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 (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 (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 (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)->decl_flags.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 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
920 && ! (DECL_EXTERN_C_P (newdecl)
921 && DECL_EXTERN_C_P (olddecl)))
924 if (TREE_CODE (f1) != TREE_CODE (f2))
927 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
929 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
930 && (DECL_BUILT_IN (olddecl)
931 #ifndef NO_IMPLICIT_EXTERN_C
932 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
933 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
937 types_match = self_promoting_args_p (p1);
938 if (p1 == void_list_node)
939 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
941 #ifndef NO_IMPLICIT_EXTERN_C
942 else if (p1 == NULL_TREE
943 && (DECL_EXTERN_C_P (olddecl)
944 && DECL_IN_SYSTEM_HEADER (olddecl)
945 && !DECL_CLASS_SCOPE_P (olddecl))
946 && (DECL_EXTERN_C_P (newdecl)
947 && DECL_IN_SYSTEM_HEADER (newdecl)
948 && !DECL_CLASS_SCOPE_P (newdecl)))
950 types_match = self_promoting_args_p (p2);
951 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 types_match = compparms (p1, p2);
960 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
962 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
963 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
966 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
967 DECL_TEMPLATE_PARMS (olddecl)))
970 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
971 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
972 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
974 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
975 DECL_TEMPLATE_RESULT (newdecl));
979 /* Need to check scope for variable declaration (VAR_DECL).
980 For typedef (TYPE_DECL), scope is ignored. */
981 if (TREE_CODE (newdecl) == VAR_DECL
982 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
984 Two declarations for an object with C language linkage
985 with the same name (ignoring the namespace that qualify
986 it) that appear in different namespace scopes refer to
988 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
991 if (TREE_TYPE (newdecl) == error_mark_node)
992 types_match = TREE_TYPE (olddecl) == error_mark_node;
993 else if (TREE_TYPE (olddecl) == NULL_TREE)
994 types_match = TREE_TYPE (newdecl) == NULL_TREE;
995 else if (TREE_TYPE (newdecl) == NULL_TREE)
998 types_match = comptypes (TREE_TYPE (newdecl),
1000 COMPARE_REDECLARATION);
1006 /* If NEWDECL is `static' and an `extern' was seen previously,
1007 warn about it. OLDDECL is the previous declaration.
1009 Note that this does not apply to the C++ case of declaring
1010 a variable `extern const' and then later `const'.
1012 Don't complain about built-in functions, since they are beyond
1013 the user's control. */
1016 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1020 if (TREE_CODE (newdecl) == TYPE_DECL
1021 || TREE_CODE (newdecl) == TEMPLATE_DECL
1022 || TREE_CODE (newdecl) == CONST_DECL
1023 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1026 /* Don't get confused by static member functions; that's a different
1028 if (TREE_CODE (newdecl) == FUNCTION_DECL
1029 && DECL_STATIC_FUNCTION_P (newdecl))
1032 /* If the old declaration was `static', or the new one isn't, then
1033 then everything is OK. */
1034 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1037 /* It's OK to declare a builtin function as `static'. */
1038 if (TREE_CODE (olddecl) == FUNCTION_DECL
1039 && DECL_ARTIFICIAL (olddecl))
1042 name = DECL_ASSEMBLER_NAME (newdecl);
1043 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1044 permerror (input_location, "previous declaration of %q+D", olddecl);
1047 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1048 function templates. If their exception specifications do not
1049 match, issue a diagnostic. */
1052 check_redeclaration_exception_specification (tree new_decl,
1057 tree new_exceptions;
1058 tree old_exceptions;
1060 new_type = TREE_TYPE (new_decl);
1061 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1062 old_type = TREE_TYPE (old_decl);
1063 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1067 If any declaration of a function has an exception-specification,
1068 all declarations, including the definition and an explicit
1069 specialization, of that function shall have an
1070 exception-specification with the same set of type-ids. */
1071 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1072 && ! DECL_IS_BUILTIN (old_decl)
1074 && !comp_except_specs (new_exceptions, old_exceptions,
1077 error ("declaration of %qF throws different exceptions", new_decl);
1078 error ("from previous declaration %q+F", old_decl);
1082 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1083 && lookup_attribute ("gnu_inline", \
1084 DECL_ATTRIBUTES (fn)))
1086 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1087 If the redeclaration is invalid, a diagnostic is issued, and the
1088 error_mark_node is returned. Otherwise, OLDDECL is returned.
1090 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1093 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1096 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1098 unsigned olddecl_uid = DECL_UID (olddecl);
1099 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1100 int new_defines_function = 0;
1103 if (newdecl == olddecl)
1106 types_match = decls_match (newdecl, olddecl);
1108 /* If either the type of the new decl or the type of the old decl is an
1109 error_mark_node, then that implies that we have already issued an
1110 error (earlier) for some bogus type specification, and in that case,
1111 it is rather pointless to harass the user with yet more error message
1112 about the same declaration, so just pretend the types match here. */
1113 if (TREE_TYPE (newdecl) == error_mark_node
1114 || TREE_TYPE (olddecl) == error_mark_node)
1115 return error_mark_node;
1117 if (DECL_P (olddecl)
1118 && TREE_CODE (newdecl) == FUNCTION_DECL
1119 && TREE_CODE (olddecl) == FUNCTION_DECL
1120 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1122 if (DECL_DECLARED_INLINE_P (newdecl)
1123 && DECL_UNINLINABLE (newdecl)
1124 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1125 /* Already warned elsewhere. */;
1126 else if (DECL_DECLARED_INLINE_P (olddecl)
1127 && DECL_UNINLINABLE (olddecl)
1128 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1129 /* Already warned. */;
1130 else if (DECL_DECLARED_INLINE_P (newdecl)
1131 && DECL_UNINLINABLE (olddecl)
1132 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1134 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1136 warning (OPT_Wattributes, "previous declaration of %q+D "
1137 "with attribute noinline", olddecl);
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (newdecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1143 warning (OPT_Wattributes, "function %q+D redeclared with "
1144 "attribute noinline", newdecl);
1145 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1150 /* Check for redeclaration and other discrepancies. */
1151 if (TREE_CODE (olddecl) == FUNCTION_DECL
1152 && DECL_ARTIFICIAL (olddecl))
1154 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1155 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1157 /* Avoid warnings redeclaring built-ins which have not been
1158 explicitly declared. */
1159 if (DECL_ANTICIPATED (olddecl))
1162 /* If you declare a built-in or predefined function name as static,
1163 the old definition is overridden, but optionally warn this was a
1164 bad choice of name. */
1165 if (! TREE_PUBLIC (newdecl))
1167 warning (OPT_Wshadow, "shadowing %s function %q#D",
1168 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1170 /* Discard the old built-in function. */
1173 /* If the built-in is not ansi, then programs can override
1174 it even globally without an error. */
1175 else if (! DECL_BUILT_IN (olddecl))
1176 warning (0, "library function %q#D redeclared as non-function %q#D",
1180 error ("declaration of %q#D", newdecl);
1181 error ("conflicts with built-in declaration %q#D",
1186 else if (!types_match)
1188 /* Avoid warnings redeclaring built-ins which have not been
1189 explicitly declared. */
1190 if (DECL_ANTICIPATED (olddecl))
1192 /* Deal with fileptr_type_node. FILE type is not known
1193 at the time we create the builtins. */
1196 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1197 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1199 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1202 else if (TREE_VALUE (t2) == fileptr_type_node)
1204 tree t = TREE_VALUE (t1);
1206 if (TREE_CODE (t) == POINTER_TYPE
1207 && TYPE_NAME (TREE_TYPE (t))
1208 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1209 == get_identifier ("FILE")
1210 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1212 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1215 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1216 types_match = decls_match (newdecl, olddecl);
1218 return duplicate_decls (newdecl, olddecl,
1220 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1223 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1226 else if ((DECL_EXTERN_C_P (newdecl)
1227 && DECL_EXTERN_C_P (olddecl))
1228 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1231 /* A near match; override the builtin. */
1233 if (TREE_PUBLIC (newdecl))
1235 warning (0, "new declaration %q#D", newdecl);
1236 warning (0, "ambiguates built-in declaration %q#D",
1240 warning (OPT_Wshadow, "shadowing %s function %q#D",
1241 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1245 /* Discard the old built-in function. */
1248 /* Replace the old RTL to avoid problems with inlining. */
1249 COPY_DECL_RTL (newdecl, olddecl);
1251 /* Even if the types match, prefer the new declarations type for
1252 built-ins which have not been explicitly declared, for
1253 exception lists, etc... */
1254 else if (DECL_ANTICIPATED (olddecl))
1256 tree type = TREE_TYPE (newdecl);
1257 tree attribs = (*targetm.merge_type_attributes)
1258 (TREE_TYPE (olddecl), type);
1260 type = cp_build_type_attribute_variant (type, attribs);
1261 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1264 /* If a function is explicitly declared "throw ()", propagate that to
1265 the corresponding builtin. */
1266 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1267 && DECL_ANTICIPATED (olddecl)
1268 && TREE_NOTHROW (newdecl)
1269 && !TREE_NOTHROW (olddecl)
1270 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1271 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1273 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1275 /* Whether or not the builtin can throw exceptions has no
1276 bearing on this declarator. */
1277 TREE_NOTHROW (olddecl) = 0;
1279 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1281 /* If a builtin function is redeclared as `static', merge
1282 the declarations, but make the original one static. */
1283 DECL_THIS_STATIC (olddecl) = 1;
1284 TREE_PUBLIC (olddecl) = 0;
1286 /* Make the old declaration consistent with the new one so
1287 that all remnants of the builtin-ness of this function
1288 will be banished. */
1289 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1290 COPY_DECL_RTL (newdecl, olddecl);
1293 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1295 /* C++ Standard, 3.3, clause 4:
1296 "[Note: a namespace name or a class template name must be unique
1297 in its declarative region (7.3.2, clause 14). ]" */
1298 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1299 && TREE_CODE (newdecl) != NAMESPACE_DECL
1300 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1301 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1302 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1303 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1305 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1306 && TREE_CODE (newdecl) != TYPE_DECL)
1307 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1308 && TREE_CODE (olddecl) != TYPE_DECL))
1310 /* We do nothing special here, because C++ does such nasty
1311 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1312 get shadowed, and know that if we need to find a TYPE_DECL
1313 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1314 slot of the identifier. */
1318 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1319 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1320 || (TREE_CODE (olddecl) == FUNCTION_DECL
1321 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1325 error ("%q#D redeclared as different kind of symbol", newdecl);
1326 if (TREE_CODE (olddecl) == TREE_LIST)
1327 olddecl = TREE_VALUE (olddecl);
1328 error ("previous declaration of %q+#D", olddecl);
1330 return error_mark_node;
1332 else if (!types_match)
1334 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1335 /* These are certainly not duplicate declarations; they're
1336 from different scopes. */
1339 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1341 /* The name of a class template may not be declared to refer to
1342 any other template, class, function, object, namespace, value,
1343 or type in the same scope. */
1344 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1345 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1347 error ("declaration of template %q#D", newdecl);
1348 error ("conflicts with previous declaration %q+#D", olddecl);
1350 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1351 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1352 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1353 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1354 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1355 DECL_TEMPLATE_PARMS (olddecl))
1356 /* Template functions can be disambiguated by
1358 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1359 TREE_TYPE (TREE_TYPE (olddecl))))
1361 error ("new declaration %q#D", newdecl);
1362 error ("ambiguates old declaration %q+#D", olddecl);
1366 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1368 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1370 error ("declaration of C function %q#D conflicts with",
1372 error ("previous declaration %q+#D here", olddecl);
1374 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1377 error ("new declaration %q#D", newdecl);
1378 error ("ambiguates old declaration %q+#D", olddecl);
1379 return error_mark_node;
1386 error ("conflicting declaration %q#D", newdecl);
1387 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1388 return error_mark_node;
1391 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1392 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1393 && (!DECL_TEMPLATE_INFO (newdecl)
1394 || (DECL_TI_TEMPLATE (newdecl)
1395 != DECL_TI_TEMPLATE (olddecl))))
1396 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1397 && (!DECL_TEMPLATE_INFO (olddecl)
1398 || (DECL_TI_TEMPLATE (olddecl)
1399 != DECL_TI_TEMPLATE (newdecl))))))
1400 /* It's OK to have a template specialization and a non-template
1401 with the same type, or to have specializations of two
1402 different templates with the same type. Note that if one is a
1403 specialization, and the other is an instantiation of the same
1404 template, that we do not exit at this point. That situation
1405 can occur if we instantiate a template class, and then
1406 specialize one of its methods. This situation is valid, but
1407 the declarations must be merged in the usual way. */
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1411 && !DECL_USE_TEMPLATE (newdecl))
1412 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1413 && !DECL_USE_TEMPLATE (olddecl))))
1414 /* One of the declarations is a template instantiation, and the
1415 other is not a template at all. That's OK. */
1417 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1419 /* In [namespace.alias] we have:
1421 In a declarative region, a namespace-alias-definition can be
1422 used to redefine a namespace-alias declared in that declarative
1423 region to refer only to the namespace to which it already
1426 Therefore, if we encounter a second alias directive for the same
1427 alias, we can just ignore the second directive. */
1428 if (DECL_NAMESPACE_ALIAS (newdecl)
1429 && (DECL_NAMESPACE_ALIAS (newdecl)
1430 == DECL_NAMESPACE_ALIAS (olddecl)))
1432 /* [namespace.alias]
1434 A namespace-name or namespace-alias shall not be declared as
1435 the name of any other entity in the same declarative region.
1436 A namespace-name defined at global scope shall not be
1437 declared as the name of any other entity in any global scope
1439 error ("declaration of namespace %qD conflicts with", newdecl);
1440 error ("previous declaration of namespace %q+D here", olddecl);
1441 return error_mark_node;
1445 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1448 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1449 if (DECL_NAME (olddecl) != NULL_TREE)
1450 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1451 ? "%q+#D previously defined here"
1452 : "%q+#D previously declared here", olddecl);
1453 return error_mark_node;
1455 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1456 && DECL_INITIAL (olddecl) != NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1458 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1460 /* Prototype decl follows defn w/o prototype. */
1461 warning (0, "prototype for %q+#D", newdecl);
1462 warning (0, "%Jfollows non-prototype definition here", olddecl);
1464 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1465 || TREE_CODE (olddecl) == VAR_DECL)
1466 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1469 If two declarations of the same function or object
1470 specify different linkage-specifications ..., the program
1471 is ill-formed.... Except for functions with C++ linkage,
1472 a function declaration without a linkage specification
1473 shall not precede the first linkage specification for
1474 that function. A function can be declared without a
1475 linkage specification after an explicit linkage
1476 specification has been seen; the linkage explicitly
1477 specified in the earlier declaration is not affected by
1478 such a function declaration.
1480 DR 563 raises the question why the restrictions on
1481 functions should not also apply to objects. Older
1482 versions of G++ silently ignore the linkage-specification
1490 which is clearly wrong. Therefore, we now treat objects
1492 if (current_lang_depth () == 0)
1494 /* There is no explicit linkage-specification, so we use
1495 the linkage from the previous declaration. */
1496 if (!DECL_LANG_SPECIFIC (newdecl))
1497 retrofit_lang_decl (newdecl);
1498 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1502 error ("previous declaration of %q+#D with %qL linkage",
1503 olddecl, DECL_LANGUAGE (olddecl));
1504 error ("conflicts with new declaration with %qL linkage",
1505 DECL_LANGUAGE (newdecl));
1509 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1511 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1513 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1514 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1517 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1518 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1520 for (; t1 && t1 != void_list_node;
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1522 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1524 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1527 permerror (input_location, "default argument given for parameter %d of %q#D",
1529 permerror (input_location, "after previous specification in %q+#D", olddecl);
1533 error ("default argument given for parameter %d of %q#D",
1535 error ("after previous specification in %q+#D",
1542 /* Do not merge an implicit typedef with an explicit one. In:
1546 typedef class A A __attribute__ ((foo));
1548 the attribute should apply only to the typedef. */
1549 if (TREE_CODE (olddecl) == TYPE_DECL
1550 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1551 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1554 /* If new decl is `static' and an `extern' was seen previously,
1556 warn_extern_redeclared_static (newdecl, olddecl);
1558 /* We have committed to returning 1 at this point. */
1559 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1561 /* Now that functions must hold information normally held
1562 by field decls, there is extra work to do so that
1563 declaration information does not get destroyed during
1565 if (DECL_VINDEX (olddecl))
1566 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1567 if (DECL_CONTEXT (olddecl))
1568 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1569 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1570 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1571 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1572 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1573 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1594 if (DECL_DELETED_FN (newdecl))
1596 error ("deleted definition of %qD", newdecl);
1597 error ("after previous declaration %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 DECL_ATTRIBUTES (old_result)
1632 = (*targetm.merge_decl_attributes) (old_result, new_result);
1634 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1636 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1637 && DECL_INITIAL (new_result))
1639 if (DECL_INITIAL (old_result))
1640 DECL_UNINLINABLE (old_result) = 1;
1642 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1643 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1644 DECL_NOT_REALLY_EXTERN (old_result)
1645 = DECL_NOT_REALLY_EXTERN (new_result);
1646 DECL_INTERFACE_KNOWN (old_result)
1647 = DECL_INTERFACE_KNOWN (new_result);
1648 DECL_DECLARED_INLINE_P (old_result)
1649 = DECL_DECLARED_INLINE_P (new_result);
1650 DECL_DISREGARD_INLINE_LIMITS (old_result)
1651 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1656 DECL_DECLARED_INLINE_P (old_result)
1657 |= DECL_DECLARED_INLINE_P (new_result);
1658 DECL_DISREGARD_INLINE_LIMITS (old_result)
1659 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1660 check_redeclaration_exception_specification (newdecl, olddecl);
1664 /* If the new declaration is a definition, update the file and
1665 line information on the declaration, and also make
1666 the old declaration the same definition. */
1667 if (DECL_INITIAL (new_result) != NULL_TREE)
1669 DECL_SOURCE_LOCATION (olddecl)
1670 = DECL_SOURCE_LOCATION (old_result)
1671 = DECL_SOURCE_LOCATION (newdecl);
1672 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1673 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1676 DECL_ARGUMENTS (old_result)
1677 = DECL_ARGUMENTS (new_result);
1678 for (parm = DECL_ARGUMENTS (old_result); parm;
1679 parm = TREE_CHAIN (parm))
1680 DECL_CONTEXT (parm) = old_result;
1689 /* Automatically handles default parameters. */
1690 tree oldtype = TREE_TYPE (olddecl);
1693 /* Merge the data types specified in the two decls. */
1694 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1696 /* If merge_types produces a non-typedef type, just use the old type. */
1697 if (TREE_CODE (newdecl) == TYPE_DECL
1698 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1701 if (TREE_CODE (newdecl) == VAR_DECL)
1703 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1704 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1705 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1706 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1707 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1708 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1710 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1711 if (DECL_LANG_SPECIFIC (olddecl)
1712 && CP_DECL_THREADPRIVATE_P (olddecl))
1714 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1715 if (!DECL_LANG_SPECIFIC (newdecl))
1716 retrofit_lang_decl (newdecl);
1718 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1719 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1723 /* Do this after calling `merge_types' so that default
1724 parameters don't confuse us. */
1725 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1726 check_redeclaration_exception_specification (newdecl, olddecl);
1727 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1729 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1730 check_default_args (newdecl);
1732 /* Lay the type out, unless already done. */
1733 if (! same_type_p (newtype, oldtype)
1734 && TREE_TYPE (newdecl) != error_mark_node
1735 && !(processing_template_decl && uses_template_parms (newdecl)))
1736 layout_type (TREE_TYPE (newdecl));
1738 if ((TREE_CODE (newdecl) == VAR_DECL
1739 || TREE_CODE (newdecl) == PARM_DECL
1740 || TREE_CODE (newdecl) == RESULT_DECL
1741 || TREE_CODE (newdecl) == FIELD_DECL
1742 || TREE_CODE (newdecl) == TYPE_DECL)
1743 && !(processing_template_decl && uses_template_parms (newdecl)))
1744 layout_decl (newdecl, 0);
1746 /* Merge the type qualifiers. */
1747 if (TREE_READONLY (newdecl))
1748 TREE_READONLY (olddecl) = 1;
1749 if (TREE_THIS_VOLATILE (newdecl))
1750 TREE_THIS_VOLATILE (olddecl) = 1;
1751 if (TREE_NOTHROW (newdecl))
1752 TREE_NOTHROW (olddecl) = 1;
1754 /* Merge deprecatedness. */
1755 if (TREE_DEPRECATED (newdecl))
1756 TREE_DEPRECATED (olddecl) = 1;
1758 /* Preserve function specific target and optimization options */
1759 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1761 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1762 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1763 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1764 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1766 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1767 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1768 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1769 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1772 /* Merge the initialization information. */
1773 if (DECL_INITIAL (newdecl) == NULL_TREE
1774 && DECL_INITIAL (olddecl) != NULL_TREE)
1776 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1777 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1778 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1779 && DECL_LANG_SPECIFIC (newdecl)
1780 && DECL_LANG_SPECIFIC (olddecl))
1782 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1783 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1787 /* Merge the section attribute.
1788 We want to issue an error if the sections conflict but that must be
1789 done later in decl_attributes since we are called before attributes
1791 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1792 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1794 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1796 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1797 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1798 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1799 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1800 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1801 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1802 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1803 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1804 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1805 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1806 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1807 /* Keep the old RTL. */
1808 COPY_DECL_RTL (olddecl, newdecl);
1810 else if (TREE_CODE (newdecl) == VAR_DECL
1811 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1813 /* Keep the old RTL. We cannot keep the old RTL if the old
1814 declaration was for an incomplete object and the new
1815 declaration is not since many attributes of the RTL will
1817 COPY_DECL_RTL (olddecl, newdecl);
1820 /* If cannot merge, then use the new type and qualifiers,
1821 and don't preserve the old rtl. */
1824 /* Clean out any memory we had of the old declaration. */
1825 tree oldstatic = value_member (olddecl, static_aggregates);
1827 TREE_VALUE (oldstatic) = error_mark_node;
1829 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1830 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1831 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1832 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1835 /* Merge the storage class information. */
1836 merge_weak (newdecl, olddecl);
1838 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1839 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1840 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1841 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1842 if (! DECL_EXTERNAL (olddecl))
1843 DECL_EXTERNAL (newdecl) = 0;
1845 new_template = NULL_TREE;
1846 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1848 bool new_redefines_gnu_inline = false;
1850 if (new_defines_function
1851 && ((DECL_INTERFACE_KNOWN (olddecl)
1852 && TREE_CODE (olddecl) == FUNCTION_DECL)
1853 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1854 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1855 == FUNCTION_DECL))))
1859 if (TREE_CODE (fn) == TEMPLATE_DECL)
1860 fn = DECL_TEMPLATE_RESULT (olddecl);
1862 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1865 if (!new_redefines_gnu_inline)
1867 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1868 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1869 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1871 DECL_TEMPLATE_INSTANTIATED (newdecl)
1872 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1874 /* If the OLDDECL is an instantiation and/or specialization,
1875 then the NEWDECL must be too. But, it may not yet be marked
1876 as such if the caller has created NEWDECL, but has not yet
1877 figured out that it is a redeclaration. */
1878 if (!DECL_USE_TEMPLATE (newdecl))
1879 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1881 /* Don't really know how much of the language-specific
1882 values we should copy from old to new. */
1883 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1884 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1885 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1886 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1887 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1888 if (DECL_TEMPLATE_INFO (newdecl))
1889 new_template = DECL_TI_TEMPLATE (newdecl);
1890 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1891 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1892 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1893 olddecl_friend = DECL_FRIEND_P (olddecl);
1894 hidden_friend = (DECL_ANTICIPATED (olddecl)
1895 && DECL_HIDDEN_FRIEND_P (olddecl)
1896 && newdecl_is_friend);
1898 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1899 if (TREE_CODE (newdecl) == FUNCTION_DECL
1900 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1902 DECL_BEFRIENDING_CLASSES (newdecl)
1903 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1904 DECL_BEFRIENDING_CLASSES (olddecl));
1905 /* DECL_THUNKS is only valid for virtual functions,
1906 otherwise it is a DECL_FRIEND_CONTEXT. */
1907 if (DECL_VIRTUAL_P (newdecl))
1908 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1916 /* Merge parameter attributes. */
1917 tree oldarg, newarg;
1918 for (oldarg = DECL_ARGUMENTS(olddecl),
1919 newarg = DECL_ARGUMENTS(newdecl);
1921 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1922 DECL_ATTRIBUTES (newarg)
1923 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1924 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1927 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1928 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1930 /* If newdecl is not a specialization, then it is not a
1931 template-related function at all. And that means that we
1932 should have exited above, returning 0. */
1933 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1935 if (TREE_USED (olddecl))
1936 /* From [temp.expl.spec]:
1938 If a template, a member template or the member of a class
1939 template is explicitly specialized then that
1940 specialization shall be declared before the first use of
1941 that specialization that would cause an implicit
1942 instantiation to take place, in every translation unit in
1943 which such a use occurs. */
1944 error ("explicit specialization of %qD after first use",
1947 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1949 /* Don't propagate visibility from the template to the
1950 specialization here. We'll do that in determine_visibility if
1952 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1954 /* [temp.expl.spec/14] We don't inline explicit specialization
1955 just because the primary template says so. */
1957 else if (new_defines_function && DECL_INITIAL (olddecl))
1959 /* Never inline re-defined extern inline functions.
1960 FIXME: this could be better handled by keeping both
1961 function as separate declarations. */
1962 DECL_UNINLINABLE (newdecl) = 1;
1966 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1967 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1969 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1971 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1972 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1974 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1975 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1976 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1977 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1980 /* Preserve abstractness on cloned [cd]tors. */
1981 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1983 /* Update newdecl's parms to point at olddecl. */
1984 for (parm = DECL_ARGUMENTS (newdecl); parm;
1985 parm = TREE_CHAIN (parm))
1986 DECL_CONTEXT (parm) = olddecl;
1990 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1991 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1992 COPY_DECL_RTL (newdecl, olddecl);
1994 if (! types_match || new_defines_function)
1996 /* These need to be copied so that the names are available.
1997 Note that if the types do match, we'll preserve inline
1998 info and other bits, but if not, we won't. */
1999 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2000 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2002 if (new_defines_function)
2003 /* If defining a function declared with other language
2004 linkage, use the previously declared language linkage. */
2005 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2006 else if (types_match)
2008 /* If redeclaring a builtin function, and not a definition,
2009 it stays built in. */
2010 if (DECL_BUILT_IN (olddecl))
2012 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2013 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2014 /* If we're keeping the built-in definition, keep the rtl,
2015 regardless of declaration matches. */
2016 COPY_DECL_RTL (olddecl, newdecl);
2019 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2020 /* Don't clear out the arguments if we're just redeclaring a
2022 if (DECL_ARGUMENTS (olddecl))
2023 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2026 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2027 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2029 /* Now preserve various other info from the definition. */
2030 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2031 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2032 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2033 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2035 /* Warn about conflicting visibility specifications. */
2036 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2037 && DECL_VISIBILITY_SPECIFIED (newdecl)
2038 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2040 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2041 "because it", newdecl);
2042 warning (OPT_Wattributes, "%Jconflicts with previous "
2043 "declaration here", olddecl);
2045 /* Choose the declaration which specified visibility. */
2046 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2048 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2049 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2051 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2052 so keep this behavior. */
2053 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2055 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2056 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2059 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2060 with that from NEWDECL below. */
2061 if (DECL_LANG_SPECIFIC (olddecl))
2063 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2064 != DECL_LANG_SPECIFIC (newdecl));
2065 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2068 /* Merge the USED information. */
2069 if (TREE_USED (olddecl))
2070 TREE_USED (newdecl) = 1;
2071 else if (TREE_USED (newdecl))
2072 TREE_USED (olddecl) = 1;
2074 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2078 function_size = sizeof (struct tree_decl_common);
2080 memcpy ((char *) olddecl + sizeof (struct tree_common),
2081 (char *) newdecl + sizeof (struct tree_common),
2082 function_size - sizeof (struct tree_common));
2084 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2085 (char *) newdecl + sizeof (struct tree_decl_common),
2086 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2088 /* If newdecl is a template instantiation, it is possible that
2089 the following sequence of events has occurred:
2091 o A friend function was declared in a class template. The
2092 class template was instantiated.
2094 o The instantiation of the friend declaration was
2095 recorded on the instantiation list, and is newdecl.
2097 o Later, however, instantiate_class_template called pushdecl
2098 on the newdecl to perform name injection. But, pushdecl in
2099 turn called duplicate_decls when it discovered that another
2100 declaration of a global function with the same name already
2103 o Here, in duplicate_decls, we decided to clobber newdecl.
2105 If we're going to do that, we'd better make sure that
2106 olddecl, and not newdecl, is on the list of
2107 instantiations so that if we try to do the instantiation
2108 again we won't get the clobbered declaration. */
2109 reregister_specialization (newdecl,
2115 size_t size = tree_code_size (TREE_CODE (olddecl));
2116 memcpy ((char *) olddecl + sizeof (struct tree_common),
2117 (char *) newdecl + sizeof (struct tree_common),
2118 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2119 switch (TREE_CODE (olddecl))
2129 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2130 (char *) newdecl + sizeof (struct tree_decl_common),
2131 size - sizeof (struct tree_decl_common)
2132 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2136 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2137 (char *) newdecl + sizeof (struct tree_decl_common),
2138 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2139 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2143 DECL_UID (olddecl) = olddecl_uid;
2145 DECL_FRIEND_P (olddecl) = 1;
2148 DECL_ANTICIPATED (olddecl) = 1;
2149 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2152 /* NEWDECL contains the merged attribute lists.
2153 Update OLDDECL to be the same. */
2154 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2156 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2157 so that encode_section_info has a chance to look at the new decl
2158 flags and attributes. */
2159 if (DECL_RTL_SET_P (olddecl)
2160 && (TREE_CODE (olddecl) == FUNCTION_DECL
2161 || (TREE_CODE (olddecl) == VAR_DECL
2162 && TREE_STATIC (olddecl))))
2163 make_decl_rtl (olddecl);
2165 /* The NEWDECL will no longer be needed. Because every out-of-class
2166 declaration of a member results in a call to duplicate_decls,
2167 freeing these nodes represents in a significant savings. */
2173 /* Return zero if the declaration NEWDECL is valid
2174 when the declaration OLDDECL (assumed to be for the same name)
2175 has already been seen.
2176 Otherwise return an error message format string with a %s
2177 where the identifier should go. */
2180 redeclaration_error_message (tree newdecl, tree olddecl)
2182 if (TREE_CODE (newdecl) == TYPE_DECL)
2184 /* Because C++ can put things into name space for free,
2185 constructs like "typedef struct foo { ... } foo"
2186 would look like an erroneous redeclaration. */
2187 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2190 return "redefinition of %q#D";
2192 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2194 /* If this is a pure function, its olddecl will actually be
2195 the original initialization to `0' (which we force to call
2196 abort()). Don't complain about redefinition in this case. */
2197 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2198 && DECL_INITIAL (olddecl) == NULL_TREE)
2201 /* If both functions come from different namespaces, this is not
2202 a redeclaration - this is a conflict with a used function. */
2203 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2204 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2205 && ! decls_match (olddecl, newdecl))
2206 return "%qD conflicts with used function";
2208 /* We'll complain about linkage mismatches in
2209 warn_extern_redeclared_static. */
2211 /* Defining the same name twice is no good. */
2212 if (DECL_INITIAL (olddecl) != NULL_TREE
2213 && DECL_INITIAL (newdecl) != NULL_TREE)
2215 if (DECL_NAME (olddecl) == NULL_TREE)
2216 return "%q#D not declared in class";
2217 else if (!GNU_INLINE_P (olddecl)
2218 || GNU_INLINE_P (newdecl))
2219 return "redefinition of %q#D";
2222 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2224 bool olda = GNU_INLINE_P (olddecl);
2225 bool newa = GNU_INLINE_P (newdecl);
2230 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2232 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2238 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2242 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2244 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2245 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2246 return "redefinition of %q#D";
2250 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2251 || (DECL_TEMPLATE_RESULT (newdecl)
2252 == DECL_TEMPLATE_RESULT (olddecl)))
2255 nt = DECL_TEMPLATE_RESULT (newdecl);
2256 if (DECL_TEMPLATE_INFO (nt))
2257 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2258 ot = DECL_TEMPLATE_RESULT (olddecl);
2259 if (DECL_TEMPLATE_INFO (ot))
2260 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2261 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2262 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2263 return "redefinition of %q#D";
2265 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2267 bool olda = GNU_INLINE_P (ot);
2268 bool newa = GNU_INLINE_P (nt);
2273 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2275 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2279 /* Core issue #226 (C++0x):
2281 If a friend function template declaration specifies a
2282 default template-argument, that declaration shall be a
2283 definition and shall be the only declaration of the
2284 function template in the translation unit. */
2285 if ((cxx_dialect != cxx98)
2286 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2287 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2288 /*is_primary=*/1, /*is_partial=*/0,
2289 /*is_friend_decl=*/2))
2290 return "redeclaration of friend %q#D may not have default template arguments";
2294 else if (TREE_CODE (newdecl) == VAR_DECL
2295 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2296 && (! DECL_LANG_SPECIFIC (olddecl)
2297 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2298 || DECL_THREAD_LOCAL_P (newdecl)))
2300 /* Only variables can be thread-local, and all declarations must
2301 agree on this property. */
2302 if (DECL_THREAD_LOCAL_P (newdecl))
2303 return "thread-local declaration of %q#D follows "
2304 "non-thread-local declaration";
2306 return "non-thread-local declaration of %q#D follows "
2307 "thread-local declaration";
2309 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2311 /* The objects have been declared at namespace scope. If either
2312 is a member of an anonymous union, then this is an invalid
2313 redeclaration. For example:
2319 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2320 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2321 return "redeclaration of %q#D";
2322 /* If at least one declaration is a reference, there is no
2323 conflict. For example:
2329 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2331 /* Reject two definitions. */
2332 return "redefinition of %q#D";
2336 /* Objects declared with block scope: */
2337 /* Reject two definitions, and reject a definition
2338 together with an external reference. */
2339 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2340 return "redeclaration of %q#D";
2345 /* Hash and equality functions for the named_label table. */
2348 named_label_entry_hash (const void *data)
2350 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2351 return DECL_UID (ent->label_decl);
2355 named_label_entry_eq (const void *a, const void *b)
2357 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2358 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2359 return ent_a->label_decl == ent_b->label_decl;
2362 /* Create a new label, named ID. */
2365 make_label_decl (tree id, int local_p)
2367 struct named_label_entry *ent;
2371 decl = build_decl (LABEL_DECL, id, void_type_node);
2373 DECL_CONTEXT (decl) = current_function_decl;
2374 DECL_MODE (decl) = VOIDmode;
2375 C_DECLARED_LABEL_FLAG (decl) = local_p;
2377 /* Say where one reference is to the label, for the sake of the
2378 error if it is not defined. */
2379 DECL_SOURCE_LOCATION (decl) = input_location;
2381 /* Record the fact that this identifier is bound to this label. */
2382 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2384 /* Create the label htab for the function on demand. */
2386 named_labels = htab_create_ggc (13, named_label_entry_hash,
2387 named_label_entry_eq, NULL);
2389 /* Record this label on the list of labels used in this function.
2390 We do this before calling make_label_decl so that we get the
2391 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2392 ent = GGC_CNEW (struct named_label_entry);
2393 ent->label_decl = decl;
2395 slot = htab_find_slot (named_labels, ent, INSERT);
2396 gcc_assert (*slot == NULL);
2402 /* Look for a label named ID in the current function. If one cannot
2403 be found, create one. (We keep track of used, but undefined,
2404 labels, and complain about them at the end of a function.) */
2407 lookup_label (tree id)
2411 timevar_push (TV_NAME_LOOKUP);
2412 /* You can't use labels at global scope. */
2413 if (current_function_decl == NULL_TREE)
2415 error ("label %qE referenced outside of any function", id);
2416 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2419 /* See if we've already got this label. */
2420 decl = IDENTIFIER_LABEL_VALUE (id);
2421 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2422 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2424 decl = make_label_decl (id, /*local_p=*/0);
2425 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2428 /* Declare a local label named ID. */
2431 declare_local_label (tree id)
2435 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2436 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2437 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2438 current_binding_level->shadowed_labels);
2439 current_binding_level->shadowed_labels = shadow;
2441 decl = make_label_decl (id, /*local_p=*/1);
2442 TREE_VALUE (shadow) = decl;
2447 /* Returns nonzero if it is ill-formed to jump past the declaration of
2448 DECL. Returns 2 if it's also a real problem. */
2451 decl_jump_unsafe (tree decl)
2453 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2454 || TREE_TYPE (decl) == error_mark_node)
2457 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2458 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2461 if (pod_type_p (TREE_TYPE (decl)))
2464 /* The POD stuff is just pedantry; why should it matter if the class
2465 contains a field of pointer to member type? */
2469 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2472 identify_goto (tree decl, const location_t *locus)
2475 permerror (input_location, "jump to label %qD", decl);
2477 permerror (input_location, "jump to case label");
2479 permerror (input_location, "%H from here", locus);
2482 /* Check that a single previously seen jump to a newly defined label
2483 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2484 the jump context; NAMES are the names in scope in LEVEL at the jump
2485 context; LOCUS is the source position of the jump or 0. Returns
2486 true if all is well. */
2489 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2490 bool exited_omp, const location_t *locus)
2492 struct cp_binding_level *b;
2493 bool identified = false, saw_eh = false, saw_omp = false;
2497 identify_goto (decl, locus);
2498 error (" exits OpenMP structured block");
2499 identified = saw_omp = true;
2502 for (b = current_binding_level; b ; b = b->level_chain)
2504 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2506 for (new_decls = b->names; new_decls != old_decls;
2507 new_decls = TREE_CHAIN (new_decls))
2509 int problem = decl_jump_unsafe (new_decls);
2515 identify_goto (decl, locus);
2519 error (" crosses initialization of %q+#D", new_decls);
2521 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2526 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2530 identify_goto (decl, locus);
2533 if (b->kind == sk_try)
2534 error (" enters try block");
2536 error (" enters catch block");
2539 if (b->kind == sk_omp && !saw_omp)
2543 identify_goto (decl, locus);
2546 error (" enters OpenMP structured block");
2555 check_previous_goto (tree decl, struct named_label_use_entry *use)
2557 check_previous_goto_1 (decl, use->binding_level,
2558 use->names_in_scope, use->in_omp_scope,
2559 &use->o_goto_locus);
2563 check_switch_goto (struct cp_binding_level* level)
2565 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2568 /* Check that a new jump to a label DECL is OK. Called by
2569 finish_goto_stmt. */
2572 check_goto (tree decl)
2574 struct named_label_entry *ent, dummy;
2575 bool saw_catch = false, identified = false;
2578 /* We can't know where a computed goto is jumping.
2579 So we assume that it's OK. */
2580 if (TREE_CODE (decl) != LABEL_DECL)
2583 /* We didn't record any information about this label when we created it,
2584 and there's not much point since it's trivial to analyze as a return. */
2585 if (decl == cdtor_label)
2588 dummy.label_decl = decl;
2589 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2590 gcc_assert (ent != NULL);
2592 /* If the label hasn't been defined yet, defer checking. */
2593 if (! DECL_INITIAL (decl))
2595 struct named_label_use_entry *new_use;
2597 /* Don't bother creating another use if the last goto had the
2598 same data, and will therefore create the same set of errors. */
2600 && ent->uses->names_in_scope == current_binding_level->names)
2603 new_use = GGC_NEW (struct named_label_use_entry);
2604 new_use->binding_level = current_binding_level;
2605 new_use->names_in_scope = current_binding_level->names;
2606 new_use->o_goto_locus = input_location;
2607 new_use->in_omp_scope = false;
2609 new_use->next = ent->uses;
2610 ent->uses = new_use;
2614 if (ent->in_try_scope || ent->in_catch_scope
2615 || ent->in_omp_scope || ent->bad_decls)
2617 permerror (input_location, "jump to label %q+D", decl);
2618 permerror (input_location, " from here");
2622 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2624 tree b = TREE_VALUE (bad);
2625 int u = decl_jump_unsafe (b);
2627 if (u > 1 && DECL_ARTIFICIAL (b))
2629 /* Can't skip init of __exception_info. */
2630 error ("%J enters catch block", b);
2634 error (" skips initialization of %q+#D", b);
2636 permerror (input_location, " enters scope of non-POD %q+#D", b);
2639 if (ent->in_try_scope)
2640 error (" enters try block");
2641 else if (ent->in_catch_scope && !saw_catch)
2642 error (" enters catch block");
2644 if (ent->in_omp_scope)
2645 error (" enters OpenMP structured block");
2646 else if (flag_openmp)
2648 struct cp_binding_level *b;
2649 for (b = current_binding_level; b ; b = b->level_chain)
2651 if (b == ent->binding_level)
2653 if (b->kind == sk_omp)
2657 permerror (input_location, "jump to label %q+D", decl);
2658 permerror (input_location, " from here");
2661 error (" exits OpenMP structured block");
2668 /* Check that a return is ok wrt OpenMP structured blocks.
2669 Called by finish_return_stmt. Returns true if all is well. */
2672 check_omp_return (void)
2674 struct cp_binding_level *b;
2675 for (b = current_binding_level; b ; b = b->level_chain)
2676 if (b->kind == sk_omp)
2678 error ("invalid exit from OpenMP structured block");
2684 /* Define a label, specifying the location in the source file.
2685 Return the LABEL_DECL node for the label. */
2688 define_label (location_t location, tree name)
2690 struct named_label_entry *ent, dummy;
2691 struct cp_binding_level *p;
2694 timevar_push (TV_NAME_LOOKUP);
2696 decl = lookup_label (name);
2698 dummy.label_decl = decl;
2699 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2700 gcc_assert (ent != NULL);
2702 /* After labels, make any new cleanups in the function go into their
2703 own new (temporary) binding contour. */
2704 for (p = current_binding_level;
2705 p->kind != sk_function_parms;
2707 p->more_cleanups_ok = 0;
2709 if (name == get_identifier ("wchar_t"))
2710 permerror (input_location, "label named wchar_t");
2712 if (DECL_INITIAL (decl) != NULL_TREE)
2714 error ("duplicate label %qD", decl);
2715 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2719 struct named_label_use_entry *use;
2721 /* Mark label as having been defined. */
2722 DECL_INITIAL (decl) = error_mark_node;
2723 /* Say where in the source. */
2724 DECL_SOURCE_LOCATION (decl) = location;
2726 ent->binding_level = current_binding_level;
2727 ent->names_in_scope = current_binding_level->names;
2729 for (use = ent->uses; use ; use = use->next)
2730 check_previous_goto (decl, use);
2734 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2739 struct cp_binding_level *level;
2740 struct cp_switch *next;
2741 /* The SWITCH_STMT being built. */
2743 /* A splay-tree mapping the low element of a case range to the high
2744 element, or NULL_TREE if there is no high element. Used to
2745 determine whether or not a new case label duplicates an old case
2746 label. We need a tree, rather than simply a hash table, because
2747 of the GNU case range extension. */
2751 /* A stack of the currently active switch statements. The innermost
2752 switch statement is on the top of the stack. There is no need to
2753 mark the stack for garbage collection because it is only active
2754 during the processing of the body of a function, and we never
2755 collect at that point. */
2757 static struct cp_switch *switch_stack;
2759 /* Called right after a switch-statement condition is parsed.
2760 SWITCH_STMT is the switch statement being parsed. */
2763 push_switch (tree switch_stmt)
2765 struct cp_switch *p = XNEW (struct cp_switch);
2766 p->level = current_binding_level;
2767 p->next = switch_stack;
2768 p->switch_stmt = switch_stmt;
2769 p->cases = splay_tree_new (case_compare, NULL, NULL);
2776 struct cp_switch *cs = switch_stack;
2777 location_t switch_location;
2779 /* Emit warnings as needed. */
2780 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2781 switch_location = EXPR_LOCATION (cs->switch_stmt);
2783 switch_location = input_location;
2784 if (!processing_template_decl)
2785 c_do_switch_warnings (cs->cases, switch_location,
2786 SWITCH_STMT_TYPE (cs->switch_stmt),
2787 SWITCH_STMT_COND (cs->switch_stmt));
2789 splay_tree_delete (cs->cases);
2790 switch_stack = switch_stack->next;
2794 /* Note that we've seen a definition of a case label, and complain if this
2795 is a bad place for one. */
2798 finish_case_label (tree low_value, tree high_value)
2801 struct cp_binding_level *p;
2803 if (processing_template_decl)
2807 /* For templates, just add the case label; we'll do semantic
2808 analysis at instantiation-time. */
2809 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2810 return add_stmt (build_case_label (low_value, high_value, label));
2813 /* Find the condition on which this switch statement depends. */
2814 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2815 if (cond && TREE_CODE (cond) == TREE_LIST)
2816 cond = TREE_VALUE (cond);
2818 if (!check_switch_goto (switch_stack->level))
2819 return error_mark_node;
2821 r = c_add_case_label (switch_stack->cases, cond,
2822 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2823 low_value, high_value);
2825 /* After labels, make any new cleanups in the function go into their
2826 own new (temporary) binding contour. */
2827 for (p = current_binding_level;
2828 p->kind != sk_function_parms;
2830 p->more_cleanups_ok = 0;
2835 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2838 typename_hash (const void* k)
2841 const_tree const t = (const_tree) k;
2843 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2844 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2849 typedef struct typename_info {
2857 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2858 really of type `typename_info*' */
2861 typename_compare (const void * k1, const void * k2)
2863 const_tree const t1 = (const_tree) k1;
2864 const typename_info *const t2 = (const typename_info *) k2;
2866 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2867 && TYPE_CONTEXT (t1) == t2->scope
2868 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2869 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2870 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2873 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2874 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2876 Returns the new TYPENAME_TYPE. */
2878 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2881 build_typename_type (tree context, tree name, tree fullname,
2882 enum tag_types tag_type)
2890 if (typename_htab == NULL)
2891 typename_htab = htab_create_ggc (61, &typename_hash,
2892 &typename_compare, NULL);
2894 ti.scope = FROB_CONTEXT (context);
2896 ti.template_id = fullname;
2897 ti.enum_p = tag_type == enum_type;
2898 ti.class_p = (tag_type == class_type
2899 || tag_type == record_type
2900 || tag_type == union_type);
2901 hash = (htab_hash_pointer (ti.scope)
2902 ^ htab_hash_pointer (ti.name));
2904 /* See if we already have this type. */
2905 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2910 /* Build the TYPENAME_TYPE. */
2911 t = cxx_make_type (TYPENAME_TYPE);
2912 TYPE_CONTEXT (t) = ti.scope;
2913 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2914 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2915 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2917 /* Build the corresponding TYPE_DECL. */
2918 d = build_decl (TYPE_DECL, name, t);
2919 TYPE_NAME (TREE_TYPE (d)) = d;
2920 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2921 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2922 DECL_ARTIFICIAL (d) = 1;
2924 /* Store it in the hash table. */
2927 /* TYPENAME_TYPEs must always be compared structurally, because
2928 they may or may not resolve down to another type depending on
2929 the currently open classes. */
2930 SET_TYPE_STRUCTURAL_EQUALITY (t);
2936 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2937 provided to name the type. Returns an appropriate type, unless an
2938 error occurs, in which case error_mark_node is returned. If we
2939 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2940 return that, rather than the _TYPE it corresponds to, in other
2941 cases we look through the type decl. If TF_ERROR is set, complain
2942 about errors, otherwise be quiet. */
2945 make_typename_type (tree context, tree name, enum tag_types tag_type,
2946 tsubst_flags_t complain)
2952 if (name == error_mark_node
2953 || context == NULL_TREE
2954 || context == error_mark_node)
2955 return error_mark_node;
2959 if (!(TYPE_LANG_SPECIFIC (name)
2960 && (CLASSTYPE_IS_TEMPLATE (name)
2961 || CLASSTYPE_USE_TEMPLATE (name))))
2962 name = TYPE_IDENTIFIER (name);
2964 /* Create a TEMPLATE_ID_EXPR for the type. */
2965 name = build_nt (TEMPLATE_ID_EXPR,
2966 CLASSTYPE_TI_TEMPLATE (name),
2967 CLASSTYPE_TI_ARGS (name));
2969 else if (TREE_CODE (name) == TYPE_DECL)
2970 name = DECL_NAME (name);
2974 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2976 name = TREE_OPERAND (name, 0);
2977 if (TREE_CODE (name) == TEMPLATE_DECL)
2978 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2979 else if (TREE_CODE (name) == OVERLOAD)
2981 error ("%qD is not a type", name);
2982 return error_mark_node;
2985 if (TREE_CODE (name) == TEMPLATE_DECL)
2987 error ("%qD used without template parameters", name);
2988 return error_mark_node;
2990 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2991 gcc_assert (TYPE_P (context));
2993 if (!MAYBE_CLASS_TYPE_P (context))
2995 if (complain & tf_error)
2996 error ("%q#T is not a class", context);
2997 return error_mark_node;
3000 /* When the CONTEXT is a dependent type, NAME could refer to a
3001 dependent base class of CONTEXT. But look inside it anyway
3002 if CONTEXT is a currently open scope, in case it refers to a
3003 member of the current instantiation or a non-dependent base;
3004 lookup will stop when we hit a dependent base. */
3005 if (!dependent_scope_p (context))
3006 /* We should only set WANT_TYPE when we're a nested typename type.
3007 Then we can give better diagnostics if we find a non-type. */
3008 t = lookup_field (context, name, 0, /*want_type=*/true);
3012 if (!t && dependent_type_p (context))
3013 return build_typename_type (context, name, fullname, tag_type);
3015 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3019 if (complain & tf_error)
3020 error (want_template ? "no class template named %q#T in %q#T"
3021 : "no type named %q#T in %q#T", name, context);
3022 return error_mark_node;
3025 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3027 if (complain & tf_error)
3028 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3030 return error_mark_node;
3032 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3034 if (complain & tf_error)
3035 error ("%<typename %T::%D%> names %q#T, which is not a type",
3037 return error_mark_node;
3040 if (complain & tf_error)
3041 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3044 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3046 /*entering_scope=*/0,
3047 tf_warning_or_error | tf_user);
3049 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3055 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3056 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3057 in which case error_mark_node is returned.
3059 If PARM_LIST is non-NULL, also make sure that the template parameter
3060 list of TEMPLATE_DECL matches.
3062 If COMPLAIN zero, don't complain about any errors that occur. */
3065 make_unbound_class_template (tree context, tree name, tree parm_list,
3066 tsubst_flags_t complain)
3072 name = TYPE_IDENTIFIER (name);
3073 else if (DECL_P (name))
3074 name = DECL_NAME (name);
3075 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3077 if (!dependent_type_p (context)
3078 || currently_open_class (context))
3080 tree tmpl = NULL_TREE;
3082 if (MAYBE_CLASS_TYPE_P (context))
3083 tmpl = lookup_field (context, name, 0, false);
3085 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3087 if (complain & tf_error)
3088 error ("no class template named %q#T in %q#T", name, context);
3089 return error_mark_node;
3093 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3095 if (complain & tf_error)
3097 error ("template parameters do not match template");
3098 error ("%q+D declared here", tmpl);
3100 return error_mark_node;
3103 if (complain & tf_error)
3104 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3109 /* Build the UNBOUND_CLASS_TEMPLATE. */
3110 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3111 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3112 TREE_TYPE (t) = NULL_TREE;
3113 SET_TYPE_STRUCTURAL_EQUALITY (t);
3115 /* Build the corresponding TEMPLATE_DECL. */
3116 d = build_decl (TEMPLATE_DECL, name, t);
3117 TYPE_NAME (TREE_TYPE (d)) = d;
3118 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3119 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3120 DECL_ARTIFICIAL (d) = 1;
3121 DECL_TEMPLATE_PARMS (d) = parm_list;
3128 /* Push the declarations of builtin types into the namespace.
3129 RID_INDEX is the index of the builtin type in the array
3130 RID_POINTERS. NAME is the name used when looking up the builtin
3131 type. TYPE is the _TYPE node for the builtin type. */
3134 record_builtin_type (enum rid rid_index,
3138 tree rname = NULL_TREE, tname = NULL_TREE;
3139 tree tdecl = NULL_TREE;
3141 if ((int) rid_index < (int) RID_MAX)
3142 rname = ridpointers[(int) rid_index];
3144 tname = get_identifier (name);
3146 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3147 eliminated. Built-in types should not be looked up name; their
3148 names are keywords that the parser can recognize. However, there
3149 is code in c-common.c that uses identifier_global_value to look
3150 up built-in types by name. */
3153 tdecl = build_decl (TYPE_DECL, tname, type);
3154 DECL_ARTIFICIAL (tdecl) = 1;
3155 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3161 tdecl = build_decl (TYPE_DECL, rname, type);
3162 DECL_ARTIFICIAL (tdecl) = 1;
3164 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3167 if (!TYPE_NAME (type))
3168 TYPE_NAME (type) = tdecl;
3171 debug_hooks->type_decl (tdecl, 0);
3174 /* Record one of the standard Java types.
3175 * Declare it as having the given NAME.
3176 * If SIZE > 0, it is the size of one of the integral types;
3177 * otherwise it is the negative of the size of one of the other types. */
3180 record_builtin_java_type (const char* name, int size)
3184 type = build_nonstandard_integer_type (size, 0);
3185 else if (size > -32)
3188 /* "__java_char" or ""__java_boolean". */
3189 type = build_nonstandard_integer_type (-size, 1);
3190 /* Get the signed type cached and attached to the unsigned type,
3191 so it doesn't get garbage-collected at "random" times,
3192 causing potential codegen differences out of different UIDs
3193 and different alias set numbers. */
3194 stype = build_nonstandard_integer_type (-size, 0);
3195 TREE_CHAIN (type) = stype;
3196 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3199 { /* "__java_float" or ""__java_double". */
3200 type = make_node (REAL_TYPE);
3201 TYPE_PRECISION (type) = - size;
3204 record_builtin_type (RID_MAX, name, type);
3205 decl = TYPE_NAME (type);
3207 /* Suppress generate debug symbol entries for these types,
3208 since for normal C++ they are just clutter.
3209 However, push_lang_context undoes this if extern "Java" is seen. */
3210 DECL_IGNORED_P (decl) = 1;
3212 TYPE_FOR_JAVA (type) = 1;
3216 /* Push a type into the namespace so that the back ends ignore it. */
3219 record_unknown_type (tree type, const char* name)
3221 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3222 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3223 DECL_IGNORED_P (decl) = 1;
3224 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3225 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3226 TYPE_ALIGN (type) = 1;
3227 TYPE_USER_ALIGN (type) = 0;
3228 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3231 /* A string for which we should create an IDENTIFIER_NODE at
3234 typedef struct predefined_identifier
3236 /* The name of the identifier. */
3237 const char *const name;
3238 /* The place where the IDENTIFIER_NODE should be stored. */
3240 /* Nonzero if this is the name of a constructor or destructor. */
3241 const int ctor_or_dtor_p;
3242 } predefined_identifier;
3244 /* Create all the predefined identifiers. */
3247 initialize_predefined_identifiers (void)
3249 const predefined_identifier *pid;
3251 /* A table of identifiers to create at startup. */
3252 static const predefined_identifier predefined_identifiers[] = {
3253 { "C++", &lang_name_cplusplus, 0 },
3254 { "C", &lang_name_c, 0 },
3255 { "Java", &lang_name_java, 0 },
3256 /* Some of these names have a trailing space so that it is
3257 impossible for them to conflict with names written by users. */
3258 { "__ct ", &ctor_identifier, 1 },
3259 { "__base_ctor ", &base_ctor_identifier, 1 },
3260 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3261 { "__dt ", &dtor_identifier, 1 },
3262 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3263 { "__base_dtor ", &base_dtor_identifier, 1 },
3264 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3265 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3266 { "nelts", &nelts_identifier, 0 },
3267 { THIS_NAME, &this_identifier, 0 },
3268 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3269 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3270 { "_vptr", &vptr_identifier, 0 },
3271 { "__vtt_parm", &vtt_parm_identifier, 0 },
3272 { "::", &global_scope_name, 0 },
3273 { "std", &std_identifier, 0 },
3277 for (pid = predefined_identifiers; pid->name; ++pid)
3279 *pid->node = get_identifier (pid->name);
3280 if (pid->ctor_or_dtor_p)
3281 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3285 /* Create the predefined scalar types of C,
3286 and some nodes representing standard constants (0, 1, (void *)0).
3287 Initialize the global binding level.
3288 Make definitions for built-in primitive functions. */
3291 cxx_init_decl_processing (void)
3294 tree void_ftype_ptr;
3296 build_common_tree_nodes (flag_signed_char, false);
3298 /* Create all the identifiers we need. */
3299 initialize_predefined_identifiers ();
3301 /* Create the global variables. */
3302 push_to_top_level ();
3304 current_function_decl = NULL_TREE;
3305 current_binding_level = NULL;
3306 /* Enter the global namespace. */
3307 gcc_assert (global_namespace == NULL_TREE);
3308 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3310 TREE_PUBLIC (global_namespace) = 1;
3311 begin_scope (sk_namespace, global_namespace);
3313 current_lang_name = NULL_TREE;
3315 if (flag_visibility_ms_compat)
3316 default_visibility = VISIBILITY_HIDDEN;
3319 current_lang_name = lang_name_c;
3321 /* Create the `std' namespace. */
3322 push_namespace (std_identifier);
3323 std_node = current_namespace;
3326 c_common_nodes_and_builtins ();
3328 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3329 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3330 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3331 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3332 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3333 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3334 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3335 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3337 integer_two_node = build_int_cst (NULL_TREE, 2);
3338 integer_three_node = build_int_cst (NULL_TREE, 3);
3340 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3341 truthvalue_type_node = boolean_type_node;
3342 truthvalue_false_node = boolean_false_node;
3343 truthvalue_true_node = boolean_true_node;
3345 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3348 record_builtin_type (RID_MAX, NULL, string_type_node);
3351 delta_type_node = ptrdiff_type_node;
3352 vtable_index_type = ptrdiff_type_node;
3354 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3355 void_ftype = build_function_type (void_type_node, void_list_node);
3356 void_ftype_ptr = build_function_type (void_type_node,
3357 tree_cons (NULL_TREE,
3361 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3363 /* C++ extensions */
3365 unknown_type_node = make_node (UNKNOWN_TYPE);
3366 record_unknown_type (unknown_type_node, "unknown type");
3368 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3369 TREE_TYPE (unknown_type_node) = unknown_type_node;
3371 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3373 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3374 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3376 init_list_type_node = make_node (UNKNOWN_TYPE);
3377 record_unknown_type (init_list_type_node, "init list");
3380 /* Make sure we get a unique function type, so we can give
3381 its pointer type a name. (This wins for gdb.) */
3382 tree vfunc_type = make_node (FUNCTION_TYPE);
3383 TREE_TYPE (vfunc_type) = integer_type_node;
3384 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3385 layout_type (vfunc_type);
3387 vtable_entry_type = build_pointer_type (vfunc_type);
3389 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3392 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3393 layout_type (vtbl_type_node);
3394 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3395 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3396 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3397 layout_type (vtbl_ptr_type_node);
3398 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3400 push_namespace (get_identifier ("__cxxabiv1"));
3401 abi_node = current_namespace;
3404 global_type_node = make_node (LANG_TYPE);
3405 record_unknown_type (global_type_node, "global type");
3408 current_lang_name = lang_name_cplusplus;
3412 tree bad_alloc_type_node;
3413 tree bad_alloc_decl;
3414 tree newtype, deltype;
3415 tree ptr_ftype_sizetype;
3417 push_namespace (std_identifier);
3418 bad_alloc_id = get_identifier ("bad_alloc");
3419 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3420 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3422 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3423 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3424 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3428 = build_function_type (ptr_type_node,
3429 tree_cons (NULL_TREE,
3432 newtype = build_exception_variant
3433 (ptr_ftype_sizetype, add_exception_specifier
3434 (NULL_TREE, bad_alloc_type_node, -1));
3435 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3436 push_cp_library_fn (NEW_EXPR, newtype);
3437 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3438 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3439 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3443 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3445 /* Perform other language dependent initializations. */
3446 init_class_processing ();
3447 init_rtti_processing ();
3449 if (flag_exceptions)
3450 init_exception_processing ();
3452 if (! supports_one_only ())
3455 make_fname_decl = cp_make_fname_decl;
3456 start_fname_decls ();
3458 /* Show we use EH for cleanups. */
3459 if (flag_exceptions)
3460 using_eh_for_cleanups ();
3463 /* Generate an initializer for a function naming variable from
3464 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3465 filled in with the type of the init. */
3468 cp_fname_init (const char* name, tree *type_p)
3470 tree domain = NULL_TREE;
3472 tree init = NULL_TREE;
3477 length = strlen (name);
3478 domain = build_index_type (size_int (length));
3479 init = build_string (length + 1, name);
3482 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3483 type = build_cplus_array_type (type, domain);
3488 TREE_TYPE (init) = type;
3490 init = error_mark_node;
3495 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3496 decl, NAME is the initialization string and TYPE_DEP indicates whether
3497 NAME depended on the type of the function. We make use of that to detect
3498 __PRETTY_FUNCTION__ inside a template fn. This is being done
3499 lazily at the point of first use, so we mustn't push the decl now. */
3502 cp_make_fname_decl (tree id, int type_dep)
3504 const char *const name = (type_dep && processing_template_decl
3505 ? NULL : fname_as_string (type_dep));
3507 tree init = cp_fname_init (name, &type);
3508 tree decl = build_decl (VAR_DECL, id, type);
3511 free (CONST_CAST (char *, name));
3513 /* As we're using pushdecl_with_scope, we must set the context. */
3514 DECL_CONTEXT (decl) = current_function_decl;
3515 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3517 TREE_STATIC (decl) = 1;
3518 TREE_READONLY (decl) = 1;
3519 DECL_ARTIFICIAL (decl) = 1;
3521 TREE_USED (decl) = 1;
3523 if (current_function_decl)
3525 struct cp_binding_level *b = current_binding_level;
3526 while (b->level_chain->kind != sk_function_parms)
3528 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3529 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3530 LOOKUP_ONLYCONVERTING);
3533 pushdecl_top_level_and_finish (decl, init);
3539 builtin_function_1 (tree decl, tree context, bool is_global)
3541 tree id = DECL_NAME (decl);
3542 const char *name = IDENTIFIER_POINTER (id);
3544 retrofit_lang_decl (decl);
3546 /* All nesting of C++ functions is lexical; there is never a "static
3547 chain" in the sense of GNU C nested functions. */
3548 DECL_NO_STATIC_CHAIN (decl) = 1;
3550 DECL_ARTIFICIAL (decl) = 1;
3551 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3552 SET_DECL_LANGUAGE (decl, lang_c);
3553 /* Runtime library routines are, by definition, available in an
3554 external shared object. */
3555 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3556 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3558 DECL_CONTEXT (decl) = context;
3561 pushdecl_top_level (decl);
3565 /* A function in the user's namespace should have an explicit
3566 declaration before it is used. Mark the built-in function as
3567 anticipated but not actually declared. */
3568 if (name[0] != '_' || name[1] != '_')
3569 DECL_ANTICIPATED (decl) = 1;
3570 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3572 size_t len = strlen (name);
3574 /* Treat __*_chk fortification functions as anticipated as well,
3575 unless they are __builtin_*. */
3576 if (len > strlen ("___chk")
3577 && memcmp (name + len - strlen ("_chk"),
3578 "_chk", strlen ("_chk") + 1) == 0)
3579 DECL_ANTICIPATED (decl) = 1;
3586 cxx_builtin_function (tree decl)
3588 tree id = DECL_NAME (decl);
3589 const char *name = IDENTIFIER_POINTER (id);
3590 /* All builtins that don't begin with an '_' should additionally
3591 go in the 'std' namespace. */
3594 tree decl2 = copy_node(decl);
3595 push_namespace (std_identifier);
3596 builtin_function_1 (decl2, std_node, false);
3600 return builtin_function_1 (decl, NULL_TREE, false);
3603 /* Like cxx_builtin_function, but guarantee the function is added to the global
3604 scope. This is to allow function specific options to add new machine
3605 dependent builtins when the target ISA changes via attribute((target(...)))
3606 which saves space on program startup if the program does not use non-generic
3610 cxx_builtin_function_ext_scope (tree decl)
3613 tree id = DECL_NAME (decl);
3614 const char *name = IDENTIFIER_POINTER (id);
3615 /* All builtins that don't begin with an '_' should additionally
3616 go in the 'std' namespace. */
3619 tree decl2 = copy_node(decl);
3620 push_namespace (std_identifier);
3621 builtin_function_1 (decl2, std_node, true);
3625 return builtin_function_1 (decl, NULL_TREE, true);
3628 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3629 function. Not called directly. */
3632 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3634 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3635 DECL_EXTERNAL (fn) = 1;
3636 TREE_PUBLIC (fn) = 1;
3637 DECL_ARTIFICIAL (fn) = 1;
3638 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3639 SET_DECL_LANGUAGE (fn, lang_c);
3640 /* Runtime library routines are, by definition, available in an
3641 external shared object. */
3642 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3643 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3647 /* Returns the _DECL for a library function with C linkage.
3648 We assume that such functions never throw; if this is incorrect,
3649 callers should unset TREE_NOTHROW. */
3652 build_library_fn (tree name, tree type)
3654 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3655 TREE_NOTHROW (fn) = 1;
3659 /* Returns the _DECL for a library function with C++ linkage. */
3662 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3664 tree fn = build_library_fn_1 (name, operator_code, type);
3665 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3666 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3667 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3671 /* Like build_library_fn, but takes a C string instead of an
3675 build_library_fn_ptr (const char* name, tree type)
3677 return build_library_fn (get_identifier (name), type);
3680 /* Like build_cp_library_fn, but takes a C string instead of an
3684 build_cp_library_fn_ptr (const char* name, tree type)
3686 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3689 /* Like build_library_fn, but also pushes the function so that we will
3690 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3691 may throw exceptions listed in RAISES. */
3694 push_library_fn (tree name, tree type, tree raises)
3699 type = build_exception_variant (type, raises);
3701 fn = build_library_fn (name, type);
3702 pushdecl_top_level (fn);
3706 /* Like build_cp_library_fn, but also pushes the function so that it
3707 will be found by normal lookup. */
3710 push_cp_library_fn (enum tree_code operator_code, tree type)
3712 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3719 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3723 push_void_library_fn (tree name, tree parmtypes)
3725 tree type = build_function_type (void_type_node, parmtypes);
3726 return push_library_fn (name, type, NULL_TREE);
3729 /* Like push_library_fn, but also note that this function throws
3730 and does not return. Used for __throw_foo and the like. */
3733 push_throw_library_fn (tree name, tree type)
3735 tree fn = push_library_fn (name, type, NULL_TREE);
3736 TREE_THIS_VOLATILE (fn) = 1;
3737 TREE_NOTHROW (fn) = 0;
3741 /* When we call finish_struct for an anonymous union, we create
3742 default copy constructors and such. But, an anonymous union
3743 shouldn't have such things; this function undoes the damage to the
3744 anonymous union type T.
3746 (The reason that we create the synthesized methods is that we don't
3747 distinguish `union { int i; }' from `typedef union { int i; } U'.
3748 The first is an anonymous union; the second is just an ordinary
3752 fixup_anonymous_aggr (tree t)
3756 /* Wipe out memory of synthesized methods. */
3757 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3758 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3759 TYPE_HAS_INIT_REF (t) = 0;
3760 TYPE_HAS_CONST_INIT_REF (t) = 0;
3761 TYPE_HAS_ASSIGN_REF (t) = 0;
3762 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3764 /* Splice the implicitly generated functions out of the TYPE_METHODS
3766 q = &TYPE_METHODS (t);
3769 if (DECL_ARTIFICIAL (*q))
3770 *q = TREE_CHAIN (*q);
3772 q = &TREE_CHAIN (*q);
3775 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3776 if (TYPE_METHODS (t))
3778 tree decl = TYPE_MAIN_DECL (t);
3780 if (TREE_CODE (t) != UNION_TYPE)
3781 error ("%Jan anonymous struct cannot have function members", decl);
3783 error ("%Jan anonymous union cannot have function members", decl);
3786 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3787 assignment operators (because they cannot have these methods themselves).
3788 For anonymous unions this is already checked because they are not allowed
3789 in any union, otherwise we have to check it. */
3790 if (TREE_CODE (t) != UNION_TYPE)
3794 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3795 if (TREE_CODE (field) == FIELD_DECL)
3797 type = TREE_TYPE (field);
3798 if (CLASS_TYPE_P (type))
3800 if (TYPE_NEEDS_CONSTRUCTING (type))
3801 error ("member %q+#D with constructor not allowed "
3802 "in anonymous aggregate", field);
3803 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3804 error ("member %q+#D with destructor not allowed "
3805 "in anonymous aggregate", field);
3806 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3807 error ("member %q+#D with copy assignment operator "
3808 "not allowed in anonymous aggregate", field);
3814 /* Make sure that a declaration with no declarator is well-formed, i.e.
3815 just declares a tagged type or anonymous union.
3817 Returns the type declared; or NULL_TREE if none. */
3820 check_tag_decl (cp_decl_specifier_seq *declspecs)
3822 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3823 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3824 /* If a class, struct, or enum type is declared by the DECLSPECS
3825 (i.e, if a class-specifier, enum-specifier, or non-typename
3826 elaborated-type-specifier appears in the DECLSPECS),
3827 DECLARED_TYPE is set to the corresponding type. */
3828 tree declared_type = NULL_TREE;
3829 bool error_p = false;
3831 if (declspecs->multiple_types_p)
3832 error ("multiple types in one declaration");
3833 else if (declspecs->redefined_builtin_type)
3835 if (!in_system_header)
3836 permerror (input_location, "redeclaration of C++ built-in type %qT",
3837 declspecs->redefined_builtin_type);
3842 && TYPE_P (declspecs->type)
3843 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3844 && MAYBE_CLASS_TYPE_P (declspecs->type))
3845 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3846 declared_type = declspecs->type;
3847 else if (declspecs->type == error_mark_node)
3849 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3850 permerror (input_location, "declaration does not declare anything");
3851 /* Check for an anonymous union. */
3852 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3853 && TYPE_ANONYMOUS_P (declared_type))
3855 /* 7/3 In a simple-declaration, the optional init-declarator-list
3856 can be omitted only when declaring a class (clause 9) or
3857 enumeration (7.2), that is, when the decl-specifier-seq contains
3858 either a class-specifier, an elaborated-type-specifier with
3859 a class-key (9.1), or an enum-specifier. In these cases and
3860 whenever a class-specifier or enum-specifier is present in the
3861 decl-specifier-seq, the identifiers in these specifiers are among
3862 the names being declared by the declaration (as class-name,
3863 enum-names, or enumerators, depending on the syntax). In such
3864 cases, and except for the declaration of an unnamed bit-field (9.6),
3865 the decl-specifier-seq shall introduce one or more names into the
3866 program, or shall redeclare a name introduced by a previous
3867 declaration. [Example:
3868 enum { }; // ill-formed
3869 typedef class { }; // ill-formed
3873 error ("missing type-name in typedef-declaration");
3876 /* Anonymous unions are objects, so they can have specifiers. */;
3877 SET_ANON_AGGR_TYPE_P (declared_type);
3879 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3880 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3885 if (declspecs->specs[(int)ds_inline]
3886 || declspecs->specs[(int)ds_virtual])
3887 error ("%qs can only be specified for functions",
3888 declspecs->specs[(int)ds_inline]
3889 ? "inline" : "virtual");
3891 && (!current_class_type
3892 || current_scope () != current_class_type))
3893 error ("%<friend%> can only be specified inside a class");
3894 else if (declspecs->specs[(int)ds_explicit])
3895 error ("%<explicit%> can only be specified for constructors");
3896 else if (declspecs->storage_class)
3897 error ("a storage class can only be specified for objects "
3899 else if (declspecs->specs[(int)ds_const]
3900 || declspecs->specs[(int)ds_volatile]
3901 || declspecs->specs[(int)ds_restrict]
3902 || declspecs->specs[(int)ds_thread])
3903 error ("qualifiers can only be specified for objects "
3905 else if (saw_typedef)
3906 warning (0, "%<typedef%> was ignored in this declaration");
3909 return declared_type;
3912 /* Called when a declaration is seen that contains no names to declare.
3913 If its type is a reference to a structure, union or enum inherited
3914 from a containing scope, shadow that tag name for the current scope
3915 with a forward reference.
3916 If its type defines a new named structure or union
3917 or defines an enum, it is valid but we need not do anything here.
3918 Otherwise, it is an error.
3920 C++: may have to grok the declspecs to learn about static,
3921 complain for anonymous unions.
3923 Returns the TYPE declared -- or NULL_TREE if none. */
3926 shadow_tag (cp_decl_specifier_seq *declspecs)
3928 tree t = check_tag_decl (declspecs);
3933 if (declspecs->attributes)
3935 warning (0, "attribute ignored in declaration of %q+#T", t);
3936 warning (0, "attribute for %q+#T must follow the %qs keyword",
3937 t, class_key_or_enum_as_string (t));
3941 if (maybe_process_partial_specialization (t) == error_mark_node)
3944 /* This is where the variables in an anonymous union are
3945 declared. An anonymous union declaration looks like:
3947 because there is no declarator after the union, the parser
3948 sends that declaration here. */
3949 if (ANON_AGGR_TYPE_P (t))
3951 fixup_anonymous_aggr (t);
3953 if (TYPE_FIELDS (t))
3955 tree decl = grokdeclarator (/*declarator=*/NULL,
3956 declspecs, NORMAL, 0, NULL);
3957 finish_anon_union (decl);
3964 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3967 groktypename (cp_decl_specifier_seq *type_specifiers,
3968 const cp_declarator *declarator,
3969 bool is_template_arg)
3973 enum decl_context context
3974 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3975 attrs = type_specifiers->attributes;
3976 type_specifiers->attributes = NULL_TREE;
3977 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3978 if (attrs && type != error_mark_node)
3980 if (CLASS_TYPE_P (type))
3981 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3982 "outside of definition", type);
3983 else if (MAYBE_CLASS_TYPE_P (type))
3984 /* A template type parameter or other dependent type. */
3985 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
3986 "type %qT without an associated declaration", type);
3988 cplus_decl_attributes (&type, attrs, 0);
3993 /* Process a DECLARATOR for a function-scope variable declaration,
3994 namespace-scope variable declaration, or function declaration.
3995 (Function definitions go through start_function; class member
3996 declarations appearing in the body of the class go through
3997 grokfield.) The DECL corresponding to the DECLARATOR is returned.
3998 If an error occurs, the error_mark_node is returned instead.
4000 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4001 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4002 for an explicitly defaulted function, or SD_DELETED for an explicitly
4003 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4004 implicitly initialized via a default constructor. ATTRIBUTES and
4005 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4006 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4007 set, the caller is responsible for calling pop_scope. */
4010 start_decl (const cp_declarator *declarator,
4011 cp_decl_specifier_seq *declspecs,
4014 tree prefix_attributes,
4015 tree *pushed_scope_p)
4023 *pushed_scope_p = NULL_TREE;
4025 /* An object declared as __attribute__((deprecated)) suppresses
4026 warnings of uses of other deprecated items. */
4027 if (lookup_attribute ("deprecated", attributes))
4028 deprecated_state = DEPRECATED_SUPPRESS;
4030 attributes = chainon (attributes, prefix_attributes);
4032 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4035 deprecated_state = DEPRECATED_NORMAL;
4037 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4038 || decl == error_mark_node)
4039 return error_mark_node;
4041 type = TREE_TYPE (decl);
4043 context = DECL_CONTEXT (decl);
4047 *pushed_scope_p = push_scope (context);
4049 /* We are only interested in class contexts, later. */
4050 if (TREE_CODE (context) == NAMESPACE_DECL)
4051 context = NULL_TREE;
4055 /* Is it valid for this decl to have an initializer at all?
4056 If not, set INITIALIZED to zero, which will indirectly
4057 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4058 switch (TREE_CODE (decl))
4061 error ("typedef %qD is initialized (use decltype instead)", decl);
4062 return error_mark_node;
4065 if (initialized == SD_DELETED)
4066 /* We'll handle the rest of the semantics later, but we need to
4067 set this now so it's visible to duplicate_decls. */
4068 DECL_DELETED_FN (decl) = 1;
4077 if (! toplevel_bindings_p ()
4078 && DECL_EXTERNAL (decl))
4079 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4081 DECL_EXTERNAL (decl) = 0;
4082 if (toplevel_bindings_p ())
4083 TREE_STATIC (decl) = 1;
4086 /* If this is a typedef that names the class for linkage purposes
4087 (7.1.3p8), apply any attributes directly to the type. */
4088 if (TREE_CODE (decl) == TYPE_DECL
4089 && TAGGED_TYPE_P (TREE_TYPE (decl))
4090 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4091 flags = ATTR_FLAG_TYPE_IN_PLACE;
4095 /* Set attributes here so if duplicate decl, will have proper attributes. */
4096 cplus_decl_attributes (&decl, attributes, flags);
4098 /* Dllimported symbols cannot be defined. Static data members (which
4099 can be initialized in-class and dllimported) go through grokfield,
4100 not here, so we don't need to exclude those decls when checking for
4102 if (initialized && DECL_DLLIMPORT_P (decl))
4104 error ("definition of %q#D is marked %<dllimport%>", decl);
4105 DECL_DLLIMPORT_P (decl) = 0;
4108 /* If #pragma weak was used, mark the decl weak now. */
4109 maybe_apply_pragma_weak (decl);
4111 if (TREE_CODE (decl) == FUNCTION_DECL
4112 && DECL_DECLARED_INLINE_P (decl)
4113 && DECL_UNINLINABLE (decl)
4114 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4115 warning (0, "inline function %q+D given attribute noinline", decl);
4117 if (context && COMPLETE_TYPE_P (complete_type (context)))
4119 if (TREE_CODE (decl) == VAR_DECL)
4121 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4122 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4123 error ("%q#D is not a static member of %q#T", decl, context);
4126 if (DECL_CONTEXT (field) != context)
4128 if (!same_type_p (DECL_CONTEXT (field), context))
4129 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4130 "to be defined as %<%T::%D%>",
4131 DECL_CONTEXT (field), DECL_NAME (decl),
4132 context, DECL_NAME (decl));
4133 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4135 if (processing_specialization
4136 && template_class_depth (context) == 0
4137 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4138 error ("template header not allowed in member definition "
4139 "of explicitly specialized class");
4140 /* Static data member are tricky; an in-class initialization
4141 still doesn't provide a definition, so the in-class
4142 declaration will have DECL_EXTERNAL set, but will have an
4143 initialization. Thus, duplicate_decls won't warn
4144 about this situation, and so we check here. */
4145 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4146 error ("duplicate initialization of %qD", decl);
4147 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4153 tree field = check_classfn (context, decl,
4154 (processing_template_decl
4155 > template_class_depth (context))
4156 ? current_template_parms
4158 if (field && field != error_mark_node
4159 && duplicate_decls (decl, field,
4160 /*newdecl_is_friend=*/false))
4164 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4165 DECL_IN_AGGR_P (decl) = 0;
4166 /* Do not mark DECL as an explicit specialization if it was not
4167 already marked as an instantiation; a declaration should
4168 never be marked as a specialization unless we know what
4169 template is being specialized. */
4170 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4172 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4174 /* [temp.expl.spec] An explicit specialization of a static data
4175 member of a template is a definition if the declaration
4176 includes an initializer; otherwise, it is a declaration.
4178 We check for processing_specialization so this only applies
4179 to the new specialization syntax. */
4180 if (!initialized && processing_specialization)
4181 DECL_EXTERNAL (decl) = 1;
4184 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4185 permerror (input_location, "declaration of %q#D outside of class is not definition",
4189 was_public = TREE_PUBLIC (decl);
4191 /* Enter this declaration into the symbol table. */
4192 decl = maybe_push_decl (decl);
4194 if (processing_template_decl)
4195 decl = push_template_decl (decl);
4196 if (decl == error_mark_node)
4197 return error_mark_node;
4199 /* Tell the back end to use or not use .common as appropriate. If we say
4200 -fconserve-space, we want this to save .data space, at the expense of
4201 wrong semantics. If we say -fno-conserve-space, we want this to
4202 produce errors about redefs; to do this we force variables into the
4204 if (flag_conserve_space
4205 && TREE_CODE (decl) == VAR_DECL
4206 && TREE_PUBLIC (decl)
4207 && !DECL_THREAD_LOCAL_P (decl)
4208 && !have_global_bss_p ())
4209 DECL_COMMON (decl) = 1;
4211 if (TREE_CODE (decl) == VAR_DECL
4212 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4213 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4215 /* This is a const variable with implicit 'static'. Set
4216 DECL_THIS_STATIC so we can tell it from variables that are
4217 !TREE_PUBLIC because of the anonymous namespace. */
4218 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4219 DECL_THIS_STATIC (decl) = 1;
4222 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4223 start_decl_1 (decl, initialized);
4228 /* Process the declaration of a variable DECL. INITIALIZED is true
4229 iff DECL is explicitly initialized. (INITIALIZED is false if the
4230 variable is initialized via an implicitly-called constructor.)
4231 This function must be called for ordinary variables (including, for
4232 example, implicit instantiations of templates), but must not be
4233 called for template declarations. */
4236 start_decl_1 (tree decl, bool initialized)
4240 bool aggregate_definition_p;
4242 gcc_assert (!processing_template_decl);
4244 if (error_operand_p (decl))
4247 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4249 type = TREE_TYPE (decl);
4250 complete_p = COMPLETE_TYPE_P (type);
4251 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4253 /* If an explicit initializer is present, or if this is a definition
4254 of an aggregate, then we need a complete type at this point.
4255 (Scalars are always complete types, so there is nothing to
4256 check.) This code just sets COMPLETE_P; errors (if necessary)
4257 are issued below. */
4258 if ((initialized || aggregate_definition_p)
4260 && COMPLETE_TYPE_P (complete_type (type)))
4263 /* We will not yet have set TREE_READONLY on DECL if the type
4264 was "const", but incomplete, before this point. But, now, we
4265 have a complete type, so we can try again. */
4266 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4270 /* Is it valid for this decl to have an initializer at all? */
4272 /* Don't allow initializations for incomplete types except for
4273 arrays which might be completed by the initialization. */
4275 ; /* A complete type is ok. */
4276 else if (type_uses_auto (type))
4277 ; /* An auto type is ok. */
4278 else if (TREE_CODE (type) != ARRAY_TYPE)
4280 error ("variable %q#D has initializer but incomplete type", decl);
4281 type = TREE_TYPE (decl) = error_mark_node;
4283 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4285 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4286 error ("elements of array %q#D have incomplete type", decl);
4287 /* else we already gave an error in start_decl. */
4290 else if (aggregate_definition_p && !complete_p)
4292 if (type_uses_auto (type))
4293 error ("declaration of %q#D has no initializer", decl);
4295 error ("aggregate %q#D has incomplete type and cannot be defined",
4297 /* Change the type so that assemble_variable will give
4298 DECL an rtl we can live with: (mem (const_int 0)). */
4299 type = TREE_TYPE (decl) = error_mark_node;
4302 /* Create a new scope to hold this declaration if necessary.
4303 Whether or not a new scope is necessary cannot be determined
4304 until after the type has been completed; if the type is a
4305 specialization of a class template it is not until after
4306 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4307 will be set correctly. */
4308 maybe_push_cleanup_level (type);
4311 /* Handle initialization of references. DECL, TYPE, and INIT have the
4312 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4313 but will be set to a new CLEANUP_STMT if a temporary is created
4314 that must be destroyed subsequently.
4316 Returns an initializer expression to use to initialize DECL, or
4317 NULL if the initialization can be performed statically.
4319 Quotes on semantics can be found in ARM 8.4.3. */
4322 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4326 if (init == NULL_TREE)
4328 if ((DECL_LANG_SPECIFIC (decl) == 0
4329 || DECL_IN_AGGR_P (decl) == 0)
4330 && ! DECL_THIS_EXTERN (decl))
4331 error ("%qD declared as reference but not initialized", decl);
4335 if (TREE_CODE (init) == CONSTRUCTOR)
4337 error ("ISO C++ forbids use of initializer list to "
4338 "initialize reference %qD", decl);
4342 if (TREE_CODE (init) == TREE_LIST)
4343 init = build_x_compound_expr_from_list (init, "initializer");
4345 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4346 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4347 /* Note: default conversion is only called in very special cases. */
4348 init = decay_conversion (init);
4350 /* Convert INIT to the reference type TYPE. This may involve the
4351 creation of a temporary, whose lifetime must be the same as that
4352 of the reference. If so, a DECL_EXPR for the temporary will be
4353 added just after the DECL_EXPR for DECL. That's why we don't set
4354 DECL_INITIAL for local references (instead assigning to them
4355 explicitly); we need to allow the temporary to be initialized
4357 tmp = initialize_reference (type, init, decl, cleanup);
4359 if (tmp == error_mark_node)
4361 else if (tmp == NULL_TREE)
4363 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4367 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4370 DECL_INITIAL (decl) = tmp;
4375 /* Subroutine of check_initializer. We're initializing a DECL of
4376 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4377 extend the lifetime of the underlying array to match that of the decl,
4378 just like for reference initialization. CLEANUP is as for
4379 grok_reference_init. */
4382 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4384 tree aggr_init, array, arrtype;
4385 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4386 aggr_init = TARGET_EXPR_INITIAL (init);
4387 init = build2 (INIT_EXPR, type, decl, init);
4389 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4390 arrtype = TREE_TYPE (array);
4392 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4393 array = TREE_OPERAND (array, 0);
4394 /* If the array is constant, finish_compound_literal already made it a
4395 static variable and we don't need to do anything here. */
4396 if (decl && TREE_CODE (array) == TARGET_EXPR)
4399 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4400 var = build_address (var);
4401 var = convert (arrtype, var);
4402 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4403 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4408 /* Designated initializers in arrays are not supported in GNU C++.
4409 The parser cannot detect this error since it does not know whether
4410 a given brace-enclosed initializer is for a class type or for an
4411 array. This function checks that CE does not use a designated
4412 initializer. If it does, an error is issued. Returns true if CE
4413 is valid, i.e., does not have a designated initializer. */
4416 check_array_designated_initializer (const constructor_elt *ce)
4418 /* Designated initializers for array elements are not supported. */
4421 /* The parser only allows identifiers as designated
4423 if (ce->index == error_mark_node)
4424 error ("name used in a GNU-style designated "
4425 "initializer for an array");
4428 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4429 error ("name %qD used in a GNU-style designated "
4430 "initializer for an array", ce->index);
4438 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4439 array until we finish parsing the initializer. If that's the
4440 situation we're in, update DECL accordingly. */
4443 maybe_deduce_size_from_array_init (tree decl, tree init)
4445 tree type = TREE_TYPE (decl);
4447 if (TREE_CODE (type) == ARRAY_TYPE
4448 && TYPE_DOMAIN (type) == NULL_TREE
4449 && TREE_CODE (decl) != TYPE_DECL)
4451 /* do_default is really a C-ism to deal with tentative definitions.
4452 But let's leave it here to ease the eventual merge. */
4453 int do_default = !DECL_EXTERNAL (decl);
4454 tree initializer = init ? init : DECL_INITIAL (decl);
4457 /* Check that there are no designated initializers in INIT, as
4458 those are not supported in GNU C++, and as the middle-end
4459 will crash if presented with a non-numeric designated
4461 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4463 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4464 constructor_elt *ce;
4467 VEC_iterate (constructor_elt, v, i, ce);
4469 if (!check_array_designated_initializer (ce))
4475 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4479 error ("initializer fails to determine size of %qD", decl);
4480 TREE_TYPE (decl) = error_mark_node;
4482 else if (failure == 2)
4486 error ("array size missing in %qD", decl);
4487 TREE_TYPE (decl) = error_mark_node;
4489 /* If a `static' var's size isn't known, make it extern as
4490 well as static, so it does not get allocated. If it's not
4491 `static', then don't mark it extern; finish_incomplete_decl
4492 will give it a default size and it will get allocated. */
4493 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4494 DECL_EXTERNAL (decl) = 1;
4496 else if (failure == 3)
4498 error ("zero-size array %qD", decl);
4499 TREE_TYPE (decl) = error_mark_node;
4503 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4505 layout_decl (decl, 0);
4509 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4510 any appropriate error messages regarding the layout. */
4513 layout_var_decl (tree decl)
4517 type = TREE_TYPE (decl);
4518 if (type == error_mark_node)
4521 /* If we haven't already layed out this declaration, do so now.
4522 Note that we must not call complete type for an external object
4523 because it's type might involve templates that we are not
4524 supposed to instantiate yet. (And it's perfectly valid to say
4525 `extern X x' for some incomplete type `X'.) */
4526 if (!DECL_EXTERNAL (decl))
4527 complete_type (type);
4528 if (!DECL_SIZE (decl)
4529 && TREE_TYPE (decl) != error_mark_node
4530 && (COMPLETE_TYPE_P (type)
4531 || (TREE_CODE (type) == ARRAY_TYPE
4532 && !TYPE_DOMAIN (type)
4533 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4534 layout_decl (decl, 0);
4536 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4538 /* An automatic variable with an incomplete type: that is an error.
4539 Don't talk about array types here, since we took care of that
4540 message in grokdeclarator. */
4541 error ("storage size of %qD isn't known", decl);
4542 TREE_TYPE (decl) = error_mark_node;
4545 /* Keep this code around in case we later want to control debug info
4546 based on whether a type is "used". (jason 1999-11-11) */
4548 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4549 /* Let debugger know it should output info for this type. */
4550 note_debug_info_needed (ttype);
4552 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4553 note_debug_info_needed (DECL_CONTEXT (decl));
4556 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4557 && DECL_SIZE (decl) != NULL_TREE
4558 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4560 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4561 constant_expression_warning (DECL_SIZE (decl));
4564 error ("storage size of %qD isn't constant", decl);
4565 TREE_TYPE (decl) = error_mark_node;
4570 /* If a local static variable is declared in an inline function, or if
4571 we have a weak definition, we must endeavor to create only one
4572 instance of the variable at link-time. */
4575 maybe_commonize_var (tree decl)
4577 /* Static data in a function with comdat linkage also has comdat
4579 if (TREE_STATIC (decl)
4580 /* Don't mess with __FUNCTION__. */
4581 && ! DECL_ARTIFICIAL (decl)
4582 && DECL_FUNCTION_SCOPE_P (decl)
4583 /* Unfortunately, import_export_decl has not always been called
4584 before the function is processed, so we cannot simply check
4586 && (DECL_COMDAT (DECL_CONTEXT (decl))
4587 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4588 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4589 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4593 /* With weak symbols, we simply make the variable COMDAT;
4594 that will cause copies in multiple translations units to
4596 comdat_linkage (decl);
4600 if (DECL_INITIAL (decl) == NULL_TREE
4601 || DECL_INITIAL (decl) == error_mark_node)
4603 /* Without weak symbols, we can use COMMON to merge
4604 uninitialized variables. */
4605 TREE_PUBLIC (decl) = 1;
4606 DECL_COMMON (decl) = 1;
4610 /* While for initialized variables, we must use internal
4611 linkage -- which means that multiple copies will not
4613 TREE_PUBLIC (decl) = 0;
4614 DECL_COMMON (decl) = 0;
4615 warning (0, "sorry: semantics of inline function static "
4616 "data %q+#D are wrong (you'll wind up "
4617 "with multiple copies)", decl);
4618 warning (0, "%J you can work around this by removing "
4624 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4625 /* Set it up again; we might have set DECL_INITIAL since the last
4627 comdat_linkage (decl);
4630 /* Issue an error message if DECL is an uninitialized const variable. */
4633 check_for_uninitialized_const_var (tree decl)
4635 tree type = TREE_TYPE (decl);
4637 /* ``Unless explicitly declared extern, a const object does not have
4638 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4640 if (TREE_CODE (decl) == VAR_DECL
4641 && TREE_CODE (type) != REFERENCE_TYPE
4642 && CP_TYPE_CONST_P (type)
4643 && !TYPE_NEEDS_CONSTRUCTING (type)
4644 && !DECL_INITIAL (decl))
4645 error ("uninitialized const %qD", decl);
4649 /* Structure holding the current initializer being processed by reshape_init.
4650 CUR is a pointer to the current element being processed, END is a pointer
4651 after the last element present in the initializer. */
4652 typedef struct reshape_iterator_t
4654 constructor_elt *cur;
4655 constructor_elt *end;
4658 static tree reshape_init_r (tree, reshape_iter *, bool);
4660 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4661 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4662 initialized. If there are no more such fields, the return value
4666 next_initializable_field (tree field)
4669 && (TREE_CODE (field) != FIELD_DECL
4670 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4671 || DECL_ARTIFICIAL (field)))
4672 field = TREE_CHAIN (field);
4677 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4678 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4679 INTEGER_CST representing the size of the array minus one (the maximum index),
4680 or NULL_TREE if the array was declared without specifying the size. D is
4681 the iterator within the constructor. */
4684 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4687 bool sized_array_p = (max_index != NULL_TREE);
4688 unsigned HOST_WIDE_INT max_index_cst = 0;
4689 unsigned HOST_WIDE_INT index;
4691 /* The initializer for an array is always a CONSTRUCTOR. */
4692 new_init = build_constructor (init_list_type_node, NULL);
4696 /* Minus 1 is used for zero sized arrays. */
4697 if (integer_all_onesp (max_index))
4700 if (host_integerp (max_index, 1))
4701 max_index_cst = tree_low_cst (max_index, 1);
4702 /* sizetype is sign extended, not zero extended. */
4704 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4708 /* Loop until there are no more initializers. */
4710 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4715 check_array_designated_initializer (d->cur);
4716 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4717 if (elt_init == error_mark_node)
4718 return error_mark_node;
4719 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4725 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4726 Parameters are the same of reshape_init_r. */
4729 reshape_init_array (tree type, reshape_iter *d)
4731 tree max_index = NULL_TREE;
4733 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4735 if (TYPE_DOMAIN (type))
4736 max_index = array_type_nelts (type);
4738 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4741 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4742 Parameters are the same of reshape_init_r. */
4745 reshape_init_vector (tree type, reshape_iter *d)
4747 tree max_index = NULL_TREE;
4750 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4752 if (COMPOUND_LITERAL_P (d->cur->value))
4754 tree value = d->cur->value;
4755 if (!same_type_p (TREE_TYPE (value), type))
4757 error ("invalid type %qT as initializer for a vector of type %qT",
4758 TREE_TYPE (d->cur->value), type);
4759 value = error_mark_node;
4765 /* For a vector, the representation type is a struct
4766 containing a single member which is an array of the
4767 appropriate size. */
4768 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4769 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4770 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4772 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4775 /* Subroutine of reshape_init_r, processes the initializers for classes
4776 or union. Parameters are the same of reshape_init_r. */
4779 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4784 gcc_assert (CLASS_TYPE_P (type));
4786 /* The initializer for a class is always a CONSTRUCTOR. */
4787 new_init = build_constructor (init_list_type_node, NULL);
4788 field = next_initializable_field (TYPE_FIELDS (type));
4794 An initializer for an aggregate member that is an
4795 empty class shall have the form of an empty
4796 initializer-list {}. */
4797 if (!first_initializer_p)
4799 error ("initializer for %qT must be brace-enclosed", type);
4800 return error_mark_node;
4805 /* Loop through the initializable fields, gathering initializers. */
4806 while (d->cur != d->end)
4810 /* Handle designated initializers, as an extension. */
4813 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4815 if (!field || TREE_CODE (field) != FIELD_DECL)
4817 error ("%qT has no non-static data member named %qD", type,
4819 return error_mark_node;
4823 /* If we processed all the member of the class, we are done. */
4827 field_init = reshape_init_r (TREE_TYPE (field), d,
4828 /*first_initializer_p=*/false);
4829 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4833 When a union is initialized with a brace-enclosed
4834 initializer, the braces shall only contain an
4835 initializer for the first member of the union. */
4836 if (TREE_CODE (type) == UNION_TYPE)
4839 field = next_initializable_field (TREE_CHAIN (field));
4845 /* Subroutine of reshape_init, which processes a single initializer (part of
4846 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4847 iterator within the CONSTRUCTOR which points to the initializer to process.
4848 FIRST_INITIALIZER_P is true if this is the first initializer of the
4849 CONSTRUCTOR node. */
4852 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4854 tree init = d->cur->value;
4856 if (error_operand_p (init))
4857 return error_mark_node;
4859 /* A non-aggregate type is always initialized with a single
4861 if (!CP_AGGREGATE_TYPE_P (type))
4863 /* It is invalid to initialize a non-aggregate type with a
4864 brace-enclosed initializer before C++0x.
4865 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4866 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4867 a CONSTRUCTOR (with a record type). */
4868 if (TREE_CODE (init) == CONSTRUCTOR
4869 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4871 if (SCALAR_TYPE_P (type))
4873 error ("braces around scalar initializer for type %qT", type);
4874 init = error_mark_node;
4877 maybe_warn_cpp0x ("extended initializer lists");
4886 All implicit type conversions (clause _conv_) are considered when
4887 initializing the aggregate member with an initializer from an
4888 initializer-list. If the initializer can initialize a member,
4889 the member is initialized. Otherwise, if the member is itself a
4890 non-empty subaggregate, brace elision is assumed and the
4891 initializer is considered for the initialization of the first
4892 member of the subaggregate. */
4893 if (TREE_CODE (init) != CONSTRUCTOR
4894 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4900 /* [dcl.init.string]
4902 A char array (whether plain char, signed char, or unsigned char)
4903 can be initialized by a string-literal (optionally enclosed in
4904 braces); a wchar_t array can be initialized by a wide
4905 string-literal (optionally enclosed in braces). */
4906 if (TREE_CODE (type) == ARRAY_TYPE
4907 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4909 tree str_init = init;
4911 /* Strip one level of braces if and only if they enclose a single
4912 element (as allowed by [dcl.init.string]). */
4913 if (!first_initializer_p
4914 && TREE_CODE (str_init) == CONSTRUCTOR
4915 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4917 str_init = VEC_index (constructor_elt,
4918 CONSTRUCTOR_ELTS (str_init), 0)->value;
4921 /* If it's a string literal, then it's the initializer for the array
4922 as a whole. Otherwise, continue with normal initialization for
4923 array types (one value per array element). */
4924 if (TREE_CODE (str_init) == STRING_CST)
4931 /* The following cases are about aggregates. If we are not within a full
4932 initializer already, and there is not a CONSTRUCTOR, it means that there
4933 is a missing set of braces (that is, we are processing the case for
4934 which reshape_init exists). */
4935 if (!first_initializer_p)
4937 if (TREE_CODE (init) == CONSTRUCTOR)
4939 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4940 /* There is no need to reshape pointer-to-member function
4941 initializers, as they are always constructed correctly
4942 by the front end. */
4944 else if (COMPOUND_LITERAL_P (init))
4945 /* For a nested compound literal, there is no need to reshape since
4946 brace elision is not allowed. Even if we decided to allow it,
4947 we should add a call to reshape_init in finish_compound_literal,
4948 before calling digest_init, so changing this code would still
4949 not be necessary. */
4950 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4954 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4955 return reshape_init (type, init);
4959 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4963 /* Dispatch to specialized routines. */
4964 if (CLASS_TYPE_P (type))
4965 return reshape_init_class (type, d, first_initializer_p);
4966 else if (TREE_CODE (type) == ARRAY_TYPE)
4967 return reshape_init_array (type, d);
4968 else if (TREE_CODE (type) == VECTOR_TYPE)
4969 return reshape_init_vector (type, d);
4974 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4975 brace-enclosed aggregate initializer.
4977 INIT is the CONSTRUCTOR containing the list of initializers describing
4978 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4979 It may not presently match the shape of the TYPE; for example:
4981 struct S { int a; int b; };
4982 struct S a[] = { 1, 2, 3, 4 };
4984 Here INIT will hold a VEC of four elements, rather than a
4985 VEC of two elements, each itself a VEC of two elements. This
4986 routine transforms INIT from the former form into the latter. The
4987 revised CONSTRUCTOR node is returned. */
4990 reshape_init (tree type, tree init)
4992 VEC(constructor_elt, gc) *v;
4996 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4998 v = CONSTRUCTOR_ELTS (init);
5000 /* An empty constructor does not need reshaping, and it is always a valid
5002 if (VEC_empty (constructor_elt, v))
5005 /* Recurse on this CONSTRUCTOR. */
5006 d.cur = VEC_index (constructor_elt, v, 0);
5007 d.end = d.cur + VEC_length (constructor_elt, v);
5009 new_init = reshape_init_r (type, &d, true);
5010 if (new_init == error_mark_node)
5011 return error_mark_node;
5013 /* Make sure all the element of the constructor were used. Otherwise,
5014 issue an error about exceeding initializers. */
5016 error ("too many initializers for %qT", type);
5021 /* Verify array initializer. Returns true if errors have been reported. */
5024 check_array_initializer (tree decl, tree type, tree init)
5026 tree element_type = TREE_TYPE (type);
5028 /* The array type itself need not be complete, because the
5029 initializer may tell us how many elements are in the array.
5030 But, the elements of the array must be complete. */
5031 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5034 error ("elements of array %q#D have incomplete type", decl);
5036 error ("elements of array %q#T have incomplete type", type);
5039 /* It is not valid to initialize a VLA. */
5041 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5042 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5045 error ("variable-sized object %qD may not be initialized", decl);
5047 error ("variable-sized compound literal");
5053 /* Subroutine of check_initializer; args are passed down from that function.
5054 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5057 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5060 int saved_stmts_are_full_exprs_p = 0;
5061 if (building_stmt_tree ())
5063 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5064 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5066 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5067 if (building_stmt_tree ())
5068 current_stmt_tree ()->stmts_are_full_exprs_p =
5069 saved_stmts_are_full_exprs_p;
5073 /* Verify INIT (the initializer for DECL), and record the
5074 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5075 grok_reference_init.
5077 If the return value is non-NULL, it is an expression that must be
5078 evaluated dynamically to initialize DECL. */
5081 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5083 tree type = TREE_TYPE (decl);
5084 tree init_code = NULL;
5086 /* Things that are going to be initialized need to have complete
5088 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5090 if (type == error_mark_node)
5091 /* We will have already complained. */
5094 if (TREE_CODE (type) == ARRAY_TYPE)
5096 if (check_array_initializer (decl, type, init))
5099 else if (!COMPLETE_TYPE_P (type))
5101 error ("%qD has incomplete type", decl);
5102 TREE_TYPE (decl) = error_mark_node;
5106 /* There is no way to make a variable-sized class type in GNU C++. */
5107 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5109 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5111 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5112 if (SCALAR_TYPE_P (type))
5116 maybe_warn_cpp0x ("extended initializer lists");
5117 init = build_zero_init (type, NULL_TREE, false);
5119 else if (init_len != 1)
5121 error ("scalar object %qD requires one element in initializer",
5123 TREE_TYPE (decl) = error_mark_node;
5129 if (TREE_CODE (decl) == CONST_DECL)
5131 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5133 DECL_INITIAL (decl) = init;
5135 gcc_assert (init != NULL_TREE);
5138 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5139 init = grok_reference_init (decl, type, init, cleanup);
5142 /* Do not reshape constructors of vectors (they don't need to be
5144 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5146 if (is_std_init_list (type))
5147 return build_init_list_var_init (decl, type, init, cleanup);
5148 else if (TYPE_NON_AGGREGATE_CLASS (type))
5150 /* Don't reshape if the class has constructors. */
5151 if (cxx_dialect == cxx98)
5152 error ("in C++98 %qD must be initialized by constructor, "
5155 init = build_tree_list (NULL_TREE, init);
5157 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5159 error ("opaque vector types cannot be initialized");
5160 init = error_mark_node;
5163 init = reshape_init (type, init);
5166 /* If DECL has an array type without a specific bound, deduce the
5167 array size from the initializer. */
5168 maybe_deduce_size_from_array_init (decl, init);
5169 type = TREE_TYPE (decl);
5170 if (type == error_mark_node)
5173 if (TYPE_NEEDS_CONSTRUCTING (type)
5174 || (CLASS_TYPE_P (type)
5175 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5176 return build_aggr_init_full_exprs (decl, init, flags);
5177 else if (TREE_CODE (init) != TREE_VEC)
5179 init_code = store_init_value (decl, init, flags);
5180 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5181 && DECL_INITIAL (decl)
5182 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5183 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5184 warning (0, "array %qD initialized by parenthesized string literal %qE",
5185 decl, DECL_INITIAL (decl));
5189 else if (DECL_EXTERNAL (decl))
5191 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5192 return build_aggr_init_full_exprs (decl, init, flags);
5193 else if (MAYBE_CLASS_TYPE_P (type))
5195 tree core_type = strip_array_types (type);
5197 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5198 error ("structure %qD with uninitialized const members", decl);
5199 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5200 error ("structure %qD with uninitialized reference members", decl);
5202 check_for_uninitialized_const_var (decl);
5205 check_for_uninitialized_const_var (decl);
5207 if (init && init != error_mark_node)
5208 init_code = build2 (INIT_EXPR, type, decl, init);
5213 /* If DECL is not a local variable, give it RTL. */
5216 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5218 int toplev = toplevel_bindings_p ();
5220 const char *filename;
5222 /* Set the DECL_ASSEMBLER_NAME for the object. */
5225 /* The `register' keyword, when used together with an
5226 asm-specification, indicates that the variable should be
5227 placed in a particular register. */
5228 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5230 set_user_assembler_name (decl, asmspec);
5231 DECL_HARD_REGISTER (decl) = 1;
5235 if (TREE_CODE (decl) == FUNCTION_DECL
5236 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5237 set_builtin_user_assembler_name (decl, asmspec);
5238 set_user_assembler_name (decl, asmspec);
5242 /* Handle non-variables up front. */
5243 if (TREE_CODE (decl) != VAR_DECL)
5245 rest_of_decl_compilation (decl, toplev, at_eof);
5249 /* If we see a class member here, it should be a static data
5251 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5253 gcc_assert (TREE_STATIC (decl));
5254 /* An in-class declaration of a static data member should be
5255 external; it is only a declaration, and not a definition. */
5256 if (init == NULL_TREE)
5257 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5260 /* We don't create any RTL for local variables. */
5261 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5264 /* We defer emission of local statics until the corresponding
5265 DECL_EXPR is expanded. */
5266 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5268 /* We try to defer namespace-scope static constants so that they are
5269 not emitted into the object file unnecessarily. */
5270 filename = input_filename;
5271 if (!DECL_VIRTUAL_P (decl)
5272 && TREE_READONLY (decl)
5273 && DECL_INITIAL (decl) != NULL_TREE
5274 && DECL_INITIAL (decl) != error_mark_node
5276 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5278 && !TREE_PUBLIC (decl))
5280 /* Fool with the linkage of static consts according to #pragma
5282 struct c_fileinfo *finfo = get_fileinfo (filename);
5283 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5285 TREE_PUBLIC (decl) = 1;
5286 DECL_EXTERNAL (decl) = finfo->interface_only;
5291 /* Likewise for template instantiations. */
5292 else if (DECL_LANG_SPECIFIC (decl)
5293 && DECL_IMPLICIT_INSTANTIATION (decl))
5296 /* If we're not deferring, go ahead and assemble the variable. */
5298 rest_of_decl_compilation (decl, toplev, at_eof);
5301 /* walk_tree helper for wrap_temporary_cleanups, below. */
5304 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5306 if (TYPE_P (*stmt_p))
5312 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5314 tree guard = (tree)data;
5315 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5317 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5318 /* Tell honor_protect_cleanup_actions to handle this as a separate
5320 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5322 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5328 /* We're initializing a local variable which has a cleanup GUARD. If there
5329 are any temporaries used in the initializer INIT of this variable, we
5330 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5331 variable will be cleaned up properly if one of them throws.
5333 Unfortunately, there's no way to express this properly in terms of
5334 nesting, as the regions for the temporaries overlap the region for the
5335 variable itself; if there are two temporaries, the variable needs to be
5336 the first thing destroyed if either of them throws. However, we only
5337 want to run the variable's cleanup if it actually got constructed. So
5338 we need to guard the temporary cleanups with the variable's cleanup if
5339 they are run on the normal path, but not if they are run on the
5340 exceptional path. We implement this by telling
5341 honor_protect_cleanup_actions to strip the variable cleanup from the
5342 exceptional path. */
5345 wrap_temporary_cleanups (tree init, tree guard)
5347 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5350 /* Generate code to initialize DECL (a local variable). */
5353 initialize_local_var (tree decl, tree init)
5355 tree type = TREE_TYPE (decl);
5359 gcc_assert (TREE_CODE (decl) == VAR_DECL
5360 || TREE_CODE (decl) == RESULT_DECL);
5361 gcc_assert (!TREE_STATIC (decl));
5363 if (DECL_SIZE (decl) == NULL_TREE)
5365 /* If we used it already as memory, it must stay in memory. */
5366 DECL_INITIAL (decl) = NULL_TREE;
5367 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5371 if (type == error_mark_node)
5374 /* Compute and store the initial value. */
5375 already_used = TREE_USED (decl) || TREE_USED (type);
5377 /* Generate a cleanup, if necessary. */
5378 cleanup = cxx_maybe_build_cleanup (decl);
5380 /* Perform the initialization. */
5383 int saved_stmts_are_full_exprs_p;
5385 /* If we're only initializing a single object, guard the destructors
5386 of any temporaries used in its initializer with its destructor.
5387 This isn't right for arrays because each element initialization is
5388 a full-expression. */
5389 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5390 wrap_temporary_cleanups (init, cleanup);
5392 gcc_assert (building_stmt_tree ());
5393 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5394 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5395 finish_expr_stmt (init);
5396 current_stmt_tree ()->stmts_are_full_exprs_p =
5397 saved_stmts_are_full_exprs_p;
5400 /* Set this to 0 so we can tell whether an aggregate which was
5401 initialized was ever used. Don't do this if it has a
5402 destructor, so we don't complain about the 'resource
5403 allocation is initialization' idiom. Now set
5404 attribute((unused)) on types so decls of that type will be
5405 marked used. (see TREE_USED, above.) */
5406 if (TYPE_NEEDS_CONSTRUCTING (type)
5408 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5409 && DECL_NAME (decl))
5410 TREE_USED (decl) = 0;
5411 else if (already_used)
5412 TREE_USED (decl) = 1;
5415 finish_decl_cleanup (decl, cleanup);
5418 /* DECL is a VAR_DECL for a compiler-generated variable with static
5419 storage duration (like a virtual table) whose initializer is a
5420 compile-time constant. INIT must be either a TREE_LIST of values,
5421 or a CONSTRUCTOR. Initialize the variable and provide it to the
5425 initialize_artificial_var (tree decl, tree init)
5427 gcc_assert (DECL_ARTIFICIAL (decl));
5428 if (TREE_CODE (init) == TREE_LIST)
5429 init = build_constructor_from_list (TREE_TYPE (decl), init);
5430 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5431 DECL_INITIAL (decl) = init;
5432 DECL_INITIALIZED_P (decl) = 1;
5433 determine_visibility (decl);
5434 layout_var_decl (decl);
5435 maybe_commonize_var (decl);
5436 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5439 /* INIT is the initializer for a variable, as represented by the
5440 parser. Returns true iff INIT is value-dependent. */
5443 value_dependent_init_p (tree init)
5445 if (TREE_CODE (init) == TREE_LIST)
5446 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5447 return any_value_dependent_elements_p (init);
5448 else if (TREE_CODE (init) == CONSTRUCTOR)
5449 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5451 VEC(constructor_elt, gc) *elts;
5455 elts = CONSTRUCTOR_ELTS (init);
5456 nelts = VEC_length (constructor_elt, elts);
5457 for (i = 0; i < nelts; ++i)
5458 if (value_dependent_init_p (VEC_index (constructor_elt,
5463 /* It must be a simple expression, e.g., int i = 3; */
5464 return value_dependent_expression_p (init);
5469 /* Finish processing of a declaration;
5470 install its line number and initial value.
5471 If the length of an array type is not known before,
5472 it must be determined now, from the initial value, or it is an error.
5474 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5475 true, then INIT is an integral constant expression.
5477 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5478 if the (init) syntax was used. */
5481 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5482 tree asmspec_tree, int flags)
5486 const char *asmspec = NULL;
5487 int was_readonly = 0;
5488 bool var_definition_p = false;
5489 int saved_processing_template_decl;
5492 if (decl == error_mark_node)
5497 error ("assignment (not initialization) in declaration");
5501 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5502 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5503 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5505 type = TREE_TYPE (decl);
5506 if (type == error_mark_node)
5509 /* Assume no cleanup is required. */
5510 cleanup = NULL_TREE;
5511 saved_processing_template_decl = processing_template_decl;
5513 /* If a name was specified, get the string. */
5514 if (global_scope_p (current_binding_level))
5515 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5516 if (asmspec_tree && asmspec_tree != error_mark_node)
5517 asmspec = TREE_STRING_POINTER (asmspec_tree);
5519 if (current_class_type
5520 && CP_DECL_CONTEXT (decl) == current_class_type
5521 && TYPE_BEING_DEFINED (current_class_type)
5522 && (DECL_INITIAL (decl) || init))
5523 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5525 auto_node = type_uses_auto (type);
5528 if (init == NULL_TREE)
5530 error ("declaration of %q#D has no initializer", decl);
5531 TREE_TYPE (decl) = error_mark_node;
5534 else if (describable_type (init))
5536 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5537 if (type == error_mark_node)
5542 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5544 if (init == ridpointers[(int)RID_DELETE])
5546 /* FIXME check this is 1st decl. */
5547 DECL_DELETED_FN (decl) = 1;
5548 DECL_DECLARED_INLINE_P (decl) = 1;
5549 DECL_INITIAL (decl) = error_mark_node;
5552 else if (init == ridpointers[(int)RID_DEFAULT])
5554 if (!defaultable_fn_p (decl))
5556 error ("%qD cannot be defaulted", decl);
5557 DECL_INITIAL (decl) = NULL_TREE;
5560 DECL_DEFAULTED_FN (decl) = 1;
5564 if (processing_template_decl)
5566 bool type_dependent_p;
5568 /* Add this declaration to the statement-tree. */
5569 if (at_function_scope_p ())
5570 add_decl_expr (decl);
5572 type_dependent_p = dependent_type_p (type);
5574 if (check_for_bare_parameter_packs (init))
5577 DECL_INITIAL (decl) = NULL_TREE;
5580 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5582 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5583 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5584 TREE_CONSTANT (decl) = 1;
5587 /* Generally, initializers in templates are expanded when the
5588 template is instantiated. But, if DECL is an integral
5589 constant static data member, then it can be used in future
5590 integral constant expressions, and its value must be
5593 && DECL_CLASS_SCOPE_P (decl)
5594 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5595 && !type_dependent_p
5596 && !value_dependent_init_p (init)))
5599 DECL_INITIAL (decl) = init;
5600 if (TREE_CODE (decl) == VAR_DECL
5601 && !DECL_PRETTY_FUNCTION_P (decl)
5602 && !type_dependent_p)
5603 maybe_deduce_size_from_array_init (decl, init);
5607 if (TREE_CODE (init) == TREE_LIST)
5609 /* If the parenthesized-initializer form was used (e.g.,
5610 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5611 arguments. (There is generally only one.) We convert them
5614 for (; list; list = TREE_CHAIN (list))
5616 tree elt = TREE_VALUE (list);
5617 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5621 init = fold_non_dependent_expr (init);
5622 processing_template_decl = 0;
5625 /* Take care of TYPE_DECLs up front. */
5626 if (TREE_CODE (decl) == TYPE_DECL)
5628 if (type != error_mark_node
5629 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5631 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5632 warning (0, "shadowing previous type declaration of %q#D", decl);
5633 set_identifier_type_value (DECL_NAME (decl), decl);
5636 /* If we have installed this as the canonical typedef for this
5637 type, and that type has not been defined yet, delay emitting
5638 the debug information for it, as we will emit it later. */
5639 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5640 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5641 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5643 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5648 /* A reference will be modified here, as it is initialized. */
5649 if (! DECL_EXTERNAL (decl)
5650 && TREE_READONLY (decl)
5651 && TREE_CODE (type) == REFERENCE_TYPE)
5654 TREE_READONLY (decl) = 0;
5657 if (TREE_CODE (decl) == VAR_DECL)
5659 /* Only PODs can have thread-local storage. Other types may require
5660 various kinds of non-trivial initialization. */
5661 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5662 error ("%qD cannot be thread-local because it has non-POD type %qT",
5663 decl, TREE_TYPE (decl));
5664 /* If this is a local variable that will need a mangled name,
5665 register it now. We must do this before processing the
5666 initializer for the variable, since the initialization might
5667 require a guard variable, and since the mangled name of the
5668 guard variable will depend on the mangled name of this
5670 if (DECL_FUNCTION_SCOPE_P (decl)
5671 && TREE_STATIC (decl)
5672 && !DECL_ARTIFICIAL (decl))
5673 push_local_name (decl);
5674 /* Convert the initializer to the type of DECL, if we have not
5675 already initialized DECL. */
5676 if (!DECL_INITIALIZED_P (decl)
5677 /* If !DECL_EXTERNAL then DECL is being defined. In the
5678 case of a static data member initialized inside the
5679 class-specifier, there can be an initializer even if DECL
5680 is *not* defined. */
5681 && (!DECL_EXTERNAL (decl) || init))
5683 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5686 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5687 /* Allow libjava/prims.cc define primitive classes. */
5688 if (init != NULL_TREE
5689 || jclass == NULL_TREE
5690 || TREE_CODE (jclass) != TYPE_DECL
5691 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5692 || !same_type_ignoring_top_level_qualifiers_p
5693 (type, TREE_TYPE (TREE_TYPE (jclass))))
5694 error ("Java object %qD not allocated with %<new%>", decl);
5699 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5700 if (init_const_expr_p)
5702 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5703 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5704 TREE_CONSTANT (decl) = 1;
5707 init = check_initializer (decl, init, flags, &cleanup);
5708 /* Thread-local storage cannot be dynamically initialized. */
5709 if (DECL_THREAD_LOCAL_P (decl) && init)
5711 error ("%qD is thread-local and so cannot be dynamically "
5712 "initialized", decl);
5716 /* Check that the initializer for a static data member was a
5717 constant. Although we check in the parser that the
5718 initializer is an integral constant expression, we do not
5719 simplify division-by-zero at the point at which it
5720 occurs. Therefore, in:
5722 struct S { static const int i = 7 / 0; };
5724 we issue an error at this point. It would
5725 probably be better to forbid division by zero in
5726 integral constant expressions. */
5727 if (DECL_EXTERNAL (decl) && init)
5729 error ("%qD cannot be initialized by a non-constant expression"
5730 " when being declared", decl);
5731 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5739 The memory occupied by any object of static storage
5740 duration is zero-initialized at program startup before
5741 any other initialization takes place.
5743 We cannot create an appropriate initializer until after
5744 the type of DECL is finalized. If DECL_INITIAL is set,
5745 then the DECL is statically initialized, and any
5746 necessary zero-initialization has already been performed. */
5747 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5748 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5749 /*nelts=*/NULL_TREE,
5750 /*static_storage_p=*/true);
5751 /* Remember that the initialization for this variable has
5753 DECL_INITIALIZED_P (decl) = 1;
5754 /* This declaration is the definition of this variable,
5755 unless we are initializing a static data member within
5756 the class specifier. */
5757 if (!DECL_EXTERNAL (decl))
5758 var_definition_p = true;
5760 /* If the variable has an array type, lay out the type, even if
5761 there is no initializer. It is valid to index through the
5762 array, and we must get TYPE_ALIGN set correctly on the array
5764 else if (TREE_CODE (type) == ARRAY_TYPE)
5767 else if (TREE_CODE (decl) == FIELD_DECL
5768 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5769 error ("non-static data member %qD has Java class type", decl);
5771 /* Add this declaration to the statement-tree. This needs to happen
5772 after the call to check_initializer so that the DECL_EXPR for a
5773 reference temp is added before the DECL_EXPR for the reference itself. */
5774 if (at_function_scope_p ())
5775 add_decl_expr (decl);
5777 /* Let the middle end know about variables and functions -- but not
5778 static data members in uninstantiated class templates. */
5779 if (!saved_processing_template_decl
5780 && (TREE_CODE (decl) == VAR_DECL
5781 || TREE_CODE (decl) == FUNCTION_DECL))
5783 if (TREE_CODE (decl) == VAR_DECL)
5785 layout_var_decl (decl);
5786 maybe_commonize_var (decl);
5789 /* This needs to happen after the linkage is set. */
5790 determine_visibility (decl);
5792 if (var_definition_p && TREE_STATIC (decl))
5794 /* If a TREE_READONLY variable needs initialization
5795 at runtime, it is no longer readonly and we need to
5796 avoid MEM_READONLY_P being set on RTL created for it. */
5799 if (TREE_READONLY (decl))
5800 TREE_READONLY (decl) = 0;
5803 else if (was_readonly)
5804 TREE_READONLY (decl) = 1;
5807 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5809 /* Check for abstractness of the type. Notice that there is no
5810 need to strip array types here since the check for those types
5811 is already done within create_array_type_for_decl. */
5812 if (TREE_CODE (type) == FUNCTION_TYPE
5813 || TREE_CODE (type) == METHOD_TYPE)
5814 abstract_virtuals_error (decl, TREE_TYPE (type));
5816 abstract_virtuals_error (decl, type);
5818 if (TREE_TYPE (decl) == error_mark_node)
5819 /* No initialization required. */
5821 else if (TREE_CODE (decl) == FUNCTION_DECL)
5825 if (init == ridpointers[(int)RID_DEFAULT])
5827 /* An out-of-class default definition is defined at
5828 the point where it is explicitly defaulted. */
5829 if (DECL_INITIAL (decl) == error_mark_node)
5830 synthesize_method (decl);
5833 error ("function %q#D is initialized like a variable", decl);
5835 /* else no initialization required. */
5837 else if (DECL_EXTERNAL (decl)
5838 && ! (DECL_LANG_SPECIFIC (decl)
5839 && DECL_NOT_REALLY_EXTERN (decl)))
5842 DECL_INITIAL (decl) = init;
5844 /* A variable definition. */
5845 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5846 /* Initialize the local variable. */
5847 initialize_local_var (decl, init);
5849 /* If a variable is defined, and then a subsequent
5850 definition with external linkage is encountered, we will
5851 get here twice for the same variable. We want to avoid
5852 calling expand_static_init more than once. For variables
5853 that are not static data members, we can call
5854 expand_static_init only when we actually process the
5855 initializer. It is not legal to redeclare a static data
5856 member, so this issue does not arise in that case. */
5857 else if (var_definition_p && TREE_STATIC (decl))
5858 expand_static_init (decl, init);
5861 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5862 reference, insert it in the statement-tree now. */
5864 push_cleanup (decl, cleanup, false);
5867 processing_template_decl = saved_processing_template_decl;
5870 TREE_READONLY (decl) = 1;
5872 /* If this was marked 'used', be sure it will be output. */
5873 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5874 mark_decl_referenced (decl);
5877 /* This is here for a midend callback from c-common.c. */
5880 finish_decl (tree decl, tree init, tree origtype ATTRIBUTE_UNUSED,
5883 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5886 /* Returns a declaration for a VAR_DECL as if:
5888 extern "C" TYPE NAME;
5890 had been seen. Used to create compiler-generated global
5894 declare_global_var (tree name, tree type)
5898 push_to_top_level ();
5899 decl = build_decl (VAR_DECL, name, type);
5900 TREE_PUBLIC (decl) = 1;
5901 DECL_EXTERNAL (decl) = 1;
5902 DECL_ARTIFICIAL (decl) = 1;
5903 /* If the user has explicitly declared this variable (perhaps
5904 because the code we are compiling is part of a low-level runtime
5905 library), then it is possible that our declaration will be merged
5906 with theirs by pushdecl. */
5907 decl = pushdecl (decl);
5908 finish_decl (decl, NULL_TREE, NULL_TREE, NULL_TREE);
5909 pop_from_top_level ();
5914 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5915 if "__cxa_atexit" is not being used) corresponding to the function
5916 to be called when the program exits. */
5919 get_atexit_fn_ptr_type (void)
5924 if (!atexit_fn_ptr_type_node)
5926 if (flag_use_cxa_atexit
5927 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5928 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5929 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5931 /* The parameter to "atexit" is "void (*)(void)". */
5932 arg_types = void_list_node;
5934 fn_type = build_function_type (void_type_node, arg_types);
5935 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5938 return atexit_fn_ptr_type_node;
5941 /* Returns a pointer to the `atexit' function. Note that if
5942 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5943 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5946 get_atexit_node (void)
5953 bool use_aeabi_atexit;
5958 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5960 /* The declaration for `__cxa_atexit' is:
5962 int __cxa_atexit (void (*)(void *), void *, void *)
5964 We build up the argument types and then then function type
5967 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5968 /* First, build the pointer-to-function type for the first
5970 fn_ptr_type = get_atexit_fn_ptr_type ();
5971 /* Then, build the rest of the argument types. */
5972 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5973 if (use_aeabi_atexit)
5975 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5976 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5980 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5981 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5983 /* And the final __cxa_atexit type. */
5984 fn_type = build_function_type (integer_type_node, arg_types);
5985 fn_ptr_type = build_pointer_type (fn_type);
5986 if (use_aeabi_atexit)
5987 name = "__aeabi_atexit";
5989 name = "__cxa_atexit";
5993 /* The declaration for `atexit' is:
5995 int atexit (void (*)());
5997 We build up the argument types and then then function type
5999 fn_ptr_type = get_atexit_fn_ptr_type ();
6000 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6001 /* Build the final atexit type. */
6002 fn_type = build_function_type (integer_type_node, arg_types);
6006 /* Now, build the function declaration. */
6007 push_lang_context (lang_name_c);
6008 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6009 mark_used (atexit_fndecl);
6010 pop_lang_context ();
6011 atexit_node = decay_conversion (atexit_fndecl);
6016 /* Returns the __dso_handle VAR_DECL. */
6019 get_dso_handle_node (void)
6021 if (dso_handle_node)
6022 return dso_handle_node;
6024 /* Declare the variable. */
6025 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6028 return dso_handle_node;
6031 /* Begin a new function with internal linkage whose job will be simply
6032 to destroy some particular variable. */
6034 static GTY(()) int start_cleanup_cnt;
6037 start_cleanup_fn (void)
6042 bool use_cxa_atexit = flag_use_cxa_atexit
6043 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6045 push_to_top_level ();
6047 /* No need to mangle this. */
6048 push_lang_context (lang_name_c);
6050 /* Build the name of the function. */
6051 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6052 /* Build the function declaration. */
6053 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6054 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6055 /* It's a function with internal linkage, generated by the
6057 TREE_PUBLIC (fndecl) = 0;
6058 DECL_ARTIFICIAL (fndecl) = 1;
6059 /* Make the function `inline' so that it is only emitted if it is
6060 actually needed. It is unlikely that it will be inlined, since
6061 it is only called via a function pointer, but we avoid unnecessary
6062 emissions this way. */
6063 DECL_DECLARED_INLINE_P (fndecl) = 1;
6064 DECL_INTERFACE_KNOWN (fndecl) = 1;
6065 /* Build the parameter. */
6070 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6071 DECL_CONTEXT (parmdecl) = fndecl;
6072 TREE_USED (parmdecl) = 1;
6073 DECL_ARGUMENTS (fndecl) = parmdecl;
6077 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6079 pop_lang_context ();
6081 return current_function_decl;
6084 /* Finish the cleanup function begun by start_cleanup_fn. */
6087 end_cleanup_fn (void)
6089 expand_or_defer_fn (finish_function (0));
6091 pop_from_top_level ();
6094 /* Generate code to handle the destruction of DECL, an object with
6095 static storage duration. */
6098 register_dtor_fn (tree decl)
6107 type = TREE_TYPE (decl);
6108 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6109 return void_zero_node;
6111 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6112 a class object, we can just pass the destructor to
6113 "__cxa_atexit"; we don't have to build a temporary function to do
6115 use_dtor = (flag_use_cxa_atexit
6116 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6117 && CLASS_TYPE_P (type));
6122 /* Find the destructor. */
6123 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6124 gcc_assert (idx >= 0);
6125 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6126 /* Make sure it is accessible. */
6127 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6131 /* Call build_cleanup before we enter the anonymous function so
6132 that any access checks will be done relative to the current
6133 scope, rather than the scope of the anonymous function. */
6134 build_cleanup (decl);
6136 /* Now start the function. */
6137 cleanup = start_cleanup_fn ();
6139 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6140 to the original function, rather than the anonymous one. That
6141 will make the back end think that nested functions are in use,
6142 which causes confusion. */
6143 push_deferring_access_checks (dk_no_check);
6144 fcall = build_cleanup (decl);
6145 pop_deferring_access_checks ();
6147 /* Create the body of the anonymous function. */
6148 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6149 finish_expr_stmt (fcall);
6150 finish_compound_stmt (compound_stmt);
6154 /* Call atexit with the cleanup function. */
6155 mark_used (cleanup);
6156 cleanup = build_address (cleanup);
6157 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6163 /* We must convert CLEANUP to the type that "__cxa_atexit"
6165 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6166 /* "__cxa_atexit" will pass the address of DECL to the
6167 cleanup function. */
6169 addr = build_address (decl);
6170 /* The declared type of the parameter to "__cxa_atexit" is
6171 "void *". For plain "T*", we could just let the
6172 machinery in cp_build_function_call convert it -- but if the
6173 type is "cv-qualified T *", then we need to convert it
6174 before passing it in, to avoid spurious errors. */
6175 addr = build_nop (ptr_type_node, addr);
6178 /* Since the cleanup functions we build ignore the address
6179 they're given, there's no reason to pass the actual address
6180 in, and, in general, it's cheaper to pass NULL than any
6182 addr = null_pointer_node;
6183 args = tree_cons (NULL_TREE,
6184 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6185 tf_warning_or_error),
6187 if (targetm.cxx.use_aeabi_atexit ())
6189 args = tree_cons (NULL_TREE, cleanup, args);
6190 args = tree_cons (NULL_TREE, addr, args);
6194 args = tree_cons (NULL_TREE, addr, args);
6195 args = tree_cons (NULL_TREE, cleanup, args);
6199 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6200 return cp_build_function_call (get_atexit_node (), args,
6201 tf_warning_or_error);
6204 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6205 is its initializer. Generate code to handle the construction
6206 and destruction of DECL. */
6209 expand_static_init (tree decl, tree init)
6211 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6212 gcc_assert (TREE_STATIC (decl));
6214 /* Some variables require no initialization. */
6216 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6217 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6220 if (DECL_FUNCTION_SCOPE_P (decl))
6222 /* Emit code to perform this initialization but once. */
6223 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6224 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6225 tree guard, guard_addr;
6226 tree acquire_fn, release_fn, abort_fn;
6229 /* Emit code to perform this initialization but once. This code
6232 static <type> guard;
6233 if (!guard.first_byte) {
6234 if (__cxa_guard_acquire (&guard)) {
6237 // Do initialization.
6238 flag = true; __cxa_guard_release (&guard);
6239 // Register variable for destruction at end of program.
6241 if (!flag) __cxa_guard_abort (&guard);
6245 Note that the `flag' variable is only set to 1 *after* the
6246 initialization is complete. This ensures that an exception,
6247 thrown during the construction, will cause the variable to
6248 reinitialized when we pass through this code again, as per:
6252 If the initialization exits by throwing an exception, the
6253 initialization is not complete, so it will be tried again
6254 the next time control enters the declaration.
6256 This process should be thread-safe, too; multiple threads
6257 should not be able to initialize the variable more than
6260 /* Create the guard variable. */
6261 guard = get_guard (decl);
6263 /* This optimization isn't safe on targets with relaxed memory
6264 consistency. On such targets we force synchronization in
6265 __cxa_guard_acquire. */
6266 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6268 /* Begin the conditional initialization. */
6269 if_stmt = begin_if_stmt ();
6270 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6271 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6274 if (flag_threadsafe_statics)
6276 guard_addr = build_address (guard);
6278 acquire_fn = get_identifier ("__cxa_guard_acquire");
6279 release_fn = get_identifier ("__cxa_guard_release");
6280 abort_fn = get_identifier ("__cxa_guard_abort");
6281 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6283 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6285 tree vfntype = build_function_type (void_type_node, argtypes);
6286 acquire_fn = push_library_fn
6287 (acquire_fn, build_function_type (integer_type_node, argtypes),
6289 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6290 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6294 release_fn = identifier_global_value (release_fn);
6295 abort_fn = identifier_global_value (abort_fn);
6298 inner_if_stmt = begin_if_stmt ();
6299 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6302 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6303 begin = get_target_expr (boolean_false_node);
6304 flag = TARGET_EXPR_SLOT (begin);
6306 TARGET_EXPR_CLEANUP (begin)
6307 = build3 (COND_EXPR, void_type_node, flag,
6309 build_call_n (abort_fn, 1, guard_addr));
6310 CLEANUP_EH_ONLY (begin) = 1;
6312 /* Do the initialization itself. */
6313 init = add_stmt_to_compound (begin, init);
6314 init = add_stmt_to_compound
6315 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6316 init = add_stmt_to_compound
6317 (init, build_call_n (release_fn, 1, guard_addr));
6320 init = add_stmt_to_compound (init, set_guard (guard));
6322 /* Use atexit to register a function for destroying this static
6324 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6326 finish_expr_stmt (init);
6328 if (flag_threadsafe_statics)
6330 finish_compound_stmt (inner_then_clause);
6331 finish_then_clause (inner_if_stmt);
6332 finish_if_stmt (inner_if_stmt);
6335 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6337 finish_compound_stmt (then_clause);
6338 finish_then_clause (if_stmt);
6339 finish_if_stmt (if_stmt);
6343 static_aggregates = tree_cons (init, decl, static_aggregates);
6347 /* Make TYPE a complete type based on INITIAL_VALUE.
6348 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6349 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6350 3 if the initializer list is empty (in pedantic mode). */
6353 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6356 tree type, elt_type;
6360 unsigned HOST_WIDE_INT i;
6363 /* An array of character type can be initialized from a
6364 brace-enclosed string constant.
6366 FIXME: this code is duplicated from reshape_init. Probably
6367 we should just call reshape_init here? */
6368 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6369 && TREE_CODE (initial_value) == CONSTRUCTOR
6370 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6372 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6373 tree value = VEC_index (constructor_elt, v, 0)->value;
6375 if (TREE_CODE (value) == STRING_CST
6376 && VEC_length (constructor_elt, v) == 1)
6377 initial_value = value;
6380 /* If any of the elements are parameter packs, we can't actually
6381 complete this type now because the array size is dependent. */
6382 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6384 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6387 if (PACK_EXPANSION_P (value))
6393 failure = complete_array_type (ptype, initial_value, do_default);
6395 /* We can create the array before the element type is complete, which
6396 means that we didn't have these two bits set in the original type
6397 either. In completing the type, we are expected to propagate these
6398 bits. See also complete_type which does the same thing for arrays
6401 if (TYPE_DOMAIN (type))
6403 elt_type = TREE_TYPE (type);
6404 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6405 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6406 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6412 /* Return zero if something is declared to be a member of type
6413 CTYPE when in the context of CUR_TYPE. STRING is the error
6414 message to print in that case. Otherwise, quietly return 1. */
6417 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6419 if (ctype && ctype != cur_type)
6421 if (flags == DTOR_FLAG)
6422 error ("destructor for alien class %qT cannot be a member", ctype);
6424 error ("constructor for alien class %qT cannot be a member", ctype);
6430 /* Subroutine of `grokdeclarator'. */
6432 /* Generate errors possibly applicable for a given set of specifiers.
6433 This is for ARM $7.1.2. */
6436 bad_specifiers (tree object,
6445 error ("%qD declared as a %<virtual%> %s", object, type);
6447 error ("%qD declared as an %<inline%> %s", object, type);
6449 error ("%<const%> and %<volatile%> function specifiers on "
6450 "%qD invalid in %s declaration",
6453 error ("%q+D declared as a friend", object);
6455 && (TREE_CODE (object) == TYPE_DECL
6456 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6457 && !TYPE_REFFN_P (TREE_TYPE (object))
6458 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6459 error ("%q+D declared with an exception specification", object);
6462 /* DECL is a member function or static data member and is presently
6463 being defined. Check that the definition is taking place in a
6467 check_class_member_definition_namespace (tree decl)
6469 /* These checks only apply to member functions and static data
6471 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6472 || TREE_CODE (decl) == VAR_DECL);
6473 /* We check for problems with specializations in pt.c in
6474 check_specialization_namespace, where we can issue better
6476 if (processing_specialization)
6478 /* There are no restrictions on the placement of
6479 explicit instantiations. */
6480 if (processing_explicit_instantiation)
6484 A member function definition that appears outside of the
6485 class definition shall appear in a namespace scope enclosing
6486 the class definition.
6490 The definition for a static data member shall appear in a
6491 namespace scope enclosing the member's class definition. */
6492 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6493 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6494 decl, DECL_CONTEXT (decl));
6497 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6498 METHOD_TYPE for a non-static member function; QUALS are the
6499 cv-qualifiers that apply to the function. */
6502 build_this_parm (tree type, cp_cv_quals quals)
6507 cp_cv_quals this_quals;
6509 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6510 /* The `this' parameter is implicitly `const'; it cannot be
6512 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6513 qual_type = cp_build_qualified_type (this_type, this_quals);
6514 parm = build_artificial_parm (this_identifier, qual_type);
6515 cp_apply_type_quals_to_decl (this_quals, parm);
6519 /* CTYPE is class type, or null if non-class.
6520 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6522 DECLARATOR is the function's name.
6523 PARMS is a chain of PARM_DECLs for the function.
6524 VIRTUALP is truthvalue of whether the function is virtual or not.
6525 FLAGS are to be passed through to `grokclassfn'.
6526 QUALS are qualifiers indicating whether the function is `const'
6528 RAISES is a list of exceptions that this function can raise.
6529 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6530 not look, and -1 if we should not call `grokclassfn' at all.
6532 SFK is the kind of special function (if any) for the new function.
6534 Returns `NULL_TREE' if something goes wrong, after issuing
6535 applicable error messages. */
6538 grokfndecl (tree ctype,
6542 tree orig_declarator,
6544 enum overload_flags flags,
6551 special_function_kind sfk,
6556 location_t location)
6559 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6563 type = build_exception_variant (type, raises);
6565 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6567 /* If we have an explicit location, use it, otherwise use whatever
6568 build_lang_decl used (probably input_location). */
6569 if (location != UNKNOWN_LOCATION)
6570 DECL_SOURCE_LOCATION (decl) = location;
6572 if (TREE_CODE (type) == METHOD_TYPE)
6575 parm = build_this_parm (type, quals);
6576 TREE_CHAIN (parm) = parms;
6579 DECL_ARGUMENTS (decl) = parms;
6580 for (t = parms; t; t = TREE_CHAIN (t))
6581 DECL_CONTEXT (t) = decl;
6582 /* Propagate volatile out from type to decl. */
6583 if (TYPE_VOLATILE (type))
6584 TREE_THIS_VOLATILE (decl) = 1;
6586 /* Setup decl according to sfk. */
6589 case sfk_constructor:
6590 case sfk_copy_constructor:
6591 DECL_CONSTRUCTOR_P (decl) = 1;
6593 case sfk_destructor:
6594 DECL_DESTRUCTOR_P (decl) = 1;
6600 /* If pointers to member functions use the least significant bit to
6601 indicate whether a function is virtual, ensure a pointer
6602 to this function will have that bit clear. */
6603 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6604 && TREE_CODE (type) == METHOD_TYPE
6605 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6606 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6609 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6613 ("defining explicit specialization %qD in friend declaration",
6617 tree fns = TREE_OPERAND (orig_declarator, 0);
6618 tree args = TREE_OPERAND (orig_declarator, 1);
6620 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6622 /* Something like `template <class T> friend void f<T>()'. */
6623 error ("invalid use of template-id %qD in declaration "
6624 "of primary template",
6630 /* A friend declaration of the form friend void f<>(). Record
6631 the information in the TEMPLATE_ID_EXPR. */
6632 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6634 if (TREE_CODE (fns) == COMPONENT_REF)
6636 /* Due to bison parser ickiness, we will have already looked
6637 up an operator_name or PFUNCNAME within the current class
6638 (see template_id in parse.y). If the current class contains
6639 such a name, we'll get a COMPONENT_REF here. Undo that. */
6641 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6642 == current_class_type);
6643 fns = TREE_OPERAND (fns, 1);
6645 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6646 || TREE_CODE (fns) == OVERLOAD);
6647 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6649 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6650 if (TREE_PURPOSE (t)
6651 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6653 error ("default arguments are not allowed in declaration "
6654 "of friend template specialization %qD",
6661 error ("%<inline%> is not allowed in declaration of friend "
6662 "template specialization %qD",
6669 /* If this decl has namespace scope, set that up. */
6671 set_decl_namespace (decl, in_namespace, friendp);
6673 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6675 /* `main' and builtins have implicit 'C' linkage. */
6676 if ((MAIN_NAME_P (declarator)
6677 || (IDENTIFIER_LENGTH (declarator) > 10
6678 && IDENTIFIER_POINTER (declarator)[0] == '_'
6679 && IDENTIFIER_POINTER (declarator)[1] == '_'
6680 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6681 && current_lang_name == lang_name_cplusplus
6682 && ctype == NULL_TREE
6683 /* NULL_TREE means global namespace. */
6684 && DECL_CONTEXT (decl) == NULL_TREE)
6685 SET_DECL_LANGUAGE (decl, lang_c);
6687 /* Should probably propagate const out from type to decl I bet (mrs). */
6690 DECL_STATIC_FUNCTION_P (decl) = 1;
6691 DECL_CONTEXT (decl) = ctype;
6696 DECL_CONTEXT (decl) = ctype;
6698 check_class_member_definition_namespace (decl);
6701 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6703 if (processing_template_decl)
6704 error ("cannot declare %<::main%> to be a template");
6706 error ("cannot declare %<::main%> to be inline");
6708 error ("cannot declare %<::main%> to be static");
6713 /* Members of anonymous types and local classes have no linkage; make
6714 them internal. If a typedef is made later, this will be changed. */
6715 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6716 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6721 /* [basic.link]: A name with no linkage (notably, the name of a class
6722 or enumeration declared in a local scope) shall not be used to
6723 declare an entity with linkage.
6725 Only check this for public decls for now. See core 319, 389. */
6726 t = no_linkage_check (TREE_TYPE (decl),
6727 /*relaxed_p=*/false);
6730 if (TYPE_ANONYMOUS_P (t))
6732 if (DECL_EXTERN_C_P (decl))
6733 /* Allow this; it's pretty common in C. */;
6736 permerror (input_location, "non-local function %q#D uses anonymous type",
6738 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6739 permerror (input_location, "%q+#D does not refer to the unqualified "
6740 "type, so it is not used for linkage",
6745 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6749 TREE_PUBLIC (decl) = publicp;
6752 DECL_INTERFACE_KNOWN (decl) = 1;
6753 DECL_NOT_REALLY_EXTERN (decl) = 1;
6756 /* If the declaration was declared inline, mark it as such. */
6758 DECL_DECLARED_INLINE_P (decl) = 1;
6760 DECL_EXTERNAL (decl) = 1;
6761 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6764 ? G_("static member function %qD cannot have cv-qualifier")
6765 : G_("non-member function %qD cannot have cv-qualifier"),
6767 quals = TYPE_UNQUALIFIED;
6770 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6771 && !grok_op_properties (decl, /*complain=*/true))
6774 if (ctype && decl_function_context (decl))
6775 DECL_NO_STATIC_CHAIN (decl) = 1;
6778 /* Make the init_value nonzero so pushdecl knows this is not
6779 tentative. error_mark_node is replaced later with the BLOCK. */
6780 DECL_INITIAL (decl) = error_mark_node;
6782 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6783 TREE_NOTHROW (decl) = 1;
6785 /* Caller will do the rest of this. */
6789 if (ctype != NULL_TREE)
6790 grokclassfn (ctype, decl, flags);
6792 decl = check_explicit_specialization (orig_declarator, decl,
6795 4 * (friendp != 0));
6796 if (decl == error_mark_node)
6801 cplus_decl_attributes (&decl, *attrlist, 0);
6802 *attrlist = NULL_TREE;
6805 /* Check main's type after attributes have been applied. */
6806 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6808 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6811 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6813 error ("%<::main%> must return %<int%>");
6814 newtype = build_function_type (integer_type_node, oldtypeargs);
6815 TREE_TYPE (decl) = newtype;
6818 check_main_parameter_types (decl);
6821 if (ctype != NULL_TREE
6822 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6825 tree old_decl = check_classfn (ctype, decl,
6826 (processing_template_decl
6827 > template_class_depth (ctype))
6828 ? current_template_parms
6831 if (old_decl == error_mark_node)
6839 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6840 /* Because grokfndecl is always supposed to return a
6841 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6842 here. We depend on our callers to figure out that its
6843 really a template that's being returned. */
6844 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6846 if (DECL_STATIC_FUNCTION_P (old_decl)
6847 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6848 /* Remove the `this' parm added by grokclassfn.
6849 XXX Isn't this done in start_function, too? */
6850 revert_static_member_fn (decl);
6851 if (DECL_ARTIFICIAL (old_decl))
6853 error ("definition of implicitly-declared %qD", old_decl);
6857 /* Since we've smashed OLD_DECL to its
6858 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6859 if (TREE_CODE (decl) == TEMPLATE_DECL)
6860 decl = DECL_TEMPLATE_RESULT (decl);
6862 /* Attempt to merge the declarations. This can fail, in
6863 the case of some invalid specialization declarations. */
6864 pushed_scope = push_scope (ctype);
6865 ok = duplicate_decls (decl, old_decl, friendp);
6867 pop_scope (pushed_scope);
6870 error ("no %q#D member function declared in class %qT",
6878 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6881 if (ctype == NULL_TREE || check)
6885 DECL_VIRTUAL_P (decl) = 1;
6890 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6891 the linkage that DECL will receive in the object file. */
6894 set_linkage_for_static_data_member (tree decl)
6896 /* A static data member always has static storage duration and
6897 external linkage. Note that static data members are forbidden in
6898 local classes -- the only situation in which a class has
6899 non-external linkage. */
6900 TREE_PUBLIC (decl) = 1;
6901 TREE_STATIC (decl) = 1;
6902 /* For non-template classes, static data members are always put
6903 out in exactly those files where they are defined, just as
6904 with ordinary namespace-scope variables. */
6905 if (!processing_template_decl)
6906 DECL_INTERFACE_KNOWN (decl) = 1;
6909 /* Create a VAR_DECL named NAME with the indicated TYPE.
6911 If SCOPE is non-NULL, it is the class type or namespace containing
6912 the variable. If SCOPE is NULL, the variable should is created in
6913 the innermost enclosings scope. */
6916 grokvardecl (tree type,
6918 const cp_decl_specifier_seq *declspecs,
6924 tree explicit_scope;
6926 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6928 /* Compute the scope in which to place the variable, but remember
6929 whether or not that scope was explicitly specified by the user. */
6930 explicit_scope = scope;
6933 /* An explicit "extern" specifier indicates a namespace-scope
6935 if (declspecs->storage_class == sc_extern)
6936 scope = current_namespace;
6937 else if (!at_function_scope_p ())
6938 scope = current_scope ();
6942 && (/* If the variable is a namespace-scope variable declared in a
6943 template, we need DECL_LANG_SPECIFIC. */
6944 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6945 /* Similarly for namespace-scope variables with language linkage
6947 || (TREE_CODE (scope) == NAMESPACE_DECL
6948 && current_lang_name != lang_name_cplusplus)
6949 /* Similarly for static data members. */
6951 decl = build_lang_decl (VAR_DECL, name, type);
6953 decl = build_decl (VAR_DECL, name, type);
6955 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6956 set_decl_namespace (decl, explicit_scope, 0);
6958 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6960 if (declspecs->storage_class == sc_extern)
6962 DECL_THIS_EXTERN (decl) = 1;
6963 DECL_EXTERNAL (decl) = !initialized;
6966 if (DECL_CLASS_SCOPE_P (decl))
6968 set_linkage_for_static_data_member (decl);
6969 /* This function is only called with out-of-class definitions. */
6970 DECL_EXTERNAL (decl) = 0;
6971 check_class_member_definition_namespace (decl);
6973 /* At top level, either `static' or no s.c. makes a definition
6974 (perhaps tentative), and absence of `static' makes it public. */
6975 else if (toplevel_bindings_p ())
6977 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6978 && (DECL_THIS_EXTERN (decl) || ! constp));
6979 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6981 /* Not at top level, only `static' makes a static definition. */
6984 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6985 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6988 if (declspecs->specs[(int)ds_thread])
6989 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6991 if (TREE_PUBLIC (decl))
6993 /* [basic.link]: A name with no linkage (notably, the name of a class
6994 or enumeration declared in a local scope) shall not be used to
6995 declare an entity with linkage.
6997 Only check this for public decls for now. */
6998 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7001 if (TYPE_ANONYMOUS_P (t))
7003 if (DECL_EXTERN_C_P (decl))
7004 /* Allow this; it's pretty common in C. */
7008 /* DRs 132, 319 and 389 seem to indicate types with
7009 no linkage can only be used to declare extern "C"
7010 entities. Since it's not always an error in the
7011 ISO C++ 90 Standard, we only issue a warning. */
7012 warning (0, "non-local variable %q#D uses anonymous type",
7014 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7015 warning (0, "%q+#D does not refer to the unqualified "
7016 "type, so it is not used for linkage",
7021 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7025 DECL_INTERFACE_KNOWN (decl) = 1;
7030 /* Create and return a canonical pointer to member function type, for
7031 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7034 build_ptrmemfunc_type (tree type)
7038 tree unqualified_variant = NULL_TREE;
7040 if (type == error_mark_node)
7043 /* If a canonical type already exists for this type, use it. We use
7044 this method instead of type_hash_canon, because it only does a
7045 simple equality check on the list of field members. */
7047 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7050 /* Make sure that we always have the unqualified pointer-to-member
7052 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7054 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7056 t = make_class_type (RECORD_TYPE);
7057 xref_basetypes (t, NULL_TREE);
7059 /* Let the front end know this is a pointer to member function... */
7060 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7061 /* ... and not really a class type. */
7062 SET_CLASS_TYPE_P (t, 0);
7064 field = build_decl (FIELD_DECL, pfn_identifier, type);
7067 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
7068 TREE_CHAIN (field) = fields;
7071 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7073 /* Zap out the name so that the back end will give us the debugging
7074 information for this anonymous RECORD_TYPE. */
7075 TYPE_NAME (t) = NULL_TREE;
7077 /* If this is not the unqualified form of this pointer-to-member
7078 type, set the TYPE_MAIN_VARIANT for this type to be the
7079 unqualified type. Since they are actually RECORD_TYPEs that are
7080 not variants of each other, we must do this manually. */
7081 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7083 t = build_qualified_type (t, cp_type_quals (type));
7084 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7085 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7086 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7087 TREE_TYPE (TYPE_BINFO (t)) = t;
7090 /* Cache this pointer-to-member type so that we can find it again
7092 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7094 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7095 SET_TYPE_STRUCTURAL_EQUALITY (t);
7096 else if (TYPE_CANONICAL (type) != type)
7097 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7102 /* Create and return a pointer to data member type. */
7105 build_ptrmem_type (tree class_type, tree member_type)
7107 if (TREE_CODE (member_type) == METHOD_TYPE)
7111 arg_types = TYPE_ARG_TYPES (member_type);
7112 class_type = (cp_build_qualified_type
7114 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7116 = build_method_type_directly (class_type,
7117 TREE_TYPE (member_type),
7118 TREE_CHAIN (arg_types));
7119 return build_ptrmemfunc_type (build_pointer_type (member_type));
7123 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7124 return build_offset_type (class_type, member_type);
7128 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7129 Check to see that the definition is valid. Issue appropriate error
7130 messages. Return 1 if the definition is particularly bad, or 0
7134 check_static_variable_definition (tree decl, tree type)
7136 /* Motion 10 at San Diego: If a static const integral data member is
7137 initialized with an integral constant expression, the initializer
7138 may appear either in the declaration (within the class), or in
7139 the definition, but not both. If it appears in the class, the
7140 member is a member constant. The file-scope definition is always
7142 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7144 error ("invalid in-class initialization of static data member "
7145 "of non-integral type %qT",
7147 /* If we just return the declaration, crashes will sometimes
7148 occur. We therefore return void_type_node, as if this were a
7149 friend declaration, to cause callers to completely ignore
7150 this declaration. */
7153 else if (!CP_TYPE_CONST_P (type))
7154 error ("ISO C++ forbids in-class initialization of non-const "
7155 "static member %qD",
7157 else if (!INTEGRAL_TYPE_P (type))
7158 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7159 "%qD of non-integral type %qT", decl, type);
7164 /* Given the SIZE (i.e., number of elements) in an array, compute an
7165 appropriate index type for the array. If non-NULL, NAME is the
7166 name of the thing being declared. */
7169 compute_array_index_type (tree name, tree size)
7173 tree abi_1_itype = NULL_TREE;
7175 if (error_operand_p (size))
7176 return error_mark_node;
7178 type = TREE_TYPE (size);
7179 /* The array bound must be an integer type. */
7180 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
7183 error ("size of array %qD has non-integral type %qT", name, type);
7185 error ("size of array has non-integral type %qT", type);
7186 size = integer_one_node;
7187 type = TREE_TYPE (size);
7190 /* We can only call value_dependent_expression_p on integral constant
7191 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7192 set if this isn't one. */
7193 if (processing_template_decl
7194 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7196 /* We cannot do any checking for a SIZE that isn't known to be
7197 constant. Just build the index type and mark that it requires
7198 structural equality checks. */
7199 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7200 size, integer_one_node));
7201 if (!TREE_SIDE_EFFECTS (size))
7203 TYPE_DEPENDENT_P (itype) = 1;
7204 TYPE_DEPENDENT_P_VALID (itype) = 1;
7206 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7210 if (!abi_version_at_least (2) && processing_template_decl)
7211 /* For abi-1, we handled all instances in templates the same way,
7212 even when they were non-dependent. This affects the manglings
7213 produced. So, we do the normal checking for non-dependent
7214 sizes, but at the end we'll return the same type that abi-1
7215 would have, but with TYPE_CANONICAL set to the "right"
7216 value that the current ABI would provide. */
7217 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7218 size, integer_one_node));
7220 /* The size might be the result of a cast. */
7221 STRIP_TYPE_NOPS (size);
7223 /* It might be a const variable or enumeration constant. */
7224 size = integral_constant_value (size);
7226 /* Normally, the array-bound will be a constant. */
7227 if (TREE_CODE (size) == INTEGER_CST)
7229 /* Check to see if the array bound overflowed. Make that an
7230 error, no matter how generous we're being. */
7231 constant_expression_error (size);
7233 /* An array must have a positive number of elements. */
7234 if (INT_CST_LT (size, integer_zero_node))
7237 error ("size of array %qD is negative", name);
7239 error ("size of array is negative");
7240 size = integer_one_node;
7242 /* As an extension we allow zero-sized arrays. We always allow
7243 them in system headers because glibc uses them. */
7244 else if (integer_zerop (size) && !in_system_header)
7247 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7249 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7252 else if (TREE_CONSTANT (size))
7254 /* `(int) &fn' is not a valid array bound. */
7256 error ("size of array %qD is not an integral constant-expression",
7259 error ("size of array is not an integral constant-expression");
7260 size = integer_one_node;
7262 else if (pedantic && warn_vla != 0)
7265 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7267 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7269 else if (warn_vla > 0)
7273 "variable length array %qD is used", name);
7276 "variable length array is used");
7279 if (processing_template_decl && !TREE_CONSTANT (size))
7280 /* A variable sized array. */
7281 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7284 HOST_WIDE_INT saved_processing_template_decl;
7286 /* Compute the index of the largest element in the array. It is
7287 one less than the number of elements in the array. We save
7288 and restore PROCESSING_TEMPLATE_DECL so that computations in
7289 cp_build_binary_op will be appropriately folded. */
7290 saved_processing_template_decl = processing_template_decl;
7291 processing_template_decl = 0;
7292 itype = cp_build_binary_op (input_location,
7294 cp_convert (ssizetype, size),
7295 cp_convert (ssizetype, integer_one_node),
7296 tf_warning_or_error);
7297 itype = fold (itype);
7298 processing_template_decl = saved_processing_template_decl;
7300 if (!TREE_CONSTANT (itype))
7301 /* A variable sized array. */
7302 itype = variable_size (itype);
7303 /* Make sure that there was no overflow when creating to a signed
7304 index type. (For example, on a 32-bit machine, an array with
7305 size 2^32 - 1 is too big.) */
7306 else if (TREE_CODE (itype) == INTEGER_CST
7307 && TREE_OVERFLOW (itype))
7309 error ("overflow in array dimension");
7310 TREE_OVERFLOW (itype) = 0;
7314 /* Create and return the appropriate index type. */
7317 tree t = build_index_type (itype);
7318 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7322 return build_index_type (itype);
7325 /* Returns the scope (if any) in which the entity declared by
7326 DECLARATOR will be located. If the entity was declared with an
7327 unqualified name, NULL_TREE is returned. */
7330 get_scope_of_declarator (const cp_declarator *declarator)
7332 while (declarator && declarator->kind != cdk_id)
7333 declarator = declarator->declarator;
7335 /* If the declarator-id is a SCOPE_REF, the scope in which the
7336 declaration occurs is the first operand. */
7338 && declarator->u.id.qualifying_scope)
7339 return declarator->u.id.qualifying_scope;
7341 /* Otherwise, the declarator is not a qualified name; the entity will
7342 be declared in the current scope. */
7346 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7347 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7351 create_array_type_for_decl (tree name, tree type, tree size)
7353 tree itype = NULL_TREE;
7354 const char* error_msg;
7356 /* If things have already gone awry, bail now. */
7357 if (type == error_mark_node || size == error_mark_node)
7358 return error_mark_node;
7360 /* Assume that everything will go OK. */
7363 /* There are some types which cannot be array elements. */
7364 switch (TREE_CODE (type))
7367 error_msg = "array of void";
7371 error_msg = "array of functions";
7374 case REFERENCE_TYPE:
7375 error_msg = "array of references";
7379 error_msg = "array of function members";
7386 /* If something went wrong, issue an error-message and return. */
7390 error ("declaration of %qD as %s", name, error_msg);
7392 error ("creating %s", error_msg);
7394 return error_mark_node;
7399 The constant expressions that specify the bounds of the arrays
7400 can be omitted only for the first member of the sequence. */
7401 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7404 error ("declaration of %qD as multidimensional array must "
7405 "have bounds for all dimensions except the first",
7408 error ("multidimensional array must have bounds for all "
7409 "dimensions except the first");
7411 return error_mark_node;
7414 /* Figure out the index type for the array. */
7416 itype = compute_array_index_type (name, size);
7419 T is called the array element type; this type shall not be [...] an
7420 abstract class type. */
7421 abstract_virtuals_error (name, type);
7423 return build_cplus_array_type (type, itype);
7426 /* Check that it's OK to declare a function with the indicated TYPE.
7427 SFK indicates the kind of special function (if any) that this
7428 function is. OPTYPE is the type given in a conversion operator
7429 declaration, or the class type for a constructor/destructor.
7430 Returns the actual return type of the function; that
7431 may be different than TYPE if an error occurs, or for certain
7432 special functions. */
7435 check_special_function_return_type (special_function_kind sfk,
7441 case sfk_constructor:
7443 error ("return type specification for constructor invalid");
7445 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7446 type = build_pointer_type (optype);
7448 type = void_type_node;
7451 case sfk_destructor:
7453 error ("return type specification for destructor invalid");
7454 /* We can't use the proper return type here because we run into
7455 problems with ambiguous bases and covariant returns.
7456 Java classes are left unchanged because (void *) isn't a valid
7457 Java type, and we don't want to change the Java ABI. */
7458 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7459 type = build_pointer_type (void_type_node);
7461 type = void_type_node;
7464 case sfk_conversion:
7466 error ("return type specified for %<operator %T%>", optype);
7477 /* A variable or data member (whose unqualified name is IDENTIFIER)
7478 has been declared with the indicated TYPE. If the TYPE is not
7479 acceptable, issue an error message and return a type to use for
7480 error-recovery purposes. */
7483 check_var_type (tree identifier, tree type)
7485 if (VOID_TYPE_P (type))
7488 error ("unnamed variable or field declared void");
7489 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7491 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7492 error ("variable or field %qE declared void", identifier);
7495 error ("variable or field declared void");
7496 type = error_mark_node;
7502 /* Given declspecs and a declarator (abstract or otherwise), determine
7503 the name and type of the object declared and construct a DECL node
7506 DECLSPECS points to the representation of declaration-specifier
7507 sequence that precedes declarator.
7509 DECL_CONTEXT says which syntactic context this declaration is in:
7510 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7511 FUNCDEF for a function definition. Like NORMAL but a few different
7512 error messages in each case. Return value may be zero meaning
7513 this definition is too screwy to try to parse.
7514 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7515 handle member functions (which have FIELD context).
7516 Return value may be zero meaning this definition is too screwy to
7518 PARM for a parameter declaration (either within a function prototype
7519 or before a function body). Make a PARM_DECL, or return void_type_node.
7520 CATCHPARM for a parameter declaration before a catch clause.
7521 TYPENAME if for a typename (in a cast or sizeof).
7522 Don't make a DECL node; just return the ..._TYPE node.
7523 FIELD for a struct or union field; make a FIELD_DECL.
7524 BITFIELD for a field with specified width.
7525 INITIALIZED is as for start_decl.
7527 ATTRLIST is a pointer to the list of attributes, which may be NULL
7528 if there are none; *ATTRLIST may be modified if attributes from inside
7529 the declarator should be applied to the declaration.
7531 When this function is called, scoping variables (such as
7532 CURRENT_CLASS_TYPE) should reflect the scope in which the
7533 declaration occurs, not the scope in which the new declaration will
7534 be placed. For example, on:
7538 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7541 Returns a DECL (if a declarator is present), a TYPE (if there is no
7542 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7546 grokdeclarator (const cp_declarator *declarator,
7547 const cp_decl_specifier_seq *declspecs,
7548 enum decl_context decl_context,
7552 tree type = NULL_TREE;
7554 int virtualp, explicitp, friendp, inlinep, staticp;
7555 int explicit_int = 0;
7556 int explicit_char = 0;
7557 int defaulted_int = 0;
7558 tree dependent_name = NULL_TREE;
7560 tree typedef_decl = NULL_TREE;
7561 const char *name = NULL;
7562 tree typedef_type = NULL_TREE;
7563 /* True if this declarator is a function definition. */
7564 bool funcdef_flag = false;
7565 cp_declarator_kind innermost_code = cdk_error;
7568 /* See the code below that used this. */
7569 tree decl_attr = NULL_TREE;
7572 /* Keep track of what sort of function is being processed
7573 so that we can warn about default return values, or explicit
7574 return values which do not match prescribed defaults. */
7575 special_function_kind sfk = sfk_none;
7577 tree dname = NULL_TREE;
7578 tree ctor_return_type = NULL_TREE;
7579 enum overload_flags flags = NO_SPECIAL;
7580 /* cv-qualifiers that apply to the declarator, for a declaration of
7581 a member function. */
7582 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7583 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7585 tree raises = NULL_TREE;
7586 int template_count = 0;
7587 tree returned_attrs = NULL_TREE;
7588 tree parms = NULL_TREE;
7589 const cp_declarator *id_declarator;
7590 /* The unqualified name of the declarator; either an
7591 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7592 tree unqualified_id;
7593 /* The class type, if any, in which this entity is located,
7594 or NULL_TREE if none. Note that this value may be different from
7595 the current class type; for example if an attempt is made to declare
7596 "A::f" inside "B", this value will be "A". */
7597 tree ctype = current_class_type;
7598 /* The NAMESPACE_DECL for the namespace in which this entity is
7599 located. If an unqualified name is used to declare the entity,
7600 this value will be NULL_TREE, even if the entity is located at
7602 tree in_namespace = NULL_TREE;
7603 cp_storage_class storage_class;
7604 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7605 bool type_was_error_mark_node = false;
7606 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7607 bool set_no_warning = false;
7608 bool template_type_arg = false;
7611 signed_p = declspecs->specs[(int)ds_signed];
7612 unsigned_p = declspecs->specs[(int)ds_unsigned];
7613 short_p = declspecs->specs[(int)ds_short];
7614 long_p = declspecs->specs[(int)ds_long];
7615 longlong = declspecs->specs[(int)ds_long] >= 2;
7616 thread_p = declspecs->specs[(int)ds_thread];
7618 if (decl_context == FUNCDEF)
7619 funcdef_flag = true, decl_context = NORMAL;
7620 else if (decl_context == MEMFUNCDEF)
7621 funcdef_flag = true, decl_context = FIELD;
7622 else if (decl_context == BITFIELD)
7623 bitfield = 1, decl_context = FIELD;
7624 else if (decl_context == TEMPLATE_TYPE_ARG)
7625 template_type_arg = true, decl_context = TYPENAME;
7627 if (initialized > 1)
7628 funcdef_flag = true;
7630 /* Look inside a declarator for the name being declared
7631 and get it as a string, for an error message. */
7632 for (id_declarator = declarator;
7634 id_declarator = id_declarator->declarator)
7636 if (id_declarator->kind != cdk_id)
7637 innermost_code = id_declarator->kind;
7639 switch (id_declarator->kind)
7642 if (id_declarator->declarator
7643 && id_declarator->declarator->kind == cdk_id)
7645 sfk = id_declarator->declarator->u.id.sfk;
7646 if (sfk == sfk_destructor)
7653 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7654 tree decl = id_declarator->u.id.unqualified_name;
7657 if (qualifying_scope)
7659 if (at_function_scope_p ())
7663 A declarator-id shall not be qualified except
7666 None of the cases are permitted in block
7668 if (qualifying_scope == global_namespace)
7669 error ("invalid use of qualified-name %<::%D%>",
7671 else if (TYPE_P (qualifying_scope))
7672 error ("invalid use of qualified-name %<%T::%D%>",
7673 qualifying_scope, decl);
7675 error ("invalid use of qualified-name %<%D::%D%>",
7676 qualifying_scope, decl);
7677 return error_mark_node;
7679 else if (TYPE_P (qualifying_scope))
7681 ctype = qualifying_scope;
7682 if (innermost_code != cdk_function
7683 && current_class_type
7684 && !UNIQUELY_DERIVED_FROM_P (ctype,
7685 current_class_type))
7687 error ("type %qT is not derived from type %qT",
7688 ctype, current_class_type);
7689 return error_mark_node;
7692 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7693 in_namespace = qualifying_scope;
7695 switch (TREE_CODE (decl))
7701 if (innermost_code != cdk_function)
7703 error ("declaration of %qD as non-function", decl);
7704 return error_mark_node;
7706 else if (!qualifying_scope
7707 && !(current_class_type && at_class_scope_p ()))
7709 error ("declaration of %qD as non-member", decl);
7710 return error_mark_node;
7713 type = TREE_OPERAND (decl, 0);
7715 type = constructor_name (type);
7716 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7721 case TEMPLATE_ID_EXPR:
7723 tree fns = TREE_OPERAND (decl, 0);
7726 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7728 gcc_assert (is_overloaded_fn (dname));
7729 dname = DECL_NAME (get_first_fn (dname));
7734 case IDENTIFIER_NODE:
7735 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7738 if (C_IS_RESERVED_WORD (dname))
7740 error ("declarator-id missing; using reserved word %qD",
7742 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7744 else if (!IDENTIFIER_TYPENAME_P (dname))
7745 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7748 gcc_assert (flags == NO_SPECIAL);
7749 flags = TYPENAME_FLAG;
7750 ctor_return_type = TREE_TYPE (dname);
7751 sfk = sfk_conversion;
7752 if (is_typename_at_global_scope (dname))
7753 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7755 name = "<invalid operator>";
7772 return error_mark_node;
7777 if (id_declarator->kind == cdk_id)
7783 The declarator in a function-definition shall have the form
7784 D1 ( parameter-declaration-clause) ... */
7785 if (funcdef_flag && innermost_code != cdk_function)
7787 error ("function definition does not declare parameters");
7788 return error_mark_node;
7791 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7792 && innermost_code != cdk_function
7793 && ! (ctype && !declspecs->any_specifiers_p))
7795 error ("declaration of %qD as non-function", dname);
7796 return error_mark_node;
7799 /* Anything declared one level down from the top level
7800 must be one of the parameters of a function
7801 (because the body is at least two levels down). */
7803 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7804 by not allowing C++ class definitions to specify their parameters
7805 with xdecls (must be spec.d in the parmlist).
7807 Since we now wait to push a class scope until we are sure that
7808 we are in a legitimate method context, we must set oldcname
7809 explicitly (since current_class_name is not yet alive).
7811 We also want to avoid calling this a PARM if it is in a namespace. */
7813 if (decl_context == NORMAL && !toplevel_bindings_p ())
7815 struct cp_binding_level *b = current_binding_level;
7816 current_binding_level = b->level_chain;
7817 if (current_binding_level != 0 && toplevel_bindings_p ())
7818 decl_context = PARM;
7819 current_binding_level = b;
7823 name = decl_context == PARM ? "parameter" : "type name";
7825 /* If there were multiple types specified in the decl-specifier-seq,
7826 issue an error message. */
7827 if (declspecs->multiple_types_p)
7829 error ("two or more data types in declaration of %qs", name);
7830 return error_mark_node;
7833 if (declspecs->conflicting_specifiers_p)
7835 error ("conflicting specifiers in declaration of %qs", name);
7836 return error_mark_node;
7839 /* Extract the basic type from the decl-specifier-seq. */
7840 type = declspecs->type;
7841 if (type == error_mark_node)
7844 type_was_error_mark_node = true;
7846 /* If the entire declaration is itself tagged as deprecated then
7847 suppress reports of deprecated items. */
7848 if (type && TREE_DEPRECATED (type)
7849 && deprecated_state != DEPRECATED_SUPPRESS)
7850 warn_deprecated_use (type, NULL_TREE);
7851 if (type && TREE_CODE (type) == TYPE_DECL)
7853 typedef_decl = type;
7854 type = TREE_TYPE (typedef_decl);
7855 if (TREE_DEPRECATED (type)
7856 && DECL_ARTIFICIAL (typedef_decl)
7857 && deprecated_state != DEPRECATED_SUPPRESS)
7858 warn_deprecated_use (type, NULL_TREE);
7860 /* No type at all: default to `int', and set DEFAULTED_INT
7861 because it was not a user-defined typedef. */
7862 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7864 /* These imply 'int'. */
7865 type = integer_type_node;
7869 explicit_int = declspecs->explicit_int_p;
7870 explicit_char = declspecs->explicit_char_p;
7873 /* See the code below that used this. */
7875 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7877 typedef_type = type;
7880 if (sfk != sfk_conversion)
7881 ctor_return_type = ctype;
7883 if (sfk != sfk_none)
7884 type = check_special_function_return_type (sfk, type,
7886 else if (type == NULL_TREE)
7892 /* We handle `main' specially here, because 'main () { }' is so
7893 common. With no options, it is allowed. With -Wreturn-type,
7894 it is a warning. It is only an error with -pedantic-errors. */
7895 is_main = (funcdef_flag
7896 && dname && MAIN_NAME_P (dname)
7897 && ctype == NULL_TREE
7898 && in_namespace == NULL_TREE
7899 && current_namespace == global_namespace);
7901 if (type_was_error_mark_node)
7902 /* We've already issued an error, don't complain more. */;
7903 else if (in_system_header || flag_ms_extensions)
7904 /* Allow it, sigh. */;
7906 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7908 pedwarn (input_location, OPT_pedantic,
7909 "ISO C++ forbids declaration of %qs with no type", name);
7911 warning (OPT_Wreturn_type,
7912 "ISO C++ forbids declaration of %qs with no type", name);
7914 type = integer_type_node;
7919 /* Now process the modifiers that were specified
7920 and check for invalid combinations. */
7922 /* Long double is a special combination. */
7923 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7926 type = build_qualified_type (long_double_type_node,
7927 cp_type_quals (type));
7930 /* Check all other uses of type modifiers. */
7932 if (unsigned_p || signed_p || long_p || short_p)
7936 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7937 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7938 else if (signed_p && unsigned_p)
7939 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7940 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7941 error ("%<long long%> invalid for %qs", name);
7942 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7943 error ("%<long%> invalid for %qs", name);
7944 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7945 error ("%<short%> invalid for %qs", name);
7946 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7947 error ("%<long%> or %<short%> invalid for %qs", name);
7948 else if ((long_p || short_p) && explicit_char)
7949 error ("%<long%> or %<short%> specified with char for %qs", name);
7950 else if (long_p && short_p)
7951 error ("%<long%> and %<short%> specified together for %qs", name);
7952 else if (type == char16_type_node || type == char32_type_node)
7954 if (signed_p || unsigned_p)
7955 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7956 else if (short_p || long_p)
7957 error ("%<short%> or %<long%> invalid for %qs", name);
7962 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7964 pedwarn (input_location, OPT_pedantic,
7965 "long, short, signed or unsigned used invalidly for %qs",
7967 if (flag_pedantic_errors)
7972 /* Discard the type modifiers if they are invalid. */
7983 /* Decide whether an integer type is signed or not.
7984 Optionally treat bitfields as signed by default. */
7988 It is implementation-defined whether a plain (neither
7989 explicitly signed or unsigned) char, short, int, or long
7990 bit-field is signed or unsigned.
7992 Naturally, we extend this to long long as well. Note that
7993 this does not include wchar_t. */
7994 || (bitfield && !flag_signed_bitfields
7996 /* A typedef for plain `int' without `signed' can be
7997 controlled just like plain `int', but a typedef for
7998 `signed int' cannot be so controlled. */
8000 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8001 && TREE_CODE (type) == INTEGER_TYPE
8002 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8005 type = long_long_unsigned_type_node;
8007 type = long_unsigned_type_node;
8009 type = short_unsigned_type_node;
8010 else if (type == char_type_node)
8011 type = unsigned_char_type_node;
8012 else if (typedef_decl)
8013 type = unsigned_type_for (type);
8015 type = unsigned_type_node;
8017 else if (signed_p && type == char_type_node)
8018 type = signed_char_type_node;
8020 type = long_long_integer_type_node;
8022 type = long_integer_type_node;
8024 type = short_integer_type_node;
8026 if (declspecs->specs[(int)ds_complex])
8028 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8029 error ("complex invalid for %qs", name);
8030 /* If we just have "complex", it is equivalent to
8031 "complex double", but if any modifiers at all are specified it is
8032 the complex form of TYPE. E.g, "complex short" is
8033 "complex short int". */
8035 else if (defaulted_int && ! longlong
8036 && ! (long_p || short_p || signed_p || unsigned_p))
8037 type = complex_double_type_node;
8038 else if (type == integer_type_node)
8039 type = complex_integer_type_node;
8040 else if (type == float_type_node)
8041 type = complex_float_type_node;
8042 else if (type == double_type_node)
8043 type = complex_double_type_node;
8044 else if (type == long_double_type_node)
8045 type = complex_long_double_type_node;
8047 type = build_complex_type (type);
8050 type_quals = TYPE_UNQUALIFIED;
8051 if (declspecs->specs[(int)ds_const])
8052 type_quals |= TYPE_QUAL_CONST;
8053 if (declspecs->specs[(int)ds_volatile])
8054 type_quals |= TYPE_QUAL_VOLATILE;
8055 if (declspecs->specs[(int)ds_restrict])
8056 type_quals |= TYPE_QUAL_RESTRICT;
8057 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8058 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8061 if (TREE_CODE (type) == FUNCTION_TYPE
8062 && type_quals != TYPE_UNQUALIFIED)
8064 /* This was an error in C++98 (cv-qualifiers cannot be added to
8065 a function type), but DR 295 makes the code well-formed by
8066 dropping the extra qualifiers. */
8069 tree bad_type = build_qualified_type (type, type_quals);
8070 pedwarn (input_location, OPT_pedantic,
8071 "ignoring %qV qualifiers added to function type %qT",
8074 type_quals = TYPE_UNQUALIFIED;
8076 type_quals |= cp_type_quals (type);
8077 type = cp_build_qualified_type_real
8078 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8079 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8080 /* We might have ignored or rejected some of the qualifiers. */
8081 type_quals = cp_type_quals (type);
8084 inlinep = !! declspecs->specs[(int)ds_inline];
8085 virtualp = !! declspecs->specs[(int)ds_virtual];
8086 explicitp = !! declspecs->specs[(int)ds_explicit];
8088 storage_class = declspecs->storage_class;
8089 if (storage_class == sc_static)
8090 staticp = 1 + (decl_context == FIELD);
8092 if (virtualp && staticp == 2)
8094 error ("member %qD cannot be declared both virtual and static", dname);
8095 storage_class = sc_none;
8098 friendp = !! declspecs->specs[(int)ds_friend];
8100 if (dependent_name && !friendp)
8102 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8103 return error_mark_node;
8106 /* Issue errors about use of storage classes for parameters. */
8107 if (decl_context == PARM)
8109 if (declspecs->specs[(int)ds_typedef])
8111 error ("typedef declaration invalid in parameter declaration");
8112 return error_mark_node;
8114 else if (storage_class == sc_static
8115 || storage_class == sc_extern
8117 error ("storage class specifiers invalid in parameter declarations");
8119 if (type_uses_auto (type))
8121 error ("parameter declared %<auto%>");
8122 type = error_mark_node;
8126 /* Give error if `virtual' is used outside of class declaration. */
8128 && (current_class_name == NULL_TREE || decl_context != FIELD))
8130 error ("%<virtual%> outside class declaration");
8134 /* Static anonymous unions are dealt with here. */
8135 if (staticp && decl_context == TYPENAME
8137 && ANON_AGGR_TYPE_P (declspecs->type))
8138 decl_context = FIELD;
8140 /* Warn about storage classes that are invalid for certain
8141 kinds of declarations (parameters, typenames, etc.). */
8144 && storage_class != sc_extern
8145 && storage_class != sc_static)
8146 || declspecs->specs[(int)ds_typedef]))
8148 error ("multiple storage classes in declaration of %qs", name);
8151 if (decl_context != NORMAL
8152 && ((storage_class != sc_none
8153 && storage_class != sc_mutable)
8156 if ((decl_context == PARM || decl_context == CATCHPARM)
8157 && (storage_class == sc_register
8158 || storage_class == sc_auto))
8160 else if (declspecs->specs[(int)ds_typedef])
8162 else if (decl_context == FIELD
8163 /* C++ allows static class elements. */
8164 && storage_class == sc_static)
8165 /* C++ also allows inlines and signed and unsigned elements,
8166 but in those cases we don't come in here. */
8170 if (decl_context == FIELD)
8171 error ("storage class specified for %qs", name);
8174 if (decl_context == PARM || decl_context == CATCHPARM)
8175 error ("storage class specified for parameter %qs", name);
8177 error ("storage class specified for typename");
8179 if (storage_class == sc_register
8180 || storage_class == sc_auto
8181 || storage_class == sc_extern
8183 storage_class = sc_none;
8186 else if (storage_class == sc_extern && funcdef_flag
8187 && ! toplevel_bindings_p ())
8188 error ("nested function %qs declared %<extern%>", name);
8189 else if (toplevel_bindings_p ())
8191 if (storage_class == sc_auto)
8192 error ("top-level declaration of %qs specifies %<auto%>", name);
8195 && storage_class != sc_extern
8196 && storage_class != sc_static)
8198 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8203 if (storage_class && friendp)
8205 error ("storage class specifiers invalid in friend function declarations");
8206 storage_class = sc_none;
8211 unqualified_id = NULL_TREE;
8214 unqualified_id = id_declarator->u.id.unqualified_name;
8215 switch (TREE_CODE (unqualified_id))
8218 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8219 if (TYPE_P (unqualified_id))
8220 unqualified_id = constructor_name (unqualified_id);
8223 case IDENTIFIER_NODE:
8224 case TEMPLATE_ID_EXPR:
8232 /* Determine the type of the entity declared by recurring on the
8234 for (; declarator; declarator = declarator->declarator)
8236 const cp_declarator *inner_declarator;
8239 if (type == error_mark_node)
8240 return error_mark_node;
8242 attrs = declarator->attributes;
8248 if (declarator == NULL || declarator->kind == cdk_id)
8249 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8250 if (declarator->kind == cdk_function)
8251 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8252 if (declarator->kind == cdk_array)
8253 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8254 returned_attrs = decl_attributes (&type,
8255 chainon (returned_attrs, attrs),
8259 if (declarator->kind == cdk_id)
8262 inner_declarator = declarator->declarator;
8264 switch (declarator->kind)
8267 type = create_array_type_for_decl (dname, type,
8268 declarator->u.array.bounds);
8276 /* Declaring a function type.
8277 Make sure we have a valid type for the function to return. */
8279 if (type_quals != TYPE_UNQUALIFIED)
8281 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8282 warning (OPT_Wignored_qualifiers,
8283 "type qualifiers ignored on function return type");
8284 /* We now know that the TYPE_QUALS don't apply to the
8285 decl, but to its return type. */
8286 type_quals = TYPE_UNQUALIFIED;
8287 set_no_warning = true;
8289 errmsg = targetm.invalid_return_type (type);
8293 type = integer_type_node;
8296 /* Error about some types functions can't return. */
8298 if (TREE_CODE (type) == FUNCTION_TYPE)
8300 error ("%qs declared as function returning a function", name);
8301 return error_mark_node;
8303 if (TREE_CODE (type) == ARRAY_TYPE)
8305 error ("%qs declared as function returning an array", name);
8306 return error_mark_node;
8309 /* Pick up type qualifiers which should be applied to `this'. */
8310 memfn_quals = declarator->u.function.qualifiers;
8312 /* Pick up the exception specifications. */
8313 raises = declarator->u.function.exception_specification;
8315 /* Say it's a definition only for the CALL_EXPR
8316 closest to the identifier. */
8317 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8319 /* Handle a late-specified return type. */
8322 if (type_uses_auto (type))
8324 if (!declarator->u.function.late_return_type)
8326 error ("%qs function uses %<auto%> type specifier without"
8327 " late return type", name);
8328 return error_mark_node;
8330 else if (!is_auto (type))
8332 error ("%qs function with late return type has"
8333 " %qT as its type rather than plain %<auto%>",
8335 return error_mark_node;
8338 else if (declarator->u.function.late_return_type)
8340 error ("%qs function with late return type not declared"
8341 " with %<auto%> type specifier", name);
8342 return error_mark_node;
8345 type = splice_late_return_type
8346 (type, declarator->u.function.late_return_type);
8347 if (type == error_mark_node)
8348 return error_mark_node;
8350 if (ctype == NULL_TREE
8351 && decl_context == FIELD
8353 && (friendp == 0 || dname == current_class_name))
8354 ctype = current_class_type;
8356 if (ctype && (sfk == sfk_constructor
8357 || sfk == sfk_destructor))
8359 /* We are within a class's scope. If our declarator name
8360 is the same as the class name, and we are defining
8361 a function, then it is a constructor/destructor, and
8362 therefore returns a void type. */
8364 /* ISO C++ 12.4/2. A destructor may not be declared
8365 const or volatile. A destructor may not be
8368 ISO C++ 12.1. A constructor may not be declared
8369 const or volatile. A constructor may not be
8370 virtual. A constructor may not be static. */
8372 error ((flags == DTOR_FLAG)
8373 ? "destructor cannot be static member function"
8374 : "constructor cannot be static member function");
8377 error ((flags == DTOR_FLAG)
8378 ? "destructors may not be cv-qualified"
8379 : "constructors may not be cv-qualified");
8380 memfn_quals = TYPE_UNQUALIFIED;
8383 if (decl_context == FIELD
8384 && !member_function_or_else (ctype,
8387 return error_mark_node;
8389 if (flags != DTOR_FLAG)
8391 /* It's a constructor. */
8396 permerror (input_location, "constructors cannot be declared virtual");
8399 if (decl_context == FIELD
8400 && sfk != sfk_constructor)
8401 return error_mark_node;
8403 if (decl_context == FIELD)
8409 error ("can't initialize friend function %qs", name);
8412 /* Cannot be both friend and virtual. */
8413 error ("virtual functions cannot be friends");
8416 if (decl_context == NORMAL)
8417 error ("friend declaration not in class definition");
8418 if (current_function_decl && funcdef_flag)
8419 error ("can't define friend function %qs in a local "
8423 else if (ctype && sfk == sfk_conversion)
8427 maybe_warn_cpp0x ("explicit conversion operators");
8432 arg_types = grokparms (declarator->u.function.parameters,
8435 if (inner_declarator
8436 && inner_declarator->kind == cdk_id
8437 && inner_declarator->u.id.sfk == sfk_destructor
8438 && arg_types != void_list_node)
8440 error ("destructors may not have parameters");
8441 arg_types = void_list_node;
8445 type = build_function_type (type, arg_types);
8452 /* Filter out pointers-to-references and references-to-references.
8453 We can get these if a TYPE_DECL is used. */
8455 if (TREE_CODE (type) == REFERENCE_TYPE)
8457 if (declarator->kind != cdk_reference)
8459 error ("cannot declare pointer to %q#T", type);
8460 type = TREE_TYPE (type);
8463 /* In C++0x, we allow reference to reference declarations
8464 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8465 and template type arguments [14.3.1/4 temp.arg.type]. The
8466 check for direct reference to reference declarations, which
8467 are still forbidden, occurs below. Reasoning behind the change
8468 can be found in DR106, DR540, and the rvalue reference
8470 else if (cxx_dialect == cxx98)
8472 error ("cannot declare reference to %q#T", type);
8473 type = TREE_TYPE (type);
8476 else if (VOID_TYPE_P (type))
8478 if (declarator->kind == cdk_reference)
8479 error ("cannot declare reference to %q#T", type);
8480 else if (declarator->kind == cdk_ptrmem)
8481 error ("cannot declare pointer to %q#T member", type);
8484 /* We now know that the TYPE_QUALS don't apply to the decl,
8485 but to the target of the pointer. */
8486 type_quals = TYPE_UNQUALIFIED;
8488 if (declarator->kind == cdk_ptrmem
8489 && (TREE_CODE (type) == FUNCTION_TYPE
8490 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8492 memfn_quals |= cp_type_quals (type);
8493 type = build_memfn_type (type,
8494 declarator->u.pointer.class_type,
8496 memfn_quals = TYPE_UNQUALIFIED;
8499 if (TREE_CODE (type) == FUNCTION_TYPE
8500 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8501 error ("cannot declare %s to qualified function type %qT",
8502 declarator->kind == cdk_reference ? "reference" : "pointer",
8505 if (declarator->kind == cdk_reference)
8507 /* In C++0x, the type we are creating a reference to might be
8508 a typedef which is itself a reference type. In that case,
8509 we follow the reference collapsing rules in
8510 [7.1.3/8 dcl.typedef] to create the final reference type:
8512 "If a typedef TD names a type that is a reference to a type
8513 T, an attempt to create the type 'lvalue reference to cv TD'
8514 creates the type 'lvalue reference to T,' while an attempt
8515 to create the type "rvalue reference to cv TD' creates the
8518 if (!VOID_TYPE_P (type))
8519 type = cp_build_reference_type
8520 ((TREE_CODE (type) == REFERENCE_TYPE
8521 ? TREE_TYPE (type) : type),
8522 (declarator->u.reference.rvalue_ref
8523 && (TREE_CODE(type) != REFERENCE_TYPE
8524 || TYPE_REF_IS_RVALUE (type))));
8526 /* In C++0x, we need this check for direct reference to
8527 reference declarations, which are forbidden by
8528 [8.3.2/5 dcl.ref]. Reference to reference declarations
8529 are only allowed indirectly through typedefs and template
8530 type arguments. Example:
8532 void foo(int & &); // invalid ref-to-ref decl
8534 typedef int & int_ref;
8535 void foo(int_ref &); // valid ref-to-ref decl
8537 if (inner_declarator && inner_declarator->kind == cdk_reference)
8538 error ("cannot declare reference to %q#T, which is not "
8539 "a typedef or a template type argument", type);
8541 else if (TREE_CODE (type) == METHOD_TYPE)
8542 type = build_ptrmemfunc_type (build_pointer_type (type));
8543 else if (declarator->kind == cdk_ptrmem)
8545 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8547 if (declarator->u.pointer.class_type == error_mark_node)
8548 /* We will already have complained. */
8549 type = error_mark_node;
8551 type = build_ptrmem_type (declarator->u.pointer.class_type,
8555 type = build_pointer_type (type);
8557 /* Process a list of type modifier keywords (such as
8558 const or volatile) that were given inside the `*' or `&'. */
8560 if (declarator->u.pointer.qualifiers)
8563 = cp_build_qualified_type (type,
8564 declarator->u.pointer.qualifiers);
8565 type_quals = cp_type_quals (type);
8578 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8579 && TREE_CODE (type) != FUNCTION_TYPE
8580 && TREE_CODE (type) != METHOD_TYPE)
8582 error ("template-id %qD used as a declarator",
8584 unqualified_id = dname;
8587 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8588 qualified with a class-name, turn it into a METHOD_TYPE, unless
8589 we know that the function is static. We take advantage of this
8590 opportunity to do other processing that pertains to entities
8591 explicitly declared to be class members. Note that if DECLARATOR
8592 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8593 would not have exited the loop above. */
8595 && declarator->u.id.qualifying_scope
8596 && TYPE_P (declarator->u.id.qualifying_scope))
8600 ctype = declarator->u.id.qualifying_scope;
8601 ctype = TYPE_MAIN_VARIANT (ctype);
8603 while (t != NULL_TREE && CLASS_TYPE_P (t))
8605 /* You're supposed to have one `template <...>' for every
8606 template class, but you don't need one for a full
8607 specialization. For example:
8609 template <class T> struct S{};
8610 template <> struct S<int> { void f(); };
8611 void S<int>::f () {}
8613 is correct; there shouldn't be a `template <>' for the
8614 definition of `S<int>::f'. */
8615 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8616 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8617 /* T is an explicit (not partial) specialization. All
8618 containing classes must therefore also be explicitly
8621 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8622 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8623 template_count += 1;
8625 t = TYPE_MAIN_DECL (t);
8626 t = DECL_CONTEXT (t);
8629 if (ctype == current_class_type)
8633 permerror (input_location, "member functions are implicitly friends of their class");
8637 permerror (declarator->id_loc,
8638 "extra qualification %<%T::%> on member %qs",
8641 else if (/* If the qualifying type is already complete, then we
8642 can skip the following checks. */
8643 !COMPLETE_TYPE_P (ctype)
8644 && (/* If the function is being defined, then
8645 qualifying type must certainly be complete. */
8647 /* A friend declaration of "T::f" is OK, even if
8648 "T" is a template parameter. But, if this
8649 function is not a friend, the qualifying type
8651 || (!friendp && !CLASS_TYPE_P (ctype))
8652 /* For a declaration, the type need not be
8653 complete, if either it is dependent (since there
8654 is no meaningful definition of complete in that
8655 case) or the qualifying class is currently being
8657 || !(dependent_type_p (ctype)
8658 || currently_open_class (ctype)))
8659 /* Check that the qualifying type is complete. */
8660 && !complete_type_or_else (ctype, NULL_TREE))
8661 return error_mark_node;
8662 else if (TREE_CODE (type) == FUNCTION_TYPE)
8664 tree sname = declarator->u.id.unqualified_name;
8666 if (current_class_type
8667 && (!friendp || funcdef_flag))
8670 ? "cannot define member function %<%T::%s%> within %<%T%>"
8671 : "cannot declare member function %<%T::%s%> within %<%T%>",
8672 ctype, name, current_class_type);
8673 return error_mark_node;
8676 if (TREE_CODE (sname) == IDENTIFIER_NODE
8677 && NEW_DELETE_OPNAME_P (sname))
8678 /* Overloaded operator new and operator delete
8679 are always static functions. */
8682 type = build_memfn_type (type, ctype, memfn_quals);
8684 else if (declspecs->specs[(int)ds_typedef]
8685 && current_class_type)
8687 error ("cannot declare member %<%T::%s%> within %qT",
8688 ctype, name, current_class_type);
8689 return error_mark_node;
8693 /* Now TYPE has the actual type. */
8698 *attrlist = chainon (returned_attrs, *attrlist);
8700 attrlist = &returned_attrs;
8703 /* Handle parameter packs. */
8704 if (parameter_pack_p)
8706 if (decl_context == PARM)
8707 /* Turn the type into a pack expansion.*/
8708 type = make_pack_expansion (type);
8710 error ("non-parameter %qs cannot be a parameter pack", name);
8713 /* Did array size calculations overflow? */
8715 if (TREE_CODE (type) == ARRAY_TYPE
8716 && COMPLETE_TYPE_P (type)
8717 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8718 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8720 error ("size of array %qs is too large", name);
8721 /* If we proceed with the array type as it is, we'll eventually
8722 crash in tree_low_cst(). */
8723 type = error_mark_node;
8726 if ((decl_context == FIELD || decl_context == PARM)
8727 && !processing_template_decl
8728 && variably_modified_type_p (type, NULL_TREE))
8730 if (decl_context == FIELD)
8731 error ("data member may not have variably modified type %qT", type);
8733 error ("parameter may not have variably modified type %qT", type);
8734 type = error_mark_node;
8737 if (explicitp == 1 || (explicitp && friendp))
8739 /* [dcl.fct.spec] The explicit specifier shall only be used in
8740 declarations of constructors within a class definition. */
8741 error ("only declarations of constructors can be %<explicit%>");
8745 if (storage_class == sc_mutable)
8747 if (decl_context != FIELD || friendp)
8749 error ("non-member %qs cannot be declared %<mutable%>", name);
8750 storage_class = sc_none;
8752 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8754 error ("non-object member %qs cannot be declared %<mutable%>", name);
8755 storage_class = sc_none;
8757 else if (TREE_CODE (type) == FUNCTION_TYPE
8758 || TREE_CODE (type) == METHOD_TYPE)
8760 error ("function %qs cannot be declared %<mutable%>", name);
8761 storage_class = sc_none;
8765 error ("static %qs cannot be declared %<mutable%>", name);
8766 storage_class = sc_none;
8768 else if (type_quals & TYPE_QUAL_CONST)
8770 error ("const %qs cannot be declared %<mutable%>", name);
8771 storage_class = sc_none;
8775 /* If this is declaring a typedef name, return a TYPE_DECL. */
8776 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8780 /* Note that the grammar rejects storage classes
8781 in typenames, fields or parameters. */
8782 if (current_lang_name == lang_name_java)
8783 TYPE_FOR_JAVA (type) = 1;
8785 /* This declaration:
8787 typedef void f(int) const;
8789 declares a function type which is not a member of any
8790 particular class, but which is cv-qualified; for
8791 example "f S::*" declares a pointer to a const-qualified
8792 member function of S. We record the cv-qualification in the
8794 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8796 type = cp_build_qualified_type (type, memfn_quals);
8798 /* We have now dealt with these qualifiers. */
8799 memfn_quals = TYPE_UNQUALIFIED;
8802 if (decl_context == FIELD)
8803 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8805 decl = build_decl (TYPE_DECL, unqualified_id, type);
8806 if (id_declarator && declarator->u.id.qualifying_scope) {
8807 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8808 TREE_TYPE (decl) = error_mark_node;
8811 if (decl_context != FIELD)
8813 if (!current_function_decl)
8814 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8815 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8816 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8817 (current_function_decl)))
8818 /* The TYPE_DECL is "abstract" because there will be
8819 clones of this constructor/destructor, and there will
8820 be copies of this TYPE_DECL generated in those
8822 DECL_ABSTRACT (decl) = 1;
8824 else if (constructor_name_p (unqualified_id, current_class_type))
8825 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8826 "as enclosing class",
8829 /* If the user declares "typedef struct {...} foo" then the
8830 struct will have an anonymous name. Fill that name in now.
8831 Nothing can refer to it, so nothing needs know about the name
8833 if (type != error_mark_node
8836 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8837 && TYPE_ANONYMOUS_P (type)
8838 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8842 /* Replace the anonymous name with the real name everywhere. */
8843 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8845 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8847 debug_hooks->set_name (t, decl);
8848 TYPE_NAME (t) = decl;
8852 if (TYPE_LANG_SPECIFIC (type))
8853 TYPE_WAS_ANONYMOUS (type) = 1;
8855 /* If this is a typedef within a template class, the nested
8856 type is a (non-primary) template. The name for the
8857 template needs updating as well. */
8858 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8859 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8860 = TYPE_IDENTIFIER (type);
8862 /* FIXME remangle member functions; member functions of a
8863 type with external linkage have external linkage. */
8867 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8868 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8870 bad_specifiers (decl, "type", virtualp,
8871 memfn_quals != TYPE_UNQUALIFIED,
8872 inlinep, friendp, raises != NULL_TREE);
8877 /* Detect the case of an array type of unspecified size
8878 which came, as such, direct from a typedef name.
8879 We must copy the type, so that the array's domain can be
8880 individually set by the object's initializer. */
8882 if (type && typedef_type
8883 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8884 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8885 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8887 /* Detect where we're using a typedef of function type to declare a
8888 function. PARMS will not be set, so we must create it now. */
8890 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8892 tree decls = NULL_TREE;
8895 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8897 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8899 TREE_CHAIN (decl) = decls;
8903 parms = nreverse (decls);
8905 if (decl_context != TYPENAME)
8907 /* A cv-qualifier-seq shall only be part of the function type
8908 for a non-static member function. [8.3.5/4 dcl.fct] */
8909 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8910 && (current_class_type == NULL_TREE || staticp) )
8913 ? G_("qualified function types cannot be used to "
8914 "declare static member functions")
8915 : G_("qualified function types cannot be used to "
8916 "declare free functions"));
8917 type = TYPE_MAIN_VARIANT (type);
8920 /* The qualifiers on the function type become the qualifiers on
8921 the non-static member function. */
8922 memfn_quals |= cp_type_quals (type);
8926 /* If this is a type name (such as, in a cast or sizeof),
8927 compute the type and return it now. */
8929 if (decl_context == TYPENAME)
8931 /* Note that the grammar rejects storage classes
8932 in typenames, fields or parameters. */
8933 if (type_quals != TYPE_UNQUALIFIED)
8934 type_quals = TYPE_UNQUALIFIED;
8936 /* Special case: "friend class foo" looks like a TYPENAME context. */
8939 if (type_quals != TYPE_UNQUALIFIED)
8941 error ("type qualifiers specified for friend class declaration");
8942 type_quals = TYPE_UNQUALIFIED;
8946 error ("%<inline%> specified for friend class declaration");
8952 /* Don't allow friend declaration without a class-key. */
8953 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8954 permerror (input_location, "template parameters cannot be friends");
8955 else if (TREE_CODE (type) == TYPENAME_TYPE)
8956 permerror (input_location, "friend declaration requires class-key, "
8957 "i.e. %<friend class %T::%D%>",
8958 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8960 permerror (input_location, "friend declaration requires class-key, "
8961 "i.e. %<friend %#T%>",
8965 /* Only try to do this stuff if we didn't already give up. */
8966 if (type != integer_type_node)
8968 /* A friendly class? */
8969 if (current_class_type)
8970 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8973 error ("trying to make class %qT a friend of global scope",
8976 type = void_type_node;
8979 else if (memfn_quals)
8981 if (ctype == NULL_TREE
8982 && TREE_CODE (type) == METHOD_TYPE)
8983 ctype = TYPE_METHOD_BASETYPE (type);
8986 type = build_memfn_type (type, ctype, memfn_quals);
8987 /* Core issue #547: need to allow this in template type args. */
8988 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8989 type = cp_build_qualified_type (type, memfn_quals);
8991 error ("invalid qualifiers on non-member function type");
8996 else if (unqualified_id == NULL_TREE && decl_context != PARM
8997 && decl_context != CATCHPARM
8998 && TREE_CODE (type) != UNION_TYPE
9001 error ("abstract declarator %qT used as declaration", type);
9002 return error_mark_node;
9005 /* Only functions may be declared using an operator-function-id. */
9007 && IDENTIFIER_OPNAME_P (unqualified_id)
9008 && TREE_CODE (type) != FUNCTION_TYPE
9009 && TREE_CODE (type) != METHOD_TYPE)
9011 error ("declaration of %qD as non-function", unqualified_id);
9012 return error_mark_node;
9015 /* We don't check parameter types here because we can emit a better
9016 error message later. */
9017 if (decl_context != PARM)
9019 type = check_var_type (unqualified_id, type);
9020 if (type == error_mark_node)
9021 return error_mark_node;
9024 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9025 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9027 if (decl_context == PARM || decl_context == CATCHPARM)
9029 if (ctype || in_namespace)
9030 error ("cannot use %<::%> in parameter declaration");
9032 /* A parameter declared as an array of T is really a pointer to T.
9033 One declared as a function is really a pointer to a function.
9034 One declared as a member is really a pointer to member. */
9036 if (TREE_CODE (type) == ARRAY_TYPE)
9038 /* Transfer const-ness of array into that of type pointed to. */
9039 type = build_pointer_type (TREE_TYPE (type));
9040 type_quals = TYPE_UNQUALIFIED;
9042 else if (TREE_CODE (type) == FUNCTION_TYPE)
9043 type = build_pointer_type (type);
9049 if (decl_context == PARM)
9051 decl = cp_build_parm_decl (unqualified_id, type);
9053 bad_specifiers (decl, "parameter", virtualp,
9054 memfn_quals != TYPE_UNQUALIFIED,
9055 inlinep, friendp, raises != NULL_TREE);
9057 else if (decl_context == FIELD)
9059 /* The C99 flexible array extension. */
9060 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9061 && TYPE_DOMAIN (type) == NULL_TREE)
9063 tree itype = compute_array_index_type (dname, integer_zero_node);
9064 type = build_cplus_array_type (TREE_TYPE (type), itype);
9067 if (type == error_mark_node)
9069 /* Happens when declaring arrays of sizes which
9070 are error_mark_node, for example. */
9073 else if (in_namespace && !friendp)
9075 /* Something like struct S { int N::j; }; */
9076 error ("invalid use of %<::%>");
9077 return error_mark_node;
9079 else if (TREE_CODE (type) == FUNCTION_TYPE)
9082 tree function_context;
9086 if (ctype == NULL_TREE)
9087 ctype = current_class_type;
9089 if (ctype == NULL_TREE)
9091 error ("can't make %qD into a method -- not in a class",
9093 return error_mark_node;
9096 /* ``A union may [ ... ] not [ have ] virtual functions.''
9098 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9100 error ("function %qD declared virtual inside a union",
9102 return error_mark_node;
9105 if (NEW_DELETE_OPNAME_P (unqualified_id))
9109 error ("%qD cannot be declared virtual, since it "
9115 else if (staticp < 2)
9116 type = build_memfn_type (type, ctype, memfn_quals);
9119 /* Check that the name used for a destructor makes sense. */
9120 if (sfk == sfk_destructor)
9122 tree uqname = id_declarator->u.id.unqualified_name;
9126 gcc_assert (friendp);
9127 error ("expected qualified name in friend declaration "
9128 "for destructor %qD", uqname);
9129 return error_mark_node;
9132 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9134 error ("declaration of %qD as member of %qT",
9136 return error_mark_node;
9139 else if (sfk == sfk_constructor && friendp)
9141 error ("expected qualified name in friend declaration "
9142 "for constructor %qD",
9143 id_declarator->u.id.unqualified_name);
9144 return error_mark_node;
9147 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9148 function_context = (ctype != NULL_TREE) ?
9149 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9150 publicp = (! friendp || ! staticp)
9151 && function_context == NULL_TREE;
9152 decl = grokfndecl (ctype, type,
9153 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9154 ? unqualified_id : dname,
9157 virtualp, flags, memfn_quals, raises,
9158 friendp ? -1 : 0, friendp, publicp, inlinep,
9160 funcdef_flag, template_count, in_namespace,
9161 attrlist, declarator->id_loc);
9162 if (decl == NULL_TREE)
9163 return error_mark_node;
9165 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9166 /* The decl and setting of decl_attr is also turned off. */
9167 decl = build_decl_attribute_variant (decl, decl_attr);
9170 /* [class.conv.ctor]
9172 A constructor declared without the function-specifier
9173 explicit that can be called with a single parameter
9174 specifies a conversion from the type of its first
9175 parameter to the type of its class. Such a constructor
9176 is called a converting constructor. */
9178 DECL_NONCONVERTING_P (decl) = 1;
9180 else if (TREE_CODE (type) == METHOD_TYPE)
9182 /* We only get here for friend declarations of
9183 members of other classes. */
9184 /* All method decls are public, so tell grokfndecl to set
9185 TREE_PUBLIC, also. */
9186 decl = grokfndecl (ctype, type,
9187 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9188 ? unqualified_id : dname,
9191 virtualp, flags, memfn_quals, raises,
9192 friendp ? -1 : 0, friendp, 1, 0, sfk,
9193 funcdef_flag, template_count, in_namespace,
9195 declarator->id_loc);
9196 if (decl == NULL_TREE)
9197 return error_mark_node;
9199 else if (!staticp && !dependent_type_p (type)
9200 && !COMPLETE_TYPE_P (complete_type (type))
9201 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9204 error ("field %qD has incomplete type", unqualified_id);
9206 error ("name %qT has incomplete type", type);
9208 /* If we're instantiating a template, tell them which
9209 instantiation made the field's type be incomplete. */
9210 if (current_class_type
9211 && TYPE_NAME (current_class_type)
9212 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9214 && declspecs->type == type)
9215 error (" in instantiation of template %qT",
9216 current_class_type);
9218 return error_mark_node;
9224 error ("%qE is neither function nor member function; "
9225 "cannot be declared friend", unqualified_id);
9233 /* Friends are treated specially. */
9234 if (ctype == current_class_type)
9235 ; /* We already issued a permerror. */
9236 else if (decl && DECL_NAME (decl))
9238 if (template_class_depth (current_class_type) == 0)
9240 decl = check_explicit_specialization
9241 (unqualified_id, decl, template_count,
9242 2 * funcdef_flag + 4);
9243 if (decl == error_mark_node)
9244 return error_mark_node;
9247 decl = do_friend (ctype, unqualified_id, decl,
9253 return error_mark_node;
9256 /* Structure field. It may not be a function, except for C++. */
9258 if (decl == NULL_TREE)
9264 /* An attempt is being made to initialize a non-static
9265 member. But, from [class.mem]:
9267 4 A member-declarator can contain a
9268 constant-initializer only if it declares a static
9269 member (_class.static_) of integral or enumeration
9270 type, see _class.static.data_.
9272 This used to be relatively common practice, but
9273 the rest of the compiler does not correctly
9274 handle the initialization unless the member is
9275 static so we make it static below. */
9276 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9278 permerror (input_location, "making %qD static", unqualified_id);
9282 if (uses_template_parms (type))
9283 /* We'll check at instantiation time. */
9285 else if (check_static_variable_definition (unqualified_id,
9287 /* If we just return the declaration, crashes
9288 will sometimes occur. We therefore return
9289 void_type_node, as if this was a friend
9290 declaration, to cause callers to completely
9291 ignore this declaration. */
9292 return error_mark_node;
9297 /* C++ allows static class members. All other work
9298 for this is done by grokfield. */
9299 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9300 set_linkage_for_static_data_member (decl);
9301 /* Even if there is an in-class initialization, DECL
9302 is considered undefined until an out-of-class
9303 definition is provided. */
9304 DECL_EXTERNAL (decl) = 1;
9307 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9311 decl = build_decl (FIELD_DECL, unqualified_id, type);
9312 DECL_NONADDRESSABLE_P (decl) = bitfield;
9313 if (bitfield && !unqualified_id)
9314 TREE_NO_WARNING (decl) = 1;
9316 if (storage_class == sc_mutable)
9318 DECL_MUTABLE_P (decl) = 1;
9319 storage_class = sc_none;
9323 bad_specifiers (decl, "field", virtualp,
9324 memfn_quals != TYPE_UNQUALIFIED,
9325 inlinep, friendp, raises != NULL_TREE);
9328 else if (TREE_CODE (type) == FUNCTION_TYPE
9329 || TREE_CODE (type) == METHOD_TYPE)
9334 if (!unqualified_id)
9335 return error_mark_node;
9337 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9338 original_name = dname;
9340 original_name = unqualified_id;
9342 if (storage_class == sc_auto)
9343 error ("storage class %<auto%> invalid for function %qs", name);
9344 else if (storage_class == sc_register)
9345 error ("storage class %<register%> invalid for function %qs", name);
9347 error ("storage class %<__thread%> invalid for function %qs", name);
9349 /* Function declaration not at top level.
9350 Storage classes other than `extern' are not allowed
9351 and `extern' makes no difference. */
9352 if (! toplevel_bindings_p ()
9353 && (storage_class == sc_static
9354 || declspecs->specs[(int)ds_inline])
9357 if (storage_class == sc_static)
9358 pedwarn (input_location, OPT_pedantic,
9359 "%<static%> specified invalid for function %qs "
9360 "declared out of global scope", name);
9362 pedwarn (input_location, OPT_pedantic,
9363 "%<inline%> specifier invalid for function %qs "
9364 "declared out of global scope", name);
9367 if (ctype != NULL_TREE
9368 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9370 error ("%q#T is not a class or a namespace", ctype);
9374 if (ctype == NULL_TREE)
9378 error ("virtual non-class function %qs", name);
9381 else if (sfk == sfk_constructor
9382 || sfk == sfk_destructor)
9385 ? "%qs defined in a non-class scope"
9386 : "%qs declared in a non-class scope", name);
9390 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9391 && !NEW_DELETE_OPNAME_P (original_name))
9392 type = build_method_type_directly (ctype,
9394 TYPE_ARG_TYPES (type));
9396 /* Record presence of `static'. */
9397 publicp = (ctype != NULL_TREE
9398 || storage_class == sc_extern
9399 || storage_class != sc_static);
9401 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9402 virtualp, flags, memfn_quals, raises,
9404 publicp, inlinep, sfk, funcdef_flag,
9405 template_count, in_namespace, attrlist,
9406 declarator->id_loc);
9407 if (decl == NULL_TREE)
9408 return error_mark_node;
9412 int invalid_static = 0;
9414 /* Don't allow a static member function in a class, and forbid
9415 declaring main to be static. */
9416 if (TREE_CODE (type) == METHOD_TYPE)
9418 permerror (input_location, "cannot declare member function %qD to have "
9419 "static linkage", decl);
9422 else if (current_function_decl)
9424 /* FIXME need arm citation */
9425 error ("cannot declare static function inside another function");
9432 storage_class = sc_none;
9438 /* It's a variable. */
9440 /* An uninitialized decl with `extern' is a reference. */
9441 decl = grokvardecl (type, unqualified_id,
9444 (type_quals & TYPE_QUAL_CONST) != 0,
9445 ctype ? ctype : in_namespace);
9446 bad_specifiers (decl, "variable", virtualp,
9447 memfn_quals != TYPE_UNQUALIFIED,
9448 inlinep, friendp, raises != NULL_TREE);
9452 DECL_CONTEXT (decl) = ctype;
9455 permerror (input_location, "%<static%> may not be used when defining "
9456 "(as opposed to declaring) a static data member");
9458 storage_class = sc_none;
9460 if (storage_class == sc_register && TREE_STATIC (decl))
9462 error ("static member %qD declared %<register%>", decl);
9463 storage_class = sc_none;
9465 if (storage_class == sc_extern && pedantic)
9467 pedwarn (input_location, OPT_pedantic,
9468 "cannot explicitly declare member %q#D to have "
9469 "extern linkage", decl);
9470 storage_class = sc_none;
9475 if (storage_class == sc_extern && initialized && !funcdef_flag)
9477 if (toplevel_bindings_p ())
9479 /* It's common practice (and completely valid) to have a const
9480 be initialized and declared extern. */
9481 if (!(type_quals & TYPE_QUAL_CONST))
9482 warning (0, "%qs initialized and declared %<extern%>", name);
9486 error ("%qs has both %<extern%> and initializer", name);
9487 return error_mark_node;
9491 /* Record `register' declaration for warnings on &
9492 and in case doing stupid register allocation. */
9494 if (storage_class == sc_register)
9495 DECL_REGISTER (decl) = 1;
9496 else if (storage_class == sc_extern)
9497 DECL_THIS_EXTERN (decl) = 1;
9498 else if (storage_class == sc_static)
9499 DECL_THIS_STATIC (decl) = 1;
9501 /* Record constancy and volatility on the DECL itself . There's
9502 no need to do this when processing a template; we'll do this
9503 for the instantiated declaration based on the type of DECL. */
9504 if (!processing_template_decl)
9505 cp_apply_type_quals_to_decl (type_quals, decl);
9508 TREE_NO_WARNING (decl) = 1;
9514 /* Subroutine of start_function. Ensure that each of the parameter
9515 types (as listed in PARMS) is complete, as is required for a
9516 function definition. */
9519 require_complete_types_for_parms (tree parms)
9521 for (; parms; parms = TREE_CHAIN (parms))
9523 if (dependent_type_p (TREE_TYPE (parms)))
9525 if (!VOID_TYPE_P (TREE_TYPE (parms))
9526 && complete_type_or_else (TREE_TYPE (parms), parms))
9528 relayout_decl (parms);
9529 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9532 /* grokparms or complete_type_or_else will have already issued
9534 TREE_TYPE (parms) = error_mark_node;
9538 /* Returns nonzero if T is a local variable. */
9541 local_variable_p (const_tree t)
9543 if ((TREE_CODE (t) == VAR_DECL
9544 /* A VAR_DECL with a context that is a _TYPE is a static data
9546 && !TYPE_P (CP_DECL_CONTEXT (t))
9547 /* Any other non-local variable must be at namespace scope. */
9548 && !DECL_NAMESPACE_SCOPE_P (t))
9549 || (TREE_CODE (t) == PARM_DECL))
9555 /* Like local_variable_p, but suitable for use as a tree-walking
9559 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9560 void *data ATTRIBUTE_UNUSED)
9562 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9564 else if (TYPE_P (*tp))
9571 /* Check that ARG, which is a default-argument expression for a
9572 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9573 something goes wrong. DECL may also be a _TYPE node, rather than a
9574 DECL, if there is no DECL available. */
9577 check_default_argument (tree decl, tree arg)
9582 if (TREE_CODE (arg) == DEFAULT_ARG)
9583 /* We get a DEFAULT_ARG when looking at an in-class declaration
9584 with a default argument. Ignore the argument for now; we'll
9585 deal with it after the class is complete. */
9594 decl_type = TREE_TYPE (decl);
9596 if (arg == error_mark_node
9597 || decl == error_mark_node
9598 || TREE_TYPE (arg) == error_mark_node
9599 || decl_type == error_mark_node)
9600 /* Something already went wrong. There's no need to check
9602 return error_mark_node;
9604 /* [dcl.fct.default]
9606 A default argument expression is implicitly converted to the
9608 if (!TREE_TYPE (arg)
9609 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9612 error ("default argument for %q#D has type %qT",
9613 decl, TREE_TYPE (arg));
9615 error ("default argument for parameter of type %qT has type %qT",
9616 decl_type, TREE_TYPE (arg));
9618 return error_mark_node;
9621 /* [dcl.fct.default]
9623 Local variables shall not be used in default argument
9626 The keyword `this' shall not be used in a default argument of a
9628 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9631 error ("default argument %qE uses local variable %qD", arg, var);
9632 return error_mark_node;
9639 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9642 type_is_deprecated (tree type)
9644 enum tree_code code;
9645 if (TREE_DEPRECATED (type))
9647 if (TYPE_NAME (type)
9648 && TREE_DEPRECATED (TYPE_NAME (type)))
9651 code = TREE_CODE (type);
9653 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9654 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9655 || code == METHOD_TYPE || code == ARRAY_TYPE)
9656 return type_is_deprecated (TREE_TYPE (type));
9658 if (TYPE_PTRMEMFUNC_P (type))
9659 return type_is_deprecated
9660 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9665 /* Decode the list of parameter types for a function type.
9666 Given the list of things declared inside the parens,
9667 return a list of types.
9669 If this parameter does not end with an ellipsis, we append
9672 *PARMS is set to the chain of PARM_DECLs created. */
9675 grokparms (tree parmlist, tree *parms)
9677 tree result = NULL_TREE;
9678 tree decls = NULL_TREE;
9682 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9684 tree type = NULL_TREE;
9685 tree init = TREE_PURPOSE (parm);
9686 tree decl = TREE_VALUE (parm);
9689 if (parm == void_list_node)
9692 if (! decl || TREE_TYPE (decl) == error_mark_node)
9695 type = TREE_TYPE (decl);
9696 if (VOID_TYPE_P (type))
9698 if (same_type_p (type, void_type_node)
9699 && DECL_SELF_REFERENCE_P (type)
9700 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9701 /* this is a parmlist of `(void)', which is ok. */
9703 cxx_incomplete_type_error (decl, type);
9704 /* It's not a good idea to actually create parameters of
9705 type `void'; other parts of the compiler assume that a
9706 void type terminates the parameter list. */
9707 type = error_mark_node;
9708 TREE_TYPE (decl) = error_mark_node;
9711 if (type != error_mark_node
9712 && TYPE_FOR_JAVA (type)
9713 && MAYBE_CLASS_TYPE_P (type))
9715 error ("parameter %qD has Java class type", decl);
9716 type = error_mark_node;
9717 TREE_TYPE (decl) = error_mark_node;
9721 if (type != error_mark_node
9722 && (errmsg = targetm.invalid_parameter_type (type)))
9725 type = error_mark_node;
9726 TREE_TYPE (decl) = error_mark_node;
9729 if (type != error_mark_node)
9731 if (deprecated_state != DEPRECATED_SUPPRESS)
9733 tree deptype = type_is_deprecated (type);
9735 warn_deprecated_use (deptype, NULL_TREE);
9738 /* Top-level qualifiers on the parameters are
9739 ignored for function types. */
9740 type = cp_build_qualified_type (type, 0);
9741 if (TREE_CODE (type) == METHOD_TYPE)
9743 error ("parameter %qD invalidly declared method type", decl);
9744 type = build_pointer_type (type);
9745 TREE_TYPE (decl) = type;
9747 else if (abstract_virtuals_error (decl, type))
9748 any_error = 1; /* Seems like a good idea. */
9749 else if (POINTER_TYPE_P (type))
9751 /* [dcl.fct]/6, parameter types cannot contain pointers
9752 (references) to arrays of unknown bound. */
9753 tree t = TREE_TYPE (type);
9754 int ptr = TYPE_PTR_P (type);
9760 else if (TREE_CODE (t) != ARRAY_TYPE)
9762 else if (!TYPE_DOMAIN (t))
9766 if (TREE_CODE (t) == ARRAY_TYPE)
9767 error ("parameter %qD includes %s to array of unknown "
9769 decl, ptr ? "pointer" : "reference", t);
9774 else if (init && !processing_template_decl)
9775 init = check_default_argument (decl, init);
9778 if (TREE_CODE (decl) == PARM_DECL
9779 && FUNCTION_PARAMETER_PACK_P (decl)
9780 && TREE_CHAIN (parm)
9781 && TREE_CHAIN (parm) != void_list_node)
9782 error ("parameter packs must be at the end of the parameter list");
9784 TREE_CHAIN (decl) = decls;
9786 result = tree_cons (init, type, result);
9788 decls = nreverse (decls);
9789 result = nreverse (result);
9791 result = chainon (result, void_list_node);
9798 /* D is a constructor or overloaded `operator='.
9800 Let T be the class in which D is declared. Then, this function
9803 -1 if D's is an ill-formed constructor or copy assignment operator
9804 whose first parameter is of type `T'.
9805 0 if D is not a copy constructor or copy assignment
9807 1 if D is a copy constructor or copy assignment operator whose
9808 first parameter is a reference to const qualified T.
9809 2 if D is a copy constructor or copy assignment operator whose
9810 first parameter is a reference to non-const qualified T.
9812 This function can be used as a predicate. Positive values indicate
9813 a copy constructor and nonzero values indicate a copy assignment
9817 copy_fn_p (const_tree d)
9823 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9825 if (TREE_CODE (d) == TEMPLATE_DECL
9826 || (DECL_TEMPLATE_INFO (d)
9827 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9828 /* Instantiations of template member functions are never copy
9829 functions. Note that member functions of templated classes are
9830 represented as template functions internally, and we must
9831 accept those as copy functions. */
9834 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9838 arg_type = TREE_VALUE (args);
9839 if (arg_type == error_mark_node)
9842 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9844 /* Pass by value copy assignment operator. */
9847 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9848 && !TYPE_REF_IS_RVALUE (arg_type)
9849 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9851 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9857 args = TREE_CHAIN (args);
9859 if (args && args != void_list_node && !TREE_PURPOSE (args))
9860 /* There are more non-optional args. */
9866 /* D is a constructor or overloaded `operator='.
9868 Let T be the class in which D is declared. Then, this function
9869 returns true when D is a move constructor or move assignment
9870 operator, false otherwise. */
9873 move_fn_p (const_tree d)
9877 bool result = false;
9879 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9881 if (cxx_dialect == cxx98)
9882 /* There are no move constructors if we are in C++98 mode. */
9885 if (TREE_CODE (d) == TEMPLATE_DECL
9886 || (DECL_TEMPLATE_INFO (d)
9887 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9888 /* Instantiations of template member functions are never copy
9889 functions. Note that member functions of templated classes are
9890 represented as template functions internally, and we must
9891 accept those as copy functions. */
9894 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9898 arg_type = TREE_VALUE (args);
9899 if (arg_type == error_mark_node)
9902 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9903 && TYPE_REF_IS_RVALUE (arg_type)
9904 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9908 args = TREE_CHAIN (args);
9910 if (args && args != void_list_node && !TREE_PURPOSE (args))
9911 /* There are more non-optional args. */
9917 /* Remember any special properties of member function DECL. */
9920 grok_special_member_properties (tree decl)
9924 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9927 class_type = DECL_CONTEXT (decl);
9928 if (DECL_CONSTRUCTOR_P (decl))
9930 int ctor = copy_fn_p (decl);
9932 if (!DECL_ARTIFICIAL (decl))
9933 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9939 A non-template constructor for class X is a copy
9940 constructor if its first parameter is of type X&, const
9941 X&, volatile X& or const volatile X&, and either there
9942 are no other parameters or else all other parameters have
9943 default arguments. */
9944 TYPE_HAS_INIT_REF (class_type) = 1;
9945 if (!DECL_DEFAULTED_FN (decl))
9946 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9948 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9950 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9952 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9953 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9954 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9956 else if (is_list_ctor (decl))
9957 TYPE_HAS_LIST_CTOR (class_type) = 1;
9959 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9963 A non-template assignment operator for class X is a copy
9964 assignment operator if its parameter is of type X, X&, const
9965 X&, volatile X& or const volatile X&. */
9967 int assop = copy_fn_p (decl);
9971 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9972 if (!DECL_DEFAULTED_FN (decl))
9973 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9975 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9980 /* Check a constructor DECL has the correct form. Complains
9981 if the class has a constructor of the form X(X). */
9984 grok_ctor_properties (const_tree ctype, const_tree decl)
9986 int ctor_parm = copy_fn_p (decl);
9992 A declaration of a constructor for a class X is ill-formed if
9993 its first parameter is of type (optionally cv-qualified) X
9994 and either there are no other parameters or else all other
9995 parameters have default arguments.
9997 We *don't* complain about member template instantiations that
9998 have this form, though; they can occur as we try to decide
9999 what constructor to use during overload resolution. Since
10000 overload resolution will never prefer such a constructor to
10001 the non-template copy constructor (which is either explicitly
10002 or implicitly defined), there's no need to worry about their
10003 existence. Theoretically, they should never even be
10004 instantiated, but that's hard to forestall. */
10005 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10013 /* An operator with this code is unary, but can also be binary. */
10016 ambi_op_p (enum tree_code code)
10018 return (code == INDIRECT_REF
10019 || code == ADDR_EXPR
10020 || code == UNARY_PLUS_EXPR
10021 || code == NEGATE_EXPR
10022 || code == PREINCREMENT_EXPR
10023 || code == PREDECREMENT_EXPR);
10026 /* An operator with this name can only be unary. */
10029 unary_op_p (enum tree_code code)
10031 return (code == TRUTH_NOT_EXPR
10032 || code == BIT_NOT_EXPR
10033 || code == COMPONENT_REF
10034 || code == TYPE_EXPR);
10037 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10038 errors are issued for invalid declarations. */
10041 grok_op_properties (tree decl, bool complain)
10043 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10045 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10046 tree name = DECL_NAME (decl);
10047 enum tree_code operator_code;
10052 /* Count the number of arguments and check for ellipsis. */
10053 for (argtype = argtypes, arity = 0;
10054 argtype && argtype != void_list_node;
10055 argtype = TREE_CHAIN (argtype))
10057 ellipsis_p = !argtype;
10059 class_type = DECL_CONTEXT (decl);
10060 if (class_type && !CLASS_TYPE_P (class_type))
10061 class_type = NULL_TREE;
10063 if (DECL_CONV_FN_P (decl))
10064 operator_code = TYPE_EXPR;
10068 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10069 if (ansi_opname (CODE) == name) \
10071 operator_code = (CODE); \
10074 else if (ansi_assopname (CODE) == name) \
10076 operator_code = (CODE); \
10077 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10081 #include "operators.def"
10082 #undef DEF_OPERATOR
10084 gcc_unreachable ();
10087 gcc_assert (operator_code != MAX_TREE_CODES);
10088 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10091 switch (operator_code)
10094 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10098 TYPE_GETS_DELETE (class_type) |= 1;
10102 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10105 case VEC_DELETE_EXPR:
10106 TYPE_GETS_DELETE (class_type) |= 2;
10113 /* [basic.std.dynamic.allocation]/1:
10115 A program is ill-formed if an allocation function is declared
10116 in a namespace scope other than global scope or declared static
10119 The same also holds true for deallocation functions. */
10120 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10121 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10123 if (DECL_NAMESPACE_SCOPE_P (decl))
10125 if (CP_DECL_CONTEXT (decl) != global_namespace)
10127 error ("%qD may not be declared within a namespace", decl);
10130 else if (!TREE_PUBLIC (decl))
10132 error ("%qD may not be declared as static", decl);
10138 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10140 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10141 DECL_IS_OPERATOR_NEW (decl) = 1;
10143 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10144 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10147 /* An operator function must either be a non-static member function
10148 or have at least one parameter of a class, a reference to a class,
10149 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10150 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10152 if (operator_code == TYPE_EXPR
10153 || operator_code == CALL_EXPR
10154 || operator_code == COMPONENT_REF
10155 || operator_code == ARRAY_REF
10156 || operator_code == NOP_EXPR)
10158 error ("%qD must be a nonstatic member function", decl);
10165 if (DECL_STATIC_FUNCTION_P (decl))
10167 error ("%qD must be either a non-static member "
10168 "function or a non-member function", decl);
10172 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10174 tree arg = non_reference (TREE_VALUE (p));
10175 if (arg == error_mark_node)
10178 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10179 because these checks are performed even on
10180 template functions. */
10181 if (MAYBE_CLASS_TYPE_P (arg)
10182 || TREE_CODE (arg) == ENUMERAL_TYPE)
10186 if (!p || p == void_list_node)
10189 error ("%qD must have an argument of class or "
10190 "enumerated type", decl);
10196 /* There are no restrictions on the arguments to an overloaded
10198 if (operator_code == CALL_EXPR)
10201 /* Warn about conversion operators that will never be used. */
10202 if (IDENTIFIER_TYPENAME_P (name)
10203 && ! DECL_TEMPLATE_INFO (decl)
10205 /* Warn only declaring the function; there is no need to
10206 warn again about out-of-class definitions. */
10207 && class_type == current_class_type)
10209 tree t = TREE_TYPE (name);
10210 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10211 const char *what = 0;
10214 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10216 if (TREE_CODE (t) == VOID_TYPE)
10218 else if (class_type)
10220 if (t == class_type)
10221 what = "the same type";
10222 /* Don't force t to be complete here. */
10223 else if (MAYBE_CLASS_TYPE_P (t)
10224 && COMPLETE_TYPE_P (t)
10225 && DERIVED_FROM_P (t, class_type))
10226 what = "a base class";
10230 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10231 "conversion operator",
10232 ref ? "a reference to " : "", what);
10235 if (operator_code == COND_EXPR)
10238 error ("ISO C++ prohibits overloading operator ?:");
10241 else if (ellipsis_p)
10243 error ("%qD must not have variable number of arguments", decl);
10246 else if (ambi_op_p (operator_code))
10249 /* We pick the one-argument operator codes by default, so
10250 we don't have to change anything. */
10252 else if (arity == 2)
10254 /* If we thought this was a unary operator, we now know
10255 it to be a binary operator. */
10256 switch (operator_code)
10259 operator_code = MULT_EXPR;
10263 operator_code = BIT_AND_EXPR;
10266 case UNARY_PLUS_EXPR:
10267 operator_code = PLUS_EXPR;
10271 operator_code = MINUS_EXPR;
10274 case PREINCREMENT_EXPR:
10275 operator_code = POSTINCREMENT_EXPR;
10278 case PREDECREMENT_EXPR:
10279 operator_code = POSTDECREMENT_EXPR;
10283 gcc_unreachable ();
10286 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10288 if ((operator_code == POSTINCREMENT_EXPR
10289 || operator_code == POSTDECREMENT_EXPR)
10290 && ! processing_template_decl
10291 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10294 error ("postfix %qD must take %<int%> as its argument",
10297 error ("postfix %qD must take %<int%> as its second "
10305 error ("%qD must take either zero or one argument", decl);
10307 error ("%qD must take either one or two arguments", decl);
10311 /* More Effective C++ rule 6. */
10313 && (operator_code == POSTINCREMENT_EXPR
10314 || operator_code == POSTDECREMENT_EXPR
10315 || operator_code == PREINCREMENT_EXPR
10316 || operator_code == PREDECREMENT_EXPR))
10318 tree arg = TREE_VALUE (argtypes);
10319 tree ret = TREE_TYPE (TREE_TYPE (decl));
10320 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10321 arg = TREE_TYPE (arg);
10322 arg = TYPE_MAIN_VARIANT (arg);
10323 if (operator_code == PREINCREMENT_EXPR
10324 || operator_code == PREDECREMENT_EXPR)
10326 if (TREE_CODE (ret) != REFERENCE_TYPE
10327 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10329 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10330 build_reference_type (arg));
10334 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10335 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10339 else if (unary_op_p (operator_code))
10344 error ("%qD must take %<void%>", decl);
10346 error ("%qD must take exactly one argument", decl);
10350 else /* if (binary_op_p (operator_code)) */
10355 error ("%qD must take exactly one argument", decl);
10357 error ("%qD must take exactly two arguments", decl);
10361 /* More Effective C++ rule 7. */
10363 && (operator_code == TRUTH_ANDIF_EXPR
10364 || operator_code == TRUTH_ORIF_EXPR
10365 || operator_code == COMPOUND_EXPR))
10366 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10370 /* Effective C++ rule 23. */
10373 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10374 && (operator_code == PLUS_EXPR
10375 || operator_code == MINUS_EXPR
10376 || operator_code == TRUNC_DIV_EXPR
10377 || operator_code == MULT_EXPR
10378 || operator_code == TRUNC_MOD_EXPR)
10379 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10380 warning (OPT_Weffc__, "%qD should return by value", decl);
10382 /* [over.oper]/8 */
10383 for (; argtypes && argtypes != void_list_node;
10384 argtypes = TREE_CHAIN (argtypes))
10385 if (TREE_PURPOSE (argtypes))
10387 TREE_PURPOSE (argtypes) = NULL_TREE;
10388 if (operator_code == POSTINCREMENT_EXPR
10389 || operator_code == POSTDECREMENT_EXPR)
10391 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10396 error ("%qD cannot have default arguments", decl);
10404 /* Return a string giving the keyword associate with CODE. */
10406 static const char *
10407 tag_name (enum tag_types code)
10419 case typename_type:
10422 gcc_unreachable ();
10426 /* Name lookup in an elaborated-type-specifier (after the keyword
10427 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10428 elaborated-type-specifier is invalid, issue a diagnostic and return
10429 error_mark_node; otherwise, return the *_TYPE to which it referred.
10430 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10433 check_elaborated_type_specifier (enum tag_types tag_code,
10435 bool allow_template_p)
10441 struct S { struct S *p; };
10443 name lookup will find the TYPE_DECL for the implicit "S::S"
10444 typedef. Adjust for that here. */
10445 if (DECL_SELF_REFERENCE_P (decl))
10446 decl = TYPE_NAME (TREE_TYPE (decl));
10448 type = TREE_TYPE (decl);
10450 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10451 is false for this case as well. */
10452 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10454 error ("using template type parameter %qT after %qs",
10455 type, tag_name (tag_code));
10456 return error_mark_node;
10460 If the identifier resolves to a typedef-name or a template
10461 type-parameter, the elaborated-type-specifier is ill-formed.
10463 In other words, the only legitimate declaration to use in the
10464 elaborated type specifier is the implicit typedef created when
10465 the type is declared. */
10466 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10467 && tag_code != typename_type)
10469 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10470 error ("%q+D has a previous declaration here", decl);
10471 return error_mark_node;
10473 else if (TREE_CODE (type) != RECORD_TYPE
10474 && TREE_CODE (type) != UNION_TYPE
10475 && tag_code != enum_type
10476 && tag_code != typename_type)
10478 error ("%qT referred to as %qs", type, tag_name (tag_code));
10479 error ("%q+T has a previous declaration here", type);
10480 return error_mark_node;
10482 else if (TREE_CODE (type) != ENUMERAL_TYPE
10483 && tag_code == enum_type)
10485 error ("%qT referred to as enum", type);
10486 error ("%q+T has a previous declaration here", type);
10487 return error_mark_node;
10489 else if (!allow_template_p
10490 && TREE_CODE (type) == RECORD_TYPE
10491 && CLASSTYPE_IS_TEMPLATE (type))
10493 /* If a class template appears as elaborated type specifier
10494 without a template header such as:
10496 template <class T> class C {};
10497 void f(class C); // No template header here
10499 then the required template argument is missing. */
10500 error ("template argument required for %<%s %T%>",
10501 tag_name (tag_code),
10502 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10503 return error_mark_node;
10509 /* Lookup NAME in elaborate type specifier in scope according to
10510 SCOPE and issue diagnostics if necessary.
10511 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10512 found, and ERROR_MARK_NODE for type error. */
10515 lookup_and_check_tag (enum tag_types tag_code, tree name,
10516 tag_scope scope, bool template_header_p)
10520 if (scope == ts_global)
10522 /* First try ordinary name lookup, ignoring hidden class name
10523 injected via friend declaration. */
10524 decl = lookup_name_prefer_type (name, 2);
10525 /* If that fails, the name will be placed in the smallest
10526 non-class, non-function-prototype scope according to 3.3.1/5.
10527 We may already have a hidden name declared as friend in this
10528 scope. So lookup again but not ignoring hidden names.
10529 If we find one, that name will be made visible rather than
10530 creating a new tag. */
10532 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10535 decl = lookup_type_scope (name, scope);
10537 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10538 decl = DECL_TEMPLATE_RESULT (decl);
10540 if (decl && TREE_CODE (decl) == TYPE_DECL)
10542 /* Look for invalid nested type:
10546 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10548 error ("%qD has the same name as the class in which it is "
10551 return error_mark_node;
10554 /* Two cases we need to consider when deciding if a class
10555 template is allowed as an elaborated type specifier:
10556 1. It is a self reference to its own class.
10557 2. It comes with a template header.
10561 template <class T> class C {
10562 class C *c1; // DECL_SELF_REFERENCE_P is true
10565 template <class U> class C; // template_header_p is true
10566 template <class T> class C<T>::D {
10567 class C *c2; // DECL_SELF_REFERENCE_P is true
10570 t = check_elaborated_type_specifier (tag_code,
10573 | DECL_SELF_REFERENCE_P (decl));
10576 else if (decl && TREE_CODE (decl) == TREE_LIST)
10578 error ("reference to %qD is ambiguous", name);
10579 print_candidates (decl);
10580 return error_mark_node;
10586 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10587 Define the tag as a forward-reference if it is not defined.
10589 If a declaration is given, process it here, and report an error if
10590 multiple declarations are not identical.
10592 SCOPE is TS_CURRENT when this is also a definition. Only look in
10593 the current frame for the name (since C++ allows new names in any
10594 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10595 declaration. Only look beginning from the current scope outward up
10596 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10598 TEMPLATE_HEADER_P is true when this declaration is preceded by
10599 a set of template parameters. */
10602 xref_tag (enum tag_types tag_code, tree name,
10603 tag_scope scope, bool template_header_p)
10605 enum tree_code code;
10607 tree context = NULL_TREE;
10609 timevar_push (TV_NAME_LOOKUP);
10611 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10617 code = RECORD_TYPE;
10623 code = ENUMERAL_TYPE;
10626 gcc_unreachable ();
10629 /* In case of anonymous name, xref_tag is only called to
10630 make type node and push name. Name lookup is not required. */
10631 if (ANON_AGGRNAME_P (name))
10634 t = lookup_and_check_tag (tag_code, name,
10635 scope, template_header_p);
10637 if (t == error_mark_node)
10638 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10640 if (scope != ts_current && t && current_class_type
10641 && template_class_depth (current_class_type)
10642 && template_header_p)
10644 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10645 definition of this tag. Since, in addition, we are currently
10646 processing a (member) template declaration of a template
10647 class, we must be very careful; consider:
10654 { template <class V>
10655 friend struct S1; };
10657 Here, the S2::S1 declaration should not be confused with the
10658 outer declaration. In particular, the inner version should
10659 have a template parameter of level 2, not level 1. This
10660 would be particularly important if the member declaration
10663 template <class V = U> friend struct S1;
10665 say, when we should tsubst into `U' when instantiating
10666 S2. On the other hand, when presented with:
10676 we must find the inner binding eventually. We
10677 accomplish this by making sure that the new type we
10678 create to represent this declaration has the right
10680 context = TYPE_CONTEXT (t);
10686 /* If no such tag is yet defined, create a forward-reference node
10687 and record it as the "definition".
10688 When a real declaration of this type is found,
10689 the forward-reference will be altered into a real type. */
10690 if (code == ENUMERAL_TYPE)
10692 error ("use of enum %q#D without previous declaration", name);
10693 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10697 t = make_class_type (code);
10698 TYPE_CONTEXT (t) = context;
10699 t = pushtag (name, t, scope);
10704 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10706 if (!redeclare_class_template (t, current_template_parms))
10707 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10709 else if (!processing_template_decl
10710 && CLASS_TYPE_P (t)
10711 && CLASSTYPE_IS_TEMPLATE (t))
10713 error ("redeclaration of %qT as a non-template", t);
10714 error ("previous declaration %q+D", t);
10715 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10718 /* Make injected friend class visible. */
10719 if (scope != ts_within_enclosing_non_class
10720 && hidden_name_p (TYPE_NAME (t)))
10722 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10723 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10725 if (TYPE_TEMPLATE_INFO (t))
10727 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10728 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10733 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10737 xref_tag_from_type (tree old, tree id, tag_scope scope)
10739 enum tag_types tag_kind;
10741 if (TREE_CODE (old) == RECORD_TYPE)
10742 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10744 tag_kind = union_type;
10746 if (id == NULL_TREE)
10747 id = TYPE_IDENTIFIER (old);
10749 return xref_tag (tag_kind, id, scope, false);
10752 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10753 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10754 access_* node, and the TREE_VALUE is the type of the base-class.
10755 Non-NULL TREE_TYPE indicates virtual inheritance.
10757 Returns true if the binfo hierarchy was successfully created,
10758 false if an error was detected. */
10761 xref_basetypes (tree ref, tree base_list)
10764 tree binfo, base_binfo;
10765 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10766 unsigned max_bases = 0; /* Maximum direct bases. */
10768 tree default_access;
10769 tree igo_prev; /* Track Inheritance Graph Order. */
10771 if (ref == error_mark_node)
10774 /* The base of a derived class is private by default, all others are
10776 default_access = (TREE_CODE (ref) == RECORD_TYPE
10777 && CLASSTYPE_DECLARED_CLASS (ref)
10778 ? access_private_node : access_public_node);
10780 /* First, make sure that any templates in base-classes are
10781 instantiated. This ensures that if we call ourselves recursively
10782 we do not get confused about which classes are marked and which
10784 basep = &base_list;
10787 tree basetype = TREE_VALUE (*basep);
10789 if (!(processing_template_decl && uses_template_parms (basetype))
10790 && !complete_type_or_else (basetype, NULL))
10791 /* An incomplete type. Remove it from the list. */
10792 *basep = TREE_CHAIN (*basep);
10796 if (TREE_TYPE (*basep))
10798 if (CLASS_TYPE_P (basetype))
10799 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10800 basep = &TREE_CHAIN (*basep);
10804 TYPE_MARKED_P (ref) = 1;
10806 /* The binfo slot should be empty, unless this is an (ill-formed)
10808 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10809 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10811 binfo = make_tree_binfo (max_bases);
10813 TYPE_BINFO (ref) = binfo;
10814 BINFO_OFFSET (binfo) = size_zero_node;
10815 BINFO_TYPE (binfo) = ref;
10817 /* Apply base-class info set up to the variants of this type. */
10818 fixup_type_variants (ref);
10822 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10823 /* An aggregate cannot have baseclasses. */
10824 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10826 if (TREE_CODE (ref) == UNION_TYPE)
10828 error ("derived union %qT invalid", ref);
10835 if (TYPE_FOR_JAVA (ref))
10837 error ("Java class %qT cannot have multiple bases", ref);
10844 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10846 if (TYPE_FOR_JAVA (ref))
10848 error ("Java class %qT cannot have virtual bases", ref);
10853 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10855 tree access = TREE_PURPOSE (base_list);
10856 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10857 tree basetype = TREE_VALUE (base_list);
10859 if (access == access_default_node)
10860 access = default_access;
10862 if (PACK_EXPANSION_P (basetype))
10863 basetype = PACK_EXPANSION_PATTERN (basetype);
10864 if (TREE_CODE (basetype) == TYPE_DECL)
10865 basetype = TREE_TYPE (basetype);
10866 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10868 error ("base type %qT fails to be a struct or class type",
10873 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10874 TYPE_FOR_JAVA (ref) = 1;
10876 base_binfo = NULL_TREE;
10877 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10879 base_binfo = TYPE_BINFO (basetype);
10880 /* The original basetype could have been a typedef'd type. */
10881 basetype = BINFO_TYPE (base_binfo);
10883 /* Inherit flags from the base. */
10884 TYPE_HAS_NEW_OPERATOR (ref)
10885 |= TYPE_HAS_NEW_OPERATOR (basetype);
10886 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10887 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10888 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10889 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10890 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10891 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10892 CLASSTYPE_REPEATED_BASE_P (ref)
10893 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10896 /* We must do this test after we've seen through a typedef
10898 if (TYPE_MARKED_P (basetype))
10900 if (basetype == ref)
10901 error ("recursive type %qT undefined", basetype);
10903 error ("duplicate base type %qT invalid", basetype);
10907 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10908 /* Regenerate the pack expansion for the bases. */
10909 basetype = make_pack_expansion (basetype);
10911 TYPE_MARKED_P (basetype) = 1;
10913 base_binfo = copy_binfo (base_binfo, basetype, ref,
10914 &igo_prev, via_virtual);
10915 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10916 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10918 BINFO_BASE_APPEND (binfo, base_binfo);
10919 BINFO_BASE_ACCESS_APPEND (binfo, access);
10922 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10923 /* If we have space in the vbase vector, we must have shared at
10924 least one of them, and are therefore diamond shaped. */
10925 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10927 /* Unmark all the types. */
10928 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10929 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10930 TYPE_MARKED_P (ref) = 0;
10932 /* Now see if we have a repeated base type. */
10933 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10935 for (base_binfo = binfo; base_binfo;
10936 base_binfo = TREE_CHAIN (base_binfo))
10938 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10940 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10943 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10945 for (base_binfo = binfo; base_binfo;
10946 base_binfo = TREE_CHAIN (base_binfo))
10947 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10948 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10957 /* Begin compiling the definition of an enumeration type.
10960 UNDERLYING_TYPE is the type that will be used as the storage for
10961 the enumeration type. This should be NULL_TREE if no storage type
10964 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10966 Returns the type object, as yet incomplete.
10967 Also records info about it so that build_enumerator
10968 may be used to declare the individual values as they are read. */
10971 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10975 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10977 /* If this is the real definition for a previous forward reference,
10978 fill in the contents in the same object that used to be the
10979 forward reference. */
10981 enumtype = lookup_and_check_tag (enum_type, name,
10982 /*tag_scope=*/ts_current,
10983 /*template_header_p=*/false);
10985 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10987 error ("multiple definition of %q#T", enumtype);
10988 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10989 /* Clear out TYPE_VALUES, and start again. */
10990 TYPE_VALUES (enumtype) = NULL_TREE;
10994 /* In case of error, make a dummy enum to allow parsing to
10996 if (enumtype == error_mark_node)
10997 name = make_anon_name ();
10999 enumtype = make_node (ENUMERAL_TYPE);
11000 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11003 if (enumtype == error_mark_node)
11008 SET_SCOPED_ENUM_P (enumtype, 1);
11009 begin_scope (sk_scoped_enum, enumtype);
11011 /* [C++0x dcl.enum]p5:
11013 If not explicitly specified, the underlying type of a scoped
11014 enumeration type is int. */
11015 if (!underlying_type)
11016 underlying_type = integer_type_node;
11019 if (underlying_type)
11021 if (CP_INTEGRAL_TYPE_P (underlying_type))
11023 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11024 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11025 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11026 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11027 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11028 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11029 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11030 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11031 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11032 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11035 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11036 underlying_type, enumtype);
11042 /* After processing and defining all the values of an enumeration type,
11043 install their decls in the enumeration type and finish it off.
11044 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11047 finish_enum (tree enumtype)
11056 bool use_short_enum;
11061 tree underlying_type = NULL_TREE;
11062 bool fixed_underlying_type_p
11063 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11065 /* We built up the VALUES in reverse order. */
11066 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11068 /* For an enum defined in a template, just set the type of the values;
11069 all further processing is postponed until the template is
11070 instantiated. We need to set the type so that tsubst of a CONST_DECL
11072 if (processing_template_decl)
11074 for (values = TYPE_VALUES (enumtype);
11076 values = TREE_CHAIN (values))
11077 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11078 if (at_function_scope_p ())
11079 add_stmt (build_min (TAG_DEFN, enumtype));
11083 /* Determine the minimum and maximum values of the enumerators. */
11084 if (TYPE_VALUES (enumtype))
11086 minnode = maxnode = NULL_TREE;
11088 for (values = TYPE_VALUES (enumtype);
11090 values = TREE_CHAIN (values))
11092 decl = TREE_VALUE (values);
11094 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11095 each enumerator has the type of its enumeration. Prior to the
11096 closing brace, the type of each enumerator is the type of its
11097 initializing value. */
11098 TREE_TYPE (decl) = enumtype;
11100 /* Update the minimum and maximum values, if appropriate. */
11101 value = DECL_INITIAL (decl);
11102 if (value == error_mark_node)
11103 value = integer_zero_node;
11104 /* Figure out what the minimum and maximum values of the
11105 enumerators are. */
11107 minnode = maxnode = value;
11108 else if (tree_int_cst_lt (maxnode, value))
11110 else if (tree_int_cst_lt (value, minnode))
11117 If the enumerator-list is empty, the underlying type is as if
11118 the enumeration had a single enumerator with value 0. */
11119 minnode = maxnode = integer_zero_node;
11121 /* Compute the number of bits require to represent all values of the
11122 enumeration. We must do this before the type of MINNODE and
11123 MAXNODE are transformed, since tree_int_cst_min_precision relies
11124 on the TREE_TYPE of the value it is passed. */
11125 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11126 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11127 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11128 precision = MAX (lowprec, highprec);
11130 if (!fixed_underlying_type_p)
11132 /* Determine the underlying type of the enumeration.
11136 The underlying type of an enumeration is an integral type that
11137 can represent all the enumerator values defined in the
11138 enumeration. It is implementation-defined which integral type is
11139 used as the underlying type for an enumeration except that the
11140 underlying type shall not be larger than int unless the value of
11141 an enumerator cannot fit in an int or unsigned int.
11143 We use "int" or an "unsigned int" as the underlying type, even if
11144 a smaller integral type would work, unless the user has
11145 explicitly requested that we use the smallest possible type. The
11146 user can request that for all enumerations with a command line
11147 flag, or for just one enumeration with an attribute. */
11149 use_short_enum = flag_short_enums
11150 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11152 for (itk = (use_short_enum ? itk_char : itk_int);
11156 underlying_type = integer_types[itk];
11157 if (TYPE_PRECISION (underlying_type) >= precision
11158 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11161 if (itk == itk_none)
11165 IF no integral type can represent all the enumerator values, the
11166 enumeration is ill-formed. */
11167 error ("no integral type can represent all of the enumerator values "
11168 "for %qT", enumtype);
11169 precision = TYPE_PRECISION (long_long_integer_type_node);
11170 underlying_type = integer_types[itk_unsigned_long_long];
11175 The value of sizeof() applied to an enumeration type, an object
11176 of an enumeration type, or an enumerator, is the value of sizeof()
11177 applied to the underlying type. */
11178 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11179 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11180 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11181 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11182 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11183 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11185 /* Set the underlying type of the enumeration type to the
11186 computed enumeration type, restricted to the enumerator
11188 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11189 set_min_and_max_values_for_integral_type
11190 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11193 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11195 /* Compute the minimum and maximum values for the type.
11199 For an enumeration where emin is the smallest enumerator and emax
11200 is the largest, the values of the enumeration are the values of the
11201 underlying type in the range bmin to bmax, where bmin and bmax are,
11202 respectively, the smallest and largest values of the smallest bit-
11203 field that can store emin and emax. */
11205 /* The middle-end currently assumes that types with TYPE_PRECISION
11206 narrower than their underlying type are suitably zero or sign
11207 extended to fill their mode. g++ doesn't make these guarantees.
11208 Until the middle-end can represent such paradoxical types, we
11209 set the TYPE_PRECISION to the width of the underlying type. */
11210 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11212 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11214 /* Convert each of the enumerators to the type of the underlying
11215 type of the enumeration. */
11216 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11218 location_t saved_location;
11220 decl = TREE_VALUE (values);
11221 saved_location = input_location;
11222 input_location = DECL_SOURCE_LOCATION (decl);
11223 if (fixed_underlying_type_p)
11224 /* If the enumeration type has a fixed underlying type, we
11225 already checked all of the enumerator values. */
11226 value = DECL_INITIAL (decl);
11228 value = perform_implicit_conversion (underlying_type,
11229 DECL_INITIAL (decl),
11230 tf_warning_or_error);
11231 input_location = saved_location;
11233 /* Do not clobber shared ints. */
11234 value = copy_node (value);
11236 TREE_TYPE (value) = enumtype;
11237 DECL_INITIAL (decl) = value;
11240 /* Fix up all variant types of this enum type. */
11241 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11243 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11244 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11245 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11246 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11247 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11248 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11249 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11250 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11251 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11252 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11253 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11256 /* Finish up the scope of a scoped enumeration. */
11257 if (SCOPED_ENUM_P (enumtype))
11260 /* Finish debugging output for this type. */
11261 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11264 /* Build and install a CONST_DECL for an enumeration constant of the
11265 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11266 Assignment of sequential values by default is handled here. */
11269 build_enumerator (tree name, tree value, tree enumtype)
11275 /* If the VALUE was erroneous, pretend it wasn't there; that will
11276 result in the enum being assigned the next value in sequence. */
11277 if (value == error_mark_node)
11280 /* Remove no-op casts from the value. */
11282 STRIP_TYPE_NOPS (value);
11284 if (! processing_template_decl)
11286 /* Validate and default VALUE. */
11287 if (value != NULL_TREE)
11289 value = integral_constant_value (value);
11291 if (TREE_CODE (value) == INTEGER_CST)
11293 value = perform_integral_promotions (value);
11294 constant_expression_warning (value);
11298 error ("enumerator value for %qD is not an integer constant", name);
11303 /* Default based on previous value. */
11304 if (value == NULL_TREE)
11306 if (TYPE_VALUES (enumtype))
11309 unsigned HOST_WIDE_INT lo;
11313 /* The next value is the previous value plus one.
11314 add_double doesn't know the type of the target expression,
11315 so we must check with int_fits_type_p as well. */
11316 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11317 if (error_operand_p (prev_value))
11318 value = error_mark_node;
11321 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11322 TREE_INT_CST_HIGH (prev_value),
11324 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11326 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11330 error ("overflow in enumeration values at %qD", name);
11331 value = error_mark_node;
11336 value = integer_zero_node;
11339 /* Remove no-op casts from the value. */
11340 STRIP_TYPE_NOPS (value);
11342 /* If the underlying type of the enum is fixed, check whether
11343 the enumerator values fits in the underlying type. If it
11344 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11345 if (ENUM_UNDERLYING_TYPE (enumtype)
11347 && TREE_CODE (value) == INTEGER_CST
11348 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11350 error ("enumerator value %E is too large for underlying type %<%T%>",
11351 value, ENUM_UNDERLYING_TYPE (enumtype));
11353 /* Silently convert the value so that we can continue. */
11354 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11359 /* C++ associates enums with global, function, or class declarations. */
11360 context = current_scope ();
11362 /* Build the actual enumeration constant. Note that the enumeration
11363 constants have the underlying type of the enum (if it is fixed)
11364 or the type of their initializer (if the underlying type of the
11365 enum is not fixed):
11369 If the underlying type is fixed, the type of each enumerator
11370 prior to the closing brace is the underlying type; if the
11371 initializing value of an enumerator cannot be represented by
11372 the underlying type, the program is ill-formed. If the
11373 underlying type is not fixed, the type of each enumerator is
11374 the type of its initializing value.
11376 If the underlying type is not fixed, it will be computed by
11377 finish_enum and we will reset the type of this enumerator. Of
11378 course, if we're processing a template, there may be no value. */
11379 type = value ? TREE_TYPE (value) : NULL_TREE;
11381 if (context && context == current_class_type)
11382 /* This enum declaration is local to the class. We need the full
11383 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11384 decl = build_lang_decl (CONST_DECL, name, type);
11386 /* It's a global enum, or it's local to a function. (Note local to
11387 a function could mean local to a class method. */
11388 decl = build_decl (CONST_DECL, name, type);
11390 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11391 TREE_CONSTANT (decl) = 1;
11392 TREE_READONLY (decl) = 1;
11393 DECL_INITIAL (decl) = value;
11395 if (context && context == current_class_type)
11396 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11397 on the TYPE_FIELDS list for `S'. (That's so that you can say
11398 things like `S::i' later.) */
11399 finish_member_declaration (decl);
11403 /* Add this enumeration constant to the list for this type. */
11404 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11407 /* Look for an enumerator with the given NAME within the enumeration
11408 type ENUMTYPE. This routine is used primarily for qualified name
11409 lookup into an enumerator in C++0x, e.g.,
11411 enum class Color { Red, Green, Blue };
11413 Color color = Color::Red;
11415 Returns the value corresponding to the enumerator, or
11416 NULL_TREE if no such enumerator was found. */
11418 lookup_enumerator (tree enumtype, tree name)
11421 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11423 e = purpose_member (name, TYPE_VALUES (enumtype));
11424 return e? TREE_VALUE (e) : NULL_TREE;
11428 /* We're defining DECL. Make sure that it's type is OK. */
11431 check_function_type (tree decl, tree current_function_parms)
11433 tree fntype = TREE_TYPE (decl);
11434 tree return_type = complete_type (TREE_TYPE (fntype));
11436 /* In a function definition, arg types must be complete. */
11437 require_complete_types_for_parms (current_function_parms);
11439 if (dependent_type_p (return_type))
11441 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11442 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11444 tree args = TYPE_ARG_TYPES (fntype);
11446 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11447 error ("return type %q#T is incomplete", return_type);
11449 error ("return type has Java class type %q#T", return_type);
11451 /* Make it return void instead. */
11452 if (TREE_CODE (fntype) == METHOD_TYPE)
11453 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11455 TREE_CHAIN (args));
11457 fntype = build_function_type (void_type_node, args);
11459 = build_exception_variant (fntype,
11460 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11463 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11466 /* Create the FUNCTION_DECL for a function definition.
11467 DECLSPECS and DECLARATOR are the parts of the declaration;
11468 they describe the function's name and the type it returns,
11469 but twisted together in a fashion that parallels the syntax of C.
11471 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11472 DECLARATOR is really the DECL for the function we are about to
11473 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11474 indicating that the function is an inline defined in-class.
11476 This function creates a binding context for the function body
11477 as well as setting up the FUNCTION_DECL in current_function_decl.
11479 For C++, we must first check whether that datum makes any sense.
11480 For example, "class A local_a(1,2);" means that variable local_a
11481 is an aggregate of type A, which should have a constructor
11482 applied to it with the argument list [1, 2].
11484 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11485 or may be a BLOCK if the function has been defined previously
11486 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11487 error_mark_node if the function has never been defined, or
11488 a BLOCK if the function has been defined somewhere. */
11491 start_preparsed_function (tree decl1, tree attrs, int flags)
11493 tree ctype = NULL_TREE;
11496 int doing_friend = 0;
11497 struct cp_binding_level *bl;
11498 tree current_function_parms;
11499 struct c_fileinfo *finfo
11500 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11501 bool honor_interface;
11503 /* Sanity check. */
11504 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11505 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11507 fntype = TREE_TYPE (decl1);
11508 if (TREE_CODE (fntype) == METHOD_TYPE)
11509 ctype = TYPE_METHOD_BASETYPE (fntype);
11511 /* ISO C++ 11.4/5. A friend function defined in a class is in
11512 the (lexical) scope of the class in which it is defined. */
11513 if (!ctype && DECL_FRIEND_P (decl1))
11515 ctype = DECL_FRIEND_CONTEXT (decl1);
11517 /* CTYPE could be null here if we're dealing with a template;
11518 for example, `inline friend float foo()' inside a template
11519 will have no CTYPE set. */
11520 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11526 if (DECL_DECLARED_INLINE_P (decl1)
11527 && lookup_attribute ("noinline", attrs))
11528 warning (0, "inline function %q+D given attribute noinline", decl1);
11530 /* Handle gnu_inline attribute. */
11531 if (GNU_INLINE_P (decl1))
11533 DECL_EXTERNAL (decl1) = 1;
11534 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11535 DECL_INTERFACE_KNOWN (decl1) = 1;
11536 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11539 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11540 /* This is a constructor, we must ensure that any default args
11541 introduced by this definition are propagated to the clones
11542 now. The clones are used directly in overload resolution. */
11543 adjust_clone_args (decl1);
11545 /* Sometimes we don't notice that a function is a static member, and
11546 build a METHOD_TYPE for it. Fix that up now. */
11547 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11548 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11550 revert_static_member_fn (decl1);
11554 /* Set up current_class_type, and enter the scope of the class, if
11557 push_nested_class (ctype);
11558 else if (DECL_STATIC_FUNCTION_P (decl1))
11559 push_nested_class (DECL_CONTEXT (decl1));
11561 /* Now that we have entered the scope of the class, we must restore
11562 the bindings for any template parameters surrounding DECL1, if it
11563 is an inline member template. (Order is important; consider the
11564 case where a template parameter has the same name as a field of
11565 the class.) It is not until after this point that
11566 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11567 if (flags & SF_INCLASS_INLINE)
11568 maybe_begin_member_template_processing (decl1);
11570 /* Effective C++ rule 15. */
11572 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11573 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11574 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11576 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11577 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11578 if (!DECL_INITIAL (decl1))
11579 DECL_INITIAL (decl1) = error_mark_node;
11581 /* This function exists in static storage.
11582 (This does not mean `static' in the C sense!) */
11583 TREE_STATIC (decl1) = 1;
11585 /* We must call push_template_decl after current_class_type is set
11586 up. (If we are processing inline definitions after exiting a
11587 class scope, current_class_type will be NULL_TREE until set above
11588 by push_nested_class.) */
11589 if (processing_template_decl)
11591 /* FIXME: Handle error_mark_node more gracefully. */
11592 tree newdecl1 = push_template_decl (decl1);
11593 if (newdecl1 != error_mark_node)
11597 /* We are now in the scope of the function being defined. */
11598 current_function_decl = decl1;
11600 /* Save the parm names or decls from this function's declarator
11601 where store_parm_decls will find them. */
11602 current_function_parms = DECL_ARGUMENTS (decl1);
11604 /* Make sure the parameter and return types are reasonable. When
11605 you declare a function, these types can be incomplete, but they
11606 must be complete when you define the function. */
11607 check_function_type (decl1, current_function_parms);
11609 /* Build the return declaration for the function. */
11610 restype = TREE_TYPE (fntype);
11611 if (DECL_RESULT (decl1) == NULL_TREE)
11615 resdecl = build_decl (RESULT_DECL, 0, restype);
11616 DECL_ARTIFICIAL (resdecl) = 1;
11617 DECL_IGNORED_P (resdecl) = 1;
11618 DECL_RESULT (decl1) = resdecl;
11620 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11623 /* Let the user know we're compiling this function. */
11624 announce_function (decl1);
11626 /* Record the decl so that the function name is defined.
11627 If we already have a decl for this name, and it is a FUNCTION_DECL,
11628 use the old decl. */
11629 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11631 /* A specialization is not used to guide overload resolution. */
11632 if (!DECL_FUNCTION_MEMBER_P (decl1)
11633 && !(DECL_USE_TEMPLATE (decl1) &&
11634 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11636 tree olddecl = pushdecl (decl1);
11638 if (olddecl == error_mark_node)
11639 /* If something went wrong when registering the declaration,
11640 use DECL1; we have to have a FUNCTION_DECL to use when
11641 parsing the body of the function. */
11645 /* Otherwise, OLDDECL is either a previous declaration
11646 of the same function or DECL1 itself. */
11648 if (warn_missing_declarations
11649 && olddecl == decl1
11650 && !DECL_MAIN_P (decl1)
11651 && TREE_PUBLIC (decl1)
11652 && !DECL_DECLARED_INLINE_P (decl1))
11656 /* Check whether DECL1 is in an anonymous
11658 for (context = DECL_CONTEXT (decl1);
11660 context = DECL_CONTEXT (context))
11662 if (TREE_CODE (context) == NAMESPACE_DECL
11663 && DECL_NAME (context) == NULL_TREE)
11667 if (context == NULL)
11668 warning (OPT_Wmissing_declarations,
11669 "no previous declaration for %q+D", decl1);
11677 /* We need to set the DECL_CONTEXT. */
11678 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11679 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11681 fntype = TREE_TYPE (decl1);
11683 /* If #pragma weak applies, mark the decl appropriately now.
11684 The pragma only applies to global functions. Because
11685 determining whether or not the #pragma applies involves
11686 computing the mangled name for the declaration, we cannot
11687 apply the pragma until after we have merged this declaration
11688 with any previous declarations; if the original declaration
11689 has a linkage specification, that specification applies to
11690 the definition as well, and may affect the mangled name. */
11691 if (!DECL_CONTEXT (decl1))
11692 maybe_apply_pragma_weak (decl1);
11695 /* Reset this in case the call to pushdecl changed it. */
11696 current_function_decl = decl1;
11698 gcc_assert (DECL_INITIAL (decl1));
11700 /* This function may already have been parsed, in which case just
11701 return; our caller will skip over the body without parsing. */
11702 if (DECL_INITIAL (decl1) != error_mark_node)
11705 /* Initialize RTL machinery. We cannot do this until
11706 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11707 even when processing a template; this is how we get
11708 CFUN set up, and our per-function variables initialized.
11709 FIXME factor out the non-RTL stuff. */
11710 bl = current_binding_level;
11711 allocate_struct_function (decl1, processing_template_decl);
11713 /* Initialize the language data structures. Whenever we start
11714 a new function, we destroy temporaries in the usual way. */
11715 cfun->language = GGC_CNEW (struct language_function);
11716 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11717 current_binding_level = bl;
11719 /* Even though we're inside a function body, we still don't want to
11720 call expand_expr to calculate the size of a variable-sized array.
11721 We haven't necessarily assigned RTL to all variables yet, so it's
11722 not safe to try to expand expressions involving them. */
11723 cfun->dont_save_pending_sizes_p = 1;
11725 /* Start the statement-tree, start the tree now. */
11726 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11728 /* If we are (erroneously) defining a function that we have already
11729 defined before, wipe out what we knew before. */
11730 if (!DECL_PENDING_INLINE_P (decl1))
11731 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11733 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11735 /* We know that this was set up by `grokclassfn'. We do not
11736 wait until `store_parm_decls', since evil parse errors may
11737 never get us to that point. Here we keep the consistency
11738 between `current_class_type' and `current_class_ptr'. */
11739 tree t = DECL_ARGUMENTS (decl1);
11741 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11742 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11744 cp_function_chain->x_current_class_ref
11745 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11746 cp_function_chain->x_current_class_ptr = t;
11748 /* Constructors and destructors need to know whether they're "in
11749 charge" of initializing virtual base classes. */
11750 t = TREE_CHAIN (t);
11751 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11753 current_in_charge_parm = t;
11754 t = TREE_CHAIN (t);
11756 if (DECL_HAS_VTT_PARM_P (decl1))
11758 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11759 current_vtt_parm = t;
11763 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11764 /* Implicitly-defined methods (like the
11765 destructor for a class in which no destructor
11766 is explicitly declared) must not be defined
11767 until their definition is needed. So, we
11768 ignore interface specifications for
11769 compiler-generated functions. */
11770 && !DECL_ARTIFICIAL (decl1));
11772 if (DECL_INTERFACE_KNOWN (decl1))
11774 tree ctx = decl_function_context (decl1);
11776 if (DECL_NOT_REALLY_EXTERN (decl1))
11777 DECL_EXTERNAL (decl1) = 0;
11779 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11780 && TREE_PUBLIC (ctx))
11781 /* This is a function in a local class in an extern inline
11783 comdat_linkage (decl1);
11785 /* If this function belongs to an interface, it is public.
11786 If it belongs to someone else's interface, it is also external.
11787 This only affects inlines and template instantiations. */
11788 else if (!finfo->interface_unknown && honor_interface)
11790 if (DECL_DECLARED_INLINE_P (decl1)
11791 || DECL_TEMPLATE_INSTANTIATION (decl1)
11792 || processing_template_decl)
11794 DECL_EXTERNAL (decl1)
11795 = (finfo->interface_only
11796 || (DECL_DECLARED_INLINE_P (decl1)
11797 && ! flag_implement_inlines
11798 && !DECL_VINDEX (decl1)));
11800 /* For WIN32 we also want to put these in linkonce sections. */
11801 maybe_make_one_only (decl1);
11804 DECL_EXTERNAL (decl1) = 0;
11805 DECL_INTERFACE_KNOWN (decl1) = 1;
11806 /* If this function is in an interface implemented in this file,
11807 make sure that the back end knows to emit this function
11809 if (!DECL_EXTERNAL (decl1))
11810 mark_needed (decl1);
11812 else if (finfo->interface_unknown && finfo->interface_only
11813 && honor_interface)
11815 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11816 interface, we will have both finfo->interface_unknown and
11817 finfo->interface_only set. In that case, we don't want to
11818 use the normal heuristics because someone will supply a
11819 #pragma implementation elsewhere, and deducing it here would
11820 produce a conflict. */
11821 comdat_linkage (decl1);
11822 DECL_EXTERNAL (decl1) = 0;
11823 DECL_INTERFACE_KNOWN (decl1) = 1;
11824 DECL_DEFER_OUTPUT (decl1) = 1;
11828 /* This is a definition, not a reference.
11829 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11830 if (!GNU_INLINE_P (decl1))
11831 DECL_EXTERNAL (decl1) = 0;
11833 if ((DECL_DECLARED_INLINE_P (decl1)
11834 || DECL_TEMPLATE_INSTANTIATION (decl1))
11835 && ! DECL_INTERFACE_KNOWN (decl1)
11836 /* Don't try to defer nested functions for now. */
11837 && ! decl_function_context (decl1))
11838 DECL_DEFER_OUTPUT (decl1) = 1;
11840 DECL_INTERFACE_KNOWN (decl1) = 1;
11843 /* Determine the ELF visibility attribute for the function. We must not
11844 do this before calling "pushdecl", as we must allow "duplicate_decls"
11845 to merge any attributes appropriately. We also need to wait until
11847 if (!DECL_CLONED_FUNCTION_P (decl1))
11848 determine_visibility (decl1);
11850 begin_scope (sk_function_parms, decl1);
11854 if (DECL_DESTRUCTOR_P (decl1)
11855 || (DECL_CONSTRUCTOR_P (decl1)
11856 && targetm.cxx.cdtor_returns_this ()))
11858 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
11859 DECL_CONTEXT (cdtor_label) = current_function_decl;
11862 start_fname_decls ();
11864 store_parm_decls (current_function_parms);
11868 /* Like start_preparsed_function, except that instead of a
11869 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11871 Returns 1 on success. If the DECLARATOR is not suitable for a function
11872 (it defines a datum instead), we return 0, which tells
11873 yyparse to report a parse error. */
11876 start_function (cp_decl_specifier_seq *declspecs,
11877 const cp_declarator *declarator,
11882 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11883 if (decl1 == error_mark_node)
11885 /* If the declarator is not suitable for a function definition,
11886 cause a syntax error. */
11887 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11889 error ("invalid function declaration");
11893 if (DECL_MAIN_P (decl1))
11894 /* main must return int. grokfndecl should have corrected it
11895 (and issued a diagnostic) if the user got it wrong. */
11896 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11897 integer_type_node));
11899 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11904 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11908 use_eh_spec_block (tree fn)
11910 return (flag_exceptions && flag_enforce_eh_specs
11911 && !processing_template_decl
11912 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11913 /* We insert the EH_SPEC_BLOCK only in the original
11914 function; then, it is copied automatically to the
11916 && !DECL_CLONED_FUNCTION_P (fn)
11917 /* Implicitly-generated constructors and destructors have
11918 exception specifications. However, those specifications
11919 are the union of the possible exceptions specified by the
11920 constructors/destructors for bases and members, so no
11921 unallowed exception will ever reach this function. By
11922 not creating the EH_SPEC_BLOCK we save a little memory,
11923 and we avoid spurious warnings about unreachable
11925 && !DECL_ARTIFICIAL (fn));
11928 /* Store the parameter declarations into the current function declaration.
11929 This is called after parsing the parameter declarations, before
11930 digesting the body of the function.
11932 Also install to binding contour return value identifier, if any. */
11935 store_parm_decls (tree current_function_parms)
11937 tree fndecl = current_function_decl;
11940 /* This is a chain of any other decls that came in among the parm
11941 declarations. If a parm is declared with enum {foo, bar} x;
11942 then CONST_DECLs for foo and bar are put here. */
11943 tree nonparms = NULL_TREE;
11945 if (current_function_parms)
11947 /* This case is when the function was defined with an ANSI prototype.
11948 The parms already have decls, so we need not do anything here
11949 except record them as in effect
11950 and complain if any redundant old-style parm decls were written. */
11952 tree specparms = current_function_parms;
11955 /* Must clear this because it might contain TYPE_DECLs declared
11957 current_binding_level->names = NULL;
11959 /* If we're doing semantic analysis, then we'll call pushdecl
11960 for each of these. We must do them in reverse order so that
11961 they end in the correct forward order. */
11962 specparms = nreverse (specparms);
11964 for (parm = specparms; parm; parm = next)
11966 next = TREE_CHAIN (parm);
11967 if (TREE_CODE (parm) == PARM_DECL)
11969 if (DECL_NAME (parm) == NULL_TREE
11970 || TREE_CODE (parm) != VOID_TYPE)
11973 error ("parameter %qD declared void", parm);
11977 /* If we find an enum constant or a type tag,
11978 put it aside for the moment. */
11979 TREE_CHAIN (parm) = NULL_TREE;
11980 nonparms = chainon (nonparms, parm);
11984 /* Get the decls in their original chain order and record in the
11985 function. This is all and only the PARM_DECLs that were
11986 pushed into scope by the loop above. */
11987 DECL_ARGUMENTS (fndecl) = getdecls ();
11990 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11992 /* Now store the final chain of decls for the arguments
11993 as the decl-chain of the current lexical scope.
11994 Put the enumerators in as well, at the front so that
11995 DECL_ARGUMENTS is not modified. */
11996 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11998 if (use_eh_spec_block (current_function_decl))
11999 current_eh_spec_block = begin_eh_spec_block ();
12003 /* We have finished doing semantic analysis on DECL, but have not yet
12004 generated RTL for its body. Save away our current state, so that
12005 when we want to generate RTL later we know what to do. */
12008 save_function_data (tree decl)
12010 struct language_function *f;
12012 /* Save the language-specific per-function data so that we can
12013 get it back when we really expand this function. */
12014 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12017 f = GGC_NEW (struct language_function);
12018 memcpy (f, cp_function_chain, sizeof (struct language_function));
12019 DECL_SAVED_FUNCTION_DATA (decl) = f;
12021 /* Clear out the bits we don't need. */
12022 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12023 f->bindings = NULL;
12024 f->x_local_names = NULL;
12028 /* Set the return value of the constructor (if present). */
12031 finish_constructor_body (void)
12036 if (targetm.cxx.cdtor_returns_this ()
12037 && (! TYPE_FOR_JAVA (current_class_type)))
12039 /* Any return from a constructor will end up here. */
12040 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12042 val = DECL_ARGUMENTS (current_function_decl);
12043 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12044 DECL_RESULT (current_function_decl), val);
12045 /* Return the address of the object. */
12046 exprstmt = build_stmt (RETURN_EXPR, val);
12047 add_stmt (exprstmt);
12051 /* Do all the processing for the beginning of a destructor; set up the
12052 vtable pointers and cleanups for bases and members. */
12055 begin_destructor_body (void)
12057 tree compound_stmt;
12059 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12060 issued an error message. We still want to try to process the
12061 body of the function, but initialize_vtbl_ptrs will crash if
12062 TYPE_BINFO is NULL. */
12063 if (COMPLETE_TYPE_P (current_class_type))
12065 compound_stmt = begin_compound_stmt (0);
12066 /* Make all virtual function table pointers in non-virtual base
12067 classes point to CURRENT_CLASS_TYPE's virtual function
12069 initialize_vtbl_ptrs (current_class_ptr);
12070 finish_compound_stmt (compound_stmt);
12072 /* And insert cleanups for our bases and members so that they
12073 will be properly destroyed if we throw. */
12074 push_base_cleanups ();
12078 /* At the end of every destructor we generate code to delete the object if
12079 necessary. Do that now. */
12082 finish_destructor_body (void)
12086 /* Any return from a destructor will end up here; that way all base
12087 and member cleanups will be run when the function returns. */
12088 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12090 /* In a virtual destructor, we must call delete. */
12091 if (DECL_VIRTUAL_P (current_function_decl))
12094 tree virtual_size = cxx_sizeof (current_class_type);
12098 At the point of definition of a virtual destructor (including
12099 an implicit definition), non-placement operator delete shall
12100 be looked up in the scope of the destructor's class and if
12101 found shall be accessible and unambiguous. */
12102 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12104 /*global_p=*/false,
12105 /*placement=*/NULL_TREE,
12106 /*alloc_fn=*/NULL_TREE);
12108 if_stmt = begin_if_stmt ();
12109 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12110 current_in_charge_parm,
12113 finish_expr_stmt (exprstmt);
12114 finish_then_clause (if_stmt);
12115 finish_if_stmt (if_stmt);
12118 if (targetm.cxx.cdtor_returns_this ())
12122 val = DECL_ARGUMENTS (current_function_decl);
12123 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12124 DECL_RESULT (current_function_decl), val);
12125 /* Return the address of the object. */
12126 exprstmt = build_stmt (RETURN_EXPR, val);
12127 add_stmt (exprstmt);
12131 /* Do the necessary processing for the beginning of a function body, which
12132 in this case includes member-initializers, but not the catch clauses of
12133 a function-try-block. Currently, this means opening a binding level
12134 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12137 begin_function_body (void)
12141 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12144 if (processing_template_decl)
12145 /* Do nothing now. */;
12147 /* Always keep the BLOCK node associated with the outermost pair of
12148 curly braces of a function. These are needed for correct
12149 operation of dwarfout.c. */
12150 keep_next_level (true);
12152 stmt = begin_compound_stmt (BCS_FN_BODY);
12154 if (processing_template_decl)
12155 /* Do nothing now. */;
12156 else if (DECL_DESTRUCTOR_P (current_function_decl))
12157 begin_destructor_body ();
12162 /* Do the processing for the end of a function body. Currently, this means
12163 closing out the cleanups for fully-constructed bases and members, and in
12164 the case of the destructor, deleting the object if desired. Again, this
12165 is only meaningful for [cd]tors, since they are the only functions where
12166 there is a significant distinction between the main body and any
12167 function catch clauses. Handling, say, main() return semantics here
12168 would be wrong, as flowing off the end of a function catch clause for
12169 main() would also need to return 0. */
12172 finish_function_body (tree compstmt)
12174 if (compstmt == NULL_TREE)
12177 /* Close the block. */
12178 finish_compound_stmt (compstmt);
12180 if (processing_template_decl)
12181 /* Do nothing now. */;
12182 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12183 finish_constructor_body ();
12184 else if (DECL_DESTRUCTOR_P (current_function_decl))
12185 finish_destructor_body ();
12188 /* Given a function, returns the BLOCK corresponding to the outermost level
12189 of curly braces, skipping the artificial block created for constructor
12193 outer_curly_brace_block (tree fndecl)
12195 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12196 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12197 /* Skip the artificial function body block. */
12198 block = BLOCK_SUBBLOCKS (block);
12202 /* Finish up a function declaration and compile that function
12203 all the way to assembler language output. The free the storage
12204 for the function definition.
12206 FLAGS is a bitwise or of the following values:
12208 We just finished processing the body of an in-class inline
12209 function definition. (This processing will have taken place
12210 after the class definition is complete.) */
12213 finish_function (int flags)
12215 tree fndecl = current_function_decl;
12216 tree fntype, ctype = NULL_TREE;
12217 int inclass_inline = (flags & 2) != 0;
12220 /* When we get some parse errors, we can end up without a
12221 current_function_decl, so cope. */
12222 if (fndecl == NULL_TREE)
12223 return error_mark_node;
12225 gcc_assert (!defer_mark_used_calls);
12226 defer_mark_used_calls = true;
12228 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12229 && DECL_VIRTUAL_P (fndecl)
12230 && !processing_template_decl)
12232 tree fnclass = DECL_CONTEXT (fndecl);
12233 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12234 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12237 nested = function_depth > 1;
12238 fntype = TREE_TYPE (fndecl);
12240 /* TREE_READONLY (fndecl) = 1;
12241 This caused &foo to be of type ptr-to-const-function
12242 which then got a warning when stored in a ptr-to-function variable. */
12244 gcc_assert (building_stmt_tree ());
12245 /* The current function is being defined, so its DECL_INITIAL should
12246 be set, and unless there's a multiple definition, it should be
12247 error_mark_node. */
12248 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12250 /* For a cloned function, we've already got all the code we need;
12251 there's no need to add any extra bits. */
12252 if (!DECL_CLONED_FUNCTION_P (fndecl))
12254 if (DECL_MAIN_P (current_function_decl))
12258 /* Make it so that `main' always returns 0 by default (or
12261 stmt = finish_return_stmt (integer_one_node);
12263 stmt = finish_return_stmt (integer_zero_node);
12265 /* Hack. We don't want the middle-end to warn that this
12266 return is unreachable, so put the statement on the
12269 location_t linezero = linemap_line_start (line_table, 0, 1);
12270 SET_EXPR_LOCATION (stmt, linezero);
12274 if (use_eh_spec_block (current_function_decl))
12275 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12276 (TREE_TYPE (current_function_decl)),
12277 current_eh_spec_block);
12280 /* If we're saving up tree structure, tie off the function now. */
12281 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12283 finish_fname_decls ();
12285 /* If this function can't throw any exceptions, remember that. */
12286 if (!processing_template_decl
12287 && !cp_function_chain->can_throw
12288 && !flag_non_call_exceptions
12289 && !DECL_REPLACEABLE_P (fndecl))
12290 TREE_NOTHROW (fndecl) = 1;
12292 /* This must come after expand_function_end because cleanups might
12293 have declarations (from inline functions) that need to go into
12294 this function's blocks. */
12296 /* If the current binding level isn't the outermost binding level
12297 for this function, either there is a bug, or we have experienced
12298 syntax errors and the statement tree is malformed. */
12299 if (current_binding_level->kind != sk_function_parms)
12301 /* Make sure we have already experienced errors. */
12302 gcc_assert (errorcount);
12304 /* Throw away the broken statement tree and extra binding
12306 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12308 while (current_binding_level->kind != sk_function_parms)
12310 if (current_binding_level->kind == sk_class)
12311 pop_nested_class ();
12313 poplevel (0, 0, 0);
12316 poplevel (1, 0, 1);
12318 /* Statements should always be full-expressions at the outermost set
12319 of curly braces for a function. */
12320 gcc_assert (stmts_are_full_exprs_p ());
12322 /* Set up the named return value optimization, if we can. Candidate
12323 variables are selected in check_return_expr. */
12324 if (current_function_return_value)
12326 tree r = current_function_return_value;
12329 if (r != error_mark_node
12330 /* This is only worth doing for fns that return in memory--and
12331 simpler, since we don't have to worry about promoted modes. */
12332 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12333 /* Only allow this for variables declared in the outer scope of
12334 the function so we know that their lifetime always ends with a
12335 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12336 we were to do this optimization in tree-ssa. */
12337 && (outer = outer_curly_brace_block (fndecl))
12338 && chain_member (r, BLOCK_VARS (outer)))
12339 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12341 current_function_return_value = NULL_TREE;
12344 /* Remember that we were in class scope. */
12345 if (current_class_name)
12346 ctype = current_class_type;
12348 /* Must mark the RESULT_DECL as being in this function. */
12349 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12351 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12352 to the FUNCTION_DECL node itself. */
12353 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12355 /* Save away current state, if appropriate. */
12356 if (!processing_template_decl)
12357 save_function_data (fndecl);
12359 /* Complain if there's just no return statement. */
12360 if (warn_return_type
12361 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12362 && !dependent_type_p (TREE_TYPE (fntype))
12363 && !current_function_returns_value && !current_function_returns_null
12364 /* Don't complain if we abort or throw. */
12365 && !current_function_returns_abnormally
12366 && !DECL_NAME (DECL_RESULT (fndecl))
12367 && !TREE_NO_WARNING (fndecl)
12368 /* Structor return values (if any) are set by the compiler. */
12369 && !DECL_CONSTRUCTOR_P (fndecl)
12370 && !DECL_DESTRUCTOR_P (fndecl))
12372 warning (OPT_Wreturn_type,
12373 "no return statement in function returning non-void");
12374 TREE_NO_WARNING (fndecl) = 1;
12377 /* Store the end of the function, so that we get good line number
12378 info for the epilogue. */
12379 cfun->function_end_locus = input_location;
12381 /* Genericize before inlining. */
12382 if (!processing_template_decl)
12384 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12385 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12386 cp_genericize (fndecl);
12387 /* Clear out the bits we don't need. */
12388 f->x_current_class_ptr = NULL;
12389 f->x_current_class_ref = NULL;
12390 f->x_eh_spec_block = NULL;
12391 f->x_in_charge_parm = NULL;
12392 f->x_vtt_parm = NULL;
12393 f->x_return_value = NULL;
12394 f->bindings = NULL;
12395 f->extern_decl_map = NULL;
12397 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12398 c_warn_unused_result (gimple_body (fndecl));
12400 /* Clear out the bits we don't need. */
12401 local_names = NULL;
12403 /* We're leaving the context of this function, so zap cfun. It's still in
12404 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12406 current_function_decl = NULL;
12408 /* If this is an in-class inline definition, we may have to pop the
12409 bindings for the template parameters that we added in
12410 maybe_begin_member_template_processing when start_function was
12412 if (inclass_inline)
12413 maybe_end_member_template_processing ();
12415 /* Leave the scope of the class. */
12417 pop_nested_class ();
12423 /* Let the error reporting routines know that we're outside a
12424 function. For a nested function, this value is used in
12425 cxx_pop_function_context and then reset via pop_function_context. */
12426 current_function_decl = NULL_TREE;
12428 defer_mark_used_calls = false;
12429 if (deferred_mark_used_calls)
12434 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12436 VEC_free (tree, gc, deferred_mark_used_calls);
12442 /* Create the FUNCTION_DECL for a function definition.
12443 DECLSPECS and DECLARATOR are the parts of the declaration;
12444 they describe the return type and the name of the function,
12445 but twisted together in a fashion that parallels the syntax of C.
12447 This function creates a binding context for the function body
12448 as well as setting up the FUNCTION_DECL in current_function_decl.
12450 Returns a FUNCTION_DECL on success.
12452 If the DECLARATOR is not suitable for a function (it defines a datum
12453 instead), we return 0, which tells yyparse to report a parse error.
12455 May return void_type_node indicating that this method is actually
12456 a friend. See grokfield for more details.
12458 Came here with a `.pushlevel' .
12460 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12461 CHANGES TO CODE IN `grokfield'. */
12464 start_method (cp_decl_specifier_seq *declspecs,
12465 const cp_declarator *declarator, tree attrlist)
12467 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12470 if (fndecl == error_mark_node)
12471 return error_mark_node;
12473 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12475 error ("invalid member function declaration");
12476 return error_mark_node;
12480 cplus_decl_attributes (&fndecl, attrlist, 0);
12482 /* Pass friends other than inline friend functions back. */
12483 if (fndecl == void_type_node)
12486 if (DECL_IN_AGGR_P (fndecl))
12488 if (DECL_CONTEXT (fndecl)
12489 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12490 error ("%qD is already defined in class %qT", fndecl,
12491 DECL_CONTEXT (fndecl));
12492 return error_mark_node;
12495 check_template_shadow (fndecl);
12497 DECL_DECLARED_INLINE_P (fndecl) = 1;
12498 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12500 /* We process method specializations in finish_struct_1. */
12501 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12503 fndecl = push_template_decl (fndecl);
12504 if (fndecl == error_mark_node)
12508 if (! DECL_FRIEND_P (fndecl))
12510 if (TREE_CHAIN (fndecl))
12512 fndecl = copy_node (fndecl);
12513 TREE_CHAIN (fndecl) = NULL_TREE;
12517 finish_decl (fndecl, NULL_TREE, NULL_TREE, NULL_TREE);
12519 /* Make a place for the parms. */
12520 begin_scope (sk_function_parms, fndecl);
12522 DECL_IN_AGGR_P (fndecl) = 1;
12526 /* Go through the motions of finishing a function definition.
12527 We don't compile this method until after the whole class has
12530 FINISH_METHOD must return something that looks as though it
12531 came from GROKFIELD (since we are defining a method, after all).
12533 This is called after parsing the body of the function definition.
12534 STMTS is the chain of statements that makes up the function body.
12536 DECL is the ..._DECL that `start_method' provided. */
12539 finish_method (tree decl)
12541 tree fndecl = decl;
12546 if (decl == void_type_node)
12549 old_initial = DECL_INITIAL (fndecl);
12551 /* Undo the level for the parms (from start_method).
12552 This is like poplevel, but it causes nothing to be
12553 saved. Saving information here confuses symbol-table
12554 output routines. Besides, this information will
12555 be correctly output when this method is actually
12558 /* Clear out the meanings of the local variables of this level;
12559 also record in each decl which block it belongs to. */
12561 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12563 if (DECL_NAME (link) != NULL_TREE)
12564 pop_binding (DECL_NAME (link), link);
12565 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12566 DECL_CONTEXT (link) = NULL_TREE;
12569 poplevel (0, 0, 0);
12571 DECL_INITIAL (fndecl) = old_initial;
12573 /* We used to check if the context of FNDECL was different from
12574 current_class_type as another way to get inside here. This didn't work
12575 for String.cc in libg++. */
12576 if (DECL_FRIEND_P (fndecl))
12578 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12580 decl = void_type_node;
12587 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12588 we can lay it out later, when and if its type becomes complete. */
12591 maybe_register_incomplete_var (tree var)
12593 gcc_assert (TREE_CODE (var) == VAR_DECL);
12595 /* Keep track of variables with incomplete types. */
12596 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12597 && DECL_EXTERNAL (var))
12599 tree inner_type = TREE_TYPE (var);
12601 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12602 inner_type = TREE_TYPE (inner_type);
12603 inner_type = TYPE_MAIN_VARIANT (inner_type);
12605 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12606 /* RTTI TD entries are created while defining the type_info. */
12607 || (TYPE_LANG_SPECIFIC (inner_type)
12608 && TYPE_BEING_DEFINED (inner_type)))
12609 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12613 /* Called when a class type (given by TYPE) is defined. If there are
12614 any existing VAR_DECLs whose type has been completed by this
12615 declaration, update them now. */
12618 complete_vars (tree type)
12620 tree *list = &incomplete_vars;
12622 gcc_assert (CLASS_TYPE_P (type));
12625 if (same_type_p (type, TREE_PURPOSE (*list)))
12627 tree var = TREE_VALUE (*list);
12628 tree type = TREE_TYPE (var);
12629 /* Complete the type of the variable. The VAR_DECL itself
12630 will be laid out in expand_expr. */
12631 complete_type (type);
12632 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12633 /* Remove this entry from the list. */
12634 *list = TREE_CHAIN (*list);
12637 list = &TREE_CHAIN (*list);
12640 /* Check for pending declarations which may have abstract type. */
12641 complete_type_check_abstract (type);
12644 /* If DECL is of a type which needs a cleanup, build and return an
12645 expression to perform that cleanup here. Return NULL_TREE if no
12646 cleanup need be done. */
12649 cxx_maybe_build_cleanup (tree decl)
12655 /* Assume no cleanup is required. */
12656 cleanup = NULL_TREE;
12658 if (error_operand_p (decl))
12661 /* Handle "__attribute__((cleanup))". We run the cleanup function
12662 before the destructor since the destructor is what actually
12663 terminates the lifetime of the object. */
12664 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12671 /* Get the name specified by the user for the cleanup function. */
12672 id = TREE_VALUE (TREE_VALUE (attr));
12673 /* Look up the name to find the cleanup function to call. It is
12674 important to use lookup_name here because that is what is
12675 used in c-common.c:handle_cleanup_attribute when performing
12676 initial checks on the attribute. Note that those checks
12677 include ensuring that the function found is not an overloaded
12678 function, or an object with an overloaded call operator,
12679 etc.; we can rely on the fact that the function found is an
12680 ordinary FUNCTION_DECL. */
12681 fn = lookup_name (id);
12682 arg = build_address (decl);
12684 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12686 tf_warning_or_error);
12688 /* Handle ordinary C++ destructors. */
12689 type = TREE_TYPE (decl);
12690 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12692 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12693 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12694 && CLASSTYPE_VBASECLASSES (type));
12698 if (TREE_CODE (type) == ARRAY_TYPE)
12701 addr = build_address (decl);
12703 /* Optimize for space over speed here. */
12704 if (!has_vbases || flag_expensive_optimizations)
12705 flags |= LOOKUP_NONVIRTUAL;
12707 call = build_delete (TREE_TYPE (addr), addr,
12708 sfk_complete_destructor, flags, 0);
12710 cleanup = build_compound_expr (cleanup, call);
12718 /* When a stmt has been parsed, this function is called. */
12725 /* DECL was originally constructed as a non-static member function,
12726 but turned out to be static. Update it accordingly. */
12729 revert_static_member_fn (tree decl)
12732 tree function = TREE_TYPE (decl);
12733 tree args = TYPE_ARG_TYPES (function);
12735 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12736 != TYPE_UNQUALIFIED)
12737 error ("static member function %q#D declared with type qualifiers", decl);
12739 args = TREE_CHAIN (args);
12740 tmp = build_function_type (TREE_TYPE (function), args);
12741 tmp = build_qualified_type (tmp, cp_type_quals (function));
12742 tmp = build_exception_variant (tmp,
12743 TYPE_RAISES_EXCEPTIONS (function));
12744 TREE_TYPE (decl) = tmp;
12745 if (DECL_ARGUMENTS (decl))
12746 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12747 DECL_STATIC_FUNCTION_P (decl) = 1;
12750 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12751 one of the language-independent trees. */
12753 enum cp_tree_node_structure_enum
12754 cp_tree_node_structure (union lang_tree_node * t)
12756 switch (TREE_CODE (&t->generic))
12758 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12759 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12760 case OVERLOAD: return TS_CP_OVERLOAD;
12761 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12762 case PTRMEM_CST: return TS_CP_PTRMEM;
12763 case BASELINK: return TS_CP_BASELINK;
12764 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12765 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12766 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12767 default: return TS_CP_GENERIC;
12771 /* Build the void_list_node (void_type_node having been created). */
12773 build_void_list_node (void)
12775 tree t = build_tree_list (NULL_TREE, void_type_node);
12780 cp_missing_noreturn_ok_p (tree decl)
12782 /* A missing noreturn is ok for the `main' function. */
12783 return DECL_MAIN_P (decl);
12786 /* Return the COMDAT group into which DECL should be placed. */
12789 cxx_comdat_group (tree decl)
12793 /* Virtual tables, construction virtual tables, and virtual table
12794 tables all go in a single COMDAT group, named after the primary
12796 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12797 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12798 /* For all other DECLs, the COMDAT group is the mangled name of the
12799 declaration itself. */
12802 while (DECL_THUNK_P (decl))
12804 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12805 into the same section as the target function. In that case
12806 we must return target's name. */
12807 tree target = THUNK_TARGET (decl);
12808 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12809 && DECL_SECTION_NAME (target) != NULL
12810 && DECL_ONE_ONLY (target))
12815 name = DECL_ASSEMBLER_NAME (decl);
12818 return IDENTIFIER_POINTER (name);
12821 #include "gt-cp-decl.h"