (decl);
11085 if (value == error_mark_node)
11086 value = integer_zero_node;
11087 /* Figure out what the minimum and maximum values of the
11088 enumerators are. */
11090 minnode = maxnode = value;
11091 else if (tree_int_cst_lt (maxnode, value))
11093 else if (tree_int_cst_lt (value, minnode))
11100 If the enumerator-list is empty, the underlying type is as if
11101 the enumeration had a single enumerator with value 0. */
11102 minnode = maxnode = integer_zero_node;
11104 /* Compute the number of bits require to represent all values of the
11105 enumeration. We must do this before the type of MINNODE and
11106 MAXNODE are transformed, since tree_int_cst_min_precision relies
11107 on the TREE_TYPE of the value it is passed. */
11108 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11109 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11110 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11111 precision = MAX (lowprec, highprec);
11113 if (!fixed_underlying_type_p)
11115 /* Determine the underlying type of the enumeration.
11119 The underlying type of an enumeration is an integral type that
11120 can represent all the enumerator values defined in the
11121 enumeration. It is implementation-defined which integral type is
11122 used as the underlying type for an enumeration except that the
11123 underlying type shall not be larger than int unless the value of
11124 an enumerator cannot fit in an int or unsigned int.
11126 We use "int" or an "unsigned int" as the underlying type, even if
11127 a smaller integral type would work, unless the user has
11128 explicitly requested that we use the smallest possible type. The
11129 user can request that for all enumerations with a command line
11130 flag, or for just one enumeration with an attribute. */
11132 use_short_enum = flag_short_enums
11133 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11135 for (itk = (use_short_enum ? itk_char : itk_int);
11139 underlying_type = integer_types[itk];
11140 if (TYPE_PRECISION (underlying_type) >= precision
11141 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11144 if (itk == itk_none)
11148 IF no integral type can represent all the enumerator values, the
11149 enumeration is ill-formed. */
11150 error ("no integral type can represent all of the enumerator values "
11151 "for %qT", enumtype);
11152 precision = TYPE_PRECISION (long_long_integer_type_node);
11153 underlying_type = integer_types[itk_unsigned_long_long];
11158 The value of sizeof() applied to an enumeration type, an object
11159 of an enumeration type, or an enumerator, is the value of sizeof()
11160 applied to the underlying type. */
11161 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11162 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11163 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11164 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11165 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11166 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11168 /* Set the underlying type of the enumeration type to the
11169 computed enumeration type, restricted to the enumerator
11171 ENUM_UNDERLYING_TYPE (enumtype)
11172 = build_distinct_type_copy (underlying_type);
11173 set_min_and_max_values_for_integral_type
11174 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11177 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11179 /* Compute the minimum and maximum values for the type.
11183 For an enumeration where emin is the smallest enumerator and emax
11184 is the largest, the values of the enumeration are the values of the
11185 underlying type in the range bmin to bmax, where bmin and bmax are,
11186 respectively, the smallest and largest values of the smallest bit-
11187 field that can store emin and emax. */
11189 /* The middle-end currently assumes that types with TYPE_PRECISION
11190 narrower than their underlying type are suitably zero or sign
11191 extended to fill their mode. g++ doesn't make these guarantees.
11192 Until the middle-end can represent such paradoxical types, we
11193 set the TYPE_PRECISION to the width of the underlying type. */
11194 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11196 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11198 /* Convert each of the enumerators to the type of the underlying
11199 type of the enumeration. */
11200 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11202 location_t saved_location;
11204 decl = TREE_VALUE (values);
11205 saved_location = input_location;
11206 input_location = DECL_SOURCE_LOCATION (decl);
11207 if (fixed_underlying_type_p)
11208 /* If the enumeration type has a fixed underlying type, we
11209 already checked all of the enumerator values. */
11210 value = DECL_INITIAL (decl);
11212 value = perform_implicit_conversion (underlying_type,
11213 DECL_INITIAL (decl),
11214 tf_warning_or_error);
11215 input_location = saved_location;
11217 /* Do not clobber shared ints. */
11218 value = copy_node (value);
11220 TREE_TYPE (value) = enumtype;
11221 DECL_INITIAL (decl) = value;
11224 /* Fix up all variant types of this enum type. */
11225 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11227 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11228 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11229 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11230 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11231 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11232 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11233 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11234 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11235 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11236 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11237 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11240 /* Finish up the scope of a scoped enumeration. */
11241 if (SCOPED_ENUM_P (enumtype))
11244 /* Finish debugging output for this type. */
11245 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11248 /* Build and install a CONST_DECL for an enumeration constant of the
11249 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11250 Assignment of sequential values by default is handled here. */
11253 build_enumerator (tree name, tree value, tree enumtype)
11259 /* If the VALUE was erroneous, pretend it wasn't there; that will
11260 result in the enum being assigned the next value in sequence. */
11261 if (value == error_mark_node)
11264 /* Remove no-op casts from the value. */
11266 STRIP_TYPE_NOPS (value);
11268 if (! processing_template_decl)
11270 /* Validate and default VALUE. */
11271 if (value != NULL_TREE)
11273 value = integral_constant_value (value);
11275 if (TREE_CODE (value) == INTEGER_CST)
11277 value = perform_integral_promotions (value);
11278 constant_expression_warning (value);
11282 error ("enumerator value for %qD is not an integer constant", name);
11287 /* Default based on previous value. */
11288 if (value == NULL_TREE)
11290 if (TYPE_VALUES (enumtype))
11293 unsigned HOST_WIDE_INT lo;
11297 /* The next value is the previous value plus one.
11298 add_double doesn't know the type of the target expression,
11299 so we must check with int_fits_type_p as well. */
11300 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11301 if (error_operand_p (prev_value))
11302 value = error_mark_node;
11305 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11306 TREE_INT_CST_HIGH (prev_value),
11308 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11310 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11314 error ("overflow in enumeration values at %qD", name);
11315 value = error_mark_node;
11320 value = integer_zero_node;
11323 /* Remove no-op casts from the value. */
11324 STRIP_TYPE_NOPS (value);
11326 /* If the underlying type of the enum is fixed, check whether
11327 the enumerator values fits in the underlying type. If it
11328 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11329 if (ENUM_UNDERLYING_TYPE (enumtype)
11331 && TREE_CODE (value) == INTEGER_CST
11332 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11334 error ("enumerator value %E is too large for underlying type %<%T%>",
11335 value, ENUM_UNDERLYING_TYPE (enumtype));
11337 /* Silently convert the value so that we can continue. */
11338 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11343 /* C++ associates enums with global, function, or class declarations. */
11344 context = current_scope ();
11346 /* Build the actual enumeration constant. Note that the enumeration
11347 constants have the underlying type of the enum (if it is fixed)
11348 or the type of their initializer (if the underlying type of the
11349 enum is not fixed):
11353 If the underlying type is fixed, the type of each enumerator
11354 prior to the closing brace is the underlying type; if the
11355 initializing value of an enumerator cannot be represented by
11356 the underlying type, the program is ill-formed. If the
11357 underlying type is not fixed, the type of each enumerator is
11358 the type of its initializing value.
11360 If the underlying type is not fixed, it will be computed by
11361 finish_enum and we will reset the type of this enumerator. Of
11362 course, if we're processing a template, there may be no value. */
11363 type = value ? TREE_TYPE (value) : NULL_TREE;
11365 if (context && context == current_class_type)
11366 /* This enum declaration is local to the class. We need the full
11367 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11368 decl = build_lang_decl (CONST_DECL, name, type);
11370 /* It's a global enum, or it's local to a function. (Note local to
11371 a function could mean local to a class method. */
11372 decl = build_decl (input_location, CONST_DECL, name, type);
11374 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11375 TREE_CONSTANT (decl) = 1;
11376 TREE_READONLY (decl) = 1;
11377 DECL_INITIAL (decl) = value;
11379 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11380 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11381 on the TYPE_FIELDS list for `S'. (That's so that you can say
11382 things like `S::i' later.) */
11383 finish_member_declaration (decl);
11387 /* Add this enumeration constant to the list for this type. */
11388 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11391 /* Look for an enumerator with the given NAME within the enumeration
11392 type ENUMTYPE. This routine is used primarily for qualified name
11393 lookup into an enumerator in C++0x, e.g.,
11395 enum class Color { Red, Green, Blue };
11397 Color color = Color::Red;
11399 Returns the value corresponding to the enumerator, or
11400 NULL_TREE if no such enumerator was found. */
11402 lookup_enumerator (tree enumtype, tree name)
11405 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11407 e = purpose_member (name, TYPE_VALUES (enumtype));
11408 return e? TREE_VALUE (e) : NULL_TREE;
11412 /* We're defining DECL. Make sure that it's type is OK. */
11415 check_function_type (tree decl, tree current_function_parms)
11417 tree fntype = TREE_TYPE (decl);
11418 tree return_type = complete_type (TREE_TYPE (fntype));
11420 /* In a function definition, arg types must be complete. */
11421 require_complete_types_for_parms (current_function_parms);
11423 if (dependent_type_p (return_type))
11425 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11426 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11428 tree args = TYPE_ARG_TYPES (fntype);
11430 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11431 error ("return type %q#T is incomplete", return_type);
11433 error ("return type has Java class type %q#T", return_type);
11435 /* Make it return void instead. */
11436 if (TREE_CODE (fntype) == METHOD_TYPE)
11437 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11439 TREE_CHAIN (args));
11441 fntype = build_function_type (void_type_node, args);
11443 = build_exception_variant (fntype,
11444 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11447 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11450 /* Create the FUNCTION_DECL for a function definition.
11451 DECLSPECS and DECLARATOR are the parts of the declaration;
11452 they describe the function's name and the type it returns,
11453 but twisted together in a fashion that parallels the syntax of C.
11455 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11456 DECLARATOR is really the DECL for the function we are about to
11457 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11458 indicating that the function is an inline defined in-class.
11460 This function creates a binding context for the function body
11461 as well as setting up the FUNCTION_DECL in current_function_decl.
11463 For C++, we must first check whether that datum makes any sense.
11464 For example, "class A local_a(1,2);" means that variable local_a
11465 is an aggregate of type A, which should have a constructor
11466 applied to it with the argument list [1, 2].
11468 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11469 or may be a BLOCK if the function has been defined previously
11470 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11471 error_mark_node if the function has never been defined, or
11472 a BLOCK if the function has been defined somewhere. */
11475 start_preparsed_function (tree decl1, tree attrs, int flags)
11477 tree ctype = NULL_TREE;
11480 int doing_friend = 0;
11481 struct cp_binding_level *bl;
11482 tree current_function_parms;
11483 struct c_fileinfo *finfo
11484 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11485 bool honor_interface;
11487 /* Sanity check. */
11488 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11489 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11491 fntype = TREE_TYPE (decl1);
11492 if (TREE_CODE (fntype) == METHOD_TYPE)
11493 ctype = TYPE_METHOD_BASETYPE (fntype);
11495 /* ISO C++ 11.4/5. A friend function defined in a class is in
11496 the (lexical) scope of the class in which it is defined. */
11497 if (!ctype && DECL_FRIEND_P (decl1))
11499 ctype = DECL_FRIEND_CONTEXT (decl1);
11501 /* CTYPE could be null here if we're dealing with a template;
11502 for example, `inline friend float foo()' inside a template
11503 will have no CTYPE set. */
11504 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11510 if (DECL_DECLARED_INLINE_P (decl1)
11511 && lookup_attribute ("noinline", attrs))
11512 warning (0, "inline function %q+D given attribute noinline", decl1);
11514 /* Handle gnu_inline attribute. */
11515 if (GNU_INLINE_P (decl1))
11517 DECL_EXTERNAL (decl1) = 1;
11518 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11519 DECL_INTERFACE_KNOWN (decl1) = 1;
11520 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11523 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11524 /* This is a constructor, we must ensure that any default args
11525 introduced by this definition are propagated to the clones
11526 now. The clones are used directly in overload resolution. */
11527 adjust_clone_args (decl1);
11529 /* Sometimes we don't notice that a function is a static member, and
11530 build a METHOD_TYPE for it. Fix that up now. */
11531 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11532 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11534 revert_static_member_fn (decl1);
11538 /* Set up current_class_type, and enter the scope of the class, if
11541 push_nested_class (ctype);
11542 else if (DECL_STATIC_FUNCTION_P (decl1))
11543 push_nested_class (DECL_CONTEXT (decl1));
11545 /* Now that we have entered the scope of the class, we must restore
11546 the bindings for any template parameters surrounding DECL1, if it
11547 is an inline member template. (Order is important; consider the
11548 case where a template parameter has the same name as a field of
11549 the class.) It is not until after this point that
11550 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11551 if (flags & SF_INCLASS_INLINE)
11552 maybe_begin_member_template_processing (decl1);
11554 /* Effective C++ rule 15. */
11556 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11557 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11558 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11560 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11561 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11562 if (!DECL_INITIAL (decl1))
11563 DECL_INITIAL (decl1) = error_mark_node;
11565 /* This function exists in static storage.
11566 (This does not mean `static' in the C sense!) */
11567 TREE_STATIC (decl1) = 1;
11569 /* We must call push_template_decl after current_class_type is set
11570 up. (If we are processing inline definitions after exiting a
11571 class scope, current_class_type will be NULL_TREE until set above
11572 by push_nested_class.) */
11573 if (processing_template_decl)
11575 /* FIXME: Handle error_mark_node more gracefully. */
11576 tree newdecl1 = push_template_decl (decl1);
11577 if (newdecl1 != error_mark_node)
11581 /* We are now in the scope of the function being defined. */
11582 current_function_decl = decl1;
11584 /* Save the parm names or decls from this function's declarator
11585 where store_parm_decls will find them. */
11586 current_function_parms = DECL_ARGUMENTS (decl1);
11588 /* Make sure the parameter and return types are reasonable. When
11589 you declare a function, these types can be incomplete, but they
11590 must be complete when you define the function. */
11591 check_function_type (decl1, current_function_parms);
11593 /* Build the return declaration for the function. */
11594 restype = TREE_TYPE (fntype);
11595 if (DECL_RESULT (decl1) == NULL_TREE)
11599 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11600 DECL_ARTIFICIAL (resdecl) = 1;
11601 DECL_IGNORED_P (resdecl) = 1;
11602 DECL_RESULT (decl1) = resdecl;
11604 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11607 /* Let the user know we're compiling this function. */
11608 announce_function (decl1);
11610 /* Record the decl so that the function name is defined.
11611 If we already have a decl for this name, and it is a FUNCTION_DECL,
11612 use the old decl. */
11613 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11615 /* A specialization is not used to guide overload resolution. */
11616 if (!DECL_FUNCTION_MEMBER_P (decl1)
11617 && !(DECL_USE_TEMPLATE (decl1) &&
11618 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11620 tree olddecl = pushdecl (decl1);
11622 if (olddecl == error_mark_node)
11623 /* If something went wrong when registering the declaration,
11624 use DECL1; we have to have a FUNCTION_DECL to use when
11625 parsing the body of the function. */
11629 /* Otherwise, OLDDECL is either a previous declaration
11630 of the same function or DECL1 itself. */
11632 if (warn_missing_declarations
11633 && olddecl == decl1
11634 && !DECL_MAIN_P (decl1)
11635 && TREE_PUBLIC (decl1)
11636 && !DECL_DECLARED_INLINE_P (decl1))
11640 /* Check whether DECL1 is in an anonymous
11642 for (context = DECL_CONTEXT (decl1);
11644 context = DECL_CONTEXT (context))
11646 if (TREE_CODE (context) == NAMESPACE_DECL
11647 && DECL_NAME (context) == NULL_TREE)
11651 if (context == NULL)
11652 warning (OPT_Wmissing_declarations,
11653 "no previous declaration for %q+D", decl1);
11661 /* We need to set the DECL_CONTEXT. */
11662 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11663 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11665 fntype = TREE_TYPE (decl1);
11667 /* If #pragma weak applies, mark the decl appropriately now.
11668 The pragma only applies to global functions. Because
11669 determining whether or not the #pragma applies involves
11670 computing the mangled name for the declaration, we cannot
11671 apply the pragma until after we have merged this declaration
11672 with any previous declarations; if the original declaration
11673 has a linkage specification, that specification applies to
11674 the definition as well, and may affect the mangled name. */
11675 if (!DECL_CONTEXT (decl1))
11676 maybe_apply_pragma_weak (decl1);
11679 /* Reset this in case the call to pushdecl changed it. */
11680 current_function_decl = decl1;
11682 gcc_assert (DECL_INITIAL (decl1));
11684 /* This function may already have been parsed, in which case just
11685 return; our caller will skip over the body without parsing. */
11686 if (DECL_INITIAL (decl1) != error_mark_node)
11689 /* Initialize RTL machinery. We cannot do this until
11690 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11691 even when processing a template; this is how we get
11692 CFUN set up, and our per-function variables initialized.
11693 FIXME factor out the non-RTL stuff. */
11694 bl = current_binding_level;
11695 allocate_struct_function (decl1, processing_template_decl);
11697 /* Initialize the language data structures. Whenever we start
11698 a new function, we destroy temporaries in the usual way. */
11699 cfun->language = GGC_CNEW (struct language_function);
11700 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11701 current_binding_level = bl;
11703 /* Even though we're inside a function body, we still don't want to
11704 call expand_expr to calculate the size of a variable-sized array.
11705 We haven't necessarily assigned RTL to all variables yet, so it's
11706 not safe to try to expand expressions involving them. */
11707 cfun->dont_save_pending_sizes_p = 1;
11709 /* Start the statement-tree, start the tree now. */
11710 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11712 /* If we are (erroneously) defining a function that we have already
11713 defined before, wipe out what we knew before. */
11714 if (!DECL_PENDING_INLINE_P (decl1))
11715 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11717 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11719 /* We know that this was set up by `grokclassfn'. We do not
11720 wait until `store_parm_decls', since evil parse errors may
11721 never get us to that point. Here we keep the consistency
11722 between `current_class_type' and `current_class_ptr'. */
11723 tree t = DECL_ARGUMENTS (decl1);
11725 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11726 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11728 cp_function_chain->x_current_class_ref
11729 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11730 cp_function_chain->x_current_class_ptr = t;
11732 /* Constructors and destructors need to know whether they're "in
11733 charge" of initializing virtual base classes. */
11734 t = TREE_CHAIN (t);
11735 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11737 current_in_charge_parm = t;
11738 t = TREE_CHAIN (t);
11740 if (DECL_HAS_VTT_PARM_P (decl1))
11742 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11743 current_vtt_parm = t;
11747 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11748 /* Implicitly-defined methods (like the
11749 destructor for a class in which no destructor
11750 is explicitly declared) must not be defined
11751 until their definition is needed. So, we
11752 ignore interface specifications for
11753 compiler-generated functions. */
11754 && !DECL_ARTIFICIAL (decl1));
11756 if (DECL_INTERFACE_KNOWN (decl1))
11758 tree ctx = decl_function_context (decl1);
11760 if (DECL_NOT_REALLY_EXTERN (decl1))
11761 DECL_EXTERNAL (decl1) = 0;
11763 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11764 && TREE_PUBLIC (ctx))
11765 /* This is a function in a local class in an extern inline
11767 comdat_linkage (decl1);
11769 /* If this function belongs to an interface, it is public.
11770 If it belongs to someone else's interface, it is also external.
11771 This only affects inlines and template instantiations. */
11772 else if (!finfo->interface_unknown && honor_interface)
11774 if (DECL_DECLARED_INLINE_P (decl1)
11775 || DECL_TEMPLATE_INSTANTIATION (decl1)
11776 || processing_template_decl)
11778 DECL_EXTERNAL (decl1)
11779 = (finfo->interface_only
11780 || (DECL_DECLARED_INLINE_P (decl1)
11781 && ! flag_implement_inlines
11782 && !DECL_VINDEX (decl1)));
11784 /* For WIN32 we also want to put these in linkonce sections. */
11785 maybe_make_one_only (decl1);
11788 DECL_EXTERNAL (decl1) = 0;
11789 DECL_INTERFACE_KNOWN (decl1) = 1;
11790 /* If this function is in an interface implemented in this file,
11791 make sure that the back end knows to emit this function
11793 if (!DECL_EXTERNAL (decl1))
11794 mark_needed (decl1);
11796 else if (finfo->interface_unknown && finfo->interface_only
11797 && honor_interface)
11799 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11800 interface, we will have both finfo->interface_unknown and
11801 finfo->interface_only set. In that case, we don't want to
11802 use the normal heuristics because someone will supply a
11803 #pragma implementation elsewhere, and deducing it here would
11804 produce a conflict. */
11805 comdat_linkage (decl1);
11806 DECL_EXTERNAL (decl1) = 0;
11807 DECL_INTERFACE_KNOWN (decl1) = 1;
11808 DECL_DEFER_OUTPUT (decl1) = 1;
11812 /* This is a definition, not a reference.
11813 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11814 if (!GNU_INLINE_P (decl1))
11815 DECL_EXTERNAL (decl1) = 0;
11817 if ((DECL_DECLARED_INLINE_P (decl1)
11818 || DECL_TEMPLATE_INSTANTIATION (decl1))
11819 && ! DECL_INTERFACE_KNOWN (decl1)
11820 /* Don't try to defer nested functions for now. */
11821 && ! decl_function_context (decl1))
11822 DECL_DEFER_OUTPUT (decl1) = 1;
11824 DECL_INTERFACE_KNOWN (decl1) = 1;
11827 /* Determine the ELF visibility attribute for the function. We must not
11828 do this before calling "pushdecl", as we must allow "duplicate_decls"
11829 to merge any attributes appropriately. We also need to wait until
11831 if (!DECL_CLONED_FUNCTION_P (decl1))
11832 determine_visibility (decl1);
11834 begin_scope (sk_function_parms, decl1);
11838 if (DECL_DESTRUCTOR_P (decl1)
11839 || (DECL_CONSTRUCTOR_P (decl1)
11840 && targetm.cxx.cdtor_returns_this ()))
11842 cdtor_label = build_decl (input_location,
11843 LABEL_DECL, NULL_TREE, NULL_TREE);
11844 DECL_CONTEXT (cdtor_label) = current_function_decl;
11847 start_fname_decls ();
11849 store_parm_decls (current_function_parms);
11853 /* Like start_preparsed_function, except that instead of a
11854 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11856 Returns 1 on success. If the DECLARATOR is not suitable for a function
11857 (it defines a datum instead), we return 0, which tells
11858 yyparse to report a parse error. */
11861 start_function (cp_decl_specifier_seq *declspecs,
11862 const cp_declarator *declarator,
11867 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11868 if (decl1 == error_mark_node)
11870 /* If the declarator is not suitable for a function definition,
11871 cause a syntax error. */
11872 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11874 error ("invalid function declaration");
11878 if (DECL_MAIN_P (decl1))
11879 /* main must return int. grokfndecl should have corrected it
11880 (and issued a diagnostic) if the user got it wrong. */
11881 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11882 integer_type_node));
11884 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11889 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11893 use_eh_spec_block (tree fn)
11895 return (flag_exceptions && flag_enforce_eh_specs
11896 && !processing_template_decl
11897 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11898 /* We insert the EH_SPEC_BLOCK only in the original
11899 function; then, it is copied automatically to the
11901 && !DECL_CLONED_FUNCTION_P (fn)
11902 /* Implicitly-generated constructors and destructors have
11903 exception specifications. However, those specifications
11904 are the union of the possible exceptions specified by the
11905 constructors/destructors for bases and members, so no
11906 unallowed exception will ever reach this function. By
11907 not creating the EH_SPEC_BLOCK we save a little memory,
11908 and we avoid spurious warnings about unreachable
11910 && !DECL_ARTIFICIAL (fn));
11913 /* Store the parameter declarations into the current function declaration.
11914 This is called after parsing the parameter declarations, before
11915 digesting the body of the function.
11917 Also install to binding contour return value identifier, if any. */
11920 store_parm_decls (tree current_function_parms)
11922 tree fndecl = current_function_decl;
11925 /* This is a chain of any other decls that came in among the parm
11926 declarations. If a parm is declared with enum {foo, bar} x;
11927 then CONST_DECLs for foo and bar are put here. */
11928 tree nonparms = NULL_TREE;
11930 if (current_function_parms)
11932 /* This case is when the function was defined with an ANSI prototype.
11933 The parms already have decls, so we need not do anything here
11934 except record them as in effect
11935 and complain if any redundant old-style parm decls were written. */
11937 tree specparms = current_function_parms;
11940 /* Must clear this because it might contain TYPE_DECLs declared
11942 current_binding_level->names = NULL;
11944 /* If we're doing semantic analysis, then we'll call pushdecl
11945 for each of these. We must do them in reverse order so that
11946 they end in the correct forward order. */
11947 specparms = nreverse (specparms);
11949 for (parm = specparms; parm; parm = next)
11951 next = TREE_CHAIN (parm);
11952 if (TREE_CODE (parm) == PARM_DECL)
11954 if (DECL_NAME (parm) == NULL_TREE
11955 || TREE_CODE (parm) != VOID_TYPE)
11958 error ("parameter %qD declared void", parm);
11962 /* If we find an enum constant or a type tag,
11963 put it aside for the moment. */
11964 TREE_CHAIN (parm) = NULL_TREE;
11965 nonparms = chainon (nonparms, parm);
11969 /* Get the decls in their original chain order and record in the
11970 function. This is all and only the PARM_DECLs that were
11971 pushed into scope by the loop above. */
11972 DECL_ARGUMENTS (fndecl) = getdecls ();
11975 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11977 /* Now store the final chain of decls for the arguments
11978 as the decl-chain of the current lexical scope.
11979 Put the enumerators in as well, at the front so that
11980 DECL_ARGUMENTS is not modified. */
11981 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11983 if (use_eh_spec_block (current_function_decl))
11984 current_eh_spec_block = begin_eh_spec_block ();
11988 /* We have finished doing semantic analysis on DECL, but have not yet
11989 generated RTL for its body. Save away our current state, so that
11990 when we want to generate RTL later we know what to do. */
11993 save_function_data (tree decl)
11995 struct language_function *f;
11997 /* Save the language-specific per-function data so that we can
11998 get it back when we really expand this function. */
11999 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12002 f = GGC_NEW (struct language_function);
12003 memcpy (f, cp_function_chain, sizeof (struct language_function));
12004 DECL_SAVED_FUNCTION_DATA (decl) = f;
12006 /* Clear out the bits we don't need. */
12007 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12008 f->bindings = NULL;
12009 f->x_local_names = NULL;
12013 /* Set the return value of the constructor (if present). */
12016 finish_constructor_body (void)
12021 if (targetm.cxx.cdtor_returns_this ()
12022 && (! TYPE_FOR_JAVA (current_class_type)))
12024 /* Any return from a constructor will end up here. */
12025 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12027 val = DECL_ARGUMENTS (current_function_decl);
12028 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12029 DECL_RESULT (current_function_decl), val);
12030 /* Return the address of the object. */
12031 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12032 add_stmt (exprstmt);
12036 /* Do all the processing for the beginning of a destructor; set up the
12037 vtable pointers and cleanups for bases and members. */
12040 begin_destructor_body (void)
12042 tree compound_stmt;
12044 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12045 issued an error message. We still want to try to process the
12046 body of the function, but initialize_vtbl_ptrs will crash if
12047 TYPE_BINFO is NULL. */
12048 if (COMPLETE_TYPE_P (current_class_type))
12050 compound_stmt = begin_compound_stmt (0);
12051 /* Make all virtual function table pointers in non-virtual base
12052 classes point to CURRENT_CLASS_TYPE's virtual function
12054 initialize_vtbl_ptrs (current_class_ptr);
12055 finish_compound_stmt (compound_stmt);
12057 /* And insert cleanups for our bases and members so that they
12058 will be properly destroyed if we throw. */
12059 push_base_cleanups ();
12063 /* At the end of every destructor we generate code to delete the object if
12064 necessary. Do that now. */
12067 finish_destructor_body (void)
12071 /* Any return from a destructor will end up here; that way all base
12072 and member cleanups will be run when the function returns. */
12073 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12075 /* In a virtual destructor, we must call delete. */
12076 if (DECL_VIRTUAL_P (current_function_decl))
12079 tree virtual_size = cxx_sizeof (current_class_type);
12083 At the point of definition of a virtual destructor (including
12084 an implicit definition), non-placement operator delete shall
12085 be looked up in the scope of the destructor's class and if
12086 found shall be accessible and unambiguous. */
12087 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12089 /*global_p=*/false,
12090 /*placement=*/NULL_TREE,
12091 /*alloc_fn=*/NULL_TREE);
12093 if_stmt = begin_if_stmt ();
12094 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12095 current_in_charge_parm,
12098 finish_expr_stmt (exprstmt);
12099 finish_then_clause (if_stmt);
12100 finish_if_stmt (if_stmt);
12103 if (targetm.cxx.cdtor_returns_this ())
12107 val = DECL_ARGUMENTS (current_function_decl);
12108 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12109 DECL_RESULT (current_function_decl), val);
12110 /* Return the address of the object. */
12111 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12112 add_stmt (exprstmt);
12116 /* Do the necessary processing for the beginning of a function body, which
12117 in this case includes member-initializers, but not the catch clauses of
12118 a function-try-block. Currently, this means opening a binding level
12119 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12122 begin_function_body (void)
12126 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12129 if (processing_template_decl)
12130 /* Do nothing now. */;
12132 /* Always keep the BLOCK node associated with the outermost pair of
12133 curly braces of a function. These are needed for correct
12134 operation of dwarfout.c. */
12135 keep_next_level (true);
12137 stmt = begin_compound_stmt (BCS_FN_BODY);
12139 if (processing_template_decl)
12140 /* Do nothing now. */;
12141 else if (DECL_DESTRUCTOR_P (current_function_decl))
12142 begin_destructor_body ();
12147 /* Do the processing for the end of a function body. Currently, this means
12148 closing out the cleanups for fully-constructed bases and members, and in
12149 the case of the destructor, deleting the object if desired. Again, this
12150 is only meaningful for [cd]tors, since they are the only functions where
12151 there is a significant distinction between the main body and any
12152 function catch clauses. Handling, say, main() return semantics here
12153 would be wrong, as flowing off the end of a function catch clause for
12154 main() would also need to return 0. */
12157 finish_function_body (tree compstmt)
12159 if (compstmt == NULL_TREE)
12162 /* Close the block. */
12163 finish_compound_stmt (compstmt);
12165 if (processing_template_decl)
12166 /* Do nothing now. */;
12167 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12168 finish_constructor_body ();
12169 else if (DECL_DESTRUCTOR_P (current_function_decl))
12170 finish_destructor_body ();
12173 /* Given a function, returns the BLOCK corresponding to the outermost level
12174 of curly braces, skipping the artificial block created for constructor
12178 outer_curly_brace_block (tree fndecl)
12180 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12181 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12182 /* Skip the artificial function body block. */
12183 block = BLOCK_SUBBLOCKS (block);
12187 /* Finish up a function declaration and compile that function
12188 all the way to assembler language output. The free the storage
12189 for the function definition.
12191 FLAGS is a bitwise or of the following values:
12193 We just finished processing the body of an in-class inline
12194 function definition. (This processing will have taken place
12195 after the class definition is complete.) */
12198 finish_function (int flags)
12200 tree fndecl = current_function_decl;
12201 tree fntype, ctype = NULL_TREE;
12202 int inclass_inline = (flags & 2) != 0;
12205 /* When we get some parse errors, we can end up without a
12206 current_function_decl, so cope. */
12207 if (fndecl == NULL_TREE)
12208 return error_mark_node;
12210 gcc_assert (!defer_mark_used_calls);
12211 defer_mark_used_calls = true;
12213 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12214 && DECL_VIRTUAL_P (fndecl)
12215 && !processing_template_decl)
12217 tree fnclass = DECL_CONTEXT (fndecl);
12218 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12219 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12222 nested = function_depth > 1;
12223 fntype = TREE_TYPE (fndecl);
12225 /* TREE_READONLY (fndecl) = 1;
12226 This caused &foo to be of type ptr-to-const-function
12227 which then got a warning when stored in a ptr-to-function variable. */
12229 gcc_assert (building_stmt_tree ());
12230 /* The current function is being defined, so its DECL_INITIAL should
12231 be set, and unless there's a multiple definition, it should be
12232 error_mark_node. */
12233 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12235 /* For a cloned function, we've already got all the code we need;
12236 there's no need to add any extra bits. */
12237 if (!DECL_CLONED_FUNCTION_P (fndecl))
12239 if (DECL_MAIN_P (current_function_decl))
12243 /* Make it so that `main' always returns 0 by default (or
12246 stmt = finish_return_stmt (integer_one_node);
12248 stmt = finish_return_stmt (integer_zero_node);
12250 /* Hack. We don't want the middle-end to warn that this
12251 return is unreachable, so put the statement on the
12254 location_t linezero = linemap_line_start (line_table, 0, 1);
12255 SET_EXPR_LOCATION (stmt, linezero);
12259 if (use_eh_spec_block (current_function_decl))
12260 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12261 (TREE_TYPE (current_function_decl)),
12262 current_eh_spec_block);
12265 /* If we're saving up tree structure, tie off the function now. */
12266 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12268 finish_fname_decls ();
12270 /* If this function can't throw any exceptions, remember that. */
12271 if (!processing_template_decl
12272 && !cp_function_chain->can_throw
12273 && !flag_non_call_exceptions
12274 && !DECL_REPLACEABLE_P (fndecl))
12275 TREE_NOTHROW (fndecl) = 1;
12277 /* This must come after expand_function_end because cleanups might
12278 have declarations (from inline functions) that need to go into
12279 this function's blocks. */
12281 /* If the current binding level isn't the outermost binding level
12282 for this function, either there is a bug, or we have experienced
12283 syntax errors and the statement tree is malformed. */
12284 if (current_binding_level->kind != sk_function_parms)
12286 /* Make sure we have already experienced errors. */
12287 gcc_assert (errorcount);
12289 /* Throw away the broken statement tree and extra binding
12291 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12293 while (current_binding_level->kind != sk_function_parms)
12295 if (current_binding_level->kind == sk_class)
12296 pop_nested_class ();
12298 poplevel (0, 0, 0);
12301 poplevel (1, 0, 1);
12303 /* Statements should always be full-expressions at the outermost set
12304 of curly braces for a function. */
12305 gcc_assert (stmts_are_full_exprs_p ());
12307 /* Set up the named return value optimization, if we can. Candidate
12308 variables are selected in check_return_expr. */
12309 if (current_function_return_value)
12311 tree r = current_function_return_value;
12314 if (r != error_mark_node
12315 /* This is only worth doing for fns that return in memory--and
12316 simpler, since we don't have to worry about promoted modes. */
12317 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12318 /* Only allow this for variables declared in the outer scope of
12319 the function so we know that their lifetime always ends with a
12320 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12321 we were to do this optimization in tree-ssa. */
12322 && (outer = outer_curly_brace_block (fndecl))
12323 && chain_member (r, BLOCK_VARS (outer)))
12324 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12326 current_function_return_value = NULL_TREE;
12329 /* Remember that we were in class scope. */
12330 if (current_class_name)
12331 ctype = current_class_type;
12333 /* Must mark the RESULT_DECL as being in this function. */
12334 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12336 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12337 to the FUNCTION_DECL node itself. */
12338 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12340 /* Save away current state, if appropriate. */
12341 if (!processing_template_decl)
12342 save_function_data (fndecl);
12344 /* Complain if there's just no return statement. */
12345 if (warn_return_type
12346 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12347 && !dependent_type_p (TREE_TYPE (fntype))
12348 && !current_function_returns_value && !current_function_returns_null
12349 /* Don't complain if we abort or throw. */
12350 && !current_function_returns_abnormally
12351 && !DECL_NAME (DECL_RESULT (fndecl))
12352 && !TREE_NO_WARNING (fndecl)
12353 /* Structor return values (if any) are set by the compiler. */
12354 && !DECL_CONSTRUCTOR_P (fndecl)
12355 && !DECL_DESTRUCTOR_P (fndecl))
12357 warning (OPT_Wreturn_type,
12358 "no return statement in function returning non-void");
12359 TREE_NO_WARNING (fndecl) = 1;
12362 /* Store the end of the function, so that we get good line number
12363 info for the epilogue. */
12364 cfun->function_end_locus = input_location;
12366 /* Genericize before inlining. */
12367 if (!processing_template_decl)
12369 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12370 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12371 cp_genericize (fndecl);
12372 /* Clear out the bits we don't need. */
12373 f->x_current_class_ptr = NULL;
12374 f->x_current_class_ref = NULL;
12375 f->x_eh_spec_block = NULL;
12376 f->x_in_charge_parm = NULL;
12377 f->x_vtt_parm = NULL;
12378 f->x_return_value = NULL;
12379 f->bindings = NULL;
12380 f->extern_decl_map = NULL;
12382 /* Clear out the bits we don't need. */
12383 local_names = NULL;
12385 /* We're leaving the context of this function, so zap cfun. It's still in
12386 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12388 current_function_decl = NULL;
12390 /* If this is an in-class inline definition, we may have to pop the
12391 bindings for the template parameters that we added in
12392 maybe_begin_member_template_processing when start_function was
12394 if (inclass_inline)
12395 maybe_end_member_template_processing ();
12397 /* Leave the scope of the class. */
12399 pop_nested_class ();
12405 /* Let the error reporting routines know that we're outside a
12406 function. For a nested function, this value is used in
12407 cxx_pop_function_context and then reset via pop_function_context. */
12408 current_function_decl = NULL_TREE;
12410 defer_mark_used_calls = false;
12411 if (deferred_mark_used_calls)
12416 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12418 VEC_free (tree, gc, deferred_mark_used_calls);
12424 /* Create the FUNCTION_DECL for a function definition.
12425 DECLSPECS and DECLARATOR are the parts of the declaration;
12426 they describe the return type and the name of the function,
12427 but twisted together in a fashion that parallels the syntax of C.
12429 This function creates a binding context for the function body
12430 as well as setting up the FUNCTION_DECL in current_function_decl.
12432 Returns a FUNCTION_DECL on success.
12434 If the DECLARATOR is not suitable for a function (it defines a datum
12435 instead), we return 0, which tells yyparse to report a parse error.
12437 May return void_type_node indicating that this method is actually
12438 a friend. See grokfield for more details.
12440 Came here with a `.pushlevel' .
12442 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12443 CHANGES TO CODE IN `grokfield'. */
12446 start_method (cp_decl_specifier_seq *declspecs,
12447 const cp_declarator *declarator, tree attrlist)
12449 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12452 if (fndecl == error_mark_node)
12453 return error_mark_node;
12455 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12457 error ("invalid member function declaration");
12458 return error_mark_node;
12462 cplus_decl_attributes (&fndecl, attrlist, 0);
12464 /* Pass friends other than inline friend functions back. */
12465 if (fndecl == void_type_node)
12468 if (DECL_IN_AGGR_P (fndecl))
12470 if (DECL_CONTEXT (fndecl)
12471 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12472 error ("%qD is already defined in class %qT", fndecl,
12473 DECL_CONTEXT (fndecl));
12474 return error_mark_node;
12477 check_template_shadow (fndecl);
12479 DECL_DECLARED_INLINE_P (fndecl) = 1;
12480 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12482 /* We process method specializations in finish_struct_1. */
12483 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12485 fndecl = push_template_decl (fndecl);
12486 if (fndecl == error_mark_node)
12490 if (! DECL_FRIEND_P (fndecl))
12492 if (TREE_CHAIN (fndecl))
12494 fndecl = copy_node (fndecl);
12495 TREE_CHAIN (fndecl) = NULL_TREE;
12499 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12501 /* Make a place for the parms. */
12502 begin_scope (sk_function_parms, fndecl);
12504 DECL_IN_AGGR_P (fndecl) = 1;
12508 /* Go through the motions of finishing a function definition.
12509 We don't compile this method until after the whole class has
12512 FINISH_METHOD must return something that looks as though it
12513 came from GROKFIELD (since we are defining a method, after all).
12515 This is called after parsing the body of the function definition.
12516 STMTS is the chain of statements that makes up the function body.
12518 DECL is the ..._DECL that `start_method' provided. */
12521 finish_method (tree decl)
12523 tree fndecl = decl;
12528 if (decl == void_type_node)
12531 old_initial = DECL_INITIAL (fndecl);
12533 /* Undo the level for the parms (from start_method).
12534 This is like poplevel, but it causes nothing to be
12535 saved. Saving information here confuses symbol-table
12536 output routines. Besides, this information will
12537 be correctly output when this method is actually
12540 /* Clear out the meanings of the local variables of this level;
12541 also record in each decl which block it belongs to. */
12543 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12545 if (DECL_NAME (link) != NULL_TREE)
12546 pop_binding (DECL_NAME (link), link);
12547 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12548 DECL_CONTEXT (link) = NULL_TREE;
12551 poplevel (0, 0, 0);
12553 DECL_INITIAL (fndecl) = old_initial;
12559 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12560 we can lay it out later, when and if its type becomes complete. */
12563 maybe_register_incomplete_var (tree var)
12565 gcc_assert (TREE_CODE (var) == VAR_DECL);
12567 /* Keep track of variables with incomplete types. */
12568 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12569 && DECL_EXTERNAL (var))
12571 tree inner_type = TREE_TYPE (var);
12573 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12574 inner_type = TREE_TYPE (inner_type);
12575 inner_type = TYPE_MAIN_VARIANT (inner_type);
12577 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12578 /* RTTI TD entries are created while defining the type_info. */
12579 || (TYPE_LANG_SPECIFIC (inner_type)
12580 && TYPE_BEING_DEFINED (inner_type)))
12581 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12585 /* Called when a class type (given by TYPE) is defined. If there are
12586 any existing VAR_DECLs whose type has been completed by this
12587 declaration, update them now. */
12590 complete_vars (tree type)
12592 tree *list = &incomplete_vars;
12594 gcc_assert (CLASS_TYPE_P (type));
12597 if (same_type_p (type, TREE_PURPOSE (*list)))
12599 tree var = TREE_VALUE (*list);
12600 tree type = TREE_TYPE (var);
12601 /* Complete the type of the variable. The VAR_DECL itself
12602 will be laid out in expand_expr. */
12603 complete_type (type);
12604 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12605 /* Remove this entry from the list. */
12606 *list = TREE_CHAIN (*list);
12609 list = &TREE_CHAIN (*list);
12612 /* Check for pending declarations which may have abstract type. */
12613 complete_type_check_abstract (type);
12616 /* If DECL is of a type which needs a cleanup, build and return an
12617 expression to perform that cleanup here. Return NULL_TREE if no
12618 cleanup need be done. */
12621 cxx_maybe_build_cleanup (tree decl)
12627 /* Assume no cleanup is required. */
12628 cleanup = NULL_TREE;
12630 if (error_operand_p (decl))
12633 /* Handle "__attribute__((cleanup))". We run the cleanup function
12634 before the destructor since the destructor is what actually
12635 terminates the lifetime of the object. */
12636 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12643 /* Get the name specified by the user for the cleanup function. */
12644 id = TREE_VALUE (TREE_VALUE (attr));
12645 /* Look up the name to find the cleanup function to call. It is
12646 important to use lookup_name here because that is what is
12647 used in c-common.c:handle_cleanup_attribute when performing
12648 initial checks on the attribute. Note that those checks
12649 include ensuring that the function found is not an overloaded
12650 function, or an object with an overloaded call operator,
12651 etc.; we can rely on the fact that the function found is an
12652 ordinary FUNCTION_DECL. */
12653 fn = lookup_name (id);
12654 arg = build_address (decl);
12656 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12658 tf_warning_or_error);
12660 /* Handle ordinary C++ destructors. */
12661 type = TREE_TYPE (decl);
12662 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12664 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12665 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12666 && CLASSTYPE_VBASECLASSES (type));
12670 if (TREE_CODE (type) == ARRAY_TYPE)
12673 addr = build_address (decl);
12675 /* Optimize for space over speed here. */
12676 if (!has_vbases || flag_expensive_optimizations)
12677 flags |= LOOKUP_NONVIRTUAL;
12679 call = build_delete (TREE_TYPE (addr), addr,
12680 sfk_complete_destructor, flags, 0);
12682 cleanup = build_compound_expr (input_location, cleanup, call);
12690 /* When a stmt has been parsed, this function is called. */
12697 /* DECL was originally constructed as a non-static member function,
12698 but turned out to be static. Update it accordingly. */
12701 revert_static_member_fn (tree decl)
12704 tree function = TREE_TYPE (decl);
12705 tree args = TYPE_ARG_TYPES (function);
12707 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12708 != TYPE_UNQUALIFIED)
12709 error ("static member function %q#D declared with type qualifiers", decl);
12711 args = TREE_CHAIN (args);
12712 tmp = build_function_type (TREE_TYPE (function), args);
12713 tmp = build_qualified_type (tmp, cp_type_quals (function));
12714 tmp = build_exception_variant (tmp,
12715 TYPE_RAISES_EXCEPTIONS (function));
12716 TREE_TYPE (decl) = tmp;
12717 if (DECL_ARGUMENTS (decl))
12718 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12719 DECL_STATIC_FUNCTION_P (decl) = 1;
12722 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12723 one of the language-independent trees. */
12725 enum cp_tree_node_structure_enum
12726 cp_tree_node_structure (union lang_tree_node * t)
12728 switch (TREE_CODE (&t->generic))
12730 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12731 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12732 case OVERLOAD: return TS_CP_OVERLOAD;
12733 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12734 case PTRMEM_CST: return TS_CP_PTRMEM;
12735 case BASELINK: return TS_CP_BASELINK;
12736 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12737 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12738 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12739 default: return TS_CP_GENERIC;
12743 /* Build the void_list_node (void_type_node having been created). */
12745 build_void_list_node (void)
12747 tree t = build_tree_list (NULL_TREE, void_type_node);
12752 cp_missing_noreturn_ok_p (tree decl)
12754 /* A missing noreturn is ok for the `main' function. */
12755 return DECL_MAIN_P (decl);
12758 /* Return the COMDAT group into which DECL should be placed. */
12761 cxx_comdat_group (tree decl)
12765 /* Virtual tables, construction virtual tables, and virtual table
12766 tables all go in a single COMDAT group, named after the primary
12768 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12769 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12770 /* For all other DECLs, the COMDAT group is the mangled name of the
12771 declaration itself. */
12774 while (DECL_THUNK_P (decl))
12776 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12777 into the same section as the target function. In that case
12778 we must return target's name. */
12779 tree target = THUNK_TARGET (decl);
12780 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12781 && DECL_SECTION_NAME (target) != NULL
12782 && DECL_ONE_ONLY (target))
12787 name = DECL_ASSEMBLER_NAME (decl);
12793 #include "gt-cp-decl.h"