1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 #ifdef NO_IMPLICIT_EXTERN_C
936 /* A new declaration doesn't match a built-in one unless it
937 is also extern "C". */
938 if (DECL_BUILT_IN (olddecl)
939 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1063 permerror (input_location, "previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1117 unsigned olddecl_uid = DECL_UID (olddecl);
1118 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1119 int new_defines_function = 0;
1120 tree new_template_info;
1122 if (newdecl == olddecl)
1125 types_match = decls_match (newdecl, olddecl);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl) == error_mark_node
1133 || TREE_TYPE (olddecl) == error_mark_node)
1134 return error_mark_node;
1136 if (DECL_P (olddecl)
1137 && TREE_CODE (newdecl) == FUNCTION_DECL
1138 && TREE_CODE (olddecl) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1141 if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (newdecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl)
1150 && DECL_UNINLINABLE (olddecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl);
1158 else if (DECL_DECLARED_INLINE_P (olddecl)
1159 && DECL_UNINLINABLE (newdecl)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1162 warning (OPT_Wattributes, "function %q+D redeclared with "
1163 "attribute noinline", newdecl);
1164 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1174 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl))
1186 warning (OPT_Wshadow, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1216 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1221 else if (TREE_VALUE (t2) == fileptr_type_node)
1223 tree t = TREE_VALUE (t1);
1225 if (TREE_CODE (t) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1231 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1235 types_match = decls_match (newdecl, olddecl);
1237 return duplicate_decls (newdecl, olddecl,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1242 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1245 else if ((DECL_EXTERN_C_P (newdecl)
1246 && DECL_EXTERN_C_P (olddecl))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl))
1254 warning (0, "new declaration %q#D", newdecl);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl, olddecl);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl))
1275 tree type = TREE_TYPE (newdecl);
1276 tree attribs = (*targetm.merge_type_attributes)
1277 (TREE_TYPE (olddecl), type);
1279 type = cp_build_type_attribute_variant (type, attribs);
1280 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl)
1287 && TREE_NOTHROW (newdecl)
1288 && !TREE_NOTHROW (olddecl)
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1292 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl) = 0;
1298 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl) = 1;
1303 TREE_PUBLIC (olddecl) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1309 COPY_DECL_RTL (newdecl, olddecl);
1312 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1321 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1324 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1325 && TREE_CODE (newdecl) != TYPE_DECL)
1326 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1327 && TREE_CODE (olddecl) != TYPE_DECL))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1339 || (TREE_CODE (olddecl) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl);
1345 if (TREE_CODE (olddecl) == TREE_LIST)
1346 olddecl = TREE_VALUE (olddecl);
1347 error ("previous declaration of %q+#D", olddecl);
1349 return error_mark_node;
1351 else if (!types_match)
1353 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1366 error ("declaration of template %q#D", newdecl);
1367 error ("conflicts with previous declaration %q+#D", olddecl);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1374 DECL_TEMPLATE_PARMS (olddecl))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1378 TREE_TYPE (TREE_TYPE (olddecl))))
1380 error ("new declaration %q#D", newdecl);
1381 error ("ambiguates old declaration %q+#D", olddecl);
1385 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1387 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1396 error ("new declaration %q#D", newdecl);
1397 error ("ambiguates old declaration %q+#D", olddecl);
1398 return error_mark_node;
1405 error ("conflicting declaration %q#D", newdecl);
1406 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1407 return error_mark_node;
1410 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1412 && (!DECL_TEMPLATE_INFO (newdecl)
1413 || (DECL_TI_TEMPLATE (newdecl)
1414 != DECL_TI_TEMPLATE (olddecl))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1416 && (!DECL_TEMPLATE_INFO (olddecl)
1417 || (DECL_TI_TEMPLATE (olddecl)
1418 != DECL_TI_TEMPLATE (newdecl))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1430 && !DECL_USE_TEMPLATE (newdecl))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1432 && !DECL_USE_TEMPLATE (olddecl))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl)
1448 && (DECL_NAMESPACE_ALIAS (newdecl)
1449 == DECL_NAMESPACE_ALIAS (olddecl)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl);
1459 error ("previous declaration of namespace %q+D here", olddecl);
1460 return error_mark_node;
1464 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1467 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1468 if (DECL_NAME (olddecl) != NULL_TREE)
1469 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl);
1472 return error_mark_node;
1474 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1481 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1482 "follows non-prototype definition here");
1484 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1485 || TREE_CODE (olddecl) == VAR_DECL)
1486 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1489 If two declarations of the same function or object
1490 specify different linkage-specifications ..., the program
1491 is ill-formed.... Except for functions with C++ linkage,
1492 a function declaration without a linkage specification
1493 shall not precede the first linkage specification for
1494 that function. A function can be declared without a
1495 linkage specification after an explicit linkage
1496 specification has been seen; the linkage explicitly
1497 specified in the earlier declaration is not affected by
1498 such a function declaration.
1500 DR 563 raises the question why the restrictions on
1501 functions should not also apply to objects. Older
1502 versions of G++ silently ignore the linkage-specification
1510 which is clearly wrong. Therefore, we now treat objects
1512 if (current_lang_depth () == 0)
1514 /* There is no explicit linkage-specification, so we use
1515 the linkage from the previous declaration. */
1516 if (!DECL_LANG_SPECIFIC (newdecl))
1517 retrofit_lang_decl (newdecl);
1518 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1522 error ("previous declaration of %q+#D with %qL linkage",
1523 olddecl, DECL_LANGUAGE (olddecl));
1524 error ("conflicts with new declaration with %qL linkage",
1525 DECL_LANGUAGE (newdecl));
1529 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1531 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1533 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1534 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1537 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1538 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1540 for (; t1 && t1 != void_list_node;
1541 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1542 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1544 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1547 permerror (input_location, "default argument given for parameter %d of %q#D",
1549 permerror (input_location, "after previous specification in %q+#D", olddecl);
1553 error ("default argument given for parameter %d of %q#D",
1555 error ("after previous specification in %q+#D",
1562 /* Do not merge an implicit typedef with an explicit one. In:
1566 typedef class A A __attribute__ ((foo));
1568 the attribute should apply only to the typedef. */
1569 if (TREE_CODE (olddecl) == TYPE_DECL
1570 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1571 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1574 /* If new decl is `static' and an `extern' was seen previously,
1576 warn_extern_redeclared_static (newdecl, olddecl);
1578 /* We have committed to returning 1 at this point. */
1579 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1581 /* Now that functions must hold information normally held
1582 by field decls, there is extra work to do so that
1583 declaration information does not get destroyed during
1585 if (DECL_VINDEX (olddecl))
1586 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1587 if (DECL_CONTEXT (olddecl))
1588 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1589 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1590 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1591 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1592 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1593 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1594 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1595 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1596 SET_OVERLOADED_OPERATOR_CODE
1597 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1598 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1600 /* Optionally warn about more than one declaration for the same
1601 name, but don't warn about a function declaration followed by a
1603 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1604 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1605 /* Don't warn about extern decl followed by definition. */
1606 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1607 /* Don't warn about friends, let add_friend take care of it. */
1608 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1610 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1611 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1614 if (DECL_DELETED_FN (newdecl))
1616 error ("deleted definition of %qD", newdecl);
1617 error ("after previous declaration %q+D", olddecl);
1621 /* Deal with C++: must preserve virtual function table size. */
1622 if (TREE_CODE (olddecl) == TYPE_DECL)
1624 tree newtype = TREE_TYPE (newdecl);
1625 tree oldtype = TREE_TYPE (olddecl);
1627 if (newtype != error_mark_node && oldtype != error_mark_node
1628 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1629 CLASSTYPE_FRIEND_CLASSES (newtype)
1630 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1632 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1635 /* Copy all the DECL_... slots specified in the new decl
1636 except for any that we copy here from the old type. */
1637 DECL_ATTRIBUTES (newdecl)
1638 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1640 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1644 old_result = DECL_TEMPLATE_RESULT (olddecl);
1645 new_result = DECL_TEMPLATE_RESULT (newdecl);
1646 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1647 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1648 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1649 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1651 DECL_ATTRIBUTES (old_result)
1652 = (*targetm.merge_decl_attributes) (old_result, new_result);
1654 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1656 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1657 && DECL_INITIAL (new_result))
1659 if (DECL_INITIAL (old_result))
1660 DECL_UNINLINABLE (old_result) = 1;
1662 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1663 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1664 DECL_NOT_REALLY_EXTERN (old_result)
1665 = DECL_NOT_REALLY_EXTERN (new_result);
1666 DECL_INTERFACE_KNOWN (old_result)
1667 = DECL_INTERFACE_KNOWN (new_result);
1668 DECL_DECLARED_INLINE_P (old_result)
1669 = DECL_DECLARED_INLINE_P (new_result);
1670 DECL_DISREGARD_INLINE_LIMITS (old_result)
1671 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1676 DECL_DECLARED_INLINE_P (old_result)
1677 |= DECL_DECLARED_INLINE_P (new_result);
1678 DECL_DISREGARD_INLINE_LIMITS (old_result)
1679 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1680 check_redeclaration_exception_specification (newdecl, olddecl);
1684 /* If the new declaration is a definition, update the file and
1685 line information on the declaration, and also make
1686 the old declaration the same definition. */
1687 if (DECL_INITIAL (new_result) != NULL_TREE)
1689 DECL_SOURCE_LOCATION (olddecl)
1690 = DECL_SOURCE_LOCATION (old_result)
1691 = DECL_SOURCE_LOCATION (newdecl);
1692 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1693 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1696 DECL_ARGUMENTS (old_result)
1697 = DECL_ARGUMENTS (new_result);
1698 for (parm = DECL_ARGUMENTS (old_result); parm;
1699 parm = TREE_CHAIN (parm))
1700 DECL_CONTEXT (parm) = old_result;
1709 /* Automatically handles default parameters. */
1710 tree oldtype = TREE_TYPE (olddecl);
1713 /* Merge the data types specified in the two decls. */
1714 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1716 /* If merge_types produces a non-typedef type, just use the old type. */
1717 if (TREE_CODE (newdecl) == TYPE_DECL
1718 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1721 if (TREE_CODE (newdecl) == VAR_DECL)
1723 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1724 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1725 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1726 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1727 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1728 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1730 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1731 if (DECL_LANG_SPECIFIC (olddecl)
1732 && CP_DECL_THREADPRIVATE_P (olddecl))
1734 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1735 if (!DECL_LANG_SPECIFIC (newdecl))
1736 retrofit_lang_decl (newdecl);
1738 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1739 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1743 /* Do this after calling `merge_types' so that default
1744 parameters don't confuse us. */
1745 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 check_redeclaration_exception_specification (newdecl, olddecl);
1747 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1749 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1750 check_default_args (newdecl);
1752 /* Lay the type out, unless already done. */
1753 if (! same_type_p (newtype, oldtype)
1754 && TREE_TYPE (newdecl) != error_mark_node
1755 && !(processing_template_decl && uses_template_parms (newdecl)))
1756 layout_type (TREE_TYPE (newdecl));
1758 if ((TREE_CODE (newdecl) == VAR_DECL
1759 || TREE_CODE (newdecl) == PARM_DECL
1760 || TREE_CODE (newdecl) == RESULT_DECL
1761 || TREE_CODE (newdecl) == FIELD_DECL
1762 || TREE_CODE (newdecl) == TYPE_DECL)
1763 && !(processing_template_decl && uses_template_parms (newdecl)))
1764 layout_decl (newdecl, 0);
1766 /* Merge the type qualifiers. */
1767 if (TREE_READONLY (newdecl))
1768 TREE_READONLY (olddecl) = 1;
1769 if (TREE_THIS_VOLATILE (newdecl))
1770 TREE_THIS_VOLATILE (olddecl) = 1;
1771 if (TREE_NOTHROW (newdecl))
1772 TREE_NOTHROW (olddecl) = 1;
1774 /* Merge deprecatedness. */
1775 if (TREE_DEPRECATED (newdecl))
1776 TREE_DEPRECATED (olddecl) = 1;
1778 /* Preserve function specific target and optimization options */
1779 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1781 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1782 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1783 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1784 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1786 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1787 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1788 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1789 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1792 /* Merge the initialization information. */
1793 if (DECL_INITIAL (newdecl) == NULL_TREE
1794 && DECL_INITIAL (olddecl) != NULL_TREE)
1796 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1797 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1798 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1800 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1801 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1805 /* Merge the section attribute.
1806 We want to issue an error if the sections conflict but that must be
1807 done later in decl_attributes since we are called before attributes
1809 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1810 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1814 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1815 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1816 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1817 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1818 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1819 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1820 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1821 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1822 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1823 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1824 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1825 /* Keep the old RTL. */
1826 COPY_DECL_RTL (olddecl, newdecl);
1828 else if (TREE_CODE (newdecl) == VAR_DECL
1829 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1831 /* Keep the old RTL. We cannot keep the old RTL if the old
1832 declaration was for an incomplete object and the new
1833 declaration is not since many attributes of the RTL will
1835 COPY_DECL_RTL (olddecl, newdecl);
1838 /* If cannot merge, then use the new type and qualifiers,
1839 and don't preserve the old rtl. */
1842 /* Clean out any memory we had of the old declaration. */
1843 tree oldstatic = value_member (olddecl, static_aggregates);
1845 TREE_VALUE (oldstatic) = error_mark_node;
1847 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1848 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1849 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1850 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1853 /* Merge the storage class information. */
1854 merge_weak (newdecl, olddecl);
1856 if (DECL_ONE_ONLY (olddecl))
1857 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1859 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1860 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1861 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1862 if (! DECL_EXTERNAL (olddecl))
1863 DECL_EXTERNAL (newdecl) = 0;
1865 new_template_info = NULL_TREE;
1866 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1868 bool new_redefines_gnu_inline = false;
1870 if (new_defines_function
1871 && ((DECL_INTERFACE_KNOWN (olddecl)
1872 && TREE_CODE (olddecl) == FUNCTION_DECL)
1873 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1874 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1875 == FUNCTION_DECL))))
1879 if (TREE_CODE (fn) == TEMPLATE_DECL)
1880 fn = DECL_TEMPLATE_RESULT (olddecl);
1882 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1885 if (!new_redefines_gnu_inline)
1887 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1888 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1889 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1891 DECL_TEMPLATE_INSTANTIATED (newdecl)
1892 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1893 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1895 /* If the OLDDECL is an instantiation and/or specialization,
1896 then the NEWDECL must be too. But, it may not yet be marked
1897 as such if the caller has created NEWDECL, but has not yet
1898 figured out that it is a redeclaration. */
1899 if (!DECL_USE_TEMPLATE (newdecl))
1900 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1902 /* Don't really know how much of the language-specific
1903 values we should copy from old to new. */
1904 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1905 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1906 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1907 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1909 if (LANG_DECL_HAS_MIN (newdecl))
1911 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1912 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1913 if (DECL_TEMPLATE_INFO (newdecl))
1914 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1915 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1917 /* Only functions have these fields. */
1918 if (TREE_CODE (newdecl) == FUNCTION_DECL
1919 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1921 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1922 olddecl_friend = DECL_FRIEND_P (olddecl);
1923 hidden_friend = (DECL_ANTICIPATED (olddecl)
1924 && DECL_HIDDEN_FRIEND_P (olddecl)
1925 && newdecl_is_friend);
1926 DECL_BEFRIENDING_CLASSES (newdecl)
1927 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1928 DECL_BEFRIENDING_CLASSES (olddecl));
1929 /* DECL_THUNKS is only valid for virtual functions,
1930 otherwise it is a DECL_FRIEND_CONTEXT. */
1931 if (DECL_VIRTUAL_P (newdecl))
1932 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1936 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1940 /* Merge parameter attributes. */
1941 tree oldarg, newarg;
1942 for (oldarg = DECL_ARGUMENTS(olddecl),
1943 newarg = DECL_ARGUMENTS(newdecl);
1945 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1946 DECL_ATTRIBUTES (newarg)
1947 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1948 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1951 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1952 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1954 /* If newdecl is not a specialization, then it is not a
1955 template-related function at all. And that means that we
1956 should have exited above, returning 0. */
1957 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1959 if (DECL_ODR_USED (olddecl))
1960 /* From [temp.expl.spec]:
1962 If a template, a member template or the member of a class
1963 template is explicitly specialized then that
1964 specialization shall be declared before the first use of
1965 that specialization that would cause an implicit
1966 instantiation to take place, in every translation unit in
1967 which such a use occurs. */
1968 error ("explicit specialization of %qD after first use",
1971 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1973 /* Don't propagate visibility from the template to the
1974 specialization here. We'll do that in determine_visibility if
1976 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1978 /* [temp.expl.spec/14] We don't inline explicit specialization
1979 just because the primary template says so. */
1981 else if (new_defines_function && DECL_INITIAL (olddecl))
1983 /* Never inline re-defined extern inline functions.
1984 FIXME: this could be better handled by keeping both
1985 function as separate declarations. */
1986 DECL_UNINLINABLE (newdecl) = 1;
1990 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1991 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1993 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1995 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1996 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1998 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1999 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2000 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2001 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2004 /* Preserve abstractness on cloned [cd]tors. */
2005 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2007 /* Update newdecl's parms to point at olddecl. */
2008 for (parm = DECL_ARGUMENTS (newdecl); parm;
2009 parm = TREE_CHAIN (parm))
2010 DECL_CONTEXT (parm) = olddecl;
2014 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2015 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2016 COPY_DECL_RTL (newdecl, olddecl);
2018 if (! types_match || new_defines_function)
2020 /* These need to be copied so that the names are available.
2021 Note that if the types do match, we'll preserve inline
2022 info and other bits, but if not, we won't. */
2023 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2024 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2026 if (new_defines_function)
2027 /* If defining a function declared with other language
2028 linkage, use the previously declared language linkage. */
2029 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2030 else if (types_match)
2032 /* If redeclaring a builtin function, and not a definition,
2033 it stays built in. */
2034 if (DECL_BUILT_IN (olddecl))
2036 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2037 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2038 /* If we're keeping the built-in definition, keep the rtl,
2039 regardless of declaration matches. */
2040 COPY_DECL_RTL (olddecl, newdecl);
2043 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2044 /* Don't clear out the arguments if we're just redeclaring a
2046 if (DECL_ARGUMENTS (olddecl))
2047 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2050 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2051 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2053 /* Now preserve various other info from the definition. */
2054 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2055 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2056 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2057 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2059 /* Warn about conflicting visibility specifications. */
2060 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2061 && DECL_VISIBILITY_SPECIFIED (newdecl)
2062 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2064 warning_at (input_location, OPT_Wattributes,
2065 "%q+D: visibility attribute ignored because it", newdecl);
2066 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2067 "conflicts with previous declaration here");
2069 /* Choose the declaration which specified visibility. */
2070 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2072 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2073 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2075 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2076 so keep this behavior. */
2077 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2079 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2080 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2083 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2084 with that from NEWDECL below. */
2085 if (DECL_LANG_SPECIFIC (olddecl))
2087 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2088 != DECL_LANG_SPECIFIC (newdecl));
2089 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2092 /* Merge the USED information. */
2093 if (TREE_USED (olddecl))
2094 TREE_USED (newdecl) = 1;
2095 else if (TREE_USED (newdecl))
2096 TREE_USED (olddecl) = 1;
2098 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2102 function_size = sizeof (struct tree_decl_common);
2104 memcpy ((char *) olddecl + sizeof (struct tree_common),
2105 (char *) newdecl + sizeof (struct tree_common),
2106 function_size - sizeof (struct tree_common));
2108 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2109 (char *) newdecl + sizeof (struct tree_decl_common),
2110 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2111 if (new_template_info)
2112 /* If newdecl is a template instantiation, it is possible that
2113 the following sequence of events has occurred:
2115 o A friend function was declared in a class template. The
2116 class template was instantiated.
2118 o The instantiation of the friend declaration was
2119 recorded on the instantiation list, and is newdecl.
2121 o Later, however, instantiate_class_template called pushdecl
2122 on the newdecl to perform name injection. But, pushdecl in
2123 turn called duplicate_decls when it discovered that another
2124 declaration of a global function with the same name already
2127 o Here, in duplicate_decls, we decided to clobber newdecl.
2129 If we're going to do that, we'd better make sure that
2130 olddecl, and not newdecl, is on the list of
2131 instantiations so that if we try to do the instantiation
2132 again we won't get the clobbered declaration. */
2133 reregister_specialization (newdecl,
2139 size_t size = tree_code_size (TREE_CODE (olddecl));
2140 memcpy ((char *) olddecl + sizeof (struct tree_common),
2141 (char *) newdecl + sizeof (struct tree_common),
2142 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2143 switch (TREE_CODE (olddecl))
2153 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2154 (char *) newdecl + sizeof (struct tree_decl_common),
2155 size - sizeof (struct tree_decl_common)
2156 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2160 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2161 (char *) newdecl + sizeof (struct tree_decl_common),
2162 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2163 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2167 DECL_UID (olddecl) = olddecl_uid;
2169 DECL_FRIEND_P (olddecl) = 1;
2172 DECL_ANTICIPATED (olddecl) = 1;
2173 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2176 /* NEWDECL contains the merged attribute lists.
2177 Update OLDDECL to be the same. */
2178 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2180 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2181 so that encode_section_info has a chance to look at the new decl
2182 flags and attributes. */
2183 if (DECL_RTL_SET_P (olddecl)
2184 && (TREE_CODE (olddecl) == FUNCTION_DECL
2185 || (TREE_CODE (olddecl) == VAR_DECL
2186 && TREE_STATIC (olddecl))))
2187 make_decl_rtl (olddecl);
2189 /* The NEWDECL will no longer be needed. Because every out-of-class
2190 declaration of a member results in a call to duplicate_decls,
2191 freeing these nodes represents in a significant savings. */
2197 /* Return zero if the declaration NEWDECL is valid
2198 when the declaration OLDDECL (assumed to be for the same name)
2199 has already been seen.
2200 Otherwise return an error message format string with a %s
2201 where the identifier should go. */
2204 redeclaration_error_message (tree newdecl, tree olddecl)
2206 if (TREE_CODE (newdecl) == TYPE_DECL)
2208 /* Because C++ can put things into name space for free,
2209 constructs like "typedef struct foo { ... } foo"
2210 would look like an erroneous redeclaration. */
2211 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2214 return "redefinition of %q#D";
2216 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2218 /* If this is a pure function, its olddecl will actually be
2219 the original initialization to `0' (which we force to call
2220 abort()). Don't complain about redefinition in this case. */
2221 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2222 && DECL_INITIAL (olddecl) == NULL_TREE)
2225 /* If both functions come from different namespaces, this is not
2226 a redeclaration - this is a conflict with a used function. */
2227 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2228 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2229 && ! decls_match (olddecl, newdecl))
2230 return "%qD conflicts with used function";
2232 /* We'll complain about linkage mismatches in
2233 warn_extern_redeclared_static. */
2235 /* Defining the same name twice is no good. */
2236 if (DECL_INITIAL (olddecl) != NULL_TREE
2237 && DECL_INITIAL (newdecl) != NULL_TREE)
2239 if (DECL_NAME (olddecl) == NULL_TREE)
2240 return "%q#D not declared in class";
2241 else if (!GNU_INLINE_P (olddecl)
2242 || GNU_INLINE_P (newdecl))
2243 return "redefinition of %q#D";
2246 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2248 bool olda = GNU_INLINE_P (olddecl);
2249 bool newa = GNU_INLINE_P (newdecl);
2254 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2256 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2262 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2266 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2268 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2269 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2270 return "redefinition of %q#D";
2274 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2275 || (DECL_TEMPLATE_RESULT (newdecl)
2276 == DECL_TEMPLATE_RESULT (olddecl)))
2279 nt = DECL_TEMPLATE_RESULT (newdecl);
2280 if (DECL_TEMPLATE_INFO (nt))
2281 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2282 ot = DECL_TEMPLATE_RESULT (olddecl);
2283 if (DECL_TEMPLATE_INFO (ot))
2284 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2285 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2286 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2287 return "redefinition of %q#D";
2289 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2291 bool olda = GNU_INLINE_P (ot);
2292 bool newa = GNU_INLINE_P (nt);
2297 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2299 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2303 /* Core issue #226 (C++0x):
2305 If a friend function template declaration specifies a
2306 default template-argument, that declaration shall be a
2307 definition and shall be the only declaration of the
2308 function template in the translation unit. */
2309 if ((cxx_dialect != cxx98)
2310 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2311 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2312 /*is_primary=*/1, /*is_partial=*/0,
2313 /*is_friend_decl=*/2))
2314 return "redeclaration of friend %q#D may not have default template arguments";
2318 else if (TREE_CODE (newdecl) == VAR_DECL
2319 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2320 && (! DECL_LANG_SPECIFIC (olddecl)
2321 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2322 || DECL_THREAD_LOCAL_P (newdecl)))
2324 /* Only variables can be thread-local, and all declarations must
2325 agree on this property. */
2326 if (DECL_THREAD_LOCAL_P (newdecl))
2327 return "thread-local declaration of %q#D follows "
2328 "non-thread-local declaration";
2330 return "non-thread-local declaration of %q#D follows "
2331 "thread-local declaration";
2333 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2335 /* The objects have been declared at namespace scope. If either
2336 is a member of an anonymous union, then this is an invalid
2337 redeclaration. For example:
2343 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2344 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2345 return "redeclaration of %q#D";
2346 /* If at least one declaration is a reference, there is no
2347 conflict. For example:
2353 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2355 /* Reject two definitions. */
2356 return "redefinition of %q#D";
2360 /* Objects declared with block scope: */
2361 /* Reject two definitions, and reject a definition
2362 together with an external reference. */
2363 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2364 return "redeclaration of %q#D";
2369 /* Hash and equality functions for the named_label table. */
2372 named_label_entry_hash (const void *data)
2374 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2375 return DECL_UID (ent->label_decl);
2379 named_label_entry_eq (const void *a, const void *b)
2381 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2382 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2383 return ent_a->label_decl == ent_b->label_decl;
2386 /* Create a new label, named ID. */
2389 make_label_decl (tree id, int local_p)
2391 struct named_label_entry *ent;
2395 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2397 DECL_CONTEXT (decl) = current_function_decl;
2398 DECL_MODE (decl) = VOIDmode;
2399 C_DECLARED_LABEL_FLAG (decl) = local_p;
2401 /* Say where one reference is to the label, for the sake of the
2402 error if it is not defined. */
2403 DECL_SOURCE_LOCATION (decl) = input_location;
2405 /* Record the fact that this identifier is bound to this label. */
2406 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2408 /* Create the label htab for the function on demand. */
2410 named_labels = htab_create_ggc (13, named_label_entry_hash,
2411 named_label_entry_eq, NULL);
2413 /* Record this label on the list of labels used in this function.
2414 We do this before calling make_label_decl so that we get the
2415 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2416 ent = GGC_CNEW (struct named_label_entry);
2417 ent->label_decl = decl;
2419 slot = htab_find_slot (named_labels, ent, INSERT);
2420 gcc_assert (*slot == NULL);
2426 /* Look for a label named ID in the current function. If one cannot
2427 be found, create one. (We keep track of used, but undefined,
2428 labels, and complain about them at the end of a function.) */
2431 lookup_label (tree id)
2435 timevar_push (TV_NAME_LOOKUP);
2436 /* You can't use labels at global scope. */
2437 if (current_function_decl == NULL_TREE)
2439 error ("label %qE referenced outside of any function", id);
2440 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2443 /* See if we've already got this label. */
2444 decl = IDENTIFIER_LABEL_VALUE (id);
2445 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2446 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2448 decl = make_label_decl (id, /*local_p=*/0);
2449 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2452 /* Declare a local label named ID. */
2455 declare_local_label (tree id)
2459 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2460 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2461 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2462 current_binding_level->shadowed_labels);
2463 current_binding_level->shadowed_labels = shadow;
2465 decl = make_label_decl (id, /*local_p=*/1);
2466 TREE_VALUE (shadow) = decl;
2471 /* Returns nonzero if it is ill-formed to jump past the declaration of
2472 DECL. Returns 2 if it's also a real problem. */
2475 decl_jump_unsafe (tree decl)
2477 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2478 with automatic storage duration is not in scope to a point where it is
2479 in scope is ill-formed unless the variable has scalar type, class type
2480 with a trivial default constructor and a trivial destructor, a
2481 cv-qualified version of one of these types, or an array of one of the
2482 preceding types and is declared without an initializer (8.5). */
2483 tree type = TREE_TYPE (decl);
2485 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2486 || type == error_mark_node)
2489 type = strip_array_types (type);
2491 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2492 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2495 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2501 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2504 identify_goto (tree decl, const location_t *locus)
2507 permerror (input_location, "jump to label %qD", decl);
2509 permerror (input_location, "jump to case label");
2511 permerror (*locus, " from here");
2514 /* Check that a single previously seen jump to a newly defined label
2515 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2516 the jump context; NAMES are the names in scope in LEVEL at the jump
2517 context; LOCUS is the source position of the jump or 0. Returns
2518 true if all is well. */
2521 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2522 bool exited_omp, const location_t *locus)
2524 struct cp_binding_level *b;
2525 bool identified = false, saw_eh = false, saw_omp = false;
2529 identify_goto (decl, locus);
2530 error (" exits OpenMP structured block");
2531 identified = saw_omp = true;
2534 for (b = current_binding_level; b ; b = b->level_chain)
2536 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2538 for (new_decls = b->names; new_decls != old_decls;
2539 new_decls = TREE_CHAIN (new_decls))
2541 int problem = decl_jump_unsafe (new_decls);
2547 identify_goto (decl, locus);
2551 error (" crosses initialization of %q+#D", new_decls);
2553 permerror (input_location, " enters scope of %q+#D which has "
2554 "non-trivial destructor", new_decls);
2559 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2563 identify_goto (decl, locus);
2566 if (b->kind == sk_try)
2567 error (" enters try block");
2569 error (" enters catch block");
2572 if (b->kind == sk_omp && !saw_omp)
2576 identify_goto (decl, locus);
2579 error (" enters OpenMP structured block");
2588 check_previous_goto (tree decl, struct named_label_use_entry *use)
2590 check_previous_goto_1 (decl, use->binding_level,
2591 use->names_in_scope, use->in_omp_scope,
2592 &use->o_goto_locus);
2596 check_switch_goto (struct cp_binding_level* level)
2598 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2601 /* Check that a new jump to a label DECL is OK. Called by
2602 finish_goto_stmt. */
2605 check_goto (tree decl)
2607 struct named_label_entry *ent, dummy;
2608 bool saw_catch = false, identified = false;
2611 /* We can't know where a computed goto is jumping.
2612 So we assume that it's OK. */
2613 if (TREE_CODE (decl) != LABEL_DECL)
2616 /* We didn't record any information about this label when we created it,
2617 and there's not much point since it's trivial to analyze as a return. */
2618 if (decl == cdtor_label)
2621 dummy.label_decl = decl;
2622 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2623 gcc_assert (ent != NULL);
2625 /* If the label hasn't been defined yet, defer checking. */
2626 if (! DECL_INITIAL (decl))
2628 struct named_label_use_entry *new_use;
2630 /* Don't bother creating another use if the last goto had the
2631 same data, and will therefore create the same set of errors. */
2633 && ent->uses->names_in_scope == current_binding_level->names)
2636 new_use = GGC_NEW (struct named_label_use_entry);
2637 new_use->binding_level = current_binding_level;
2638 new_use->names_in_scope = current_binding_level->names;
2639 new_use->o_goto_locus = input_location;
2640 new_use->in_omp_scope = false;
2642 new_use->next = ent->uses;
2643 ent->uses = new_use;
2647 if (ent->in_try_scope || ent->in_catch_scope
2648 || ent->in_omp_scope || ent->bad_decls)
2650 permerror (input_location, "jump to label %q+D", decl);
2651 permerror (input_location, " from here");
2655 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2657 tree b = TREE_VALUE (bad);
2658 int u = decl_jump_unsafe (b);
2660 if (u > 1 && DECL_ARTIFICIAL (b))
2662 /* Can't skip init of __exception_info. */
2663 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2667 error (" skips initialization of %q+#D", b);
2669 permerror (input_location, " enters scope of %q+#D which has "
2670 "non-trivial destructor", b);
2673 if (ent->in_try_scope)
2674 error (" enters try block");
2675 else if (ent->in_catch_scope && !saw_catch)
2676 error (" enters catch block");
2678 if (ent->in_omp_scope)
2679 error (" enters OpenMP structured block");
2680 else if (flag_openmp)
2682 struct cp_binding_level *b;
2683 for (b = current_binding_level; b ; b = b->level_chain)
2685 if (b == ent->binding_level)
2687 if (b->kind == sk_omp)
2691 permerror (input_location, "jump to label %q+D", decl);
2692 permerror (input_location, " from here");
2695 error (" exits OpenMP structured block");
2702 /* Check that a return is ok wrt OpenMP structured blocks.
2703 Called by finish_return_stmt. Returns true if all is well. */
2706 check_omp_return (void)
2708 struct cp_binding_level *b;
2709 for (b = current_binding_level; b ; b = b->level_chain)
2710 if (b->kind == sk_omp)
2712 error ("invalid exit from OpenMP structured block");
2718 /* Define a label, specifying the location in the source file.
2719 Return the LABEL_DECL node for the label. */
2722 define_label (location_t location, tree name)
2724 struct named_label_entry *ent, dummy;
2725 struct cp_binding_level *p;
2728 timevar_push (TV_NAME_LOOKUP);
2730 decl = lookup_label (name);
2732 dummy.label_decl = decl;
2733 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2734 gcc_assert (ent != NULL);
2736 /* After labels, make any new cleanups in the function go into their
2737 own new (temporary) binding contour. */
2738 for (p = current_binding_level;
2739 p->kind != sk_function_parms;
2741 p->more_cleanups_ok = 0;
2743 if (name == get_identifier ("wchar_t"))
2744 permerror (input_location, "label named wchar_t");
2746 if (DECL_INITIAL (decl) != NULL_TREE)
2748 error ("duplicate label %qD", decl);
2749 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2753 struct named_label_use_entry *use;
2755 /* Mark label as having been defined. */
2756 DECL_INITIAL (decl) = error_mark_node;
2757 /* Say where in the source. */
2758 DECL_SOURCE_LOCATION (decl) = location;
2760 ent->binding_level = current_binding_level;
2761 ent->names_in_scope = current_binding_level->names;
2763 for (use = ent->uses; use ; use = use->next)
2764 check_previous_goto (decl, use);
2768 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2773 struct cp_binding_level *level;
2774 struct cp_switch *next;
2775 /* The SWITCH_STMT being built. */
2777 /* A splay-tree mapping the low element of a case range to the high
2778 element, or NULL_TREE if there is no high element. Used to
2779 determine whether or not a new case label duplicates an old case
2780 label. We need a tree, rather than simply a hash table, because
2781 of the GNU case range extension. */
2785 /* A stack of the currently active switch statements. The innermost
2786 switch statement is on the top of the stack. There is no need to
2787 mark the stack for garbage collection because it is only active
2788 during the processing of the body of a function, and we never
2789 collect at that point. */
2791 static struct cp_switch *switch_stack;
2793 /* Called right after a switch-statement condition is parsed.
2794 SWITCH_STMT is the switch statement being parsed. */
2797 push_switch (tree switch_stmt)
2799 struct cp_switch *p = XNEW (struct cp_switch);
2800 p->level = current_binding_level;
2801 p->next = switch_stack;
2802 p->switch_stmt = switch_stmt;
2803 p->cases = splay_tree_new (case_compare, NULL, NULL);
2810 struct cp_switch *cs = switch_stack;
2811 location_t switch_location;
2813 /* Emit warnings as needed. */
2814 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2815 switch_location = EXPR_LOCATION (cs->switch_stmt);
2817 switch_location = input_location;
2818 if (!processing_template_decl)
2819 c_do_switch_warnings (cs->cases, switch_location,
2820 SWITCH_STMT_TYPE (cs->switch_stmt),
2821 SWITCH_STMT_COND (cs->switch_stmt));
2823 splay_tree_delete (cs->cases);
2824 switch_stack = switch_stack->next;
2828 /* Note that we've seen a definition of a case label, and complain if this
2829 is a bad place for one. */
2832 finish_case_label (location_t loc, tree low_value, tree high_value)
2835 struct cp_binding_level *p;
2837 if (processing_template_decl)
2841 /* For templates, just add the case label; we'll do semantic
2842 analysis at instantiation-time. */
2843 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2844 return add_stmt (build_case_label (loc, low_value, high_value, label));
2847 /* Find the condition on which this switch statement depends. */
2848 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2849 if (cond && TREE_CODE (cond) == TREE_LIST)
2850 cond = TREE_VALUE (cond);
2852 if (!check_switch_goto (switch_stack->level))
2853 return error_mark_node;
2855 r = c_add_case_label (loc, switch_stack->cases, cond,
2856 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2857 low_value, high_value);
2859 /* After labels, make any new cleanups in the function go into their
2860 own new (temporary) binding contour. */
2861 for (p = current_binding_level;
2862 p->kind != sk_function_parms;
2864 p->more_cleanups_ok = 0;
2869 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2872 typename_hash (const void* k)
2875 const_tree const t = (const_tree) k;
2877 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2878 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2883 typedef struct typename_info {
2891 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2892 really of type `typename_info*' */
2895 typename_compare (const void * k1, const void * k2)
2897 const_tree const t1 = (const_tree) k1;
2898 const typename_info *const t2 = (const typename_info *) k2;
2900 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2901 && TYPE_CONTEXT (t1) == t2->scope
2902 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2903 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2904 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2907 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2908 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2910 Returns the new TYPENAME_TYPE. */
2912 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2915 build_typename_type (tree context, tree name, tree fullname,
2916 enum tag_types tag_type)
2924 if (typename_htab == NULL)
2925 typename_htab = htab_create_ggc (61, &typename_hash,
2926 &typename_compare, NULL);
2928 ti.scope = FROB_CONTEXT (context);
2930 ti.template_id = fullname;
2931 ti.enum_p = tag_type == enum_type;
2932 ti.class_p = (tag_type == class_type
2933 || tag_type == record_type
2934 || tag_type == union_type);
2935 hash = (htab_hash_pointer (ti.scope)
2936 ^ htab_hash_pointer (ti.name));
2938 /* See if we already have this type. */
2939 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2944 /* Build the TYPENAME_TYPE. */
2945 t = cxx_make_type (TYPENAME_TYPE);
2946 TYPE_CONTEXT (t) = ti.scope;
2947 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2948 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2949 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2951 /* Build the corresponding TYPE_DECL. */
2952 d = build_decl (input_location, TYPE_DECL, name, t);
2953 TYPE_NAME (TREE_TYPE (d)) = d;
2954 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2955 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2956 DECL_ARTIFICIAL (d) = 1;
2958 /* Store it in the hash table. */
2961 /* TYPENAME_TYPEs must always be compared structurally, because
2962 they may or may not resolve down to another type depending on
2963 the currently open classes. */
2964 SET_TYPE_STRUCTURAL_EQUALITY (t);
2970 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2971 provided to name the type. Returns an appropriate type, unless an
2972 error occurs, in which case error_mark_node is returned. If we
2973 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2974 return that, rather than the _TYPE it corresponds to, in other
2975 cases we look through the type decl. If TF_ERROR is set, complain
2976 about errors, otherwise be quiet. */
2979 make_typename_type (tree context, tree name, enum tag_types tag_type,
2980 tsubst_flags_t complain)
2986 if (name == error_mark_node
2987 || context == NULL_TREE
2988 || context == error_mark_node)
2989 return error_mark_node;
2993 if (!(TYPE_LANG_SPECIFIC (name)
2994 && (CLASSTYPE_IS_TEMPLATE (name)
2995 || CLASSTYPE_USE_TEMPLATE (name))))
2996 name = TYPE_IDENTIFIER (name);
2998 /* Create a TEMPLATE_ID_EXPR for the type. */
2999 name = build_nt (TEMPLATE_ID_EXPR,
3000 CLASSTYPE_TI_TEMPLATE (name),
3001 CLASSTYPE_TI_ARGS (name));
3003 else if (TREE_CODE (name) == TYPE_DECL)
3004 name = DECL_NAME (name);
3008 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3010 name = TREE_OPERAND (name, 0);
3011 if (TREE_CODE (name) == TEMPLATE_DECL)
3012 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3013 else if (TREE_CODE (name) == OVERLOAD)
3015 error ("%qD is not a type", name);
3016 return error_mark_node;
3019 if (TREE_CODE (name) == TEMPLATE_DECL)
3021 error ("%qD used without template parameters", name);
3022 return error_mark_node;
3024 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3025 gcc_assert (TYPE_P (context));
3027 if (!MAYBE_CLASS_TYPE_P (context))
3029 if (complain & tf_error)
3030 error ("%q#T is not a class", context);
3031 return error_mark_node;
3034 /* When the CONTEXT is a dependent type, NAME could refer to a
3035 dependent base class of CONTEXT. But look inside it anyway
3036 if CONTEXT is a currently open scope, in case it refers to a
3037 member of the current instantiation or a non-dependent base;
3038 lookup will stop when we hit a dependent base. */
3039 if (!dependent_scope_p (context))
3040 /* We should only set WANT_TYPE when we're a nested typename type.
3041 Then we can give better diagnostics if we find a non-type. */
3042 t = lookup_field (context, name, 0, /*want_type=*/true);
3046 if (!t && dependent_type_p (context))
3047 return build_typename_type (context, name, fullname, tag_type);
3049 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3053 if (complain & tf_error)
3054 error (want_template ? "no class template named %q#T in %q#T"
3055 : "no type named %q#T in %q#T", name, context);
3056 return error_mark_node;
3059 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3061 if (complain & tf_error)
3062 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3064 return error_mark_node;
3066 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3068 if (complain & tf_error)
3069 error ("%<typename %T::%D%> names %q#T, which is not a type",
3071 return error_mark_node;
3074 if (complain & tf_error)
3075 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3078 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3080 /*entering_scope=*/0,
3081 tf_warning_or_error | tf_user);
3083 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3089 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3090 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3091 in which case error_mark_node is returned.
3093 If PARM_LIST is non-NULL, also make sure that the template parameter
3094 list of TEMPLATE_DECL matches.
3096 If COMPLAIN zero, don't complain about any errors that occur. */
3099 make_unbound_class_template (tree context, tree name, tree parm_list,
3100 tsubst_flags_t complain)
3106 name = TYPE_IDENTIFIER (name);
3107 else if (DECL_P (name))
3108 name = DECL_NAME (name);
3109 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3111 if (!dependent_type_p (context)
3112 || currently_open_class (context))
3114 tree tmpl = NULL_TREE;
3116 if (MAYBE_CLASS_TYPE_P (context))
3117 tmpl = lookup_field (context, name, 0, false);
3119 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3121 if (complain & tf_error)
3122 error ("no class template named %q#T in %q#T", name, context);
3123 return error_mark_node;
3127 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3129 if (complain & tf_error)
3131 error ("template parameters do not match template");
3132 error ("%q+D declared here", tmpl);
3134 return error_mark_node;
3137 if (complain & tf_error)
3138 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3143 /* Build the UNBOUND_CLASS_TEMPLATE. */
3144 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3145 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3146 TREE_TYPE (t) = NULL_TREE;
3147 SET_TYPE_STRUCTURAL_EQUALITY (t);
3149 /* Build the corresponding TEMPLATE_DECL. */
3150 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3151 TYPE_NAME (TREE_TYPE (d)) = d;
3152 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3153 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3154 DECL_ARTIFICIAL (d) = 1;
3155 DECL_TEMPLATE_PARMS (d) = parm_list;
3162 /* Push the declarations of builtin types into the namespace.
3163 RID_INDEX is the index of the builtin type in the array
3164 RID_POINTERS. NAME is the name used when looking up the builtin
3165 type. TYPE is the _TYPE node for the builtin type. */
3168 record_builtin_type (enum rid rid_index,
3172 tree rname = NULL_TREE, tname = NULL_TREE;
3173 tree tdecl = NULL_TREE;
3175 if ((int) rid_index < (int) RID_MAX)
3176 rname = ridpointers[(int) rid_index];
3178 tname = get_identifier (name);
3180 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3181 eliminated. Built-in types should not be looked up name; their
3182 names are keywords that the parser can recognize. However, there
3183 is code in c-common.c that uses identifier_global_value to look
3184 up built-in types by name. */
3187 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3188 DECL_ARTIFICIAL (tdecl) = 1;
3189 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3195 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3196 DECL_ARTIFICIAL (tdecl) = 1;
3198 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3201 if (!TYPE_NAME (type))
3202 TYPE_NAME (type) = tdecl;
3205 debug_hooks->type_decl (tdecl, 0);
3208 /* Record one of the standard Java types.
3209 * Declare it as having the given NAME.
3210 * If SIZE > 0, it is the size of one of the integral types;
3211 * otherwise it is the negative of the size of one of the other types. */
3214 record_builtin_java_type (const char* name, int size)
3218 type = build_nonstandard_integer_type (size, 0);
3219 else if (size > -32)
3222 /* "__java_char" or ""__java_boolean". */
3223 type = build_nonstandard_integer_type (-size, 1);
3224 /* Get the signed type cached and attached to the unsigned type,
3225 so it doesn't get garbage-collected at "random" times,
3226 causing potential codegen differences out of different UIDs
3227 and different alias set numbers. */
3228 stype = build_nonstandard_integer_type (-size, 0);
3229 TREE_CHAIN (type) = stype;
3230 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3233 { /* "__java_float" or ""__java_double". */
3234 type = cxx_make_type (REAL_TYPE);
3235 TYPE_PRECISION (type) = - size;
3238 record_builtin_type (RID_MAX, name, type);
3239 decl = TYPE_NAME (type);
3241 /* Suppress generate debug symbol entries for these types,
3242 since for normal C++ they are just clutter.
3243 However, push_lang_context undoes this if extern "Java" is seen. */
3244 DECL_IGNORED_P (decl) = 1;
3246 TYPE_FOR_JAVA (type) = 1;
3250 /* Push a type into the namespace so that the back ends ignore it. */
3253 record_unknown_type (tree type, const char* name)
3255 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3256 TYPE_DECL, get_identifier (name), type));
3257 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3258 DECL_IGNORED_P (decl) = 1;
3259 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3260 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3261 TYPE_ALIGN (type) = 1;
3262 TYPE_USER_ALIGN (type) = 0;
3263 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3266 /* A string for which we should create an IDENTIFIER_NODE at
3269 typedef struct predefined_identifier
3271 /* The name of the identifier. */
3272 const char *const name;
3273 /* The place where the IDENTIFIER_NODE should be stored. */
3275 /* Nonzero if this is the name of a constructor or destructor. */
3276 const int ctor_or_dtor_p;
3277 } predefined_identifier;
3279 /* Create all the predefined identifiers. */
3282 initialize_predefined_identifiers (void)
3284 const predefined_identifier *pid;
3286 /* A table of identifiers to create at startup. */
3287 static const predefined_identifier predefined_identifiers[] = {
3288 { "C++", &lang_name_cplusplus, 0 },
3289 { "C", &lang_name_c, 0 },
3290 { "Java", &lang_name_java, 0 },
3291 /* Some of these names have a trailing space so that it is
3292 impossible for them to conflict with names written by users. */
3293 { "__ct ", &ctor_identifier, 1 },
3294 { "__base_ctor ", &base_ctor_identifier, 1 },
3295 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3296 { "__dt ", &dtor_identifier, 1 },
3297 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3298 { "__base_dtor ", &base_dtor_identifier, 1 },
3299 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3300 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3301 { "nelts", &nelts_identifier, 0 },
3302 { THIS_NAME, &this_identifier, 0 },
3303 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3304 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3305 { "_vptr", &vptr_identifier, 0 },
3306 { "__vtt_parm", &vtt_parm_identifier, 0 },
3307 { "::", &global_scope_name, 0 },
3308 { "std", &std_identifier, 0 },
3312 for (pid = predefined_identifiers; pid->name; ++pid)
3314 *pid->node = get_identifier (pid->name);
3315 if (pid->ctor_or_dtor_p)
3316 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3320 /* Create the predefined scalar types of C,
3321 and some nodes representing standard constants (0, 1, (void *)0).
3322 Initialize the global binding level.
3323 Make definitions for built-in primitive functions. */
3326 cxx_init_decl_processing (void)
3329 tree void_ftype_ptr;
3331 build_common_tree_nodes (flag_signed_char, false);
3333 /* Create all the identifiers we need. */
3334 initialize_predefined_identifiers ();
3336 /* Create the global variables. */
3337 push_to_top_level ();
3339 current_function_decl = NULL_TREE;
3340 current_binding_level = NULL;
3341 /* Enter the global namespace. */
3342 gcc_assert (global_namespace == NULL_TREE);
3343 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3345 TREE_PUBLIC (global_namespace) = 1;
3346 begin_scope (sk_namespace, global_namespace);
3348 current_lang_name = NULL_TREE;
3350 if (flag_visibility_ms_compat)
3351 default_visibility = VISIBILITY_HIDDEN;
3354 current_lang_name = lang_name_c;
3356 /* Create the `std' namespace. */
3357 push_namespace (std_identifier);
3358 std_node = current_namespace;
3361 c_common_nodes_and_builtins ();
3363 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3364 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3365 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3366 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3367 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3368 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3369 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3370 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3372 integer_two_node = build_int_cst (NULL_TREE, 2);
3373 integer_three_node = build_int_cst (NULL_TREE, 3);
3375 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3376 truthvalue_type_node = boolean_type_node;
3377 truthvalue_false_node = boolean_false_node;
3378 truthvalue_true_node = boolean_true_node;
3380 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3383 record_builtin_type (RID_MAX, NULL, string_type_node);
3386 delta_type_node = ptrdiff_type_node;
3387 vtable_index_type = ptrdiff_type_node;
3389 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3390 void_ftype = build_function_type (void_type_node, void_list_node);
3391 void_ftype_ptr = build_function_type (void_type_node,
3392 tree_cons (NULL_TREE,
3396 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3398 /* C++ extensions */
3400 unknown_type_node = cxx_make_type (UNKNOWN_TYPE);
3401 record_unknown_type (unknown_type_node, "unknown type");
3403 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3404 TREE_TYPE (unknown_type_node) = unknown_type_node;
3406 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3408 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3409 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3411 init_list_type_node = cxx_make_type (UNKNOWN_TYPE);
3412 record_unknown_type (init_list_type_node, "init list");
3415 /* Make sure we get a unique function type, so we can give
3416 its pointer type a name. (This wins for gdb.) */
3417 tree vfunc_type = cxx_make_type (FUNCTION_TYPE);
3418 TREE_TYPE (vfunc_type) = integer_type_node;
3419 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3420 layout_type (vfunc_type);
3422 vtable_entry_type = build_pointer_type (vfunc_type);
3424 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3427 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3428 layout_type (vtbl_type_node);
3429 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3430 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3431 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3432 layout_type (vtbl_ptr_type_node);
3433 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3435 push_namespace (get_identifier ("__cxxabiv1"));
3436 abi_node = current_namespace;
3439 global_type_node = cxx_make_type (LANG_TYPE);
3440 record_unknown_type (global_type_node, "global type");
3443 current_lang_name = lang_name_cplusplus;
3447 tree bad_alloc_type_node;
3448 tree bad_alloc_decl;
3449 tree newtype, deltype;
3450 tree ptr_ftype_sizetype;
3452 push_namespace (std_identifier);
3453 bad_alloc_id = get_identifier ("bad_alloc");
3454 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3455 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3457 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3458 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3459 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3463 = build_function_type (ptr_type_node,
3464 tree_cons (NULL_TREE,
3467 newtype = build_exception_variant
3468 (ptr_ftype_sizetype, add_exception_specifier
3469 (NULL_TREE, bad_alloc_type_node, -1));
3470 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3471 push_cp_library_fn (NEW_EXPR, newtype);
3472 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3473 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3474 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3478 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3480 /* Perform other language dependent initializations. */
3481 init_class_processing ();
3482 init_rtti_processing ();
3483 init_template_processing ();
3485 if (flag_exceptions)
3486 init_exception_processing ();
3488 if (! supports_one_only ())
3491 make_fname_decl = cp_make_fname_decl;
3492 start_fname_decls ();
3494 /* Show we use EH for cleanups. */
3495 if (flag_exceptions)
3496 using_eh_for_cleanups ();
3499 /* Generate an initializer for a function naming variable from
3500 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3501 filled in with the type of the init. */
3504 cp_fname_init (const char* name, tree *type_p)
3506 tree domain = NULL_TREE;
3508 tree init = NULL_TREE;
3513 length = strlen (name);
3514 domain = build_index_type (size_int (length));
3515 init = build_string (length + 1, name);
3518 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3519 type = build_cplus_array_type (type, domain);
3524 TREE_TYPE (init) = type;
3526 init = error_mark_node;
3531 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3532 the decl, LOC is the location to give the decl, NAME is the
3533 initialization string and TYPE_DEP indicates whether NAME depended
3534 on the type of the function. We make use of that to detect
3535 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3536 at the point of first use, so we mustn't push the decl now. */
3539 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3541 const char *const name = (type_dep && processing_template_decl
3542 ? NULL : fname_as_string (type_dep));
3544 tree init = cp_fname_init (name, &type);
3545 tree decl = build_decl (loc, VAR_DECL, id, type);
3548 free (CONST_CAST (char *, name));
3550 /* As we're using pushdecl_with_scope, we must set the context. */
3551 DECL_CONTEXT (decl) = current_function_decl;
3552 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3554 TREE_STATIC (decl) = 1;
3555 TREE_READONLY (decl) = 1;
3556 DECL_ARTIFICIAL (decl) = 1;
3558 TREE_USED (decl) = 1;
3560 if (current_function_decl)
3562 struct cp_binding_level *b = current_binding_level;
3563 while (b->level_chain->kind != sk_function_parms)
3565 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3566 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3567 LOOKUP_ONLYCONVERTING);
3570 pushdecl_top_level_and_finish (decl, init);
3576 builtin_function_1 (tree decl, tree context, bool is_global)
3578 tree id = DECL_NAME (decl);
3579 const char *name = IDENTIFIER_POINTER (id);
3581 retrofit_lang_decl (decl);
3583 DECL_ARTIFICIAL (decl) = 1;
3584 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3585 SET_DECL_LANGUAGE (decl, lang_c);
3586 /* Runtime library routines are, by definition, available in an
3587 external shared object. */
3588 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3589 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3591 DECL_CONTEXT (decl) = context;
3594 pushdecl_top_level (decl);
3598 /* A function in the user's namespace should have an explicit
3599 declaration before it is used. Mark the built-in function as
3600 anticipated but not actually declared. */
3601 if (name[0] != '_' || name[1] != '_')
3602 DECL_ANTICIPATED (decl) = 1;
3603 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3605 size_t len = strlen (name);
3607 /* Treat __*_chk fortification functions as anticipated as well,
3608 unless they are __builtin_*. */
3609 if (len > strlen ("___chk")
3610 && memcmp (name + len - strlen ("_chk"),
3611 "_chk", strlen ("_chk") + 1) == 0)
3612 DECL_ANTICIPATED (decl) = 1;
3619 cxx_builtin_function (tree decl)
3621 tree id = DECL_NAME (decl);
3622 const char *name = IDENTIFIER_POINTER (id);
3623 /* All builtins that don't begin with an '_' should additionally
3624 go in the 'std' namespace. */
3627 tree decl2 = copy_node(decl);
3628 push_namespace (std_identifier);
3629 builtin_function_1 (decl2, std_node, false);
3633 return builtin_function_1 (decl, NULL_TREE, false);
3636 /* Like cxx_builtin_function, but guarantee the function is added to the global
3637 scope. This is to allow function specific options to add new machine
3638 dependent builtins when the target ISA changes via attribute((target(...)))
3639 which saves space on program startup if the program does not use non-generic
3643 cxx_builtin_function_ext_scope (tree decl)
3646 tree id = DECL_NAME (decl);
3647 const char *name = IDENTIFIER_POINTER (id);
3648 /* All builtins that don't begin with an '_' should additionally
3649 go in the 'std' namespace. */
3652 tree decl2 = copy_node(decl);
3653 push_namespace (std_identifier);
3654 builtin_function_1 (decl2, std_node, true);
3658 return builtin_function_1 (decl, NULL_TREE, true);
3661 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3662 function. Not called directly. */
3665 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3667 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3668 DECL_EXTERNAL (fn) = 1;
3669 TREE_PUBLIC (fn) = 1;
3670 DECL_ARTIFICIAL (fn) = 1;
3671 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3672 SET_DECL_LANGUAGE (fn, lang_c);
3673 /* Runtime library routines are, by definition, available in an
3674 external shared object. */
3675 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3676 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3680 /* Returns the _DECL for a library function with C linkage.
3681 We assume that such functions never throw; if this is incorrect,
3682 callers should unset TREE_NOTHROW. */
3685 build_library_fn (tree name, tree type)
3687 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3688 TREE_NOTHROW (fn) = 1;
3692 /* Returns the _DECL for a library function with C++ linkage. */
3695 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3697 tree fn = build_library_fn_1 (name, operator_code, type);
3698 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3699 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3700 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3704 /* Like build_library_fn, but takes a C string instead of an
3708 build_library_fn_ptr (const char* name, tree type)
3710 return build_library_fn (get_identifier (name), type);
3713 /* Like build_cp_library_fn, but takes a C string instead of an
3717 build_cp_library_fn_ptr (const char* name, tree type)
3719 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3722 /* Like build_library_fn, but also pushes the function so that we will
3723 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3724 may throw exceptions listed in RAISES. */
3727 push_library_fn (tree name, tree type, tree raises)
3732 type = build_exception_variant (type, raises);
3734 fn = build_library_fn (name, type);
3735 pushdecl_top_level (fn);
3739 /* Like build_cp_library_fn, but also pushes the function so that it
3740 will be found by normal lookup. */
3743 push_cp_library_fn (enum tree_code operator_code, tree type)
3745 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3752 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3756 push_void_library_fn (tree name, tree parmtypes)
3758 tree type = build_function_type (void_type_node, parmtypes);
3759 return push_library_fn (name, type, NULL_TREE);
3762 /* Like push_library_fn, but also note that this function throws
3763 and does not return. Used for __throw_foo and the like. */
3766 push_throw_library_fn (tree name, tree type)
3768 tree fn = push_library_fn (name, type, NULL_TREE);
3769 TREE_THIS_VOLATILE (fn) = 1;
3770 TREE_NOTHROW (fn) = 0;
3774 /* When we call finish_struct for an anonymous union, we create
3775 default copy constructors and such. But, an anonymous union
3776 shouldn't have such things; this function undoes the damage to the
3777 anonymous union type T.
3779 (The reason that we create the synthesized methods is that we don't
3780 distinguish `union { int i; }' from `typedef union { int i; } U'.
3781 The first is an anonymous union; the second is just an ordinary
3785 fixup_anonymous_aggr (tree t)
3789 /* Wipe out memory of synthesized methods. */
3790 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3791 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3792 TYPE_HAS_INIT_REF (t) = 0;
3793 TYPE_HAS_CONST_INIT_REF (t) = 0;
3794 TYPE_HAS_ASSIGN_REF (t) = 0;
3795 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3797 /* Splice the implicitly generated functions out of the TYPE_METHODS
3799 q = &TYPE_METHODS (t);
3802 if (DECL_ARTIFICIAL (*q))
3803 *q = TREE_CHAIN (*q);
3805 q = &TREE_CHAIN (*q);
3808 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3809 if (TYPE_METHODS (t))
3811 tree decl = TYPE_MAIN_DECL (t);
3813 if (TREE_CODE (t) != UNION_TYPE)
3814 error_at (DECL_SOURCE_LOCATION (decl),
3815 "an anonymous struct cannot have function members");
3817 error_at (DECL_SOURCE_LOCATION (decl),
3818 "an anonymous union cannot have function members");
3821 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3822 assignment operators (because they cannot have these methods themselves).
3823 For anonymous unions this is already checked because they are not allowed
3824 in any union, otherwise we have to check it. */
3825 if (TREE_CODE (t) != UNION_TYPE)
3829 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3830 if (TREE_CODE (field) == FIELD_DECL)
3832 type = TREE_TYPE (field);
3833 if (CLASS_TYPE_P (type))
3835 if (TYPE_NEEDS_CONSTRUCTING (type))
3836 error ("member %q+#D with constructor not allowed "
3837 "in anonymous aggregate", field);
3838 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3839 error ("member %q+#D with destructor not allowed "
3840 "in anonymous aggregate", field);
3841 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3842 error ("member %q+#D with copy assignment operator "
3843 "not allowed in anonymous aggregate", field);
3849 /* Make sure that a declaration with no declarator is well-formed, i.e.
3850 just declares a tagged type or anonymous union.
3852 Returns the type declared; or NULL_TREE if none. */
3855 check_tag_decl (cp_decl_specifier_seq *declspecs)
3857 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3858 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3859 /* If a class, struct, or enum type is declared by the DECLSPECS
3860 (i.e, if a class-specifier, enum-specifier, or non-typename
3861 elaborated-type-specifier appears in the DECLSPECS),
3862 DECLARED_TYPE is set to the corresponding type. */
3863 tree declared_type = NULL_TREE;
3864 bool error_p = false;
3866 if (declspecs->multiple_types_p)
3867 error ("multiple types in one declaration");
3868 else if (declspecs->redefined_builtin_type)
3870 if (!in_system_header)
3871 permerror (input_location, "redeclaration of C++ built-in type %qT",
3872 declspecs->redefined_builtin_type);
3877 && TYPE_P (declspecs->type)
3878 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3879 && MAYBE_CLASS_TYPE_P (declspecs->type))
3880 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3881 declared_type = declspecs->type;
3882 else if (declspecs->type == error_mark_node)
3884 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3885 permerror (input_location, "declaration does not declare anything");
3886 /* Check for an anonymous union. */
3887 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3888 && TYPE_ANONYMOUS_P (declared_type))
3890 /* 7/3 In a simple-declaration, the optional init-declarator-list
3891 can be omitted only when declaring a class (clause 9) or
3892 enumeration (7.2), that is, when the decl-specifier-seq contains
3893 either a class-specifier, an elaborated-type-specifier with
3894 a class-key (9.1), or an enum-specifier. In these cases and
3895 whenever a class-specifier or enum-specifier is present in the
3896 decl-specifier-seq, the identifiers in these specifiers are among
3897 the names being declared by the declaration (as class-name,
3898 enum-names, or enumerators, depending on the syntax). In such
3899 cases, and except for the declaration of an unnamed bit-field (9.6),
3900 the decl-specifier-seq shall introduce one or more names into the
3901 program, or shall redeclare a name introduced by a previous
3902 declaration. [Example:
3903 enum { }; // ill-formed
3904 typedef class { }; // ill-formed
3908 error ("missing type-name in typedef-declaration");
3911 /* Anonymous unions are objects, so they can have specifiers. */;
3912 SET_ANON_AGGR_TYPE_P (declared_type);
3914 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3915 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3920 if (declspecs->specs[(int)ds_inline]
3921 || declspecs->specs[(int)ds_virtual])
3922 error ("%qs can only be specified for functions",
3923 declspecs->specs[(int)ds_inline]
3924 ? "inline" : "virtual");
3926 && (!current_class_type
3927 || current_scope () != current_class_type))
3928 error ("%<friend%> can only be specified inside a class");
3929 else if (declspecs->specs[(int)ds_explicit])
3930 error ("%<explicit%> can only be specified for constructors");
3931 else if (declspecs->storage_class)
3932 error ("a storage class can only be specified for objects "
3934 else if (declspecs->specs[(int)ds_const]
3935 || declspecs->specs[(int)ds_volatile]
3936 || declspecs->specs[(int)ds_restrict]
3937 || declspecs->specs[(int)ds_thread])
3938 error ("qualifiers can only be specified for objects "
3940 else if (saw_typedef)
3941 warning (0, "%<typedef%> was ignored in this declaration");
3942 else if (declspecs->specs[(int) ds_constexpr])
3943 error ("%<constexpr> cannot be used for type declarations");
3946 return declared_type;
3949 /* Called when a declaration is seen that contains no names to declare.
3950 If its type is a reference to a structure, union or enum inherited
3951 from a containing scope, shadow that tag name for the current scope
3952 with a forward reference.
3953 If its type defines a new named structure or union
3954 or defines an enum, it is valid but we need not do anything here.
3955 Otherwise, it is an error.
3957 C++: may have to grok the declspecs to learn about static,
3958 complain for anonymous unions.
3960 Returns the TYPE declared -- or NULL_TREE if none. */
3963 shadow_tag (cp_decl_specifier_seq *declspecs)
3965 tree t = check_tag_decl (declspecs);
3970 if (declspecs->attributes)
3972 warning (0, "attribute ignored in declaration of %q+#T", t);
3973 warning (0, "attribute for %q+#T must follow the %qs keyword",
3974 t, class_key_or_enum_as_string (t));
3978 if (maybe_process_partial_specialization (t) == error_mark_node)
3981 /* This is where the variables in an anonymous union are
3982 declared. An anonymous union declaration looks like:
3984 because there is no declarator after the union, the parser
3985 sends that declaration here. */
3986 if (ANON_AGGR_TYPE_P (t))
3988 fixup_anonymous_aggr (t);
3990 if (TYPE_FIELDS (t))
3992 tree decl = grokdeclarator (/*declarator=*/NULL,
3993 declspecs, NORMAL, 0, NULL);
3994 finish_anon_union (decl);
4001 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4004 groktypename (cp_decl_specifier_seq *type_specifiers,
4005 const cp_declarator *declarator,
4006 bool is_template_arg)
4010 enum decl_context context
4011 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4012 attrs = type_specifiers->attributes;
4013 type_specifiers->attributes = NULL_TREE;
4014 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4015 if (attrs && type != error_mark_node)
4017 if (CLASS_TYPE_P (type))
4018 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4019 "outside of definition", type);
4020 else if (MAYBE_CLASS_TYPE_P (type))
4021 /* A template type parameter or other dependent type. */
4022 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4023 "type %qT without an associated declaration", type);
4025 cplus_decl_attributes (&type, attrs, 0);
4030 /* Process a DECLARATOR for a function-scope variable declaration,
4031 namespace-scope variable declaration, or function declaration.
4032 (Function definitions go through start_function; class member
4033 declarations appearing in the body of the class go through
4034 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4035 If an error occurs, the error_mark_node is returned instead.
4037 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4038 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4039 for an explicitly defaulted function, or SD_DELETED for an explicitly
4040 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4041 implicitly initialized via a default constructor. ATTRIBUTES and
4042 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4043 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4044 set, the caller is responsible for calling pop_scope. */
4047 start_decl (const cp_declarator *declarator,
4048 cp_decl_specifier_seq *declspecs,
4051 tree prefix_attributes,
4052 tree *pushed_scope_p)
4060 *pushed_scope_p = NULL_TREE;
4062 /* An object declared as __attribute__((deprecated)) suppresses
4063 warnings of uses of other deprecated items. */
4064 if (lookup_attribute ("deprecated", attributes))
4065 deprecated_state = DEPRECATED_SUPPRESS;
4067 attributes = chainon (attributes, prefix_attributes);
4069 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4072 deprecated_state = DEPRECATED_NORMAL;
4074 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4075 || decl == error_mark_node)
4076 return error_mark_node;
4078 type = TREE_TYPE (decl);
4080 context = DECL_CONTEXT (decl);
4084 *pushed_scope_p = push_scope (context);
4086 /* We are only interested in class contexts, later. */
4087 if (TREE_CODE (context) == NAMESPACE_DECL)
4088 context = NULL_TREE;
4092 /* Is it valid for this decl to have an initializer at all?
4093 If not, set INITIALIZED to zero, which will indirectly
4094 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4095 switch (TREE_CODE (decl))
4098 error ("typedef %qD is initialized (use decltype instead)", decl);
4099 return error_mark_node;
4102 if (initialized == SD_DELETED)
4103 /* We'll handle the rest of the semantics later, but we need to
4104 set this now so it's visible to duplicate_decls. */
4105 DECL_DELETED_FN (decl) = 1;
4114 if (! toplevel_bindings_p ()
4115 && DECL_EXTERNAL (decl))
4116 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4118 DECL_EXTERNAL (decl) = 0;
4119 if (toplevel_bindings_p ())
4120 TREE_STATIC (decl) = 1;
4123 /* If this is a typedef that names the class for linkage purposes
4124 (7.1.3p8), apply any attributes directly to the type. */
4125 if (TREE_CODE (decl) == TYPE_DECL
4126 && TAGGED_TYPE_P (TREE_TYPE (decl))
4127 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4128 flags = ATTR_FLAG_TYPE_IN_PLACE;
4132 /* Set attributes here so if duplicate decl, will have proper attributes. */
4133 cplus_decl_attributes (&decl, attributes, flags);
4135 /* Dllimported symbols cannot be defined. Static data members (which
4136 can be initialized in-class and dllimported) go through grokfield,
4137 not here, so we don't need to exclude those decls when checking for
4139 if (initialized && DECL_DLLIMPORT_P (decl))
4141 error ("definition of %q#D is marked %<dllimport%>", decl);
4142 DECL_DLLIMPORT_P (decl) = 0;
4145 /* If #pragma weak was used, mark the decl weak now. */
4146 maybe_apply_pragma_weak (decl);
4148 if (TREE_CODE (decl) == FUNCTION_DECL
4149 && DECL_DECLARED_INLINE_P (decl)
4150 && DECL_UNINLINABLE (decl)
4151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4152 warning (0, "inline function %q+D given attribute noinline", decl);
4154 if (context && COMPLETE_TYPE_P (complete_type (context)))
4156 if (TREE_CODE (decl) == VAR_DECL)
4158 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4159 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4160 error ("%q#D is not a static member of %q#T", decl, context);
4163 if (DECL_CONTEXT (field) != context)
4165 if (!same_type_p (DECL_CONTEXT (field), context))
4166 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4167 "to be defined as %<%T::%D%>",
4168 DECL_CONTEXT (field), DECL_NAME (decl),
4169 context, DECL_NAME (decl));
4170 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4172 if (processing_specialization
4173 && template_class_depth (context) == 0
4174 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4175 error ("template header not allowed in member definition "
4176 "of explicitly specialized class");
4177 /* Static data member are tricky; an in-class initialization
4178 still doesn't provide a definition, so the in-class
4179 declaration will have DECL_EXTERNAL set, but will have an
4180 initialization. Thus, duplicate_decls won't warn
4181 about this situation, and so we check here. */
4182 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4183 error ("duplicate initialization of %qD", decl);
4184 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4186 if (declspecs->specs[(int) ds_constexpr]
4187 && !DECL_DECLARED_CONSTEXPR_P (field))
4188 error ("%qD declared %<constexpr%> outside its class", field);
4193 tree field = check_classfn (context, decl,
4194 (processing_template_decl
4195 > template_class_depth (context))
4196 ? current_template_parms
4198 if (field && field != error_mark_node
4199 && duplicate_decls (decl, field,
4200 /*newdecl_is_friend=*/false))
4204 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4205 DECL_IN_AGGR_P (decl) = 0;
4206 /* Do not mark DECL as an explicit specialization if it was not
4207 already marked as an instantiation; a declaration should
4208 never be marked as a specialization unless we know what
4209 template is being specialized. */
4210 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4212 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4214 /* [temp.expl.spec] An explicit specialization of a static data
4215 member of a template is a definition if the declaration
4216 includes an initializer; otherwise, it is a declaration.
4218 We check for processing_specialization so this only applies
4219 to the new specialization syntax. */
4220 if (!initialized && processing_specialization)
4221 DECL_EXTERNAL (decl) = 1;
4224 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4225 permerror (input_location, "declaration of %q#D outside of class is not definition",
4228 if (!ensure_literal_type_for_constexpr_object (decl))
4229 return error_mark_node;
4232 was_public = TREE_PUBLIC (decl);
4234 /* Enter this declaration into the symbol table. */
4235 decl = maybe_push_decl (decl);
4237 if (processing_template_decl)
4238 decl = push_template_decl (decl);
4239 if (decl == error_mark_node)
4240 return error_mark_node;
4242 /* Tell the back end to use or not use .common as appropriate. If we say
4243 -fconserve-space, we want this to save .data space, at the expense of
4244 wrong semantics. If we say -fno-conserve-space, we want this to
4245 produce errors about redefs; to do this we force variables into the
4247 if (flag_conserve_space
4248 && TREE_CODE (decl) == VAR_DECL
4249 && TREE_PUBLIC (decl)
4250 && !DECL_THREAD_LOCAL_P (decl)
4251 && !have_global_bss_p ())
4252 DECL_COMMON (decl) = 1;
4254 if (TREE_CODE (decl) == VAR_DECL
4255 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4256 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4258 /* This is a const variable with implicit 'static'. Set
4259 DECL_THIS_STATIC so we can tell it from variables that are
4260 !TREE_PUBLIC because of the anonymous namespace. */
4261 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4262 DECL_THIS_STATIC (decl) = 1;
4265 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4266 start_decl_1 (decl, initialized);
4271 /* Process the declaration of a variable DECL. INITIALIZED is true
4272 iff DECL is explicitly initialized. (INITIALIZED is false if the
4273 variable is initialized via an implicitly-called constructor.)
4274 This function must be called for ordinary variables (including, for
4275 example, implicit instantiations of templates), but must not be
4276 called for template declarations. */
4279 start_decl_1 (tree decl, bool initialized)
4283 bool aggregate_definition_p;
4285 gcc_assert (!processing_template_decl);
4287 if (error_operand_p (decl))
4290 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4292 type = TREE_TYPE (decl);
4293 complete_p = COMPLETE_TYPE_P (type);
4294 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4296 /* If an explicit initializer is present, or if this is a definition
4297 of an aggregate, then we need a complete type at this point.
4298 (Scalars are always complete types, so there is nothing to
4299 check.) This code just sets COMPLETE_P; errors (if necessary)
4300 are issued below. */
4301 if ((initialized || aggregate_definition_p)
4303 && COMPLETE_TYPE_P (complete_type (type)))
4306 /* We will not yet have set TREE_READONLY on DECL if the type
4307 was "const", but incomplete, before this point. But, now, we
4308 have a complete type, so we can try again. */
4309 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4313 /* Is it valid for this decl to have an initializer at all? */
4315 /* Don't allow initializations for incomplete types except for
4316 arrays which might be completed by the initialization. */
4318 ; /* A complete type is ok. */
4319 else if (type_uses_auto (type))
4320 ; /* An auto type is ok. */
4321 else if (TREE_CODE (type) != ARRAY_TYPE)
4323 error ("variable %q#D has initializer but incomplete type", decl);
4324 type = TREE_TYPE (decl) = error_mark_node;
4326 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4328 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4329 error ("elements of array %q#D have incomplete type", decl);
4330 /* else we already gave an error in start_decl. */
4333 else if (aggregate_definition_p && !complete_p)
4335 if (type_uses_auto (type))
4336 error ("declaration of %q#D has no initializer", decl);
4338 error ("aggregate %q#D has incomplete type and cannot be defined",
4340 /* Change the type so that assemble_variable will give
4341 DECL an rtl we can live with: (mem (const_int 0)). */
4342 type = TREE_TYPE (decl) = error_mark_node;
4345 /* Create a new scope to hold this declaration if necessary.
4346 Whether or not a new scope is necessary cannot be determined
4347 until after the type has been completed; if the type is a
4348 specialization of a class template it is not until after
4349 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4350 will be set correctly. */
4351 maybe_push_cleanup_level (type);
4354 /* Handle initialization of references. DECL, TYPE, and INIT have the
4355 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4356 but will be set to a new CLEANUP_STMT if a temporary is created
4357 that must be destroyed subsequently.
4359 Returns an initializer expression to use to initialize DECL, or
4360 NULL if the initialization can be performed statically.
4362 Quotes on semantics can be found in ARM 8.4.3. */
4365 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4369 if (init == NULL_TREE)
4371 if ((DECL_LANG_SPECIFIC (decl) == 0
4372 || DECL_IN_AGGR_P (decl) == 0)
4373 && ! DECL_THIS_EXTERN (decl))
4374 error ("%qD declared as reference but not initialized", decl);
4378 if (TREE_CODE (init) == TREE_LIST)
4379 init = build_x_compound_expr_from_list (init, "initializer");
4381 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4382 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4383 /* Note: default conversion is only called in very special cases. */
4384 init = decay_conversion (init);
4386 /* Convert INIT to the reference type TYPE. This may involve the
4387 creation of a temporary, whose lifetime must be the same as that
4388 of the reference. If so, a DECL_EXPR for the temporary will be
4389 added just after the DECL_EXPR for DECL. That's why we don't set
4390 DECL_INITIAL for local references (instead assigning to them
4391 explicitly); we need to allow the temporary to be initialized
4393 tmp = initialize_reference (type, init, decl, cleanup);
4395 if (tmp == error_mark_node)
4397 else if (tmp == NULL_TREE)
4399 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4403 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4406 DECL_INITIAL (decl) = tmp;
4411 /* Subroutine of check_initializer. We're initializing a DECL of
4412 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4413 extend the lifetime of the underlying array to match that of the decl,
4414 just like for reference initialization. CLEANUP is as for
4415 grok_reference_init. */
4418 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4420 tree aggr_init, array, arrtype;
4421 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4422 if (error_operand_p (init))
4423 return error_mark_node;
4425 aggr_init = TARGET_EXPR_INITIAL (init);
4426 init = build2 (INIT_EXPR, type, decl, init);
4428 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4429 arrtype = TREE_TYPE (array);
4431 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4432 array = TREE_OPERAND (array, 0);
4433 /* If the array is constant, finish_compound_literal already made it a
4434 static variable and we don't need to do anything here. */
4435 if (decl && TREE_CODE (array) == TARGET_EXPR)
4438 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4439 var = build_address (var);
4440 var = convert (arrtype, var);
4441 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4442 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4447 /* Designated initializers in arrays are not supported in GNU C++.
4448 The parser cannot detect this error since it does not know whether
4449 a given brace-enclosed initializer is for a class type or for an
4450 array. This function checks that CE does not use a designated
4451 initializer. If it does, an error is issued. Returns true if CE
4452 is valid, i.e., does not have a designated initializer. */
4455 check_array_designated_initializer (const constructor_elt *ce)
4457 /* Designated initializers for array elements are not supported. */
4460 /* The parser only allows identifiers as designated
4462 if (ce->index == error_mark_node)
4463 error ("name used in a GNU-style designated "
4464 "initializer for an array");
4467 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4468 error ("name %qD used in a GNU-style designated "
4469 "initializer for an array", ce->index);
4477 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4478 array until we finish parsing the initializer. If that's the
4479 situation we're in, update DECL accordingly. */
4482 maybe_deduce_size_from_array_init (tree decl, tree init)
4484 tree type = TREE_TYPE (decl);
4486 if (TREE_CODE (type) == ARRAY_TYPE
4487 && TYPE_DOMAIN (type) == NULL_TREE
4488 && TREE_CODE (decl) != TYPE_DECL)
4490 /* do_default is really a C-ism to deal with tentative definitions.
4491 But let's leave it here to ease the eventual merge. */
4492 int do_default = !DECL_EXTERNAL (decl);
4493 tree initializer = init ? init : DECL_INITIAL (decl);
4496 /* Check that there are no designated initializers in INIT, as
4497 those are not supported in GNU C++, and as the middle-end
4498 will crash if presented with a non-numeric designated
4500 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4502 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4503 constructor_elt *ce;
4506 VEC_iterate (constructor_elt, v, i, ce);
4508 if (!check_array_designated_initializer (ce))
4514 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4518 error ("initializer fails to determine size of %qD", decl);
4519 TREE_TYPE (decl) = error_mark_node;
4521 else if (failure == 2)
4525 error ("array size missing in %qD", decl);
4526 TREE_TYPE (decl) = error_mark_node;
4528 /* If a `static' var's size isn't known, make it extern as
4529 well as static, so it does not get allocated. If it's not
4530 `static', then don't mark it extern; finish_incomplete_decl
4531 will give it a default size and it will get allocated. */
4532 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4533 DECL_EXTERNAL (decl) = 1;
4535 else if (failure == 3)
4537 error ("zero-size array %qD", decl);
4538 TREE_TYPE (decl) = error_mark_node;
4542 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4544 relayout_decl (decl);
4548 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4549 any appropriate error messages regarding the layout. */
4552 layout_var_decl (tree decl)
4556 type = TREE_TYPE (decl);
4557 if (type == error_mark_node)
4560 /* If we haven't already layed out this declaration, do so now.
4561 Note that we must not call complete type for an external object
4562 because it's type might involve templates that we are not
4563 supposed to instantiate yet. (And it's perfectly valid to say
4564 `extern X x' for some incomplete type `X'.) */
4565 if (!DECL_EXTERNAL (decl))
4566 complete_type (type);
4567 if (!DECL_SIZE (decl)
4568 && TREE_TYPE (decl) != error_mark_node
4569 && (COMPLETE_TYPE_P (type)
4570 || (TREE_CODE (type) == ARRAY_TYPE
4571 && !TYPE_DOMAIN (type)
4572 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4573 layout_decl (decl, 0);
4575 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4577 /* An automatic variable with an incomplete type: that is an error.
4578 Don't talk about array types here, since we took care of that
4579 message in grokdeclarator. */
4580 error ("storage size of %qD isn't known", decl);
4581 TREE_TYPE (decl) = error_mark_node;
4584 /* Keep this code around in case we later want to control debug info
4585 based on whether a type is "used". (jason 1999-11-11) */
4587 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4588 /* Let debugger know it should output info for this type. */
4589 note_debug_info_needed (ttype);
4591 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4592 note_debug_info_needed (DECL_CONTEXT (decl));
4595 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4596 && DECL_SIZE (decl) != NULL_TREE
4597 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4599 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4600 constant_expression_warning (DECL_SIZE (decl));
4603 error ("storage size of %qD isn't constant", decl);
4604 TREE_TYPE (decl) = error_mark_node;
4609 /* If a local static variable is declared in an inline function, or if
4610 we have a weak definition, we must endeavor to create only one
4611 instance of the variable at link-time. */
4614 maybe_commonize_var (tree decl)
4616 /* Static data in a function with comdat linkage also has comdat
4618 if (TREE_STATIC (decl)
4619 /* Don't mess with __FUNCTION__. */
4620 && ! DECL_ARTIFICIAL (decl)
4621 && DECL_FUNCTION_SCOPE_P (decl)
4622 && vague_linkage_fn_p (DECL_CONTEXT (decl)))
4626 /* With weak symbols, we simply make the variable COMDAT;
4627 that will cause copies in multiple translations units to
4629 comdat_linkage (decl);
4633 if (DECL_INITIAL (decl) == NULL_TREE
4634 || DECL_INITIAL (decl) == error_mark_node)
4636 /* Without weak symbols, we can use COMMON to merge
4637 uninitialized variables. */
4638 TREE_PUBLIC (decl) = 1;
4639 DECL_COMMON (decl) = 1;
4643 /* While for initialized variables, we must use internal
4644 linkage -- which means that multiple copies will not
4646 TREE_PUBLIC (decl) = 0;
4647 DECL_COMMON (decl) = 0;
4648 warning_at (input_location, 0,
4649 "sorry: semantics of inline function static "
4650 "data %q+#D are wrong (you'll wind up "
4651 "with multiple copies)", decl);
4652 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4653 " you can work around this by removing "
4658 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4659 /* Set it up again; we might have set DECL_INITIAL since the last
4661 comdat_linkage (decl);
4664 /* Issue an error message if DECL is an uninitialized const variable. */
4667 check_for_uninitialized_const_var (tree decl)
4669 tree type = TREE_TYPE (decl);
4671 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4672 && DECL_INITIAL (decl) == NULL)
4673 error ("missing initializer for constexpr %qD", decl);
4675 /* ``Unless explicitly declared extern, a const object does not have
4676 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4678 else if (TREE_CODE (decl) == VAR_DECL
4679 && TREE_CODE (type) != REFERENCE_TYPE
4680 && CP_TYPE_CONST_P (type)
4681 && !TYPE_NEEDS_CONSTRUCTING (type)
4682 && !DECL_INITIAL (decl))
4683 error ("uninitialized const %qD", decl);
4687 /* Structure holding the current initializer being processed by reshape_init.
4688 CUR is a pointer to the current element being processed, END is a pointer
4689 after the last element present in the initializer. */
4690 typedef struct reshape_iterator_t
4692 constructor_elt *cur;
4693 constructor_elt *end;
4696 static tree reshape_init_r (tree, reshape_iter *, bool);
4698 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4699 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4700 initialized. If there are no more such fields, the return value
4704 next_initializable_field (tree field)
4707 && (TREE_CODE (field) != FIELD_DECL
4708 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4709 || DECL_ARTIFICIAL (field)))
4710 field = TREE_CHAIN (field);
4715 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4716 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4717 INTEGER_CST representing the size of the array minus one (the maximum index),
4718 or NULL_TREE if the array was declared without specifying the size. D is
4719 the iterator within the constructor. */
4722 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4725 bool sized_array_p = (max_index != NULL_TREE);
4726 unsigned HOST_WIDE_INT max_index_cst = 0;
4727 unsigned HOST_WIDE_INT index;
4729 /* The initializer for an array is always a CONSTRUCTOR. */
4730 new_init = build_constructor (init_list_type_node, NULL);
4734 /* Minus 1 is used for zero sized arrays. */
4735 if (integer_all_onesp (max_index))
4738 if (host_integerp (max_index, 1))
4739 max_index_cst = tree_low_cst (max_index, 1);
4740 /* sizetype is sign extended, not zero extended. */
4742 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4746 /* Loop until there are no more initializers. */
4748 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4753 check_array_designated_initializer (d->cur);
4754 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4755 if (elt_init == error_mark_node)
4756 return error_mark_node;
4757 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4763 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4764 Parameters are the same of reshape_init_r. */
4767 reshape_init_array (tree type, reshape_iter *d)
4769 tree max_index = NULL_TREE;
4771 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4773 if (TYPE_DOMAIN (type))
4774 max_index = array_type_nelts (type);
4776 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4779 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4780 Parameters are the same of reshape_init_r. */
4783 reshape_init_vector (tree type, reshape_iter *d)
4785 tree max_index = NULL_TREE;
4788 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4790 if (COMPOUND_LITERAL_P (d->cur->value))
4792 tree value = d->cur->value;
4793 if (!same_type_p (TREE_TYPE (value), type))
4795 error ("invalid type %qT as initializer for a vector of type %qT",
4796 TREE_TYPE (d->cur->value), type);
4797 value = error_mark_node;
4803 /* For a vector, the representation type is a struct
4804 containing a single member which is an array of the
4805 appropriate size. */
4806 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4807 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4808 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4810 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4813 /* Subroutine of reshape_init_r, processes the initializers for classes
4814 or union. Parameters are the same of reshape_init_r. */
4817 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4822 gcc_assert (CLASS_TYPE_P (type));
4824 /* The initializer for a class is always a CONSTRUCTOR. */
4825 new_init = build_constructor (init_list_type_node, NULL);
4826 field = next_initializable_field (TYPE_FIELDS (type));
4832 An initializer for an aggregate member that is an
4833 empty class shall have the form of an empty
4834 initializer-list {}. */
4835 if (!first_initializer_p)
4837 error ("initializer for %qT must be brace-enclosed", type);
4838 return error_mark_node;
4843 /* Loop through the initializable fields, gathering initializers. */
4844 while (d->cur != d->end)
4848 /* Handle designated initializers, as an extension. */
4851 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4853 if (!field || TREE_CODE (field) != FIELD_DECL)
4855 error ("%qT has no non-static data member named %qD", type,
4857 return error_mark_node;
4861 /* If we processed all the member of the class, we are done. */
4865 field_init = reshape_init_r (TREE_TYPE (field), d,
4866 /*first_initializer_p=*/false);
4867 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4871 When a union is initialized with a brace-enclosed
4872 initializer, the braces shall only contain an
4873 initializer for the first member of the union. */
4874 if (TREE_CODE (type) == UNION_TYPE)
4877 field = next_initializable_field (TREE_CHAIN (field));
4883 /* Subroutine of reshape_init, which processes a single initializer (part of
4884 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4885 iterator within the CONSTRUCTOR which points to the initializer to process.
4886 FIRST_INITIALIZER_P is true if this is the first initializer of the
4887 outermost CONSTRUCTOR node. */
4890 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4892 tree init = d->cur->value;
4894 if (error_operand_p (init))
4895 return error_mark_node;
4897 /* A non-aggregate type is always initialized with a single
4899 if (!CP_AGGREGATE_TYPE_P (type))
4901 /* It is invalid to initialize a non-aggregate type with a
4902 brace-enclosed initializer before C++0x.
4903 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4904 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4905 a CONSTRUCTOR (with a record type). */
4906 if (TREE_CODE (init) == CONSTRUCTOR
4907 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4909 if (SCALAR_TYPE_P (type))
4911 error ("braces around scalar initializer for type %qT", type);
4912 init = error_mark_node;
4915 maybe_warn_cpp0x ("extended initializer lists");
4924 All implicit type conversions (clause _conv_) are considered when
4925 initializing the aggregate member with an initializer from an
4926 initializer-list. If the initializer can initialize a member,
4927 the member is initialized. Otherwise, if the member is itself a
4928 non-empty subaggregate, brace elision is assumed and the
4929 initializer is considered for the initialization of the first
4930 member of the subaggregate. */
4931 if (TREE_CODE (init) != CONSTRUCTOR
4932 /* But don't try this for the first initializer, since that would be
4933 looking through the outermost braces; A a2 = { a1 }; is not a
4934 valid aggregate initialization. */
4935 && !first_initializer_p
4936 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
4937 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
4943 /* [dcl.init.string]
4945 A char array (whether plain char, signed char, or unsigned char)
4946 can be initialized by a string-literal (optionally enclosed in
4947 braces); a wchar_t array can be initialized by a wide
4948 string-literal (optionally enclosed in braces). */
4949 if (TREE_CODE (type) == ARRAY_TYPE
4950 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4952 tree str_init = init;
4954 /* Strip one level of braces if and only if they enclose a single
4955 element (as allowed by [dcl.init.string]). */
4956 if (!first_initializer_p
4957 && TREE_CODE (str_init) == CONSTRUCTOR
4958 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4960 str_init = VEC_index (constructor_elt,
4961 CONSTRUCTOR_ELTS (str_init), 0)->value;
4964 /* If it's a string literal, then it's the initializer for the array
4965 as a whole. Otherwise, continue with normal initialization for
4966 array types (one value per array element). */
4967 if (TREE_CODE (str_init) == STRING_CST)
4974 /* The following cases are about aggregates. If we are not within a full
4975 initializer already, and there is not a CONSTRUCTOR, it means that there
4976 is a missing set of braces (that is, we are processing the case for
4977 which reshape_init exists). */
4978 if (!first_initializer_p)
4980 if (TREE_CODE (init) == CONSTRUCTOR)
4982 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4983 /* There is no need to reshape pointer-to-member function
4984 initializers, as they are always constructed correctly
4985 by the front end. */
4987 else if (COMPOUND_LITERAL_P (init))
4988 /* For a nested compound literal, there is no need to reshape since
4989 brace elision is not allowed. Even if we decided to allow it,
4990 we should add a call to reshape_init in finish_compound_literal,
4991 before calling digest_init, so changing this code would still
4992 not be necessary. */
4993 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4997 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4998 return reshape_init (type, init);
5002 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5006 /* Dispatch to specialized routines. */
5007 if (CLASS_TYPE_P (type))
5008 return reshape_init_class (type, d, first_initializer_p);
5009 else if (TREE_CODE (type) == ARRAY_TYPE)
5010 return reshape_init_array (type, d);
5011 else if (TREE_CODE (type) == VECTOR_TYPE)
5012 return reshape_init_vector (type, d);
5017 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5018 brace-enclosed aggregate initializer.
5020 INIT is the CONSTRUCTOR containing the list of initializers describing
5021 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5022 It may not presently match the shape of the TYPE; for example:
5024 struct S { int a; int b; };
5025 struct S a[] = { 1, 2, 3, 4 };
5027 Here INIT will hold a VEC of four elements, rather than a
5028 VEC of two elements, each itself a VEC of two elements. This
5029 routine transforms INIT from the former form into the latter. The
5030 revised CONSTRUCTOR node is returned. */
5033 reshape_init (tree type, tree init)
5035 VEC(constructor_elt, gc) *v;
5039 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5041 v = CONSTRUCTOR_ELTS (init);
5043 /* An empty constructor does not need reshaping, and it is always a valid
5045 if (VEC_empty (constructor_elt, v))
5048 /* Recurse on this CONSTRUCTOR. */
5049 d.cur = VEC_index (constructor_elt, v, 0);
5050 d.end = d.cur + VEC_length (constructor_elt, v);
5052 new_init = reshape_init_r (type, &d, true);
5053 if (new_init == error_mark_node)
5054 return error_mark_node;
5056 /* Make sure all the element of the constructor were used. Otherwise,
5057 issue an error about exceeding initializers. */
5059 error ("too many initializers for %qT", type);
5064 /* Verify array initializer. Returns true if errors have been reported. */
5067 check_array_initializer (tree decl, tree type, tree init)
5069 tree element_type = TREE_TYPE (type);
5071 /* The array type itself need not be complete, because the
5072 initializer may tell us how many elements are in the array.
5073 But, the elements of the array must be complete. */
5074 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5077 error ("elements of array %q#D have incomplete type", decl);
5079 error ("elements of array %q#T have incomplete type", type);
5082 /* It is not valid to initialize a VLA. */
5084 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5085 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5088 error ("variable-sized object %qD may not be initialized", decl);
5090 error ("variable-sized compound literal");
5096 /* Subroutine of check_initializer; args are passed down from that function.
5097 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5100 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5103 int saved_stmts_are_full_exprs_p = 0;
5104 if (building_stmt_tree ())
5106 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5107 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5109 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5110 if (building_stmt_tree ())
5111 current_stmt_tree ()->stmts_are_full_exprs_p =
5112 saved_stmts_are_full_exprs_p;
5116 /* Verify INIT (the initializer for DECL), and record the
5117 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5118 grok_reference_init.
5120 If the return value is non-NULL, it is an expression that must be
5121 evaluated dynamically to initialize DECL. */
5124 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5126 tree type = TREE_TYPE (decl);
5127 tree init_code = NULL;
5129 /* Things that are going to be initialized need to have complete
5131 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5133 if (type == error_mark_node)
5134 /* We will have already complained. */
5137 if (TREE_CODE (type) == ARRAY_TYPE)
5139 if (check_array_initializer (decl, type, init))
5142 else if (!COMPLETE_TYPE_P (type))
5144 error ("%qD has incomplete type", decl);
5145 TREE_TYPE (decl) = error_mark_node;
5149 /* There is no way to make a variable-sized class type in GNU C++. */
5150 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5152 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5154 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5155 if (SCALAR_TYPE_P (type))
5159 maybe_warn_cpp0x ("extended initializer lists");
5160 init = build_zero_init (type, NULL_TREE, false);
5162 else if (init_len != 1)
5164 error ("scalar object %qD requires one element in initializer",
5166 TREE_TYPE (decl) = error_mark_node;
5172 if (TREE_CODE (decl) == CONST_DECL)
5174 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5176 DECL_INITIAL (decl) = init;
5178 gcc_assert (init != NULL_TREE);
5181 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5182 init = grok_reference_init (decl, type, init, cleanup);
5185 /* Do not reshape constructors of vectors (they don't need to be
5187 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5189 if (is_std_init_list (type))
5190 return build_init_list_var_init (decl, type, init, cleanup);
5191 else if (TYPE_NON_AGGREGATE_CLASS (type))
5193 /* Don't reshape if the class has constructors. */
5194 if (cxx_dialect == cxx98)
5195 error ("in C++98 %qD must be initialized by constructor, "
5198 init = build_tree_list (NULL_TREE, init);
5200 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5202 error ("opaque vector types cannot be initialized");
5203 init = error_mark_node;
5206 init = reshape_init (type, init);
5209 /* If DECL has an array type without a specific bound, deduce the
5210 array size from the initializer. */
5211 maybe_deduce_size_from_array_init (decl, init);
5212 type = TREE_TYPE (decl);
5213 if (type == error_mark_node)
5216 if (TYPE_NEEDS_CONSTRUCTING (type)
5217 || (CLASS_TYPE_P (type)
5218 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5219 return build_aggr_init_full_exprs (decl, init, flags);
5220 else if (TREE_CODE (init) != TREE_VEC)
5222 init_code = store_init_value (decl, init, flags);
5223 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5224 && DECL_INITIAL (decl)
5225 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5226 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5227 warning (0, "array %qD initialized by parenthesized string literal %qE",
5228 decl, DECL_INITIAL (decl));
5232 else if (DECL_EXTERNAL (decl))
5234 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5235 return build_aggr_init_full_exprs (decl, init, flags);
5236 else if (MAYBE_CLASS_TYPE_P (type))
5238 tree core_type = strip_array_types (type);
5240 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5241 error ("structure %qD with uninitialized const members", decl);
5242 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5243 error ("structure %qD with uninitialized reference members", decl);
5245 check_for_uninitialized_const_var (decl);
5248 check_for_uninitialized_const_var (decl);
5250 if (init && init != error_mark_node)
5251 init_code = build2 (INIT_EXPR, type, decl, init);
5256 /* If DECL is not a local variable, give it RTL. */
5259 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5261 int toplev = toplevel_bindings_p ();
5263 const char *filename;
5265 /* Set the DECL_ASSEMBLER_NAME for the object. */
5268 /* The `register' keyword, when used together with an
5269 asm-specification, indicates that the variable should be
5270 placed in a particular register. */
5271 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5273 set_user_assembler_name (decl, asmspec);
5274 DECL_HARD_REGISTER (decl) = 1;
5278 if (TREE_CODE (decl) == FUNCTION_DECL
5279 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5280 set_builtin_user_assembler_name (decl, asmspec);
5281 set_user_assembler_name (decl, asmspec);
5285 /* Handle non-variables up front. */
5286 if (TREE_CODE (decl) != VAR_DECL)
5288 rest_of_decl_compilation (decl, toplev, at_eof);
5292 /* If we see a class member here, it should be a static data
5294 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5296 gcc_assert (TREE_STATIC (decl));
5297 /* An in-class declaration of a static data member should be
5298 external; it is only a declaration, and not a definition. */
5299 if (init == NULL_TREE)
5300 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5303 /* We don't create any RTL for local variables. */
5304 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5307 /* We defer emission of local statics until the corresponding
5308 DECL_EXPR is expanded. */
5309 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5311 /* We try to defer namespace-scope static constants so that they are
5312 not emitted into the object file unnecessarily. */
5313 filename = input_filename;
5314 if (!DECL_VIRTUAL_P (decl)
5315 && TREE_READONLY (decl)
5316 && DECL_INITIAL (decl) != NULL_TREE
5317 && DECL_INITIAL (decl) != error_mark_node
5319 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5321 && !TREE_PUBLIC (decl))
5323 /* Fool with the linkage of static consts according to #pragma
5325 struct c_fileinfo *finfo = get_fileinfo (filename);
5326 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5328 TREE_PUBLIC (decl) = 1;
5329 DECL_EXTERNAL (decl) = finfo->interface_only;
5334 /* Likewise for template instantiations. */
5335 else if (DECL_LANG_SPECIFIC (decl)
5336 && DECL_IMPLICIT_INSTANTIATION (decl))
5339 /* If we're not deferring, go ahead and assemble the variable. */
5341 rest_of_decl_compilation (decl, toplev, at_eof);
5344 /* walk_tree helper for wrap_temporary_cleanups, below. */
5347 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5349 if (TYPE_P (*stmt_p))
5355 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5357 tree guard = (tree)data;
5358 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5360 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5361 /* Tell honor_protect_cleanup_actions to handle this as a separate
5363 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5365 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5371 /* We're initializing a local variable which has a cleanup GUARD. If there
5372 are any temporaries used in the initializer INIT of this variable, we
5373 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5374 variable will be cleaned up properly if one of them throws.
5376 Unfortunately, there's no way to express this properly in terms of
5377 nesting, as the regions for the temporaries overlap the region for the
5378 variable itself; if there are two temporaries, the variable needs to be
5379 the first thing destroyed if either of them throws. However, we only
5380 want to run the variable's cleanup if it actually got constructed. So
5381 we need to guard the temporary cleanups with the variable's cleanup if
5382 they are run on the normal path, but not if they are run on the
5383 exceptional path. We implement this by telling
5384 honor_protect_cleanup_actions to strip the variable cleanup from the
5385 exceptional path. */
5388 wrap_temporary_cleanups (tree init, tree guard)
5390 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5393 /* Generate code to initialize DECL (a local variable). */
5396 initialize_local_var (tree decl, tree init)
5398 tree type = TREE_TYPE (decl);
5402 gcc_assert (TREE_CODE (decl) == VAR_DECL
5403 || TREE_CODE (decl) == RESULT_DECL);
5404 gcc_assert (!TREE_STATIC (decl));
5406 if (DECL_SIZE (decl) == NULL_TREE)
5408 /* If we used it already as memory, it must stay in memory. */
5409 DECL_INITIAL (decl) = NULL_TREE;
5410 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5414 if (type == error_mark_node)
5417 /* Compute and store the initial value. */
5418 already_used = TREE_USED (decl) || TREE_USED (type);
5420 /* Generate a cleanup, if necessary. */
5421 cleanup = cxx_maybe_build_cleanup (decl);
5423 /* Perform the initialization. */
5426 int saved_stmts_are_full_exprs_p;
5428 /* If we're only initializing a single object, guard the destructors
5429 of any temporaries used in its initializer with its destructor.
5430 This isn't right for arrays because each element initialization is
5431 a full-expression. */
5432 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5433 wrap_temporary_cleanups (init, cleanup);
5435 gcc_assert (building_stmt_tree ());
5436 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5437 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5438 finish_expr_stmt (init);
5439 current_stmt_tree ()->stmts_are_full_exprs_p =
5440 saved_stmts_are_full_exprs_p;
5443 /* Set this to 0 so we can tell whether an aggregate which was
5444 initialized was ever used. Don't do this if it has a
5445 destructor, so we don't complain about the 'resource
5446 allocation is initialization' idiom. Now set
5447 attribute((unused)) on types so decls of that type will be
5448 marked used. (see TREE_USED, above.) */
5449 if (TYPE_NEEDS_CONSTRUCTING (type)
5451 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5452 && DECL_NAME (decl))
5453 TREE_USED (decl) = 0;
5454 else if (already_used)
5455 TREE_USED (decl) = 1;
5458 finish_decl_cleanup (decl, cleanup);
5461 /* DECL is a VAR_DECL for a compiler-generated variable with static
5462 storage duration (like a virtual table) whose initializer is a
5463 compile-time constant. INIT must be either a TREE_LIST of values,
5464 or a CONSTRUCTOR. Initialize the variable and provide it to the
5468 initialize_artificial_var (tree decl, tree init)
5470 gcc_assert (DECL_ARTIFICIAL (decl));
5471 if (TREE_CODE (init) == TREE_LIST)
5472 init = build_constructor_from_list (TREE_TYPE (decl), init);
5473 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5474 DECL_INITIAL (decl) = init;
5475 DECL_INITIALIZED_P (decl) = 1;
5476 determine_visibility (decl);
5477 layout_var_decl (decl);
5478 maybe_commonize_var (decl);
5479 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5482 /* INIT is the initializer for a variable, as represented by the
5483 parser. Returns true iff INIT is value-dependent. */
5486 value_dependent_init_p (tree init)
5488 if (TREE_CODE (init) == TREE_LIST)
5489 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5490 return any_value_dependent_elements_p (init);
5491 else if (TREE_CODE (init) == CONSTRUCTOR)
5492 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5494 VEC(constructor_elt, gc) *elts;
5498 elts = CONSTRUCTOR_ELTS (init);
5499 nelts = VEC_length (constructor_elt, elts);
5500 for (i = 0; i < nelts; ++i)
5501 if (value_dependent_init_p (VEC_index (constructor_elt,
5506 /* It must be a simple expression, e.g., int i = 3; */
5507 return value_dependent_expression_p (init);
5512 /* Finish processing of a declaration;
5513 install its line number and initial value.
5514 If the length of an array type is not known before,
5515 it must be determined now, from the initial value, or it is an error.
5517 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5518 true, then INIT is an integral constant expression.
5520 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5521 if the (init) syntax was used. */
5524 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5525 tree asmspec_tree, int flags)
5529 const char *asmspec = NULL;
5530 int was_readonly = 0;
5531 bool var_definition_p = false;
5532 int saved_processing_template_decl;
5535 if (decl == error_mark_node)
5540 error ("assignment (not initialization) in declaration");
5544 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5545 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5546 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5548 type = TREE_TYPE (decl);
5549 if (type == error_mark_node)
5552 /* Assume no cleanup is required. */
5553 cleanup = NULL_TREE;
5554 saved_processing_template_decl = processing_template_decl;
5556 /* If a name was specified, get the string. */
5557 if (global_scope_p (current_binding_level))
5558 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5559 if (asmspec_tree && asmspec_tree != error_mark_node)
5560 asmspec = TREE_STRING_POINTER (asmspec_tree);
5562 if (current_class_type
5563 && CP_DECL_CONTEXT (decl) == current_class_type
5564 && TYPE_BEING_DEFINED (current_class_type)
5565 && (DECL_INITIAL (decl) || init))
5566 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5568 auto_node = type_uses_auto (type);
5571 if (init == NULL_TREE)
5573 error ("declaration of %q#D has no initializer", decl);
5574 TREE_TYPE (decl) = error_mark_node;
5577 if (TREE_CODE (init) == TREE_LIST)
5578 init = build_x_compound_expr_from_list (init, "initializer");
5579 if (describable_type (init))
5581 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5582 if (type == error_mark_node)
5587 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5589 if (init == ridpointers[(int)RID_DELETE])
5591 /* FIXME check this is 1st decl. */
5592 DECL_DELETED_FN (decl) = 1;
5593 DECL_DECLARED_INLINE_P (decl) = 1;
5594 DECL_INITIAL (decl) = error_mark_node;
5597 else if (init == ridpointers[(int)RID_DEFAULT])
5599 if (!defaultable_fn_p (decl))
5601 error ("%qD cannot be defaulted", decl);
5602 DECL_INITIAL (decl) = NULL_TREE;
5605 DECL_DEFAULTED_FN (decl) = 1;
5609 if (processing_template_decl)
5611 bool type_dependent_p;
5613 /* Add this declaration to the statement-tree. */
5614 if (at_function_scope_p ())
5615 add_decl_expr (decl);
5617 type_dependent_p = dependent_type_p (type);
5619 if (check_for_bare_parameter_packs (init))
5622 DECL_INITIAL (decl) = NULL_TREE;
5625 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5627 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5628 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5629 TREE_CONSTANT (decl) = 1;
5632 /* Generally, initializers in templates are expanded when the
5633 template is instantiated. But, if DECL is an integral
5634 constant static data member, then it can be used in future
5635 integral constant expressions, and its value must be
5638 && DECL_CLASS_SCOPE_P (decl)
5639 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5640 && !type_dependent_p
5641 && !value_dependent_init_p (init)))
5644 DECL_INITIAL (decl) = init;
5645 if (TREE_CODE (decl) == VAR_DECL
5646 && !DECL_PRETTY_FUNCTION_P (decl)
5647 && !type_dependent_p)
5648 maybe_deduce_size_from_array_init (decl, init);
5652 if (TREE_CODE (init) == TREE_LIST)
5654 /* If the parenthesized-initializer form was used (e.g.,
5655 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5656 arguments. (There is generally only one.) We convert them
5659 for (; list; list = TREE_CHAIN (list))
5661 tree elt = TREE_VALUE (list);
5662 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5666 init = fold_non_dependent_expr (init);
5667 processing_template_decl = 0;
5670 /* Take care of TYPE_DECLs up front. */
5671 if (TREE_CODE (decl) == TYPE_DECL)
5673 if (type != error_mark_node
5674 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5676 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5677 warning (0, "shadowing previous type declaration of %q#D", decl);
5678 set_identifier_type_value (DECL_NAME (decl), decl);
5681 /* If we have installed this as the canonical typedef for this
5682 type, and that type has not been defined yet, delay emitting
5683 the debug information for it, as we will emit it later. */
5684 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5685 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5686 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5688 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5693 /* A reference will be modified here, as it is initialized. */
5694 if (! DECL_EXTERNAL (decl)
5695 && TREE_READONLY (decl)
5696 && TREE_CODE (type) == REFERENCE_TYPE)
5699 TREE_READONLY (decl) = 0;
5702 if (TREE_CODE (decl) == VAR_DECL)
5704 /* Only variables with trivial initialization and destruction can
5705 have thread-local storage. */
5706 if (DECL_THREAD_LOCAL_P (decl)
5707 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5708 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5709 error ("%qD cannot be thread-local because it has non-trivial "
5710 "type %qT", decl, TREE_TYPE (decl));
5711 /* If this is a local variable that will need a mangled name,
5712 register it now. We must do this before processing the
5713 initializer for the variable, since the initialization might
5714 require a guard variable, and since the mangled name of the
5715 guard variable will depend on the mangled name of this
5717 if (DECL_FUNCTION_SCOPE_P (decl)
5718 && TREE_STATIC (decl)
5719 && !DECL_ARTIFICIAL (decl))
5720 push_local_name (decl);
5721 /* Convert the initializer to the type of DECL, if we have not
5722 already initialized DECL. */
5723 if (!DECL_INITIALIZED_P (decl)
5724 /* If !DECL_EXTERNAL then DECL is being defined. In the
5725 case of a static data member initialized inside the
5726 class-specifier, there can be an initializer even if DECL
5727 is *not* defined. */
5728 && (!DECL_EXTERNAL (decl) || init))
5730 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5733 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5734 /* Allow libjava/prims.cc define primitive classes. */
5735 if (init != NULL_TREE
5736 || jclass == NULL_TREE
5737 || TREE_CODE (jclass) != TYPE_DECL
5738 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5739 || !same_type_ignoring_top_level_qualifiers_p
5740 (type, TREE_TYPE (TREE_TYPE (jclass))))
5741 error ("Java object %qD not allocated with %<new%>", decl);
5746 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5747 if (init_const_expr_p)
5749 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5750 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5751 TREE_CONSTANT (decl) = 1;
5754 init = check_initializer (decl, init, flags, &cleanup);
5755 /* Thread-local storage cannot be dynamically initialized. */
5756 if (DECL_THREAD_LOCAL_P (decl) && init)
5758 error ("%qD is thread-local and so cannot be dynamically "
5759 "initialized", decl);
5763 /* Check that the initializer for a static data member was a
5764 constant. Although we check in the parser that the
5765 initializer is an integral constant expression, we do not
5766 simplify division-by-zero at the point at which it
5767 occurs. Therefore, in:
5769 struct S { static const int i = 7 / 0; };
5771 we issue an error at this point. It would
5772 probably be better to forbid division by zero in
5773 integral constant expressions. */
5774 if (DECL_EXTERNAL (decl) && init)
5776 error ("%qD cannot be initialized by a non-constant expression"
5777 " when being declared", decl);
5778 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5786 The memory occupied by any object of static storage
5787 duration is zero-initialized at program startup before
5788 any other initialization takes place.
5790 We cannot create an appropriate initializer until after
5791 the type of DECL is finalized. If DECL_INITIAL is set,
5792 then the DECL is statically initialized, and any
5793 necessary zero-initialization has already been performed. */
5794 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5795 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5796 /*nelts=*/NULL_TREE,
5797 /*static_storage_p=*/true);
5798 /* Remember that the initialization for this variable has
5800 DECL_INITIALIZED_P (decl) = 1;
5801 /* This declaration is the definition of this variable,
5802 unless we are initializing a static data member within
5803 the class specifier. */
5804 if (!DECL_EXTERNAL (decl))
5805 var_definition_p = true;
5807 /* If the variable has an array type, lay out the type, even if
5808 there is no initializer. It is valid to index through the
5809 array, and we must get TYPE_ALIGN set correctly on the array
5811 else if (TREE_CODE (type) == ARRAY_TYPE)
5814 if (!processing_template_decl
5815 && TREE_STATIC (decl)
5816 && !at_function_scope_p ()
5817 && current_function_decl == NULL)
5818 /* So decl is a global variable or a static member of a
5819 non local class. Record the types it uses
5820 so that we can decide later to emit debug info for them. */
5821 record_types_used_by_current_var_decl (decl);
5823 else if (TREE_CODE (decl) == FIELD_DECL
5824 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5825 error ("non-static data member %qD has Java class type", decl);
5827 /* Add this declaration to the statement-tree. This needs to happen
5828 after the call to check_initializer so that the DECL_EXPR for a
5829 reference temp is added before the DECL_EXPR for the reference itself. */
5830 if (at_function_scope_p ())
5831 add_decl_expr (decl);
5833 /* Let the middle end know about variables and functions -- but not
5834 static data members in uninstantiated class templates. */
5835 if (!saved_processing_template_decl
5836 && (TREE_CODE (decl) == VAR_DECL
5837 || TREE_CODE (decl) == FUNCTION_DECL))
5839 if (TREE_CODE (decl) == VAR_DECL)
5841 layout_var_decl (decl);
5842 maybe_commonize_var (decl);
5845 /* This needs to happen after the linkage is set. */
5846 determine_visibility (decl);
5848 if (var_definition_p && TREE_STATIC (decl))
5850 /* If a TREE_READONLY variable needs initialization
5851 at runtime, it is no longer readonly and we need to
5852 avoid MEM_READONLY_P being set on RTL created for it. */
5855 if (TREE_READONLY (decl))
5856 TREE_READONLY (decl) = 0;
5859 else if (was_readonly)
5860 TREE_READONLY (decl) = 1;
5863 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5865 /* Check for abstractness of the type. Notice that there is no
5866 need to strip array types here since the check for those types
5867 is already done within create_array_type_for_decl. */
5868 if (TREE_CODE (type) == FUNCTION_TYPE
5869 || TREE_CODE (type) == METHOD_TYPE)
5870 abstract_virtuals_error (decl, TREE_TYPE (type));
5872 abstract_virtuals_error (decl, type);
5874 if (TREE_TYPE (decl) == error_mark_node)
5875 /* No initialization required. */
5877 else if (TREE_CODE (decl) == FUNCTION_DECL)
5881 if (init == ridpointers[(int)RID_DEFAULT])
5883 /* An out-of-class default definition is defined at
5884 the point where it is explicitly defaulted. */
5885 if (DECL_INITIAL (decl) == error_mark_node)
5886 synthesize_method (decl);
5889 error ("function %q#D is initialized like a variable", decl);
5891 /* else no initialization required. */
5893 else if (DECL_EXTERNAL (decl)
5894 && ! (DECL_LANG_SPECIFIC (decl)
5895 && DECL_NOT_REALLY_EXTERN (decl)))
5898 DECL_INITIAL (decl) = init;
5900 /* A variable definition. */
5901 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5902 /* Initialize the local variable. */
5903 initialize_local_var (decl, init);
5905 /* If a variable is defined, and then a subsequent
5906 definition with external linkage is encountered, we will
5907 get here twice for the same variable. We want to avoid
5908 calling expand_static_init more than once. For variables
5909 that are not static data members, we can call
5910 expand_static_init only when we actually process the
5911 initializer. It is not legal to redeclare a static data
5912 member, so this issue does not arise in that case. */
5913 else if (var_definition_p && TREE_STATIC (decl))
5914 expand_static_init (decl, init);
5917 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5918 reference, insert it in the statement-tree now. */
5920 push_cleanup (decl, cleanup, false);
5923 processing_template_decl = saved_processing_template_decl;
5926 TREE_READONLY (decl) = 1;
5928 /* If this was marked 'used', be sure it will be output. */
5929 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5930 mark_decl_referenced (decl);
5933 /* Returns a declaration for a VAR_DECL as if:
5935 extern "C" TYPE NAME;
5937 had been seen. Used to create compiler-generated global
5941 declare_global_var (tree name, tree type)
5945 push_to_top_level ();
5946 decl = build_decl (input_location, VAR_DECL, name, type);
5947 TREE_PUBLIC (decl) = 1;
5948 DECL_EXTERNAL (decl) = 1;
5949 DECL_ARTIFICIAL (decl) = 1;
5950 /* If the user has explicitly declared this variable (perhaps
5951 because the code we are compiling is part of a low-level runtime
5952 library), then it is possible that our declaration will be merged
5953 with theirs by pushdecl. */
5954 decl = pushdecl (decl);
5955 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5956 pop_from_top_level ();
5961 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5962 if "__cxa_atexit" is not being used) corresponding to the function
5963 to be called when the program exits. */
5966 get_atexit_fn_ptr_type (void)
5971 if (!atexit_fn_ptr_type_node)
5973 if (flag_use_cxa_atexit
5974 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5975 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5976 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5978 /* The parameter to "atexit" is "void (*)(void)". */
5979 arg_types = void_list_node;
5981 fn_type = build_function_type (void_type_node, arg_types);
5982 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5985 return atexit_fn_ptr_type_node;
5988 /* Returns a pointer to the `atexit' function. Note that if
5989 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5990 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5993 get_atexit_node (void)
6000 bool use_aeabi_atexit;
6005 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6007 /* The declaration for `__cxa_atexit' is:
6009 int __cxa_atexit (void (*)(void *), void *, void *)
6011 We build up the argument types and then then function type
6014 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6015 /* First, build the pointer-to-function type for the first
6017 fn_ptr_type = get_atexit_fn_ptr_type ();
6018 /* Then, build the rest of the argument types. */
6019 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6020 if (use_aeabi_atexit)
6022 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6023 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6027 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6028 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6030 /* And the final __cxa_atexit type. */
6031 fn_type = build_function_type (integer_type_node, arg_types);
6032 fn_ptr_type = build_pointer_type (fn_type);
6033 if (use_aeabi_atexit)
6034 name = "__aeabi_atexit";
6036 name = "__cxa_atexit";
6040 /* The declaration for `atexit' is:
6042 int atexit (void (*)());
6044 We build up the argument types and then then function type
6046 fn_ptr_type = get_atexit_fn_ptr_type ();
6047 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6048 /* Build the final atexit type. */
6049 fn_type = build_function_type (integer_type_node, arg_types);
6053 /* Now, build the function declaration. */
6054 push_lang_context (lang_name_c);
6055 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6056 mark_used (atexit_fndecl);
6057 pop_lang_context ();
6058 atexit_node = decay_conversion (atexit_fndecl);
6063 /* Returns the __dso_handle VAR_DECL. */
6066 get_dso_handle_node (void)
6068 if (dso_handle_node)
6069 return dso_handle_node;
6071 /* Declare the variable. */
6072 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6075 return dso_handle_node;
6078 /* Begin a new function with internal linkage whose job will be simply
6079 to destroy some particular variable. */
6081 static GTY(()) int start_cleanup_cnt;
6084 start_cleanup_fn (void)
6089 bool use_cxa_atexit = flag_use_cxa_atexit
6090 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6092 push_to_top_level ();
6094 /* No need to mangle this. */
6095 push_lang_context (lang_name_c);
6097 /* Build the name of the function. */
6098 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6099 /* Build the function declaration. */
6100 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6101 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6102 /* It's a function with internal linkage, generated by the
6104 TREE_PUBLIC (fndecl) = 0;
6105 DECL_ARTIFICIAL (fndecl) = 1;
6106 /* Make the function `inline' so that it is only emitted if it is
6107 actually needed. It is unlikely that it will be inlined, since
6108 it is only called via a function pointer, but we avoid unnecessary
6109 emissions this way. */
6110 DECL_DECLARED_INLINE_P (fndecl) = 1;
6111 DECL_INTERFACE_KNOWN (fndecl) = 1;
6112 /* Build the parameter. */
6117 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6118 DECL_CONTEXT (parmdecl) = fndecl;
6119 TREE_USED (parmdecl) = 1;
6120 DECL_ARGUMENTS (fndecl) = parmdecl;
6124 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6126 pop_lang_context ();
6128 return current_function_decl;
6131 /* Finish the cleanup function begun by start_cleanup_fn. */
6134 end_cleanup_fn (void)
6136 expand_or_defer_fn (finish_function (0));
6138 pop_from_top_level ();
6141 /* Generate code to handle the destruction of DECL, an object with
6142 static storage duration. */
6145 register_dtor_fn (tree decl)
6154 type = TREE_TYPE (decl);
6155 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6156 return void_zero_node;
6158 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6159 a class object, we can just pass the destructor to
6160 "__cxa_atexit"; we don't have to build a temporary function to do
6162 use_dtor = (flag_use_cxa_atexit
6163 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6164 && CLASS_TYPE_P (type));
6169 /* Find the destructor. */
6170 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6171 gcc_assert (idx >= 0);
6172 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6173 /* Make sure it is accessible. */
6174 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6178 /* Call build_cleanup before we enter the anonymous function so
6179 that any access checks will be done relative to the current
6180 scope, rather than the scope of the anonymous function. */
6181 build_cleanup (decl);
6183 /* Now start the function. */
6184 cleanup = start_cleanup_fn ();
6186 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6187 to the original function, rather than the anonymous one. That
6188 will make the back end think that nested functions are in use,
6189 which causes confusion. */
6190 push_deferring_access_checks (dk_no_check);
6191 fcall = build_cleanup (decl);
6192 pop_deferring_access_checks ();
6194 /* Create the body of the anonymous function. */
6195 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6196 finish_expr_stmt (fcall);
6197 finish_compound_stmt (compound_stmt);
6201 /* Call atexit with the cleanup function. */
6202 mark_used (cleanup);
6203 cleanup = build_address (cleanup);
6204 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6210 /* We must convert CLEANUP to the type that "__cxa_atexit"
6212 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6213 /* "__cxa_atexit" will pass the address of DECL to the
6214 cleanup function. */
6216 addr = build_address (decl);
6217 /* The declared type of the parameter to "__cxa_atexit" is
6218 "void *". For plain "T*", we could just let the
6219 machinery in cp_build_function_call convert it -- but if the
6220 type is "cv-qualified T *", then we need to convert it
6221 before passing it in, to avoid spurious errors. */
6222 addr = build_nop (ptr_type_node, addr);
6225 /* Since the cleanup functions we build ignore the address
6226 they're given, there's no reason to pass the actual address
6227 in, and, in general, it's cheaper to pass NULL than any
6229 addr = null_pointer_node;
6230 args = tree_cons (NULL_TREE,
6231 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6232 tf_warning_or_error),
6234 if (targetm.cxx.use_aeabi_atexit ())
6236 args = tree_cons (NULL_TREE, cleanup, args);
6237 args = tree_cons (NULL_TREE, addr, args);
6241 args = tree_cons (NULL_TREE, addr, args);
6242 args = tree_cons (NULL_TREE, cleanup, args);
6246 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6247 return cp_build_function_call (get_atexit_node (), args,
6248 tf_warning_or_error);
6251 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6252 is its initializer. Generate code to handle the construction
6253 and destruction of DECL. */
6256 expand_static_init (tree decl, tree init)
6258 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6259 gcc_assert (TREE_STATIC (decl));
6261 /* Some variables require no initialization. */
6263 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6264 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6267 if (DECL_FUNCTION_SCOPE_P (decl))
6269 /* Emit code to perform this initialization but once. */
6270 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6271 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6272 tree guard, guard_addr;
6273 tree acquire_fn, release_fn, abort_fn;
6276 /* Emit code to perform this initialization but once. This code
6279 static <type> guard;
6280 if (!guard.first_byte) {
6281 if (__cxa_guard_acquire (&guard)) {
6284 // Do initialization.
6285 flag = true; __cxa_guard_release (&guard);
6286 // Register variable for destruction at end of program.
6288 if (!flag) __cxa_guard_abort (&guard);
6292 Note that the `flag' variable is only set to 1 *after* the
6293 initialization is complete. This ensures that an exception,
6294 thrown during the construction, will cause the variable to
6295 reinitialized when we pass through this code again, as per:
6299 If the initialization exits by throwing an exception, the
6300 initialization is not complete, so it will be tried again
6301 the next time control enters the declaration.
6303 This process should be thread-safe, too; multiple threads
6304 should not be able to initialize the variable more than
6307 /* Create the guard variable. */
6308 guard = get_guard (decl);
6310 /* This optimization isn't safe on targets with relaxed memory
6311 consistency. On such targets we force synchronization in
6312 __cxa_guard_acquire. */
6313 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6315 /* Begin the conditional initialization. */
6316 if_stmt = begin_if_stmt ();
6317 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6318 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6321 if (flag_threadsafe_statics)
6323 guard_addr = build_address (guard);
6325 acquire_fn = get_identifier ("__cxa_guard_acquire");
6326 release_fn = get_identifier ("__cxa_guard_release");
6327 abort_fn = get_identifier ("__cxa_guard_abort");
6328 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6330 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6332 tree vfntype = build_function_type (void_type_node, argtypes);
6333 acquire_fn = push_library_fn
6334 (acquire_fn, build_function_type (integer_type_node, argtypes),
6336 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6337 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6341 release_fn = identifier_global_value (release_fn);
6342 abort_fn = identifier_global_value (abort_fn);
6345 inner_if_stmt = begin_if_stmt ();
6346 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6349 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6350 begin = get_target_expr (boolean_false_node);
6351 flag = TARGET_EXPR_SLOT (begin);
6353 TARGET_EXPR_CLEANUP (begin)
6354 = build3 (COND_EXPR, void_type_node, flag,
6356 build_call_n (abort_fn, 1, guard_addr));
6357 CLEANUP_EH_ONLY (begin) = 1;
6359 /* Do the initialization itself. */
6360 init = add_stmt_to_compound (begin, init);
6361 init = add_stmt_to_compound
6362 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6363 init = add_stmt_to_compound
6364 (init, build_call_n (release_fn, 1, guard_addr));
6367 init = add_stmt_to_compound (init, set_guard (guard));
6369 /* Use atexit to register a function for destroying this static
6371 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6373 finish_expr_stmt (init);
6375 if (flag_threadsafe_statics)
6377 finish_compound_stmt (inner_then_clause);
6378 finish_then_clause (inner_if_stmt);
6379 finish_if_stmt (inner_if_stmt);
6382 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6384 finish_compound_stmt (then_clause);
6385 finish_then_clause (if_stmt);
6386 finish_if_stmt (if_stmt);
6390 static_aggregates = tree_cons (init, decl, static_aggregates);
6394 /* Make TYPE a complete type based on INITIAL_VALUE.
6395 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6396 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6397 3 if the initializer list is empty (in pedantic mode). */
6400 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6403 tree type, elt_type;
6407 unsigned HOST_WIDE_INT i;
6410 /* An array of character type can be initialized from a
6411 brace-enclosed string constant.
6413 FIXME: this code is duplicated from reshape_init. Probably
6414 we should just call reshape_init here? */
6415 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6416 && TREE_CODE (initial_value) == CONSTRUCTOR
6417 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6419 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6420 tree value = VEC_index (constructor_elt, v, 0)->value;
6422 if (TREE_CODE (value) == STRING_CST
6423 && VEC_length (constructor_elt, v) == 1)
6424 initial_value = value;
6427 /* If any of the elements are parameter packs, we can't actually
6428 complete this type now because the array size is dependent. */
6429 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6431 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6434 if (PACK_EXPANSION_P (value))
6440 failure = complete_array_type (ptype, initial_value, do_default);
6442 /* We can create the array before the element type is complete, which
6443 means that we didn't have these two bits set in the original type
6444 either. In completing the type, we are expected to propagate these
6445 bits. See also complete_type which does the same thing for arrays
6448 if (TYPE_DOMAIN (type))
6450 elt_type = TREE_TYPE (type);
6451 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6452 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6453 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6459 /* Return zero if something is declared to be a member of type
6460 CTYPE when in the context of CUR_TYPE. STRING is the error
6461 message to print in that case. Otherwise, quietly return 1. */
6464 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6466 if (ctype && ctype != cur_type)
6468 if (flags == DTOR_FLAG)
6469 error ("destructor for alien class %qT cannot be a member", ctype);
6471 error ("constructor for alien class %qT cannot be a member", ctype);
6477 /* Subroutine of `grokdeclarator'. */
6479 /* Generate errors possibly applicable for a given set of specifiers.
6480 This is for ARM $7.1.2. */
6483 bad_specifiers (tree object,
6492 error ("%qD declared as a %<virtual%> %s", object, type);
6494 error ("%qD declared as an %<inline%> %s", object, type);
6496 error ("%<const%> and %<volatile%> function specifiers on "
6497 "%qD invalid in %s declaration",
6500 error ("%q+D declared as a friend", object);
6502 && (TREE_CODE (object) == TYPE_DECL
6503 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6504 && !TYPE_REFFN_P (TREE_TYPE (object))
6505 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6506 error ("%q+D declared with an exception specification", object);
6509 /* DECL is a member function or static data member and is presently
6510 being defined. Check that the definition is taking place in a
6514 check_class_member_definition_namespace (tree decl)
6516 /* These checks only apply to member functions and static data
6518 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6519 || TREE_CODE (decl) == VAR_DECL);
6520 /* We check for problems with specializations in pt.c in
6521 check_specialization_namespace, where we can issue better
6523 if (processing_specialization)
6525 /* There are no restrictions on the placement of
6526 explicit instantiations. */
6527 if (processing_explicit_instantiation)
6531 A member function definition that appears outside of the
6532 class definition shall appear in a namespace scope enclosing
6533 the class definition.
6537 The definition for a static data member shall appear in a
6538 namespace scope enclosing the member's class definition. */
6539 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6540 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6541 decl, DECL_CONTEXT (decl));
6544 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6545 METHOD_TYPE for a non-static member function; QUALS are the
6546 cv-qualifiers that apply to the function. */
6549 build_this_parm (tree type, cp_cv_quals quals)
6554 cp_cv_quals this_quals;
6556 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6557 /* The `this' parameter is implicitly `const'; it cannot be
6559 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6560 qual_type = cp_build_qualified_type (this_type, this_quals);
6561 parm = build_artificial_parm (this_identifier, qual_type);
6562 cp_apply_type_quals_to_decl (this_quals, parm);
6566 /* CTYPE is class type, or null if non-class.
6567 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6569 DECLARATOR is the function's name.
6570 PARMS is a chain of PARM_DECLs for the function.
6571 VIRTUALP is truthvalue of whether the function is virtual or not.
6572 FLAGS are to be passed through to `grokclassfn'.
6573 QUALS are qualifiers indicating whether the function is `const'
6575 RAISES is a list of exceptions that this function can raise.
6576 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6577 not look, and -1 if we should not call `grokclassfn' at all.
6579 SFK is the kind of special function (if any) for the new function.
6581 Returns `NULL_TREE' if something goes wrong, after issuing
6582 applicable error messages. */
6585 grokfndecl (tree ctype,
6589 tree orig_declarator,
6591 enum overload_flags flags,
6598 special_function_kind sfk,
6603 location_t location)
6606 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6610 type = build_exception_variant (type, raises);
6612 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6614 /* If we have an explicit location, use it, otherwise use whatever
6615 build_lang_decl used (probably input_location). */
6616 if (location != UNKNOWN_LOCATION)
6617 DECL_SOURCE_LOCATION (decl) = location;
6619 if (TREE_CODE (type) == METHOD_TYPE)
6622 parm = build_this_parm (type, quals);
6623 TREE_CHAIN (parm) = parms;
6626 DECL_ARGUMENTS (decl) = parms;
6627 for (t = parms; t; t = TREE_CHAIN (t))
6628 DECL_CONTEXT (t) = decl;
6629 /* Propagate volatile out from type to decl. */
6630 if (TYPE_VOLATILE (type))
6631 TREE_THIS_VOLATILE (decl) = 1;
6633 /* Setup decl according to sfk. */
6636 case sfk_constructor:
6637 case sfk_copy_constructor:
6638 case sfk_move_constructor:
6639 DECL_CONSTRUCTOR_P (decl) = 1;
6641 case sfk_destructor:
6642 DECL_DESTRUCTOR_P (decl) = 1;
6648 /* If pointers to member functions use the least significant bit to
6649 indicate whether a function is virtual, ensure a pointer
6650 to this function will have that bit clear. */
6651 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6652 && TREE_CODE (type) == METHOD_TYPE
6653 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6654 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6657 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6661 ("defining explicit specialization %qD in friend declaration",
6665 tree fns = TREE_OPERAND (orig_declarator, 0);
6666 tree args = TREE_OPERAND (orig_declarator, 1);
6668 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6670 /* Something like `template <class T> friend void f<T>()'. */
6671 error ("invalid use of template-id %qD in declaration "
6672 "of primary template",
6678 /* A friend declaration of the form friend void f<>(). Record
6679 the information in the TEMPLATE_ID_EXPR. */
6680 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6682 if (TREE_CODE (fns) == COMPONENT_REF)
6684 /* Due to bison parser ickiness, we will have already looked
6685 up an operator_name or PFUNCNAME within the current class
6686 (see template_id in parse.y). If the current class contains
6687 such a name, we'll get a COMPONENT_REF here. Undo that. */
6689 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6690 == current_class_type);
6691 fns = TREE_OPERAND (fns, 1);
6693 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6694 || TREE_CODE (fns) == OVERLOAD);
6695 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6697 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6698 if (TREE_PURPOSE (t)
6699 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6701 error ("default arguments are not allowed in declaration "
6702 "of friend template specialization %qD",
6709 error ("%<inline%> is not allowed in declaration of friend "
6710 "template specialization %qD",
6717 /* If this decl has namespace scope, set that up. */
6719 set_decl_namespace (decl, in_namespace, friendp);
6721 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6723 /* `main' and builtins have implicit 'C' linkage. */
6724 if ((MAIN_NAME_P (declarator)
6725 || (IDENTIFIER_LENGTH (declarator) > 10
6726 && IDENTIFIER_POINTER (declarator)[0] == '_'
6727 && IDENTIFIER_POINTER (declarator)[1] == '_'
6728 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6729 && current_lang_name == lang_name_cplusplus
6730 && ctype == NULL_TREE
6731 /* NULL_TREE means global namespace. */
6732 && DECL_CONTEXT (decl) == NULL_TREE)
6733 SET_DECL_LANGUAGE (decl, lang_c);
6735 /* Should probably propagate const out from type to decl I bet (mrs). */
6738 DECL_STATIC_FUNCTION_P (decl) = 1;
6739 DECL_CONTEXT (decl) = ctype;
6744 DECL_CONTEXT (decl) = ctype;
6746 check_class_member_definition_namespace (decl);
6749 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6751 if (processing_template_decl)
6752 error ("cannot declare %<::main%> to be a template");
6754 error ("cannot declare %<::main%> to be inline");
6756 error ("cannot declare %<::main%> to be static");
6761 /* Members of anonymous types and local classes have no linkage; make
6762 them internal. If a typedef is made later, this will be changed. */
6763 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6764 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6767 TREE_PUBLIC (decl) = publicp;
6770 DECL_INTERFACE_KNOWN (decl) = 1;
6771 DECL_NOT_REALLY_EXTERN (decl) = 1;
6774 /* If the declaration was declared inline, mark it as such. */
6776 DECL_DECLARED_INLINE_P (decl) = 1;
6778 DECL_EXTERNAL (decl) = 1;
6779 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6782 ? G_("static member function %qD cannot have cv-qualifier")
6783 : G_("non-member function %qD cannot have cv-qualifier"),
6785 quals = TYPE_UNQUALIFIED;
6788 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6789 && !grok_op_properties (decl, /*complain=*/true))
6793 /* Make the init_value nonzero so pushdecl knows this is not
6794 tentative. error_mark_node is replaced later with the BLOCK. */
6795 DECL_INITIAL (decl) = error_mark_node;
6797 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6798 TREE_NOTHROW (decl) = 1;
6800 /* Caller will do the rest of this. */
6804 if (ctype != NULL_TREE)
6805 grokclassfn (ctype, decl, flags);
6807 decl = check_explicit_specialization (orig_declarator, decl,
6810 4 * (friendp != 0));
6811 if (decl == error_mark_node)
6816 cplus_decl_attributes (&decl, *attrlist, 0);
6817 *attrlist = NULL_TREE;
6820 /* Check main's type after attributes have been applied. */
6821 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6823 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6826 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6828 error ("%<::main%> must return %<int%>");
6829 newtype = build_function_type (integer_type_node, oldtypeargs);
6830 TREE_TYPE (decl) = newtype;
6833 check_main_parameter_types (decl);
6836 if (ctype != NULL_TREE
6837 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6840 tree old_decl = check_classfn (ctype, decl,
6841 (processing_template_decl
6842 > template_class_depth (ctype))
6843 ? current_template_parms
6846 if (old_decl == error_mark_node)
6854 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6855 /* Because grokfndecl is always supposed to return a
6856 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6857 here. We depend on our callers to figure out that its
6858 really a template that's being returned. */
6859 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6861 if (DECL_STATIC_FUNCTION_P (old_decl)
6862 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6863 /* Remove the `this' parm added by grokclassfn.
6864 XXX Isn't this done in start_function, too? */
6865 revert_static_member_fn (decl);
6866 if (DECL_ARTIFICIAL (old_decl))
6868 error ("definition of implicitly-declared %qD", old_decl);
6872 /* Since we've smashed OLD_DECL to its
6873 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6874 if (TREE_CODE (decl) == TEMPLATE_DECL)
6875 decl = DECL_TEMPLATE_RESULT (decl);
6877 /* Attempt to merge the declarations. This can fail, in
6878 the case of some invalid specialization declarations. */
6879 pushed_scope = push_scope (ctype);
6880 ok = duplicate_decls (decl, old_decl, friendp);
6882 pop_scope (pushed_scope);
6885 error ("no %q#D member function declared in class %qT",
6893 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6896 if (ctype == NULL_TREE || check)
6900 DECL_VIRTUAL_P (decl) = 1;
6905 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6906 the linkage that DECL will receive in the object file. */
6909 set_linkage_for_static_data_member (tree decl)
6911 /* A static data member always has static storage duration and
6912 external linkage. Note that static data members are forbidden in
6913 local classes -- the only situation in which a class has
6914 non-external linkage. */
6915 TREE_PUBLIC (decl) = 1;
6916 TREE_STATIC (decl) = 1;
6917 /* For non-template classes, static data members are always put
6918 out in exactly those files where they are defined, just as
6919 with ordinary namespace-scope variables. */
6920 if (!processing_template_decl)
6921 DECL_INTERFACE_KNOWN (decl) = 1;
6924 /* Create a VAR_DECL named NAME with the indicated TYPE.
6926 If SCOPE is non-NULL, it is the class type or namespace containing
6927 the variable. If SCOPE is NULL, the variable should is created in
6928 the innermost enclosings scope. */
6931 grokvardecl (tree type,
6933 const cp_decl_specifier_seq *declspecs,
6939 tree explicit_scope;
6941 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6943 /* Compute the scope in which to place the variable, but remember
6944 whether or not that scope was explicitly specified by the user. */
6945 explicit_scope = scope;
6948 /* An explicit "extern" specifier indicates a namespace-scope
6950 if (declspecs->storage_class == sc_extern)
6951 scope = current_namespace;
6952 else if (!at_function_scope_p ())
6953 scope = current_scope ();
6957 && (/* If the variable is a namespace-scope variable declared in a
6958 template, we need DECL_LANG_SPECIFIC. */
6959 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6960 /* Similarly for namespace-scope variables with language linkage
6962 || (TREE_CODE (scope) == NAMESPACE_DECL
6963 && current_lang_name != lang_name_cplusplus)
6964 /* Similarly for static data members. */
6966 decl = build_lang_decl (VAR_DECL, name, type);
6968 decl = build_decl (input_location, VAR_DECL, name, type);
6970 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6971 set_decl_namespace (decl, explicit_scope, 0);
6973 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6975 if (declspecs->storage_class == sc_extern)
6977 DECL_THIS_EXTERN (decl) = 1;
6978 DECL_EXTERNAL (decl) = !initialized;
6981 if (DECL_CLASS_SCOPE_P (decl))
6983 set_linkage_for_static_data_member (decl);
6984 /* This function is only called with out-of-class definitions. */
6985 DECL_EXTERNAL (decl) = 0;
6986 check_class_member_definition_namespace (decl);
6988 /* At top level, either `static' or no s.c. makes a definition
6989 (perhaps tentative), and absence of `static' makes it public. */
6990 else if (toplevel_bindings_p ())
6992 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6993 && (DECL_THIS_EXTERN (decl) || ! constp));
6994 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6996 /* Not at top level, only `static' makes a static definition. */
6999 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7000 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7003 if (declspecs->specs[(int)ds_thread])
7004 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7006 if (TREE_PUBLIC (decl))
7008 /* If the type of the decl has no linkage, make sure that we'll
7009 notice that in mark_used. */
7010 if (DECL_LANG_SPECIFIC (decl) == NULL
7011 && TREE_PUBLIC (decl)
7012 && !DECL_EXTERN_C_P (decl)
7013 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7014 retrofit_lang_decl (decl);
7017 DECL_INTERFACE_KNOWN (decl) = 1;
7022 /* Create and return a canonical pointer to member function type, for
7023 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7026 build_ptrmemfunc_type (tree type)
7030 tree unqualified_variant = NULL_TREE;
7032 if (type == error_mark_node)
7035 /* If a canonical type already exists for this type, use it. We use
7036 this method instead of type_hash_canon, because it only does a
7037 simple equality check on the list of field members. */
7039 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7042 /* Make sure that we always have the unqualified pointer-to-member
7044 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7046 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7048 t = make_class_type (RECORD_TYPE);
7049 xref_basetypes (t, NULL_TREE);
7051 /* Let the front end know this is a pointer to member function... */
7052 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7053 /* ... and not really a class type. */
7054 SET_CLASS_TYPE_P (t, 0);
7056 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7059 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7061 TREE_CHAIN (field) = fields;
7064 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7066 /* Zap out the name so that the back end will give us the debugging
7067 information for this anonymous RECORD_TYPE. */
7068 TYPE_NAME (t) = NULL_TREE;
7070 /* If this is not the unqualified form of this pointer-to-member
7071 type, set the TYPE_MAIN_VARIANT for this type to be the
7072 unqualified type. Since they are actually RECORD_TYPEs that are
7073 not variants of each other, we must do this manually.
7074 As we just built a new type there is no need to do yet another copy. */
7075 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7077 int type_quals = cp_type_quals (type);
7078 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7079 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7080 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7081 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7082 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7083 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7084 TREE_TYPE (TYPE_BINFO (t)) = t;
7087 /* Cache this pointer-to-member type so that we can find it again
7089 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7091 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7092 SET_TYPE_STRUCTURAL_EQUALITY (t);
7093 else if (TYPE_CANONICAL (type) != type)
7094 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7099 /* Create and return a pointer to data member type. */
7102 build_ptrmem_type (tree class_type, tree member_type)
7104 if (TREE_CODE (member_type) == METHOD_TYPE)
7108 arg_types = TYPE_ARG_TYPES (member_type);
7109 class_type = (cp_build_qualified_type
7111 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7113 = build_method_type_directly (class_type,
7114 TREE_TYPE (member_type),
7115 TREE_CHAIN (arg_types));
7116 return build_ptrmemfunc_type (build_pointer_type (member_type));
7120 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7121 return build_offset_type (class_type, member_type);
7125 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7126 Check to see that the definition is valid. Issue appropriate error
7127 messages. Return 1 if the definition is particularly bad, or 0
7131 check_static_variable_definition (tree decl, tree type)
7133 /* Motion 10 at San Diego: If a static const integral data member is
7134 initialized with an integral constant expression, the initializer
7135 may appear either in the declaration (within the class), or in
7136 the definition, but not both. If it appears in the class, the
7137 member is a member constant. The file-scope definition is always
7139 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7141 error ("invalid in-class initialization of static data member "
7142 "of non-integral type %qT",
7144 /* If we just return the declaration, crashes will sometimes
7145 occur. We therefore return void_type_node, as if this were a
7146 friend declaration, to cause callers to completely ignore
7147 this declaration. */
7150 else if (!CP_TYPE_CONST_P (type))
7151 error ("ISO C++ forbids in-class initialization of non-const "
7152 "static member %qD",
7154 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7155 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7156 "%qD of non-integral type %qT", decl, type);
7161 /* Given the SIZE (i.e., number of elements) in an array, compute an
7162 appropriate index type for the array. If non-NULL, NAME is the
7163 name of the thing being declared. */
7166 compute_array_index_type (tree name, tree size)
7170 tree abi_1_itype = NULL_TREE;
7172 if (error_operand_p (size))
7173 return error_mark_node;
7175 type = TREE_TYPE (size);
7176 /* The array bound must be an integer type. */
7177 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7180 error ("size of array %qD has non-integral type %qT", name, type);
7182 error ("size of array has non-integral type %qT", type);
7183 size = integer_one_node;
7184 type = TREE_TYPE (size);
7187 /* We can only call value_dependent_expression_p on integral constant
7188 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7189 set if this isn't one. */
7190 if (processing_template_decl
7191 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7193 /* We cannot do any checking for a SIZE that isn't known to be
7194 constant. Just build the index type and mark that it requires
7195 structural equality checks. */
7196 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7197 size, integer_one_node));
7198 if (!TREE_SIDE_EFFECTS (size))
7200 TYPE_DEPENDENT_P (itype) = 1;
7201 TYPE_DEPENDENT_P_VALID (itype) = 1;
7203 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7207 if (!abi_version_at_least (2) && processing_template_decl)
7208 /* For abi-1, we handled all instances in templates the same way,
7209 even when they were non-dependent. This affects the manglings
7210 produced. So, we do the normal checking for non-dependent
7211 sizes, but at the end we'll return the same type that abi-1
7212 would have, but with TYPE_CANONICAL set to the "right"
7213 value that the current ABI would provide. */
7214 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7215 size, integer_one_node));
7217 /* The size might be the result of a cast. */
7218 STRIP_TYPE_NOPS (size);
7220 /* It might be a const variable or enumeration constant. */
7221 size = integral_constant_value (size);
7223 /* Normally, the array-bound will be a constant. */
7224 if (TREE_CODE (size) == INTEGER_CST)
7226 /* Check to see if the array bound overflowed. Make that an
7227 error, no matter how generous we're being. */
7228 constant_expression_error (size);
7230 /* An array must have a positive number of elements. */
7231 if (INT_CST_LT (size, integer_zero_node))
7234 error ("size of array %qD is negative", name);
7236 error ("size of array is negative");
7237 size = integer_one_node;
7239 /* As an extension we allow zero-sized arrays. We always allow
7240 them in system headers because glibc uses them. */
7241 else if (integer_zerop (size) && !in_system_header)
7244 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7246 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7249 else if (TREE_CONSTANT (size))
7251 /* `(int) &fn' is not a valid array bound. */
7253 error ("size of array %qD is not an integral constant-expression",
7256 error ("size of array is not an integral constant-expression");
7257 size = integer_one_node;
7259 else if (pedantic && warn_vla != 0)
7262 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7264 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7266 else if (warn_vla > 0)
7270 "variable length array %qD is used", name);
7273 "variable length array is used");
7276 if (processing_template_decl && !TREE_CONSTANT (size))
7277 /* A variable sized array. */
7278 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7281 HOST_WIDE_INT saved_processing_template_decl;
7283 /* Compute the index of the largest element in the array. It is
7284 one less than the number of elements in the array. We save
7285 and restore PROCESSING_TEMPLATE_DECL so that computations in
7286 cp_build_binary_op will be appropriately folded. */
7287 saved_processing_template_decl = processing_template_decl;
7288 processing_template_decl = 0;
7289 itype = cp_build_binary_op (input_location,
7291 cp_convert (ssizetype, size),
7292 cp_convert (ssizetype, integer_one_node),
7293 tf_warning_or_error);
7294 itype = fold (itype);
7295 processing_template_decl = saved_processing_template_decl;
7297 if (!TREE_CONSTANT (itype))
7298 /* A variable sized array. */
7299 itype = variable_size (itype);
7300 /* Make sure that there was no overflow when creating to a signed
7301 index type. (For example, on a 32-bit machine, an array with
7302 size 2^32 - 1 is too big.) */
7303 else if (TREE_CODE (itype) == INTEGER_CST
7304 && TREE_OVERFLOW (itype))
7306 error ("overflow in array dimension");
7307 TREE_OVERFLOW (itype) = 0;
7311 /* Create and return the appropriate index type. */
7314 tree t = build_index_type (itype);
7315 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7319 return build_index_type (itype);
7322 /* Returns the scope (if any) in which the entity declared by
7323 DECLARATOR will be located. If the entity was declared with an
7324 unqualified name, NULL_TREE is returned. */
7327 get_scope_of_declarator (const cp_declarator *declarator)
7329 while (declarator && declarator->kind != cdk_id)
7330 declarator = declarator->declarator;
7332 /* If the declarator-id is a SCOPE_REF, the scope in which the
7333 declaration occurs is the first operand. */
7335 && declarator->u.id.qualifying_scope)
7336 return declarator->u.id.qualifying_scope;
7338 /* Otherwise, the declarator is not a qualified name; the entity will
7339 be declared in the current scope. */
7343 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7344 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7348 create_array_type_for_decl (tree name, tree type, tree size)
7350 tree itype = NULL_TREE;
7351 const char* error_msg;
7353 /* If things have already gone awry, bail now. */
7354 if (type == error_mark_node || size == error_mark_node)
7355 return error_mark_node;
7357 /* Assume that everything will go OK. */
7360 /* There are some types which cannot be array elements. */
7361 switch (TREE_CODE (type))
7364 error_msg = "array of void";
7368 error_msg = "array of functions";
7371 case REFERENCE_TYPE:
7372 error_msg = "array of references";
7376 error_msg = "array of function members";
7383 /* If something went wrong, issue an error-message and return. */
7387 error ("declaration of %qD as %s", name, error_msg);
7389 error ("creating %s", error_msg);
7391 return error_mark_node;
7396 The constant expressions that specify the bounds of the arrays
7397 can be omitted only for the first member of the sequence. */
7398 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7401 error ("declaration of %qD as multidimensional array must "
7402 "have bounds for all dimensions except the first",
7405 error ("multidimensional array must have bounds for all "
7406 "dimensions except the first");
7408 return error_mark_node;
7411 /* Figure out the index type for the array. */
7413 itype = compute_array_index_type (name, size);
7416 T is called the array element type; this type shall not be [...] an
7417 abstract class type. */
7418 abstract_virtuals_error (name, type);
7420 return build_cplus_array_type (type, itype);
7423 /* Check that it's OK to declare a function with the indicated TYPE.
7424 SFK indicates the kind of special function (if any) that this
7425 function is. OPTYPE is the type given in a conversion operator
7426 declaration, or the class type for a constructor/destructor.
7427 Returns the actual return type of the function; that
7428 may be different than TYPE if an error occurs, or for certain
7429 special functions. */
7432 check_special_function_return_type (special_function_kind sfk,
7438 case sfk_constructor:
7440 error ("return type specification for constructor invalid");
7442 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7443 type = build_pointer_type (optype);
7445 type = void_type_node;
7448 case sfk_destructor:
7450 error ("return type specification for destructor invalid");
7451 /* We can't use the proper return type here because we run into
7452 problems with ambiguous bases and covariant returns.
7453 Java classes are left unchanged because (void *) isn't a valid
7454 Java type, and we don't want to change the Java ABI. */
7455 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7456 type = build_pointer_type (void_type_node);
7458 type = void_type_node;
7461 case sfk_conversion:
7463 error ("return type specified for %<operator %T%>", optype);
7474 /* A variable or data member (whose unqualified name is IDENTIFIER)
7475 has been declared with the indicated TYPE. If the TYPE is not
7476 acceptable, issue an error message and return a type to use for
7477 error-recovery purposes. */
7480 check_var_type (tree identifier, tree type)
7482 if (VOID_TYPE_P (type))
7485 error ("unnamed variable or field declared void");
7486 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7488 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7489 error ("variable or field %qE declared void", identifier);
7492 error ("variable or field declared void");
7493 type = error_mark_node;
7499 /* Given declspecs and a declarator (abstract or otherwise), determine
7500 the name and type of the object declared and construct a DECL node
7503 DECLSPECS points to the representation of declaration-specifier
7504 sequence that precedes declarator.
7506 DECL_CONTEXT says which syntactic context this declaration is in:
7507 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7508 FUNCDEF for a function definition. Like NORMAL but a few different
7509 error messages in each case. Return value may be zero meaning
7510 this definition is too screwy to try to parse.
7511 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7512 handle member functions (which have FIELD context).
7513 Return value may be zero meaning this definition is too screwy to
7515 PARM for a parameter declaration (either within a function prototype
7516 or before a function body). Make a PARM_DECL, or return void_type_node.
7517 CATCHPARM for a parameter declaration before a catch clause.
7518 TYPENAME if for a typename (in a cast or sizeof).
7519 Don't make a DECL node; just return the ..._TYPE node.
7520 FIELD for a struct or union field; make a FIELD_DECL.
7521 BITFIELD for a field with specified width.
7522 INITIALIZED is as for start_decl.
7524 ATTRLIST is a pointer to the list of attributes, which may be NULL
7525 if there are none; *ATTRLIST may be modified if attributes from inside
7526 the declarator should be applied to the declaration.
7528 When this function is called, scoping variables (such as
7529 CURRENT_CLASS_TYPE) should reflect the scope in which the
7530 declaration occurs, not the scope in which the new declaration will
7531 be placed. For example, on:
7535 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7538 Returns a DECL (if a declarator is present), a TYPE (if there is no
7539 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7543 grokdeclarator (const cp_declarator *declarator,
7544 const cp_decl_specifier_seq *declspecs,
7545 enum decl_context decl_context,
7549 tree type = NULL_TREE;
7551 int virtualp, explicitp, friendp, inlinep, staticp;
7552 int explicit_int = 0;
7553 int explicit_char = 0;
7554 int defaulted_int = 0;
7555 tree dependent_name = NULL_TREE;
7557 tree typedef_decl = NULL_TREE;
7558 const char *name = NULL;
7559 tree typedef_type = NULL_TREE;
7560 /* True if this declarator is a function definition. */
7561 bool funcdef_flag = false;
7562 cp_declarator_kind innermost_code = cdk_error;
7565 /* See the code below that used this. */
7566 tree decl_attr = NULL_TREE;
7569 /* Keep track of what sort of function is being processed
7570 so that we can warn about default return values, or explicit
7571 return values which do not match prescribed defaults. */
7572 special_function_kind sfk = sfk_none;
7574 tree dname = NULL_TREE;
7575 tree ctor_return_type = NULL_TREE;
7576 enum overload_flags flags = NO_SPECIAL;
7577 /* cv-qualifiers that apply to the declarator, for a declaration of
7578 a member function. */
7579 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7580 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7582 tree raises = NULL_TREE;
7583 int template_count = 0;
7584 tree returned_attrs = NULL_TREE;
7585 tree parms = NULL_TREE;
7586 const cp_declarator *id_declarator;
7587 /* The unqualified name of the declarator; either an
7588 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7589 tree unqualified_id;
7590 /* The class type, if any, in which this entity is located,
7591 or NULL_TREE if none. Note that this value may be different from
7592 the current class type; for example if an attempt is made to declare
7593 "A::f" inside "B", this value will be "A". */
7594 tree ctype = current_class_type;
7595 /* The NAMESPACE_DECL for the namespace in which this entity is
7596 located. If an unqualified name is used to declare the entity,
7597 this value will be NULL_TREE, even if the entity is located at
7599 tree in_namespace = NULL_TREE;
7600 cp_storage_class storage_class;
7601 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7602 bool type_was_error_mark_node = false;
7603 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7604 bool template_type_arg = false;
7605 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7608 signed_p = declspecs->specs[(int)ds_signed];
7609 unsigned_p = declspecs->specs[(int)ds_unsigned];
7610 short_p = declspecs->specs[(int)ds_short];
7611 long_p = declspecs->specs[(int)ds_long];
7612 longlong = declspecs->specs[(int)ds_long] >= 2;
7613 thread_p = declspecs->specs[(int)ds_thread];
7615 if (decl_context == FUNCDEF)
7616 funcdef_flag = true, decl_context = NORMAL;
7617 else if (decl_context == MEMFUNCDEF)
7618 funcdef_flag = true, decl_context = FIELD;
7619 else if (decl_context == BITFIELD)
7620 bitfield = 1, decl_context = FIELD;
7621 else if (decl_context == TEMPLATE_TYPE_ARG)
7622 template_type_arg = true, decl_context = TYPENAME;
7624 if (initialized > 1)
7625 funcdef_flag = true;
7627 /* Look inside a declarator for the name being declared
7628 and get it as a string, for an error message. */
7629 for (id_declarator = declarator;
7631 id_declarator = id_declarator->declarator)
7633 if (id_declarator->kind != cdk_id)
7634 innermost_code = id_declarator->kind;
7636 switch (id_declarator->kind)
7639 if (id_declarator->declarator
7640 && id_declarator->declarator->kind == cdk_id)
7642 sfk = id_declarator->declarator->u.id.sfk;
7643 if (sfk == sfk_destructor)
7650 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7651 tree decl = id_declarator->u.id.unqualified_name;
7654 if (qualifying_scope)
7656 if (at_function_scope_p ())
7660 A declarator-id shall not be qualified except
7663 None of the cases are permitted in block
7665 if (qualifying_scope == global_namespace)
7666 error ("invalid use of qualified-name %<::%D%>",
7668 else if (TYPE_P (qualifying_scope))
7669 error ("invalid use of qualified-name %<%T::%D%>",
7670 qualifying_scope, decl);
7672 error ("invalid use of qualified-name %<%D::%D%>",
7673 qualifying_scope, decl);
7674 return error_mark_node;
7676 else if (TYPE_P (qualifying_scope))
7678 ctype = qualifying_scope;
7679 if (innermost_code != cdk_function
7680 && current_class_type
7681 && !UNIQUELY_DERIVED_FROM_P (ctype,
7682 current_class_type))
7684 error ("type %qT is not derived from type %qT",
7685 ctype, current_class_type);
7686 return error_mark_node;
7689 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7690 in_namespace = qualifying_scope;
7692 switch (TREE_CODE (decl))
7698 if (innermost_code != cdk_function)
7700 error ("declaration of %qD as non-function", decl);
7701 return error_mark_node;
7703 else if (!qualifying_scope
7704 && !(current_class_type && at_class_scope_p ()))
7706 error ("declaration of %qD as non-member", decl);
7707 return error_mark_node;
7710 type = TREE_OPERAND (decl, 0);
7712 type = constructor_name (type);
7713 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7718 case TEMPLATE_ID_EXPR:
7720 tree fns = TREE_OPERAND (decl, 0);
7723 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7725 gcc_assert (is_overloaded_fn (dname));
7726 dname = DECL_NAME (get_first_fn (dname));
7731 case IDENTIFIER_NODE:
7732 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7735 if (C_IS_RESERVED_WORD (dname))
7737 error ("declarator-id missing; using reserved word %qD",
7739 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7741 else if (!IDENTIFIER_TYPENAME_P (dname))
7742 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7745 gcc_assert (flags == NO_SPECIAL);
7746 flags = TYPENAME_FLAG;
7747 ctor_return_type = TREE_TYPE (dname);
7748 sfk = sfk_conversion;
7749 if (is_typename_at_global_scope (dname))
7750 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7752 name = "<invalid operator>";
7769 return error_mark_node;
7774 if (id_declarator->kind == cdk_id)
7780 The declarator in a function-definition shall have the form
7781 D1 ( parameter-declaration-clause) ... */
7782 if (funcdef_flag && innermost_code != cdk_function)
7784 error ("function definition does not declare parameters");
7785 return error_mark_node;
7788 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7789 && innermost_code != cdk_function
7790 && ! (ctype && !declspecs->any_specifiers_p))
7792 error ("declaration of %qD as non-function", dname);
7793 return error_mark_node;
7796 /* Anything declared one level down from the top level
7797 must be one of the parameters of a function
7798 (because the body is at least two levels down). */
7800 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7801 by not allowing C++ class definitions to specify their parameters
7802 with xdecls (must be spec.d in the parmlist).
7804 Since we now wait to push a class scope until we are sure that
7805 we are in a legitimate method context, we must set oldcname
7806 explicitly (since current_class_name is not yet alive).
7808 We also want to avoid calling this a PARM if it is in a namespace. */
7810 if (decl_context == NORMAL && !toplevel_bindings_p ())
7812 struct cp_binding_level *b = current_binding_level;
7813 current_binding_level = b->level_chain;
7814 if (current_binding_level != 0 && toplevel_bindings_p ())
7815 decl_context = PARM;
7816 current_binding_level = b;
7820 name = decl_context == PARM ? "parameter" : "type name";
7822 /* If there were multiple types specified in the decl-specifier-seq,
7823 issue an error message. */
7824 if (declspecs->multiple_types_p)
7826 error ("two or more data types in declaration of %qs", name);
7827 return error_mark_node;
7830 if (declspecs->conflicting_specifiers_p)
7832 error ("conflicting specifiers in declaration of %qs", name);
7833 return error_mark_node;
7836 /* Extract the basic type from the decl-specifier-seq. */
7837 type = declspecs->type;
7838 if (type == error_mark_node)
7841 type_was_error_mark_node = true;
7843 /* If the entire declaration is itself tagged as deprecated then
7844 suppress reports of deprecated items. */
7845 if (type && TREE_DEPRECATED (type)
7846 && deprecated_state != DEPRECATED_SUPPRESS)
7847 warn_deprecated_use (type, NULL_TREE);
7848 if (type && TREE_CODE (type) == TYPE_DECL)
7850 typedef_decl = type;
7851 type = TREE_TYPE (typedef_decl);
7852 if (TREE_DEPRECATED (type)
7853 && DECL_ARTIFICIAL (typedef_decl)
7854 && deprecated_state != DEPRECATED_SUPPRESS)
7855 warn_deprecated_use (type, NULL_TREE);
7857 /* No type at all: default to `int', and set DEFAULTED_INT
7858 because it was not a user-defined typedef. */
7859 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7861 /* These imply 'int'. */
7862 type = integer_type_node;
7866 explicit_int = declspecs->explicit_int_p;
7867 explicit_char = declspecs->explicit_char_p;
7870 /* See the code below that used this. */
7872 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7874 typedef_type = type;
7877 if (sfk != sfk_conversion)
7878 ctor_return_type = ctype;
7880 if (sfk != sfk_none)
7881 type = check_special_function_return_type (sfk, type,
7883 else if (type == NULL_TREE)
7889 /* We handle `main' specially here, because 'main () { }' is so
7890 common. With no options, it is allowed. With -Wreturn-type,
7891 it is a warning. It is only an error with -pedantic-errors. */
7892 is_main = (funcdef_flag
7893 && dname && MAIN_NAME_P (dname)
7894 && ctype == NULL_TREE
7895 && in_namespace == NULL_TREE
7896 && current_namespace == global_namespace);
7898 if (type_was_error_mark_node)
7899 /* We've already issued an error, don't complain more. */;
7900 else if (in_system_header || flag_ms_extensions)
7901 /* Allow it, sigh. */;
7903 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7905 pedwarn (input_location, OPT_pedantic,
7906 "ISO C++ forbids declaration of %qs with no type", name);
7908 warning (OPT_Wreturn_type,
7909 "ISO C++ forbids declaration of %qs with no type", name);
7911 type = integer_type_node;
7916 /* Now process the modifiers that were specified
7917 and check for invalid combinations. */
7919 /* Long double is a special combination. */
7920 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7923 type = build_qualified_type (long_double_type_node,
7924 cp_type_quals (type));
7927 /* Check all other uses of type modifiers. */
7929 if (unsigned_p || signed_p || long_p || short_p)
7933 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7934 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7935 else if (signed_p && unsigned_p)
7936 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7937 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7938 error ("%<long long%> invalid for %qs", name);
7939 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7940 error ("%<long%> invalid for %qs", name);
7941 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7942 error ("%<short%> invalid for %qs", name);
7943 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7944 error ("%<long%> or %<short%> invalid for %qs", name);
7945 else if ((long_p || short_p) && explicit_char)
7946 error ("%<long%> or %<short%> specified with char for %qs", name);
7947 else if (long_p && short_p)
7948 error ("%<long%> and %<short%> specified together for %qs", name);
7949 else if (type == char16_type_node || type == char32_type_node)
7951 if (signed_p || unsigned_p)
7952 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7953 else if (short_p || long_p)
7954 error ("%<short%> or %<long%> invalid for %qs", name);
7959 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7961 pedwarn (input_location, OPT_pedantic,
7962 "long, short, signed or unsigned used invalidly for %qs",
7964 if (flag_pedantic_errors)
7969 /* Discard the type modifiers if they are invalid. */
7980 /* Decide whether an integer type is signed or not.
7981 Optionally treat bitfields as signed by default. */
7985 It is implementation-defined whether a plain (neither
7986 explicitly signed or unsigned) char, short, int, or long
7987 bit-field is signed or unsigned.
7989 Naturally, we extend this to long long as well. Note that
7990 this does not include wchar_t. */
7991 || (bitfield && !flag_signed_bitfields
7993 /* A typedef for plain `int' without `signed' can be
7994 controlled just like plain `int', but a typedef for
7995 `signed int' cannot be so controlled. */
7997 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7998 && TREE_CODE (type) == INTEGER_TYPE
7999 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8002 type = long_long_unsigned_type_node;
8004 type = long_unsigned_type_node;
8006 type = short_unsigned_type_node;
8007 else if (type == char_type_node)
8008 type = unsigned_char_type_node;
8009 else if (typedef_decl)
8010 type = unsigned_type_for (type);
8012 type = unsigned_type_node;
8014 else if (signed_p && type == char_type_node)
8015 type = signed_char_type_node;
8017 type = long_long_integer_type_node;
8019 type = long_integer_type_node;
8021 type = short_integer_type_node;
8023 if (declspecs->specs[(int)ds_complex])
8025 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8026 error ("complex invalid for %qs", name);
8027 /* If we just have "complex", it is equivalent to
8028 "complex double", but if any modifiers at all are specified it is
8029 the complex form of TYPE. E.g, "complex short" is
8030 "complex short int". */
8032 else if (defaulted_int && ! longlong
8033 && ! (long_p || short_p || signed_p || unsigned_p))
8034 type = complex_double_type_node;
8035 else if (type == integer_type_node)
8036 type = complex_integer_type_node;
8037 else if (type == float_type_node)
8038 type = complex_float_type_node;
8039 else if (type == double_type_node)
8040 type = complex_double_type_node;
8041 else if (type == long_double_type_node)
8042 type = complex_long_double_type_node;
8044 type = build_complex_type (type);
8047 type_quals = TYPE_UNQUALIFIED;
8048 if (declspecs->specs[(int)ds_const])
8049 type_quals |= TYPE_QUAL_CONST;
8050 /* A `constexpr' specifier used in an object declaration declares
8051 the object as `const'. */
8054 if (innermost_code == cdk_function)
8056 else if (declspecs->specs[(int)ds_const] != 0)
8057 error ("both %<const%> and %<constexpr%> cannot be used here");
8059 type_quals |= TYPE_QUAL_CONST;
8061 if (declspecs->specs[(int)ds_volatile])
8062 type_quals |= TYPE_QUAL_VOLATILE;
8063 if (declspecs->specs[(int)ds_restrict])
8064 type_quals |= TYPE_QUAL_RESTRICT;
8065 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8066 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8069 if (TREE_CODE (type) == FUNCTION_TYPE
8070 && type_quals != TYPE_UNQUALIFIED)
8072 /* This was an error in C++98 (cv-qualifiers cannot be added to
8073 a function type), but DR 295 makes the code well-formed by
8074 dropping the extra qualifiers. */
8077 tree bad_type = build_qualified_type (type, type_quals);
8078 pedwarn (input_location, OPT_pedantic,
8079 "ignoring %qV qualifiers added to function type %qT",
8082 type_quals = TYPE_UNQUALIFIED;
8084 type_quals |= cp_type_quals (type);
8085 type = cp_build_qualified_type_real
8086 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8087 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8088 /* We might have ignored or rejected some of the qualifiers. */
8089 type_quals = cp_type_quals (type);
8092 inlinep = !! declspecs->specs[(int)ds_inline];
8093 virtualp = !! declspecs->specs[(int)ds_virtual];
8094 explicitp = !! declspecs->specs[(int)ds_explicit];
8096 storage_class = declspecs->storage_class;
8097 if (storage_class == sc_static)
8098 staticp = 1 + (decl_context == FIELD);
8100 if (virtualp && staticp == 2)
8102 error ("member %qD cannot be declared both virtual and static", dname);
8103 storage_class = sc_none;
8106 friendp = !! declspecs->specs[(int)ds_friend];
8108 if (dependent_name && !friendp)
8110 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8111 return error_mark_node;
8114 /* Issue errors about use of storage classes for parameters. */
8115 if (decl_context == PARM)
8117 if (declspecs->specs[(int)ds_typedef])
8119 error ("typedef declaration invalid in parameter declaration");
8120 return error_mark_node;
8122 else if (storage_class == sc_static
8123 || storage_class == sc_extern
8125 error ("storage class specifiers invalid in parameter declarations");
8127 if (type_uses_auto (type))
8129 error ("parameter declared %<auto%>");
8130 type = error_mark_node;
8133 /* Function parameters cannot be constexpr. If we saw one, moan
8134 and pretend it wasn't there. */
8137 error ("a parameter cannot be declared %<constexpr%>");
8142 /* Give error if `virtual' is used outside of class declaration. */
8144 && (current_class_name == NULL_TREE || decl_context != FIELD))
8146 error ("%<virtual%> outside class declaration");
8150 /* Static anonymous unions are dealt with here. */
8151 if (staticp && decl_context == TYPENAME
8153 && ANON_AGGR_TYPE_P (declspecs->type))
8154 decl_context = FIELD;
8156 /* Warn about storage classes that are invalid for certain
8157 kinds of declarations (parameters, typenames, etc.). */
8160 && storage_class != sc_extern
8161 && storage_class != sc_static)
8162 || declspecs->specs[(int)ds_typedef]))
8164 error ("multiple storage classes in declaration of %qs", name);
8167 if (decl_context != NORMAL
8168 && ((storage_class != sc_none
8169 && storage_class != sc_mutable)
8172 if ((decl_context == PARM || decl_context == CATCHPARM)
8173 && (storage_class == sc_register
8174 || storage_class == sc_auto))
8176 else if (declspecs->specs[(int)ds_typedef])
8178 else if (decl_context == FIELD
8179 /* C++ allows static class elements. */
8180 && storage_class == sc_static)
8181 /* C++ also allows inlines and signed and unsigned elements,
8182 but in those cases we don't come in here. */
8186 if (decl_context == FIELD)
8187 error ("storage class specified for %qs", name);
8190 if (decl_context == PARM || decl_context == CATCHPARM)
8191 error ("storage class specified for parameter %qs", name);
8193 error ("storage class specified for typename");
8195 if (storage_class == sc_register
8196 || storage_class == sc_auto
8197 || storage_class == sc_extern
8199 storage_class = sc_none;
8202 else if (storage_class == sc_extern && funcdef_flag
8203 && ! toplevel_bindings_p ())
8204 error ("nested function %qs declared %<extern%>", name);
8205 else if (toplevel_bindings_p ())
8207 if (storage_class == sc_auto)
8208 error ("top-level declaration of %qs specifies %<auto%>", name);
8211 && storage_class != sc_extern
8212 && storage_class != sc_static)
8214 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8219 if (storage_class && friendp)
8221 error ("storage class specifiers invalid in friend function declarations");
8222 storage_class = sc_none;
8227 unqualified_id = NULL_TREE;
8230 unqualified_id = id_declarator->u.id.unqualified_name;
8231 switch (TREE_CODE (unqualified_id))
8234 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8235 if (TYPE_P (unqualified_id))
8236 unqualified_id = constructor_name (unqualified_id);
8239 case IDENTIFIER_NODE:
8240 case TEMPLATE_ID_EXPR:
8248 /* Determine the type of the entity declared by recurring on the
8250 for (; declarator; declarator = declarator->declarator)
8252 const cp_declarator *inner_declarator;
8255 if (type == error_mark_node)
8256 return error_mark_node;
8258 attrs = declarator->attributes;
8264 if (declarator == NULL || declarator->kind == cdk_id)
8265 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8266 if (declarator->kind == cdk_function)
8267 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8268 if (declarator->kind == cdk_array)
8269 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8270 returned_attrs = decl_attributes (&type,
8271 chainon (returned_attrs, attrs),
8275 if (declarator->kind == cdk_id)
8278 inner_declarator = declarator->declarator;
8280 switch (declarator->kind)
8283 type = create_array_type_for_decl (dname, type,
8284 declarator->u.array.bounds);
8292 /* Declaring a function type.
8293 Make sure we have a valid type for the function to return. */
8295 if (type_quals != TYPE_UNQUALIFIED)
8297 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8298 warning (OPT_Wignored_qualifiers,
8299 "type qualifiers ignored on function return type");
8300 /* We now know that the TYPE_QUALS don't apply to the
8301 decl, but to its return type. */
8302 type_quals = TYPE_UNQUALIFIED;
8304 errmsg = targetm.invalid_return_type (type);
8308 type = integer_type_node;
8311 /* Error about some types functions can't return. */
8313 if (TREE_CODE (type) == FUNCTION_TYPE)
8315 error ("%qs declared as function returning a function", name);
8316 return error_mark_node;
8318 if (TREE_CODE (type) == ARRAY_TYPE)
8320 error ("%qs declared as function returning an array", name);
8321 return error_mark_node;
8324 /* Pick up type qualifiers which should be applied to `this'. */
8325 memfn_quals = declarator->u.function.qualifiers;
8327 /* Pick up the exception specifications. */
8328 raises = declarator->u.function.exception_specification;
8330 /* Say it's a definition only for the CALL_EXPR
8331 closest to the identifier. */
8332 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8334 /* Handle a late-specified return type. */
8337 if (type_uses_auto (type))
8339 if (!declarator->u.function.late_return_type)
8341 error ("%qs function uses %<auto%> type specifier without"
8342 " late return type", name);
8343 return error_mark_node;
8345 else if (!is_auto (type))
8347 error ("%qs function with late return type has"
8348 " %qT as its type rather than plain %<auto%>",
8350 return error_mark_node;
8353 else if (declarator->u.function.late_return_type)
8355 error ("%qs function with late return type not declared"
8356 " with %<auto%> type specifier", name);
8357 return error_mark_node;
8360 type = splice_late_return_type
8361 (type, declarator->u.function.late_return_type);
8362 if (type == error_mark_node)
8363 return error_mark_node;
8365 if (ctype == NULL_TREE
8366 && decl_context == FIELD
8368 && (friendp == 0 || dname == current_class_name))
8369 ctype = current_class_type;
8371 if (ctype && (sfk == sfk_constructor
8372 || sfk == sfk_destructor))
8374 /* We are within a class's scope. If our declarator name
8375 is the same as the class name, and we are defining
8376 a function, then it is a constructor/destructor, and
8377 therefore returns a void type. */
8379 /* ISO C++ 12.4/2. A destructor may not be declared
8380 const or volatile. A destructor may not be
8383 ISO C++ 12.1. A constructor may not be declared
8384 const or volatile. A constructor may not be
8385 virtual. A constructor may not be static. */
8387 error ((flags == DTOR_FLAG)
8388 ? "destructor cannot be static member function"
8389 : "constructor cannot be static member function");
8392 error ((flags == DTOR_FLAG)
8393 ? "destructors may not be cv-qualified"
8394 : "constructors may not be cv-qualified");
8395 memfn_quals = TYPE_UNQUALIFIED;
8398 if (decl_context == FIELD
8399 && !member_function_or_else (ctype,
8402 return error_mark_node;
8404 if (flags != DTOR_FLAG)
8406 /* It's a constructor. */
8411 permerror (input_location, "constructors cannot be declared virtual");
8414 if (decl_context == FIELD
8415 && sfk != sfk_constructor)
8416 return error_mark_node;
8418 if (decl_context == FIELD)
8424 error ("can't initialize friend function %qs", name);
8427 /* Cannot be both friend and virtual. */
8428 error ("virtual functions cannot be friends");
8431 if (decl_context == NORMAL)
8432 error ("friend declaration not in class definition");
8433 if (current_function_decl && funcdef_flag)
8434 error ("can't define friend function %qs in a local "
8438 else if (ctype && sfk == sfk_conversion)
8442 maybe_warn_cpp0x ("explicit conversion operators");
8447 /* It is not allowed to use `constexpr' in a function
8448 declaration that is not a definition.
8449 That is too strict, though. */
8450 if (constexpr_p && !funcdef_flag)
8452 error ("the %<constexpr%> specifier cannot be used in "
8453 "a function declaration that is not a definition");
8454 constexpr_p = false;
8457 /* A constexpr non-static member function is implicitly const. */
8458 if (constexpr_p && decl_context == FIELD && staticp == 0
8459 && sfk != sfk_constructor && sfk != sfk_destructor)
8460 memfn_quals |= TYPE_QUAL_CONST;
8462 arg_types = grokparms (declarator->u.function.parameters,
8465 if (inner_declarator
8466 && inner_declarator->kind == cdk_id
8467 && inner_declarator->u.id.sfk == sfk_destructor
8468 && arg_types != void_list_node)
8470 error ("destructors may not have parameters");
8471 arg_types = void_list_node;
8475 type = build_function_type (type, arg_types);
8482 /* Filter out pointers-to-references and references-to-references.
8483 We can get these if a TYPE_DECL is used. */
8485 if (TREE_CODE (type) == REFERENCE_TYPE)
8487 if (declarator->kind != cdk_reference)
8489 error ("cannot declare pointer to %q#T", type);
8490 type = TREE_TYPE (type);
8493 /* In C++0x, we allow reference to reference declarations
8494 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8495 and template type arguments [14.3.1/4 temp.arg.type]. The
8496 check for direct reference to reference declarations, which
8497 are still forbidden, occurs below. Reasoning behind the change
8498 can be found in DR106, DR540, and the rvalue reference
8500 else if (cxx_dialect == cxx98)
8502 error ("cannot declare reference to %q#T", type);
8503 type = TREE_TYPE (type);
8506 else if (VOID_TYPE_P (type))
8508 if (declarator->kind == cdk_reference)
8509 error ("cannot declare reference to %q#T", type);
8510 else if (declarator->kind == cdk_ptrmem)
8511 error ("cannot declare pointer to %q#T member", type);
8514 /* We now know that the TYPE_QUALS don't apply to the decl,
8515 but to the target of the pointer. */
8516 type_quals = TYPE_UNQUALIFIED;
8518 if (declarator->kind == cdk_ptrmem
8519 && (TREE_CODE (type) == FUNCTION_TYPE
8520 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8522 memfn_quals |= cp_type_quals (type);
8523 type = build_memfn_type (type,
8524 declarator->u.pointer.class_type,
8526 memfn_quals = TYPE_UNQUALIFIED;
8529 if (TREE_CODE (type) == FUNCTION_TYPE
8530 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8531 error ("cannot declare %s to qualified function type %qT",
8532 declarator->kind == cdk_reference ? "reference" : "pointer",
8535 if (declarator->kind == cdk_reference)
8537 /* In C++0x, the type we are creating a reference to might be
8538 a typedef which is itself a reference type. In that case,
8539 we follow the reference collapsing rules in
8540 [7.1.3/8 dcl.typedef] to create the final reference type:
8542 "If a typedef TD names a type that is a reference to a type
8543 T, an attempt to create the type 'lvalue reference to cv TD'
8544 creates the type 'lvalue reference to T,' while an attempt
8545 to create the type "rvalue reference to cv TD' creates the
8548 if (!VOID_TYPE_P (type))
8549 type = cp_build_reference_type
8550 ((TREE_CODE (type) == REFERENCE_TYPE
8551 ? TREE_TYPE (type) : type),
8552 (declarator->u.reference.rvalue_ref
8553 && (TREE_CODE(type) != REFERENCE_TYPE
8554 || TYPE_REF_IS_RVALUE (type))));
8556 /* In C++0x, we need this check for direct reference to
8557 reference declarations, which are forbidden by
8558 [8.3.2/5 dcl.ref]. Reference to reference declarations
8559 are only allowed indirectly through typedefs and template
8560 type arguments. Example:
8562 void foo(int & &); // invalid ref-to-ref decl
8564 typedef int & int_ref;
8565 void foo(int_ref &); // valid ref-to-ref decl
8567 if (inner_declarator && inner_declarator->kind == cdk_reference)
8568 error ("cannot declare reference to %q#T, which is not "
8569 "a typedef or a template type argument", type);
8571 else if (TREE_CODE (type) == METHOD_TYPE)
8572 type = build_ptrmemfunc_type (build_pointer_type (type));
8573 else if (declarator->kind == cdk_ptrmem)
8575 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8577 if (declarator->u.pointer.class_type == error_mark_node)
8578 /* We will already have complained. */
8579 type = error_mark_node;
8581 type = build_ptrmem_type (declarator->u.pointer.class_type,
8585 type = build_pointer_type (type);
8587 /* Process a list of type modifier keywords (such as
8588 const or volatile) that were given inside the `*' or `&'. */
8590 if (declarator->u.pointer.qualifiers)
8593 = cp_build_qualified_type (type,
8594 declarator->u.pointer.qualifiers);
8595 type_quals = cp_type_quals (type);
8608 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8609 && TREE_CODE (type) != FUNCTION_TYPE
8610 && TREE_CODE (type) != METHOD_TYPE)
8612 error ("template-id %qD used as a declarator",
8614 unqualified_id = dname;
8617 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8618 qualified with a class-name, turn it into a METHOD_TYPE, unless
8619 we know that the function is static. We take advantage of this
8620 opportunity to do other processing that pertains to entities
8621 explicitly declared to be class members. Note that if DECLARATOR
8622 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8623 would not have exited the loop above. */
8625 && declarator->u.id.qualifying_scope
8626 && TYPE_P (declarator->u.id.qualifying_scope))
8630 ctype = declarator->u.id.qualifying_scope;
8631 ctype = TYPE_MAIN_VARIANT (ctype);
8633 while (t != NULL_TREE && CLASS_TYPE_P (t))
8635 /* You're supposed to have one `template <...>' for every
8636 template class, but you don't need one for a full
8637 specialization. For example:
8639 template <class T> struct S{};
8640 template <> struct S<int> { void f(); };
8641 void S<int>::f () {}
8643 is correct; there shouldn't be a `template <>' for the
8644 definition of `S<int>::f'. */
8645 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8646 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8647 /* T is an explicit (not partial) specialization. All
8648 containing classes must therefore also be explicitly
8651 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8652 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8653 template_count += 1;
8655 t = TYPE_MAIN_DECL (t);
8656 t = DECL_CONTEXT (t);
8659 if (ctype == current_class_type)
8663 permerror (input_location, "member functions are implicitly friends of their class");
8667 permerror (declarator->id_loc,
8668 "extra qualification %<%T::%> on member %qs",
8671 else if (/* If the qualifying type is already complete, then we
8672 can skip the following checks. */
8673 !COMPLETE_TYPE_P (ctype)
8674 && (/* If the function is being defined, then
8675 qualifying type must certainly be complete. */
8677 /* A friend declaration of "T::f" is OK, even if
8678 "T" is a template parameter. But, if this
8679 function is not a friend, the qualifying type
8681 || (!friendp && !CLASS_TYPE_P (ctype))
8682 /* For a declaration, the type need not be
8683 complete, if either it is dependent (since there
8684 is no meaningful definition of complete in that
8685 case) or the qualifying class is currently being
8687 || !(dependent_type_p (ctype)
8688 || currently_open_class (ctype)))
8689 /* Check that the qualifying type is complete. */
8690 && !complete_type_or_else (ctype, NULL_TREE))
8691 return error_mark_node;
8692 else if (TREE_CODE (type) == FUNCTION_TYPE)
8694 tree sname = declarator->u.id.unqualified_name;
8696 if (current_class_type
8697 && (!friendp || funcdef_flag))
8700 ? "cannot define member function %<%T::%s%> within %<%T%>"
8701 : "cannot declare member function %<%T::%s%> within %<%T%>",
8702 ctype, name, current_class_type);
8703 return error_mark_node;
8706 /* It is not permitted to define a member function outside ist
8707 membership class as `constexpr'. */
8709 error ("a constexpr function cannot be defined "
8710 "outside of its class.");
8712 if (TREE_CODE (sname) == IDENTIFIER_NODE
8713 && NEW_DELETE_OPNAME_P (sname))
8714 /* Overloaded operator new and operator delete
8715 are always static functions. */
8718 type = build_memfn_type (type, ctype, memfn_quals);
8720 else if (declspecs->specs[(int)ds_typedef]
8721 && current_class_type)
8723 error ("cannot declare member %<%T::%s%> within %qT",
8724 ctype, name, current_class_type);
8725 return error_mark_node;
8729 /* Now TYPE has the actual type. */
8734 *attrlist = chainon (returned_attrs, *attrlist);
8736 attrlist = &returned_attrs;
8739 /* Handle parameter packs. */
8740 if (parameter_pack_p)
8742 if (decl_context == PARM)
8743 /* Turn the type into a pack expansion.*/
8744 type = make_pack_expansion (type);
8746 error ("non-parameter %qs cannot be a parameter pack", name);
8749 /* Did array size calculations overflow? */
8751 if (TREE_CODE (type) == ARRAY_TYPE
8752 && COMPLETE_TYPE_P (type)
8753 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8754 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8756 error ("size of array %qs is too large", name);
8757 /* If we proceed with the array type as it is, we'll eventually
8758 crash in tree_low_cst(). */
8759 type = error_mark_node;
8762 if ((decl_context == FIELD || decl_context == PARM)
8763 && !processing_template_decl
8764 && variably_modified_type_p (type, NULL_TREE))
8766 if (decl_context == FIELD)
8767 error ("data member may not have variably modified type %qT", type);
8769 error ("parameter may not have variably modified type %qT", type);
8770 type = error_mark_node;
8773 if (explicitp == 1 || (explicitp && friendp))
8775 /* [dcl.fct.spec] The explicit specifier shall only be used in
8776 declarations of constructors within a class definition. */
8777 error ("only declarations of constructors can be %<explicit%>");
8781 if (storage_class == sc_mutable)
8783 if (decl_context != FIELD || friendp)
8785 error ("non-member %qs cannot be declared %<mutable%>", name);
8786 storage_class = sc_none;
8788 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8790 error ("non-object member %qs cannot be declared %<mutable%>", name);
8791 storage_class = sc_none;
8793 else if (TREE_CODE (type) == FUNCTION_TYPE
8794 || TREE_CODE (type) == METHOD_TYPE)
8796 error ("function %qs cannot be declared %<mutable%>", name);
8797 storage_class = sc_none;
8801 error ("static %qs cannot be declared %<mutable%>", name);
8802 storage_class = sc_none;
8804 else if (type_quals & TYPE_QUAL_CONST)
8806 error ("const %qs cannot be declared %<mutable%>", name);
8807 storage_class = sc_none;
8811 /* If this is declaring a typedef name, return a TYPE_DECL. */
8812 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8816 /* Note that the grammar rejects storage classes
8817 in typenames, fields or parameters. */
8818 if (current_lang_name == lang_name_java)
8819 TYPE_FOR_JAVA (type) = 1;
8821 /* This declaration:
8823 typedef void f(int) const;
8825 declares a function type which is not a member of any
8826 particular class, but which is cv-qualified; for
8827 example "f S::*" declares a pointer to a const-qualified
8828 member function of S. We record the cv-qualification in the
8830 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8832 type = cp_build_qualified_type (type, memfn_quals);
8834 /* We have now dealt with these qualifiers. */
8835 memfn_quals = TYPE_UNQUALIFIED;
8838 if (decl_context == FIELD)
8839 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8841 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8842 if (id_declarator && declarator->u.id.qualifying_scope) {
8843 error_at (DECL_SOURCE_LOCATION (decl),
8844 "typedef name may not be a nested-name-specifier");
8845 TREE_TYPE (decl) = error_mark_node;
8848 if (decl_context != FIELD)
8850 if (!current_function_decl)
8851 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8852 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8853 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8854 (current_function_decl)))
8855 /* The TYPE_DECL is "abstract" because there will be
8856 clones of this constructor/destructor, and there will
8857 be copies of this TYPE_DECL generated in those
8859 DECL_ABSTRACT (decl) = 1;
8861 else if (constructor_name_p (unqualified_id, current_class_type))
8862 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8863 "as enclosing class",
8866 /* If the user declares "typedef struct {...} foo" then the
8867 struct will have an anonymous name. Fill that name in now.
8868 Nothing can refer to it, so nothing needs know about the name
8870 if (type != error_mark_node
8873 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8874 && TYPE_ANONYMOUS_P (type)
8875 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8879 /* Replace the anonymous name with the real name everywhere. */
8880 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8882 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8884 debug_hooks->set_name (t, decl);
8885 TYPE_NAME (t) = decl;
8889 if (TYPE_LANG_SPECIFIC (type))
8890 TYPE_WAS_ANONYMOUS (type) = 1;
8892 /* If this is a typedef within a template class, the nested
8893 type is a (non-primary) template. The name for the
8894 template needs updating as well. */
8895 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8896 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8897 = TYPE_IDENTIFIER (type);
8899 /* Adjust linkage now that we aren't anonymous anymore. */
8900 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
8901 determine_visibility (TYPE_MAIN_DECL (type));
8903 /* FIXME remangle member functions; member functions of a
8904 type with external linkage have external linkage. */
8908 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8909 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8911 bad_specifiers (decl, "type", virtualp,
8912 memfn_quals != TYPE_UNQUALIFIED,
8913 inlinep, friendp, raises != NULL_TREE);
8918 /* Detect the case of an array type of unspecified size
8919 which came, as such, direct from a typedef name.
8920 We must copy the type, so that the array's domain can be
8921 individually set by the object's initializer. */
8923 if (type && typedef_type
8924 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8925 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8926 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8928 /* Detect where we're using a typedef of function type to declare a
8929 function. PARMS will not be set, so we must create it now. */
8931 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8933 tree decls = NULL_TREE;
8936 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8938 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8940 TREE_CHAIN (decl) = decls;
8944 parms = nreverse (decls);
8946 if (decl_context != TYPENAME)
8948 /* A cv-qualifier-seq shall only be part of the function type
8949 for a non-static member function. [8.3.5/4 dcl.fct] */
8950 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8951 && (current_class_type == NULL_TREE || staticp) )
8954 ? G_("qualified function types cannot be used to "
8955 "declare static member functions")
8956 : G_("qualified function types cannot be used to "
8957 "declare free functions"));
8958 type = TYPE_MAIN_VARIANT (type);
8961 /* The qualifiers on the function type become the qualifiers on
8962 the non-static member function. */
8963 memfn_quals |= cp_type_quals (type);
8967 /* If this is a type name (such as, in a cast or sizeof),
8968 compute the type and return it now. */
8970 if (decl_context == TYPENAME)
8972 /* Note that the grammar rejects storage classes
8973 in typenames, fields or parameters. */
8974 if (type_quals != TYPE_UNQUALIFIED)
8975 type_quals = TYPE_UNQUALIFIED;
8977 /* Special case: "friend class foo" looks like a TYPENAME context. */
8980 if (type_quals != TYPE_UNQUALIFIED)
8982 error ("type qualifiers specified for friend class declaration");
8983 type_quals = TYPE_UNQUALIFIED;
8987 error ("%<inline%> specified for friend class declaration");
8993 /* Don't allow friend declaration without a class-key. */
8994 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8995 permerror (input_location, "template parameters cannot be friends");
8996 else if (TREE_CODE (type) == TYPENAME_TYPE)
8997 permerror (input_location, "friend declaration requires class-key, "
8998 "i.e. %<friend class %T::%D%>",
8999 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9001 permerror (input_location, "friend declaration requires class-key, "
9002 "i.e. %<friend %#T%>",
9006 /* Only try to do this stuff if we didn't already give up. */
9007 if (type != integer_type_node)
9009 /* A friendly class? */
9010 if (current_class_type)
9011 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9014 error ("trying to make class %qT a friend of global scope",
9017 type = void_type_node;
9020 else if (memfn_quals)
9022 if (ctype == NULL_TREE
9023 && TREE_CODE (type) == METHOD_TYPE)
9024 ctype = TYPE_METHOD_BASETYPE (type);
9027 type = build_memfn_type (type, ctype, memfn_quals);
9028 /* Core issue #547: need to allow this in template type args. */
9029 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9030 type = cp_build_qualified_type (type, memfn_quals);
9032 error ("invalid qualifiers on non-member function type");
9037 else if (unqualified_id == NULL_TREE && decl_context != PARM
9038 && decl_context != CATCHPARM
9039 && TREE_CODE (type) != UNION_TYPE
9042 error ("abstract declarator %qT used as declaration", type);
9043 return error_mark_node;
9046 /* Only functions may be declared using an operator-function-id. */
9048 && IDENTIFIER_OPNAME_P (unqualified_id)
9049 && TREE_CODE (type) != FUNCTION_TYPE
9050 && TREE_CODE (type) != METHOD_TYPE)
9052 error ("declaration of %qD as non-function", unqualified_id);
9053 return error_mark_node;
9056 /* We don't check parameter types here because we can emit a better
9057 error message later. */
9058 if (decl_context != PARM)
9060 type = check_var_type (unqualified_id, type);
9061 if (type == error_mark_node)
9062 return error_mark_node;
9065 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9066 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9068 if (decl_context == PARM || decl_context == CATCHPARM)
9070 if (ctype || in_namespace)
9071 error ("cannot use %<::%> in parameter declaration");
9073 /* A parameter declared as an array of T is really a pointer to T.
9074 One declared as a function is really a pointer to a function.
9075 One declared as a member is really a pointer to member. */
9077 if (TREE_CODE (type) == ARRAY_TYPE)
9079 /* Transfer const-ness of array into that of type pointed to. */
9080 type = build_pointer_type (TREE_TYPE (type));
9081 type_quals = TYPE_UNQUALIFIED;
9083 else if (TREE_CODE (type) == FUNCTION_TYPE)
9084 type = build_pointer_type (type);
9090 if (decl_context == PARM)
9092 decl = cp_build_parm_decl (unqualified_id, type);
9094 bad_specifiers (decl, "parameter", virtualp,
9095 memfn_quals != TYPE_UNQUALIFIED,
9096 inlinep, friendp, raises != NULL_TREE);
9098 else if (decl_context == FIELD)
9100 /* The C99 flexible array extension. */
9101 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9102 && TYPE_DOMAIN (type) == NULL_TREE)
9104 tree itype = compute_array_index_type (dname, integer_zero_node);
9105 type = build_cplus_array_type (TREE_TYPE (type), itype);
9108 if (type == error_mark_node)
9110 /* Happens when declaring arrays of sizes which
9111 are error_mark_node, for example. */
9114 else if (in_namespace && !friendp)
9116 /* Something like struct S { int N::j; }; */
9117 error ("invalid use of %<::%>");
9118 return error_mark_node;
9120 else if (TREE_CODE (type) == FUNCTION_TYPE)
9123 tree function_context;
9127 if (ctype == NULL_TREE)
9128 ctype = current_class_type;
9130 if (ctype == NULL_TREE)
9132 error ("can't make %qD into a method -- not in a class",
9134 return error_mark_node;
9137 /* ``A union may [ ... ] not [ have ] virtual functions.''
9139 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9141 error ("function %qD declared virtual inside a union",
9143 return error_mark_node;
9146 if (NEW_DELETE_OPNAME_P (unqualified_id))
9150 error ("%qD cannot be declared virtual, since it "
9156 else if (staticp < 2)
9157 type = build_memfn_type (type, ctype, memfn_quals);
9160 /* Check that the name used for a destructor makes sense. */
9161 if (sfk == sfk_destructor)
9163 tree uqname = id_declarator->u.id.unqualified_name;
9167 gcc_assert (friendp);
9168 error ("expected qualified name in friend declaration "
9169 "for destructor %qD", uqname);
9170 return error_mark_node;
9173 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9175 error ("declaration of %qD as member of %qT",
9177 return error_mark_node;
9180 error ("a destructor cannot be %<constexpr%>");
9182 else if (sfk == sfk_constructor && friendp)
9184 error ("expected qualified name in friend declaration "
9185 "for constructor %qD",
9186 id_declarator->u.id.unqualified_name);
9187 return error_mark_node;
9190 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9191 function_context = (ctype != NULL_TREE) ?
9192 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9193 publicp = (! friendp || ! staticp)
9194 && function_context == NULL_TREE;
9195 decl = grokfndecl (ctype, type,
9196 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9197 ? unqualified_id : dname,
9200 virtualp, flags, memfn_quals, raises,
9201 friendp ? -1 : 0, friendp, publicp,
9202 inlinep || constexpr_p,
9204 funcdef_flag, template_count, in_namespace,
9205 attrlist, declarator->id_loc);
9206 if (decl == NULL_TREE)
9207 return error_mark_node;
9209 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9210 /* The decl and setting of decl_attr is also turned off. */
9211 decl = build_decl_attribute_variant (decl, decl_attr);
9214 /* [class.conv.ctor]
9216 A constructor declared without the function-specifier
9217 explicit that can be called with a single parameter
9218 specifies a conversion from the type of its first
9219 parameter to the type of its class. Such a constructor
9220 is called a converting constructor. */
9222 DECL_NONCONVERTING_P (decl) = 1;
9224 else if (TREE_CODE (type) == METHOD_TYPE)
9226 /* We only get here for friend declarations of
9227 members of other classes. */
9228 /* All method decls are public, so tell grokfndecl to set
9229 TREE_PUBLIC, also. */
9230 decl = grokfndecl (ctype, type,
9231 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9232 ? unqualified_id : dname,
9235 virtualp, flags, memfn_quals, raises,
9236 friendp ? -1 : 0, friendp, 1, 0, sfk,
9237 funcdef_flag, template_count, in_namespace,
9239 declarator->id_loc);
9240 if (decl == NULL_TREE)
9241 return error_mark_node;
9243 else if (!staticp && !dependent_type_p (type)
9244 && !COMPLETE_TYPE_P (complete_type (type))
9245 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9248 error ("field %qD has incomplete type", unqualified_id);
9250 error ("name %qT has incomplete type", type);
9252 /* If we're instantiating a template, tell them which
9253 instantiation made the field's type be incomplete. */
9254 if (current_class_type
9255 && TYPE_NAME (current_class_type)
9256 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9258 && declspecs->type == type)
9259 error (" in instantiation of template %qT",
9260 current_class_type);
9262 return error_mark_node;
9268 error ("%qE is neither function nor member function; "
9269 "cannot be declared friend", unqualified_id);
9277 /* Friends are treated specially. */
9278 if (ctype == current_class_type)
9279 ; /* We already issued a permerror. */
9280 else if (decl && DECL_NAME (decl))
9282 if (template_class_depth (current_class_type) == 0)
9284 decl = check_explicit_specialization
9285 (unqualified_id, decl, template_count,
9286 2 * funcdef_flag + 4);
9287 if (decl == error_mark_node)
9288 return error_mark_node;
9291 decl = do_friend (ctype, unqualified_id, decl,
9294 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9298 return error_mark_node;
9301 /* Structure field. It may not be a function, except for C++. */
9303 if (decl == NULL_TREE)
9309 /* An attempt is being made to initialize a non-static
9310 member. But, from [class.mem]:
9312 4 A member-declarator can contain a
9313 constant-initializer only if it declares a static
9314 member (_class.static_) of integral or enumeration
9315 type, see _class.static.data_.
9317 This used to be relatively common practice, but
9318 the rest of the compiler does not correctly
9319 handle the initialization unless the member is
9320 static so we make it static below. */
9321 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9323 permerror (input_location, "making %qD static", unqualified_id);
9327 if (uses_template_parms (type))
9328 /* We'll check at instantiation time. */
9330 else if (check_static_variable_definition (unqualified_id,
9332 /* If we just return the declaration, crashes
9333 will sometimes occur. We therefore return
9334 void_type_node, as if this was a friend
9335 declaration, to cause callers to completely
9336 ignore this declaration. */
9337 return error_mark_node;
9342 /* C++ allows static class members. All other work
9343 for this is done by grokfield. */
9344 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9345 set_linkage_for_static_data_member (decl);
9346 /* Even if there is an in-class initialization, DECL
9347 is considered undefined until an out-of-class
9348 definition is provided. */
9349 DECL_EXTERNAL (decl) = 1;
9352 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9357 error ("non-static data member %qE declared %<constexpr%>",
9359 decl = build_decl (input_location,
9360 FIELD_DECL, unqualified_id, type);
9361 DECL_NONADDRESSABLE_P (decl) = bitfield;
9362 if (bitfield && !unqualified_id)
9363 TREE_NO_WARNING (decl) = 1;
9365 if (storage_class == sc_mutable)
9367 DECL_MUTABLE_P (decl) = 1;
9368 storage_class = sc_none;
9372 bad_specifiers (decl, "field", virtualp,
9373 memfn_quals != TYPE_UNQUALIFIED,
9374 inlinep, friendp, raises != NULL_TREE);
9377 else if (TREE_CODE (type) == FUNCTION_TYPE
9378 || TREE_CODE (type) == METHOD_TYPE)
9383 if (!unqualified_id)
9384 return error_mark_node;
9386 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9387 original_name = dname;
9389 original_name = unqualified_id;
9391 if (storage_class == sc_auto)
9392 error ("storage class %<auto%> invalid for function %qs", name);
9393 else if (storage_class == sc_register)
9394 error ("storage class %<register%> invalid for function %qs", name);
9396 error ("storage class %<__thread%> invalid for function %qs", name);
9398 /* Function declaration not at top level.
9399 Storage classes other than `extern' are not allowed
9400 and `extern' makes no difference. */
9401 if (! toplevel_bindings_p ()
9402 && (storage_class == sc_static
9403 || declspecs->specs[(int)ds_inline])
9406 if (storage_class == sc_static)
9407 pedwarn (input_location, OPT_pedantic,
9408 "%<static%> specified invalid for function %qs "
9409 "declared out of global scope", name);
9411 pedwarn (input_location, OPT_pedantic,
9412 "%<inline%> specifier invalid for function %qs "
9413 "declared out of global scope", name);
9416 if (ctype != NULL_TREE
9417 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9419 error ("%q#T is not a class or a namespace", ctype);
9423 if (ctype == NULL_TREE)
9427 error ("virtual non-class function %qs", name);
9430 else if (sfk == sfk_constructor
9431 || sfk == sfk_destructor)
9434 ? "%qs defined in a non-class scope"
9435 : "%qs declared in a non-class scope", name);
9439 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9440 && !NEW_DELETE_OPNAME_P (original_name))
9441 type = build_method_type_directly (ctype,
9443 TYPE_ARG_TYPES (type));
9445 /* Record presence of `static'. */
9446 publicp = (ctype != NULL_TREE
9447 || storage_class == sc_extern
9448 || storage_class != sc_static);
9450 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9451 virtualp, flags, memfn_quals, raises,
9453 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9454 template_count, in_namespace, attrlist,
9455 declarator->id_loc);
9456 if (decl == NULL_TREE)
9457 return error_mark_node;
9461 int invalid_static = 0;
9463 /* Don't allow a static member function in a class, and forbid
9464 declaring main to be static. */
9465 if (TREE_CODE (type) == METHOD_TYPE)
9467 permerror (input_location, "cannot declare member function %qD to have "
9468 "static linkage", decl);
9471 else if (current_function_decl)
9473 /* FIXME need arm citation */
9474 error ("cannot declare static function inside another function");
9481 storage_class = sc_none;
9487 /* It's a variable. */
9489 /* An uninitialized decl with `extern' is a reference. */
9490 decl = grokvardecl (type, unqualified_id,
9493 (type_quals & TYPE_QUAL_CONST) != 0,
9494 ctype ? ctype : in_namespace);
9495 bad_specifiers (decl, "variable", virtualp,
9496 memfn_quals != TYPE_UNQUALIFIED,
9497 inlinep, friendp, raises != NULL_TREE);
9501 DECL_CONTEXT (decl) = ctype;
9504 permerror (input_location, "%<static%> may not be used when defining "
9505 "(as opposed to declaring) a static data member");
9507 storage_class = sc_none;
9509 if (storage_class == sc_register && TREE_STATIC (decl))
9511 error ("static member %qD declared %<register%>", decl);
9512 storage_class = sc_none;
9514 if (storage_class == sc_extern && pedantic)
9516 pedwarn (input_location, OPT_pedantic,
9517 "cannot explicitly declare member %q#D to have "
9518 "extern linkage", decl);
9519 storage_class = sc_none;
9524 if (storage_class == sc_extern && initialized && !funcdef_flag)
9526 if (toplevel_bindings_p ())
9528 /* It's common practice (and completely valid) to have a const
9529 be initialized and declared extern. */
9530 if (!(type_quals & TYPE_QUAL_CONST))
9531 warning (0, "%qs initialized and declared %<extern%>", name);
9535 error ("%qs has both %<extern%> and initializer", name);
9536 return error_mark_node;
9540 /* Record `register' declaration for warnings on &
9541 and in case doing stupid register allocation. */
9543 if (storage_class == sc_register)
9544 DECL_REGISTER (decl) = 1;
9545 else if (storage_class == sc_extern)
9546 DECL_THIS_EXTERN (decl) = 1;
9547 else if (storage_class == sc_static)
9548 DECL_THIS_STATIC (decl) = 1;
9550 /* Don't forget constexprness. */
9551 if (VAR_OR_FUNCTION_DECL_P (decl))
9552 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9554 /* Record constancy and volatility on the DECL itself . There's
9555 no need to do this when processing a template; we'll do this
9556 for the instantiated declaration based on the type of DECL. */
9557 if (!processing_template_decl)
9558 cp_apply_type_quals_to_decl (type_quals, decl);
9564 /* Subroutine of start_function. Ensure that each of the parameter
9565 types (as listed in PARMS) is complete, as is required for a
9566 function definition. */
9569 require_complete_types_for_parms (tree parms)
9571 for (; parms; parms = TREE_CHAIN (parms))
9573 if (dependent_type_p (TREE_TYPE (parms)))
9575 if (!VOID_TYPE_P (TREE_TYPE (parms))
9576 && complete_type_or_else (TREE_TYPE (parms), parms))
9578 relayout_decl (parms);
9579 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9582 /* grokparms or complete_type_or_else will have already issued
9584 TREE_TYPE (parms) = error_mark_node;
9588 /* Returns nonzero if T is a local variable. */
9591 local_variable_p (const_tree t)
9593 if ((TREE_CODE (t) == VAR_DECL
9594 /* A VAR_DECL with a context that is a _TYPE is a static data
9596 && !TYPE_P (CP_DECL_CONTEXT (t))
9597 /* Any other non-local variable must be at namespace scope. */
9598 && !DECL_NAMESPACE_SCOPE_P (t))
9599 || (TREE_CODE (t) == PARM_DECL))
9605 /* Like local_variable_p, but suitable for use as a tree-walking
9609 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9610 void *data ATTRIBUTE_UNUSED)
9612 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9614 else if (TYPE_P (*tp))
9621 /* Check that ARG, which is a default-argument expression for a
9622 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9623 something goes wrong. DECL may also be a _TYPE node, rather than a
9624 DECL, if there is no DECL available. */
9627 check_default_argument (tree decl, tree arg)
9632 if (TREE_CODE (arg) == DEFAULT_ARG)
9633 /* We get a DEFAULT_ARG when looking at an in-class declaration
9634 with a default argument. Ignore the argument for now; we'll
9635 deal with it after the class is complete. */
9644 decl_type = TREE_TYPE (decl);
9646 if (arg == error_mark_node
9647 || decl == error_mark_node
9648 || TREE_TYPE (arg) == error_mark_node
9649 || decl_type == error_mark_node)
9650 /* Something already went wrong. There's no need to check
9652 return error_mark_node;
9654 /* [dcl.fct.default]
9656 A default argument expression is implicitly converted to the
9658 if (!TREE_TYPE (arg)
9659 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9662 error ("default argument for %q#D has type %qT",
9663 decl, TREE_TYPE (arg));
9665 error ("default argument for parameter of type %qT has type %qT",
9666 decl_type, TREE_TYPE (arg));
9668 return error_mark_node;
9671 /* [dcl.fct.default]
9673 Local variables shall not be used in default argument
9676 The keyword `this' shall not be used in a default argument of a
9678 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9681 error ("default argument %qE uses local variable %qD", arg, var);
9682 return error_mark_node;
9689 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9692 type_is_deprecated (tree type)
9694 enum tree_code code;
9695 if (TREE_DEPRECATED (type))
9697 if (TYPE_NAME (type)
9698 && TREE_DEPRECATED (TYPE_NAME (type)))
9701 code = TREE_CODE (type);
9703 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9704 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9705 || code == METHOD_TYPE || code == ARRAY_TYPE)
9706 return type_is_deprecated (TREE_TYPE (type));
9708 if (TYPE_PTRMEMFUNC_P (type))
9709 return type_is_deprecated
9710 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9715 /* Decode the list of parameter types for a function type.
9716 Given the list of things declared inside the parens,
9717 return a list of types.
9719 If this parameter does not end with an ellipsis, we append
9722 *PARMS is set to the chain of PARM_DECLs created. */
9725 grokparms (tree parmlist, tree *parms)
9727 tree result = NULL_TREE;
9728 tree decls = NULL_TREE;
9732 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9734 tree type = NULL_TREE;
9735 tree init = TREE_PURPOSE (parm);
9736 tree decl = TREE_VALUE (parm);
9739 if (parm == void_list_node)
9742 if (! decl || TREE_TYPE (decl) == error_mark_node)
9745 type = TREE_TYPE (decl);
9746 if (VOID_TYPE_P (type))
9748 if (same_type_p (type, void_type_node)
9749 && DECL_SELF_REFERENCE_P (type)
9750 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9751 /* this is a parmlist of `(void)', which is ok. */
9753 cxx_incomplete_type_error (decl, type);
9754 /* It's not a good idea to actually create parameters of
9755 type `void'; other parts of the compiler assume that a
9756 void type terminates the parameter list. */
9757 type = error_mark_node;
9758 TREE_TYPE (decl) = error_mark_node;
9761 if (type != error_mark_node
9762 && TYPE_FOR_JAVA (type)
9763 && MAYBE_CLASS_TYPE_P (type))
9765 error ("parameter %qD has Java class type", decl);
9766 type = error_mark_node;
9767 TREE_TYPE (decl) = error_mark_node;
9771 if (type != error_mark_node
9772 && (errmsg = targetm.invalid_parameter_type (type)))
9775 type = error_mark_node;
9776 TREE_TYPE (decl) = error_mark_node;
9779 if (type != error_mark_node)
9781 if (deprecated_state != DEPRECATED_SUPPRESS)
9783 tree deptype = type_is_deprecated (type);
9785 warn_deprecated_use (deptype, NULL_TREE);
9788 /* Top-level qualifiers on the parameters are
9789 ignored for function types. */
9790 type = cp_build_qualified_type (type, 0);
9791 if (TREE_CODE (type) == METHOD_TYPE)
9793 error ("parameter %qD invalidly declared method type", decl);
9794 type = build_pointer_type (type);
9795 TREE_TYPE (decl) = type;
9797 else if (abstract_virtuals_error (decl, type))
9798 any_error = 1; /* Seems like a good idea. */
9799 else if (POINTER_TYPE_P (type))
9801 /* [dcl.fct]/6, parameter types cannot contain pointers
9802 (references) to arrays of unknown bound. */
9803 tree t = TREE_TYPE (type);
9804 int ptr = TYPE_PTR_P (type);
9810 else if (TREE_CODE (t) != ARRAY_TYPE)
9812 else if (!TYPE_DOMAIN (t))
9816 if (TREE_CODE (t) == ARRAY_TYPE)
9817 error ("parameter %qD includes %s to array of unknown "
9819 decl, ptr ? "pointer" : "reference", t);
9824 else if (init && !processing_template_decl)
9825 init = check_default_argument (decl, init);
9828 if (TREE_CODE (decl) == PARM_DECL
9829 && FUNCTION_PARAMETER_PACK_P (decl)
9830 && TREE_CHAIN (parm)
9831 && TREE_CHAIN (parm) != void_list_node)
9832 error ("parameter packs must be at the end of the parameter list");
9834 TREE_CHAIN (decl) = decls;
9836 result = tree_cons (init, type, result);
9838 decls = nreverse (decls);
9839 result = nreverse (result);
9841 result = chainon (result, void_list_node);
9848 /* D is a constructor or overloaded `operator='.
9850 Let T be the class in which D is declared. Then, this function
9853 -1 if D's is an ill-formed constructor or copy assignment operator
9854 whose first parameter is of type `T'.
9855 0 if D is not a copy constructor or copy assignment
9857 1 if D is a copy constructor or copy assignment operator whose
9858 first parameter is a reference to const qualified T.
9859 2 if D is a copy constructor or copy assignment operator whose
9860 first parameter is a reference to non-const qualified T.
9862 This function can be used as a predicate. Positive values indicate
9863 a copy constructor and nonzero values indicate a copy assignment
9867 copy_fn_p (const_tree d)
9873 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9875 if (TREE_CODE (d) == TEMPLATE_DECL
9876 || (DECL_TEMPLATE_INFO (d)
9877 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9878 /* Instantiations of template member functions are never copy
9879 functions. Note that member functions of templated classes are
9880 represented as template functions internally, and we must
9881 accept those as copy functions. */
9884 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9888 arg_type = TREE_VALUE (args);
9889 if (arg_type == error_mark_node)
9892 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9894 /* Pass by value copy assignment operator. */
9897 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9898 && !TYPE_REF_IS_RVALUE (arg_type)
9899 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9901 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9907 args = TREE_CHAIN (args);
9909 if (args && args != void_list_node && !TREE_PURPOSE (args))
9910 /* There are more non-optional args. */
9916 /* D is a constructor or overloaded `operator='.
9918 Let T be the class in which D is declared. Then, this function
9919 returns true when D is a move constructor or move assignment
9920 operator, false otherwise. */
9923 move_fn_p (const_tree d)
9927 bool result = false;
9929 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9931 if (cxx_dialect == cxx98)
9932 /* There are no move constructors if we are in C++98 mode. */
9935 if (TREE_CODE (d) == TEMPLATE_DECL
9936 || (DECL_TEMPLATE_INFO (d)
9937 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9938 /* Instantiations of template member functions are never copy
9939 functions. Note that member functions of templated classes are
9940 represented as template functions internally, and we must
9941 accept those as copy functions. */
9944 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9948 arg_type = TREE_VALUE (args);
9949 if (arg_type == error_mark_node)
9952 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9953 && TYPE_REF_IS_RVALUE (arg_type)
9954 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9958 args = TREE_CHAIN (args);
9960 if (args && args != void_list_node && !TREE_PURPOSE (args))
9961 /* There are more non-optional args. */
9967 /* Remember any special properties of member function DECL. */
9970 grok_special_member_properties (tree decl)
9974 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9977 class_type = DECL_CONTEXT (decl);
9978 if (DECL_CONSTRUCTOR_P (decl))
9980 int ctor = copy_fn_p (decl);
9982 if (!DECL_ARTIFICIAL (decl))
9983 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9989 A non-template constructor for class X is a copy
9990 constructor if its first parameter is of type X&, const
9991 X&, volatile X& or const volatile X&, and either there
9992 are no other parameters or else all other parameters have
9993 default arguments. */
9994 TYPE_HAS_INIT_REF (class_type) = 1;
9995 if (!DECL_DEFAULTED_FN (decl))
9996 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9998 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10000 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10002 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10003 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
10004 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10006 else if (is_list_ctor (decl))
10007 TYPE_HAS_LIST_CTOR (class_type) = 1;
10009 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10013 A non-template assignment operator for class X is a copy
10014 assignment operator if its parameter is of type X, X&, const
10015 X&, volatile X& or const volatile X&. */
10017 int assop = copy_fn_p (decl);
10021 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10022 if (!DECL_DEFAULTED_FN (decl))
10023 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10025 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10030 /* Check a constructor DECL has the correct form. Complains
10031 if the class has a constructor of the form X(X). */
10034 grok_ctor_properties (const_tree ctype, const_tree decl)
10036 int ctor_parm = copy_fn_p (decl);
10042 A declaration of a constructor for a class X is ill-formed if
10043 its first parameter is of type (optionally cv-qualified) X
10044 and either there are no other parameters or else all other
10045 parameters have default arguments.
10047 We *don't* complain about member template instantiations that
10048 have this form, though; they can occur as we try to decide
10049 what constructor to use during overload resolution. Since
10050 overload resolution will never prefer such a constructor to
10051 the non-template copy constructor (which is either explicitly
10052 or implicitly defined), there's no need to worry about their
10053 existence. Theoretically, they should never even be
10054 instantiated, but that's hard to forestall. */
10055 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10063 /* An operator with this code is unary, but can also be binary. */
10066 ambi_op_p (enum tree_code code)
10068 return (code == INDIRECT_REF
10069 || code == ADDR_EXPR
10070 || code == UNARY_PLUS_EXPR
10071 || code == NEGATE_EXPR
10072 || code == PREINCREMENT_EXPR
10073 || code == PREDECREMENT_EXPR);
10076 /* An operator with this name can only be unary. */
10079 unary_op_p (enum tree_code code)
10081 return (code == TRUTH_NOT_EXPR
10082 || code == BIT_NOT_EXPR
10083 || code == COMPONENT_REF
10084 || code == TYPE_EXPR);
10087 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10088 errors are issued for invalid declarations. */
10091 grok_op_properties (tree decl, bool complain)
10093 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10095 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10096 tree name = DECL_NAME (decl);
10097 enum tree_code operator_code;
10102 /* Count the number of arguments and check for ellipsis. */
10103 for (argtype = argtypes, arity = 0;
10104 argtype && argtype != void_list_node;
10105 argtype = TREE_CHAIN (argtype))
10107 ellipsis_p = !argtype;
10109 class_type = DECL_CONTEXT (decl);
10110 if (class_type && !CLASS_TYPE_P (class_type))
10111 class_type = NULL_TREE;
10113 if (DECL_CONV_FN_P (decl))
10114 operator_code = TYPE_EXPR;
10118 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10119 if (ansi_opname (CODE) == name) \
10121 operator_code = (CODE); \
10124 else if (ansi_assopname (CODE) == name) \
10126 operator_code = (CODE); \
10127 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10131 #include "operators.def"
10132 #undef DEF_OPERATOR
10134 gcc_unreachable ();
10137 gcc_assert (operator_code != MAX_TREE_CODES);
10138 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10141 switch (operator_code)
10144 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10148 TYPE_GETS_DELETE (class_type) |= 1;
10152 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10155 case VEC_DELETE_EXPR:
10156 TYPE_GETS_DELETE (class_type) |= 2;
10163 /* [basic.std.dynamic.allocation]/1:
10165 A program is ill-formed if an allocation function is declared
10166 in a namespace scope other than global scope or declared static
10169 The same also holds true for deallocation functions. */
10170 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10171 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10173 if (DECL_NAMESPACE_SCOPE_P (decl))
10175 if (CP_DECL_CONTEXT (decl) != global_namespace)
10177 error ("%qD may not be declared within a namespace", decl);
10180 else if (!TREE_PUBLIC (decl))
10182 error ("%qD may not be declared as static", decl);
10188 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10190 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10191 DECL_IS_OPERATOR_NEW (decl) = 1;
10193 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10194 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10197 /* An operator function must either be a non-static member function
10198 or have at least one parameter of a class, a reference to a class,
10199 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10200 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10202 if (operator_code == TYPE_EXPR
10203 || operator_code == CALL_EXPR
10204 || operator_code == COMPONENT_REF
10205 || operator_code == ARRAY_REF
10206 || operator_code == NOP_EXPR)
10208 error ("%qD must be a nonstatic member function", decl);
10215 if (DECL_STATIC_FUNCTION_P (decl))
10217 error ("%qD must be either a non-static member "
10218 "function or a non-member function", decl);
10222 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10224 tree arg = non_reference (TREE_VALUE (p));
10225 if (arg == error_mark_node)
10228 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10229 because these checks are performed even on
10230 template functions. */
10231 if (MAYBE_CLASS_TYPE_P (arg)
10232 || TREE_CODE (arg) == ENUMERAL_TYPE)
10236 if (!p || p == void_list_node)
10239 error ("%qD must have an argument of class or "
10240 "enumerated type", decl);
10246 /* There are no restrictions on the arguments to an overloaded
10248 if (operator_code == CALL_EXPR)
10251 /* Warn about conversion operators that will never be used. */
10252 if (IDENTIFIER_TYPENAME_P (name)
10253 && ! DECL_TEMPLATE_INFO (decl)
10255 /* Warn only declaring the function; there is no need to
10256 warn again about out-of-class definitions. */
10257 && class_type == current_class_type)
10259 tree t = TREE_TYPE (name);
10260 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10261 const char *what = 0;
10264 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10266 if (TREE_CODE (t) == VOID_TYPE)
10268 else if (class_type)
10270 if (t == class_type)
10271 what = "the same type";
10272 /* Don't force t to be complete here. */
10273 else if (MAYBE_CLASS_TYPE_P (t)
10274 && COMPLETE_TYPE_P (t)
10275 && DERIVED_FROM_P (t, class_type))
10276 what = "a base class";
10280 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10281 "conversion operator",
10282 ref ? "a reference to " : "", what);
10285 if (operator_code == COND_EXPR)
10288 error ("ISO C++ prohibits overloading operator ?:");
10291 else if (ellipsis_p)
10293 error ("%qD must not have variable number of arguments", decl);
10296 else if (ambi_op_p (operator_code))
10299 /* We pick the one-argument operator codes by default, so
10300 we don't have to change anything. */
10302 else if (arity == 2)
10304 /* If we thought this was a unary operator, we now know
10305 it to be a binary operator. */
10306 switch (operator_code)
10309 operator_code = MULT_EXPR;
10313 operator_code = BIT_AND_EXPR;
10316 case UNARY_PLUS_EXPR:
10317 operator_code = PLUS_EXPR;
10321 operator_code = MINUS_EXPR;
10324 case PREINCREMENT_EXPR:
10325 operator_code = POSTINCREMENT_EXPR;
10328 case PREDECREMENT_EXPR:
10329 operator_code = POSTDECREMENT_EXPR;
10333 gcc_unreachable ();
10336 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10338 if ((operator_code == POSTINCREMENT_EXPR
10339 || operator_code == POSTDECREMENT_EXPR)
10340 && ! processing_template_decl
10341 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10344 error ("postfix %qD must take %<int%> as its argument",
10347 error ("postfix %qD must take %<int%> as its second "
10355 error ("%qD must take either zero or one argument", decl);
10357 error ("%qD must take either one or two arguments", decl);
10361 /* More Effective C++ rule 6. */
10363 && (operator_code == POSTINCREMENT_EXPR
10364 || operator_code == POSTDECREMENT_EXPR
10365 || operator_code == PREINCREMENT_EXPR
10366 || operator_code == PREDECREMENT_EXPR))
10368 tree arg = TREE_VALUE (argtypes);
10369 tree ret = TREE_TYPE (TREE_TYPE (decl));
10370 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10371 arg = TREE_TYPE (arg);
10372 arg = TYPE_MAIN_VARIANT (arg);
10373 if (operator_code == PREINCREMENT_EXPR
10374 || operator_code == PREDECREMENT_EXPR)
10376 if (TREE_CODE (ret) != REFERENCE_TYPE
10377 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10379 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10380 build_reference_type (arg));
10384 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10385 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10389 else if (unary_op_p (operator_code))
10394 error ("%qD must take %<void%>", decl);
10396 error ("%qD must take exactly one argument", decl);
10400 else /* if (binary_op_p (operator_code)) */
10405 error ("%qD must take exactly one argument", decl);
10407 error ("%qD must take exactly two arguments", decl);
10411 /* More Effective C++ rule 7. */
10413 && (operator_code == TRUTH_ANDIF_EXPR
10414 || operator_code == TRUTH_ORIF_EXPR
10415 || operator_code == COMPOUND_EXPR))
10416 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10420 /* Effective C++ rule 23. */
10423 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10424 && (operator_code == PLUS_EXPR
10425 || operator_code == MINUS_EXPR
10426 || operator_code == TRUNC_DIV_EXPR
10427 || operator_code == MULT_EXPR
10428 || operator_code == TRUNC_MOD_EXPR)
10429 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10430 warning (OPT_Weffc__, "%qD should return by value", decl);
10432 /* [over.oper]/8 */
10433 for (; argtypes && argtypes != void_list_node;
10434 argtypes = TREE_CHAIN (argtypes))
10435 if (TREE_PURPOSE (argtypes))
10437 TREE_PURPOSE (argtypes) = NULL_TREE;
10438 if (operator_code == POSTINCREMENT_EXPR
10439 || operator_code == POSTDECREMENT_EXPR)
10441 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10446 error ("%qD cannot have default arguments", decl);
10454 /* Return a string giving the keyword associate with CODE. */
10456 static const char *
10457 tag_name (enum tag_types code)
10469 case typename_type:
10472 gcc_unreachable ();
10476 /* Name lookup in an elaborated-type-specifier (after the keyword
10477 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10478 elaborated-type-specifier is invalid, issue a diagnostic and return
10479 error_mark_node; otherwise, return the *_TYPE to which it referred.
10480 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10483 check_elaborated_type_specifier (enum tag_types tag_code,
10485 bool allow_template_p)
10491 struct S { struct S *p; };
10493 name lookup will find the TYPE_DECL for the implicit "S::S"
10494 typedef. Adjust for that here. */
10495 if (DECL_SELF_REFERENCE_P (decl))
10496 decl = TYPE_NAME (TREE_TYPE (decl));
10498 type = TREE_TYPE (decl);
10500 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10501 is false for this case as well. */
10502 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10504 error ("using template type parameter %qT after %qs",
10505 type, tag_name (tag_code));
10506 return error_mark_node;
10510 If the identifier resolves to a typedef-name or a template
10511 type-parameter, the elaborated-type-specifier is ill-formed.
10513 In other words, the only legitimate declaration to use in the
10514 elaborated type specifier is the implicit typedef created when
10515 the type is declared. */
10516 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10517 && tag_code != typename_type)
10519 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10520 error ("%q+D has a previous declaration here", decl);
10521 return error_mark_node;
10523 else if (TREE_CODE (type) != RECORD_TYPE
10524 && TREE_CODE (type) != UNION_TYPE
10525 && tag_code != enum_type
10526 && tag_code != typename_type)
10528 error ("%qT referred to as %qs", type, tag_name (tag_code));
10529 error ("%q+T has a previous declaration here", type);
10530 return error_mark_node;
10532 else if (TREE_CODE (type) != ENUMERAL_TYPE
10533 && tag_code == enum_type)
10535 error ("%qT referred to as enum", type);
10536 error ("%q+T has a previous declaration here", type);
10537 return error_mark_node;
10539 else if (!allow_template_p
10540 && TREE_CODE (type) == RECORD_TYPE
10541 && CLASSTYPE_IS_TEMPLATE (type))
10543 /* If a class template appears as elaborated type specifier
10544 without a template header such as:
10546 template <class T> class C {};
10547 void f(class C); // No template header here
10549 then the required template argument is missing. */
10550 error ("template argument required for %<%s %T%>",
10551 tag_name (tag_code),
10552 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10553 return error_mark_node;
10559 /* Lookup NAME in elaborate type specifier in scope according to
10560 SCOPE and issue diagnostics if necessary.
10561 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10562 found, and ERROR_MARK_NODE for type error. */
10565 lookup_and_check_tag (enum tag_types tag_code, tree name,
10566 tag_scope scope, bool template_header_p)
10570 if (scope == ts_global)
10572 /* First try ordinary name lookup, ignoring hidden class name
10573 injected via friend declaration. */
10574 decl = lookup_name_prefer_type (name, 2);
10575 /* If that fails, the name will be placed in the smallest
10576 non-class, non-function-prototype scope according to 3.3.1/5.
10577 We may already have a hidden name declared as friend in this
10578 scope. So lookup again but not ignoring hidden names.
10579 If we find one, that name will be made visible rather than
10580 creating a new tag. */
10582 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10585 decl = lookup_type_scope (name, scope);
10587 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10588 decl = DECL_TEMPLATE_RESULT (decl);
10590 if (decl && TREE_CODE (decl) == TYPE_DECL)
10592 /* Look for invalid nested type:
10596 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10598 error ("%qD has the same name as the class in which it is "
10601 return error_mark_node;
10604 /* Two cases we need to consider when deciding if a class
10605 template is allowed as an elaborated type specifier:
10606 1. It is a self reference to its own class.
10607 2. It comes with a template header.
10611 template <class T> class C {
10612 class C *c1; // DECL_SELF_REFERENCE_P is true
10615 template <class U> class C; // template_header_p is true
10616 template <class T> class C<T>::D {
10617 class C *c2; // DECL_SELF_REFERENCE_P is true
10620 t = check_elaborated_type_specifier (tag_code,
10623 | DECL_SELF_REFERENCE_P (decl));
10626 else if (decl && TREE_CODE (decl) == TREE_LIST)
10628 error ("reference to %qD is ambiguous", name);
10629 print_candidates (decl);
10630 return error_mark_node;
10636 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10637 Define the tag as a forward-reference if it is not defined.
10639 If a declaration is given, process it here, and report an error if
10640 multiple declarations are not identical.
10642 SCOPE is TS_CURRENT when this is also a definition. Only look in
10643 the current frame for the name (since C++ allows new names in any
10644 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10645 declaration. Only look beginning from the current scope outward up
10646 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10648 TEMPLATE_HEADER_P is true when this declaration is preceded by
10649 a set of template parameters. */
10652 xref_tag (enum tag_types tag_code, tree name,
10653 tag_scope scope, bool template_header_p)
10655 enum tree_code code;
10657 tree context = NULL_TREE;
10659 timevar_push (TV_NAME_LOOKUP);
10661 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10667 code = RECORD_TYPE;
10673 code = ENUMERAL_TYPE;
10676 gcc_unreachable ();
10679 /* In case of anonymous name, xref_tag is only called to
10680 make type node and push name. Name lookup is not required. */
10681 if (ANON_AGGRNAME_P (name))
10684 t = lookup_and_check_tag (tag_code, name,
10685 scope, template_header_p);
10687 if (t == error_mark_node)
10688 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10690 if (scope != ts_current && t && current_class_type
10691 && template_class_depth (current_class_type)
10692 && template_header_p)
10694 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10695 definition of this tag. Since, in addition, we are currently
10696 processing a (member) template declaration of a template
10697 class, we must be very careful; consider:
10704 { template <class V>
10705 friend struct S1; };
10707 Here, the S2::S1 declaration should not be confused with the
10708 outer declaration. In particular, the inner version should
10709 have a template parameter of level 2, not level 1. This
10710 would be particularly important if the member declaration
10713 template <class V = U> friend struct S1;
10715 say, when we should tsubst into `U' when instantiating
10716 S2. On the other hand, when presented with:
10726 we must find the inner binding eventually. We
10727 accomplish this by making sure that the new type we
10728 create to represent this declaration has the right
10730 context = TYPE_CONTEXT (t);
10736 /* If no such tag is yet defined, create a forward-reference node
10737 and record it as the "definition".
10738 When a real declaration of this type is found,
10739 the forward-reference will be altered into a real type. */
10740 if (code == ENUMERAL_TYPE)
10742 error ("use of enum %q#D without previous declaration", name);
10743 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10747 t = make_class_type (code);
10748 TYPE_CONTEXT (t) = context;
10749 t = pushtag (name, t, scope);
10754 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10756 if (!redeclare_class_template (t, current_template_parms))
10757 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10759 else if (!processing_template_decl
10760 && CLASS_TYPE_P (t)
10761 && CLASSTYPE_IS_TEMPLATE (t))
10763 error ("redeclaration of %qT as a non-template", t);
10764 error ("previous declaration %q+D", t);
10765 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10768 /* Make injected friend class visible. */
10769 if (scope != ts_within_enclosing_non_class
10770 && hidden_name_p (TYPE_NAME (t)))
10772 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10773 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10775 if (TYPE_TEMPLATE_INFO (t))
10777 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10778 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10783 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10787 xref_tag_from_type (tree old, tree id, tag_scope scope)
10789 enum tag_types tag_kind;
10791 if (TREE_CODE (old) == RECORD_TYPE)
10792 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10794 tag_kind = union_type;
10796 if (id == NULL_TREE)
10797 id = TYPE_IDENTIFIER (old);
10799 return xref_tag (tag_kind, id, scope, false);
10802 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10803 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10804 access_* node, and the TREE_VALUE is the type of the base-class.
10805 Non-NULL TREE_TYPE indicates virtual inheritance.
10807 Returns true if the binfo hierarchy was successfully created,
10808 false if an error was detected. */
10811 xref_basetypes (tree ref, tree base_list)
10814 tree binfo, base_binfo;
10815 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10816 unsigned max_bases = 0; /* Maximum direct bases. */
10818 tree default_access;
10819 tree igo_prev; /* Track Inheritance Graph Order. */
10821 if (ref == error_mark_node)
10824 /* The base of a derived class is private by default, all others are
10826 default_access = (TREE_CODE (ref) == RECORD_TYPE
10827 && CLASSTYPE_DECLARED_CLASS (ref)
10828 ? access_private_node : access_public_node);
10830 /* First, make sure that any templates in base-classes are
10831 instantiated. This ensures that if we call ourselves recursively
10832 we do not get confused about which classes are marked and which
10834 basep = &base_list;
10837 tree basetype = TREE_VALUE (*basep);
10839 if (!(processing_template_decl && uses_template_parms (basetype))
10840 && !complete_type_or_else (basetype, NULL))
10841 /* An incomplete type. Remove it from the list. */
10842 *basep = TREE_CHAIN (*basep);
10846 if (TREE_TYPE (*basep))
10848 if (CLASS_TYPE_P (basetype))
10849 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10850 basep = &TREE_CHAIN (*basep);
10854 TYPE_MARKED_P (ref) = 1;
10856 /* The binfo slot should be empty, unless this is an (ill-formed)
10858 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10859 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10861 binfo = make_tree_binfo (max_bases);
10863 TYPE_BINFO (ref) = binfo;
10864 BINFO_OFFSET (binfo) = size_zero_node;
10865 BINFO_TYPE (binfo) = ref;
10867 /* Apply base-class info set up to the variants of this type. */
10868 fixup_type_variants (ref);
10872 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10873 /* An aggregate cannot have baseclasses. */
10874 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10876 if (TREE_CODE (ref) == UNION_TYPE)
10878 error ("derived union %qT invalid", ref);
10885 if (TYPE_FOR_JAVA (ref))
10887 error ("Java class %qT cannot have multiple bases", ref);
10894 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10896 if (TYPE_FOR_JAVA (ref))
10898 error ("Java class %qT cannot have virtual bases", ref);
10903 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10905 tree access = TREE_PURPOSE (base_list);
10906 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10907 tree basetype = TREE_VALUE (base_list);
10909 if (access == access_default_node)
10910 access = default_access;
10912 if (PACK_EXPANSION_P (basetype))
10913 basetype = PACK_EXPANSION_PATTERN (basetype);
10914 if (TREE_CODE (basetype) == TYPE_DECL)
10915 basetype = TREE_TYPE (basetype);
10916 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10918 error ("base type %qT fails to be a struct or class type",
10923 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10924 TYPE_FOR_JAVA (ref) = 1;
10926 base_binfo = NULL_TREE;
10927 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10929 base_binfo = TYPE_BINFO (basetype);
10930 /* The original basetype could have been a typedef'd type. */
10931 basetype = BINFO_TYPE (base_binfo);
10933 /* Inherit flags from the base. */
10934 TYPE_HAS_NEW_OPERATOR (ref)
10935 |= TYPE_HAS_NEW_OPERATOR (basetype);
10936 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10937 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10938 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10939 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10940 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10941 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10942 CLASSTYPE_REPEATED_BASE_P (ref)
10943 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10946 /* We must do this test after we've seen through a typedef
10948 if (TYPE_MARKED_P (basetype))
10950 if (basetype == ref)
10951 error ("recursive type %qT undefined", basetype);
10953 error ("duplicate base type %qT invalid", basetype);
10957 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10958 /* Regenerate the pack expansion for the bases. */
10959 basetype = make_pack_expansion (basetype);
10961 TYPE_MARKED_P (basetype) = 1;
10963 base_binfo = copy_binfo (base_binfo, basetype, ref,
10964 &igo_prev, via_virtual);
10965 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10966 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10968 BINFO_BASE_APPEND (binfo, base_binfo);
10969 BINFO_BASE_ACCESS_APPEND (binfo, access);
10972 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10973 /* If we have space in the vbase vector, we must have shared at
10974 least one of them, and are therefore diamond shaped. */
10975 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10977 /* Unmark all the types. */
10978 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10979 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10980 TYPE_MARKED_P (ref) = 0;
10982 /* Now see if we have a repeated base type. */
10983 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10985 for (base_binfo = binfo; base_binfo;
10986 base_binfo = TREE_CHAIN (base_binfo))
10988 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10990 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10993 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10995 for (base_binfo = binfo; base_binfo;
10996 base_binfo = TREE_CHAIN (base_binfo))
10997 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10998 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11007 /* Begin compiling the definition of an enumeration type.
11010 UNDERLYING_TYPE is the type that will be used as the storage for
11011 the enumeration type. This should be NULL_TREE if no storage type
11014 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11016 Returns the type object, as yet incomplete.
11017 Also records info about it so that build_enumerator
11018 may be used to declare the individual values as they are read. */
11021 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11025 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11027 /* If this is the real definition for a previous forward reference,
11028 fill in the contents in the same object that used to be the
11029 forward reference. */
11031 enumtype = lookup_and_check_tag (enum_type, name,
11032 /*tag_scope=*/ts_current,
11033 /*template_header_p=*/false);
11035 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11037 error_at (input_location, "multiple definition of %q#T", enumtype);
11038 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11039 "previous definition here");
11040 /* Clear out TYPE_VALUES, and start again. */
11041 TYPE_VALUES (enumtype) = NULL_TREE;
11045 /* In case of error, make a dummy enum to allow parsing to
11047 if (enumtype == error_mark_node)
11048 name = make_anon_name ();
11050 enumtype = cxx_make_type (ENUMERAL_TYPE);
11051 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11054 if (enumtype == error_mark_node)
11059 SET_SCOPED_ENUM_P (enumtype, 1);
11060 begin_scope (sk_scoped_enum, enumtype);
11062 /* [C++0x dcl.enum]p5:
11064 If not explicitly specified, the underlying type of a scoped
11065 enumeration type is int. */
11066 if (!underlying_type)
11067 underlying_type = integer_type_node;
11070 if (underlying_type)
11072 if (CP_INTEGRAL_TYPE_P (underlying_type))
11074 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11075 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11076 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11077 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11078 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11079 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11080 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11081 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11082 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11083 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11085 else if (!dependent_type_p (underlying_type))
11086 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11087 underlying_type, enumtype);
11093 /* After processing and defining all the values of an enumeration type,
11094 install their decls in the enumeration type and finish it off.
11095 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11098 finish_enum (tree enumtype)
11107 bool use_short_enum;
11112 tree underlying_type = NULL_TREE;
11113 bool fixed_underlying_type_p
11114 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11116 /* We built up the VALUES in reverse order. */
11117 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11119 /* For an enum defined in a template, just set the type of the values;
11120 all further processing is postponed until the template is
11121 instantiated. We need to set the type so that tsubst of a CONST_DECL
11123 if (processing_template_decl)
11125 for (values = TYPE_VALUES (enumtype);
11127 values = TREE_CHAIN (values))
11128 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11129 if (at_function_scope_p ())
11130 add_stmt (build_min (TAG_DEFN, enumtype));
11131 if (SCOPED_ENUM_P (enumtype))
11136 /* Determine the minimum and maximum values of the enumerators. */
11137 if (TYPE_VALUES (enumtype))
11139 minnode = maxnode = NULL_TREE;
11141 for (values = TYPE_VALUES (enumtype);
11143 values = TREE_CHAIN (values))
11145 decl = TREE_VALUE (values);
11147 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11148 each enumerator has the type of its enumeration. Prior to the
11149 closing brace, the type of each enumerator is the type of its
11150 initializing value. */
11151 TREE_TYPE (decl) = enumtype;
11153 /* Update the minimum and maximum values, if appropriate. */
11154 value = DECL_INITIAL (decl);
11155 if (value == error_mark_node)
11156 value = integer_zero_node;
11157 /* Figure out what the minimum and maximum values of the
11158 enumerators are. */
11160 minnode = maxnode = value;
11161 else if (tree_int_cst_lt (maxnode, value))
11163 else if (tree_int_cst_lt (value, minnode))
11170 If the enumerator-list is empty, the underlying type is as if
11171 the enumeration had a single enumerator with value 0. */
11172 minnode = maxnode = integer_zero_node;
11174 /* Compute the number of bits require to represent all values of the
11175 enumeration. We must do this before the type of MINNODE and
11176 MAXNODE are transformed, since tree_int_cst_min_precision relies
11177 on the TREE_TYPE of the value it is passed. */
11178 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11179 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11180 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11181 precision = MAX (lowprec, highprec);
11183 if (!fixed_underlying_type_p)
11185 /* Determine the underlying type of the enumeration.
11189 The underlying type of an enumeration is an integral type that
11190 can represent all the enumerator values defined in the
11191 enumeration. It is implementation-defined which integral type is
11192 used as the underlying type for an enumeration except that the
11193 underlying type shall not be larger than int unless the value of
11194 an enumerator cannot fit in an int or unsigned int.
11196 We use "int" or an "unsigned int" as the underlying type, even if
11197 a smaller integral type would work, unless the user has
11198 explicitly requested that we use the smallest possible type. The
11199 user can request that for all enumerations with a command line
11200 flag, or for just one enumeration with an attribute. */
11202 use_short_enum = flag_short_enums
11203 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11205 for (itk = (use_short_enum ? itk_char : itk_int);
11209 underlying_type = integer_types[itk];
11210 if (TYPE_PRECISION (underlying_type) >= precision
11211 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11214 if (itk == itk_none)
11218 IF no integral type can represent all the enumerator values, the
11219 enumeration is ill-formed. */
11220 error ("no integral type can represent all of the enumerator values "
11221 "for %qT", enumtype);
11222 precision = TYPE_PRECISION (long_long_integer_type_node);
11223 underlying_type = integer_types[itk_unsigned_long_long];
11228 The value of sizeof() applied to an enumeration type, an object
11229 of an enumeration type, or an enumerator, is the value of sizeof()
11230 applied to the underlying type. */
11231 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11232 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11233 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11234 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11235 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11236 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11238 /* Set the underlying type of the enumeration type to the
11239 computed enumeration type, restricted to the enumerator
11241 ENUM_UNDERLYING_TYPE (enumtype)
11242 = build_distinct_type_copy (underlying_type);
11243 set_min_and_max_values_for_integral_type
11244 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11247 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11249 /* Compute the minimum and maximum values for the type.
11253 For an enumeration where emin is the smallest enumerator and emax
11254 is the largest, the values of the enumeration are the values of the
11255 underlying type in the range bmin to bmax, where bmin and bmax are,
11256 respectively, the smallest and largest values of the smallest bit-
11257 field that can store emin and emax. */
11259 /* The middle-end currently assumes that types with TYPE_PRECISION
11260 narrower than their underlying type are suitably zero or sign
11261 extended to fill their mode. g++ doesn't make these guarantees.
11262 Until the middle-end can represent such paradoxical types, we
11263 set the TYPE_PRECISION to the width of the underlying type. */
11264 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11266 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11268 /* Convert each of the enumerators to the type of the underlying
11269 type of the enumeration. */
11270 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11272 location_t saved_location;
11274 decl = TREE_VALUE (values);
11275 saved_location = input_location;
11276 input_location = DECL_SOURCE_LOCATION (decl);
11277 if (fixed_underlying_type_p)
11278 /* If the enumeration type has a fixed underlying type, we
11279 already checked all of the enumerator values. */
11280 value = DECL_INITIAL (decl);
11282 value = perform_implicit_conversion (underlying_type,
11283 DECL_INITIAL (decl),
11284 tf_warning_or_error);
11285 input_location = saved_location;
11287 /* Do not clobber shared ints. */
11288 value = copy_node (value);
11290 TREE_TYPE (value) = enumtype;
11291 DECL_INITIAL (decl) = value;
11294 /* Fix up all variant types of this enum type. */
11295 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11297 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11298 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11299 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11300 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11301 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11302 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11303 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11304 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11305 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11306 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11307 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11310 /* Finish up the scope of a scoped enumeration. */
11311 if (SCOPED_ENUM_P (enumtype))
11314 /* Finish debugging output for this type. */
11315 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11318 /* Build and install a CONST_DECL for an enumeration constant of the
11319 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11320 Assignment of sequential values by default is handled here. */
11323 build_enumerator (tree name, tree value, tree enumtype)
11329 /* If the VALUE was erroneous, pretend it wasn't there; that will
11330 result in the enum being assigned the next value in sequence. */
11331 if (value == error_mark_node)
11334 /* Remove no-op casts from the value. */
11336 STRIP_TYPE_NOPS (value);
11338 if (! processing_template_decl)
11340 /* Validate and default VALUE. */
11341 if (value != NULL_TREE)
11343 value = integral_constant_value (value);
11345 if (TREE_CODE (value) == INTEGER_CST)
11347 value = perform_integral_promotions (value);
11348 constant_expression_warning (value);
11352 error ("enumerator value for %qD is not an integer constant", name);
11357 /* Default based on previous value. */
11358 if (value == NULL_TREE)
11360 if (TYPE_VALUES (enumtype))
11363 unsigned HOST_WIDE_INT lo;
11367 /* The next value is the previous value plus one.
11368 add_double doesn't know the type of the target expression,
11369 so we must check with int_fits_type_p as well. */
11370 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11371 if (error_operand_p (prev_value))
11372 value = error_mark_node;
11375 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11376 TREE_INT_CST_HIGH (prev_value),
11378 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11380 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11384 error ("overflow in enumeration values at %qD", name);
11385 value = error_mark_node;
11390 value = integer_zero_node;
11393 /* Remove no-op casts from the value. */
11394 STRIP_TYPE_NOPS (value);
11396 /* If the underlying type of the enum is fixed, check whether
11397 the enumerator values fits in the underlying type. If it
11398 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11399 if (ENUM_UNDERLYING_TYPE (enumtype)
11401 && TREE_CODE (value) == INTEGER_CST
11402 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11404 error ("enumerator value %E is too large for underlying type %<%T%>",
11405 value, ENUM_UNDERLYING_TYPE (enumtype));
11407 /* Silently convert the value so that we can continue. */
11408 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11413 /* C++ associates enums with global, function, or class declarations. */
11414 context = current_scope ();
11416 /* Build the actual enumeration constant. Note that the enumeration
11417 constants have the underlying type of the enum (if it is fixed)
11418 or the type of their initializer (if the underlying type of the
11419 enum is not fixed):
11423 If the underlying type is fixed, the type of each enumerator
11424 prior to the closing brace is the underlying type; if the
11425 initializing value of an enumerator cannot be represented by
11426 the underlying type, the program is ill-formed. If the
11427 underlying type is not fixed, the type of each enumerator is
11428 the type of its initializing value.
11430 If the underlying type is not fixed, it will be computed by
11431 finish_enum and we will reset the type of this enumerator. Of
11432 course, if we're processing a template, there may be no value. */
11433 type = value ? TREE_TYPE (value) : NULL_TREE;
11435 if (context && context == current_class_type)
11436 /* This enum declaration is local to the class. We need the full
11437 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11438 decl = build_lang_decl (CONST_DECL, name, type);
11440 /* It's a global enum, or it's local to a function. (Note local to
11441 a function could mean local to a class method. */
11442 decl = build_decl (input_location, CONST_DECL, name, type);
11444 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11445 TREE_CONSTANT (decl) = 1;
11446 TREE_READONLY (decl) = 1;
11447 DECL_INITIAL (decl) = value;
11449 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11450 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11451 on the TYPE_FIELDS list for `S'. (That's so that you can say
11452 things like `S::i' later.) */
11453 finish_member_declaration (decl);
11457 /* Add this enumeration constant to the list for this type. */
11458 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11461 /* Look for an enumerator with the given NAME within the enumeration
11462 type ENUMTYPE. This routine is used primarily for qualified name
11463 lookup into an enumerator in C++0x, e.g.,
11465 enum class Color { Red, Green, Blue };
11467 Color color = Color::Red;
11469 Returns the value corresponding to the enumerator, or
11470 NULL_TREE if no such enumerator was found. */
11472 lookup_enumerator (tree enumtype, tree name)
11475 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11477 e = purpose_member (name, TYPE_VALUES (enumtype));
11478 return e? TREE_VALUE (e) : NULL_TREE;
11482 /* We're defining DECL. Make sure that it's type is OK. */
11485 check_function_type (tree decl, tree current_function_parms)
11487 tree fntype = TREE_TYPE (decl);
11488 tree return_type = complete_type (TREE_TYPE (fntype));
11490 /* In a function definition, arg types must be complete. */
11491 require_complete_types_for_parms (current_function_parms);
11493 /* constexpr functions must have literal argument types and
11494 literal return type. */
11495 validate_constexpr_fundecl (decl);
11497 if (dependent_type_p (return_type))
11499 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11500 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11502 tree args = TYPE_ARG_TYPES (fntype);
11504 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11505 error ("return type %q#T is incomplete", return_type);
11507 error ("return type has Java class type %q#T", return_type);
11509 /* Make it return void instead. */
11510 if (TREE_CODE (fntype) == METHOD_TYPE)
11511 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11513 TREE_CHAIN (args));
11515 fntype = build_function_type (void_type_node, args);
11517 = build_exception_variant (fntype,
11518 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11521 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11524 /* Create the FUNCTION_DECL for a function definition.
11525 DECLSPECS and DECLARATOR are the parts of the declaration;
11526 they describe the function's name and the type it returns,
11527 but twisted together in a fashion that parallels the syntax of C.
11529 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11530 DECLARATOR is really the DECL for the function we are about to
11531 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11532 indicating that the function is an inline defined in-class.
11534 This function creates a binding context for the function body
11535 as well as setting up the FUNCTION_DECL in current_function_decl.
11537 For C++, we must first check whether that datum makes any sense.
11538 For example, "class A local_a(1,2);" means that variable local_a
11539 is an aggregate of type A, which should have a constructor
11540 applied to it with the argument list [1, 2].
11542 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11543 or may be a BLOCK if the function has been defined previously
11544 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11545 error_mark_node if the function has never been defined, or
11546 a BLOCK if the function has been defined somewhere. */
11549 start_preparsed_function (tree decl1, tree attrs, int flags)
11551 tree ctype = NULL_TREE;
11554 int doing_friend = 0;
11555 struct cp_binding_level *bl;
11556 tree current_function_parms;
11557 struct c_fileinfo *finfo
11558 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11559 bool honor_interface;
11561 /* Sanity check. */
11562 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11563 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11565 fntype = TREE_TYPE (decl1);
11566 if (TREE_CODE (fntype) == METHOD_TYPE)
11567 ctype = TYPE_METHOD_BASETYPE (fntype);
11569 /* ISO C++ 11.4/5. A friend function defined in a class is in
11570 the (lexical) scope of the class in which it is defined. */
11571 if (!ctype && DECL_FRIEND_P (decl1))
11573 ctype = DECL_FRIEND_CONTEXT (decl1);
11575 /* CTYPE could be null here if we're dealing with a template;
11576 for example, `inline friend float foo()' inside a template
11577 will have no CTYPE set. */
11578 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11584 if (DECL_DECLARED_INLINE_P (decl1)
11585 && lookup_attribute ("noinline", attrs))
11586 warning (0, "inline function %q+D given attribute noinline", decl1);
11588 /* Handle gnu_inline attribute. */
11589 if (GNU_INLINE_P (decl1))
11591 DECL_EXTERNAL (decl1) = 1;
11592 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11593 DECL_INTERFACE_KNOWN (decl1) = 1;
11594 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11597 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11598 /* This is a constructor, we must ensure that any default args
11599 introduced by this definition are propagated to the clones
11600 now. The clones are used directly in overload resolution. */
11601 adjust_clone_args (decl1);
11603 /* Sometimes we don't notice that a function is a static member, and
11604 build a METHOD_TYPE for it. Fix that up now. */
11605 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11606 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11608 revert_static_member_fn (decl1);
11612 /* Set up current_class_type, and enter the scope of the class, if
11615 push_nested_class (ctype);
11616 else if (DECL_STATIC_FUNCTION_P (decl1))
11617 push_nested_class (DECL_CONTEXT (decl1));
11619 /* Now that we have entered the scope of the class, we must restore
11620 the bindings for any template parameters surrounding DECL1, if it
11621 is an inline member template. (Order is important; consider the
11622 case where a template parameter has the same name as a field of
11623 the class.) It is not until after this point that
11624 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11625 if (flags & SF_INCLASS_INLINE)
11626 maybe_begin_member_template_processing (decl1);
11628 /* Effective C++ rule 15. */
11630 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11631 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11632 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11634 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11635 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11636 if (!DECL_INITIAL (decl1))
11637 DECL_INITIAL (decl1) = error_mark_node;
11639 /* This function exists in static storage.
11640 (This does not mean `static' in the C sense!) */
11641 TREE_STATIC (decl1) = 1;
11643 /* We must call push_template_decl after current_class_type is set
11644 up. (If we are processing inline definitions after exiting a
11645 class scope, current_class_type will be NULL_TREE until set above
11646 by push_nested_class.) */
11647 if (processing_template_decl)
11649 /* FIXME: Handle error_mark_node more gracefully. */
11650 tree newdecl1 = push_template_decl (decl1);
11651 if (newdecl1 != error_mark_node)
11655 /* We are now in the scope of the function being defined. */
11656 current_function_decl = decl1;
11658 /* Save the parm names or decls from this function's declarator
11659 where store_parm_decls will find them. */
11660 current_function_parms = DECL_ARGUMENTS (decl1);
11662 /* Make sure the parameter and return types are reasonable. When
11663 you declare a function, these types can be incomplete, but they
11664 must be complete when you define the function. */
11665 check_function_type (decl1, current_function_parms);
11667 /* Build the return declaration for the function. */
11668 restype = TREE_TYPE (fntype);
11669 if (DECL_RESULT (decl1) == NULL_TREE)
11673 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11674 DECL_ARTIFICIAL (resdecl) = 1;
11675 DECL_IGNORED_P (resdecl) = 1;
11676 DECL_RESULT (decl1) = resdecl;
11678 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11681 /* Let the user know we're compiling this function. */
11682 announce_function (decl1);
11684 /* Record the decl so that the function name is defined.
11685 If we already have a decl for this name, and it is a FUNCTION_DECL,
11686 use the old decl. */
11687 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11689 /* A specialization is not used to guide overload resolution. */
11690 if (!DECL_FUNCTION_MEMBER_P (decl1)
11691 && !(DECL_USE_TEMPLATE (decl1) &&
11692 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11694 tree olddecl = pushdecl (decl1);
11696 if (olddecl == error_mark_node)
11697 /* If something went wrong when registering the declaration,
11698 use DECL1; we have to have a FUNCTION_DECL to use when
11699 parsing the body of the function. */
11703 /* Otherwise, OLDDECL is either a previous declaration
11704 of the same function or DECL1 itself. */
11706 if (warn_missing_declarations
11707 && olddecl == decl1
11708 && !DECL_MAIN_P (decl1)
11709 && TREE_PUBLIC (decl1)
11710 && !DECL_DECLARED_INLINE_P (decl1))
11714 /* Check whether DECL1 is in an anonymous
11716 for (context = DECL_CONTEXT (decl1);
11718 context = DECL_CONTEXT (context))
11720 if (TREE_CODE (context) == NAMESPACE_DECL
11721 && DECL_NAME (context) == NULL_TREE)
11725 if (context == NULL)
11726 warning (OPT_Wmissing_declarations,
11727 "no previous declaration for %q+D", decl1);
11735 /* We need to set the DECL_CONTEXT. */
11736 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11737 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11739 fntype = TREE_TYPE (decl1);
11741 /* If #pragma weak applies, mark the decl appropriately now.
11742 The pragma only applies to global functions. Because
11743 determining whether or not the #pragma applies involves
11744 computing the mangled name for the declaration, we cannot
11745 apply the pragma until after we have merged this declaration
11746 with any previous declarations; if the original declaration
11747 has a linkage specification, that specification applies to
11748 the definition as well, and may affect the mangled name. */
11749 if (!DECL_CONTEXT (decl1))
11750 maybe_apply_pragma_weak (decl1);
11753 /* Reset this in case the call to pushdecl changed it. */
11754 current_function_decl = decl1;
11756 gcc_assert (DECL_INITIAL (decl1));
11758 /* This function may already have been parsed, in which case just
11759 return; our caller will skip over the body without parsing. */
11760 if (DECL_INITIAL (decl1) != error_mark_node)
11763 /* Initialize RTL machinery. We cannot do this until
11764 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11765 even when processing a template; this is how we get
11766 CFUN set up, and our per-function variables initialized.
11767 FIXME factor out the non-RTL stuff. */
11768 bl = current_binding_level;
11769 allocate_struct_function (decl1, processing_template_decl);
11771 /* Initialize the language data structures. Whenever we start
11772 a new function, we destroy temporaries in the usual way. */
11773 cfun->language = GGC_CNEW (struct language_function);
11774 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11775 current_binding_level = bl;
11777 /* Even though we're inside a function body, we still don't want to
11778 call expand_expr to calculate the size of a variable-sized array.
11779 We haven't necessarily assigned RTL to all variables yet, so it's
11780 not safe to try to expand expressions involving them. */
11781 cfun->dont_save_pending_sizes_p = 1;
11783 /* Start the statement-tree, start the tree now. */
11784 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11786 /* If we are (erroneously) defining a function that we have already
11787 defined before, wipe out what we knew before. */
11788 if (!DECL_PENDING_INLINE_P (decl1))
11789 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11791 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11793 /* We know that this was set up by `grokclassfn'. We do not
11794 wait until `store_parm_decls', since evil parse errors may
11795 never get us to that point. Here we keep the consistency
11796 between `current_class_type' and `current_class_ptr'. */
11797 tree t = DECL_ARGUMENTS (decl1);
11799 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11800 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11802 cp_function_chain->x_current_class_ref
11803 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11804 cp_function_chain->x_current_class_ptr = t;
11806 /* Constructors and destructors need to know whether they're "in
11807 charge" of initializing virtual base classes. */
11808 t = TREE_CHAIN (t);
11809 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11811 current_in_charge_parm = t;
11812 t = TREE_CHAIN (t);
11814 if (DECL_HAS_VTT_PARM_P (decl1))
11816 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11817 current_vtt_parm = t;
11821 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11822 /* Implicitly-defined methods (like the
11823 destructor for a class in which no destructor
11824 is explicitly declared) must not be defined
11825 until their definition is needed. So, we
11826 ignore interface specifications for
11827 compiler-generated functions. */
11828 && !DECL_ARTIFICIAL (decl1));
11830 if (DECL_INTERFACE_KNOWN (decl1))
11832 tree ctx = decl_function_context (decl1);
11834 if (DECL_NOT_REALLY_EXTERN (decl1))
11835 DECL_EXTERNAL (decl1) = 0;
11837 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11838 && TREE_PUBLIC (ctx))
11839 /* This is a function in a local class in an extern inline
11841 comdat_linkage (decl1);
11843 /* If this function belongs to an interface, it is public.
11844 If it belongs to someone else's interface, it is also external.
11845 This only affects inlines and template instantiations. */
11846 else if (!finfo->interface_unknown && honor_interface)
11848 if (DECL_DECLARED_INLINE_P (decl1)
11849 || DECL_TEMPLATE_INSTANTIATION (decl1)
11850 || processing_template_decl)
11852 DECL_EXTERNAL (decl1)
11853 = (finfo->interface_only
11854 || (DECL_DECLARED_INLINE_P (decl1)
11855 && ! flag_implement_inlines
11856 && !DECL_VINDEX (decl1)));
11858 /* For WIN32 we also want to put these in linkonce sections. */
11859 maybe_make_one_only (decl1);
11862 DECL_EXTERNAL (decl1) = 0;
11863 DECL_INTERFACE_KNOWN (decl1) = 1;
11864 /* If this function is in an interface implemented in this file,
11865 make sure that the back end knows to emit this function
11867 if (!DECL_EXTERNAL (decl1))
11868 mark_needed (decl1);
11870 else if (finfo->interface_unknown && finfo->interface_only
11871 && honor_interface)
11873 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11874 interface, we will have both finfo->interface_unknown and
11875 finfo->interface_only set. In that case, we don't want to
11876 use the normal heuristics because someone will supply a
11877 #pragma implementation elsewhere, and deducing it here would
11878 produce a conflict. */
11879 comdat_linkage (decl1);
11880 DECL_EXTERNAL (decl1) = 0;
11881 DECL_INTERFACE_KNOWN (decl1) = 1;
11882 DECL_DEFER_OUTPUT (decl1) = 1;
11886 /* This is a definition, not a reference.
11887 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11888 if (!GNU_INLINE_P (decl1))
11889 DECL_EXTERNAL (decl1) = 0;
11891 if ((DECL_DECLARED_INLINE_P (decl1)
11892 || DECL_TEMPLATE_INSTANTIATION (decl1))
11893 && ! DECL_INTERFACE_KNOWN (decl1)
11894 /* Don't try to defer nested functions for now. */
11895 && ! decl_function_context (decl1))
11896 DECL_DEFER_OUTPUT (decl1) = 1;
11898 DECL_INTERFACE_KNOWN (decl1) = 1;
11901 /* Determine the ELF visibility attribute for the function. We must not
11902 do this before calling "pushdecl", as we must allow "duplicate_decls"
11903 to merge any attributes appropriately. We also need to wait until
11905 if (!DECL_CLONED_FUNCTION_P (decl1))
11906 determine_visibility (decl1);
11908 begin_scope (sk_function_parms, decl1);
11912 if (DECL_DESTRUCTOR_P (decl1)
11913 || (DECL_CONSTRUCTOR_P (decl1)
11914 && targetm.cxx.cdtor_returns_this ()))
11916 cdtor_label = build_decl (input_location,
11917 LABEL_DECL, NULL_TREE, NULL_TREE);
11918 DECL_CONTEXT (cdtor_label) = current_function_decl;
11921 start_fname_decls ();
11923 store_parm_decls (current_function_parms);
11927 /* Like start_preparsed_function, except that instead of a
11928 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11930 Returns 1 on success. If the DECLARATOR is not suitable for a function
11931 (it defines a datum instead), we return 0, which tells
11932 yyparse to report a parse error. */
11935 start_function (cp_decl_specifier_seq *declspecs,
11936 const cp_declarator *declarator,
11941 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11942 if (decl1 == error_mark_node)
11944 /* If the declarator is not suitable for a function definition,
11945 cause a syntax error. */
11946 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11948 error ("invalid function declaration");
11952 if (DECL_MAIN_P (decl1))
11953 /* main must return int. grokfndecl should have corrected it
11954 (and issued a diagnostic) if the user got it wrong. */
11955 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11956 integer_type_node));
11958 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11963 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11967 use_eh_spec_block (tree fn)
11969 return (flag_exceptions && flag_enforce_eh_specs
11970 && !processing_template_decl
11971 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11972 /* We insert the EH_SPEC_BLOCK only in the original
11973 function; then, it is copied automatically to the
11975 && !DECL_CLONED_FUNCTION_P (fn)
11976 /* Implicitly-generated constructors and destructors have
11977 exception specifications. However, those specifications
11978 are the union of the possible exceptions specified by the
11979 constructors/destructors for bases and members, so no
11980 unallowed exception will ever reach this function. By
11981 not creating the EH_SPEC_BLOCK we save a little memory,
11982 and we avoid spurious warnings about unreachable
11984 && !DECL_ARTIFICIAL (fn));
11987 /* Store the parameter declarations into the current function declaration.
11988 This is called after parsing the parameter declarations, before
11989 digesting the body of the function.
11991 Also install to binding contour return value identifier, if any. */
11994 store_parm_decls (tree current_function_parms)
11996 tree fndecl = current_function_decl;
11999 /* This is a chain of any other decls that came in among the parm
12000 declarations. If a parm is declared with enum {foo, bar} x;
12001 then CONST_DECLs for foo and bar are put here. */
12002 tree nonparms = NULL_TREE;
12004 if (current_function_parms)
12006 /* This case is when the function was defined with an ANSI prototype.
12007 The parms already have decls, so we need not do anything here
12008 except record them as in effect
12009 and complain if any redundant old-style parm decls were written. */
12011 tree specparms = current_function_parms;
12014 /* Must clear this because it might contain TYPE_DECLs declared
12016 current_binding_level->names = NULL;
12018 /* If we're doing semantic analysis, then we'll call pushdecl
12019 for each of these. We must do them in reverse order so that
12020 they end in the correct forward order. */
12021 specparms = nreverse (specparms);
12023 for (parm = specparms; parm; parm = next)
12025 next = TREE_CHAIN (parm);
12026 if (TREE_CODE (parm) == PARM_DECL)
12028 if (DECL_NAME (parm) == NULL_TREE
12029 || TREE_CODE (parm) != VOID_TYPE)
12032 error ("parameter %qD declared void", parm);
12036 /* If we find an enum constant or a type tag,
12037 put it aside for the moment. */
12038 TREE_CHAIN (parm) = NULL_TREE;
12039 nonparms = chainon (nonparms, parm);
12043 /* Get the decls in their original chain order and record in the
12044 function. This is all and only the PARM_DECLs that were
12045 pushed into scope by the loop above. */
12046 DECL_ARGUMENTS (fndecl) = getdecls ();
12049 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12051 /* Now store the final chain of decls for the arguments
12052 as the decl-chain of the current lexical scope.
12053 Put the enumerators in as well, at the front so that
12054 DECL_ARGUMENTS is not modified. */
12055 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12057 if (use_eh_spec_block (current_function_decl))
12058 current_eh_spec_block = begin_eh_spec_block ();
12062 /* We have finished doing semantic analysis on DECL, but have not yet
12063 generated RTL for its body. Save away our current state, so that
12064 when we want to generate RTL later we know what to do. */
12067 save_function_data (tree decl)
12069 struct language_function *f;
12071 /* Save the language-specific per-function data so that we can
12072 get it back when we really expand this function. */
12073 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12076 f = GGC_NEW (struct language_function);
12077 memcpy (f, cp_function_chain, sizeof (struct language_function));
12078 DECL_SAVED_FUNCTION_DATA (decl) = f;
12080 /* Clear out the bits we don't need. */
12081 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12082 f->bindings = NULL;
12083 f->x_local_names = NULL;
12087 /* Set the return value of the constructor (if present). */
12090 finish_constructor_body (void)
12095 if (targetm.cxx.cdtor_returns_this ()
12096 && (! TYPE_FOR_JAVA (current_class_type)))
12098 /* Any return from a constructor will end up here. */
12099 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12101 val = DECL_ARGUMENTS (current_function_decl);
12102 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12103 DECL_RESULT (current_function_decl), val);
12104 /* Return the address of the object. */
12105 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12106 add_stmt (exprstmt);
12110 /* Do all the processing for the beginning of a destructor; set up the
12111 vtable pointers and cleanups for bases and members. */
12114 begin_destructor_body (void)
12116 tree compound_stmt;
12118 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12119 issued an error message. We still want to try to process the
12120 body of the function, but initialize_vtbl_ptrs will crash if
12121 TYPE_BINFO is NULL. */
12122 if (COMPLETE_TYPE_P (current_class_type))
12124 compound_stmt = begin_compound_stmt (0);
12125 /* Make all virtual function table pointers in non-virtual base
12126 classes point to CURRENT_CLASS_TYPE's virtual function
12128 initialize_vtbl_ptrs (current_class_ptr);
12129 finish_compound_stmt (compound_stmt);
12131 /* And insert cleanups for our bases and members so that they
12132 will be properly destroyed if we throw. */
12133 push_base_cleanups ();
12137 /* At the end of every destructor we generate code to delete the object if
12138 necessary. Do that now. */
12141 finish_destructor_body (void)
12145 /* Any return from a destructor will end up here; that way all base
12146 and member cleanups will be run when the function returns. */
12147 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12149 /* In a virtual destructor, we must call delete. */
12150 if (DECL_VIRTUAL_P (current_function_decl))
12153 tree virtual_size = cxx_sizeof (current_class_type);
12157 At the point of definition of a virtual destructor (including
12158 an implicit definition), non-placement operator delete shall
12159 be looked up in the scope of the destructor's class and if
12160 found shall be accessible and unambiguous. */
12161 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12163 /*global_p=*/false,
12164 /*placement=*/NULL_TREE,
12165 /*alloc_fn=*/NULL_TREE);
12167 if_stmt = begin_if_stmt ();
12168 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12169 current_in_charge_parm,
12172 finish_expr_stmt (exprstmt);
12173 finish_then_clause (if_stmt);
12174 finish_if_stmt (if_stmt);
12177 if (targetm.cxx.cdtor_returns_this ())
12181 val = DECL_ARGUMENTS (current_function_decl);
12182 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12183 DECL_RESULT (current_function_decl), val);
12184 /* Return the address of the object. */
12185 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12186 add_stmt (exprstmt);
12190 /* Do the necessary processing for the beginning of a function body, which
12191 in this case includes member-initializers, but not the catch clauses of
12192 a function-try-block. Currently, this means opening a binding level
12193 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12196 begin_function_body (void)
12200 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12203 if (processing_template_decl)
12204 /* Do nothing now. */;
12206 /* Always keep the BLOCK node associated with the outermost pair of
12207 curly braces of a function. These are needed for correct
12208 operation of dwarfout.c. */
12209 keep_next_level (true);
12211 stmt = begin_compound_stmt (BCS_FN_BODY);
12213 if (processing_template_decl)
12214 /* Do nothing now. */;
12215 else if (DECL_DESTRUCTOR_P (current_function_decl))
12216 begin_destructor_body ();
12221 /* Do the processing for the end of a function body. Currently, this means
12222 closing out the cleanups for fully-constructed bases and members, and in
12223 the case of the destructor, deleting the object if desired. Again, this
12224 is only meaningful for [cd]tors, since they are the only functions where
12225 there is a significant distinction between the main body and any
12226 function catch clauses. Handling, say, main() return semantics here
12227 would be wrong, as flowing off the end of a function catch clause for
12228 main() would also need to return 0. */
12231 finish_function_body (tree compstmt)
12233 if (compstmt == NULL_TREE)
12236 /* Close the block. */
12237 finish_compound_stmt (compstmt);
12239 if (processing_template_decl)
12240 /* Do nothing now. */;
12241 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12242 finish_constructor_body ();
12243 else if (DECL_DESTRUCTOR_P (current_function_decl))
12244 finish_destructor_body ();
12247 /* Given a function, returns the BLOCK corresponding to the outermost level
12248 of curly braces, skipping the artificial block created for constructor
12252 outer_curly_brace_block (tree fndecl)
12254 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12255 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12256 /* Skip the artificial function body block. */
12257 block = BLOCK_SUBBLOCKS (block);
12261 /* Finish up a function declaration and compile that function
12262 all the way to assembler language output. The free the storage
12263 for the function definition.
12265 FLAGS is a bitwise or of the following values:
12267 We just finished processing the body of an in-class inline
12268 function definition. (This processing will have taken place
12269 after the class definition is complete.) */
12272 finish_function (int flags)
12274 tree fndecl = current_function_decl;
12275 tree fntype, ctype = NULL_TREE;
12276 int inclass_inline = (flags & 2) != 0;
12279 /* When we get some parse errors, we can end up without a
12280 current_function_decl, so cope. */
12281 if (fndecl == NULL_TREE)
12282 return error_mark_node;
12284 gcc_assert (!defer_mark_used_calls);
12285 defer_mark_used_calls = true;
12287 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12288 && DECL_VIRTUAL_P (fndecl)
12289 && !processing_template_decl)
12291 tree fnclass = DECL_CONTEXT (fndecl);
12292 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12293 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12296 nested = function_depth > 1;
12297 fntype = TREE_TYPE (fndecl);
12299 /* TREE_READONLY (fndecl) = 1;
12300 This caused &foo to be of type ptr-to-const-function
12301 which then got a warning when stored in a ptr-to-function variable. */
12303 gcc_assert (building_stmt_tree ());
12304 /* The current function is being defined, so its DECL_INITIAL should
12305 be set, and unless there's a multiple definition, it should be
12306 error_mark_node. */
12307 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12309 /* For a cloned function, we've already got all the code we need;
12310 there's no need to add any extra bits. */
12311 if (!DECL_CLONED_FUNCTION_P (fndecl))
12313 if (DECL_MAIN_P (current_function_decl))
12317 /* Make it so that `main' always returns 0 by default (or
12320 stmt = finish_return_stmt (integer_one_node);
12322 stmt = finish_return_stmt (integer_zero_node);
12324 /* Hack. We don't want the middle-end to warn that this
12325 return is unreachable, so put the statement on the
12328 location_t linezero = linemap_line_start (line_table, 0, 1);
12329 SET_EXPR_LOCATION (stmt, linezero);
12333 if (use_eh_spec_block (current_function_decl))
12334 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12335 (TREE_TYPE (current_function_decl)),
12336 current_eh_spec_block);
12339 /* If we're saving up tree structure, tie off the function now. */
12340 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12342 finish_fname_decls ();
12344 /* If this function can't throw any exceptions, remember that. */
12345 if (!processing_template_decl
12346 && !cp_function_chain->can_throw
12347 && !flag_non_call_exceptions
12348 && !DECL_REPLACEABLE_P (fndecl))
12349 TREE_NOTHROW (fndecl) = 1;
12351 /* This must come after expand_function_end because cleanups might
12352 have declarations (from inline functions) that need to go into
12353 this function's blocks. */
12355 /* If the current binding level isn't the outermost binding level
12356 for this function, either there is a bug, or we have experienced
12357 syntax errors and the statement tree is malformed. */
12358 if (current_binding_level->kind != sk_function_parms)
12360 /* Make sure we have already experienced errors. */
12361 gcc_assert (errorcount);
12363 /* Throw away the broken statement tree and extra binding
12365 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12367 while (current_binding_level->kind != sk_function_parms)
12369 if (current_binding_level->kind == sk_class)
12370 pop_nested_class ();
12372 poplevel (0, 0, 0);
12375 poplevel (1, 0, 1);
12377 /* Statements should always be full-expressions at the outermost set
12378 of curly braces for a function. */
12379 gcc_assert (stmts_are_full_exprs_p ());
12381 /* Set up the named return value optimization, if we can. Candidate
12382 variables are selected in check_return_expr. */
12383 if (current_function_return_value)
12385 tree r = current_function_return_value;
12388 if (r != error_mark_node
12389 /* This is only worth doing for fns that return in memory--and
12390 simpler, since we don't have to worry about promoted modes. */
12391 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12392 /* Only allow this for variables declared in the outer scope of
12393 the function so we know that their lifetime always ends with a
12394 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12395 we were to do this optimization in tree-ssa. */
12396 && (outer = outer_curly_brace_block (fndecl))
12397 && chain_member (r, BLOCK_VARS (outer)))
12398 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12400 current_function_return_value = NULL_TREE;
12403 /* Remember that we were in class scope. */
12404 if (current_class_name)
12405 ctype = current_class_type;
12407 /* Must mark the RESULT_DECL as being in this function. */
12408 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12410 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12411 to the FUNCTION_DECL node itself. */
12412 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12414 /* Save away current state, if appropriate. */
12415 if (!processing_template_decl)
12416 save_function_data (fndecl);
12418 /* Complain if there's just no return statement. */
12419 if (warn_return_type
12420 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12421 && !dependent_type_p (TREE_TYPE (fntype))
12422 && !current_function_returns_value && !current_function_returns_null
12423 /* Don't complain if we abort or throw. */
12424 && !current_function_returns_abnormally
12425 && !DECL_NAME (DECL_RESULT (fndecl))
12426 && !TREE_NO_WARNING (fndecl)
12427 /* Structor return values (if any) are set by the compiler. */
12428 && !DECL_CONSTRUCTOR_P (fndecl)
12429 && !DECL_DESTRUCTOR_P (fndecl))
12431 warning (OPT_Wreturn_type,
12432 "no return statement in function returning non-void");
12433 TREE_NO_WARNING (fndecl) = 1;
12436 /* Store the end of the function, so that we get good line number
12437 info for the epilogue. */
12438 cfun->function_end_locus = input_location;
12440 /* Genericize before inlining. */
12441 if (!processing_template_decl)
12443 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12444 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12445 cp_genericize (fndecl);
12446 /* Clear out the bits we don't need. */
12447 f->x_current_class_ptr = NULL;
12448 f->x_current_class_ref = NULL;
12449 f->x_eh_spec_block = NULL;
12450 f->x_in_charge_parm = NULL;
12451 f->x_vtt_parm = NULL;
12452 f->x_return_value = NULL;
12453 f->bindings = NULL;
12454 f->extern_decl_map = NULL;
12456 /* Clear out the bits we don't need. */
12457 local_names = NULL;
12459 /* We're leaving the context of this function, so zap cfun. It's still in
12460 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12462 current_function_decl = NULL;
12464 /* If this is an in-class inline definition, we may have to pop the
12465 bindings for the template parameters that we added in
12466 maybe_begin_member_template_processing when start_function was
12468 if (inclass_inline)
12469 maybe_end_member_template_processing ();
12471 /* Leave the scope of the class. */
12473 pop_nested_class ();
12479 /* Let the error reporting routines know that we're outside a
12480 function. For a nested function, this value is used in
12481 cxx_pop_function_context and then reset via pop_function_context. */
12482 current_function_decl = NULL_TREE;
12484 defer_mark_used_calls = false;
12485 if (deferred_mark_used_calls)
12490 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12492 VEC_free (tree, gc, deferred_mark_used_calls);
12498 /* Create the FUNCTION_DECL for a function definition.
12499 DECLSPECS and DECLARATOR are the parts of the declaration;
12500 they describe the return type and the name of the function,
12501 but twisted together in a fashion that parallels the syntax of C.
12503 This function creates a binding context for the function body
12504 as well as setting up the FUNCTION_DECL in current_function_decl.
12506 Returns a FUNCTION_DECL on success.
12508 If the DECLARATOR is not suitable for a function (it defines a datum
12509 instead), we return 0, which tells yyparse to report a parse error.
12511 May return void_type_node indicating that this method is actually
12512 a friend. See grokfield for more details.
12514 Came here with a `.pushlevel' .
12516 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12517 CHANGES TO CODE IN `grokfield'. */
12520 grokmethod (cp_decl_specifier_seq *declspecs,
12521 const cp_declarator *declarator, tree attrlist)
12523 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12526 if (fndecl == error_mark_node)
12527 return error_mark_node;
12529 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12531 error ("invalid member function declaration");
12532 return error_mark_node;
12536 cplus_decl_attributes (&fndecl, attrlist, 0);
12538 /* Pass friends other than inline friend functions back. */
12539 if (fndecl == void_type_node)
12542 if (DECL_IN_AGGR_P (fndecl))
12544 if (DECL_CONTEXT (fndecl)
12545 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12546 error ("%qD is already defined in class %qT", fndecl,
12547 DECL_CONTEXT (fndecl));
12548 return error_mark_node;
12551 check_template_shadow (fndecl);
12553 DECL_DECLARED_INLINE_P (fndecl) = 1;
12554 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12556 /* We process method specializations in finish_struct_1. */
12557 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12559 fndecl = push_template_decl (fndecl);
12560 if (fndecl == error_mark_node)
12564 if (! DECL_FRIEND_P (fndecl))
12566 if (TREE_CHAIN (fndecl))
12568 fndecl = copy_node (fndecl);
12569 TREE_CHAIN (fndecl) = NULL_TREE;
12573 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12575 DECL_IN_AGGR_P (fndecl) = 1;
12580 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12581 we can lay it out later, when and if its type becomes complete. */
12584 maybe_register_incomplete_var (tree var)
12586 gcc_assert (TREE_CODE (var) == VAR_DECL);
12588 /* Keep track of variables with incomplete types. */
12589 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12590 && DECL_EXTERNAL (var))
12592 tree inner_type = TREE_TYPE (var);
12594 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12595 inner_type = TREE_TYPE (inner_type);
12596 inner_type = TYPE_MAIN_VARIANT (inner_type);
12598 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12599 /* RTTI TD entries are created while defining the type_info. */
12600 || (TYPE_LANG_SPECIFIC (inner_type)
12601 && TYPE_BEING_DEFINED (inner_type)))
12602 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12606 /* Called when a class type (given by TYPE) is defined. If there are
12607 any existing VAR_DECLs whose type has been completed by this
12608 declaration, update them now. */
12611 complete_vars (tree type)
12613 tree *list = &incomplete_vars;
12615 gcc_assert (CLASS_TYPE_P (type));
12618 if (same_type_p (type, TREE_PURPOSE (*list)))
12620 tree var = TREE_VALUE (*list);
12621 tree type = TREE_TYPE (var);
12622 /* Complete the type of the variable. The VAR_DECL itself
12623 will be laid out in expand_expr. */
12624 complete_type (type);
12625 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12626 /* Remove this entry from the list. */
12627 *list = TREE_CHAIN (*list);
12630 list = &TREE_CHAIN (*list);
12633 /* Check for pending declarations which may have abstract type. */
12634 complete_type_check_abstract (type);
12637 /* If DECL is of a type which needs a cleanup, build and return an
12638 expression to perform that cleanup here. Return NULL_TREE if no
12639 cleanup need be done. */
12642 cxx_maybe_build_cleanup (tree decl)
12648 /* Assume no cleanup is required. */
12649 cleanup = NULL_TREE;
12651 if (error_operand_p (decl))
12654 /* Handle "__attribute__((cleanup))". We run the cleanup function
12655 before the destructor since the destructor is what actually
12656 terminates the lifetime of the object. */
12657 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12664 /* Get the name specified by the user for the cleanup function. */
12665 id = TREE_VALUE (TREE_VALUE (attr));
12666 /* Look up the name to find the cleanup function to call. It is
12667 important to use lookup_name here because that is what is
12668 used in c-common.c:handle_cleanup_attribute when performing
12669 initial checks on the attribute. Note that those checks
12670 include ensuring that the function found is not an overloaded
12671 function, or an object with an overloaded call operator,
12672 etc.; we can rely on the fact that the function found is an
12673 ordinary FUNCTION_DECL. */
12674 fn = lookup_name (id);
12675 arg = build_address (decl);
12677 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12679 tf_warning_or_error);
12681 /* Handle ordinary C++ destructors. */
12682 type = TREE_TYPE (decl);
12683 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12685 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12686 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12687 && CLASSTYPE_VBASECLASSES (type));
12691 if (TREE_CODE (type) == ARRAY_TYPE)
12694 addr = build_address (decl);
12696 /* Optimize for space over speed here. */
12697 if (!has_vbases || flag_expensive_optimizations)
12698 flags |= LOOKUP_NONVIRTUAL;
12700 call = build_delete (TREE_TYPE (addr), addr,
12701 sfk_complete_destructor, flags, 0);
12703 cleanup = build_compound_expr (input_location, cleanup, call);
12711 /* When a stmt has been parsed, this function is called. */
12718 /* DECL was originally constructed as a non-static member function,
12719 but turned out to be static. Update it accordingly. */
12722 revert_static_member_fn (tree decl)
12725 tree function = TREE_TYPE (decl);
12726 tree args = TYPE_ARG_TYPES (function);
12728 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12729 != TYPE_UNQUALIFIED)
12730 error ("static member function %q#D declared with type qualifiers", decl);
12732 args = TREE_CHAIN (args);
12733 tmp = build_function_type (TREE_TYPE (function), args);
12734 tmp = build_qualified_type (tmp, cp_type_quals (function));
12735 tmp = build_exception_variant (tmp,
12736 TYPE_RAISES_EXCEPTIONS (function));
12737 TREE_TYPE (decl) = tmp;
12738 if (DECL_ARGUMENTS (decl))
12739 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12740 DECL_STATIC_FUNCTION_P (decl) = 1;
12743 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12744 one of the language-independent trees. */
12746 enum cp_tree_node_structure_enum
12747 cp_tree_node_structure (union lang_tree_node * t)
12749 switch (TREE_CODE (&t->generic))
12751 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12752 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12753 case OVERLOAD: return TS_CP_OVERLOAD;
12754 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12755 case PTRMEM_CST: return TS_CP_PTRMEM;
12756 case BASELINK: return TS_CP_BASELINK;
12757 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12758 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12759 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12760 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12761 default: return TS_CP_GENERIC;
12765 /* Build the void_list_node (void_type_node having been created). */
12767 build_void_list_node (void)
12769 tree t = build_tree_list (NULL_TREE, void_type_node);
12774 cp_missing_noreturn_ok_p (tree decl)
12776 /* A missing noreturn is ok for the `main' function. */
12777 return DECL_MAIN_P (decl);
12780 /* Return the COMDAT group into which DECL should be placed. */
12783 cxx_comdat_group (tree decl)
12787 /* Virtual tables, construction virtual tables, and virtual table
12788 tables all go in a single COMDAT group, named after the primary
12790 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12791 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12792 /* For all other DECLs, the COMDAT group is the mangled name of the
12793 declaration itself. */
12796 while (DECL_THUNK_P (decl))
12798 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12799 into the same section as the target function. In that case
12800 we must return target's name. */
12801 tree target = THUNK_TARGET (decl);
12802 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12803 && DECL_SECTION_NAME (target) != NULL
12804 && DECL_ONE_ONLY (target))
12809 name = DECL_ASSEMBLER_NAME (decl);
12815 #include "gt-cp-decl.h"