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)->decl_flags.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
920 && ! (DECL_EXTERN_C_P (newdecl)
921 && DECL_EXTERN_C_P (olddecl)))
924 if (TREE_CODE (f1) != TREE_CODE (f2))
927 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
929 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
930 && (DECL_BUILT_IN (olddecl)
931 #ifndef NO_IMPLICIT_EXTERN_C
932 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
933 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
937 types_match = self_promoting_args_p (p1);
938 if (p1 == void_list_node)
939 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
941 #ifndef NO_IMPLICIT_EXTERN_C
942 else if (p1 == NULL_TREE
943 && (DECL_EXTERN_C_P (olddecl)
944 && DECL_IN_SYSTEM_HEADER (olddecl)
945 && !DECL_CLASS_SCOPE_P (olddecl))
946 && (DECL_EXTERN_C_P (newdecl)
947 && DECL_IN_SYSTEM_HEADER (newdecl)
948 && !DECL_CLASS_SCOPE_P (newdecl)))
950 types_match = self_promoting_args_p (p2);
951 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 types_match = compparms (p1, p2);
960 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
962 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
963 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
966 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
967 DECL_TEMPLATE_PARMS (olddecl)))
970 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
971 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
972 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
974 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
975 DECL_TEMPLATE_RESULT (newdecl));
979 /* Need to check scope for variable declaration (VAR_DECL).
980 For typedef (TYPE_DECL), scope is ignored. */
981 if (TREE_CODE (newdecl) == VAR_DECL
982 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
984 Two declarations for an object with C language linkage
985 with the same name (ignoring the namespace that qualify
986 it) that appear in different namespace scopes refer to
988 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
991 if (TREE_TYPE (newdecl) == error_mark_node)
992 types_match = TREE_TYPE (olddecl) == error_mark_node;
993 else if (TREE_TYPE (olddecl) == NULL_TREE)
994 types_match = TREE_TYPE (newdecl) == NULL_TREE;
995 else if (TREE_TYPE (newdecl) == NULL_TREE)
998 types_match = comptypes (TREE_TYPE (newdecl),
1000 COMPARE_REDECLARATION);
1006 /* If NEWDECL is `static' and an `extern' was seen previously,
1007 warn about it. OLDDECL is the previous declaration.
1009 Note that this does not apply to the C++ case of declaring
1010 a variable `extern const' and then later `const'.
1012 Don't complain about built-in functions, since they are beyond
1013 the user's control. */
1016 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1020 if (TREE_CODE (newdecl) == TYPE_DECL
1021 || TREE_CODE (newdecl) == TEMPLATE_DECL
1022 || TREE_CODE (newdecl) == CONST_DECL
1023 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1026 /* Don't get confused by static member functions; that's a different
1028 if (TREE_CODE (newdecl) == FUNCTION_DECL
1029 && DECL_STATIC_FUNCTION_P (newdecl))
1032 /* If the old declaration was `static', or the new one isn't, then
1033 then everything is OK. */
1034 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1037 /* It's OK to declare a builtin function as `static'. */
1038 if (TREE_CODE (olddecl) == FUNCTION_DECL
1039 && DECL_ARTIFICIAL (olddecl))
1042 name = DECL_ASSEMBLER_NAME (newdecl);
1043 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1044 permerror (input_location, "previous declaration of %q+D", olddecl);
1047 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1048 function templates. If their exception specifications do not
1049 match, issue a diagnostic. */
1052 check_redeclaration_exception_specification (tree new_decl,
1057 tree new_exceptions;
1058 tree old_exceptions;
1060 new_type = TREE_TYPE (new_decl);
1061 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1062 old_type = TREE_TYPE (old_decl);
1063 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1067 If any declaration of a function has an exception-specification,
1068 all declarations, including the definition and an explicit
1069 specialization, of that function shall have an
1070 exception-specification with the same set of type-ids. */
1071 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1072 && ! DECL_IS_BUILTIN (old_decl)
1074 && !comp_except_specs (new_exceptions, old_exceptions,
1077 error ("declaration of %qF throws different exceptions", new_decl);
1078 error ("from previous declaration %q+F", old_decl);
1082 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1083 && lookup_attribute ("gnu_inline", \
1084 DECL_ATTRIBUTES (fn)))
1086 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1087 If the redeclaration is invalid, a diagnostic is issued, and the
1088 error_mark_node is returned. Otherwise, OLDDECL is returned.
1090 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1093 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1096 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1098 unsigned olddecl_uid = DECL_UID (olddecl);
1099 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1100 int new_defines_function = 0;
1103 if (newdecl == olddecl)
1106 types_match = decls_match (newdecl, olddecl);
1108 /* If either the type of the new decl or the type of the old decl is an
1109 error_mark_node, then that implies that we have already issued an
1110 error (earlier) for some bogus type specification, and in that case,
1111 it is rather pointless to harass the user with yet more error message
1112 about the same declaration, so just pretend the types match here. */
1113 if (TREE_TYPE (newdecl) == error_mark_node
1114 || TREE_TYPE (olddecl) == error_mark_node)
1115 return error_mark_node;
1117 if (DECL_P (olddecl)
1118 && TREE_CODE (newdecl) == FUNCTION_DECL
1119 && TREE_CODE (olddecl) == FUNCTION_DECL
1120 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1122 if (DECL_DECLARED_INLINE_P (newdecl)
1123 && DECL_UNINLINABLE (newdecl)
1124 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1125 /* Already warned elsewhere. */;
1126 else if (DECL_DECLARED_INLINE_P (olddecl)
1127 && DECL_UNINLINABLE (olddecl)
1128 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1129 /* Already warned. */;
1130 else if (DECL_DECLARED_INLINE_P (newdecl)
1131 && DECL_UNINLINABLE (olddecl)
1132 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1134 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1136 warning (OPT_Wattributes, "previous declaration of %q+D "
1137 "with attribute noinline", olddecl);
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (newdecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1143 warning (OPT_Wattributes, "function %q+D redeclared with "
1144 "attribute noinline", newdecl);
1145 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1150 /* Check for redeclaration and other discrepancies. */
1151 if (TREE_CODE (olddecl) == FUNCTION_DECL
1152 && DECL_ARTIFICIAL (olddecl))
1154 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1155 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1157 /* Avoid warnings redeclaring built-ins which have not been
1158 explicitly declared. */
1159 if (DECL_ANTICIPATED (olddecl))
1162 /* If you declare a built-in or predefined function name as static,
1163 the old definition is overridden, but optionally warn this was a
1164 bad choice of name. */
1165 if (! TREE_PUBLIC (newdecl))
1167 warning (OPT_Wshadow, "shadowing %s function %q#D",
1168 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1170 /* Discard the old built-in function. */
1173 /* If the built-in is not ansi, then programs can override
1174 it even globally without an error. */
1175 else if (! DECL_BUILT_IN (olddecl))
1176 warning (0, "library function %q#D redeclared as non-function %q#D",
1180 error ("declaration of %q#D", newdecl);
1181 error ("conflicts with built-in declaration %q#D",
1186 else if (!types_match)
1188 /* Avoid warnings redeclaring built-ins which have not been
1189 explicitly declared. */
1190 if (DECL_ANTICIPATED (olddecl))
1192 /* Deal with fileptr_type_node. FILE type is not known
1193 at the time we create the builtins. */
1196 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1197 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1199 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1202 else if (TREE_VALUE (t2) == fileptr_type_node)
1204 tree t = TREE_VALUE (t1);
1206 if (TREE_CODE (t) == POINTER_TYPE
1207 && TYPE_NAME (TREE_TYPE (t))
1208 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1209 == get_identifier ("FILE")
1210 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1212 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1215 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1216 types_match = decls_match (newdecl, olddecl);
1218 return duplicate_decls (newdecl, olddecl,
1220 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1223 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1226 else if ((DECL_EXTERN_C_P (newdecl)
1227 && DECL_EXTERN_C_P (olddecl))
1228 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1231 /* A near match; override the builtin. */
1233 if (TREE_PUBLIC (newdecl))
1235 warning (0, "new declaration %q#D", newdecl);
1236 warning (0, "ambiguates built-in declaration %q#D",
1240 warning (OPT_Wshadow, "shadowing %s function %q#D",
1241 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1245 /* Discard the old built-in function. */
1248 /* Replace the old RTL to avoid problems with inlining. */
1249 COPY_DECL_RTL (newdecl, olddecl);
1251 /* Even if the types match, prefer the new declarations type for
1252 built-ins which have not been explicitly declared, for
1253 exception lists, etc... */
1254 else if (DECL_ANTICIPATED (olddecl))
1256 tree type = TREE_TYPE (newdecl);
1257 tree attribs = (*targetm.merge_type_attributes)
1258 (TREE_TYPE (olddecl), type);
1260 type = cp_build_type_attribute_variant (type, attribs);
1261 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1264 /* If a function is explicitly declared "throw ()", propagate that to
1265 the corresponding builtin. */
1266 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1267 && DECL_ANTICIPATED (olddecl)
1268 && TREE_NOTHROW (newdecl)
1269 && !TREE_NOTHROW (olddecl)
1270 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1271 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1273 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1275 /* Whether or not the builtin can throw exceptions has no
1276 bearing on this declarator. */
1277 TREE_NOTHROW (olddecl) = 0;
1279 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1281 /* If a builtin function is redeclared as `static', merge
1282 the declarations, but make the original one static. */
1283 DECL_THIS_STATIC (olddecl) = 1;
1284 TREE_PUBLIC (olddecl) = 0;
1286 /* Make the old declaration consistent with the new one so
1287 that all remnants of the builtin-ness of this function
1288 will be banished. */
1289 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1290 COPY_DECL_RTL (newdecl, olddecl);
1293 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1295 /* C++ Standard, 3.3, clause 4:
1296 "[Note: a namespace name or a class template name must be unique
1297 in its declarative region (7.3.2, clause 14). ]" */
1298 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1299 && TREE_CODE (newdecl) != NAMESPACE_DECL
1300 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1301 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1302 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1303 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1305 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1306 && TREE_CODE (newdecl) != TYPE_DECL)
1307 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1308 && TREE_CODE (olddecl) != TYPE_DECL))
1310 /* We do nothing special here, because C++ does such nasty
1311 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1312 get shadowed, and know that if we need to find a TYPE_DECL
1313 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1314 slot of the identifier. */
1318 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1319 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1320 || (TREE_CODE (olddecl) == FUNCTION_DECL
1321 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1325 error ("%q#D redeclared as different kind of symbol", newdecl);
1326 if (TREE_CODE (olddecl) == TREE_LIST)
1327 olddecl = TREE_VALUE (olddecl);
1328 error ("previous declaration of %q+#D", olddecl);
1330 return error_mark_node;
1332 else if (!types_match)
1334 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1335 /* These are certainly not duplicate declarations; they're
1336 from different scopes. */
1339 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1341 /* The name of a class template may not be declared to refer to
1342 any other template, class, function, object, namespace, value,
1343 or type in the same scope. */
1344 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1345 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1347 error ("declaration of template %q#D", newdecl);
1348 error ("conflicts with previous declaration %q+#D", olddecl);
1350 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1351 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1352 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1353 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1354 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1355 DECL_TEMPLATE_PARMS (olddecl))
1356 /* Template functions can be disambiguated by
1358 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1359 TREE_TYPE (TREE_TYPE (olddecl))))
1361 error ("new declaration %q#D", newdecl);
1362 error ("ambiguates old declaration %q+#D", olddecl);
1366 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1368 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1370 error ("declaration of C function %q#D conflicts with",
1372 error ("previous declaration %q+#D here", olddecl);
1374 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1377 error ("new declaration %q#D", newdecl);
1378 error ("ambiguates old declaration %q+#D", olddecl);
1379 return error_mark_node;
1386 error ("conflicting declaration %q#D", newdecl);
1387 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1388 return error_mark_node;
1391 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1392 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1393 && (!DECL_TEMPLATE_INFO (newdecl)
1394 || (DECL_TI_TEMPLATE (newdecl)
1395 != DECL_TI_TEMPLATE (olddecl))))
1396 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1397 && (!DECL_TEMPLATE_INFO (olddecl)
1398 || (DECL_TI_TEMPLATE (olddecl)
1399 != DECL_TI_TEMPLATE (newdecl))))))
1400 /* It's OK to have a template specialization and a non-template
1401 with the same type, or to have specializations of two
1402 different templates with the same type. Note that if one is a
1403 specialization, and the other is an instantiation of the same
1404 template, that we do not exit at this point. That situation
1405 can occur if we instantiate a template class, and then
1406 specialize one of its methods. This situation is valid, but
1407 the declarations must be merged in the usual way. */
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1411 && !DECL_USE_TEMPLATE (newdecl))
1412 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1413 && !DECL_USE_TEMPLATE (olddecl))))
1414 /* One of the declarations is a template instantiation, and the
1415 other is not a template at all. That's OK. */
1417 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1419 /* In [namespace.alias] we have:
1421 In a declarative region, a namespace-alias-definition can be
1422 used to redefine a namespace-alias declared in that declarative
1423 region to refer only to the namespace to which it already
1426 Therefore, if we encounter a second alias directive for the same
1427 alias, we can just ignore the second directive. */
1428 if (DECL_NAMESPACE_ALIAS (newdecl)
1429 && (DECL_NAMESPACE_ALIAS (newdecl)
1430 == DECL_NAMESPACE_ALIAS (olddecl)))
1432 /* [namespace.alias]
1434 A namespace-name or namespace-alias shall not be declared as
1435 the name of any other entity in the same declarative region.
1436 A namespace-name defined at global scope shall not be
1437 declared as the name of any other entity in any global scope
1439 error ("declaration of namespace %qD conflicts with", newdecl);
1440 error ("previous declaration of namespace %q+D here", olddecl);
1441 return error_mark_node;
1445 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1448 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1449 if (DECL_NAME (olddecl) != NULL_TREE)
1450 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1451 ? "%q+#D previously defined here"
1452 : "%q+#D previously declared here", olddecl);
1453 return error_mark_node;
1455 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1456 && DECL_INITIAL (olddecl) != NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1458 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1460 /* Prototype decl follows defn w/o prototype. */
1461 warning (0, "prototype for %q+#D", newdecl);
1462 warning (0, "%Jfollows non-prototype definition here", olddecl);
1464 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1465 || TREE_CODE (olddecl) == VAR_DECL)
1466 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1469 If two declarations of the same function or object
1470 specify different linkage-specifications ..., the program
1471 is ill-formed.... Except for functions with C++ linkage,
1472 a function declaration without a linkage specification
1473 shall not precede the first linkage specification for
1474 that function. A function can be declared without a
1475 linkage specification after an explicit linkage
1476 specification has been seen; the linkage explicitly
1477 specified in the earlier declaration is not affected by
1478 such a function declaration.
1480 DR 563 raises the question why the restrictions on
1481 functions should not also apply to objects. Older
1482 versions of G++ silently ignore the linkage-specification
1490 which is clearly wrong. Therefore, we now treat objects
1492 if (current_lang_depth () == 0)
1494 /* There is no explicit linkage-specification, so we use
1495 the linkage from the previous declaration. */
1496 if (!DECL_LANG_SPECIFIC (newdecl))
1497 retrofit_lang_decl (newdecl);
1498 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1502 error ("previous declaration of %q+#D with %qL linkage",
1503 olddecl, DECL_LANGUAGE (olddecl));
1504 error ("conflicts with new declaration with %qL linkage",
1505 DECL_LANGUAGE (newdecl));
1509 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1511 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1513 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1514 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1517 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1518 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1520 for (; t1 && t1 != void_list_node;
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1522 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1524 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1527 permerror (input_location, "default argument given for parameter %d of %q#D",
1529 permerror (input_location, "after previous specification in %q+#D", olddecl);
1533 error ("default argument given for parameter %d of %q#D",
1535 error ("after previous specification in %q+#D",
1542 /* Do not merge an implicit typedef with an explicit one. In:
1546 typedef class A A __attribute__ ((foo));
1548 the attribute should apply only to the typedef. */
1549 if (TREE_CODE (olddecl) == TYPE_DECL
1550 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1551 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1554 /* If new decl is `static' and an `extern' was seen previously,
1556 warn_extern_redeclared_static (newdecl, olddecl);
1558 /* We have committed to returning 1 at this point. */
1559 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1561 /* Now that functions must hold information normally held
1562 by field decls, there is extra work to do so that
1563 declaration information does not get destroyed during
1565 if (DECL_VINDEX (olddecl))
1566 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1567 if (DECL_CONTEXT (olddecl))
1568 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1569 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1570 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1571 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1572 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1573 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1594 if (DECL_DELETED_FN (newdecl))
1596 error ("deleted definition of %qD", newdecl);
1597 error ("after previous declaration %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 DECL_ATTRIBUTES (old_result)
1632 = (*targetm.merge_decl_attributes) (old_result, new_result);
1634 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1636 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1637 && DECL_INITIAL (new_result))
1639 if (DECL_INITIAL (old_result))
1640 DECL_UNINLINABLE (old_result) = 1;
1642 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1643 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1644 DECL_NOT_REALLY_EXTERN (old_result)
1645 = DECL_NOT_REALLY_EXTERN (new_result);
1646 DECL_INTERFACE_KNOWN (old_result)
1647 = DECL_INTERFACE_KNOWN (new_result);
1648 DECL_DECLARED_INLINE_P (old_result)
1649 = DECL_DECLARED_INLINE_P (new_result);
1650 DECL_DISREGARD_INLINE_LIMITS (old_result)
1651 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1656 DECL_DECLARED_INLINE_P (old_result)
1657 |= DECL_DECLARED_INLINE_P (new_result);
1658 DECL_DISREGARD_INLINE_LIMITS (old_result)
1659 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1660 check_redeclaration_exception_specification (newdecl, olddecl);
1664 /* If the new declaration is a definition, update the file and
1665 line information on the declaration, and also make
1666 the old declaration the same definition. */
1667 if (DECL_INITIAL (new_result) != NULL_TREE)
1669 DECL_SOURCE_LOCATION (olddecl)
1670 = DECL_SOURCE_LOCATION (old_result)
1671 = DECL_SOURCE_LOCATION (newdecl);
1672 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1673 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1676 DECL_ARGUMENTS (old_result)
1677 = DECL_ARGUMENTS (new_result);
1678 for (parm = DECL_ARGUMENTS (old_result); parm;
1679 parm = TREE_CHAIN (parm))
1680 DECL_CONTEXT (parm) = old_result;
1689 /* Automatically handles default parameters. */
1690 tree oldtype = TREE_TYPE (olddecl);
1693 /* Merge the data types specified in the two decls. */
1694 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1696 /* If merge_types produces a non-typedef type, just use the old type. */
1697 if (TREE_CODE (newdecl) == TYPE_DECL
1698 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1701 if (TREE_CODE (newdecl) == VAR_DECL)
1703 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1704 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1705 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1706 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1707 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1708 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1710 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1711 if (DECL_LANG_SPECIFIC (olddecl)
1712 && CP_DECL_THREADPRIVATE_P (olddecl))
1714 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1715 if (!DECL_LANG_SPECIFIC (newdecl))
1716 retrofit_lang_decl (newdecl);
1718 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1719 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1723 /* Do this after calling `merge_types' so that default
1724 parameters don't confuse us. */
1725 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1726 check_redeclaration_exception_specification (newdecl, olddecl);
1727 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1729 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1730 check_default_args (newdecl);
1732 /* Lay the type out, unless already done. */
1733 if (! same_type_p (newtype, oldtype)
1734 && TREE_TYPE (newdecl) != error_mark_node
1735 && !(processing_template_decl && uses_template_parms (newdecl)))
1736 layout_type (TREE_TYPE (newdecl));
1738 if ((TREE_CODE (newdecl) == VAR_DECL
1739 || TREE_CODE (newdecl) == PARM_DECL
1740 || TREE_CODE (newdecl) == RESULT_DECL
1741 || TREE_CODE (newdecl) == FIELD_DECL
1742 || TREE_CODE (newdecl) == TYPE_DECL)
1743 && !(processing_template_decl && uses_template_parms (newdecl)))
1744 layout_decl (newdecl, 0);
1746 /* Merge the type qualifiers. */
1747 if (TREE_READONLY (newdecl))
1748 TREE_READONLY (olddecl) = 1;
1749 if (TREE_THIS_VOLATILE (newdecl))
1750 TREE_THIS_VOLATILE (olddecl) = 1;
1751 if (TREE_NOTHROW (newdecl))
1752 TREE_NOTHROW (olddecl) = 1;
1754 /* Merge deprecatedness. */
1755 if (TREE_DEPRECATED (newdecl))
1756 TREE_DEPRECATED (olddecl) = 1;
1758 /* Preserve function specific target and optimization options */
1759 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1761 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1762 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1763 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1764 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1766 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1767 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1768 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1769 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1772 /* Merge the initialization information. */
1773 if (DECL_INITIAL (newdecl) == NULL_TREE
1774 && DECL_INITIAL (olddecl) != NULL_TREE)
1776 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1777 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1778 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1779 && DECL_LANG_SPECIFIC (newdecl)
1780 && DECL_LANG_SPECIFIC (olddecl))
1782 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1783 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1787 /* Merge the section attribute.
1788 We want to issue an error if the sections conflict but that must be
1789 done later in decl_attributes since we are called before attributes
1791 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1792 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1794 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1796 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1797 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1798 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1799 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1800 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1801 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1802 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1803 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1804 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1805 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1806 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1807 /* Keep the old RTL. */
1808 COPY_DECL_RTL (olddecl, newdecl);
1810 else if (TREE_CODE (newdecl) == VAR_DECL
1811 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1813 /* Keep the old RTL. We cannot keep the old RTL if the old
1814 declaration was for an incomplete object and the new
1815 declaration is not since many attributes of the RTL will
1817 COPY_DECL_RTL (olddecl, newdecl);
1820 /* If cannot merge, then use the new type and qualifiers,
1821 and don't preserve the old rtl. */
1824 /* Clean out any memory we had of the old declaration. */
1825 tree oldstatic = value_member (olddecl, static_aggregates);
1827 TREE_VALUE (oldstatic) = error_mark_node;
1829 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1830 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1831 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1832 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1835 /* Merge the storage class information. */
1836 merge_weak (newdecl, olddecl);
1838 if (DECL_ONE_ONLY (olddecl))
1839 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1841 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1842 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1843 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1844 if (! DECL_EXTERNAL (olddecl))
1845 DECL_EXTERNAL (newdecl) = 0;
1847 new_template = NULL_TREE;
1848 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1850 bool new_redefines_gnu_inline = false;
1852 if (new_defines_function
1853 && ((DECL_INTERFACE_KNOWN (olddecl)
1854 && TREE_CODE (olddecl) == FUNCTION_DECL)
1855 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1856 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1857 == FUNCTION_DECL))))
1861 if (TREE_CODE (fn) == TEMPLATE_DECL)
1862 fn = DECL_TEMPLATE_RESULT (olddecl);
1864 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1867 if (!new_redefines_gnu_inline)
1869 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1870 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1871 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1873 DECL_TEMPLATE_INSTANTIATED (newdecl)
1874 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1876 /* If the OLDDECL is an instantiation and/or specialization,
1877 then the NEWDECL must be too. But, it may not yet be marked
1878 as such if the caller has created NEWDECL, but has not yet
1879 figured out that it is a redeclaration. */
1880 if (!DECL_USE_TEMPLATE (newdecl))
1881 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1883 /* Don't really know how much of the language-specific
1884 values we should copy from old to new. */
1885 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1886 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1887 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1888 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1889 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1890 if (DECL_TEMPLATE_INFO (newdecl))
1891 new_template = DECL_TI_TEMPLATE (newdecl);
1892 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1893 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1894 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1895 olddecl_friend = DECL_FRIEND_P (olddecl);
1896 hidden_friend = (DECL_ANTICIPATED (olddecl)
1897 && DECL_HIDDEN_FRIEND_P (olddecl)
1898 && newdecl_is_friend);
1900 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1901 if (TREE_CODE (newdecl) == FUNCTION_DECL
1902 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1904 DECL_BEFRIENDING_CLASSES (newdecl)
1905 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1906 DECL_BEFRIENDING_CLASSES (olddecl));
1907 /* DECL_THUNKS is only valid for virtual functions,
1908 otherwise it is a DECL_FRIEND_CONTEXT. */
1909 if (DECL_VIRTUAL_P (newdecl))
1910 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1914 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1918 /* Merge parameter attributes. */
1919 tree oldarg, newarg;
1920 for (oldarg = DECL_ARGUMENTS(olddecl),
1921 newarg = DECL_ARGUMENTS(newdecl);
1923 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1924 DECL_ATTRIBUTES (newarg)
1925 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1926 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1929 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1930 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1932 /* If newdecl is not a specialization, then it is not a
1933 template-related function at all. And that means that we
1934 should have exited above, returning 0. */
1935 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1937 if (TREE_USED (olddecl))
1938 /* From [temp.expl.spec]:
1940 If a template, a member template or the member of a class
1941 template is explicitly specialized then that
1942 specialization shall be declared before the first use of
1943 that specialization that would cause an implicit
1944 instantiation to take place, in every translation unit in
1945 which such a use occurs. */
1946 error ("explicit specialization of %qD after first use",
1949 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1951 /* Don't propagate visibility from the template to the
1952 specialization here. We'll do that in determine_visibility if
1954 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1956 /* [temp.expl.spec/14] We don't inline explicit specialization
1957 just because the primary template says so. */
1959 else if (new_defines_function && DECL_INITIAL (olddecl))
1961 /* Never inline re-defined extern inline functions.
1962 FIXME: this could be better handled by keeping both
1963 function as separate declarations. */
1964 DECL_UNINLINABLE (newdecl) = 1;
1968 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1969 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1971 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1973 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1974 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1976 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1977 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1978 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1979 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1982 /* Preserve abstractness on cloned [cd]tors. */
1983 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1985 /* Update newdecl's parms to point at olddecl. */
1986 for (parm = DECL_ARGUMENTS (newdecl); parm;
1987 parm = TREE_CHAIN (parm))
1988 DECL_CONTEXT (parm) = olddecl;
1992 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1993 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1994 COPY_DECL_RTL (newdecl, olddecl);
1996 if (! types_match || new_defines_function)
1998 /* These need to be copied so that the names are available.
1999 Note that if the types do match, we'll preserve inline
2000 info and other bits, but if not, we won't. */
2001 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2002 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2004 if (new_defines_function)
2005 /* If defining a function declared with other language
2006 linkage, use the previously declared language linkage. */
2007 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2008 else if (types_match)
2010 /* If redeclaring a builtin function, and not a definition,
2011 it stays built in. */
2012 if (DECL_BUILT_IN (olddecl))
2014 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2015 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2016 /* If we're keeping the built-in definition, keep the rtl,
2017 regardless of declaration matches. */
2018 COPY_DECL_RTL (olddecl, newdecl);
2021 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2022 /* Don't clear out the arguments if we're just redeclaring a
2024 if (DECL_ARGUMENTS (olddecl))
2025 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2028 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2029 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2031 /* Now preserve various other info from the definition. */
2032 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2033 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2034 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2035 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2037 /* Warn about conflicting visibility specifications. */
2038 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2039 && DECL_VISIBILITY_SPECIFIED (newdecl)
2040 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2042 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2043 "because it", newdecl);
2044 warning (OPT_Wattributes, "%Jconflicts with previous "
2045 "declaration here", olddecl);
2047 /* Choose the declaration which specified visibility. */
2048 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2050 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2051 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2053 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2054 so keep this behavior. */
2055 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2057 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2058 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2061 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2062 with that from NEWDECL below. */
2063 if (DECL_LANG_SPECIFIC (olddecl))
2065 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2066 != DECL_LANG_SPECIFIC (newdecl));
2067 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2070 /* Merge the USED information. */
2071 if (TREE_USED (olddecl))
2072 TREE_USED (newdecl) = 1;
2073 else if (TREE_USED (newdecl))
2074 TREE_USED (olddecl) = 1;
2076 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2080 function_size = sizeof (struct tree_decl_common);
2082 memcpy ((char *) olddecl + sizeof (struct tree_common),
2083 (char *) newdecl + sizeof (struct tree_common),
2084 function_size - sizeof (struct tree_common));
2086 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2087 (char *) newdecl + sizeof (struct tree_decl_common),
2088 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2090 /* If newdecl is a template instantiation, it is possible that
2091 the following sequence of events has occurred:
2093 o A friend function was declared in a class template. The
2094 class template was instantiated.
2096 o The instantiation of the friend declaration was
2097 recorded on the instantiation list, and is newdecl.
2099 o Later, however, instantiate_class_template called pushdecl
2100 on the newdecl to perform name injection. But, pushdecl in
2101 turn called duplicate_decls when it discovered that another
2102 declaration of a global function with the same name already
2105 o Here, in duplicate_decls, we decided to clobber newdecl.
2107 If we're going to do that, we'd better make sure that
2108 olddecl, and not newdecl, is on the list of
2109 instantiations so that if we try to do the instantiation
2110 again we won't get the clobbered declaration. */
2111 reregister_specialization (newdecl,
2117 size_t size = tree_code_size (TREE_CODE (olddecl));
2118 memcpy ((char *) olddecl + sizeof (struct tree_common),
2119 (char *) newdecl + sizeof (struct tree_common),
2120 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2121 switch (TREE_CODE (olddecl))
2131 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2132 (char *) newdecl + sizeof (struct tree_decl_common),
2133 size - sizeof (struct tree_decl_common)
2134 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2138 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2139 (char *) newdecl + sizeof (struct tree_decl_common),
2140 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2141 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2145 DECL_UID (olddecl) = olddecl_uid;
2147 DECL_FRIEND_P (olddecl) = 1;
2150 DECL_ANTICIPATED (olddecl) = 1;
2151 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2154 /* NEWDECL contains the merged attribute lists.
2155 Update OLDDECL to be the same. */
2156 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2158 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2159 so that encode_section_info has a chance to look at the new decl
2160 flags and attributes. */
2161 if (DECL_RTL_SET_P (olddecl)
2162 && (TREE_CODE (olddecl) == FUNCTION_DECL
2163 || (TREE_CODE (olddecl) == VAR_DECL
2164 && TREE_STATIC (olddecl))))
2165 make_decl_rtl (olddecl);
2167 /* The NEWDECL will no longer be needed. Because every out-of-class
2168 declaration of a member results in a call to duplicate_decls,
2169 freeing these nodes represents in a significant savings. */
2175 /* Return zero if the declaration NEWDECL is valid
2176 when the declaration OLDDECL (assumed to be for the same name)
2177 has already been seen.
2178 Otherwise return an error message format string with a %s
2179 where the identifier should go. */
2182 redeclaration_error_message (tree newdecl, tree olddecl)
2184 if (TREE_CODE (newdecl) == TYPE_DECL)
2186 /* Because C++ can put things into name space for free,
2187 constructs like "typedef struct foo { ... } foo"
2188 would look like an erroneous redeclaration. */
2189 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2192 return "redefinition of %q#D";
2194 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2196 /* If this is a pure function, its olddecl will actually be
2197 the original initialization to `0' (which we force to call
2198 abort()). Don't complain about redefinition in this case. */
2199 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2200 && DECL_INITIAL (olddecl) == NULL_TREE)
2203 /* If both functions come from different namespaces, this is not
2204 a redeclaration - this is a conflict with a used function. */
2205 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2206 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2207 && ! decls_match (olddecl, newdecl))
2208 return "%qD conflicts with used function";
2210 /* We'll complain about linkage mismatches in
2211 warn_extern_redeclared_static. */
2213 /* Defining the same name twice is no good. */
2214 if (DECL_INITIAL (olddecl) != NULL_TREE
2215 && DECL_INITIAL (newdecl) != NULL_TREE)
2217 if (DECL_NAME (olddecl) == NULL_TREE)
2218 return "%q#D not declared in class";
2219 else if (!GNU_INLINE_P (olddecl)
2220 || GNU_INLINE_P (newdecl))
2221 return "redefinition of %q#D";
2224 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2226 bool olda = GNU_INLINE_P (olddecl);
2227 bool newa = GNU_INLINE_P (newdecl);
2232 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2234 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2240 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2244 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2246 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2247 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2248 return "redefinition of %q#D";
2252 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2253 || (DECL_TEMPLATE_RESULT (newdecl)
2254 == DECL_TEMPLATE_RESULT (olddecl)))
2257 nt = DECL_TEMPLATE_RESULT (newdecl);
2258 if (DECL_TEMPLATE_INFO (nt))
2259 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2260 ot = DECL_TEMPLATE_RESULT (olddecl);
2261 if (DECL_TEMPLATE_INFO (ot))
2262 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2263 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2264 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2265 return "redefinition of %q#D";
2267 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2269 bool olda = GNU_INLINE_P (ot);
2270 bool newa = GNU_INLINE_P (nt);
2275 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2277 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2281 /* Core issue #226 (C++0x):
2283 If a friend function template declaration specifies a
2284 default template-argument, that declaration shall be a
2285 definition and shall be the only declaration of the
2286 function template in the translation unit. */
2287 if ((cxx_dialect != cxx98)
2288 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2289 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2290 /*is_primary=*/1, /*is_partial=*/0,
2291 /*is_friend_decl=*/2))
2292 return "redeclaration of friend %q#D may not have default template arguments";
2296 else if (TREE_CODE (newdecl) == VAR_DECL
2297 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2298 && (! DECL_LANG_SPECIFIC (olddecl)
2299 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2300 || DECL_THREAD_LOCAL_P (newdecl)))
2302 /* Only variables can be thread-local, and all declarations must
2303 agree on this property. */
2304 if (DECL_THREAD_LOCAL_P (newdecl))
2305 return "thread-local declaration of %q#D follows "
2306 "non-thread-local declaration";
2308 return "non-thread-local declaration of %q#D follows "
2309 "thread-local declaration";
2311 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2313 /* The objects have been declared at namespace scope. If either
2314 is a member of an anonymous union, then this is an invalid
2315 redeclaration. For example:
2321 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2322 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2323 return "redeclaration of %q#D";
2324 /* If at least one declaration is a reference, there is no
2325 conflict. For example:
2331 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2333 /* Reject two definitions. */
2334 return "redefinition of %q#D";
2338 /* Objects declared with block scope: */
2339 /* Reject two definitions, and reject a definition
2340 together with an external reference. */
2341 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2342 return "redeclaration of %q#D";
2347 /* Hash and equality functions for the named_label table. */
2350 named_label_entry_hash (const void *data)
2352 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2353 return DECL_UID (ent->label_decl);
2357 named_label_entry_eq (const void *a, const void *b)
2359 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2360 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2361 return ent_a->label_decl == ent_b->label_decl;
2364 /* Create a new label, named ID. */
2367 make_label_decl (tree id, int local_p)
2369 struct named_label_entry *ent;
2373 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2375 DECL_CONTEXT (decl) = current_function_decl;
2376 DECL_MODE (decl) = VOIDmode;
2377 C_DECLARED_LABEL_FLAG (decl) = local_p;
2379 /* Say where one reference is to the label, for the sake of the
2380 error if it is not defined. */
2381 DECL_SOURCE_LOCATION (decl) = input_location;
2383 /* Record the fact that this identifier is bound to this label. */
2384 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2386 /* Create the label htab for the function on demand. */
2388 named_labels = htab_create_ggc (13, named_label_entry_hash,
2389 named_label_entry_eq, NULL);
2391 /* Record this label on the list of labels used in this function.
2392 We do this before calling make_label_decl so that we get the
2393 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2394 ent = GGC_CNEW (struct named_label_entry);
2395 ent->label_decl = decl;
2397 slot = htab_find_slot (named_labels, ent, INSERT);
2398 gcc_assert (*slot == NULL);
2404 /* Look for a label named ID in the current function. If one cannot
2405 be found, create one. (We keep track of used, but undefined,
2406 labels, and complain about them at the end of a function.) */
2409 lookup_label (tree id)
2413 timevar_push (TV_NAME_LOOKUP);
2414 /* You can't use labels at global scope. */
2415 if (current_function_decl == NULL_TREE)
2417 error ("label %qE referenced outside of any function", id);
2418 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2421 /* See if we've already got this label. */
2422 decl = IDENTIFIER_LABEL_VALUE (id);
2423 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2424 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2426 decl = make_label_decl (id, /*local_p=*/0);
2427 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2430 /* Declare a local label named ID. */
2433 declare_local_label (tree id)
2437 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2438 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2439 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2440 current_binding_level->shadowed_labels);
2441 current_binding_level->shadowed_labels = shadow;
2443 decl = make_label_decl (id, /*local_p=*/1);
2444 TREE_VALUE (shadow) = decl;
2449 /* Returns nonzero if it is ill-formed to jump past the declaration of
2450 DECL. Returns 2 if it's also a real problem. */
2453 decl_jump_unsafe (tree decl)
2455 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2456 || TREE_TYPE (decl) == error_mark_node)
2459 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2460 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2463 if (pod_type_p (TREE_TYPE (decl)))
2466 /* The POD stuff is just pedantry; why should it matter if the class
2467 contains a field of pointer to member type? */
2471 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2474 identify_goto (tree decl, const location_t *locus)
2477 permerror (input_location, "jump to label %qD", decl);
2479 permerror (input_location, "jump to case label");
2481 permerror (input_location, "%H from here", locus);
2484 /* Check that a single previously seen jump to a newly defined label
2485 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2486 the jump context; NAMES are the names in scope in LEVEL at the jump
2487 context; LOCUS is the source position of the jump or 0. Returns
2488 true if all is well. */
2491 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2492 bool exited_omp, const location_t *locus)
2494 struct cp_binding_level *b;
2495 bool identified = false, saw_eh = false, saw_omp = false;
2499 identify_goto (decl, locus);
2500 error (" exits OpenMP structured block");
2501 identified = saw_omp = true;
2504 for (b = current_binding_level; b ; b = b->level_chain)
2506 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2508 for (new_decls = b->names; new_decls != old_decls;
2509 new_decls = TREE_CHAIN (new_decls))
2511 int problem = decl_jump_unsafe (new_decls);
2517 identify_goto (decl, locus);
2521 error (" crosses initialization of %q+#D", new_decls);
2523 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2528 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2532 identify_goto (decl, locus);
2535 if (b->kind == sk_try)
2536 error (" enters try block");
2538 error (" enters catch block");
2541 if (b->kind == sk_omp && !saw_omp)
2545 identify_goto (decl, locus);
2548 error (" enters OpenMP structured block");
2557 check_previous_goto (tree decl, struct named_label_use_entry *use)
2559 check_previous_goto_1 (decl, use->binding_level,
2560 use->names_in_scope, use->in_omp_scope,
2561 &use->o_goto_locus);
2565 check_switch_goto (struct cp_binding_level* level)
2567 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2570 /* Check that a new jump to a label DECL is OK. Called by
2571 finish_goto_stmt. */
2574 check_goto (tree decl)
2576 struct named_label_entry *ent, dummy;
2577 bool saw_catch = false, identified = false;
2580 /* We can't know where a computed goto is jumping.
2581 So we assume that it's OK. */
2582 if (TREE_CODE (decl) != LABEL_DECL)
2585 /* We didn't record any information about this label when we created it,
2586 and there's not much point since it's trivial to analyze as a return. */
2587 if (decl == cdtor_label)
2590 dummy.label_decl = decl;
2591 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2592 gcc_assert (ent != NULL);
2594 /* If the label hasn't been defined yet, defer checking. */
2595 if (! DECL_INITIAL (decl))
2597 struct named_label_use_entry *new_use;
2599 /* Don't bother creating another use if the last goto had the
2600 same data, and will therefore create the same set of errors. */
2602 && ent->uses->names_in_scope == current_binding_level->names)
2605 new_use = GGC_NEW (struct named_label_use_entry);
2606 new_use->binding_level = current_binding_level;
2607 new_use->names_in_scope = current_binding_level->names;
2608 new_use->o_goto_locus = input_location;
2609 new_use->in_omp_scope = false;
2611 new_use->next = ent->uses;
2612 ent->uses = new_use;
2616 if (ent->in_try_scope || ent->in_catch_scope
2617 || ent->in_omp_scope || ent->bad_decls)
2619 permerror (input_location, "jump to label %q+D", decl);
2620 permerror (input_location, " from here");
2624 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2626 tree b = TREE_VALUE (bad);
2627 int u = decl_jump_unsafe (b);
2629 if (u > 1 && DECL_ARTIFICIAL (b))
2631 /* Can't skip init of __exception_info. */
2632 error ("%J enters catch block", b);
2636 error (" skips initialization of %q+#D", b);
2638 permerror (input_location, " enters scope of non-POD %q+#D", b);
2641 if (ent->in_try_scope)
2642 error (" enters try block");
2643 else if (ent->in_catch_scope && !saw_catch)
2644 error (" enters catch block");
2646 if (ent->in_omp_scope)
2647 error (" enters OpenMP structured block");
2648 else if (flag_openmp)
2650 struct cp_binding_level *b;
2651 for (b = current_binding_level; b ; b = b->level_chain)
2653 if (b == ent->binding_level)
2655 if (b->kind == sk_omp)
2659 permerror (input_location, "jump to label %q+D", decl);
2660 permerror (input_location, " from here");
2663 error (" exits OpenMP structured block");
2670 /* Check that a return is ok wrt OpenMP structured blocks.
2671 Called by finish_return_stmt. Returns true if all is well. */
2674 check_omp_return (void)
2676 struct cp_binding_level *b;
2677 for (b = current_binding_level; b ; b = b->level_chain)
2678 if (b->kind == sk_omp)
2680 error ("invalid exit from OpenMP structured block");
2686 /* Define a label, specifying the location in the source file.
2687 Return the LABEL_DECL node for the label. */
2690 define_label (location_t location, tree name)
2692 struct named_label_entry *ent, dummy;
2693 struct cp_binding_level *p;
2696 timevar_push (TV_NAME_LOOKUP);
2698 decl = lookup_label (name);
2700 dummy.label_decl = decl;
2701 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2702 gcc_assert (ent != NULL);
2704 /* After labels, make any new cleanups in the function go into their
2705 own new (temporary) binding contour. */
2706 for (p = current_binding_level;
2707 p->kind != sk_function_parms;
2709 p->more_cleanups_ok = 0;
2711 if (name == get_identifier ("wchar_t"))
2712 permerror (input_location, "label named wchar_t");
2714 if (DECL_INITIAL (decl) != NULL_TREE)
2716 error ("duplicate label %qD", decl);
2717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2721 struct named_label_use_entry *use;
2723 /* Mark label as having been defined. */
2724 DECL_INITIAL (decl) = error_mark_node;
2725 /* Say where in the source. */
2726 DECL_SOURCE_LOCATION (decl) = location;
2728 ent->binding_level = current_binding_level;
2729 ent->names_in_scope = current_binding_level->names;
2731 for (use = ent->uses; use ; use = use->next)
2732 check_previous_goto (decl, use);
2736 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2741 struct cp_binding_level *level;
2742 struct cp_switch *next;
2743 /* The SWITCH_STMT being built. */
2745 /* A splay-tree mapping the low element of a case range to the high
2746 element, or NULL_TREE if there is no high element. Used to
2747 determine whether or not a new case label duplicates an old case
2748 label. We need a tree, rather than simply a hash table, because
2749 of the GNU case range extension. */
2753 /* A stack of the currently active switch statements. The innermost
2754 switch statement is on the top of the stack. There is no need to
2755 mark the stack for garbage collection because it is only active
2756 during the processing of the body of a function, and we never
2757 collect at that point. */
2759 static struct cp_switch *switch_stack;
2761 /* Called right after a switch-statement condition is parsed.
2762 SWITCH_STMT is the switch statement being parsed. */
2765 push_switch (tree switch_stmt)
2767 struct cp_switch *p = XNEW (struct cp_switch);
2768 p->level = current_binding_level;
2769 p->next = switch_stack;
2770 p->switch_stmt = switch_stmt;
2771 p->cases = splay_tree_new (case_compare, NULL, NULL);
2778 struct cp_switch *cs = switch_stack;
2779 location_t switch_location;
2781 /* Emit warnings as needed. */
2782 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2783 switch_location = EXPR_LOCATION (cs->switch_stmt);
2785 switch_location = input_location;
2786 if (!processing_template_decl)
2787 c_do_switch_warnings (cs->cases, switch_location,
2788 SWITCH_STMT_TYPE (cs->switch_stmt),
2789 SWITCH_STMT_COND (cs->switch_stmt));
2791 splay_tree_delete (cs->cases);
2792 switch_stack = switch_stack->next;
2796 /* Note that we've seen a definition of a case label, and complain if this
2797 is a bad place for one. */
2800 finish_case_label (location_t loc, tree low_value, tree high_value)
2803 struct cp_binding_level *p;
2805 if (processing_template_decl)
2809 /* For templates, just add the case label; we'll do semantic
2810 analysis at instantiation-time. */
2811 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2812 return add_stmt (build_case_label (loc, low_value, high_value, label));
2815 /* Find the condition on which this switch statement depends. */
2816 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2817 if (cond && TREE_CODE (cond) == TREE_LIST)
2818 cond = TREE_VALUE (cond);
2820 if (!check_switch_goto (switch_stack->level))
2821 return error_mark_node;
2823 r = c_add_case_label (loc, switch_stack->cases, cond,
2824 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2825 low_value, high_value);
2827 /* After labels, make any new cleanups in the function go into their
2828 own new (temporary) binding contour. */
2829 for (p = current_binding_level;
2830 p->kind != sk_function_parms;
2832 p->more_cleanups_ok = 0;
2837 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2840 typename_hash (const void* k)
2843 const_tree const t = (const_tree) k;
2845 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2846 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2851 typedef struct typename_info {
2859 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2860 really of type `typename_info*' */
2863 typename_compare (const void * k1, const void * k2)
2865 const_tree const t1 = (const_tree) k1;
2866 const typename_info *const t2 = (const typename_info *) k2;
2868 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2869 && TYPE_CONTEXT (t1) == t2->scope
2870 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2871 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2872 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2875 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2876 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2878 Returns the new TYPENAME_TYPE. */
2880 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2883 build_typename_type (tree context, tree name, tree fullname,
2884 enum tag_types tag_type)
2892 if (typename_htab == NULL)
2893 typename_htab = htab_create_ggc (61, &typename_hash,
2894 &typename_compare, NULL);
2896 ti.scope = FROB_CONTEXT (context);
2898 ti.template_id = fullname;
2899 ti.enum_p = tag_type == enum_type;
2900 ti.class_p = (tag_type == class_type
2901 || tag_type == record_type
2902 || tag_type == union_type);
2903 hash = (htab_hash_pointer (ti.scope)
2904 ^ htab_hash_pointer (ti.name));
2906 /* See if we already have this type. */
2907 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2912 /* Build the TYPENAME_TYPE. */
2913 t = cxx_make_type (TYPENAME_TYPE);
2914 TYPE_CONTEXT (t) = ti.scope;
2915 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2916 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2917 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2919 /* Build the corresponding TYPE_DECL. */
2920 d = build_decl (input_location, TYPE_DECL, name, t);
2921 TYPE_NAME (TREE_TYPE (d)) = d;
2922 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2923 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2924 DECL_ARTIFICIAL (d) = 1;
2926 /* Store it in the hash table. */
2929 /* TYPENAME_TYPEs must always be compared structurally, because
2930 they may or may not resolve down to another type depending on
2931 the currently open classes. */
2932 SET_TYPE_STRUCTURAL_EQUALITY (t);
2938 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2939 provided to name the type. Returns an appropriate type, unless an
2940 error occurs, in which case error_mark_node is returned. If we
2941 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2942 return that, rather than the _TYPE it corresponds to, in other
2943 cases we look through the type decl. If TF_ERROR is set, complain
2944 about errors, otherwise be quiet. */
2947 make_typename_type (tree context, tree name, enum tag_types tag_type,
2948 tsubst_flags_t complain)
2954 if (name == error_mark_node
2955 || context == NULL_TREE
2956 || context == error_mark_node)
2957 return error_mark_node;
2961 if (!(TYPE_LANG_SPECIFIC (name)
2962 && (CLASSTYPE_IS_TEMPLATE (name)
2963 || CLASSTYPE_USE_TEMPLATE (name))))
2964 name = TYPE_IDENTIFIER (name);
2966 /* Create a TEMPLATE_ID_EXPR for the type. */
2967 name = build_nt (TEMPLATE_ID_EXPR,
2968 CLASSTYPE_TI_TEMPLATE (name),
2969 CLASSTYPE_TI_ARGS (name));
2971 else if (TREE_CODE (name) == TYPE_DECL)
2972 name = DECL_NAME (name);
2976 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2978 name = TREE_OPERAND (name, 0);
2979 if (TREE_CODE (name) == TEMPLATE_DECL)
2980 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2981 else if (TREE_CODE (name) == OVERLOAD)
2983 error ("%qD is not a type", name);
2984 return error_mark_node;
2987 if (TREE_CODE (name) == TEMPLATE_DECL)
2989 error ("%qD used without template parameters", name);
2990 return error_mark_node;
2992 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2993 gcc_assert (TYPE_P (context));
2995 if (!MAYBE_CLASS_TYPE_P (context))
2997 if (complain & tf_error)
2998 error ("%q#T is not a class", context);
2999 return error_mark_node;
3002 /* When the CONTEXT is a dependent type, NAME could refer to a
3003 dependent base class of CONTEXT. But look inside it anyway
3004 if CONTEXT is a currently open scope, in case it refers to a
3005 member of the current instantiation or a non-dependent base;
3006 lookup will stop when we hit a dependent base. */
3007 if (!dependent_scope_p (context))
3008 /* We should only set WANT_TYPE when we're a nested typename type.
3009 Then we can give better diagnostics if we find a non-type. */
3010 t = lookup_field (context, name, 0, /*want_type=*/true);
3014 if (!t && dependent_type_p (context))
3015 return build_typename_type (context, name, fullname, tag_type);
3017 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3021 if (complain & tf_error)
3022 error (want_template ? "no class template named %q#T in %q#T"
3023 : "no type named %q#T in %q#T", name, context);
3024 return error_mark_node;
3027 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3029 if (complain & tf_error)
3030 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3032 return error_mark_node;
3034 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3036 if (complain & tf_error)
3037 error ("%<typename %T::%D%> names %q#T, which is not a type",
3039 return error_mark_node;
3042 if (complain & tf_error)
3043 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3046 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3048 /*entering_scope=*/0,
3049 tf_warning_or_error | tf_user);
3051 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3057 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3058 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3059 in which case error_mark_node is returned.
3061 If PARM_LIST is non-NULL, also make sure that the template parameter
3062 list of TEMPLATE_DECL matches.
3064 If COMPLAIN zero, don't complain about any errors that occur. */
3067 make_unbound_class_template (tree context, tree name, tree parm_list,
3068 tsubst_flags_t complain)
3074 name = TYPE_IDENTIFIER (name);
3075 else if (DECL_P (name))
3076 name = DECL_NAME (name);
3077 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3079 if (!dependent_type_p (context)
3080 || currently_open_class (context))
3082 tree tmpl = NULL_TREE;
3084 if (MAYBE_CLASS_TYPE_P (context))
3085 tmpl = lookup_field (context, name, 0, false);
3087 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3089 if (complain & tf_error)
3090 error ("no class template named %q#T in %q#T", name, context);
3091 return error_mark_node;
3095 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3097 if (complain & tf_error)
3099 error ("template parameters do not match template");
3100 error ("%q+D declared here", tmpl);
3102 return error_mark_node;
3105 if (complain & tf_error)
3106 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3111 /* Build the UNBOUND_CLASS_TEMPLATE. */
3112 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3113 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3114 TREE_TYPE (t) = NULL_TREE;
3115 SET_TYPE_STRUCTURAL_EQUALITY (t);
3117 /* Build the corresponding TEMPLATE_DECL. */
3118 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3119 TYPE_NAME (TREE_TYPE (d)) = d;
3120 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3121 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3122 DECL_ARTIFICIAL (d) = 1;
3123 DECL_TEMPLATE_PARMS (d) = parm_list;
3130 /* Push the declarations of builtin types into the namespace.
3131 RID_INDEX is the index of the builtin type in the array
3132 RID_POINTERS. NAME is the name used when looking up the builtin
3133 type. TYPE is the _TYPE node for the builtin type. */
3136 record_builtin_type (enum rid rid_index,
3140 tree rname = NULL_TREE, tname = NULL_TREE;
3141 tree tdecl = NULL_TREE;
3143 if ((int) rid_index < (int) RID_MAX)
3144 rname = ridpointers[(int) rid_index];
3146 tname = get_identifier (name);
3148 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3149 eliminated. Built-in types should not be looked up name; their
3150 names are keywords that the parser can recognize. However, there
3151 is code in c-common.c that uses identifier_global_value to look
3152 up built-in types by name. */
3155 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3156 DECL_ARTIFICIAL (tdecl) = 1;
3157 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3163 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3164 DECL_ARTIFICIAL (tdecl) = 1;
3166 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3169 if (!TYPE_NAME (type))
3170 TYPE_NAME (type) = tdecl;
3173 debug_hooks->type_decl (tdecl, 0);
3176 /* Record one of the standard Java types.
3177 * Declare it as having the given NAME.
3178 * If SIZE > 0, it is the size of one of the integral types;
3179 * otherwise it is the negative of the size of one of the other types. */
3182 record_builtin_java_type (const char* name, int size)
3186 type = build_nonstandard_integer_type (size, 0);
3187 else if (size > -32)
3190 /* "__java_char" or ""__java_boolean". */
3191 type = build_nonstandard_integer_type (-size, 1);
3192 /* Get the signed type cached and attached to the unsigned type,
3193 so it doesn't get garbage-collected at "random" times,
3194 causing potential codegen differences out of different UIDs
3195 and different alias set numbers. */
3196 stype = build_nonstandard_integer_type (-size, 0);
3197 TREE_CHAIN (type) = stype;
3198 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3201 { /* "__java_float" or ""__java_double". */
3202 type = make_node (REAL_TYPE);
3203 TYPE_PRECISION (type) = - size;
3206 record_builtin_type (RID_MAX, name, type);
3207 decl = TYPE_NAME (type);
3209 /* Suppress generate debug symbol entries for these types,
3210 since for normal C++ they are just clutter.
3211 However, push_lang_context undoes this if extern "Java" is seen. */
3212 DECL_IGNORED_P (decl) = 1;
3214 TYPE_FOR_JAVA (type) = 1;
3218 /* Push a type into the namespace so that the back ends ignore it. */
3221 record_unknown_type (tree type, const char* name)
3223 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3224 TYPE_DECL, get_identifier (name), type));
3225 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3226 DECL_IGNORED_P (decl) = 1;
3227 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3228 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3229 TYPE_ALIGN (type) = 1;
3230 TYPE_USER_ALIGN (type) = 0;
3231 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3234 /* A string for which we should create an IDENTIFIER_NODE at
3237 typedef struct predefined_identifier
3239 /* The name of the identifier. */
3240 const char *const name;
3241 /* The place where the IDENTIFIER_NODE should be stored. */
3243 /* Nonzero if this is the name of a constructor or destructor. */
3244 const int ctor_or_dtor_p;
3245 } predefined_identifier;
3247 /* Create all the predefined identifiers. */
3250 initialize_predefined_identifiers (void)
3252 const predefined_identifier *pid;
3254 /* A table of identifiers to create at startup. */
3255 static const predefined_identifier predefined_identifiers[] = {
3256 { "C++", &lang_name_cplusplus, 0 },
3257 { "C", &lang_name_c, 0 },
3258 { "Java", &lang_name_java, 0 },
3259 /* Some of these names have a trailing space so that it is
3260 impossible for them to conflict with names written by users. */
3261 { "__ct ", &ctor_identifier, 1 },
3262 { "__base_ctor ", &base_ctor_identifier, 1 },
3263 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3264 { "__dt ", &dtor_identifier, 1 },
3265 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3266 { "__base_dtor ", &base_dtor_identifier, 1 },
3267 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3268 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3269 { "nelts", &nelts_identifier, 0 },
3270 { THIS_NAME, &this_identifier, 0 },
3271 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3272 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3273 { "_vptr", &vptr_identifier, 0 },
3274 { "__vtt_parm", &vtt_parm_identifier, 0 },
3275 { "::", &global_scope_name, 0 },
3276 { "std", &std_identifier, 0 },
3280 for (pid = predefined_identifiers; pid->name; ++pid)
3282 *pid->node = get_identifier (pid->name);
3283 if (pid->ctor_or_dtor_p)
3284 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3288 /* Create the predefined scalar types of C,
3289 and some nodes representing standard constants (0, 1, (void *)0).
3290 Initialize the global binding level.
3291 Make definitions for built-in primitive functions. */
3294 cxx_init_decl_processing (void)
3297 tree void_ftype_ptr;
3299 build_common_tree_nodes (flag_signed_char, false);
3301 /* Create all the identifiers we need. */
3302 initialize_predefined_identifiers ();
3304 /* Create the global variables. */
3305 push_to_top_level ();
3307 current_function_decl = NULL_TREE;
3308 current_binding_level = NULL;
3309 /* Enter the global namespace. */
3310 gcc_assert (global_namespace == NULL_TREE);
3311 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3313 TREE_PUBLIC (global_namespace) = 1;
3314 begin_scope (sk_namespace, global_namespace);
3316 current_lang_name = NULL_TREE;
3318 if (flag_visibility_ms_compat)
3319 default_visibility = VISIBILITY_HIDDEN;
3322 current_lang_name = lang_name_c;
3324 /* Create the `std' namespace. */
3325 push_namespace (std_identifier);
3326 std_node = current_namespace;
3329 c_common_nodes_and_builtins ();
3331 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3332 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3333 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3334 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3335 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3336 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3337 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3338 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3340 integer_two_node = build_int_cst (NULL_TREE, 2);
3341 integer_three_node = build_int_cst (NULL_TREE, 3);
3343 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3344 truthvalue_type_node = boolean_type_node;
3345 truthvalue_false_node = boolean_false_node;
3346 truthvalue_true_node = boolean_true_node;
3348 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3351 record_builtin_type (RID_MAX, NULL, string_type_node);
3354 delta_type_node = ptrdiff_type_node;
3355 vtable_index_type = ptrdiff_type_node;
3357 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3358 void_ftype = build_function_type (void_type_node, void_list_node);
3359 void_ftype_ptr = build_function_type (void_type_node,
3360 tree_cons (NULL_TREE,
3364 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3366 /* C++ extensions */
3368 unknown_type_node = make_node (UNKNOWN_TYPE);
3369 record_unknown_type (unknown_type_node, "unknown type");
3371 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3372 TREE_TYPE (unknown_type_node) = unknown_type_node;
3374 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3376 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3377 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3379 init_list_type_node = make_node (UNKNOWN_TYPE);
3380 record_unknown_type (init_list_type_node, "init list");
3383 /* Make sure we get a unique function type, so we can give
3384 its pointer type a name. (This wins for gdb.) */
3385 tree vfunc_type = make_node (FUNCTION_TYPE);
3386 TREE_TYPE (vfunc_type) = integer_type_node;
3387 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3388 layout_type (vfunc_type);
3390 vtable_entry_type = build_pointer_type (vfunc_type);
3392 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3395 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3396 layout_type (vtbl_type_node);
3397 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3398 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3399 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3400 layout_type (vtbl_ptr_type_node);
3401 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3403 push_namespace (get_identifier ("__cxxabiv1"));
3404 abi_node = current_namespace;
3407 global_type_node = make_node (LANG_TYPE);
3408 record_unknown_type (global_type_node, "global type");
3411 current_lang_name = lang_name_cplusplus;
3415 tree bad_alloc_type_node;
3416 tree bad_alloc_decl;
3417 tree newtype, deltype;
3418 tree ptr_ftype_sizetype;
3420 push_namespace (std_identifier);
3421 bad_alloc_id = get_identifier ("bad_alloc");
3422 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3423 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3425 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3426 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3427 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3431 = build_function_type (ptr_type_node,
3432 tree_cons (NULL_TREE,
3435 newtype = build_exception_variant
3436 (ptr_ftype_sizetype, add_exception_specifier
3437 (NULL_TREE, bad_alloc_type_node, -1));
3438 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3439 push_cp_library_fn (NEW_EXPR, newtype);
3440 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3441 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3442 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3446 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3448 /* Perform other language dependent initializations. */
3449 init_class_processing ();
3450 init_rtti_processing ();
3452 if (flag_exceptions)
3453 init_exception_processing ();
3455 if (! supports_one_only ())
3458 make_fname_decl = cp_make_fname_decl;
3459 start_fname_decls ();
3461 /* Show we use EH for cleanups. */
3462 if (flag_exceptions)
3463 using_eh_for_cleanups ();
3466 /* Generate an initializer for a function naming variable from
3467 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3468 filled in with the type of the init. */
3471 cp_fname_init (const char* name, tree *type_p)
3473 tree domain = NULL_TREE;
3475 tree init = NULL_TREE;
3480 length = strlen (name);
3481 domain = build_index_type (size_int (length));
3482 init = build_string (length + 1, name);
3485 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3486 type = build_cplus_array_type (type, domain);
3491 TREE_TYPE (init) = type;
3493 init = error_mark_node;
3498 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3499 the decl, LOC is the location to give the decl, NAME is the
3500 initialization string and TYPE_DEP indicates whether NAME depended
3501 on the type of the function. We make use of that to detect
3502 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3503 at the point of first use, so we mustn't push the decl now. */
3506 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3508 const char *const name = (type_dep && processing_template_decl
3509 ? NULL : fname_as_string (type_dep));
3511 tree init = cp_fname_init (name, &type);
3512 tree decl = build_decl (loc, VAR_DECL, id, type);
3515 free (CONST_CAST (char *, name));
3517 /* As we're using pushdecl_with_scope, we must set the context. */
3518 DECL_CONTEXT (decl) = current_function_decl;
3519 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3521 TREE_STATIC (decl) = 1;
3522 TREE_READONLY (decl) = 1;
3523 DECL_ARTIFICIAL (decl) = 1;
3525 TREE_USED (decl) = 1;
3527 if (current_function_decl)
3529 struct cp_binding_level *b = current_binding_level;
3530 while (b->level_chain->kind != sk_function_parms)
3532 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3533 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3534 LOOKUP_ONLYCONVERTING);
3537 pushdecl_top_level_and_finish (decl, init);
3543 builtin_function_1 (tree decl, tree context, bool is_global)
3545 tree id = DECL_NAME (decl);
3546 const char *name = IDENTIFIER_POINTER (id);
3548 retrofit_lang_decl (decl);
3550 /* All nesting of C++ functions is lexical; there is never a "static
3551 chain" in the sense of GNU C nested functions. */
3552 DECL_NO_STATIC_CHAIN (decl) = 1;
3554 DECL_ARTIFICIAL (decl) = 1;
3555 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3556 SET_DECL_LANGUAGE (decl, lang_c);
3557 /* Runtime library routines are, by definition, available in an
3558 external shared object. */
3559 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3560 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3562 DECL_CONTEXT (decl) = context;
3565 pushdecl_top_level (decl);
3569 /* A function in the user's namespace should have an explicit
3570 declaration before it is used. Mark the built-in function as
3571 anticipated but not actually declared. */
3572 if (name[0] != '_' || name[1] != '_')
3573 DECL_ANTICIPATED (decl) = 1;
3574 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3576 size_t len = strlen (name);
3578 /* Treat __*_chk fortification functions as anticipated as well,
3579 unless they are __builtin_*. */
3580 if (len > strlen ("___chk")
3581 && memcmp (name + len - strlen ("_chk"),
3582 "_chk", strlen ("_chk") + 1) == 0)
3583 DECL_ANTICIPATED (decl) = 1;
3590 cxx_builtin_function (tree decl)
3592 tree id = DECL_NAME (decl);
3593 const char *name = IDENTIFIER_POINTER (id);
3594 /* All builtins that don't begin with an '_' should additionally
3595 go in the 'std' namespace. */
3598 tree decl2 = copy_node(decl);
3599 push_namespace (std_identifier);
3600 builtin_function_1 (decl2, std_node, false);
3604 return builtin_function_1 (decl, NULL_TREE, false);
3607 /* Like cxx_builtin_function, but guarantee the function is added to the global
3608 scope. This is to allow function specific options to add new machine
3609 dependent builtins when the target ISA changes via attribute((target(...)))
3610 which saves space on program startup if the program does not use non-generic
3614 cxx_builtin_function_ext_scope (tree decl)
3617 tree id = DECL_NAME (decl);
3618 const char *name = IDENTIFIER_POINTER (id);
3619 /* All builtins that don't begin with an '_' should additionally
3620 go in the 'std' namespace. */
3623 tree decl2 = copy_node(decl);
3624 push_namespace (std_identifier);
3625 builtin_function_1 (decl2, std_node, true);
3629 return builtin_function_1 (decl, NULL_TREE, true);
3632 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3633 function. Not called directly. */
3636 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3638 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3639 DECL_EXTERNAL (fn) = 1;
3640 TREE_PUBLIC (fn) = 1;
3641 DECL_ARTIFICIAL (fn) = 1;
3642 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3643 SET_DECL_LANGUAGE (fn, lang_c);
3644 /* Runtime library routines are, by definition, available in an
3645 external shared object. */
3646 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3647 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3651 /* Returns the _DECL for a library function with C linkage.
3652 We assume that such functions never throw; if this is incorrect,
3653 callers should unset TREE_NOTHROW. */
3656 build_library_fn (tree name, tree type)
3658 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3659 TREE_NOTHROW (fn) = 1;
3663 /* Returns the _DECL for a library function with C++ linkage. */
3666 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3668 tree fn = build_library_fn_1 (name, operator_code, type);
3669 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3670 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3671 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3675 /* Like build_library_fn, but takes a C string instead of an
3679 build_library_fn_ptr (const char* name, tree type)
3681 return build_library_fn (get_identifier (name), type);
3684 /* Like build_cp_library_fn, but takes a C string instead of an
3688 build_cp_library_fn_ptr (const char* name, tree type)
3690 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3693 /* Like build_library_fn, but also pushes the function so that we will
3694 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3695 may throw exceptions listed in RAISES. */
3698 push_library_fn (tree name, tree type, tree raises)
3703 type = build_exception_variant (type, raises);
3705 fn = build_library_fn (name, type);
3706 pushdecl_top_level (fn);
3710 /* Like build_cp_library_fn, but also pushes the function so that it
3711 will be found by normal lookup. */
3714 push_cp_library_fn (enum tree_code operator_code, tree type)
3716 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3723 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3727 push_void_library_fn (tree name, tree parmtypes)
3729 tree type = build_function_type (void_type_node, parmtypes);
3730 return push_library_fn (name, type, NULL_TREE);
3733 /* Like push_library_fn, but also note that this function throws
3734 and does not return. Used for __throw_foo and the like. */
3737 push_throw_library_fn (tree name, tree type)
3739 tree fn = push_library_fn (name, type, NULL_TREE);
3740 TREE_THIS_VOLATILE (fn) = 1;
3741 TREE_NOTHROW (fn) = 0;
3745 /* When we call finish_struct for an anonymous union, we create
3746 default copy constructors and such. But, an anonymous union
3747 shouldn't have such things; this function undoes the damage to the
3748 anonymous union type T.
3750 (The reason that we create the synthesized methods is that we don't
3751 distinguish `union { int i; }' from `typedef union { int i; } U'.
3752 The first is an anonymous union; the second is just an ordinary
3756 fixup_anonymous_aggr (tree t)
3760 /* Wipe out memory of synthesized methods. */
3761 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3762 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3763 TYPE_HAS_INIT_REF (t) = 0;
3764 TYPE_HAS_CONST_INIT_REF (t) = 0;
3765 TYPE_HAS_ASSIGN_REF (t) = 0;
3766 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3768 /* Splice the implicitly generated functions out of the TYPE_METHODS
3770 q = &TYPE_METHODS (t);
3773 if (DECL_ARTIFICIAL (*q))
3774 *q = TREE_CHAIN (*q);
3776 q = &TREE_CHAIN (*q);
3779 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3780 if (TYPE_METHODS (t))
3782 tree decl = TYPE_MAIN_DECL (t);
3784 if (TREE_CODE (t) != UNION_TYPE)
3785 error ("%Jan anonymous struct cannot have function members", decl);
3787 error ("%Jan anonymous union cannot have function members", decl);
3790 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3791 assignment operators (because they cannot have these methods themselves).
3792 For anonymous unions this is already checked because they are not allowed
3793 in any union, otherwise we have to check it. */
3794 if (TREE_CODE (t) != UNION_TYPE)
3798 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3799 if (TREE_CODE (field) == FIELD_DECL)
3801 type = TREE_TYPE (field);
3802 if (CLASS_TYPE_P (type))
3804 if (TYPE_NEEDS_CONSTRUCTING (type))
3805 error ("member %q+#D with constructor not allowed "
3806 "in anonymous aggregate", field);
3807 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3808 error ("member %q+#D with destructor not allowed "
3809 "in anonymous aggregate", field);
3810 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3811 error ("member %q+#D with copy assignment operator "
3812 "not allowed in anonymous aggregate", field);
3818 /* Make sure that a declaration with no declarator is well-formed, i.e.
3819 just declares a tagged type or anonymous union.
3821 Returns the type declared; or NULL_TREE if none. */
3824 check_tag_decl (cp_decl_specifier_seq *declspecs)
3826 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3827 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3828 /* If a class, struct, or enum type is declared by the DECLSPECS
3829 (i.e, if a class-specifier, enum-specifier, or non-typename
3830 elaborated-type-specifier appears in the DECLSPECS),
3831 DECLARED_TYPE is set to the corresponding type. */
3832 tree declared_type = NULL_TREE;
3833 bool error_p = false;
3835 if (declspecs->multiple_types_p)
3836 error ("multiple types in one declaration");
3837 else if (declspecs->redefined_builtin_type)
3839 if (!in_system_header)
3840 permerror (input_location, "redeclaration of C++ built-in type %qT",
3841 declspecs->redefined_builtin_type);
3846 && TYPE_P (declspecs->type)
3847 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3848 && MAYBE_CLASS_TYPE_P (declspecs->type))
3849 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3850 declared_type = declspecs->type;
3851 else if (declspecs->type == error_mark_node)
3853 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3854 permerror (input_location, "declaration does not declare anything");
3855 /* Check for an anonymous union. */
3856 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3857 && TYPE_ANONYMOUS_P (declared_type))
3859 /* 7/3 In a simple-declaration, the optional init-declarator-list
3860 can be omitted only when declaring a class (clause 9) or
3861 enumeration (7.2), that is, when the decl-specifier-seq contains
3862 either a class-specifier, an elaborated-type-specifier with
3863 a class-key (9.1), or an enum-specifier. In these cases and
3864 whenever a class-specifier or enum-specifier is present in the
3865 decl-specifier-seq, the identifiers in these specifiers are among
3866 the names being declared by the declaration (as class-name,
3867 enum-names, or enumerators, depending on the syntax). In such
3868 cases, and except for the declaration of an unnamed bit-field (9.6),
3869 the decl-specifier-seq shall introduce one or more names into the
3870 program, or shall redeclare a name introduced by a previous
3871 declaration. [Example:
3872 enum { }; // ill-formed
3873 typedef class { }; // ill-formed
3877 error ("missing type-name in typedef-declaration");
3880 /* Anonymous unions are objects, so they can have specifiers. */;
3881 SET_ANON_AGGR_TYPE_P (declared_type);
3883 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3884 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3889 if (declspecs->specs[(int)ds_inline]
3890 || declspecs->specs[(int)ds_virtual])
3891 error ("%qs can only be specified for functions",
3892 declspecs->specs[(int)ds_inline]
3893 ? "inline" : "virtual");
3895 && (!current_class_type
3896 || current_scope () != current_class_type))
3897 error ("%<friend%> can only be specified inside a class");
3898 else if (declspecs->specs[(int)ds_explicit])
3899 error ("%<explicit%> can only be specified for constructors");
3900 else if (declspecs->storage_class)
3901 error ("a storage class can only be specified for objects "
3903 else if (declspecs->specs[(int)ds_const]
3904 || declspecs->specs[(int)ds_volatile]
3905 || declspecs->specs[(int)ds_restrict]
3906 || declspecs->specs[(int)ds_thread])
3907 error ("qualifiers can only be specified for objects "
3909 else if (saw_typedef)
3910 warning (0, "%<typedef%> was ignored in this declaration");
3913 return declared_type;
3916 /* Called when a declaration is seen that contains no names to declare.
3917 If its type is a reference to a structure, union or enum inherited
3918 from a containing scope, shadow that tag name for the current scope
3919 with a forward reference.
3920 If its type defines a new named structure or union
3921 or defines an enum, it is valid but we need not do anything here.
3922 Otherwise, it is an error.
3924 C++: may have to grok the declspecs to learn about static,
3925 complain for anonymous unions.
3927 Returns the TYPE declared -- or NULL_TREE if none. */
3930 shadow_tag (cp_decl_specifier_seq *declspecs)
3932 tree t = check_tag_decl (declspecs);
3937 if (declspecs->attributes)
3939 warning (0, "attribute ignored in declaration of %q+#T", t);
3940 warning (0, "attribute for %q+#T must follow the %qs keyword",
3941 t, class_key_or_enum_as_string (t));
3945 if (maybe_process_partial_specialization (t) == error_mark_node)
3948 /* This is where the variables in an anonymous union are
3949 declared. An anonymous union declaration looks like:
3951 because there is no declarator after the union, the parser
3952 sends that declaration here. */
3953 if (ANON_AGGR_TYPE_P (t))
3955 fixup_anonymous_aggr (t);
3957 if (TYPE_FIELDS (t))
3959 tree decl = grokdeclarator (/*declarator=*/NULL,
3960 declspecs, NORMAL, 0, NULL);
3961 finish_anon_union (decl);
3968 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3971 groktypename (cp_decl_specifier_seq *type_specifiers,
3972 const cp_declarator *declarator,
3973 bool is_template_arg)
3977 enum decl_context context
3978 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3979 attrs = type_specifiers->attributes;
3980 type_specifiers->attributes = NULL_TREE;
3981 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3982 if (attrs && type != error_mark_node)
3984 if (CLASS_TYPE_P (type))
3985 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3986 "outside of definition", type);
3987 else if (MAYBE_CLASS_TYPE_P (type))
3988 /* A template type parameter or other dependent type. */
3989 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
3990 "type %qT without an associated declaration", type);
3992 cplus_decl_attributes (&type, attrs, 0);
3997 /* Process a DECLARATOR for a function-scope variable declaration,
3998 namespace-scope variable declaration, or function declaration.
3999 (Function definitions go through start_function; class member
4000 declarations appearing in the body of the class go through
4001 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4002 If an error occurs, the error_mark_node is returned instead.
4004 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4005 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4006 for an explicitly defaulted function, or SD_DELETED for an explicitly
4007 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4008 implicitly initialized via a default constructor. ATTRIBUTES and
4009 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4010 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4011 set, the caller is responsible for calling pop_scope. */
4014 start_decl (const cp_declarator *declarator,
4015 cp_decl_specifier_seq *declspecs,
4018 tree prefix_attributes,
4019 tree *pushed_scope_p)
4027 *pushed_scope_p = NULL_TREE;
4029 /* An object declared as __attribute__((deprecated)) suppresses
4030 warnings of uses of other deprecated items. */
4031 if (lookup_attribute ("deprecated", attributes))
4032 deprecated_state = DEPRECATED_SUPPRESS;
4034 attributes = chainon (attributes, prefix_attributes);
4036 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4039 deprecated_state = DEPRECATED_NORMAL;
4041 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4042 || decl == error_mark_node)
4043 return error_mark_node;
4045 type = TREE_TYPE (decl);
4047 context = DECL_CONTEXT (decl);
4051 *pushed_scope_p = push_scope (context);
4053 /* We are only interested in class contexts, later. */
4054 if (TREE_CODE (context) == NAMESPACE_DECL)
4055 context = NULL_TREE;
4059 /* Is it valid for this decl to have an initializer at all?
4060 If not, set INITIALIZED to zero, which will indirectly
4061 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4062 switch (TREE_CODE (decl))
4065 error ("typedef %qD is initialized (use decltype instead)", decl);
4066 return error_mark_node;
4069 if (initialized == SD_DELETED)
4070 /* We'll handle the rest of the semantics later, but we need to
4071 set this now so it's visible to duplicate_decls. */
4072 DECL_DELETED_FN (decl) = 1;
4081 if (! toplevel_bindings_p ()
4082 && DECL_EXTERNAL (decl))
4083 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4085 DECL_EXTERNAL (decl) = 0;
4086 if (toplevel_bindings_p ())
4087 TREE_STATIC (decl) = 1;
4090 /* If this is a typedef that names the class for linkage purposes
4091 (7.1.3p8), apply any attributes directly to the type. */
4092 if (TREE_CODE (decl) == TYPE_DECL
4093 && TAGGED_TYPE_P (TREE_TYPE (decl))
4094 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4095 flags = ATTR_FLAG_TYPE_IN_PLACE;
4099 /* Set attributes here so if duplicate decl, will have proper attributes. */
4100 cplus_decl_attributes (&decl, attributes, flags);
4102 /* Dllimported symbols cannot be defined. Static data members (which
4103 can be initialized in-class and dllimported) go through grokfield,
4104 not here, so we don't need to exclude those decls when checking for
4106 if (initialized && DECL_DLLIMPORT_P (decl))
4108 error ("definition of %q#D is marked %<dllimport%>", decl);
4109 DECL_DLLIMPORT_P (decl) = 0;
4112 /* If #pragma weak was used, mark the decl weak now. */
4113 maybe_apply_pragma_weak (decl);
4115 if (TREE_CODE (decl) == FUNCTION_DECL
4116 && DECL_DECLARED_INLINE_P (decl)
4117 && DECL_UNINLINABLE (decl)
4118 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4119 warning (0, "inline function %q+D given attribute noinline", decl);
4121 if (context && COMPLETE_TYPE_P (complete_type (context)))
4123 if (TREE_CODE (decl) == VAR_DECL)
4125 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4126 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4127 error ("%q#D is not a static member of %q#T", decl, context);
4130 if (DECL_CONTEXT (field) != context)
4132 if (!same_type_p (DECL_CONTEXT (field), context))
4133 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4134 "to be defined as %<%T::%D%>",
4135 DECL_CONTEXT (field), DECL_NAME (decl),
4136 context, DECL_NAME (decl));
4137 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4139 if (processing_specialization
4140 && template_class_depth (context) == 0
4141 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4142 error ("template header not allowed in member definition "
4143 "of explicitly specialized class");
4144 /* Static data member are tricky; an in-class initialization
4145 still doesn't provide a definition, so the in-class
4146 declaration will have DECL_EXTERNAL set, but will have an
4147 initialization. Thus, duplicate_decls won't warn
4148 about this situation, and so we check here. */
4149 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4150 error ("duplicate initialization of %qD", decl);
4151 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4157 tree field = check_classfn (context, decl,
4158 (processing_template_decl
4159 > template_class_depth (context))
4160 ? current_template_parms
4162 if (field && field != error_mark_node
4163 && duplicate_decls (decl, field,
4164 /*newdecl_is_friend=*/false))
4168 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4169 DECL_IN_AGGR_P (decl) = 0;
4170 /* Do not mark DECL as an explicit specialization if it was not
4171 already marked as an instantiation; a declaration should
4172 never be marked as a specialization unless we know what
4173 template is being specialized. */
4174 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4176 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4178 /* [temp.expl.spec] An explicit specialization of a static data
4179 member of a template is a definition if the declaration
4180 includes an initializer; otherwise, it is a declaration.
4182 We check for processing_specialization so this only applies
4183 to the new specialization syntax. */
4184 if (!initialized && processing_specialization)
4185 DECL_EXTERNAL (decl) = 1;
4188 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4189 permerror (input_location, "declaration of %q#D outside of class is not definition",
4193 was_public = TREE_PUBLIC (decl);
4195 /* Enter this declaration into the symbol table. */
4196 decl = maybe_push_decl (decl);
4198 if (processing_template_decl)
4199 decl = push_template_decl (decl);
4200 if (decl == error_mark_node)
4201 return error_mark_node;
4203 /* Tell the back end to use or not use .common as appropriate. If we say
4204 -fconserve-space, we want this to save .data space, at the expense of
4205 wrong semantics. If we say -fno-conserve-space, we want this to
4206 produce errors about redefs; to do this we force variables into the
4208 if (flag_conserve_space
4209 && TREE_CODE (decl) == VAR_DECL
4210 && TREE_PUBLIC (decl)
4211 && !DECL_THREAD_LOCAL_P (decl)
4212 && !have_global_bss_p ())
4213 DECL_COMMON (decl) = 1;
4215 if (TREE_CODE (decl) == VAR_DECL
4216 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4217 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4219 /* This is a const variable with implicit 'static'. Set
4220 DECL_THIS_STATIC so we can tell it from variables that are
4221 !TREE_PUBLIC because of the anonymous namespace. */
4222 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4223 DECL_THIS_STATIC (decl) = 1;
4226 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4227 start_decl_1 (decl, initialized);
4232 /* Process the declaration of a variable DECL. INITIALIZED is true
4233 iff DECL is explicitly initialized. (INITIALIZED is false if the
4234 variable is initialized via an implicitly-called constructor.)
4235 This function must be called for ordinary variables (including, for
4236 example, implicit instantiations of templates), but must not be
4237 called for template declarations. */
4240 start_decl_1 (tree decl, bool initialized)
4244 bool aggregate_definition_p;
4246 gcc_assert (!processing_template_decl);
4248 if (error_operand_p (decl))
4251 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4253 type = TREE_TYPE (decl);
4254 complete_p = COMPLETE_TYPE_P (type);
4255 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4257 /* If an explicit initializer is present, or if this is a definition
4258 of an aggregate, then we need a complete type at this point.
4259 (Scalars are always complete types, so there is nothing to
4260 check.) This code just sets COMPLETE_P; errors (if necessary)
4261 are issued below. */
4262 if ((initialized || aggregate_definition_p)
4264 && COMPLETE_TYPE_P (complete_type (type)))
4267 /* We will not yet have set TREE_READONLY on DECL if the type
4268 was "const", but incomplete, before this point. But, now, we
4269 have a complete type, so we can try again. */
4270 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4274 /* Is it valid for this decl to have an initializer at all? */
4276 /* Don't allow initializations for incomplete types except for
4277 arrays which might be completed by the initialization. */
4279 ; /* A complete type is ok. */
4280 else if (type_uses_auto (type))
4281 ; /* An auto type is ok. */
4282 else if (TREE_CODE (type) != ARRAY_TYPE)
4284 error ("variable %q#D has initializer but incomplete type", decl);
4285 type = TREE_TYPE (decl) = error_mark_node;
4287 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4289 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4290 error ("elements of array %q#D have incomplete type", decl);
4291 /* else we already gave an error in start_decl. */
4294 else if (aggregate_definition_p && !complete_p)
4296 if (type_uses_auto (type))
4297 error ("declaration of %q#D has no initializer", decl);
4299 error ("aggregate %q#D has incomplete type and cannot be defined",
4301 /* Change the type so that assemble_variable will give
4302 DECL an rtl we can live with: (mem (const_int 0)). */
4303 type = TREE_TYPE (decl) = error_mark_node;
4306 /* Create a new scope to hold this declaration if necessary.
4307 Whether or not a new scope is necessary cannot be determined
4308 until after the type has been completed; if the type is a
4309 specialization of a class template it is not until after
4310 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4311 will be set correctly. */
4312 maybe_push_cleanup_level (type);
4315 /* Handle initialization of references. DECL, TYPE, and INIT have the
4316 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4317 but will be set to a new CLEANUP_STMT if a temporary is created
4318 that must be destroyed subsequently.
4320 Returns an initializer expression to use to initialize DECL, or
4321 NULL if the initialization can be performed statically.
4323 Quotes on semantics can be found in ARM 8.4.3. */
4326 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4330 if (init == NULL_TREE)
4332 if ((DECL_LANG_SPECIFIC (decl) == 0
4333 || DECL_IN_AGGR_P (decl) == 0)
4334 && ! DECL_THIS_EXTERN (decl))
4335 error ("%qD declared as reference but not initialized", decl);
4339 if (TREE_CODE (init) == CONSTRUCTOR)
4341 error ("ISO C++ forbids use of initializer list to "
4342 "initialize reference %qD", decl);
4346 if (TREE_CODE (init) == TREE_LIST)
4347 init = build_x_compound_expr_from_list (init, "initializer");
4349 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4350 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4351 /* Note: default conversion is only called in very special cases. */
4352 init = decay_conversion (init);
4354 /* Convert INIT to the reference type TYPE. This may involve the
4355 creation of a temporary, whose lifetime must be the same as that
4356 of the reference. If so, a DECL_EXPR for the temporary will be
4357 added just after the DECL_EXPR for DECL. That's why we don't set
4358 DECL_INITIAL for local references (instead assigning to them
4359 explicitly); we need to allow the temporary to be initialized
4361 tmp = initialize_reference (type, init, decl, cleanup);
4363 if (tmp == error_mark_node)
4365 else if (tmp == NULL_TREE)
4367 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4371 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4374 DECL_INITIAL (decl) = tmp;
4379 /* Subroutine of check_initializer. We're initializing a DECL of
4380 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4381 extend the lifetime of the underlying array to match that of the decl,
4382 just like for reference initialization. CLEANUP is as for
4383 grok_reference_init. */
4386 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4388 tree aggr_init, array, arrtype;
4389 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4390 aggr_init = TARGET_EXPR_INITIAL (init);
4391 init = build2 (INIT_EXPR, type, decl, init);
4393 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4394 arrtype = TREE_TYPE (array);
4396 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4397 array = TREE_OPERAND (array, 0);
4398 /* If the array is constant, finish_compound_literal already made it a
4399 static variable and we don't need to do anything here. */
4400 if (decl && TREE_CODE (array) == TARGET_EXPR)
4403 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4404 var = build_address (var);
4405 var = convert (arrtype, var);
4406 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4407 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4412 /* Designated initializers in arrays are not supported in GNU C++.
4413 The parser cannot detect this error since it does not know whether
4414 a given brace-enclosed initializer is for a class type or for an
4415 array. This function checks that CE does not use a designated
4416 initializer. If it does, an error is issued. Returns true if CE
4417 is valid, i.e., does not have a designated initializer. */
4420 check_array_designated_initializer (const constructor_elt *ce)
4422 /* Designated initializers for array elements are not supported. */
4425 /* The parser only allows identifiers as designated
4427 if (ce->index == error_mark_node)
4428 error ("name used in a GNU-style designated "
4429 "initializer for an array");
4432 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4433 error ("name %qD used in a GNU-style designated "
4434 "initializer for an array", ce->index);
4442 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4443 array until we finish parsing the initializer. If that's the
4444 situation we're in, update DECL accordingly. */
4447 maybe_deduce_size_from_array_init (tree decl, tree init)
4449 tree type = TREE_TYPE (decl);
4451 if (TREE_CODE (type) == ARRAY_TYPE
4452 && TYPE_DOMAIN (type) == NULL_TREE
4453 && TREE_CODE (decl) != TYPE_DECL)
4455 /* do_default is really a C-ism to deal with tentative definitions.
4456 But let's leave it here to ease the eventual merge. */
4457 int do_default = !DECL_EXTERNAL (decl);
4458 tree initializer = init ? init : DECL_INITIAL (decl);
4461 /* Check that there are no designated initializers in INIT, as
4462 those are not supported in GNU C++, and as the middle-end
4463 will crash if presented with a non-numeric designated
4465 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4467 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4468 constructor_elt *ce;
4471 VEC_iterate (constructor_elt, v, i, ce);
4473 if (!check_array_designated_initializer (ce))
4479 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4483 error ("initializer fails to determine size of %qD", decl);
4484 TREE_TYPE (decl) = error_mark_node;
4486 else if (failure == 2)
4490 error ("array size missing in %qD", decl);
4491 TREE_TYPE (decl) = error_mark_node;
4493 /* If a `static' var's size isn't known, make it extern as
4494 well as static, so it does not get allocated. If it's not
4495 `static', then don't mark it extern; finish_incomplete_decl
4496 will give it a default size and it will get allocated. */
4497 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4498 DECL_EXTERNAL (decl) = 1;
4500 else if (failure == 3)
4502 error ("zero-size array %qD", decl);
4503 TREE_TYPE (decl) = error_mark_node;
4507 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4509 relayout_decl (decl);
4513 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4514 any appropriate error messages regarding the layout. */
4517 layout_var_decl (tree decl)
4521 type = TREE_TYPE (decl);
4522 if (type == error_mark_node)
4525 /* If we haven't already layed out this declaration, do so now.
4526 Note that we must not call complete type for an external object
4527 because it's type might involve templates that we are not
4528 supposed to instantiate yet. (And it's perfectly valid to say
4529 `extern X x' for some incomplete type `X'.) */
4530 if (!DECL_EXTERNAL (decl))
4531 complete_type (type);
4532 if (!DECL_SIZE (decl)
4533 && TREE_TYPE (decl) != error_mark_node
4534 && (COMPLETE_TYPE_P (type)
4535 || (TREE_CODE (type) == ARRAY_TYPE
4536 && !TYPE_DOMAIN (type)
4537 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4538 layout_decl (decl, 0);
4540 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4542 /* An automatic variable with an incomplete type: that is an error.
4543 Don't talk about array types here, since we took care of that
4544 message in grokdeclarator. */
4545 error ("storage size of %qD isn't known", decl);
4546 TREE_TYPE (decl) = error_mark_node;
4549 /* Keep this code around in case we later want to control debug info
4550 based on whether a type is "used". (jason 1999-11-11) */
4552 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4553 /* Let debugger know it should output info for this type. */
4554 note_debug_info_needed (ttype);
4556 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4557 note_debug_info_needed (DECL_CONTEXT (decl));
4560 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4561 && DECL_SIZE (decl) != NULL_TREE
4562 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4564 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4565 constant_expression_warning (DECL_SIZE (decl));
4568 error ("storage size of %qD isn't constant", decl);
4569 TREE_TYPE (decl) = error_mark_node;
4574 /* If a local static variable is declared in an inline function, or if
4575 we have a weak definition, we must endeavor to create only one
4576 instance of the variable at link-time. */
4579 maybe_commonize_var (tree decl)
4581 /* Static data in a function with comdat linkage also has comdat
4583 if (TREE_STATIC (decl)
4584 /* Don't mess with __FUNCTION__. */
4585 && ! DECL_ARTIFICIAL (decl)
4586 && DECL_FUNCTION_SCOPE_P (decl)
4587 /* Unfortunately, import_export_decl has not always been called
4588 before the function is processed, so we cannot simply check
4590 && (DECL_COMDAT (DECL_CONTEXT (decl))
4591 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4592 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4593 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4597 /* With weak symbols, we simply make the variable COMDAT;
4598 that will cause copies in multiple translations units to
4600 comdat_linkage (decl);
4604 if (DECL_INITIAL (decl) == NULL_TREE
4605 || DECL_INITIAL (decl) == error_mark_node)
4607 /* Without weak symbols, we can use COMMON to merge
4608 uninitialized variables. */
4609 TREE_PUBLIC (decl) = 1;
4610 DECL_COMMON (decl) = 1;
4614 /* While for initialized variables, we must use internal
4615 linkage -- which means that multiple copies will not
4617 TREE_PUBLIC (decl) = 0;
4618 DECL_COMMON (decl) = 0;
4619 warning (0, "sorry: semantics of inline function static "
4620 "data %q+#D are wrong (you'll wind up "
4621 "with multiple copies)", decl);
4622 warning (0, "%J you can work around this by removing "
4628 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4629 /* Set it up again; we might have set DECL_INITIAL since the last
4631 comdat_linkage (decl);
4634 /* Issue an error message if DECL is an uninitialized const variable. */
4637 check_for_uninitialized_const_var (tree decl)
4639 tree type = TREE_TYPE (decl);
4641 /* ``Unless explicitly declared extern, a const object does not have
4642 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4644 if (TREE_CODE (decl) == VAR_DECL
4645 && TREE_CODE (type) != REFERENCE_TYPE
4646 && CP_TYPE_CONST_P (type)
4647 && !TYPE_NEEDS_CONSTRUCTING (type)
4648 && !DECL_INITIAL (decl))
4649 error ("uninitialized const %qD", decl);
4653 /* Structure holding the current initializer being processed by reshape_init.
4654 CUR is a pointer to the current element being processed, END is a pointer
4655 after the last element present in the initializer. */
4656 typedef struct reshape_iterator_t
4658 constructor_elt *cur;
4659 constructor_elt *end;
4662 static tree reshape_init_r (tree, reshape_iter *, bool);
4664 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4665 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4666 initialized. If there are no more such fields, the return value
4670 next_initializable_field (tree field)
4673 && (TREE_CODE (field) != FIELD_DECL
4674 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4675 || DECL_ARTIFICIAL (field)))
4676 field = TREE_CHAIN (field);
4681 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4682 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4683 INTEGER_CST representing the size of the array minus one (the maximum index),
4684 or NULL_TREE if the array was declared without specifying the size. D is
4685 the iterator within the constructor. */
4688 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4691 bool sized_array_p = (max_index != NULL_TREE);
4692 unsigned HOST_WIDE_INT max_index_cst = 0;
4693 unsigned HOST_WIDE_INT index;
4695 /* The initializer for an array is always a CONSTRUCTOR. */
4696 new_init = build_constructor (init_list_type_node, NULL);
4700 /* Minus 1 is used for zero sized arrays. */
4701 if (integer_all_onesp (max_index))
4704 if (host_integerp (max_index, 1))
4705 max_index_cst = tree_low_cst (max_index, 1);
4706 /* sizetype is sign extended, not zero extended. */
4708 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4712 /* Loop until there are no more initializers. */
4714 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4719 check_array_designated_initializer (d->cur);
4720 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4721 if (elt_init == error_mark_node)
4722 return error_mark_node;
4723 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4729 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4730 Parameters are the same of reshape_init_r. */
4733 reshape_init_array (tree type, reshape_iter *d)
4735 tree max_index = NULL_TREE;
4737 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4739 if (TYPE_DOMAIN (type))
4740 max_index = array_type_nelts (type);
4742 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4745 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4746 Parameters are the same of reshape_init_r. */
4749 reshape_init_vector (tree type, reshape_iter *d)
4751 tree max_index = NULL_TREE;
4754 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4756 if (COMPOUND_LITERAL_P (d->cur->value))
4758 tree value = d->cur->value;
4759 if (!same_type_p (TREE_TYPE (value), type))
4761 error ("invalid type %qT as initializer for a vector of type %qT",
4762 TREE_TYPE (d->cur->value), type);
4763 value = error_mark_node;
4769 /* For a vector, the representation type is a struct
4770 containing a single member which is an array of the
4771 appropriate size. */
4772 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4773 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4774 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4776 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4779 /* Subroutine of reshape_init_r, processes the initializers for classes
4780 or union. Parameters are the same of reshape_init_r. */
4783 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4788 gcc_assert (CLASS_TYPE_P (type));
4790 /* The initializer for a class is always a CONSTRUCTOR. */
4791 new_init = build_constructor (init_list_type_node, NULL);
4792 field = next_initializable_field (TYPE_FIELDS (type));
4798 An initializer for an aggregate member that is an
4799 empty class shall have the form of an empty
4800 initializer-list {}. */
4801 if (!first_initializer_p)
4803 error ("initializer for %qT must be brace-enclosed", type);
4804 return error_mark_node;
4809 /* Loop through the initializable fields, gathering initializers. */
4810 while (d->cur != d->end)
4814 /* Handle designated initializers, as an extension. */
4817 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4819 if (!field || TREE_CODE (field) != FIELD_DECL)
4821 error ("%qT has no non-static data member named %qD", type,
4823 return error_mark_node;
4827 /* If we processed all the member of the class, we are done. */
4831 field_init = reshape_init_r (TREE_TYPE (field), d,
4832 /*first_initializer_p=*/false);
4833 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4837 When a union is initialized with a brace-enclosed
4838 initializer, the braces shall only contain an
4839 initializer for the first member of the union. */
4840 if (TREE_CODE (type) == UNION_TYPE)
4843 field = next_initializable_field (TREE_CHAIN (field));
4849 /* Subroutine of reshape_init, which processes a single initializer (part of
4850 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4851 iterator within the CONSTRUCTOR which points to the initializer to process.
4852 FIRST_INITIALIZER_P is true if this is the first initializer of the
4853 CONSTRUCTOR node. */
4856 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4858 tree init = d->cur->value;
4860 if (error_operand_p (init))
4861 return error_mark_node;
4863 /* A non-aggregate type is always initialized with a single
4865 if (!CP_AGGREGATE_TYPE_P (type))
4867 /* It is invalid to initialize a non-aggregate type with a
4868 brace-enclosed initializer before C++0x.
4869 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4870 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4871 a CONSTRUCTOR (with a record type). */
4872 if (TREE_CODE (init) == CONSTRUCTOR
4873 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4875 if (SCALAR_TYPE_P (type))
4877 error ("braces around scalar initializer for type %qT", type);
4878 init = error_mark_node;
4881 maybe_warn_cpp0x ("extended initializer lists");
4890 All implicit type conversions (clause _conv_) are considered when
4891 initializing the aggregate member with an initializer from an
4892 initializer-list. If the initializer can initialize a member,
4893 the member is initialized. Otherwise, if the member is itself a
4894 non-empty subaggregate, brace elision is assumed and the
4895 initializer is considered for the initialization of the first
4896 member of the subaggregate. */
4897 if (TREE_CODE (init) != CONSTRUCTOR
4898 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4904 /* [dcl.init.string]
4906 A char array (whether plain char, signed char, or unsigned char)
4907 can be initialized by a string-literal (optionally enclosed in
4908 braces); a wchar_t array can be initialized by a wide
4909 string-literal (optionally enclosed in braces). */
4910 if (TREE_CODE (type) == ARRAY_TYPE
4911 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4913 tree str_init = init;
4915 /* Strip one level of braces if and only if they enclose a single
4916 element (as allowed by [dcl.init.string]). */
4917 if (!first_initializer_p
4918 && TREE_CODE (str_init) == CONSTRUCTOR
4919 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4921 str_init = VEC_index (constructor_elt,
4922 CONSTRUCTOR_ELTS (str_init), 0)->value;
4925 /* If it's a string literal, then it's the initializer for the array
4926 as a whole. Otherwise, continue with normal initialization for
4927 array types (one value per array element). */
4928 if (TREE_CODE (str_init) == STRING_CST)
4935 /* The following cases are about aggregates. If we are not within a full
4936 initializer already, and there is not a CONSTRUCTOR, it means that there
4937 is a missing set of braces (that is, we are processing the case for
4938 which reshape_init exists). */
4939 if (!first_initializer_p)
4941 if (TREE_CODE (init) == CONSTRUCTOR)
4943 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4944 /* There is no need to reshape pointer-to-member function
4945 initializers, as they are always constructed correctly
4946 by the front end. */
4948 else if (COMPOUND_LITERAL_P (init))
4949 /* For a nested compound literal, there is no need to reshape since
4950 brace elision is not allowed. Even if we decided to allow it,
4951 we should add a call to reshape_init in finish_compound_literal,
4952 before calling digest_init, so changing this code would still
4953 not be necessary. */
4954 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4958 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4959 return reshape_init (type, init);
4963 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4967 /* Dispatch to specialized routines. */
4968 if (CLASS_TYPE_P (type))
4969 return reshape_init_class (type, d, first_initializer_p);
4970 else if (TREE_CODE (type) == ARRAY_TYPE)
4971 return reshape_init_array (type, d);
4972 else if (TREE_CODE (type) == VECTOR_TYPE)
4973 return reshape_init_vector (type, d);
4978 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4979 brace-enclosed aggregate initializer.
4981 INIT is the CONSTRUCTOR containing the list of initializers describing
4982 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4983 It may not presently match the shape of the TYPE; for example:
4985 struct S { int a; int b; };
4986 struct S a[] = { 1, 2, 3, 4 };
4988 Here INIT will hold a VEC of four elements, rather than a
4989 VEC of two elements, each itself a VEC of two elements. This
4990 routine transforms INIT from the former form into the latter. The
4991 revised CONSTRUCTOR node is returned. */
4994 reshape_init (tree type, tree init)
4996 VEC(constructor_elt, gc) *v;
5000 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5002 v = CONSTRUCTOR_ELTS (init);
5004 /* An empty constructor does not need reshaping, and it is always a valid
5006 if (VEC_empty (constructor_elt, v))
5009 /* Recurse on this CONSTRUCTOR. */
5010 d.cur = VEC_index (constructor_elt, v, 0);
5011 d.end = d.cur + VEC_length (constructor_elt, v);
5013 new_init = reshape_init_r (type, &d, true);
5014 if (new_init == error_mark_node)
5015 return error_mark_node;
5017 /* Make sure all the element of the constructor were used. Otherwise,
5018 issue an error about exceeding initializers. */
5020 error ("too many initializers for %qT", type);
5025 /* Verify array initializer. Returns true if errors have been reported. */
5028 check_array_initializer (tree decl, tree type, tree init)
5030 tree element_type = TREE_TYPE (type);
5032 /* The array type itself need not be complete, because the
5033 initializer may tell us how many elements are in the array.
5034 But, the elements of the array must be complete. */
5035 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5038 error ("elements of array %q#D have incomplete type", decl);
5040 error ("elements of array %q#T have incomplete type", type);
5043 /* It is not valid to initialize a VLA. */
5045 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5046 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5049 error ("variable-sized object %qD may not be initialized", decl);
5051 error ("variable-sized compound literal");
5057 /* Subroutine of check_initializer; args are passed down from that function.
5058 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5061 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5064 int saved_stmts_are_full_exprs_p = 0;
5065 if (building_stmt_tree ())
5067 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5068 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5070 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5071 if (building_stmt_tree ())
5072 current_stmt_tree ()->stmts_are_full_exprs_p =
5073 saved_stmts_are_full_exprs_p;
5077 /* Verify INIT (the initializer for DECL), and record the
5078 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5079 grok_reference_init.
5081 If the return value is non-NULL, it is an expression that must be
5082 evaluated dynamically to initialize DECL. */
5085 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5087 tree type = TREE_TYPE (decl);
5088 tree init_code = NULL;
5090 /* Things that are going to be initialized need to have complete
5092 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5094 if (type == error_mark_node)
5095 /* We will have already complained. */
5098 if (TREE_CODE (type) == ARRAY_TYPE)
5100 if (check_array_initializer (decl, type, init))
5103 else if (!COMPLETE_TYPE_P (type))
5105 error ("%qD has incomplete type", decl);
5106 TREE_TYPE (decl) = error_mark_node;
5110 /* There is no way to make a variable-sized class type in GNU C++. */
5111 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5113 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5115 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5116 if (SCALAR_TYPE_P (type))
5120 maybe_warn_cpp0x ("extended initializer lists");
5121 init = build_zero_init (type, NULL_TREE, false);
5123 else if (init_len != 1)
5125 error ("scalar object %qD requires one element in initializer",
5127 TREE_TYPE (decl) = error_mark_node;
5133 if (TREE_CODE (decl) == CONST_DECL)
5135 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5137 DECL_INITIAL (decl) = init;
5139 gcc_assert (init != NULL_TREE);
5142 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5143 init = grok_reference_init (decl, type, init, cleanup);
5146 /* Do not reshape constructors of vectors (they don't need to be
5148 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5150 if (is_std_init_list (type))
5151 return build_init_list_var_init (decl, type, init, cleanup);
5152 else if (TYPE_NON_AGGREGATE_CLASS (type))
5154 /* Don't reshape if the class has constructors. */
5155 if (cxx_dialect == cxx98)
5156 error ("in C++98 %qD must be initialized by constructor, "
5159 init = build_tree_list (NULL_TREE, init);
5161 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5163 error ("opaque vector types cannot be initialized");
5164 init = error_mark_node;
5167 init = reshape_init (type, init);
5170 /* If DECL has an array type without a specific bound, deduce the
5171 array size from the initializer. */
5172 maybe_deduce_size_from_array_init (decl, init);
5173 type = TREE_TYPE (decl);
5174 if (type == error_mark_node)
5177 if (TYPE_NEEDS_CONSTRUCTING (type)
5178 || (CLASS_TYPE_P (type)
5179 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5180 return build_aggr_init_full_exprs (decl, init, flags);
5181 else if (TREE_CODE (init) != TREE_VEC)
5183 init_code = store_init_value (decl, init, flags);
5184 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5185 && DECL_INITIAL (decl)
5186 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5187 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5188 warning (0, "array %qD initialized by parenthesized string literal %qE",
5189 decl, DECL_INITIAL (decl));
5193 else if (DECL_EXTERNAL (decl))
5195 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5196 return build_aggr_init_full_exprs (decl, init, flags);
5197 else if (MAYBE_CLASS_TYPE_P (type))
5199 tree core_type = strip_array_types (type);
5201 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5202 error ("structure %qD with uninitialized const members", decl);
5203 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5204 error ("structure %qD with uninitialized reference members", decl);
5206 check_for_uninitialized_const_var (decl);
5209 check_for_uninitialized_const_var (decl);
5211 if (init && init != error_mark_node)
5212 init_code = build2 (INIT_EXPR, type, decl, init);
5217 /* If DECL is not a local variable, give it RTL. */
5220 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5222 int toplev = toplevel_bindings_p ();
5224 const char *filename;
5226 /* Set the DECL_ASSEMBLER_NAME for the object. */
5229 /* The `register' keyword, when used together with an
5230 asm-specification, indicates that the variable should be
5231 placed in a particular register. */
5232 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5234 set_user_assembler_name (decl, asmspec);
5235 DECL_HARD_REGISTER (decl) = 1;
5239 if (TREE_CODE (decl) == FUNCTION_DECL
5240 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5241 set_builtin_user_assembler_name (decl, asmspec);
5242 set_user_assembler_name (decl, asmspec);
5246 /* Handle non-variables up front. */
5247 if (TREE_CODE (decl) != VAR_DECL)
5249 rest_of_decl_compilation (decl, toplev, at_eof);
5253 /* If we see a class member here, it should be a static data
5255 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5257 gcc_assert (TREE_STATIC (decl));
5258 /* An in-class declaration of a static data member should be
5259 external; it is only a declaration, and not a definition. */
5260 if (init == NULL_TREE)
5261 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5264 /* We don't create any RTL for local variables. */
5265 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5268 /* We defer emission of local statics until the corresponding
5269 DECL_EXPR is expanded. */
5270 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5272 /* We try to defer namespace-scope static constants so that they are
5273 not emitted into the object file unnecessarily. */
5274 filename = input_filename;
5275 if (!DECL_VIRTUAL_P (decl)
5276 && TREE_READONLY (decl)
5277 && DECL_INITIAL (decl) != NULL_TREE
5278 && DECL_INITIAL (decl) != error_mark_node
5280 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5282 && !TREE_PUBLIC (decl))
5284 /* Fool with the linkage of static consts according to #pragma
5286 struct c_fileinfo *finfo = get_fileinfo (filename);
5287 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5289 TREE_PUBLIC (decl) = 1;
5290 DECL_EXTERNAL (decl) = finfo->interface_only;
5295 /* Likewise for template instantiations. */
5296 else if (DECL_LANG_SPECIFIC (decl)
5297 && DECL_IMPLICIT_INSTANTIATION (decl))
5300 /* If we're not deferring, go ahead and assemble the variable. */
5302 rest_of_decl_compilation (decl, toplev, at_eof);
5305 /* walk_tree helper for wrap_temporary_cleanups, below. */
5308 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5310 if (TYPE_P (*stmt_p))
5316 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5318 tree guard = (tree)data;
5319 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5321 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5322 /* Tell honor_protect_cleanup_actions to handle this as a separate
5324 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5326 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5332 /* We're initializing a local variable which has a cleanup GUARD. If there
5333 are any temporaries used in the initializer INIT of this variable, we
5334 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5335 variable will be cleaned up properly if one of them throws.
5337 Unfortunately, there's no way to express this properly in terms of
5338 nesting, as the regions for the temporaries overlap the region for the
5339 variable itself; if there are two temporaries, the variable needs to be
5340 the first thing destroyed if either of them throws. However, we only
5341 want to run the variable's cleanup if it actually got constructed. So
5342 we need to guard the temporary cleanups with the variable's cleanup if
5343 they are run on the normal path, but not if they are run on the
5344 exceptional path. We implement this by telling
5345 honor_protect_cleanup_actions to strip the variable cleanup from the
5346 exceptional path. */
5349 wrap_temporary_cleanups (tree init, tree guard)
5351 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5354 /* Generate code to initialize DECL (a local variable). */
5357 initialize_local_var (tree decl, tree init)
5359 tree type = TREE_TYPE (decl);
5363 gcc_assert (TREE_CODE (decl) == VAR_DECL
5364 || TREE_CODE (decl) == RESULT_DECL);
5365 gcc_assert (!TREE_STATIC (decl));
5367 if (DECL_SIZE (decl) == NULL_TREE)
5369 /* If we used it already as memory, it must stay in memory. */
5370 DECL_INITIAL (decl) = NULL_TREE;
5371 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5375 if (type == error_mark_node)
5378 /* Compute and store the initial value. */
5379 already_used = TREE_USED (decl) || TREE_USED (type);
5381 /* Generate a cleanup, if necessary. */
5382 cleanup = cxx_maybe_build_cleanup (decl);
5384 /* Perform the initialization. */
5387 int saved_stmts_are_full_exprs_p;
5389 /* If we're only initializing a single object, guard the destructors
5390 of any temporaries used in its initializer with its destructor.
5391 This isn't right for arrays because each element initialization is
5392 a full-expression. */
5393 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5394 wrap_temporary_cleanups (init, cleanup);
5396 gcc_assert (building_stmt_tree ());
5397 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5398 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5399 finish_expr_stmt (init);
5400 current_stmt_tree ()->stmts_are_full_exprs_p =
5401 saved_stmts_are_full_exprs_p;
5404 /* Set this to 0 so we can tell whether an aggregate which was
5405 initialized was ever used. Don't do this if it has a
5406 destructor, so we don't complain about the 'resource
5407 allocation is initialization' idiom. Now set
5408 attribute((unused)) on types so decls of that type will be
5409 marked used. (see TREE_USED, above.) */
5410 if (TYPE_NEEDS_CONSTRUCTING (type)
5412 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5413 && DECL_NAME (decl))
5414 TREE_USED (decl) = 0;
5415 else if (already_used)
5416 TREE_USED (decl) = 1;
5419 finish_decl_cleanup (decl, cleanup);
5422 /* DECL is a VAR_DECL for a compiler-generated variable with static
5423 storage duration (like a virtual table) whose initializer is a
5424 compile-time constant. INIT must be either a TREE_LIST of values,
5425 or a CONSTRUCTOR. Initialize the variable and provide it to the
5429 initialize_artificial_var (tree decl, tree init)
5431 gcc_assert (DECL_ARTIFICIAL (decl));
5432 if (TREE_CODE (init) == TREE_LIST)
5433 init = build_constructor_from_list (TREE_TYPE (decl), init);
5434 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5435 DECL_INITIAL (decl) = init;
5436 DECL_INITIALIZED_P (decl) = 1;
5437 determine_visibility (decl);
5438 layout_var_decl (decl);
5439 maybe_commonize_var (decl);
5440 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5443 /* INIT is the initializer for a variable, as represented by the
5444 parser. Returns true iff INIT is value-dependent. */
5447 value_dependent_init_p (tree init)
5449 if (TREE_CODE (init) == TREE_LIST)
5450 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5451 return any_value_dependent_elements_p (init);
5452 else if (TREE_CODE (init) == CONSTRUCTOR)
5453 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5455 VEC(constructor_elt, gc) *elts;
5459 elts = CONSTRUCTOR_ELTS (init);
5460 nelts = VEC_length (constructor_elt, elts);
5461 for (i = 0; i < nelts; ++i)
5462 if (value_dependent_init_p (VEC_index (constructor_elt,
5467 /* It must be a simple expression, e.g., int i = 3; */
5468 return value_dependent_expression_p (init);
5473 /* Finish processing of a declaration;
5474 install its line number and initial value.
5475 If the length of an array type is not known before,
5476 it must be determined now, from the initial value, or it is an error.
5478 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5479 true, then INIT is an integral constant expression.
5481 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5482 if the (init) syntax was used. */
5485 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5486 tree asmspec_tree, int flags)
5490 const char *asmspec = NULL;
5491 int was_readonly = 0;
5492 bool var_definition_p = false;
5493 int saved_processing_template_decl;
5496 if (decl == error_mark_node)
5501 error ("assignment (not initialization) in declaration");
5505 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5506 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5507 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5509 type = TREE_TYPE (decl);
5510 if (type == error_mark_node)
5513 /* Assume no cleanup is required. */
5514 cleanup = NULL_TREE;
5515 saved_processing_template_decl = processing_template_decl;
5517 /* If a name was specified, get the string. */
5518 if (global_scope_p (current_binding_level))
5519 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5520 if (asmspec_tree && asmspec_tree != error_mark_node)
5521 asmspec = TREE_STRING_POINTER (asmspec_tree);
5523 if (current_class_type
5524 && CP_DECL_CONTEXT (decl) == current_class_type
5525 && TYPE_BEING_DEFINED (current_class_type)
5526 && (DECL_INITIAL (decl) || init))
5527 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5529 auto_node = type_uses_auto (type);
5532 if (init == NULL_TREE)
5534 error ("declaration of %q#D has no initializer", decl);
5535 TREE_TYPE (decl) = error_mark_node;
5538 if (TREE_CODE (init) == TREE_LIST)
5539 init = build_x_compound_expr_from_list (init, "initializer");
5540 if (describable_type (init))
5542 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5543 if (type == error_mark_node)
5548 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5550 if (init == ridpointers[(int)RID_DELETE])
5552 /* FIXME check this is 1st decl. */
5553 DECL_DELETED_FN (decl) = 1;
5554 DECL_DECLARED_INLINE_P (decl) = 1;
5555 DECL_INITIAL (decl) = error_mark_node;
5558 else if (init == ridpointers[(int)RID_DEFAULT])
5560 if (!defaultable_fn_p (decl))
5562 error ("%qD cannot be defaulted", decl);
5563 DECL_INITIAL (decl) = NULL_TREE;
5566 DECL_DEFAULTED_FN (decl) = 1;
5570 if (processing_template_decl)
5572 bool type_dependent_p;
5574 /* Add this declaration to the statement-tree. */
5575 if (at_function_scope_p ())
5576 add_decl_expr (decl);
5578 type_dependent_p = dependent_type_p (type);
5580 if (check_for_bare_parameter_packs (init))
5583 DECL_INITIAL (decl) = NULL_TREE;
5586 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5588 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5589 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5590 TREE_CONSTANT (decl) = 1;
5593 /* Generally, initializers in templates are expanded when the
5594 template is instantiated. But, if DECL is an integral
5595 constant static data member, then it can be used in future
5596 integral constant expressions, and its value must be
5599 && DECL_CLASS_SCOPE_P (decl)
5600 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5601 && !type_dependent_p
5602 && !value_dependent_init_p (init)))
5605 DECL_INITIAL (decl) = init;
5606 if (TREE_CODE (decl) == VAR_DECL
5607 && !DECL_PRETTY_FUNCTION_P (decl)
5608 && !type_dependent_p)
5609 maybe_deduce_size_from_array_init (decl, init);
5613 if (TREE_CODE (init) == TREE_LIST)
5615 /* If the parenthesized-initializer form was used (e.g.,
5616 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5617 arguments. (There is generally only one.) We convert them
5620 for (; list; list = TREE_CHAIN (list))
5622 tree elt = TREE_VALUE (list);
5623 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5627 init = fold_non_dependent_expr (init);
5628 processing_template_decl = 0;
5631 /* Take care of TYPE_DECLs up front. */
5632 if (TREE_CODE (decl) == TYPE_DECL)
5634 if (type != error_mark_node
5635 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5637 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5638 warning (0, "shadowing previous type declaration of %q#D", decl);
5639 set_identifier_type_value (DECL_NAME (decl), decl);
5642 /* If we have installed this as the canonical typedef for this
5643 type, and that type has not been defined yet, delay emitting
5644 the debug information for it, as we will emit it later. */
5645 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5646 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5647 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5649 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5654 /* A reference will be modified here, as it is initialized. */
5655 if (! DECL_EXTERNAL (decl)
5656 && TREE_READONLY (decl)
5657 && TREE_CODE (type) == REFERENCE_TYPE)
5660 TREE_READONLY (decl) = 0;
5663 if (TREE_CODE (decl) == VAR_DECL)
5665 /* Only PODs can have thread-local storage. Other types may require
5666 various kinds of non-trivial initialization. */
5667 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5668 error ("%qD cannot be thread-local because it has non-POD type %qT",
5669 decl, TREE_TYPE (decl));
5670 /* If this is a local variable that will need a mangled name,
5671 register it now. We must do this before processing the
5672 initializer for the variable, since the initialization might
5673 require a guard variable, and since the mangled name of the
5674 guard variable will depend on the mangled name of this
5676 if (DECL_FUNCTION_SCOPE_P (decl)
5677 && TREE_STATIC (decl)
5678 && !DECL_ARTIFICIAL (decl))
5679 push_local_name (decl);
5680 /* Convert the initializer to the type of DECL, if we have not
5681 already initialized DECL. */
5682 if (!DECL_INITIALIZED_P (decl)
5683 /* If !DECL_EXTERNAL then DECL is being defined. In the
5684 case of a static data member initialized inside the
5685 class-specifier, there can be an initializer even if DECL
5686 is *not* defined. */
5687 && (!DECL_EXTERNAL (decl) || init))
5689 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5692 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5693 /* Allow libjava/prims.cc define primitive classes. */
5694 if (init != NULL_TREE
5695 || jclass == NULL_TREE
5696 || TREE_CODE (jclass) != TYPE_DECL
5697 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5698 || !same_type_ignoring_top_level_qualifiers_p
5699 (type, TREE_TYPE (TREE_TYPE (jclass))))
5700 error ("Java object %qD not allocated with %<new%>", decl);
5705 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5706 if (init_const_expr_p)
5708 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5709 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5710 TREE_CONSTANT (decl) = 1;
5713 init = check_initializer (decl, init, flags, &cleanup);
5714 /* Thread-local storage cannot be dynamically initialized. */
5715 if (DECL_THREAD_LOCAL_P (decl) && init)
5717 error ("%qD is thread-local and so cannot be dynamically "
5718 "initialized", decl);
5722 /* Check that the initializer for a static data member was a
5723 constant. Although we check in the parser that the
5724 initializer is an integral constant expression, we do not
5725 simplify division-by-zero at the point at which it
5726 occurs. Therefore, in:
5728 struct S { static const int i = 7 / 0; };
5730 we issue an error at this point. It would
5731 probably be better to forbid division by zero in
5732 integral constant expressions. */
5733 if (DECL_EXTERNAL (decl) && init)
5735 error ("%qD cannot be initialized by a non-constant expression"
5736 " when being declared", decl);
5737 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5745 The memory occupied by any object of static storage
5746 duration is zero-initialized at program startup before
5747 any other initialization takes place.
5749 We cannot create an appropriate initializer until after
5750 the type of DECL is finalized. If DECL_INITIAL is set,
5751 then the DECL is statically initialized, and any
5752 necessary zero-initialization has already been performed. */
5753 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5754 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5755 /*nelts=*/NULL_TREE,
5756 /*static_storage_p=*/true);
5757 /* Remember that the initialization for this variable has
5759 DECL_INITIALIZED_P (decl) = 1;
5760 /* This declaration is the definition of this variable,
5761 unless we are initializing a static data member within
5762 the class specifier. */
5763 if (!DECL_EXTERNAL (decl))
5764 var_definition_p = true;
5766 /* If the variable has an array type, lay out the type, even if
5767 there is no initializer. It is valid to index through the
5768 array, and we must get TYPE_ALIGN set correctly on the array
5770 else if (TREE_CODE (type) == ARRAY_TYPE)
5773 else if (TREE_CODE (decl) == FIELD_DECL
5774 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5775 error ("non-static data member %qD has Java class type", decl);
5777 /* Add this declaration to the statement-tree. This needs to happen
5778 after the call to check_initializer so that the DECL_EXPR for a
5779 reference temp is added before the DECL_EXPR for the reference itself. */
5780 if (at_function_scope_p ())
5781 add_decl_expr (decl);
5783 /* Let the middle end know about variables and functions -- but not
5784 static data members in uninstantiated class templates. */
5785 if (!saved_processing_template_decl
5786 && (TREE_CODE (decl) == VAR_DECL
5787 || TREE_CODE (decl) == FUNCTION_DECL))
5789 if (TREE_CODE (decl) == VAR_DECL)
5791 layout_var_decl (decl);
5792 maybe_commonize_var (decl);
5795 /* This needs to happen after the linkage is set. */
5796 determine_visibility (decl);
5798 if (var_definition_p && TREE_STATIC (decl))
5800 /* If a TREE_READONLY variable needs initialization
5801 at runtime, it is no longer readonly and we need to
5802 avoid MEM_READONLY_P being set on RTL created for it. */
5805 if (TREE_READONLY (decl))
5806 TREE_READONLY (decl) = 0;
5809 else if (was_readonly)
5810 TREE_READONLY (decl) = 1;
5813 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5815 /* Check for abstractness of the type. Notice that there is no
5816 need to strip array types here since the check for those types
5817 is already done within create_array_type_for_decl. */
5818 if (TREE_CODE (type) == FUNCTION_TYPE
5819 || TREE_CODE (type) == METHOD_TYPE)
5820 abstract_virtuals_error (decl, TREE_TYPE (type));
5822 abstract_virtuals_error (decl, type);
5824 if (TREE_TYPE (decl) == error_mark_node)
5825 /* No initialization required. */
5827 else if (TREE_CODE (decl) == FUNCTION_DECL)
5831 if (init == ridpointers[(int)RID_DEFAULT])
5833 /* An out-of-class default definition is defined at
5834 the point where it is explicitly defaulted. */
5835 if (DECL_INITIAL (decl) == error_mark_node)
5836 synthesize_method (decl);
5839 error ("function %q#D is initialized like a variable", decl);
5841 /* else no initialization required. */
5843 else if (DECL_EXTERNAL (decl)
5844 && ! (DECL_LANG_SPECIFIC (decl)
5845 && DECL_NOT_REALLY_EXTERN (decl)))
5848 DECL_INITIAL (decl) = init;
5850 /* A variable definition. */
5851 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5852 /* Initialize the local variable. */
5853 initialize_local_var (decl, init);
5855 /* If a variable is defined, and then a subsequent
5856 definition with external linkage is encountered, we will
5857 get here twice for the same variable. We want to avoid
5858 calling expand_static_init more than once. For variables
5859 that are not static data members, we can call
5860 expand_static_init only when we actually process the
5861 initializer. It is not legal to redeclare a static data
5862 member, so this issue does not arise in that case. */
5863 else if (var_definition_p && TREE_STATIC (decl))
5864 expand_static_init (decl, init);
5867 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5868 reference, insert it in the statement-tree now. */
5870 push_cleanup (decl, cleanup, false);
5873 processing_template_decl = saved_processing_template_decl;
5876 TREE_READONLY (decl) = 1;
5878 /* If this was marked 'used', be sure it will be output. */
5879 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5880 mark_decl_referenced (decl);
5883 /* This is here for a midend callback from c-common.c. */
5886 finish_decl (tree decl, tree init, tree origtype ATTRIBUTE_UNUSED,
5889 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5892 /* Returns a declaration for a VAR_DECL as if:
5894 extern "C" TYPE NAME;
5896 had been seen. Used to create compiler-generated global
5900 declare_global_var (tree name, tree type)
5904 push_to_top_level ();
5905 decl = build_decl (input_location, VAR_DECL, name, type);
5906 TREE_PUBLIC (decl) = 1;
5907 DECL_EXTERNAL (decl) = 1;
5908 DECL_ARTIFICIAL (decl) = 1;
5909 /* If the user has explicitly declared this variable (perhaps
5910 because the code we are compiling is part of a low-level runtime
5911 library), then it is possible that our declaration will be merged
5912 with theirs by pushdecl. */
5913 decl = pushdecl (decl);
5914 finish_decl (decl, NULL_TREE, NULL_TREE, NULL_TREE);
5915 pop_from_top_level ();
5920 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5921 if "__cxa_atexit" is not being used) corresponding to the function
5922 to be called when the program exits. */
5925 get_atexit_fn_ptr_type (void)
5930 if (!atexit_fn_ptr_type_node)
5932 if (flag_use_cxa_atexit
5933 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5934 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5935 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5937 /* The parameter to "atexit" is "void (*)(void)". */
5938 arg_types = void_list_node;
5940 fn_type = build_function_type (void_type_node, arg_types);
5941 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5944 return atexit_fn_ptr_type_node;
5947 /* Returns a pointer to the `atexit' function. Note that if
5948 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5949 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5952 get_atexit_node (void)
5959 bool use_aeabi_atexit;
5964 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5966 /* The declaration for `__cxa_atexit' is:
5968 int __cxa_atexit (void (*)(void *), void *, void *)
5970 We build up the argument types and then then function type
5973 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5974 /* First, build the pointer-to-function type for the first
5976 fn_ptr_type = get_atexit_fn_ptr_type ();
5977 /* Then, build the rest of the argument types. */
5978 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5979 if (use_aeabi_atexit)
5981 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5982 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5986 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5987 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5989 /* And the final __cxa_atexit type. */
5990 fn_type = build_function_type (integer_type_node, arg_types);
5991 fn_ptr_type = build_pointer_type (fn_type);
5992 if (use_aeabi_atexit)
5993 name = "__aeabi_atexit";
5995 name = "__cxa_atexit";
5999 /* The declaration for `atexit' is:
6001 int atexit (void (*)());
6003 We build up the argument types and then then function type
6005 fn_ptr_type = get_atexit_fn_ptr_type ();
6006 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6007 /* Build the final atexit type. */
6008 fn_type = build_function_type (integer_type_node, arg_types);
6012 /* Now, build the function declaration. */
6013 push_lang_context (lang_name_c);
6014 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6015 mark_used (atexit_fndecl);
6016 pop_lang_context ();
6017 atexit_node = decay_conversion (atexit_fndecl);
6022 /* Returns the __dso_handle VAR_DECL. */
6025 get_dso_handle_node (void)
6027 if (dso_handle_node)
6028 return dso_handle_node;
6030 /* Declare the variable. */
6031 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6034 return dso_handle_node;
6037 /* Begin a new function with internal linkage whose job will be simply
6038 to destroy some particular variable. */
6040 static GTY(()) int start_cleanup_cnt;
6043 start_cleanup_fn (void)
6048 bool use_cxa_atexit = flag_use_cxa_atexit
6049 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6051 push_to_top_level ();
6053 /* No need to mangle this. */
6054 push_lang_context (lang_name_c);
6056 /* Build the name of the function. */
6057 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6058 /* Build the function declaration. */
6059 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6060 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6061 /* It's a function with internal linkage, generated by the
6063 TREE_PUBLIC (fndecl) = 0;
6064 DECL_ARTIFICIAL (fndecl) = 1;
6065 /* Make the function `inline' so that it is only emitted if it is
6066 actually needed. It is unlikely that it will be inlined, since
6067 it is only called via a function pointer, but we avoid unnecessary
6068 emissions this way. */
6069 DECL_DECLARED_INLINE_P (fndecl) = 1;
6070 DECL_INTERFACE_KNOWN (fndecl) = 1;
6071 /* Build the parameter. */
6076 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6077 DECL_CONTEXT (parmdecl) = fndecl;
6078 TREE_USED (parmdecl) = 1;
6079 DECL_ARGUMENTS (fndecl) = parmdecl;
6083 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6085 pop_lang_context ();
6087 return current_function_decl;
6090 /* Finish the cleanup function begun by start_cleanup_fn. */
6093 end_cleanup_fn (void)
6095 expand_or_defer_fn (finish_function (0));
6097 pop_from_top_level ();
6100 /* Generate code to handle the destruction of DECL, an object with
6101 static storage duration. */
6104 register_dtor_fn (tree decl)
6113 type = TREE_TYPE (decl);
6114 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6115 return void_zero_node;
6117 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6118 a class object, we can just pass the destructor to
6119 "__cxa_atexit"; we don't have to build a temporary function to do
6121 use_dtor = (flag_use_cxa_atexit
6122 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6123 && CLASS_TYPE_P (type));
6128 /* Find the destructor. */
6129 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6130 gcc_assert (idx >= 0);
6131 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6132 /* Make sure it is accessible. */
6133 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6137 /* Call build_cleanup before we enter the anonymous function so
6138 that any access checks will be done relative to the current
6139 scope, rather than the scope of the anonymous function. */
6140 build_cleanup (decl);
6142 /* Now start the function. */
6143 cleanup = start_cleanup_fn ();
6145 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6146 to the original function, rather than the anonymous one. That
6147 will make the back end think that nested functions are in use,
6148 which causes confusion. */
6149 push_deferring_access_checks (dk_no_check);
6150 fcall = build_cleanup (decl);
6151 pop_deferring_access_checks ();
6153 /* Create the body of the anonymous function. */
6154 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6155 finish_expr_stmt (fcall);
6156 finish_compound_stmt (compound_stmt);
6160 /* Call atexit with the cleanup function. */
6161 mark_used (cleanup);
6162 cleanup = build_address (cleanup);
6163 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6169 /* We must convert CLEANUP to the type that "__cxa_atexit"
6171 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6172 /* "__cxa_atexit" will pass the address of DECL to the
6173 cleanup function. */
6175 addr = build_address (decl);
6176 /* The declared type of the parameter to "__cxa_atexit" is
6177 "void *". For plain "T*", we could just let the
6178 machinery in cp_build_function_call convert it -- but if the
6179 type is "cv-qualified T *", then we need to convert it
6180 before passing it in, to avoid spurious errors. */
6181 addr = build_nop (ptr_type_node, addr);
6184 /* Since the cleanup functions we build ignore the address
6185 they're given, there's no reason to pass the actual address
6186 in, and, in general, it's cheaper to pass NULL than any
6188 addr = null_pointer_node;
6189 args = tree_cons (NULL_TREE,
6190 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6191 tf_warning_or_error),
6193 if (targetm.cxx.use_aeabi_atexit ())
6195 args = tree_cons (NULL_TREE, cleanup, args);
6196 args = tree_cons (NULL_TREE, addr, args);
6200 args = tree_cons (NULL_TREE, addr, args);
6201 args = tree_cons (NULL_TREE, cleanup, args);
6205 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6206 return cp_build_function_call (get_atexit_node (), args,
6207 tf_warning_or_error);
6210 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6211 is its initializer. Generate code to handle the construction
6212 and destruction of DECL. */
6215 expand_static_init (tree decl, tree init)
6217 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6218 gcc_assert (TREE_STATIC (decl));
6220 /* Some variables require no initialization. */
6222 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6223 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6226 if (DECL_FUNCTION_SCOPE_P (decl))
6228 /* Emit code to perform this initialization but once. */
6229 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6230 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6231 tree guard, guard_addr;
6232 tree acquire_fn, release_fn, abort_fn;
6235 /* Emit code to perform this initialization but once. This code
6238 static <type> guard;
6239 if (!guard.first_byte) {
6240 if (__cxa_guard_acquire (&guard)) {
6243 // Do initialization.
6244 flag = true; __cxa_guard_release (&guard);
6245 // Register variable for destruction at end of program.
6247 if (!flag) __cxa_guard_abort (&guard);
6251 Note that the `flag' variable is only set to 1 *after* the
6252 initialization is complete. This ensures that an exception,
6253 thrown during the construction, will cause the variable to
6254 reinitialized when we pass through this code again, as per:
6258 If the initialization exits by throwing an exception, the
6259 initialization is not complete, so it will be tried again
6260 the next time control enters the declaration.
6262 This process should be thread-safe, too; multiple threads
6263 should not be able to initialize the variable more than
6266 /* Create the guard variable. */
6267 guard = get_guard (decl);
6269 /* This optimization isn't safe on targets with relaxed memory
6270 consistency. On such targets we force synchronization in
6271 __cxa_guard_acquire. */
6272 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6274 /* Begin the conditional initialization. */
6275 if_stmt = begin_if_stmt ();
6276 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6277 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6280 if (flag_threadsafe_statics)
6282 guard_addr = build_address (guard);
6284 acquire_fn = get_identifier ("__cxa_guard_acquire");
6285 release_fn = get_identifier ("__cxa_guard_release");
6286 abort_fn = get_identifier ("__cxa_guard_abort");
6287 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6289 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6291 tree vfntype = build_function_type (void_type_node, argtypes);
6292 acquire_fn = push_library_fn
6293 (acquire_fn, build_function_type (integer_type_node, argtypes),
6295 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6296 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6300 release_fn = identifier_global_value (release_fn);
6301 abort_fn = identifier_global_value (abort_fn);
6304 inner_if_stmt = begin_if_stmt ();
6305 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6308 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6309 begin = get_target_expr (boolean_false_node);
6310 flag = TARGET_EXPR_SLOT (begin);
6312 TARGET_EXPR_CLEANUP (begin)
6313 = build3 (COND_EXPR, void_type_node, flag,
6315 build_call_n (abort_fn, 1, guard_addr));
6316 CLEANUP_EH_ONLY (begin) = 1;
6318 /* Do the initialization itself. */
6319 init = add_stmt_to_compound (begin, init);
6320 init = add_stmt_to_compound
6321 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6322 init = add_stmt_to_compound
6323 (init, build_call_n (release_fn, 1, guard_addr));
6326 init = add_stmt_to_compound (init, set_guard (guard));
6328 /* Use atexit to register a function for destroying this static
6330 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6332 finish_expr_stmt (init);
6334 if (flag_threadsafe_statics)
6336 finish_compound_stmt (inner_then_clause);
6337 finish_then_clause (inner_if_stmt);
6338 finish_if_stmt (inner_if_stmt);
6341 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6343 finish_compound_stmt (then_clause);
6344 finish_then_clause (if_stmt);
6345 finish_if_stmt (if_stmt);
6349 static_aggregates = tree_cons (init, decl, static_aggregates);
6353 /* Make TYPE a complete type based on INITIAL_VALUE.
6354 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6355 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6356 3 if the initializer list is empty (in pedantic mode). */
6359 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6362 tree type, elt_type;
6366 unsigned HOST_WIDE_INT i;
6369 /* An array of character type can be initialized from a
6370 brace-enclosed string constant.
6372 FIXME: this code is duplicated from reshape_init. Probably
6373 we should just call reshape_init here? */
6374 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6375 && TREE_CODE (initial_value) == CONSTRUCTOR
6376 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6378 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6379 tree value = VEC_index (constructor_elt, v, 0)->value;
6381 if (TREE_CODE (value) == STRING_CST
6382 && VEC_length (constructor_elt, v) == 1)
6383 initial_value = value;
6386 /* If any of the elements are parameter packs, we can't actually
6387 complete this type now because the array size is dependent. */
6388 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6390 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6393 if (PACK_EXPANSION_P (value))
6399 failure = complete_array_type (ptype, initial_value, do_default);
6401 /* We can create the array before the element type is complete, which
6402 means that we didn't have these two bits set in the original type
6403 either. In completing the type, we are expected to propagate these
6404 bits. See also complete_type which does the same thing for arrays
6407 if (TYPE_DOMAIN (type))
6409 elt_type = TREE_TYPE (type);
6410 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6411 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6412 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6418 /* Return zero if something is declared to be a member of type
6419 CTYPE when in the context of CUR_TYPE. STRING is the error
6420 message to print in that case. Otherwise, quietly return 1. */
6423 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6425 if (ctype && ctype != cur_type)
6427 if (flags == DTOR_FLAG)
6428 error ("destructor for alien class %qT cannot be a member", ctype);
6430 error ("constructor for alien class %qT cannot be a member", ctype);
6436 /* Subroutine of `grokdeclarator'. */
6438 /* Generate errors possibly applicable for a given set of specifiers.
6439 This is for ARM $7.1.2. */
6442 bad_specifiers (tree object,
6451 error ("%qD declared as a %<virtual%> %s", object, type);
6453 error ("%qD declared as an %<inline%> %s", object, type);
6455 error ("%<const%> and %<volatile%> function specifiers on "
6456 "%qD invalid in %s declaration",
6459 error ("%q+D declared as a friend", object);
6461 && (TREE_CODE (object) == TYPE_DECL
6462 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6463 && !TYPE_REFFN_P (TREE_TYPE (object))
6464 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6465 error ("%q+D declared with an exception specification", object);
6468 /* DECL is a member function or static data member and is presently
6469 being defined. Check that the definition is taking place in a
6473 check_class_member_definition_namespace (tree decl)
6475 /* These checks only apply to member functions and static data
6477 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6478 || TREE_CODE (decl) == VAR_DECL);
6479 /* We check for problems with specializations in pt.c in
6480 check_specialization_namespace, where we can issue better
6482 if (processing_specialization)
6484 /* There are no restrictions on the placement of
6485 explicit instantiations. */
6486 if (processing_explicit_instantiation)
6490 A member function definition that appears outside of the
6491 class definition shall appear in a namespace scope enclosing
6492 the class definition.
6496 The definition for a static data member shall appear in a
6497 namespace scope enclosing the member's class definition. */
6498 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6499 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6500 decl, DECL_CONTEXT (decl));
6503 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6504 METHOD_TYPE for a non-static member function; QUALS are the
6505 cv-qualifiers that apply to the function. */
6508 build_this_parm (tree type, cp_cv_quals quals)
6513 cp_cv_quals this_quals;
6515 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6516 /* The `this' parameter is implicitly `const'; it cannot be
6518 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6519 qual_type = cp_build_qualified_type (this_type, this_quals);
6520 parm = build_artificial_parm (this_identifier, qual_type);
6521 cp_apply_type_quals_to_decl (this_quals, parm);
6525 /* CTYPE is class type, or null if non-class.
6526 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6528 DECLARATOR is the function's name.
6529 PARMS is a chain of PARM_DECLs for the function.
6530 VIRTUALP is truthvalue of whether the function is virtual or not.
6531 FLAGS are to be passed through to `grokclassfn'.
6532 QUALS are qualifiers indicating whether the function is `const'
6534 RAISES is a list of exceptions that this function can raise.
6535 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6536 not look, and -1 if we should not call `grokclassfn' at all.
6538 SFK is the kind of special function (if any) for the new function.
6540 Returns `NULL_TREE' if something goes wrong, after issuing
6541 applicable error messages. */
6544 grokfndecl (tree ctype,
6548 tree orig_declarator,
6550 enum overload_flags flags,
6557 special_function_kind sfk,
6562 location_t location)
6565 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6569 type = build_exception_variant (type, raises);
6571 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6573 /* If we have an explicit location, use it, otherwise use whatever
6574 build_lang_decl used (probably input_location). */
6575 if (location != UNKNOWN_LOCATION)
6576 DECL_SOURCE_LOCATION (decl) = location;
6578 if (TREE_CODE (type) == METHOD_TYPE)
6581 parm = build_this_parm (type, quals);
6582 TREE_CHAIN (parm) = parms;
6585 DECL_ARGUMENTS (decl) = parms;
6586 for (t = parms; t; t = TREE_CHAIN (t))
6587 DECL_CONTEXT (t) = decl;
6588 /* Propagate volatile out from type to decl. */
6589 if (TYPE_VOLATILE (type))
6590 TREE_THIS_VOLATILE (decl) = 1;
6592 /* Setup decl according to sfk. */
6595 case sfk_constructor:
6596 case sfk_copy_constructor:
6597 DECL_CONSTRUCTOR_P (decl) = 1;
6599 case sfk_destructor:
6600 DECL_DESTRUCTOR_P (decl) = 1;
6606 /* If pointers to member functions use the least significant bit to
6607 indicate whether a function is virtual, ensure a pointer
6608 to this function will have that bit clear. */
6609 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6610 && TREE_CODE (type) == METHOD_TYPE
6611 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6612 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6615 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6619 ("defining explicit specialization %qD in friend declaration",
6623 tree fns = TREE_OPERAND (orig_declarator, 0);
6624 tree args = TREE_OPERAND (orig_declarator, 1);
6626 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6628 /* Something like `template <class T> friend void f<T>()'. */
6629 error ("invalid use of template-id %qD in declaration "
6630 "of primary template",
6636 /* A friend declaration of the form friend void f<>(). Record
6637 the information in the TEMPLATE_ID_EXPR. */
6638 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6640 if (TREE_CODE (fns) == COMPONENT_REF)
6642 /* Due to bison parser ickiness, we will have already looked
6643 up an operator_name or PFUNCNAME within the current class
6644 (see template_id in parse.y). If the current class contains
6645 such a name, we'll get a COMPONENT_REF here. Undo that. */
6647 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6648 == current_class_type);
6649 fns = TREE_OPERAND (fns, 1);
6651 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6652 || TREE_CODE (fns) == OVERLOAD);
6653 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6655 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6656 if (TREE_PURPOSE (t)
6657 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6659 error ("default arguments are not allowed in declaration "
6660 "of friend template specialization %qD",
6667 error ("%<inline%> is not allowed in declaration of friend "
6668 "template specialization %qD",
6675 /* If this decl has namespace scope, set that up. */
6677 set_decl_namespace (decl, in_namespace, friendp);
6679 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6681 /* `main' and builtins have implicit 'C' linkage. */
6682 if ((MAIN_NAME_P (declarator)
6683 || (IDENTIFIER_LENGTH (declarator) > 10
6684 && IDENTIFIER_POINTER (declarator)[0] == '_'
6685 && IDENTIFIER_POINTER (declarator)[1] == '_'
6686 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6687 && current_lang_name == lang_name_cplusplus
6688 && ctype == NULL_TREE
6689 /* NULL_TREE means global namespace. */
6690 && DECL_CONTEXT (decl) == NULL_TREE)
6691 SET_DECL_LANGUAGE (decl, lang_c);
6693 /* Should probably propagate const out from type to decl I bet (mrs). */
6696 DECL_STATIC_FUNCTION_P (decl) = 1;
6697 DECL_CONTEXT (decl) = ctype;
6702 DECL_CONTEXT (decl) = ctype;
6704 check_class_member_definition_namespace (decl);
6707 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6709 if (processing_template_decl)
6710 error ("cannot declare %<::main%> to be a template");
6712 error ("cannot declare %<::main%> to be inline");
6714 error ("cannot declare %<::main%> to be static");
6719 /* Members of anonymous types and local classes have no linkage; make
6720 them internal. If a typedef is made later, this will be changed. */
6721 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6722 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6727 /* [basic.link]: A name with no linkage (notably, the name of a class
6728 or enumeration declared in a local scope) shall not be used to
6729 declare an entity with linkage.
6731 Only check this for public decls for now. See core 319, 389. */
6732 t = no_linkage_check (TREE_TYPE (decl),
6733 /*relaxed_p=*/false);
6736 if (TYPE_ANONYMOUS_P (t))
6738 if (DECL_EXTERN_C_P (decl))
6739 /* Allow this; it's pretty common in C. */;
6742 permerror (input_location, "non-local function %q#D uses anonymous type",
6744 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6745 permerror (input_location, "%q+#D does not refer to the unqualified "
6746 "type, so it is not used for linkage",
6751 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6755 TREE_PUBLIC (decl) = publicp;
6758 DECL_INTERFACE_KNOWN (decl) = 1;
6759 DECL_NOT_REALLY_EXTERN (decl) = 1;
6762 /* If the declaration was declared inline, mark it as such. */
6764 DECL_DECLARED_INLINE_P (decl) = 1;
6766 DECL_EXTERNAL (decl) = 1;
6767 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6770 ? G_("static member function %qD cannot have cv-qualifier")
6771 : G_("non-member function %qD cannot have cv-qualifier"),
6773 quals = TYPE_UNQUALIFIED;
6776 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6777 && !grok_op_properties (decl, /*complain=*/true))
6780 if (ctype && decl_function_context (decl))
6781 DECL_NO_STATIC_CHAIN (decl) = 1;
6784 /* Make the init_value nonzero so pushdecl knows this is not
6785 tentative. error_mark_node is replaced later with the BLOCK. */
6786 DECL_INITIAL (decl) = error_mark_node;
6788 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6789 TREE_NOTHROW (decl) = 1;
6791 /* Caller will do the rest of this. */
6795 if (ctype != NULL_TREE)
6796 grokclassfn (ctype, decl, flags);
6798 decl = check_explicit_specialization (orig_declarator, decl,
6801 4 * (friendp != 0));
6802 if (decl == error_mark_node)
6807 cplus_decl_attributes (&decl, *attrlist, 0);
6808 *attrlist = NULL_TREE;
6811 /* Check main's type after attributes have been applied. */
6812 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6814 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6817 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6819 error ("%<::main%> must return %<int%>");
6820 newtype = build_function_type (integer_type_node, oldtypeargs);
6821 TREE_TYPE (decl) = newtype;
6824 check_main_parameter_types (decl);
6827 if (ctype != NULL_TREE
6828 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6831 tree old_decl = check_classfn (ctype, decl,
6832 (processing_template_decl
6833 > template_class_depth (ctype))
6834 ? current_template_parms
6837 if (old_decl == error_mark_node)
6845 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6846 /* Because grokfndecl is always supposed to return a
6847 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6848 here. We depend on our callers to figure out that its
6849 really a template that's being returned. */
6850 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6852 if (DECL_STATIC_FUNCTION_P (old_decl)
6853 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6854 /* Remove the `this' parm added by grokclassfn.
6855 XXX Isn't this done in start_function, too? */
6856 revert_static_member_fn (decl);
6857 if (DECL_ARTIFICIAL (old_decl))
6859 error ("definition of implicitly-declared %qD", old_decl);
6863 /* Since we've smashed OLD_DECL to its
6864 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6865 if (TREE_CODE (decl) == TEMPLATE_DECL)
6866 decl = DECL_TEMPLATE_RESULT (decl);
6868 /* Attempt to merge the declarations. This can fail, in
6869 the case of some invalid specialization declarations. */
6870 pushed_scope = push_scope (ctype);
6871 ok = duplicate_decls (decl, old_decl, friendp);
6873 pop_scope (pushed_scope);
6876 error ("no %q#D member function declared in class %qT",
6884 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6887 if (ctype == NULL_TREE || check)
6891 DECL_VIRTUAL_P (decl) = 1;
6896 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6897 the linkage that DECL will receive in the object file. */
6900 set_linkage_for_static_data_member (tree decl)
6902 /* A static data member always has static storage duration and
6903 external linkage. Note that static data members are forbidden in
6904 local classes -- the only situation in which a class has
6905 non-external linkage. */
6906 TREE_PUBLIC (decl) = 1;
6907 TREE_STATIC (decl) = 1;
6908 /* For non-template classes, static data members are always put
6909 out in exactly those files where they are defined, just as
6910 with ordinary namespace-scope variables. */
6911 if (!processing_template_decl)
6912 DECL_INTERFACE_KNOWN (decl) = 1;
6915 /* Create a VAR_DECL named NAME with the indicated TYPE.
6917 If SCOPE is non-NULL, it is the class type or namespace containing
6918 the variable. If SCOPE is NULL, the variable should is created in
6919 the innermost enclosings scope. */
6922 grokvardecl (tree type,
6924 const cp_decl_specifier_seq *declspecs,
6930 tree explicit_scope;
6932 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6934 /* Compute the scope in which to place the variable, but remember
6935 whether or not that scope was explicitly specified by the user. */
6936 explicit_scope = scope;
6939 /* An explicit "extern" specifier indicates a namespace-scope
6941 if (declspecs->storage_class == sc_extern)
6942 scope = current_namespace;
6943 else if (!at_function_scope_p ())
6944 scope = current_scope ();
6948 && (/* If the variable is a namespace-scope variable declared in a
6949 template, we need DECL_LANG_SPECIFIC. */
6950 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6951 /* Similarly for namespace-scope variables with language linkage
6953 || (TREE_CODE (scope) == NAMESPACE_DECL
6954 && current_lang_name != lang_name_cplusplus)
6955 /* Similarly for static data members. */
6957 decl = build_lang_decl (VAR_DECL, name, type);
6959 decl = build_decl (input_location, VAR_DECL, name, type);
6961 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6962 set_decl_namespace (decl, explicit_scope, 0);
6964 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6966 if (declspecs->storage_class == sc_extern)
6968 DECL_THIS_EXTERN (decl) = 1;
6969 DECL_EXTERNAL (decl) = !initialized;
6972 if (DECL_CLASS_SCOPE_P (decl))
6974 set_linkage_for_static_data_member (decl);
6975 /* This function is only called with out-of-class definitions. */
6976 DECL_EXTERNAL (decl) = 0;
6977 check_class_member_definition_namespace (decl);
6979 /* At top level, either `static' or no s.c. makes a definition
6980 (perhaps tentative), and absence of `static' makes it public. */
6981 else if (toplevel_bindings_p ())
6983 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6984 && (DECL_THIS_EXTERN (decl) || ! constp));
6985 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6987 /* Not at top level, only `static' makes a static definition. */
6990 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6991 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6994 if (declspecs->specs[(int)ds_thread])
6995 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6997 if (TREE_PUBLIC (decl))
6999 /* [basic.link]: A name with no linkage (notably, the name of a class
7000 or enumeration declared in a local scope) shall not be used to
7001 declare an entity with linkage.
7003 Only check this for public decls for now. */
7004 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7007 if (TYPE_ANONYMOUS_P (t))
7009 if (DECL_EXTERN_C_P (decl))
7010 /* Allow this; it's pretty common in C. */
7014 /* DRs 132, 319 and 389 seem to indicate types with
7015 no linkage can only be used to declare extern "C"
7016 entities. Since it's not always an error in the
7017 ISO C++ 90 Standard, we only issue a warning. */
7018 warning (0, "non-local variable %q#D uses anonymous type",
7020 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7021 warning (0, "%q+#D does not refer to the unqualified "
7022 "type, so it is not used for linkage",
7027 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7031 DECL_INTERFACE_KNOWN (decl) = 1;
7036 /* Create and return a canonical pointer to member function type, for
7037 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7040 build_ptrmemfunc_type (tree type)
7044 tree unqualified_variant = NULL_TREE;
7046 if (type == error_mark_node)
7049 /* If a canonical type already exists for this type, use it. We use
7050 this method instead of type_hash_canon, because it only does a
7051 simple equality check on the list of field members. */
7053 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7056 /* Make sure that we always have the unqualified pointer-to-member
7058 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7060 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7062 t = make_class_type (RECORD_TYPE);
7063 xref_basetypes (t, NULL_TREE);
7065 /* Let the front end know this is a pointer to member function... */
7066 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7067 /* ... and not really a class type. */
7068 SET_CLASS_TYPE_P (t, 0);
7070 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7073 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7075 TREE_CHAIN (field) = fields;
7078 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7080 /* Zap out the name so that the back end will give us the debugging
7081 information for this anonymous RECORD_TYPE. */
7082 TYPE_NAME (t) = NULL_TREE;
7084 /* If this is not the unqualified form of this pointer-to-member
7085 type, set the TYPE_MAIN_VARIANT for this type to be the
7086 unqualified type. Since they are actually RECORD_TYPEs that are
7087 not variants of each other, we must do this manually. */
7088 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7090 t = build_qualified_type (t, cp_type_quals (type));
7091 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7092 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7093 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7094 TREE_TYPE (TYPE_BINFO (t)) = t;
7097 /* Cache this pointer-to-member type so that we can find it again
7099 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7101 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7102 SET_TYPE_STRUCTURAL_EQUALITY (t);
7103 else if (TYPE_CANONICAL (type) != type)
7104 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7109 /* Create and return a pointer to data member type. */
7112 build_ptrmem_type (tree class_type, tree member_type)
7114 if (TREE_CODE (member_type) == METHOD_TYPE)
7118 arg_types = TYPE_ARG_TYPES (member_type);
7119 class_type = (cp_build_qualified_type
7121 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7123 = build_method_type_directly (class_type,
7124 TREE_TYPE (member_type),
7125 TREE_CHAIN (arg_types));
7126 return build_ptrmemfunc_type (build_pointer_type (member_type));
7130 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7131 return build_offset_type (class_type, member_type);
7135 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7136 Check to see that the definition is valid. Issue appropriate error
7137 messages. Return 1 if the definition is particularly bad, or 0
7141 check_static_variable_definition (tree decl, tree type)
7143 /* Motion 10 at San Diego: If a static const integral data member is
7144 initialized with an integral constant expression, the initializer
7145 may appear either in the declaration (within the class), or in
7146 the definition, but not both. If it appears in the class, the
7147 member is a member constant. The file-scope definition is always
7149 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7151 error ("invalid in-class initialization of static data member "
7152 "of non-integral type %qT",
7154 /* If we just return the declaration, crashes will sometimes
7155 occur. We therefore return void_type_node, as if this were a
7156 friend declaration, to cause callers to completely ignore
7157 this declaration. */
7160 else if (!CP_TYPE_CONST_P (type))
7161 error ("ISO C++ forbids in-class initialization of non-const "
7162 "static member %qD",
7164 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7165 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7166 "%qD of non-integral type %qT", decl, type);
7171 /* Given the SIZE (i.e., number of elements) in an array, compute an
7172 appropriate index type for the array. If non-NULL, NAME is the
7173 name of the thing being declared. */
7176 compute_array_index_type (tree name, tree size)
7180 tree abi_1_itype = NULL_TREE;
7182 if (error_operand_p (size))
7183 return error_mark_node;
7185 type = TREE_TYPE (size);
7186 /* The array bound must be an integer type. */
7187 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7190 error ("size of array %qD has non-integral type %qT", name, type);
7192 error ("size of array has non-integral type %qT", type);
7193 size = integer_one_node;
7194 type = TREE_TYPE (size);
7197 /* We can only call value_dependent_expression_p on integral constant
7198 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7199 set if this isn't one. */
7200 if (processing_template_decl
7201 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7203 /* We cannot do any checking for a SIZE that isn't known to be
7204 constant. Just build the index type and mark that it requires
7205 structural equality checks. */
7206 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7207 size, integer_one_node));
7208 if (!TREE_SIDE_EFFECTS (size))
7210 TYPE_DEPENDENT_P (itype) = 1;
7211 TYPE_DEPENDENT_P_VALID (itype) = 1;
7213 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7217 if (!abi_version_at_least (2) && processing_template_decl)
7218 /* For abi-1, we handled all instances in templates the same way,
7219 even when they were non-dependent. This affects the manglings
7220 produced. So, we do the normal checking for non-dependent
7221 sizes, but at the end we'll return the same type that abi-1
7222 would have, but with TYPE_CANONICAL set to the "right"
7223 value that the current ABI would provide. */
7224 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7225 size, integer_one_node));
7227 /* The size might be the result of a cast. */
7228 STRIP_TYPE_NOPS (size);
7230 /* It might be a const variable or enumeration constant. */
7231 size = integral_constant_value (size);
7233 /* Normally, the array-bound will be a constant. */
7234 if (TREE_CODE (size) == INTEGER_CST)
7236 /* Check to see if the array bound overflowed. Make that an
7237 error, no matter how generous we're being. */
7238 constant_expression_error (size);
7240 /* An array must have a positive number of elements. */
7241 if (INT_CST_LT (size, integer_zero_node))
7244 error ("size of array %qD is negative", name);
7246 error ("size of array is negative");
7247 size = integer_one_node;
7249 /* As an extension we allow zero-sized arrays. We always allow
7250 them in system headers because glibc uses them. */
7251 else if (integer_zerop (size) && !in_system_header)
7254 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7256 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7259 else if (TREE_CONSTANT (size))
7261 /* `(int) &fn' is not a valid array bound. */
7263 error ("size of array %qD is not an integral constant-expression",
7266 error ("size of array is not an integral constant-expression");
7267 size = integer_one_node;
7269 else if (pedantic && warn_vla != 0)
7272 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7274 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7276 else if (warn_vla > 0)
7280 "variable length array %qD is used", name);
7283 "variable length array is used");
7286 if (processing_template_decl && !TREE_CONSTANT (size))
7287 /* A variable sized array. */
7288 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7291 HOST_WIDE_INT saved_processing_template_decl;
7293 /* Compute the index of the largest element in the array. It is
7294 one less than the number of elements in the array. We save
7295 and restore PROCESSING_TEMPLATE_DECL so that computations in
7296 cp_build_binary_op will be appropriately folded. */
7297 saved_processing_template_decl = processing_template_decl;
7298 processing_template_decl = 0;
7299 itype = cp_build_binary_op (input_location,
7301 cp_convert (ssizetype, size),
7302 cp_convert (ssizetype, integer_one_node),
7303 tf_warning_or_error);
7304 itype = fold (itype);
7305 processing_template_decl = saved_processing_template_decl;
7307 if (!TREE_CONSTANT (itype))
7308 /* A variable sized array. */
7309 itype = variable_size (itype);
7310 /* Make sure that there was no overflow when creating to a signed
7311 index type. (For example, on a 32-bit machine, an array with
7312 size 2^32 - 1 is too big.) */
7313 else if (TREE_CODE (itype) == INTEGER_CST
7314 && TREE_OVERFLOW (itype))
7316 error ("overflow in array dimension");
7317 TREE_OVERFLOW (itype) = 0;
7321 /* Create and return the appropriate index type. */
7324 tree t = build_index_type (itype);
7325 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7329 return build_index_type (itype);
7332 /* Returns the scope (if any) in which the entity declared by
7333 DECLARATOR will be located. If the entity was declared with an
7334 unqualified name, NULL_TREE is returned. */
7337 get_scope_of_declarator (const cp_declarator *declarator)
7339 while (declarator && declarator->kind != cdk_id)
7340 declarator = declarator->declarator;
7342 /* If the declarator-id is a SCOPE_REF, the scope in which the
7343 declaration occurs is the first operand. */
7345 && declarator->u.id.qualifying_scope)
7346 return declarator->u.id.qualifying_scope;
7348 /* Otherwise, the declarator is not a qualified name; the entity will
7349 be declared in the current scope. */
7353 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7354 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7358 create_array_type_for_decl (tree name, tree type, tree size)
7360 tree itype = NULL_TREE;
7361 const char* error_msg;
7363 /* If things have already gone awry, bail now. */
7364 if (type == error_mark_node || size == error_mark_node)
7365 return error_mark_node;
7367 /* Assume that everything will go OK. */
7370 /* There are some types which cannot be array elements. */
7371 switch (TREE_CODE (type))
7374 error_msg = "array of void";
7378 error_msg = "array of functions";
7381 case REFERENCE_TYPE:
7382 error_msg = "array of references";
7386 error_msg = "array of function members";
7393 /* If something went wrong, issue an error-message and return. */
7397 error ("declaration of %qD as %s", name, error_msg);
7399 error ("creating %s", error_msg);
7401 return error_mark_node;
7406 The constant expressions that specify the bounds of the arrays
7407 can be omitted only for the first member of the sequence. */
7408 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7411 error ("declaration of %qD as multidimensional array must "
7412 "have bounds for all dimensions except the first",
7415 error ("multidimensional array must have bounds for all "
7416 "dimensions except the first");
7418 return error_mark_node;
7421 /* Figure out the index type for the array. */
7423 itype = compute_array_index_type (name, size);
7426 T is called the array element type; this type shall not be [...] an
7427 abstract class type. */
7428 abstract_virtuals_error (name, type);
7430 return build_cplus_array_type (type, itype);
7433 /* Check that it's OK to declare a function with the indicated TYPE.
7434 SFK indicates the kind of special function (if any) that this
7435 function is. OPTYPE is the type given in a conversion operator
7436 declaration, or the class type for a constructor/destructor.
7437 Returns the actual return type of the function; that
7438 may be different than TYPE if an error occurs, or for certain
7439 special functions. */
7442 check_special_function_return_type (special_function_kind sfk,
7448 case sfk_constructor:
7450 error ("return type specification for constructor invalid");
7452 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7453 type = build_pointer_type (optype);
7455 type = void_type_node;
7458 case sfk_destructor:
7460 error ("return type specification for destructor invalid");
7461 /* We can't use the proper return type here because we run into
7462 problems with ambiguous bases and covariant returns.
7463 Java classes are left unchanged because (void *) isn't a valid
7464 Java type, and we don't want to change the Java ABI. */
7465 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7466 type = build_pointer_type (void_type_node);
7468 type = void_type_node;
7471 case sfk_conversion:
7473 error ("return type specified for %<operator %T%>", optype);
7484 /* A variable or data member (whose unqualified name is IDENTIFIER)
7485 has been declared with the indicated TYPE. If the TYPE is not
7486 acceptable, issue an error message and return a type to use for
7487 error-recovery purposes. */
7490 check_var_type (tree identifier, tree type)
7492 if (VOID_TYPE_P (type))
7495 error ("unnamed variable or field declared void");
7496 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7498 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7499 error ("variable or field %qE declared void", identifier);
7502 error ("variable or field declared void");
7503 type = error_mark_node;
7509 /* Given declspecs and a declarator (abstract or otherwise), determine
7510 the name and type of the object declared and construct a DECL node
7513 DECLSPECS points to the representation of declaration-specifier
7514 sequence that precedes declarator.
7516 DECL_CONTEXT says which syntactic context this declaration is in:
7517 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7518 FUNCDEF for a function definition. Like NORMAL but a few different
7519 error messages in each case. Return value may be zero meaning
7520 this definition is too screwy to try to parse.
7521 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7522 handle member functions (which have FIELD context).
7523 Return value may be zero meaning this definition is too screwy to
7525 PARM for a parameter declaration (either within a function prototype
7526 or before a function body). Make a PARM_DECL, or return void_type_node.
7527 CATCHPARM for a parameter declaration before a catch clause.
7528 TYPENAME if for a typename (in a cast or sizeof).
7529 Don't make a DECL node; just return the ..._TYPE node.
7530 FIELD for a struct or union field; make a FIELD_DECL.
7531 BITFIELD for a field with specified width.
7532 INITIALIZED is as for start_decl.
7534 ATTRLIST is a pointer to the list of attributes, which may be NULL
7535 if there are none; *ATTRLIST may be modified if attributes from inside
7536 the declarator should be applied to the declaration.
7538 When this function is called, scoping variables (such as
7539 CURRENT_CLASS_TYPE) should reflect the scope in which the
7540 declaration occurs, not the scope in which the new declaration will
7541 be placed. For example, on:
7545 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7548 Returns a DECL (if a declarator is present), a TYPE (if there is no
7549 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7553 grokdeclarator (const cp_declarator *declarator,
7554 const cp_decl_specifier_seq *declspecs,
7555 enum decl_context decl_context,
7559 tree type = NULL_TREE;
7561 int virtualp, explicitp, friendp, inlinep, staticp;
7562 int explicit_int = 0;
7563 int explicit_char = 0;
7564 int defaulted_int = 0;
7565 tree dependent_name = NULL_TREE;
7567 tree typedef_decl = NULL_TREE;
7568 const char *name = NULL;
7569 tree typedef_type = NULL_TREE;
7570 /* True if this declarator is a function definition. */
7571 bool funcdef_flag = false;
7572 cp_declarator_kind innermost_code = cdk_error;
7575 /* See the code below that used this. */
7576 tree decl_attr = NULL_TREE;
7579 /* Keep track of what sort of function is being processed
7580 so that we can warn about default return values, or explicit
7581 return values which do not match prescribed defaults. */
7582 special_function_kind sfk = sfk_none;
7584 tree dname = NULL_TREE;
7585 tree ctor_return_type = NULL_TREE;
7586 enum overload_flags flags = NO_SPECIAL;
7587 /* cv-qualifiers that apply to the declarator, for a declaration of
7588 a member function. */
7589 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7590 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7592 tree raises = NULL_TREE;
7593 int template_count = 0;
7594 tree returned_attrs = NULL_TREE;
7595 tree parms = NULL_TREE;
7596 const cp_declarator *id_declarator;
7597 /* The unqualified name of the declarator; either an
7598 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7599 tree unqualified_id;
7600 /* The class type, if any, in which this entity is located,
7601 or NULL_TREE if none. Note that this value may be different from
7602 the current class type; for example if an attempt is made to declare
7603 "A::f" inside "B", this value will be "A". */
7604 tree ctype = current_class_type;
7605 /* The NAMESPACE_DECL for the namespace in which this entity is
7606 located. If an unqualified name is used to declare the entity,
7607 this value will be NULL_TREE, even if the entity is located at
7609 tree in_namespace = NULL_TREE;
7610 cp_storage_class storage_class;
7611 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7612 bool type_was_error_mark_node = false;
7613 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7614 bool set_no_warning = false;
7615 bool template_type_arg = false;
7618 signed_p = declspecs->specs[(int)ds_signed];
7619 unsigned_p = declspecs->specs[(int)ds_unsigned];
7620 short_p = declspecs->specs[(int)ds_short];
7621 long_p = declspecs->specs[(int)ds_long];
7622 longlong = declspecs->specs[(int)ds_long] >= 2;
7623 thread_p = declspecs->specs[(int)ds_thread];
7625 if (decl_context == FUNCDEF)
7626 funcdef_flag = true, decl_context = NORMAL;
7627 else if (decl_context == MEMFUNCDEF)
7628 funcdef_flag = true, decl_context = FIELD;
7629 else if (decl_context == BITFIELD)
7630 bitfield = 1, decl_context = FIELD;
7631 else if (decl_context == TEMPLATE_TYPE_ARG)
7632 template_type_arg = true, decl_context = TYPENAME;
7634 if (initialized > 1)
7635 funcdef_flag = true;
7637 /* Look inside a declarator for the name being declared
7638 and get it as a string, for an error message. */
7639 for (id_declarator = declarator;
7641 id_declarator = id_declarator->declarator)
7643 if (id_declarator->kind != cdk_id)
7644 innermost_code = id_declarator->kind;
7646 switch (id_declarator->kind)
7649 if (id_declarator->declarator
7650 && id_declarator->declarator->kind == cdk_id)
7652 sfk = id_declarator->declarator->u.id.sfk;
7653 if (sfk == sfk_destructor)
7660 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7661 tree decl = id_declarator->u.id.unqualified_name;
7664 if (qualifying_scope)
7666 if (at_function_scope_p ())
7670 A declarator-id shall not be qualified except
7673 None of the cases are permitted in block
7675 if (qualifying_scope == global_namespace)
7676 error ("invalid use of qualified-name %<::%D%>",
7678 else if (TYPE_P (qualifying_scope))
7679 error ("invalid use of qualified-name %<%T::%D%>",
7680 qualifying_scope, decl);
7682 error ("invalid use of qualified-name %<%D::%D%>",
7683 qualifying_scope, decl);
7684 return error_mark_node;
7686 else if (TYPE_P (qualifying_scope))
7688 ctype = qualifying_scope;
7689 if (innermost_code != cdk_function
7690 && current_class_type
7691 && !UNIQUELY_DERIVED_FROM_P (ctype,
7692 current_class_type))
7694 error ("type %qT is not derived from type %qT",
7695 ctype, current_class_type);
7696 return error_mark_node;
7699 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7700 in_namespace = qualifying_scope;
7702 switch (TREE_CODE (decl))
7708 if (innermost_code != cdk_function)
7710 error ("declaration of %qD as non-function", decl);
7711 return error_mark_node;
7713 else if (!qualifying_scope
7714 && !(current_class_type && at_class_scope_p ()))
7716 error ("declaration of %qD as non-member", decl);
7717 return error_mark_node;
7720 type = TREE_OPERAND (decl, 0);
7722 type = constructor_name (type);
7723 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7728 case TEMPLATE_ID_EXPR:
7730 tree fns = TREE_OPERAND (decl, 0);
7733 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7735 gcc_assert (is_overloaded_fn (dname));
7736 dname = DECL_NAME (get_first_fn (dname));
7741 case IDENTIFIER_NODE:
7742 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7745 if (C_IS_RESERVED_WORD (dname))
7747 error ("declarator-id missing; using reserved word %qD",
7749 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7751 else if (!IDENTIFIER_TYPENAME_P (dname))
7752 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7755 gcc_assert (flags == NO_SPECIAL);
7756 flags = TYPENAME_FLAG;
7757 ctor_return_type = TREE_TYPE (dname);
7758 sfk = sfk_conversion;
7759 if (is_typename_at_global_scope (dname))
7760 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7762 name = "<invalid operator>";
7779 return error_mark_node;
7784 if (id_declarator->kind == cdk_id)
7790 The declarator in a function-definition shall have the form
7791 D1 ( parameter-declaration-clause) ... */
7792 if (funcdef_flag && innermost_code != cdk_function)
7794 error ("function definition does not declare parameters");
7795 return error_mark_node;
7798 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7799 && innermost_code != cdk_function
7800 && ! (ctype && !declspecs->any_specifiers_p))
7802 error ("declaration of %qD as non-function", dname);
7803 return error_mark_node;
7806 /* Anything declared one level down from the top level
7807 must be one of the parameters of a function
7808 (because the body is at least two levels down). */
7810 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7811 by not allowing C++ class definitions to specify their parameters
7812 with xdecls (must be spec.d in the parmlist).
7814 Since we now wait to push a class scope until we are sure that
7815 we are in a legitimate method context, we must set oldcname
7816 explicitly (since current_class_name is not yet alive).
7818 We also want to avoid calling this a PARM if it is in a namespace. */
7820 if (decl_context == NORMAL && !toplevel_bindings_p ())
7822 struct cp_binding_level *b = current_binding_level;
7823 current_binding_level = b->level_chain;
7824 if (current_binding_level != 0 && toplevel_bindings_p ())
7825 decl_context = PARM;
7826 current_binding_level = b;
7830 name = decl_context == PARM ? "parameter" : "type name";
7832 /* If there were multiple types specified in the decl-specifier-seq,
7833 issue an error message. */
7834 if (declspecs->multiple_types_p)
7836 error ("two or more data types in declaration of %qs", name);
7837 return error_mark_node;
7840 if (declspecs->conflicting_specifiers_p)
7842 error ("conflicting specifiers in declaration of %qs", name);
7843 return error_mark_node;
7846 /* Extract the basic type from the decl-specifier-seq. */
7847 type = declspecs->type;
7848 if (type == error_mark_node)
7851 type_was_error_mark_node = true;
7853 /* If the entire declaration is itself tagged as deprecated then
7854 suppress reports of deprecated items. */
7855 if (type && TREE_DEPRECATED (type)
7856 && deprecated_state != DEPRECATED_SUPPRESS)
7857 warn_deprecated_use (type, NULL_TREE);
7858 if (type && TREE_CODE (type) == TYPE_DECL)
7860 typedef_decl = type;
7861 type = TREE_TYPE (typedef_decl);
7862 if (TREE_DEPRECATED (type)
7863 && DECL_ARTIFICIAL (typedef_decl)
7864 && deprecated_state != DEPRECATED_SUPPRESS)
7865 warn_deprecated_use (type, NULL_TREE);
7867 /* No type at all: default to `int', and set DEFAULTED_INT
7868 because it was not a user-defined typedef. */
7869 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7871 /* These imply 'int'. */
7872 type = integer_type_node;
7876 explicit_int = declspecs->explicit_int_p;
7877 explicit_char = declspecs->explicit_char_p;
7880 /* See the code below that used this. */
7882 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7884 typedef_type = type;
7887 if (sfk != sfk_conversion)
7888 ctor_return_type = ctype;
7890 if (sfk != sfk_none)
7891 type = check_special_function_return_type (sfk, type,
7893 else if (type == NULL_TREE)
7899 /* We handle `main' specially here, because 'main () { }' is so
7900 common. With no options, it is allowed. With -Wreturn-type,
7901 it is a warning. It is only an error with -pedantic-errors. */
7902 is_main = (funcdef_flag
7903 && dname && MAIN_NAME_P (dname)
7904 && ctype == NULL_TREE
7905 && in_namespace == NULL_TREE
7906 && current_namespace == global_namespace);
7908 if (type_was_error_mark_node)
7909 /* We've already issued an error, don't complain more. */;
7910 else if (in_system_header || flag_ms_extensions)
7911 /* Allow it, sigh. */;
7913 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7915 pedwarn (input_location, OPT_pedantic,
7916 "ISO C++ forbids declaration of %qs with no type", name);
7918 warning (OPT_Wreturn_type,
7919 "ISO C++ forbids declaration of %qs with no type", name);
7921 type = integer_type_node;
7926 /* Now process the modifiers that were specified
7927 and check for invalid combinations. */
7929 /* Long double is a special combination. */
7930 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7933 type = build_qualified_type (long_double_type_node,
7934 cp_type_quals (type));
7937 /* Check all other uses of type modifiers. */
7939 if (unsigned_p || signed_p || long_p || short_p)
7943 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7944 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7945 else if (signed_p && unsigned_p)
7946 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7947 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7948 error ("%<long long%> invalid for %qs", name);
7949 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7950 error ("%<long%> invalid for %qs", name);
7951 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7952 error ("%<short%> invalid for %qs", name);
7953 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7954 error ("%<long%> or %<short%> invalid for %qs", name);
7955 else if ((long_p || short_p) && explicit_char)
7956 error ("%<long%> or %<short%> specified with char for %qs", name);
7957 else if (long_p && short_p)
7958 error ("%<long%> and %<short%> specified together for %qs", name);
7959 else if (type == char16_type_node || type == char32_type_node)
7961 if (signed_p || unsigned_p)
7962 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7963 else if (short_p || long_p)
7964 error ("%<short%> or %<long%> invalid for %qs", name);
7969 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7971 pedwarn (input_location, OPT_pedantic,
7972 "long, short, signed or unsigned used invalidly for %qs",
7974 if (flag_pedantic_errors)
7979 /* Discard the type modifiers if they are invalid. */
7990 /* Decide whether an integer type is signed or not.
7991 Optionally treat bitfields as signed by default. */
7995 It is implementation-defined whether a plain (neither
7996 explicitly signed or unsigned) char, short, int, or long
7997 bit-field is signed or unsigned.
7999 Naturally, we extend this to long long as well. Note that
8000 this does not include wchar_t. */
8001 || (bitfield && !flag_signed_bitfields
8003 /* A typedef for plain `int' without `signed' can be
8004 controlled just like plain `int', but a typedef for
8005 `signed int' cannot be so controlled. */
8007 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8008 && TREE_CODE (type) == INTEGER_TYPE
8009 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8012 type = long_long_unsigned_type_node;
8014 type = long_unsigned_type_node;
8016 type = short_unsigned_type_node;
8017 else if (type == char_type_node)
8018 type = unsigned_char_type_node;
8019 else if (typedef_decl)
8020 type = unsigned_type_for (type);
8022 type = unsigned_type_node;
8024 else if (signed_p && type == char_type_node)
8025 type = signed_char_type_node;
8027 type = long_long_integer_type_node;
8029 type = long_integer_type_node;
8031 type = short_integer_type_node;
8033 if (declspecs->specs[(int)ds_complex])
8035 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8036 error ("complex invalid for %qs", name);
8037 /* If we just have "complex", it is equivalent to
8038 "complex double", but if any modifiers at all are specified it is
8039 the complex form of TYPE. E.g, "complex short" is
8040 "complex short int". */
8042 else if (defaulted_int && ! longlong
8043 && ! (long_p || short_p || signed_p || unsigned_p))
8044 type = complex_double_type_node;
8045 else if (type == integer_type_node)
8046 type = complex_integer_type_node;
8047 else if (type == float_type_node)
8048 type = complex_float_type_node;
8049 else if (type == double_type_node)
8050 type = complex_double_type_node;
8051 else if (type == long_double_type_node)
8052 type = complex_long_double_type_node;
8054 type = build_complex_type (type);
8057 type_quals = TYPE_UNQUALIFIED;
8058 if (declspecs->specs[(int)ds_const])
8059 type_quals |= TYPE_QUAL_CONST;
8060 if (declspecs->specs[(int)ds_volatile])
8061 type_quals |= TYPE_QUAL_VOLATILE;
8062 if (declspecs->specs[(int)ds_restrict])
8063 type_quals |= TYPE_QUAL_RESTRICT;
8064 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8065 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8068 if (TREE_CODE (type) == FUNCTION_TYPE
8069 && type_quals != TYPE_UNQUALIFIED)
8071 /* This was an error in C++98 (cv-qualifiers cannot be added to
8072 a function type), but DR 295 makes the code well-formed by
8073 dropping the extra qualifiers. */
8076 tree bad_type = build_qualified_type (type, type_quals);
8077 pedwarn (input_location, OPT_pedantic,
8078 "ignoring %qV qualifiers added to function type %qT",
8081 type_quals = TYPE_UNQUALIFIED;
8083 type_quals |= cp_type_quals (type);
8084 type = cp_build_qualified_type_real
8085 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8086 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8087 /* We might have ignored or rejected some of the qualifiers. */
8088 type_quals = cp_type_quals (type);
8091 inlinep = !! declspecs->specs[(int)ds_inline];
8092 virtualp = !! declspecs->specs[(int)ds_virtual];
8093 explicitp = !! declspecs->specs[(int)ds_explicit];
8095 storage_class = declspecs->storage_class;
8096 if (storage_class == sc_static)
8097 staticp = 1 + (decl_context == FIELD);
8099 if (virtualp && staticp == 2)
8101 error ("member %qD cannot be declared both virtual and static", dname);
8102 storage_class = sc_none;
8105 friendp = !! declspecs->specs[(int)ds_friend];
8107 if (dependent_name && !friendp)
8109 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8110 return error_mark_node;
8113 /* Issue errors about use of storage classes for parameters. */
8114 if (decl_context == PARM)
8116 if (declspecs->specs[(int)ds_typedef])
8118 error ("typedef declaration invalid in parameter declaration");
8119 return error_mark_node;
8121 else if (storage_class == sc_static
8122 || storage_class == sc_extern
8124 error ("storage class specifiers invalid in parameter declarations");
8126 if (type_uses_auto (type))
8128 error ("parameter declared %<auto%>");
8129 type = error_mark_node;
8133 /* Give error if `virtual' is used outside of class declaration. */
8135 && (current_class_name == NULL_TREE || decl_context != FIELD))
8137 error ("%<virtual%> outside class declaration");
8141 /* Static anonymous unions are dealt with here. */
8142 if (staticp && decl_context == TYPENAME
8144 && ANON_AGGR_TYPE_P (declspecs->type))
8145 decl_context = FIELD;
8147 /* Warn about storage classes that are invalid for certain
8148 kinds of declarations (parameters, typenames, etc.). */
8151 && storage_class != sc_extern
8152 && storage_class != sc_static)
8153 || declspecs->specs[(int)ds_typedef]))
8155 error ("multiple storage classes in declaration of %qs", name);
8158 if (decl_context != NORMAL
8159 && ((storage_class != sc_none
8160 && storage_class != sc_mutable)
8163 if ((decl_context == PARM || decl_context == CATCHPARM)
8164 && (storage_class == sc_register
8165 || storage_class == sc_auto))
8167 else if (declspecs->specs[(int)ds_typedef])
8169 else if (decl_context == FIELD
8170 /* C++ allows static class elements. */
8171 && storage_class == sc_static)
8172 /* C++ also allows inlines and signed and unsigned elements,
8173 but in those cases we don't come in here. */
8177 if (decl_context == FIELD)
8178 error ("storage class specified for %qs", name);
8181 if (decl_context == PARM || decl_context == CATCHPARM)
8182 error ("storage class specified for parameter %qs", name);
8184 error ("storage class specified for typename");
8186 if (storage_class == sc_register
8187 || storage_class == sc_auto
8188 || storage_class == sc_extern
8190 storage_class = sc_none;
8193 else if (storage_class == sc_extern && funcdef_flag
8194 && ! toplevel_bindings_p ())
8195 error ("nested function %qs declared %<extern%>", name);
8196 else if (toplevel_bindings_p ())
8198 if (storage_class == sc_auto)
8199 error ("top-level declaration of %qs specifies %<auto%>", name);
8202 && storage_class != sc_extern
8203 && storage_class != sc_static)
8205 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8210 if (storage_class && friendp)
8212 error ("storage class specifiers invalid in friend function declarations");
8213 storage_class = sc_none;
8218 unqualified_id = NULL_TREE;
8221 unqualified_id = id_declarator->u.id.unqualified_name;
8222 switch (TREE_CODE (unqualified_id))
8225 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8226 if (TYPE_P (unqualified_id))
8227 unqualified_id = constructor_name (unqualified_id);
8230 case IDENTIFIER_NODE:
8231 case TEMPLATE_ID_EXPR:
8239 /* Determine the type of the entity declared by recurring on the
8241 for (; declarator; declarator = declarator->declarator)
8243 const cp_declarator *inner_declarator;
8246 if (type == error_mark_node)
8247 return error_mark_node;
8249 attrs = declarator->attributes;
8255 if (declarator == NULL || declarator->kind == cdk_id)
8256 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8257 if (declarator->kind == cdk_function)
8258 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8259 if (declarator->kind == cdk_array)
8260 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8261 returned_attrs = decl_attributes (&type,
8262 chainon (returned_attrs, attrs),
8266 if (declarator->kind == cdk_id)
8269 inner_declarator = declarator->declarator;
8271 switch (declarator->kind)
8274 type = create_array_type_for_decl (dname, type,
8275 declarator->u.array.bounds);
8283 /* Declaring a function type.
8284 Make sure we have a valid type for the function to return. */
8286 if (type_quals != TYPE_UNQUALIFIED)
8288 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8289 warning (OPT_Wignored_qualifiers,
8290 "type qualifiers ignored on function return type");
8291 /* We now know that the TYPE_QUALS don't apply to the
8292 decl, but to its return type. */
8293 type_quals = TYPE_UNQUALIFIED;
8294 set_no_warning = true;
8296 errmsg = targetm.invalid_return_type (type);
8300 type = integer_type_node;
8303 /* Error about some types functions can't return. */
8305 if (TREE_CODE (type) == FUNCTION_TYPE)
8307 error ("%qs declared as function returning a function", name);
8308 return error_mark_node;
8310 if (TREE_CODE (type) == ARRAY_TYPE)
8312 error ("%qs declared as function returning an array", name);
8313 return error_mark_node;
8316 /* Pick up type qualifiers which should be applied to `this'. */
8317 memfn_quals = declarator->u.function.qualifiers;
8319 /* Pick up the exception specifications. */
8320 raises = declarator->u.function.exception_specification;
8322 /* Say it's a definition only for the CALL_EXPR
8323 closest to the identifier. */
8324 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8326 /* Handle a late-specified return type. */
8329 if (type_uses_auto (type))
8331 if (!declarator->u.function.late_return_type)
8333 error ("%qs function uses %<auto%> type specifier without"
8334 " late return type", name);
8335 return error_mark_node;
8337 else if (!is_auto (type))
8339 error ("%qs function with late return type has"
8340 " %qT as its type rather than plain %<auto%>",
8342 return error_mark_node;
8345 else if (declarator->u.function.late_return_type)
8347 error ("%qs function with late return type not declared"
8348 " with %<auto%> type specifier", name);
8349 return error_mark_node;
8352 type = splice_late_return_type
8353 (type, declarator->u.function.late_return_type);
8354 if (type == error_mark_node)
8355 return error_mark_node;
8357 if (ctype == NULL_TREE
8358 && decl_context == FIELD
8360 && (friendp == 0 || dname == current_class_name))
8361 ctype = current_class_type;
8363 if (ctype && (sfk == sfk_constructor
8364 || sfk == sfk_destructor))
8366 /* We are within a class's scope. If our declarator name
8367 is the same as the class name, and we are defining
8368 a function, then it is a constructor/destructor, and
8369 therefore returns a void type. */
8371 /* ISO C++ 12.4/2. A destructor may not be declared
8372 const or volatile. A destructor may not be
8375 ISO C++ 12.1. A constructor may not be declared
8376 const or volatile. A constructor may not be
8377 virtual. A constructor may not be static. */
8379 error ((flags == DTOR_FLAG)
8380 ? "destructor cannot be static member function"
8381 : "constructor cannot be static member function");
8384 error ((flags == DTOR_FLAG)
8385 ? "destructors may not be cv-qualified"
8386 : "constructors may not be cv-qualified");
8387 memfn_quals = TYPE_UNQUALIFIED;
8390 if (decl_context == FIELD
8391 && !member_function_or_else (ctype,
8394 return error_mark_node;
8396 if (flags != DTOR_FLAG)
8398 /* It's a constructor. */
8403 permerror (input_location, "constructors cannot be declared virtual");
8406 if (decl_context == FIELD
8407 && sfk != sfk_constructor)
8408 return error_mark_node;
8410 if (decl_context == FIELD)
8416 error ("can't initialize friend function %qs", name);
8419 /* Cannot be both friend and virtual. */
8420 error ("virtual functions cannot be friends");
8423 if (decl_context == NORMAL)
8424 error ("friend declaration not in class definition");
8425 if (current_function_decl && funcdef_flag)
8426 error ("can't define friend function %qs in a local "
8430 else if (ctype && sfk == sfk_conversion)
8434 maybe_warn_cpp0x ("explicit conversion operators");
8439 arg_types = grokparms (declarator->u.function.parameters,
8442 if (inner_declarator
8443 && inner_declarator->kind == cdk_id
8444 && inner_declarator->u.id.sfk == sfk_destructor
8445 && arg_types != void_list_node)
8447 error ("destructors may not have parameters");
8448 arg_types = void_list_node;
8452 type = build_function_type (type, arg_types);
8459 /* Filter out pointers-to-references and references-to-references.
8460 We can get these if a TYPE_DECL is used. */
8462 if (TREE_CODE (type) == REFERENCE_TYPE)
8464 if (declarator->kind != cdk_reference)
8466 error ("cannot declare pointer to %q#T", type);
8467 type = TREE_TYPE (type);
8470 /* In C++0x, we allow reference to reference declarations
8471 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8472 and template type arguments [14.3.1/4 temp.arg.type]. The
8473 check for direct reference to reference declarations, which
8474 are still forbidden, occurs below. Reasoning behind the change
8475 can be found in DR106, DR540, and the rvalue reference
8477 else if (cxx_dialect == cxx98)
8479 error ("cannot declare reference to %q#T", type);
8480 type = TREE_TYPE (type);
8483 else if (VOID_TYPE_P (type))
8485 if (declarator->kind == cdk_reference)
8486 error ("cannot declare reference to %q#T", type);
8487 else if (declarator->kind == cdk_ptrmem)
8488 error ("cannot declare pointer to %q#T member", type);
8491 /* We now know that the TYPE_QUALS don't apply to the decl,
8492 but to the target of the pointer. */
8493 type_quals = TYPE_UNQUALIFIED;
8495 if (declarator->kind == cdk_ptrmem
8496 && (TREE_CODE (type) == FUNCTION_TYPE
8497 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8499 memfn_quals |= cp_type_quals (type);
8500 type = build_memfn_type (type,
8501 declarator->u.pointer.class_type,
8503 memfn_quals = TYPE_UNQUALIFIED;
8506 if (TREE_CODE (type) == FUNCTION_TYPE
8507 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8508 error ("cannot declare %s to qualified function type %qT",
8509 declarator->kind == cdk_reference ? "reference" : "pointer",
8512 if (declarator->kind == cdk_reference)
8514 /* In C++0x, the type we are creating a reference to might be
8515 a typedef which is itself a reference type. In that case,
8516 we follow the reference collapsing rules in
8517 [7.1.3/8 dcl.typedef] to create the final reference type:
8519 "If a typedef TD names a type that is a reference to a type
8520 T, an attempt to create the type 'lvalue reference to cv TD'
8521 creates the type 'lvalue reference to T,' while an attempt
8522 to create the type "rvalue reference to cv TD' creates the
8525 if (!VOID_TYPE_P (type))
8526 type = cp_build_reference_type
8527 ((TREE_CODE (type) == REFERENCE_TYPE
8528 ? TREE_TYPE (type) : type),
8529 (declarator->u.reference.rvalue_ref
8530 && (TREE_CODE(type) != REFERENCE_TYPE
8531 || TYPE_REF_IS_RVALUE (type))));
8533 /* In C++0x, we need this check for direct reference to
8534 reference declarations, which are forbidden by
8535 [8.3.2/5 dcl.ref]. Reference to reference declarations
8536 are only allowed indirectly through typedefs and template
8537 type arguments. Example:
8539 void foo(int & &); // invalid ref-to-ref decl
8541 typedef int & int_ref;
8542 void foo(int_ref &); // valid ref-to-ref decl
8544 if (inner_declarator && inner_declarator->kind == cdk_reference)
8545 error ("cannot declare reference to %q#T, which is not "
8546 "a typedef or a template type argument", type);
8548 else if (TREE_CODE (type) == METHOD_TYPE)
8549 type = build_ptrmemfunc_type (build_pointer_type (type));
8550 else if (declarator->kind == cdk_ptrmem)
8552 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8554 if (declarator->u.pointer.class_type == error_mark_node)
8555 /* We will already have complained. */
8556 type = error_mark_node;
8558 type = build_ptrmem_type (declarator->u.pointer.class_type,
8562 type = build_pointer_type (type);
8564 /* Process a list of type modifier keywords (such as
8565 const or volatile) that were given inside the `*' or `&'. */
8567 if (declarator->u.pointer.qualifiers)
8570 = cp_build_qualified_type (type,
8571 declarator->u.pointer.qualifiers);
8572 type_quals = cp_type_quals (type);
8585 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8586 && TREE_CODE (type) != FUNCTION_TYPE
8587 && TREE_CODE (type) != METHOD_TYPE)
8589 error ("template-id %qD used as a declarator",
8591 unqualified_id = dname;
8594 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8595 qualified with a class-name, turn it into a METHOD_TYPE, unless
8596 we know that the function is static. We take advantage of this
8597 opportunity to do other processing that pertains to entities
8598 explicitly declared to be class members. Note that if DECLARATOR
8599 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8600 would not have exited the loop above. */
8602 && declarator->u.id.qualifying_scope
8603 && TYPE_P (declarator->u.id.qualifying_scope))
8607 ctype = declarator->u.id.qualifying_scope;
8608 ctype = TYPE_MAIN_VARIANT (ctype);
8610 while (t != NULL_TREE && CLASS_TYPE_P (t))
8612 /* You're supposed to have one `template <...>' for every
8613 template class, but you don't need one for a full
8614 specialization. For example:
8616 template <class T> struct S{};
8617 template <> struct S<int> { void f(); };
8618 void S<int>::f () {}
8620 is correct; there shouldn't be a `template <>' for the
8621 definition of `S<int>::f'. */
8622 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8623 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8624 /* T is an explicit (not partial) specialization. All
8625 containing classes must therefore also be explicitly
8628 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8629 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8630 template_count += 1;
8632 t = TYPE_MAIN_DECL (t);
8633 t = DECL_CONTEXT (t);
8636 if (ctype == current_class_type)
8640 permerror (input_location, "member functions are implicitly friends of their class");
8644 permerror (declarator->id_loc,
8645 "extra qualification %<%T::%> on member %qs",
8648 else if (/* If the qualifying type is already complete, then we
8649 can skip the following checks. */
8650 !COMPLETE_TYPE_P (ctype)
8651 && (/* If the function is being defined, then
8652 qualifying type must certainly be complete. */
8654 /* A friend declaration of "T::f" is OK, even if
8655 "T" is a template parameter. But, if this
8656 function is not a friend, the qualifying type
8658 || (!friendp && !CLASS_TYPE_P (ctype))
8659 /* For a declaration, the type need not be
8660 complete, if either it is dependent (since there
8661 is no meaningful definition of complete in that
8662 case) or the qualifying class is currently being
8664 || !(dependent_type_p (ctype)
8665 || currently_open_class (ctype)))
8666 /* Check that the qualifying type is complete. */
8667 && !complete_type_or_else (ctype, NULL_TREE))
8668 return error_mark_node;
8669 else if (TREE_CODE (type) == FUNCTION_TYPE)
8671 tree sname = declarator->u.id.unqualified_name;
8673 if (current_class_type
8674 && (!friendp || funcdef_flag))
8677 ? "cannot define member function %<%T::%s%> within %<%T%>"
8678 : "cannot declare member function %<%T::%s%> within %<%T%>",
8679 ctype, name, current_class_type);
8680 return error_mark_node;
8683 if (TREE_CODE (sname) == IDENTIFIER_NODE
8684 && NEW_DELETE_OPNAME_P (sname))
8685 /* Overloaded operator new and operator delete
8686 are always static functions. */
8689 type = build_memfn_type (type, ctype, memfn_quals);
8691 else if (declspecs->specs[(int)ds_typedef]
8692 && current_class_type)
8694 error ("cannot declare member %<%T::%s%> within %qT",
8695 ctype, name, current_class_type);
8696 return error_mark_node;
8700 /* Now TYPE has the actual type. */
8705 *attrlist = chainon (returned_attrs, *attrlist);
8707 attrlist = &returned_attrs;
8710 /* Handle parameter packs. */
8711 if (parameter_pack_p)
8713 if (decl_context == PARM)
8714 /* Turn the type into a pack expansion.*/
8715 type = make_pack_expansion (type);
8717 error ("non-parameter %qs cannot be a parameter pack", name);
8720 /* Did array size calculations overflow? */
8722 if (TREE_CODE (type) == ARRAY_TYPE
8723 && COMPLETE_TYPE_P (type)
8724 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8725 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8727 error ("size of array %qs is too large", name);
8728 /* If we proceed with the array type as it is, we'll eventually
8729 crash in tree_low_cst(). */
8730 type = error_mark_node;
8733 if ((decl_context == FIELD || decl_context == PARM)
8734 && !processing_template_decl
8735 && variably_modified_type_p (type, NULL_TREE))
8737 if (decl_context == FIELD)
8738 error ("data member may not have variably modified type %qT", type);
8740 error ("parameter may not have variably modified type %qT", type);
8741 type = error_mark_node;
8744 if (explicitp == 1 || (explicitp && friendp))
8746 /* [dcl.fct.spec] The explicit specifier shall only be used in
8747 declarations of constructors within a class definition. */
8748 error ("only declarations of constructors can be %<explicit%>");
8752 if (storage_class == sc_mutable)
8754 if (decl_context != FIELD || friendp)
8756 error ("non-member %qs cannot be declared %<mutable%>", name);
8757 storage_class = sc_none;
8759 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8761 error ("non-object member %qs cannot be declared %<mutable%>", name);
8762 storage_class = sc_none;
8764 else if (TREE_CODE (type) == FUNCTION_TYPE
8765 || TREE_CODE (type) == METHOD_TYPE)
8767 error ("function %qs cannot be declared %<mutable%>", name);
8768 storage_class = sc_none;
8772 error ("static %qs cannot be declared %<mutable%>", name);
8773 storage_class = sc_none;
8775 else if (type_quals & TYPE_QUAL_CONST)
8777 error ("const %qs cannot be declared %<mutable%>", name);
8778 storage_class = sc_none;
8782 /* If this is declaring a typedef name, return a TYPE_DECL. */
8783 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8787 /* Note that the grammar rejects storage classes
8788 in typenames, fields or parameters. */
8789 if (current_lang_name == lang_name_java)
8790 TYPE_FOR_JAVA (type) = 1;
8792 /* This declaration:
8794 typedef void f(int) const;
8796 declares a function type which is not a member of any
8797 particular class, but which is cv-qualified; for
8798 example "f S::*" declares a pointer to a const-qualified
8799 member function of S. We record the cv-qualification in the
8801 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8803 type = cp_build_qualified_type (type, memfn_quals);
8805 /* We have now dealt with these qualifiers. */
8806 memfn_quals = TYPE_UNQUALIFIED;
8809 if (decl_context == FIELD)
8810 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8812 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8813 if (id_declarator && declarator->u.id.qualifying_scope) {
8814 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8815 TREE_TYPE (decl) = error_mark_node;
8818 if (decl_context != FIELD)
8820 if (!current_function_decl)
8821 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8822 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8823 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8824 (current_function_decl)))
8825 /* The TYPE_DECL is "abstract" because there will be
8826 clones of this constructor/destructor, and there will
8827 be copies of this TYPE_DECL generated in those
8829 DECL_ABSTRACT (decl) = 1;
8831 else if (constructor_name_p (unqualified_id, current_class_type))
8832 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8833 "as enclosing class",
8836 /* If the user declares "typedef struct {...} foo" then the
8837 struct will have an anonymous name. Fill that name in now.
8838 Nothing can refer to it, so nothing needs know about the name
8840 if (type != error_mark_node
8843 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8844 && TYPE_ANONYMOUS_P (type)
8845 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8849 /* Replace the anonymous name with the real name everywhere. */
8850 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8852 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8854 debug_hooks->set_name (t, decl);
8855 TYPE_NAME (t) = decl;
8859 if (TYPE_LANG_SPECIFIC (type))
8860 TYPE_WAS_ANONYMOUS (type) = 1;
8862 /* If this is a typedef within a template class, the nested
8863 type is a (non-primary) template. The name for the
8864 template needs updating as well. */
8865 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8866 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8867 = TYPE_IDENTIFIER (type);
8869 /* FIXME remangle member functions; member functions of a
8870 type with external linkage have external linkage. */
8874 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8875 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8877 bad_specifiers (decl, "type", virtualp,
8878 memfn_quals != TYPE_UNQUALIFIED,
8879 inlinep, friendp, raises != NULL_TREE);
8884 /* Detect the case of an array type of unspecified size
8885 which came, as such, direct from a typedef name.
8886 We must copy the type, so that the array's domain can be
8887 individually set by the object's initializer. */
8889 if (type && typedef_type
8890 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8891 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8892 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8894 /* Detect where we're using a typedef of function type to declare a
8895 function. PARMS will not be set, so we must create it now. */
8897 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8899 tree decls = NULL_TREE;
8902 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8904 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8906 TREE_CHAIN (decl) = decls;
8910 parms = nreverse (decls);
8912 if (decl_context != TYPENAME)
8914 /* A cv-qualifier-seq shall only be part of the function type
8915 for a non-static member function. [8.3.5/4 dcl.fct] */
8916 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8917 && (current_class_type == NULL_TREE || staticp) )
8920 ? G_("qualified function types cannot be used to "
8921 "declare static member functions")
8922 : G_("qualified function types cannot be used to "
8923 "declare free functions"));
8924 type = TYPE_MAIN_VARIANT (type);
8927 /* The qualifiers on the function type become the qualifiers on
8928 the non-static member function. */
8929 memfn_quals |= cp_type_quals (type);
8933 /* If this is a type name (such as, in a cast or sizeof),
8934 compute the type and return it now. */
8936 if (decl_context == TYPENAME)
8938 /* Note that the grammar rejects storage classes
8939 in typenames, fields or parameters. */
8940 if (type_quals != TYPE_UNQUALIFIED)
8941 type_quals = TYPE_UNQUALIFIED;
8943 /* Special case: "friend class foo" looks like a TYPENAME context. */
8946 if (type_quals != TYPE_UNQUALIFIED)
8948 error ("type qualifiers specified for friend class declaration");
8949 type_quals = TYPE_UNQUALIFIED;
8953 error ("%<inline%> specified for friend class declaration");
8959 /* Don't allow friend declaration without a class-key. */
8960 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8961 permerror (input_location, "template parameters cannot be friends");
8962 else if (TREE_CODE (type) == TYPENAME_TYPE)
8963 permerror (input_location, "friend declaration requires class-key, "
8964 "i.e. %<friend class %T::%D%>",
8965 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8967 permerror (input_location, "friend declaration requires class-key, "
8968 "i.e. %<friend %#T%>",
8972 /* Only try to do this stuff if we didn't already give up. */
8973 if (type != integer_type_node)
8975 /* A friendly class? */
8976 if (current_class_type)
8977 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8980 error ("trying to make class %qT a friend of global scope",
8983 type = void_type_node;
8986 else if (memfn_quals)
8988 if (ctype == NULL_TREE
8989 && TREE_CODE (type) == METHOD_TYPE)
8990 ctype = TYPE_METHOD_BASETYPE (type);
8993 type = build_memfn_type (type, ctype, memfn_quals);
8994 /* Core issue #547: need to allow this in template type args. */
8995 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8996 type = cp_build_qualified_type (type, memfn_quals);
8998 error ("invalid qualifiers on non-member function type");
9003 else if (unqualified_id == NULL_TREE && decl_context != PARM
9004 && decl_context != CATCHPARM
9005 && TREE_CODE (type) != UNION_TYPE
9008 error ("abstract declarator %qT used as declaration", type);
9009 return error_mark_node;
9012 /* Only functions may be declared using an operator-function-id. */
9014 && IDENTIFIER_OPNAME_P (unqualified_id)
9015 && TREE_CODE (type) != FUNCTION_TYPE
9016 && TREE_CODE (type) != METHOD_TYPE)
9018 error ("declaration of %qD as non-function", unqualified_id);
9019 return error_mark_node;
9022 /* We don't check parameter types here because we can emit a better
9023 error message later. */
9024 if (decl_context != PARM)
9026 type = check_var_type (unqualified_id, type);
9027 if (type == error_mark_node)
9028 return error_mark_node;
9031 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9032 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9034 if (decl_context == PARM || decl_context == CATCHPARM)
9036 if (ctype || in_namespace)
9037 error ("cannot use %<::%> in parameter declaration");
9039 /* A parameter declared as an array of T is really a pointer to T.
9040 One declared as a function is really a pointer to a function.
9041 One declared as a member is really a pointer to member. */
9043 if (TREE_CODE (type) == ARRAY_TYPE)
9045 /* Transfer const-ness of array into that of type pointed to. */
9046 type = build_pointer_type (TREE_TYPE (type));
9047 type_quals = TYPE_UNQUALIFIED;
9049 else if (TREE_CODE (type) == FUNCTION_TYPE)
9050 type = build_pointer_type (type);
9056 if (decl_context == PARM)
9058 decl = cp_build_parm_decl (unqualified_id, type);
9060 bad_specifiers (decl, "parameter", virtualp,
9061 memfn_quals != TYPE_UNQUALIFIED,
9062 inlinep, friendp, raises != NULL_TREE);
9064 else if (decl_context == FIELD)
9066 /* The C99 flexible array extension. */
9067 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9068 && TYPE_DOMAIN (type) == NULL_TREE)
9070 tree itype = compute_array_index_type (dname, integer_zero_node);
9071 type = build_cplus_array_type (TREE_TYPE (type), itype);
9074 if (type == error_mark_node)
9076 /* Happens when declaring arrays of sizes which
9077 are error_mark_node, for example. */
9080 else if (in_namespace && !friendp)
9082 /* Something like struct S { int N::j; }; */
9083 error ("invalid use of %<::%>");
9084 return error_mark_node;
9086 else if (TREE_CODE (type) == FUNCTION_TYPE)
9089 tree function_context;
9093 if (ctype == NULL_TREE)
9094 ctype = current_class_type;
9096 if (ctype == NULL_TREE)
9098 error ("can't make %qD into a method -- not in a class",
9100 return error_mark_node;
9103 /* ``A union may [ ... ] not [ have ] virtual functions.''
9105 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9107 error ("function %qD declared virtual inside a union",
9109 return error_mark_node;
9112 if (NEW_DELETE_OPNAME_P (unqualified_id))
9116 error ("%qD cannot be declared virtual, since it "
9122 else if (staticp < 2)
9123 type = build_memfn_type (type, ctype, memfn_quals);
9126 /* Check that the name used for a destructor makes sense. */
9127 if (sfk == sfk_destructor)
9129 tree uqname = id_declarator->u.id.unqualified_name;
9133 gcc_assert (friendp);
9134 error ("expected qualified name in friend declaration "
9135 "for destructor %qD", uqname);
9136 return error_mark_node;
9139 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9141 error ("declaration of %qD as member of %qT",
9143 return error_mark_node;
9146 else if (sfk == sfk_constructor && friendp)
9148 error ("expected qualified name in friend declaration "
9149 "for constructor %qD",
9150 id_declarator->u.id.unqualified_name);
9151 return error_mark_node;
9154 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9155 function_context = (ctype != NULL_TREE) ?
9156 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9157 publicp = (! friendp || ! staticp)
9158 && function_context == NULL_TREE;
9159 decl = grokfndecl (ctype, type,
9160 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9161 ? unqualified_id : dname,
9164 virtualp, flags, memfn_quals, raises,
9165 friendp ? -1 : 0, friendp, publicp, inlinep,
9167 funcdef_flag, template_count, in_namespace,
9168 attrlist, declarator->id_loc);
9169 if (decl == NULL_TREE)
9170 return error_mark_node;
9172 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9173 /* The decl and setting of decl_attr is also turned off. */
9174 decl = build_decl_attribute_variant (decl, decl_attr);
9177 /* [class.conv.ctor]
9179 A constructor declared without the function-specifier
9180 explicit that can be called with a single parameter
9181 specifies a conversion from the type of its first
9182 parameter to the type of its class. Such a constructor
9183 is called a converting constructor. */
9185 DECL_NONCONVERTING_P (decl) = 1;
9187 else if (TREE_CODE (type) == METHOD_TYPE)
9189 /* We only get here for friend declarations of
9190 members of other classes. */
9191 /* All method decls are public, so tell grokfndecl to set
9192 TREE_PUBLIC, also. */
9193 decl = grokfndecl (ctype, type,
9194 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9195 ? unqualified_id : dname,
9198 virtualp, flags, memfn_quals, raises,
9199 friendp ? -1 : 0, friendp, 1, 0, sfk,
9200 funcdef_flag, template_count, in_namespace,
9202 declarator->id_loc);
9203 if (decl == NULL_TREE)
9204 return error_mark_node;
9206 else if (!staticp && !dependent_type_p (type)
9207 && !COMPLETE_TYPE_P (complete_type (type))
9208 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9211 error ("field %qD has incomplete type", unqualified_id);
9213 error ("name %qT has incomplete type", type);
9215 /* If we're instantiating a template, tell them which
9216 instantiation made the field's type be incomplete. */
9217 if (current_class_type
9218 && TYPE_NAME (current_class_type)
9219 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9221 && declspecs->type == type)
9222 error (" in instantiation of template %qT",
9223 current_class_type);
9225 return error_mark_node;
9231 error ("%qE is neither function nor member function; "
9232 "cannot be declared friend", unqualified_id);
9240 /* Friends are treated specially. */
9241 if (ctype == current_class_type)
9242 ; /* We already issued a permerror. */
9243 else if (decl && DECL_NAME (decl))
9245 if (template_class_depth (current_class_type) == 0)
9247 decl = check_explicit_specialization
9248 (unqualified_id, decl, template_count,
9249 2 * funcdef_flag + 4);
9250 if (decl == error_mark_node)
9251 return error_mark_node;
9254 decl = do_friend (ctype, unqualified_id, decl,
9260 return error_mark_node;
9263 /* Structure field. It may not be a function, except for C++. */
9265 if (decl == NULL_TREE)
9271 /* An attempt is being made to initialize a non-static
9272 member. But, from [class.mem]:
9274 4 A member-declarator can contain a
9275 constant-initializer only if it declares a static
9276 member (_class.static_) of integral or enumeration
9277 type, see _class.static.data_.
9279 This used to be relatively common practice, but
9280 the rest of the compiler does not correctly
9281 handle the initialization unless the member is
9282 static so we make it static below. */
9283 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9285 permerror (input_location, "making %qD static", unqualified_id);
9289 if (uses_template_parms (type))
9290 /* We'll check at instantiation time. */
9292 else if (check_static_variable_definition (unqualified_id,
9294 /* If we just return the declaration, crashes
9295 will sometimes occur. We therefore return
9296 void_type_node, as if this was a friend
9297 declaration, to cause callers to completely
9298 ignore this declaration. */
9299 return error_mark_node;
9304 /* C++ allows static class members. All other work
9305 for this is done by grokfield. */
9306 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9307 set_linkage_for_static_data_member (decl);
9308 /* Even if there is an in-class initialization, DECL
9309 is considered undefined until an out-of-class
9310 definition is provided. */
9311 DECL_EXTERNAL (decl) = 1;
9314 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9318 decl = build_decl (input_location,
9319 FIELD_DECL, unqualified_id, type);
9320 DECL_NONADDRESSABLE_P (decl) = bitfield;
9321 if (bitfield && !unqualified_id)
9322 TREE_NO_WARNING (decl) = 1;
9324 if (storage_class == sc_mutable)
9326 DECL_MUTABLE_P (decl) = 1;
9327 storage_class = sc_none;
9331 bad_specifiers (decl, "field", virtualp,
9332 memfn_quals != TYPE_UNQUALIFIED,
9333 inlinep, friendp, raises != NULL_TREE);
9336 else if (TREE_CODE (type) == FUNCTION_TYPE
9337 || TREE_CODE (type) == METHOD_TYPE)
9342 if (!unqualified_id)
9343 return error_mark_node;
9345 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9346 original_name = dname;
9348 original_name = unqualified_id;
9350 if (storage_class == sc_auto)
9351 error ("storage class %<auto%> invalid for function %qs", name);
9352 else if (storage_class == sc_register)
9353 error ("storage class %<register%> invalid for function %qs", name);
9355 error ("storage class %<__thread%> invalid for function %qs", name);
9357 /* Function declaration not at top level.
9358 Storage classes other than `extern' are not allowed
9359 and `extern' makes no difference. */
9360 if (! toplevel_bindings_p ()
9361 && (storage_class == sc_static
9362 || declspecs->specs[(int)ds_inline])
9365 if (storage_class == sc_static)
9366 pedwarn (input_location, OPT_pedantic,
9367 "%<static%> specified invalid for function %qs "
9368 "declared out of global scope", name);
9370 pedwarn (input_location, OPT_pedantic,
9371 "%<inline%> specifier invalid for function %qs "
9372 "declared out of global scope", name);
9375 if (ctype != NULL_TREE
9376 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9378 error ("%q#T is not a class or a namespace", ctype);
9382 if (ctype == NULL_TREE)
9386 error ("virtual non-class function %qs", name);
9389 else if (sfk == sfk_constructor
9390 || sfk == sfk_destructor)
9393 ? "%qs defined in a non-class scope"
9394 : "%qs declared in a non-class scope", name);
9398 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9399 && !NEW_DELETE_OPNAME_P (original_name))
9400 type = build_method_type_directly (ctype,
9402 TYPE_ARG_TYPES (type));
9404 /* Record presence of `static'. */
9405 publicp = (ctype != NULL_TREE
9406 || storage_class == sc_extern
9407 || storage_class != sc_static);
9409 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9410 virtualp, flags, memfn_quals, raises,
9412 publicp, inlinep, sfk, funcdef_flag,
9413 template_count, in_namespace, attrlist,
9414 declarator->id_loc);
9415 if (decl == NULL_TREE)
9416 return error_mark_node;
9420 int invalid_static = 0;
9422 /* Don't allow a static member function in a class, and forbid
9423 declaring main to be static. */
9424 if (TREE_CODE (type) == METHOD_TYPE)
9426 permerror (input_location, "cannot declare member function %qD to have "
9427 "static linkage", decl);
9430 else if (current_function_decl)
9432 /* FIXME need arm citation */
9433 error ("cannot declare static function inside another function");
9440 storage_class = sc_none;
9446 /* It's a variable. */
9448 /* An uninitialized decl with `extern' is a reference. */
9449 decl = grokvardecl (type, unqualified_id,
9452 (type_quals & TYPE_QUAL_CONST) != 0,
9453 ctype ? ctype : in_namespace);
9454 bad_specifiers (decl, "variable", virtualp,
9455 memfn_quals != TYPE_UNQUALIFIED,
9456 inlinep, friendp, raises != NULL_TREE);
9460 DECL_CONTEXT (decl) = ctype;
9463 permerror (input_location, "%<static%> may not be used when defining "
9464 "(as opposed to declaring) a static data member");
9466 storage_class = sc_none;
9468 if (storage_class == sc_register && TREE_STATIC (decl))
9470 error ("static member %qD declared %<register%>", decl);
9471 storage_class = sc_none;
9473 if (storage_class == sc_extern && pedantic)
9475 pedwarn (input_location, OPT_pedantic,
9476 "cannot explicitly declare member %q#D to have "
9477 "extern linkage", decl);
9478 storage_class = sc_none;
9483 if (storage_class == sc_extern && initialized && !funcdef_flag)
9485 if (toplevel_bindings_p ())
9487 /* It's common practice (and completely valid) to have a const
9488 be initialized and declared extern. */
9489 if (!(type_quals & TYPE_QUAL_CONST))
9490 warning (0, "%qs initialized and declared %<extern%>", name);
9494 error ("%qs has both %<extern%> and initializer", name);
9495 return error_mark_node;
9499 /* Record `register' declaration for warnings on &
9500 and in case doing stupid register allocation. */
9502 if (storage_class == sc_register)
9503 DECL_REGISTER (decl) = 1;
9504 else if (storage_class == sc_extern)
9505 DECL_THIS_EXTERN (decl) = 1;
9506 else if (storage_class == sc_static)
9507 DECL_THIS_STATIC (decl) = 1;
9509 /* Record constancy and volatility on the DECL itself . There's
9510 no need to do this when processing a template; we'll do this
9511 for the instantiated declaration based on the type of DECL. */
9512 if (!processing_template_decl)
9513 cp_apply_type_quals_to_decl (type_quals, decl);
9516 TREE_NO_WARNING (decl) = 1;
9522 /* Subroutine of start_function. Ensure that each of the parameter
9523 types (as listed in PARMS) is complete, as is required for a
9524 function definition. */
9527 require_complete_types_for_parms (tree parms)
9529 for (; parms; parms = TREE_CHAIN (parms))
9531 if (dependent_type_p (TREE_TYPE (parms)))
9533 if (!VOID_TYPE_P (TREE_TYPE (parms))
9534 && complete_type_or_else (TREE_TYPE (parms), parms))
9536 relayout_decl (parms);
9537 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9540 /* grokparms or complete_type_or_else will have already issued
9542 TREE_TYPE (parms) = error_mark_node;
9546 /* Returns nonzero if T is a local variable. */
9549 local_variable_p (const_tree t)
9551 if ((TREE_CODE (t) == VAR_DECL
9552 /* A VAR_DECL with a context that is a _TYPE is a static data
9554 && !TYPE_P (CP_DECL_CONTEXT (t))
9555 /* Any other non-local variable must be at namespace scope. */
9556 && !DECL_NAMESPACE_SCOPE_P (t))
9557 || (TREE_CODE (t) == PARM_DECL))
9563 /* Like local_variable_p, but suitable for use as a tree-walking
9567 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9568 void *data ATTRIBUTE_UNUSED)
9570 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9572 else if (TYPE_P (*tp))
9579 /* Check that ARG, which is a default-argument expression for a
9580 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9581 something goes wrong. DECL may also be a _TYPE node, rather than a
9582 DECL, if there is no DECL available. */
9585 check_default_argument (tree decl, tree arg)
9590 if (TREE_CODE (arg) == DEFAULT_ARG)
9591 /* We get a DEFAULT_ARG when looking at an in-class declaration
9592 with a default argument. Ignore the argument for now; we'll
9593 deal with it after the class is complete. */
9602 decl_type = TREE_TYPE (decl);
9604 if (arg == error_mark_node
9605 || decl == error_mark_node
9606 || TREE_TYPE (arg) == error_mark_node
9607 || decl_type == error_mark_node)
9608 /* Something already went wrong. There's no need to check
9610 return error_mark_node;
9612 /* [dcl.fct.default]
9614 A default argument expression is implicitly converted to the
9616 if (!TREE_TYPE (arg)
9617 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9620 error ("default argument for %q#D has type %qT",
9621 decl, TREE_TYPE (arg));
9623 error ("default argument for parameter of type %qT has type %qT",
9624 decl_type, TREE_TYPE (arg));
9626 return error_mark_node;
9629 /* [dcl.fct.default]
9631 Local variables shall not be used in default argument
9634 The keyword `this' shall not be used in a default argument of a
9636 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9639 error ("default argument %qE uses local variable %qD", arg, var);
9640 return error_mark_node;
9647 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9650 type_is_deprecated (tree type)
9652 enum tree_code code;
9653 if (TREE_DEPRECATED (type))
9655 if (TYPE_NAME (type)
9656 && TREE_DEPRECATED (TYPE_NAME (type)))
9659 code = TREE_CODE (type);
9661 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9662 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9663 || code == METHOD_TYPE || code == ARRAY_TYPE)
9664 return type_is_deprecated (TREE_TYPE (type));
9666 if (TYPE_PTRMEMFUNC_P (type))
9667 return type_is_deprecated
9668 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9673 /* Decode the list of parameter types for a function type.
9674 Given the list of things declared inside the parens,
9675 return a list of types.
9677 If this parameter does not end with an ellipsis, we append
9680 *PARMS is set to the chain of PARM_DECLs created. */
9683 grokparms (tree parmlist, tree *parms)
9685 tree result = NULL_TREE;
9686 tree decls = NULL_TREE;
9690 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9692 tree type = NULL_TREE;
9693 tree init = TREE_PURPOSE (parm);
9694 tree decl = TREE_VALUE (parm);
9697 if (parm == void_list_node)
9700 if (! decl || TREE_TYPE (decl) == error_mark_node)
9703 type = TREE_TYPE (decl);
9704 if (VOID_TYPE_P (type))
9706 if (same_type_p (type, void_type_node)
9707 && DECL_SELF_REFERENCE_P (type)
9708 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9709 /* this is a parmlist of `(void)', which is ok. */
9711 cxx_incomplete_type_error (decl, type);
9712 /* It's not a good idea to actually create parameters of
9713 type `void'; other parts of the compiler assume that a
9714 void type terminates the parameter list. */
9715 type = error_mark_node;
9716 TREE_TYPE (decl) = error_mark_node;
9719 if (type != error_mark_node
9720 && TYPE_FOR_JAVA (type)
9721 && MAYBE_CLASS_TYPE_P (type))
9723 error ("parameter %qD has Java class type", decl);
9724 type = error_mark_node;
9725 TREE_TYPE (decl) = error_mark_node;
9729 if (type != error_mark_node
9730 && (errmsg = targetm.invalid_parameter_type (type)))
9733 type = error_mark_node;
9734 TREE_TYPE (decl) = error_mark_node;
9737 if (type != error_mark_node)
9739 if (deprecated_state != DEPRECATED_SUPPRESS)
9741 tree deptype = type_is_deprecated (type);
9743 warn_deprecated_use (deptype, NULL_TREE);
9746 /* Top-level qualifiers on the parameters are
9747 ignored for function types. */
9748 type = cp_build_qualified_type (type, 0);
9749 if (TREE_CODE (type) == METHOD_TYPE)
9751 error ("parameter %qD invalidly declared method type", decl);
9752 type = build_pointer_type (type);
9753 TREE_TYPE (decl) = type;
9755 else if (abstract_virtuals_error (decl, type))
9756 any_error = 1; /* Seems like a good idea. */
9757 else if (POINTER_TYPE_P (type))
9759 /* [dcl.fct]/6, parameter types cannot contain pointers
9760 (references) to arrays of unknown bound. */
9761 tree t = TREE_TYPE (type);
9762 int ptr = TYPE_PTR_P (type);
9768 else if (TREE_CODE (t) != ARRAY_TYPE)
9770 else if (!TYPE_DOMAIN (t))
9774 if (TREE_CODE (t) == ARRAY_TYPE)
9775 error ("parameter %qD includes %s to array of unknown "
9777 decl, ptr ? "pointer" : "reference", t);
9782 else if (init && !processing_template_decl)
9783 init = check_default_argument (decl, init);
9786 if (TREE_CODE (decl) == PARM_DECL
9787 && FUNCTION_PARAMETER_PACK_P (decl)
9788 && TREE_CHAIN (parm)
9789 && TREE_CHAIN (parm) != void_list_node)
9790 error ("parameter packs must be at the end of the parameter list");
9792 TREE_CHAIN (decl) = decls;
9794 result = tree_cons (init, type, result);
9796 decls = nreverse (decls);
9797 result = nreverse (result);
9799 result = chainon (result, void_list_node);
9806 /* D is a constructor or overloaded `operator='.
9808 Let T be the class in which D is declared. Then, this function
9811 -1 if D's is an ill-formed constructor or copy assignment operator
9812 whose first parameter is of type `T'.
9813 0 if D is not a copy constructor or copy assignment
9815 1 if D is a copy constructor or copy assignment operator whose
9816 first parameter is a reference to const qualified T.
9817 2 if D is a copy constructor or copy assignment operator whose
9818 first parameter is a reference to non-const qualified T.
9820 This function can be used as a predicate. Positive values indicate
9821 a copy constructor and nonzero values indicate a copy assignment
9825 copy_fn_p (const_tree d)
9831 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9833 if (TREE_CODE (d) == TEMPLATE_DECL
9834 || (DECL_TEMPLATE_INFO (d)
9835 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9836 /* Instantiations of template member functions are never copy
9837 functions. Note that member functions of templated classes are
9838 represented as template functions internally, and we must
9839 accept those as copy functions. */
9842 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9846 arg_type = TREE_VALUE (args);
9847 if (arg_type == error_mark_node)
9850 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9852 /* Pass by value copy assignment operator. */
9855 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9856 && !TYPE_REF_IS_RVALUE (arg_type)
9857 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9859 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9865 args = TREE_CHAIN (args);
9867 if (args && args != void_list_node && !TREE_PURPOSE (args))
9868 /* There are more non-optional args. */
9874 /* D is a constructor or overloaded `operator='.
9876 Let T be the class in which D is declared. Then, this function
9877 returns true when D is a move constructor or move assignment
9878 operator, false otherwise. */
9881 move_fn_p (const_tree d)
9885 bool result = false;
9887 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9889 if (cxx_dialect == cxx98)
9890 /* There are no move constructors if we are in C++98 mode. */
9893 if (TREE_CODE (d) == TEMPLATE_DECL
9894 || (DECL_TEMPLATE_INFO (d)
9895 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9896 /* Instantiations of template member functions are never copy
9897 functions. Note that member functions of templated classes are
9898 represented as template functions internally, and we must
9899 accept those as copy functions. */
9902 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9906 arg_type = TREE_VALUE (args);
9907 if (arg_type == error_mark_node)
9910 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9911 && TYPE_REF_IS_RVALUE (arg_type)
9912 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9916 args = TREE_CHAIN (args);
9918 if (args && args != void_list_node && !TREE_PURPOSE (args))
9919 /* There are more non-optional args. */
9925 /* Remember any special properties of member function DECL. */
9928 grok_special_member_properties (tree decl)
9932 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9935 class_type = DECL_CONTEXT (decl);
9936 if (DECL_CONSTRUCTOR_P (decl))
9938 int ctor = copy_fn_p (decl);
9940 if (!DECL_ARTIFICIAL (decl))
9941 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9947 A non-template constructor for class X is a copy
9948 constructor if its first parameter is of type X&, const
9949 X&, volatile X& or const volatile X&, and either there
9950 are no other parameters or else all other parameters have
9951 default arguments. */
9952 TYPE_HAS_INIT_REF (class_type) = 1;
9953 if (!DECL_DEFAULTED_FN (decl))
9954 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9956 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9958 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9960 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9961 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9962 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9964 else if (is_list_ctor (decl))
9965 TYPE_HAS_LIST_CTOR (class_type) = 1;
9967 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9971 A non-template assignment operator for class X is a copy
9972 assignment operator if its parameter is of type X, X&, const
9973 X&, volatile X& or const volatile X&. */
9975 int assop = copy_fn_p (decl);
9979 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9980 if (!DECL_DEFAULTED_FN (decl))
9981 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9983 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9988 /* Check a constructor DECL has the correct form. Complains
9989 if the class has a constructor of the form X(X). */
9992 grok_ctor_properties (const_tree ctype, const_tree decl)
9994 int ctor_parm = copy_fn_p (decl);
10000 A declaration of a constructor for a class X is ill-formed if
10001 its first parameter is of type (optionally cv-qualified) X
10002 and either there are no other parameters or else all other
10003 parameters have default arguments.
10005 We *don't* complain about member template instantiations that
10006 have this form, though; they can occur as we try to decide
10007 what constructor to use during overload resolution. Since
10008 overload resolution will never prefer such a constructor to
10009 the non-template copy constructor (which is either explicitly
10010 or implicitly defined), there's no need to worry about their
10011 existence. Theoretically, they should never even be
10012 instantiated, but that's hard to forestall. */
10013 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10021 /* An operator with this code is unary, but can also be binary. */
10024 ambi_op_p (enum tree_code code)
10026 return (code == INDIRECT_REF
10027 || code == ADDR_EXPR
10028 || code == UNARY_PLUS_EXPR
10029 || code == NEGATE_EXPR
10030 || code == PREINCREMENT_EXPR
10031 || code == PREDECREMENT_EXPR);
10034 /* An operator with this name can only be unary. */
10037 unary_op_p (enum tree_code code)
10039 return (code == TRUTH_NOT_EXPR
10040 || code == BIT_NOT_EXPR
10041 || code == COMPONENT_REF
10042 || code == TYPE_EXPR);
10045 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10046 errors are issued for invalid declarations. */
10049 grok_op_properties (tree decl, bool complain)
10051 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10053 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10054 tree name = DECL_NAME (decl);
10055 enum tree_code operator_code;
10060 /* Count the number of arguments and check for ellipsis. */
10061 for (argtype = argtypes, arity = 0;
10062 argtype && argtype != void_list_node;
10063 argtype = TREE_CHAIN (argtype))
10065 ellipsis_p = !argtype;
10067 class_type = DECL_CONTEXT (decl);
10068 if (class_type && !CLASS_TYPE_P (class_type))
10069 class_type = NULL_TREE;
10071 if (DECL_CONV_FN_P (decl))
10072 operator_code = TYPE_EXPR;
10076 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10077 if (ansi_opname (CODE) == name) \
10079 operator_code = (CODE); \
10082 else if (ansi_assopname (CODE) == name) \
10084 operator_code = (CODE); \
10085 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10089 #include "operators.def"
10090 #undef DEF_OPERATOR
10092 gcc_unreachable ();
10095 gcc_assert (operator_code != MAX_TREE_CODES);
10096 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10099 switch (operator_code)
10102 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10106 TYPE_GETS_DELETE (class_type) |= 1;
10110 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10113 case VEC_DELETE_EXPR:
10114 TYPE_GETS_DELETE (class_type) |= 2;
10121 /* [basic.std.dynamic.allocation]/1:
10123 A program is ill-formed if an allocation function is declared
10124 in a namespace scope other than global scope or declared static
10127 The same also holds true for deallocation functions. */
10128 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10129 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10131 if (DECL_NAMESPACE_SCOPE_P (decl))
10133 if (CP_DECL_CONTEXT (decl) != global_namespace)
10135 error ("%qD may not be declared within a namespace", decl);
10138 else if (!TREE_PUBLIC (decl))
10140 error ("%qD may not be declared as static", decl);
10146 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10148 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10149 DECL_IS_OPERATOR_NEW (decl) = 1;
10151 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10152 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10155 /* An operator function must either be a non-static member function
10156 or have at least one parameter of a class, a reference to a class,
10157 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10158 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10160 if (operator_code == TYPE_EXPR
10161 || operator_code == CALL_EXPR
10162 || operator_code == COMPONENT_REF
10163 || operator_code == ARRAY_REF
10164 || operator_code == NOP_EXPR)
10166 error ("%qD must be a nonstatic member function", decl);
10173 if (DECL_STATIC_FUNCTION_P (decl))
10175 error ("%qD must be either a non-static member "
10176 "function or a non-member function", decl);
10180 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10182 tree arg = non_reference (TREE_VALUE (p));
10183 if (arg == error_mark_node)
10186 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10187 because these checks are performed even on
10188 template functions. */
10189 if (MAYBE_CLASS_TYPE_P (arg)
10190 || TREE_CODE (arg) == ENUMERAL_TYPE)
10194 if (!p || p == void_list_node)
10197 error ("%qD must have an argument of class or "
10198 "enumerated type", decl);
10204 /* There are no restrictions on the arguments to an overloaded
10206 if (operator_code == CALL_EXPR)
10209 /* Warn about conversion operators that will never be used. */
10210 if (IDENTIFIER_TYPENAME_P (name)
10211 && ! DECL_TEMPLATE_INFO (decl)
10213 /* Warn only declaring the function; there is no need to
10214 warn again about out-of-class definitions. */
10215 && class_type == current_class_type)
10217 tree t = TREE_TYPE (name);
10218 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10219 const char *what = 0;
10222 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10224 if (TREE_CODE (t) == VOID_TYPE)
10226 else if (class_type)
10228 if (t == class_type)
10229 what = "the same type";
10230 /* Don't force t to be complete here. */
10231 else if (MAYBE_CLASS_TYPE_P (t)
10232 && COMPLETE_TYPE_P (t)
10233 && DERIVED_FROM_P (t, class_type))
10234 what = "a base class";
10238 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10239 "conversion operator",
10240 ref ? "a reference to " : "", what);
10243 if (operator_code == COND_EXPR)
10246 error ("ISO C++ prohibits overloading operator ?:");
10249 else if (ellipsis_p)
10251 error ("%qD must not have variable number of arguments", decl);
10254 else if (ambi_op_p (operator_code))
10257 /* We pick the one-argument operator codes by default, so
10258 we don't have to change anything. */
10260 else if (arity == 2)
10262 /* If we thought this was a unary operator, we now know
10263 it to be a binary operator. */
10264 switch (operator_code)
10267 operator_code = MULT_EXPR;
10271 operator_code = BIT_AND_EXPR;
10274 case UNARY_PLUS_EXPR:
10275 operator_code = PLUS_EXPR;
10279 operator_code = MINUS_EXPR;
10282 case PREINCREMENT_EXPR:
10283 operator_code = POSTINCREMENT_EXPR;
10286 case PREDECREMENT_EXPR:
10287 operator_code = POSTDECREMENT_EXPR;
10291 gcc_unreachable ();
10294 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10296 if ((operator_code == POSTINCREMENT_EXPR
10297 || operator_code == POSTDECREMENT_EXPR)
10298 && ! processing_template_decl
10299 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10302 error ("postfix %qD must take %<int%> as its argument",
10305 error ("postfix %qD must take %<int%> as its second "
10313 error ("%qD must take either zero or one argument", decl);
10315 error ("%qD must take either one or two arguments", decl);
10319 /* More Effective C++ rule 6. */
10321 && (operator_code == POSTINCREMENT_EXPR
10322 || operator_code == POSTDECREMENT_EXPR
10323 || operator_code == PREINCREMENT_EXPR
10324 || operator_code == PREDECREMENT_EXPR))
10326 tree arg = TREE_VALUE (argtypes);
10327 tree ret = TREE_TYPE (TREE_TYPE (decl));
10328 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10329 arg = TREE_TYPE (arg);
10330 arg = TYPE_MAIN_VARIANT (arg);
10331 if (operator_code == PREINCREMENT_EXPR
10332 || operator_code == PREDECREMENT_EXPR)
10334 if (TREE_CODE (ret) != REFERENCE_TYPE
10335 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10337 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10338 build_reference_type (arg));
10342 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10343 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10347 else if (unary_op_p (operator_code))
10352 error ("%qD must take %<void%>", decl);
10354 error ("%qD must take exactly one argument", decl);
10358 else /* if (binary_op_p (operator_code)) */
10363 error ("%qD must take exactly one argument", decl);
10365 error ("%qD must take exactly two arguments", decl);
10369 /* More Effective C++ rule 7. */
10371 && (operator_code == TRUTH_ANDIF_EXPR
10372 || operator_code == TRUTH_ORIF_EXPR
10373 || operator_code == COMPOUND_EXPR))
10374 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10378 /* Effective C++ rule 23. */
10381 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10382 && (operator_code == PLUS_EXPR
10383 || operator_code == MINUS_EXPR
10384 || operator_code == TRUNC_DIV_EXPR
10385 || operator_code == MULT_EXPR
10386 || operator_code == TRUNC_MOD_EXPR)
10387 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10388 warning (OPT_Weffc__, "%qD should return by value", decl);
10390 /* [over.oper]/8 */
10391 for (; argtypes && argtypes != void_list_node;
10392 argtypes = TREE_CHAIN (argtypes))
10393 if (TREE_PURPOSE (argtypes))
10395 TREE_PURPOSE (argtypes) = NULL_TREE;
10396 if (operator_code == POSTINCREMENT_EXPR
10397 || operator_code == POSTDECREMENT_EXPR)
10399 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10404 error ("%qD cannot have default arguments", decl);
10412 /* Return a string giving the keyword associate with CODE. */
10414 static const char *
10415 tag_name (enum tag_types code)
10427 case typename_type:
10430 gcc_unreachable ();
10434 /* Name lookup in an elaborated-type-specifier (after the keyword
10435 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10436 elaborated-type-specifier is invalid, issue a diagnostic and return
10437 error_mark_node; otherwise, return the *_TYPE to which it referred.
10438 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10441 check_elaborated_type_specifier (enum tag_types tag_code,
10443 bool allow_template_p)
10449 struct S { struct S *p; };
10451 name lookup will find the TYPE_DECL for the implicit "S::S"
10452 typedef. Adjust for that here. */
10453 if (DECL_SELF_REFERENCE_P (decl))
10454 decl = TYPE_NAME (TREE_TYPE (decl));
10456 type = TREE_TYPE (decl);
10458 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10459 is false for this case as well. */
10460 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10462 error ("using template type parameter %qT after %qs",
10463 type, tag_name (tag_code));
10464 return error_mark_node;
10468 If the identifier resolves to a typedef-name or a template
10469 type-parameter, the elaborated-type-specifier is ill-formed.
10471 In other words, the only legitimate declaration to use in the
10472 elaborated type specifier is the implicit typedef created when
10473 the type is declared. */
10474 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10475 && tag_code != typename_type)
10477 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10478 error ("%q+D has a previous declaration here", decl);
10479 return error_mark_node;
10481 else if (TREE_CODE (type) != RECORD_TYPE
10482 && TREE_CODE (type) != UNION_TYPE
10483 && tag_code != enum_type
10484 && tag_code != typename_type)
10486 error ("%qT referred to as %qs", type, tag_name (tag_code));
10487 error ("%q+T has a previous declaration here", type);
10488 return error_mark_node;
10490 else if (TREE_CODE (type) != ENUMERAL_TYPE
10491 && tag_code == enum_type)
10493 error ("%qT referred to as enum", type);
10494 error ("%q+T has a previous declaration here", type);
10495 return error_mark_node;
10497 else if (!allow_template_p
10498 && TREE_CODE (type) == RECORD_TYPE
10499 && CLASSTYPE_IS_TEMPLATE (type))
10501 /* If a class template appears as elaborated type specifier
10502 without a template header such as:
10504 template <class T> class C {};
10505 void f(class C); // No template header here
10507 then the required template argument is missing. */
10508 error ("template argument required for %<%s %T%>",
10509 tag_name (tag_code),
10510 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10511 return error_mark_node;
10517 /* Lookup NAME in elaborate type specifier in scope according to
10518 SCOPE and issue diagnostics if necessary.
10519 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10520 found, and ERROR_MARK_NODE for type error. */
10523 lookup_and_check_tag (enum tag_types tag_code, tree name,
10524 tag_scope scope, bool template_header_p)
10528 if (scope == ts_global)
10530 /* First try ordinary name lookup, ignoring hidden class name
10531 injected via friend declaration. */
10532 decl = lookup_name_prefer_type (name, 2);
10533 /* If that fails, the name will be placed in the smallest
10534 non-class, non-function-prototype scope according to 3.3.1/5.
10535 We may already have a hidden name declared as friend in this
10536 scope. So lookup again but not ignoring hidden names.
10537 If we find one, that name will be made visible rather than
10538 creating a new tag. */
10540 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10543 decl = lookup_type_scope (name, scope);
10545 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10546 decl = DECL_TEMPLATE_RESULT (decl);
10548 if (decl && TREE_CODE (decl) == TYPE_DECL)
10550 /* Look for invalid nested type:
10554 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10556 error ("%qD has the same name as the class in which it is "
10559 return error_mark_node;
10562 /* Two cases we need to consider when deciding if a class
10563 template is allowed as an elaborated type specifier:
10564 1. It is a self reference to its own class.
10565 2. It comes with a template header.
10569 template <class T> class C {
10570 class C *c1; // DECL_SELF_REFERENCE_P is true
10573 template <class U> class C; // template_header_p is true
10574 template <class T> class C<T>::D {
10575 class C *c2; // DECL_SELF_REFERENCE_P is true
10578 t = check_elaborated_type_specifier (tag_code,
10581 | DECL_SELF_REFERENCE_P (decl));
10584 else if (decl && TREE_CODE (decl) == TREE_LIST)
10586 error ("reference to %qD is ambiguous", name);
10587 print_candidates (decl);
10588 return error_mark_node;
10594 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10595 Define the tag as a forward-reference if it is not defined.
10597 If a declaration is given, process it here, and report an error if
10598 multiple declarations are not identical.
10600 SCOPE is TS_CURRENT when this is also a definition. Only look in
10601 the current frame for the name (since C++ allows new names in any
10602 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10603 declaration. Only look beginning from the current scope outward up
10604 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10606 TEMPLATE_HEADER_P is true when this declaration is preceded by
10607 a set of template parameters. */
10610 xref_tag (enum tag_types tag_code, tree name,
10611 tag_scope scope, bool template_header_p)
10613 enum tree_code code;
10615 tree context = NULL_TREE;
10617 timevar_push (TV_NAME_LOOKUP);
10619 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10625 code = RECORD_TYPE;
10631 code = ENUMERAL_TYPE;
10634 gcc_unreachable ();
10637 /* In case of anonymous name, xref_tag is only called to
10638 make type node and push name. Name lookup is not required. */
10639 if (ANON_AGGRNAME_P (name))
10642 t = lookup_and_check_tag (tag_code, name,
10643 scope, template_header_p);
10645 if (t == error_mark_node)
10646 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10648 if (scope != ts_current && t && current_class_type
10649 && template_class_depth (current_class_type)
10650 && template_header_p)
10652 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10653 definition of this tag. Since, in addition, we are currently
10654 processing a (member) template declaration of a template
10655 class, we must be very careful; consider:
10662 { template <class V>
10663 friend struct S1; };
10665 Here, the S2::S1 declaration should not be confused with the
10666 outer declaration. In particular, the inner version should
10667 have a template parameter of level 2, not level 1. This
10668 would be particularly important if the member declaration
10671 template <class V = U> friend struct S1;
10673 say, when we should tsubst into `U' when instantiating
10674 S2. On the other hand, when presented with:
10684 we must find the inner binding eventually. We
10685 accomplish this by making sure that the new type we
10686 create to represent this declaration has the right
10688 context = TYPE_CONTEXT (t);
10694 /* If no such tag is yet defined, create a forward-reference node
10695 and record it as the "definition".
10696 When a real declaration of this type is found,
10697 the forward-reference will be altered into a real type. */
10698 if (code == ENUMERAL_TYPE)
10700 error ("use of enum %q#D without previous declaration", name);
10701 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10705 t = make_class_type (code);
10706 TYPE_CONTEXT (t) = context;
10707 t = pushtag (name, t, scope);
10712 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10714 if (!redeclare_class_template (t, current_template_parms))
10715 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10717 else if (!processing_template_decl
10718 && CLASS_TYPE_P (t)
10719 && CLASSTYPE_IS_TEMPLATE (t))
10721 error ("redeclaration of %qT as a non-template", t);
10722 error ("previous declaration %q+D", t);
10723 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10726 /* Make injected friend class visible. */
10727 if (scope != ts_within_enclosing_non_class
10728 && hidden_name_p (TYPE_NAME (t)))
10730 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10731 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10733 if (TYPE_TEMPLATE_INFO (t))
10735 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10736 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10741 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10745 xref_tag_from_type (tree old, tree id, tag_scope scope)
10747 enum tag_types tag_kind;
10749 if (TREE_CODE (old) == RECORD_TYPE)
10750 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10752 tag_kind = union_type;
10754 if (id == NULL_TREE)
10755 id = TYPE_IDENTIFIER (old);
10757 return xref_tag (tag_kind, id, scope, false);
10760 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10761 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10762 access_* node, and the TREE_VALUE is the type of the base-class.
10763 Non-NULL TREE_TYPE indicates virtual inheritance.
10765 Returns true if the binfo hierarchy was successfully created,
10766 false if an error was detected. */
10769 xref_basetypes (tree ref, tree base_list)
10772 tree binfo, base_binfo;
10773 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10774 unsigned max_bases = 0; /* Maximum direct bases. */
10776 tree default_access;
10777 tree igo_prev; /* Track Inheritance Graph Order. */
10779 if (ref == error_mark_node)
10782 /* The base of a derived class is private by default, all others are
10784 default_access = (TREE_CODE (ref) == RECORD_TYPE
10785 && CLASSTYPE_DECLARED_CLASS (ref)
10786 ? access_private_node : access_public_node);
10788 /* First, make sure that any templates in base-classes are
10789 instantiated. This ensures that if we call ourselves recursively
10790 we do not get confused about which classes are marked and which
10792 basep = &base_list;
10795 tree basetype = TREE_VALUE (*basep);
10797 if (!(processing_template_decl && uses_template_parms (basetype))
10798 && !complete_type_or_else (basetype, NULL))
10799 /* An incomplete type. Remove it from the list. */
10800 *basep = TREE_CHAIN (*basep);
10804 if (TREE_TYPE (*basep))
10806 if (CLASS_TYPE_P (basetype))
10807 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10808 basep = &TREE_CHAIN (*basep);
10812 TYPE_MARKED_P (ref) = 1;
10814 /* The binfo slot should be empty, unless this is an (ill-formed)
10816 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10817 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10819 binfo = make_tree_binfo (max_bases);
10821 TYPE_BINFO (ref) = binfo;
10822 BINFO_OFFSET (binfo) = size_zero_node;
10823 BINFO_TYPE (binfo) = ref;
10825 /* Apply base-class info set up to the variants of this type. */
10826 fixup_type_variants (ref);
10830 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10831 /* An aggregate cannot have baseclasses. */
10832 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10834 if (TREE_CODE (ref) == UNION_TYPE)
10836 error ("derived union %qT invalid", ref);
10843 if (TYPE_FOR_JAVA (ref))
10845 error ("Java class %qT cannot have multiple bases", ref);
10852 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10854 if (TYPE_FOR_JAVA (ref))
10856 error ("Java class %qT cannot have virtual bases", ref);
10861 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10863 tree access = TREE_PURPOSE (base_list);
10864 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10865 tree basetype = TREE_VALUE (base_list);
10867 if (access == access_default_node)
10868 access = default_access;
10870 if (PACK_EXPANSION_P (basetype))
10871 basetype = PACK_EXPANSION_PATTERN (basetype);
10872 if (TREE_CODE (basetype) == TYPE_DECL)
10873 basetype = TREE_TYPE (basetype);
10874 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10876 error ("base type %qT fails to be a struct or class type",
10881 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10882 TYPE_FOR_JAVA (ref) = 1;
10884 base_binfo = NULL_TREE;
10885 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10887 base_binfo = TYPE_BINFO (basetype);
10888 /* The original basetype could have been a typedef'd type. */
10889 basetype = BINFO_TYPE (base_binfo);
10891 /* Inherit flags from the base. */
10892 TYPE_HAS_NEW_OPERATOR (ref)
10893 |= TYPE_HAS_NEW_OPERATOR (basetype);
10894 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10895 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10896 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10897 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10898 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10899 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10900 CLASSTYPE_REPEATED_BASE_P (ref)
10901 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10904 /* We must do this test after we've seen through a typedef
10906 if (TYPE_MARKED_P (basetype))
10908 if (basetype == ref)
10909 error ("recursive type %qT undefined", basetype);
10911 error ("duplicate base type %qT invalid", basetype);
10915 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10916 /* Regenerate the pack expansion for the bases. */
10917 basetype = make_pack_expansion (basetype);
10919 TYPE_MARKED_P (basetype) = 1;
10921 base_binfo = copy_binfo (base_binfo, basetype, ref,
10922 &igo_prev, via_virtual);
10923 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10924 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10926 BINFO_BASE_APPEND (binfo, base_binfo);
10927 BINFO_BASE_ACCESS_APPEND (binfo, access);
10930 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10931 /* If we have space in the vbase vector, we must have shared at
10932 least one of them, and are therefore diamond shaped. */
10933 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10935 /* Unmark all the types. */
10936 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10937 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10938 TYPE_MARKED_P (ref) = 0;
10940 /* Now see if we have a repeated base type. */
10941 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10943 for (base_binfo = binfo; base_binfo;
10944 base_binfo = TREE_CHAIN (base_binfo))
10946 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10948 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10951 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10953 for (base_binfo = binfo; base_binfo;
10954 base_binfo = TREE_CHAIN (base_binfo))
10955 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10956 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10965 /* Begin compiling the definition of an enumeration type.
10968 UNDERLYING_TYPE is the type that will be used as the storage for
10969 the enumeration type. This should be NULL_TREE if no storage type
10972 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10974 Returns the type object, as yet incomplete.
10975 Also records info about it so that build_enumerator
10976 may be used to declare the individual values as they are read. */
10979 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10983 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10985 /* If this is the real definition for a previous forward reference,
10986 fill in the contents in the same object that used to be the
10987 forward reference. */
10989 enumtype = lookup_and_check_tag (enum_type, name,
10990 /*tag_scope=*/ts_current,
10991 /*template_header_p=*/false);
10993 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10995 error ("multiple definition of %q#T", enumtype);
10996 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10997 /* Clear out TYPE_VALUES, and start again. */
10998 TYPE_VALUES (enumtype) = NULL_TREE;
11002 /* In case of error, make a dummy enum to allow parsing to
11004 if (enumtype == error_mark_node)
11005 name = make_anon_name ();
11007 enumtype = make_node (ENUMERAL_TYPE);
11008 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11011 if (enumtype == error_mark_node)
11016 SET_SCOPED_ENUM_P (enumtype, 1);
11017 begin_scope (sk_scoped_enum, enumtype);
11019 /* [C++0x dcl.enum]p5:
11021 If not explicitly specified, the underlying type of a scoped
11022 enumeration type is int. */
11023 if (!underlying_type)
11024 underlying_type = integer_type_node;
11027 if (underlying_type)
11029 if (CP_INTEGRAL_TYPE_P (underlying_type))
11031 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11032 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11033 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11034 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11035 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11036 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11037 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11038 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11039 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11040 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11043 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11044 underlying_type, enumtype);
11050 /* After processing and defining all the values of an enumeration type,
11051 install their decls in the enumeration type and finish it off.
11052 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11055 finish_enum (tree enumtype)
11064 bool use_short_enum;
11069 tree underlying_type = NULL_TREE;
11070 bool fixed_underlying_type_p
11071 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11073 /* We built up the VALUES in reverse order. */
11074 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11076 /* For an enum defined in a template, just set the type of the values;
11077 all further processing is postponed until the template is
11078 instantiated. We need to set the type so that tsubst of a CONST_DECL
11080 if (processing_template_decl)
11082 for (values = TYPE_VALUES (enumtype);
11084 values = TREE_CHAIN (values))
11085 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11086 if (at_function_scope_p ())
11087 add_stmt (build_min (TAG_DEFN, enumtype));
11091 /* Determine the minimum and maximum values of the enumerators. */
11092 if (TYPE_VALUES (enumtype))
11094 minnode = maxnode = NULL_TREE;
11096 for (values = TYPE_VALUES (enumtype);
11098 values = TREE_CHAIN (values))
11100 decl = TREE_VALUE (values);
11102 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11103 each enumerator has the type of its enumeration. Prior to the
11104 closing brace, the type of each enumerator is the type of its
11105 initializing value. */
11106 TREE_TYPE (decl) = enumtype;
11108 /* Update the minimum and maximum values, if appropriate. */
11109 value = DECL_INITIAL (decl);
11110 if (value == error_mark_node)
11111 value = integer_zero_node;
11112 /* Figure out what the minimum and maximum values of the
11113 enumerators are. */
11115 minnode = maxnode = value;
11116 else if (tree_int_cst_lt (maxnode, value))
11118 else if (tree_int_cst_lt (value, minnode))
11125 If the enumerator-list is empty, the underlying type is as if
11126 the enumeration had a single enumerator with value 0. */
11127 minnode = maxnode = integer_zero_node;
11129 /* Compute the number of bits require to represent all values of the
11130 enumeration. We must do this before the type of MINNODE and
11131 MAXNODE are transformed, since tree_int_cst_min_precision relies
11132 on the TREE_TYPE of the value it is passed. */
11133 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11134 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11135 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11136 precision = MAX (lowprec, highprec);
11138 if (!fixed_underlying_type_p)
11140 /* Determine the underlying type of the enumeration.
11144 The underlying type of an enumeration is an integral type that
11145 can represent all the enumerator values defined in the
11146 enumeration. It is implementation-defined which integral type is
11147 used as the underlying type for an enumeration except that the
11148 underlying type shall not be larger than int unless the value of
11149 an enumerator cannot fit in an int or unsigned int.
11151 We use "int" or an "unsigned int" as the underlying type, even if
11152 a smaller integral type would work, unless the user has
11153 explicitly requested that we use the smallest possible type. The
11154 user can request that for all enumerations with a command line
11155 flag, or for just one enumeration with an attribute. */
11157 use_short_enum = flag_short_enums
11158 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11160 for (itk = (use_short_enum ? itk_char : itk_int);
11164 underlying_type = integer_types[itk];
11165 if (TYPE_PRECISION (underlying_type) >= precision
11166 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11169 if (itk == itk_none)
11173 IF no integral type can represent all the enumerator values, the
11174 enumeration is ill-formed. */
11175 error ("no integral type can represent all of the enumerator values "
11176 "for %qT", enumtype);
11177 precision = TYPE_PRECISION (long_long_integer_type_node);
11178 underlying_type = integer_types[itk_unsigned_long_long];
11183 The value of sizeof() applied to an enumeration type, an object
11184 of an enumeration type, or an enumerator, is the value of sizeof()
11185 applied to the underlying type. */
11186 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11187 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11188 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11189 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11190 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11191 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11193 /* Set the underlying type of the enumeration type to the
11194 computed enumeration type, restricted to the enumerator
11196 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11197 set_min_and_max_values_for_integral_type
11198 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11201 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11203 /* Compute the minimum and maximum values for the type.
11207 For an enumeration where emin is the smallest enumerator and emax
11208 is the largest, the values of the enumeration are the values of the
11209 underlying type in the range bmin to bmax, where bmin and bmax are,
11210 respectively, the smallest and largest values of the smallest bit-
11211 field that can store emin and emax. */
11213 /* The middle-end currently assumes that types with TYPE_PRECISION
11214 narrower than their underlying type are suitably zero or sign
11215 extended to fill their mode. g++ doesn't make these guarantees.
11216 Until the middle-end can represent such paradoxical types, we
11217 set the TYPE_PRECISION to the width of the underlying type. */
11218 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11220 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11222 /* Convert each of the enumerators to the type of the underlying
11223 type of the enumeration. */
11224 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11226 location_t saved_location;
11228 decl = TREE_VALUE (values);
11229 saved_location = input_location;
11230 input_location = DECL_SOURCE_LOCATION (decl);
11231 if (fixed_underlying_type_p)
11232 /* If the enumeration type has a fixed underlying type, we
11233 already checked all of the enumerator values. */
11234 value = DECL_INITIAL (decl);
11236 value = perform_implicit_conversion (underlying_type,
11237 DECL_INITIAL (decl),
11238 tf_warning_or_error);
11239 input_location = saved_location;
11241 /* Do not clobber shared ints. */
11242 value = copy_node (value);
11244 TREE_TYPE (value) = enumtype;
11245 DECL_INITIAL (decl) = value;
11248 /* Fix up all variant types of this enum type. */
11249 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11251 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11252 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11253 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11254 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11255 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11256 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11257 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11258 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11259 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11260 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11261 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11264 /* Finish up the scope of a scoped enumeration. */
11265 if (SCOPED_ENUM_P (enumtype))
11268 /* Finish debugging output for this type. */
11269 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11272 /* Build and install a CONST_DECL for an enumeration constant of the
11273 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11274 Assignment of sequential values by default is handled here. */
11277 build_enumerator (tree name, tree value, tree enumtype)
11283 /* If the VALUE was erroneous, pretend it wasn't there; that will
11284 result in the enum being assigned the next value in sequence. */
11285 if (value == error_mark_node)
11288 /* Remove no-op casts from the value. */
11290 STRIP_TYPE_NOPS (value);
11292 if (! processing_template_decl)
11294 /* Validate and default VALUE. */
11295 if (value != NULL_TREE)
11297 value = integral_constant_value (value);
11299 if (TREE_CODE (value) == INTEGER_CST)
11301 value = perform_integral_promotions (value);
11302 constant_expression_warning (value);
11306 error ("enumerator value for %qD is not an integer constant", name);
11311 /* Default based on previous value. */
11312 if (value == NULL_TREE)
11314 if (TYPE_VALUES (enumtype))
11317 unsigned HOST_WIDE_INT lo;
11321 /* The next value is the previous value plus one.
11322 add_double doesn't know the type of the target expression,
11323 so we must check with int_fits_type_p as well. */
11324 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11325 if (error_operand_p (prev_value))
11326 value = error_mark_node;
11329 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11330 TREE_INT_CST_HIGH (prev_value),
11332 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11334 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11338 error ("overflow in enumeration values at %qD", name);
11339 value = error_mark_node;
11344 value = integer_zero_node;
11347 /* Remove no-op casts from the value. */
11348 STRIP_TYPE_NOPS (value);
11350 /* If the underlying type of the enum is fixed, check whether
11351 the enumerator values fits in the underlying type. If it
11352 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11353 if (ENUM_UNDERLYING_TYPE (enumtype)
11355 && TREE_CODE (value) == INTEGER_CST
11356 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11358 error ("enumerator value %E is too large for underlying type %<%T%>",
11359 value, ENUM_UNDERLYING_TYPE (enumtype));
11361 /* Silently convert the value so that we can continue. */
11362 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11367 /* C++ associates enums with global, function, or class declarations. */
11368 context = current_scope ();
11370 /* Build the actual enumeration constant. Note that the enumeration
11371 constants have the underlying type of the enum (if it is fixed)
11372 or the type of their initializer (if the underlying type of the
11373 enum is not fixed):
11377 If the underlying type is fixed, the type of each enumerator
11378 prior to the closing brace is the underlying type; if the
11379 initializing value of an enumerator cannot be represented by
11380 the underlying type, the program is ill-formed. If the
11381 underlying type is not fixed, the type of each enumerator is
11382 the type of its initializing value.
11384 If the underlying type is not fixed, it will be computed by
11385 finish_enum and we will reset the type of this enumerator. Of
11386 course, if we're processing a template, there may be no value. */
11387 type = value ? TREE_TYPE (value) : NULL_TREE;
11389 if (context && context == current_class_type)
11390 /* This enum declaration is local to the class. We need the full
11391 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11392 decl = build_lang_decl (CONST_DECL, name, type);
11394 /* It's a global enum, or it's local to a function. (Note local to
11395 a function could mean local to a class method. */
11396 decl = build_decl (input_location, CONST_DECL, name, type);
11398 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11399 TREE_CONSTANT (decl) = 1;
11400 TREE_READONLY (decl) = 1;
11401 DECL_INITIAL (decl) = value;
11403 if (context && context == current_class_type)
11404 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11405 on the TYPE_FIELDS list for `S'. (That's so that you can say
11406 things like `S::i' later.) */
11407 finish_member_declaration (decl);
11411 /* Add this enumeration constant to the list for this type. */
11412 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11415 /* Look for an enumerator with the given NAME within the enumeration
11416 type ENUMTYPE. This routine is used primarily for qualified name
11417 lookup into an enumerator in C++0x, e.g.,
11419 enum class Color { Red, Green, Blue };
11421 Color color = Color::Red;
11423 Returns the value corresponding to the enumerator, or
11424 NULL_TREE if no such enumerator was found. */
11426 lookup_enumerator (tree enumtype, tree name)
11429 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11431 e = purpose_member (name, TYPE_VALUES (enumtype));
11432 return e? TREE_VALUE (e) : NULL_TREE;
11436 /* We're defining DECL. Make sure that it's type is OK. */
11439 check_function_type (tree decl, tree current_function_parms)
11441 tree fntype = TREE_TYPE (decl);
11442 tree return_type = complete_type (TREE_TYPE (fntype));
11444 /* In a function definition, arg types must be complete. */
11445 require_complete_types_for_parms (current_function_parms);
11447 if (dependent_type_p (return_type))
11449 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11450 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11452 tree args = TYPE_ARG_TYPES (fntype);
11454 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11455 error ("return type %q#T is incomplete", return_type);
11457 error ("return type has Java class type %q#T", return_type);
11459 /* Make it return void instead. */
11460 if (TREE_CODE (fntype) == METHOD_TYPE)
11461 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11463 TREE_CHAIN (args));
11465 fntype = build_function_type (void_type_node, args);
11467 = build_exception_variant (fntype,
11468 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11471 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11474 /* Create the FUNCTION_DECL for a function definition.
11475 DECLSPECS and DECLARATOR are the parts of the declaration;
11476 they describe the function's name and the type it returns,
11477 but twisted together in a fashion that parallels the syntax of C.
11479 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11480 DECLARATOR is really the DECL for the function we are about to
11481 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11482 indicating that the function is an inline defined in-class.
11484 This function creates a binding context for the function body
11485 as well as setting up the FUNCTION_DECL in current_function_decl.
11487 For C++, we must first check whether that datum makes any sense.
11488 For example, "class A local_a(1,2);" means that variable local_a
11489 is an aggregate of type A, which should have a constructor
11490 applied to it with the argument list [1, 2].
11492 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11493 or may be a BLOCK if the function has been defined previously
11494 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11495 error_mark_node if the function has never been defined, or
11496 a BLOCK if the function has been defined somewhere. */
11499 start_preparsed_function (tree decl1, tree attrs, int flags)
11501 tree ctype = NULL_TREE;
11504 int doing_friend = 0;
11505 struct cp_binding_level *bl;
11506 tree current_function_parms;
11507 struct c_fileinfo *finfo
11508 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11509 bool honor_interface;
11511 /* Sanity check. */
11512 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11513 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11515 fntype = TREE_TYPE (decl1);
11516 if (TREE_CODE (fntype) == METHOD_TYPE)
11517 ctype = TYPE_METHOD_BASETYPE (fntype);
11519 /* ISO C++ 11.4/5. A friend function defined in a class is in
11520 the (lexical) scope of the class in which it is defined. */
11521 if (!ctype && DECL_FRIEND_P (decl1))
11523 ctype = DECL_FRIEND_CONTEXT (decl1);
11525 /* CTYPE could be null here if we're dealing with a template;
11526 for example, `inline friend float foo()' inside a template
11527 will have no CTYPE set. */
11528 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11534 if (DECL_DECLARED_INLINE_P (decl1)
11535 && lookup_attribute ("noinline", attrs))
11536 warning (0, "inline function %q+D given attribute noinline", decl1);
11538 /* Handle gnu_inline attribute. */
11539 if (GNU_INLINE_P (decl1))
11541 DECL_EXTERNAL (decl1) = 1;
11542 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11543 DECL_INTERFACE_KNOWN (decl1) = 1;
11544 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11547 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11548 /* This is a constructor, we must ensure that any default args
11549 introduced by this definition are propagated to the clones
11550 now. The clones are used directly in overload resolution. */
11551 adjust_clone_args (decl1);
11553 /* Sometimes we don't notice that a function is a static member, and
11554 build a METHOD_TYPE for it. Fix that up now. */
11555 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11556 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11558 revert_static_member_fn (decl1);
11562 /* Set up current_class_type, and enter the scope of the class, if
11565 push_nested_class (ctype);
11566 else if (DECL_STATIC_FUNCTION_P (decl1))
11567 push_nested_class (DECL_CONTEXT (decl1));
11569 /* Now that we have entered the scope of the class, we must restore
11570 the bindings for any template parameters surrounding DECL1, if it
11571 is an inline member template. (Order is important; consider the
11572 case where a template parameter has the same name as a field of
11573 the class.) It is not until after this point that
11574 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11575 if (flags & SF_INCLASS_INLINE)
11576 maybe_begin_member_template_processing (decl1);
11578 /* Effective C++ rule 15. */
11580 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11581 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11582 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11584 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11585 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11586 if (!DECL_INITIAL (decl1))
11587 DECL_INITIAL (decl1) = error_mark_node;
11589 /* This function exists in static storage.
11590 (This does not mean `static' in the C sense!) */
11591 TREE_STATIC (decl1) = 1;
11593 /* We must call push_template_decl after current_class_type is set
11594 up. (If we are processing inline definitions after exiting a
11595 class scope, current_class_type will be NULL_TREE until set above
11596 by push_nested_class.) */
11597 if (processing_template_decl)
11599 /* FIXME: Handle error_mark_node more gracefully. */
11600 tree newdecl1 = push_template_decl (decl1);
11601 if (newdecl1 != error_mark_node)
11605 /* We are now in the scope of the function being defined. */
11606 current_function_decl = decl1;
11608 /* Save the parm names or decls from this function's declarator
11609 where store_parm_decls will find them. */
11610 current_function_parms = DECL_ARGUMENTS (decl1);
11612 /* Make sure the parameter and return types are reasonable. When
11613 you declare a function, these types can be incomplete, but they
11614 must be complete when you define the function. */
11615 check_function_type (decl1, current_function_parms);
11617 /* Build the return declaration for the function. */
11618 restype = TREE_TYPE (fntype);
11619 if (DECL_RESULT (decl1) == NULL_TREE)
11623 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11624 DECL_ARTIFICIAL (resdecl) = 1;
11625 DECL_IGNORED_P (resdecl) = 1;
11626 DECL_RESULT (decl1) = resdecl;
11628 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11631 /* Let the user know we're compiling this function. */
11632 announce_function (decl1);
11634 /* Record the decl so that the function name is defined.
11635 If we already have a decl for this name, and it is a FUNCTION_DECL,
11636 use the old decl. */
11637 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11639 /* A specialization is not used to guide overload resolution. */
11640 if (!DECL_FUNCTION_MEMBER_P (decl1)
11641 && !(DECL_USE_TEMPLATE (decl1) &&
11642 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11644 tree olddecl = pushdecl (decl1);
11646 if (olddecl == error_mark_node)
11647 /* If something went wrong when registering the declaration,
11648 use DECL1; we have to have a FUNCTION_DECL to use when
11649 parsing the body of the function. */
11653 /* Otherwise, OLDDECL is either a previous declaration
11654 of the same function or DECL1 itself. */
11656 if (warn_missing_declarations
11657 && olddecl == decl1
11658 && !DECL_MAIN_P (decl1)
11659 && TREE_PUBLIC (decl1)
11660 && !DECL_DECLARED_INLINE_P (decl1))
11664 /* Check whether DECL1 is in an anonymous
11666 for (context = DECL_CONTEXT (decl1);
11668 context = DECL_CONTEXT (context))
11670 if (TREE_CODE (context) == NAMESPACE_DECL
11671 && DECL_NAME (context) == NULL_TREE)
11675 if (context == NULL)
11676 warning (OPT_Wmissing_declarations,
11677 "no previous declaration for %q+D", decl1);
11685 /* We need to set the DECL_CONTEXT. */
11686 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11687 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11689 fntype = TREE_TYPE (decl1);
11691 /* If #pragma weak applies, mark the decl appropriately now.
11692 The pragma only applies to global functions. Because
11693 determining whether or not the #pragma applies involves
11694 computing the mangled name for the declaration, we cannot
11695 apply the pragma until after we have merged this declaration
11696 with any previous declarations; if the original declaration
11697 has a linkage specification, that specification applies to
11698 the definition as well, and may affect the mangled name. */
11699 if (!DECL_CONTEXT (decl1))
11700 maybe_apply_pragma_weak (decl1);
11703 /* Reset this in case the call to pushdecl changed it. */
11704 current_function_decl = decl1;
11706 gcc_assert (DECL_INITIAL (decl1));
11708 /* This function may already have been parsed, in which case just
11709 return; our caller will skip over the body without parsing. */
11710 if (DECL_INITIAL (decl1) != error_mark_node)
11713 /* Initialize RTL machinery. We cannot do this until
11714 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11715 even when processing a template; this is how we get
11716 CFUN set up, and our per-function variables initialized.
11717 FIXME factor out the non-RTL stuff. */
11718 bl = current_binding_level;
11719 allocate_struct_function (decl1, processing_template_decl);
11721 /* Initialize the language data structures. Whenever we start
11722 a new function, we destroy temporaries in the usual way. */
11723 cfun->language = GGC_CNEW (struct language_function);
11724 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11725 current_binding_level = bl;
11727 /* Even though we're inside a function body, we still don't want to
11728 call expand_expr to calculate the size of a variable-sized array.
11729 We haven't necessarily assigned RTL to all variables yet, so it's
11730 not safe to try to expand expressions involving them. */
11731 cfun->dont_save_pending_sizes_p = 1;
11733 /* Start the statement-tree, start the tree now. */
11734 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11736 /* If we are (erroneously) defining a function that we have already
11737 defined before, wipe out what we knew before. */
11738 if (!DECL_PENDING_INLINE_P (decl1))
11739 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11741 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11743 /* We know that this was set up by `grokclassfn'. We do not
11744 wait until `store_parm_decls', since evil parse errors may
11745 never get us to that point. Here we keep the consistency
11746 between `current_class_type' and `current_class_ptr'. */
11747 tree t = DECL_ARGUMENTS (decl1);
11749 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11750 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11752 cp_function_chain->x_current_class_ref
11753 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11754 cp_function_chain->x_current_class_ptr = t;
11756 /* Constructors and destructors need to know whether they're "in
11757 charge" of initializing virtual base classes. */
11758 t = TREE_CHAIN (t);
11759 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11761 current_in_charge_parm = t;
11762 t = TREE_CHAIN (t);
11764 if (DECL_HAS_VTT_PARM_P (decl1))
11766 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11767 current_vtt_parm = t;
11771 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11772 /* Implicitly-defined methods (like the
11773 destructor for a class in which no destructor
11774 is explicitly declared) must not be defined
11775 until their definition is needed. So, we
11776 ignore interface specifications for
11777 compiler-generated functions. */
11778 && !DECL_ARTIFICIAL (decl1));
11780 if (DECL_INTERFACE_KNOWN (decl1))
11782 tree ctx = decl_function_context (decl1);
11784 if (DECL_NOT_REALLY_EXTERN (decl1))
11785 DECL_EXTERNAL (decl1) = 0;
11787 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11788 && TREE_PUBLIC (ctx))
11789 /* This is a function in a local class in an extern inline
11791 comdat_linkage (decl1);
11793 /* If this function belongs to an interface, it is public.
11794 If it belongs to someone else's interface, it is also external.
11795 This only affects inlines and template instantiations. */
11796 else if (!finfo->interface_unknown && honor_interface)
11798 if (DECL_DECLARED_INLINE_P (decl1)
11799 || DECL_TEMPLATE_INSTANTIATION (decl1)
11800 || processing_template_decl)
11802 DECL_EXTERNAL (decl1)
11803 = (finfo->interface_only
11804 || (DECL_DECLARED_INLINE_P (decl1)
11805 && ! flag_implement_inlines
11806 && !DECL_VINDEX (decl1)));
11808 /* For WIN32 we also want to put these in linkonce sections. */
11809 maybe_make_one_only (decl1);
11812 DECL_EXTERNAL (decl1) = 0;
11813 DECL_INTERFACE_KNOWN (decl1) = 1;
11814 /* If this function is in an interface implemented in this file,
11815 make sure that the back end knows to emit this function
11817 if (!DECL_EXTERNAL (decl1))
11818 mark_needed (decl1);
11820 else if (finfo->interface_unknown && finfo->interface_only
11821 && honor_interface)
11823 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11824 interface, we will have both finfo->interface_unknown and
11825 finfo->interface_only set. In that case, we don't want to
11826 use the normal heuristics because someone will supply a
11827 #pragma implementation elsewhere, and deducing it here would
11828 produce a conflict. */
11829 comdat_linkage (decl1);
11830 DECL_EXTERNAL (decl1) = 0;
11831 DECL_INTERFACE_KNOWN (decl1) = 1;
11832 DECL_DEFER_OUTPUT (decl1) = 1;
11836 /* This is a definition, not a reference.
11837 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11838 if (!GNU_INLINE_P (decl1))
11839 DECL_EXTERNAL (decl1) = 0;
11841 if ((DECL_DECLARED_INLINE_P (decl1)
11842 || DECL_TEMPLATE_INSTANTIATION (decl1))
11843 && ! DECL_INTERFACE_KNOWN (decl1)
11844 /* Don't try to defer nested functions for now. */
11845 && ! decl_function_context (decl1))
11846 DECL_DEFER_OUTPUT (decl1) = 1;
11848 DECL_INTERFACE_KNOWN (decl1) = 1;
11851 /* Determine the ELF visibility attribute for the function. We must not
11852 do this before calling "pushdecl", as we must allow "duplicate_decls"
11853 to merge any attributes appropriately. We also need to wait until
11855 if (!DECL_CLONED_FUNCTION_P (decl1))
11856 determine_visibility (decl1);
11858 begin_scope (sk_function_parms, decl1);
11862 if (DECL_DESTRUCTOR_P (decl1)
11863 || (DECL_CONSTRUCTOR_P (decl1)
11864 && targetm.cxx.cdtor_returns_this ()))
11866 cdtor_label = build_decl (input_location,
11867 LABEL_DECL, NULL_TREE, NULL_TREE);
11868 DECL_CONTEXT (cdtor_label) = current_function_decl;
11871 start_fname_decls ();
11873 store_parm_decls (current_function_parms);
11877 /* Like start_preparsed_function, except that instead of a
11878 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11880 Returns 1 on success. If the DECLARATOR is not suitable for a function
11881 (it defines a datum instead), we return 0, which tells
11882 yyparse to report a parse error. */
11885 start_function (cp_decl_specifier_seq *declspecs,
11886 const cp_declarator *declarator,
11891 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11892 if (decl1 == error_mark_node)
11894 /* If the declarator is not suitable for a function definition,
11895 cause a syntax error. */
11896 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11898 error ("invalid function declaration");
11902 if (DECL_MAIN_P (decl1))
11903 /* main must return int. grokfndecl should have corrected it
11904 (and issued a diagnostic) if the user got it wrong. */
11905 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11906 integer_type_node));
11908 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11913 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11917 use_eh_spec_block (tree fn)
11919 return (flag_exceptions && flag_enforce_eh_specs
11920 && !processing_template_decl
11921 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11922 /* We insert the EH_SPEC_BLOCK only in the original
11923 function; then, it is copied automatically to the
11925 && !DECL_CLONED_FUNCTION_P (fn)
11926 /* Implicitly-generated constructors and destructors have
11927 exception specifications. However, those specifications
11928 are the union of the possible exceptions specified by the
11929 constructors/destructors for bases and members, so no
11930 unallowed exception will ever reach this function. By
11931 not creating the EH_SPEC_BLOCK we save a little memory,
11932 and we avoid spurious warnings about unreachable
11934 && !DECL_ARTIFICIAL (fn));
11937 /* Store the parameter declarations into the current function declaration.
11938 This is called after parsing the parameter declarations, before
11939 digesting the body of the function.
11941 Also install to binding contour return value identifier, if any. */
11944 store_parm_decls (tree current_function_parms)
11946 tree fndecl = current_function_decl;
11949 /* This is a chain of any other decls that came in among the parm
11950 declarations. If a parm is declared with enum {foo, bar} x;
11951 then CONST_DECLs for foo and bar are put here. */
11952 tree nonparms = NULL_TREE;
11954 if (current_function_parms)
11956 /* This case is when the function was defined with an ANSI prototype.
11957 The parms already have decls, so we need not do anything here
11958 except record them as in effect
11959 and complain if any redundant old-style parm decls were written. */
11961 tree specparms = current_function_parms;
11964 /* Must clear this because it might contain TYPE_DECLs declared
11966 current_binding_level->names = NULL;
11968 /* If we're doing semantic analysis, then we'll call pushdecl
11969 for each of these. We must do them in reverse order so that
11970 they end in the correct forward order. */
11971 specparms = nreverse (specparms);
11973 for (parm = specparms; parm; parm = next)
11975 next = TREE_CHAIN (parm);
11976 if (TREE_CODE (parm) == PARM_DECL)
11978 if (DECL_NAME (parm) == NULL_TREE
11979 || TREE_CODE (parm) != VOID_TYPE)
11982 error ("parameter %qD declared void", parm);
11986 /* If we find an enum constant or a type tag,
11987 put it aside for the moment. */
11988 TREE_CHAIN (parm) = NULL_TREE;
11989 nonparms = chainon (nonparms, parm);
11993 /* Get the decls in their original chain order and record in the
11994 function. This is all and only the PARM_DECLs that were
11995 pushed into scope by the loop above. */
11996 DECL_ARGUMENTS (fndecl) = getdecls ();
11999 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12001 /* Now store the final chain of decls for the arguments
12002 as the decl-chain of the current lexical scope.
12003 Put the enumerators in as well, at the front so that
12004 DECL_ARGUMENTS is not modified. */
12005 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12007 if (use_eh_spec_block (current_function_decl))
12008 current_eh_spec_block = begin_eh_spec_block ();
12012 /* We have finished doing semantic analysis on DECL, but have not yet
12013 generated RTL for its body. Save away our current state, so that
12014 when we want to generate RTL later we know what to do. */
12017 save_function_data (tree decl)
12019 struct language_function *f;
12021 /* Save the language-specific per-function data so that we can
12022 get it back when we really expand this function. */
12023 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12026 f = GGC_NEW (struct language_function);
12027 memcpy (f, cp_function_chain, sizeof (struct language_function));
12028 DECL_SAVED_FUNCTION_DATA (decl) = f;
12030 /* Clear out the bits we don't need. */
12031 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12032 f->bindings = NULL;
12033 f->x_local_names = NULL;
12037 /* Set the return value of the constructor (if present). */
12040 finish_constructor_body (void)
12045 if (targetm.cxx.cdtor_returns_this ()
12046 && (! TYPE_FOR_JAVA (current_class_type)))
12048 /* Any return from a constructor will end up here. */
12049 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12051 val = DECL_ARGUMENTS (current_function_decl);
12052 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12053 DECL_RESULT (current_function_decl), val);
12054 /* Return the address of the object. */
12055 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12056 add_stmt (exprstmt);
12060 /* Do all the processing for the beginning of a destructor; set up the
12061 vtable pointers and cleanups for bases and members. */
12064 begin_destructor_body (void)
12066 tree compound_stmt;
12068 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12069 issued an error message. We still want to try to process the
12070 body of the function, but initialize_vtbl_ptrs will crash if
12071 TYPE_BINFO is NULL. */
12072 if (COMPLETE_TYPE_P (current_class_type))
12074 compound_stmt = begin_compound_stmt (0);
12075 /* Make all virtual function table pointers in non-virtual base
12076 classes point to CURRENT_CLASS_TYPE's virtual function
12078 initialize_vtbl_ptrs (current_class_ptr);
12079 finish_compound_stmt (compound_stmt);
12081 /* And insert cleanups for our bases and members so that they
12082 will be properly destroyed if we throw. */
12083 push_base_cleanups ();
12087 /* At the end of every destructor we generate code to delete the object if
12088 necessary. Do that now. */
12091 finish_destructor_body (void)
12095 /* Any return from a destructor will end up here; that way all base
12096 and member cleanups will be run when the function returns. */
12097 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12099 /* In a virtual destructor, we must call delete. */
12100 if (DECL_VIRTUAL_P (current_function_decl))
12103 tree virtual_size = cxx_sizeof (current_class_type);
12107 At the point of definition of a virtual destructor (including
12108 an implicit definition), non-placement operator delete shall
12109 be looked up in the scope of the destructor's class and if
12110 found shall be accessible and unambiguous. */
12111 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12113 /*global_p=*/false,
12114 /*placement=*/NULL_TREE,
12115 /*alloc_fn=*/NULL_TREE);
12117 if_stmt = begin_if_stmt ();
12118 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12119 current_in_charge_parm,
12122 finish_expr_stmt (exprstmt);
12123 finish_then_clause (if_stmt);
12124 finish_if_stmt (if_stmt);
12127 if (targetm.cxx.cdtor_returns_this ())
12131 val = DECL_ARGUMENTS (current_function_decl);
12132 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12133 DECL_RESULT (current_function_decl), val);
12134 /* Return the address of the object. */
12135 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12136 add_stmt (exprstmt);
12140 /* Do the necessary processing for the beginning of a function body, which
12141 in this case includes member-initializers, but not the catch clauses of
12142 a function-try-block. Currently, this means opening a binding level
12143 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12146 begin_function_body (void)
12150 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12153 if (processing_template_decl)
12154 /* Do nothing now. */;
12156 /* Always keep the BLOCK node associated with the outermost pair of
12157 curly braces of a function. These are needed for correct
12158 operation of dwarfout.c. */
12159 keep_next_level (true);
12161 stmt = begin_compound_stmt (BCS_FN_BODY);
12163 if (processing_template_decl)
12164 /* Do nothing now. */;
12165 else if (DECL_DESTRUCTOR_P (current_function_decl))
12166 begin_destructor_body ();
12171 /* Do the processing for the end of a function body. Currently, this means
12172 closing out the cleanups for fully-constructed bases and members, and in
12173 the case of the destructor, deleting the object if desired. Again, this
12174 is only meaningful for [cd]tors, since they are the only functions where
12175 there is a significant distinction between the main body and any
12176 function catch clauses. Handling, say, main() return semantics here
12177 would be wrong, as flowing off the end of a function catch clause for
12178 main() would also need to return 0. */
12181 finish_function_body (tree compstmt)
12183 if (compstmt == NULL_TREE)
12186 /* Close the block. */
12187 finish_compound_stmt (compstmt);
12189 if (processing_template_decl)
12190 /* Do nothing now. */;
12191 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12192 finish_constructor_body ();
12193 else if (DECL_DESTRUCTOR_P (current_function_decl))
12194 finish_destructor_body ();
12197 /* Given a function, returns the BLOCK corresponding to the outermost level
12198 of curly braces, skipping the artificial block created for constructor
12202 outer_curly_brace_block (tree fndecl)
12204 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12205 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12206 /* Skip the artificial function body block. */
12207 block = BLOCK_SUBBLOCKS (block);
12211 /* Finish up a function declaration and compile that function
12212 all the way to assembler language output. The free the storage
12213 for the function definition.
12215 FLAGS is a bitwise or of the following values:
12217 We just finished processing the body of an in-class inline
12218 function definition. (This processing will have taken place
12219 after the class definition is complete.) */
12222 finish_function (int flags)
12224 tree fndecl = current_function_decl;
12225 tree fntype, ctype = NULL_TREE;
12226 int inclass_inline = (flags & 2) != 0;
12229 /* When we get some parse errors, we can end up without a
12230 current_function_decl, so cope. */
12231 if (fndecl == NULL_TREE)
12232 return error_mark_node;
12234 gcc_assert (!defer_mark_used_calls);
12235 defer_mark_used_calls = true;
12237 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12238 && DECL_VIRTUAL_P (fndecl)
12239 && !processing_template_decl)
12241 tree fnclass = DECL_CONTEXT (fndecl);
12242 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12243 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12246 nested = function_depth > 1;
12247 fntype = TREE_TYPE (fndecl);
12249 /* TREE_READONLY (fndecl) = 1;
12250 This caused &foo to be of type ptr-to-const-function
12251 which then got a warning when stored in a ptr-to-function variable. */
12253 gcc_assert (building_stmt_tree ());
12254 /* The current function is being defined, so its DECL_INITIAL should
12255 be set, and unless there's a multiple definition, it should be
12256 error_mark_node. */
12257 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12259 /* For a cloned function, we've already got all the code we need;
12260 there's no need to add any extra bits. */
12261 if (!DECL_CLONED_FUNCTION_P (fndecl))
12263 if (DECL_MAIN_P (current_function_decl))
12267 /* Make it so that `main' always returns 0 by default (or
12270 stmt = finish_return_stmt (integer_one_node);
12272 stmt = finish_return_stmt (integer_zero_node);
12274 /* Hack. We don't want the middle-end to warn that this
12275 return is unreachable, so put the statement on the
12278 location_t linezero = linemap_line_start (line_table, 0, 1);
12279 SET_EXPR_LOCATION (stmt, linezero);
12283 if (use_eh_spec_block (current_function_decl))
12284 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12285 (TREE_TYPE (current_function_decl)),
12286 current_eh_spec_block);
12289 /* If we're saving up tree structure, tie off the function now. */
12290 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12292 finish_fname_decls ();
12294 /* If this function can't throw any exceptions, remember that. */
12295 if (!processing_template_decl
12296 && !cp_function_chain->can_throw
12297 && !flag_non_call_exceptions
12298 && !DECL_REPLACEABLE_P (fndecl))
12299 TREE_NOTHROW (fndecl) = 1;
12301 /* This must come after expand_function_end because cleanups might
12302 have declarations (from inline functions) that need to go into
12303 this function's blocks. */
12305 /* If the current binding level isn't the outermost binding level
12306 for this function, either there is a bug, or we have experienced
12307 syntax errors and the statement tree is malformed. */
12308 if (current_binding_level->kind != sk_function_parms)
12310 /* Make sure we have already experienced errors. */
12311 gcc_assert (errorcount);
12313 /* Throw away the broken statement tree and extra binding
12315 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12317 while (current_binding_level->kind != sk_function_parms)
12319 if (current_binding_level->kind == sk_class)
12320 pop_nested_class ();
12322 poplevel (0, 0, 0);
12325 poplevel (1, 0, 1);
12327 /* Statements should always be full-expressions at the outermost set
12328 of curly braces for a function. */
12329 gcc_assert (stmts_are_full_exprs_p ());
12331 /* Set up the named return value optimization, if we can. Candidate
12332 variables are selected in check_return_expr. */
12333 if (current_function_return_value)
12335 tree r = current_function_return_value;
12338 if (r != error_mark_node
12339 /* This is only worth doing for fns that return in memory--and
12340 simpler, since we don't have to worry about promoted modes. */
12341 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12342 /* Only allow this for variables declared in the outer scope of
12343 the function so we know that their lifetime always ends with a
12344 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12345 we were to do this optimization in tree-ssa. */
12346 && (outer = outer_curly_brace_block (fndecl))
12347 && chain_member (r, BLOCK_VARS (outer)))
12348 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12350 current_function_return_value = NULL_TREE;
12353 /* Remember that we were in class scope. */
12354 if (current_class_name)
12355 ctype = current_class_type;
12357 /* Must mark the RESULT_DECL as being in this function. */
12358 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12360 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12361 to the FUNCTION_DECL node itself. */
12362 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12364 /* Save away current state, if appropriate. */
12365 if (!processing_template_decl)
12366 save_function_data (fndecl);
12368 /* Complain if there's just no return statement. */
12369 if (warn_return_type
12370 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12371 && !dependent_type_p (TREE_TYPE (fntype))
12372 && !current_function_returns_value && !current_function_returns_null
12373 /* Don't complain if we abort or throw. */
12374 && !current_function_returns_abnormally
12375 && !DECL_NAME (DECL_RESULT (fndecl))
12376 && !TREE_NO_WARNING (fndecl)
12377 /* Structor return values (if any) are set by the compiler. */
12378 && !DECL_CONSTRUCTOR_P (fndecl)
12379 && !DECL_DESTRUCTOR_P (fndecl))
12381 warning (OPT_Wreturn_type,
12382 "no return statement in function returning non-void");
12383 TREE_NO_WARNING (fndecl) = 1;
12386 /* Store the end of the function, so that we get good line number
12387 info for the epilogue. */
12388 cfun->function_end_locus = input_location;
12390 /* Genericize before inlining. */
12391 if (!processing_template_decl)
12393 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12394 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12395 cp_genericize (fndecl);
12396 /* Clear out the bits we don't need. */
12397 f->x_current_class_ptr = NULL;
12398 f->x_current_class_ref = NULL;
12399 f->x_eh_spec_block = NULL;
12400 f->x_in_charge_parm = NULL;
12401 f->x_vtt_parm = NULL;
12402 f->x_return_value = NULL;
12403 f->bindings = NULL;
12404 f->extern_decl_map = NULL;
12406 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12407 c_warn_unused_result (gimple_body (fndecl));
12409 /* Clear out the bits we don't need. */
12410 local_names = NULL;
12412 /* We're leaving the context of this function, so zap cfun. It's still in
12413 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12415 current_function_decl = NULL;
12417 /* If this is an in-class inline definition, we may have to pop the
12418 bindings for the template parameters that we added in
12419 maybe_begin_member_template_processing when start_function was
12421 if (inclass_inline)
12422 maybe_end_member_template_processing ();
12424 /* Leave the scope of the class. */
12426 pop_nested_class ();
12432 /* Let the error reporting routines know that we're outside a
12433 function. For a nested function, this value is used in
12434 cxx_pop_function_context and then reset via pop_function_context. */
12435 current_function_decl = NULL_TREE;
12437 defer_mark_used_calls = false;
12438 if (deferred_mark_used_calls)
12443 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12445 VEC_free (tree, gc, deferred_mark_used_calls);
12451 /* Create the FUNCTION_DECL for a function definition.
12452 DECLSPECS and DECLARATOR are the parts of the declaration;
12453 they describe the return type and the name of the function,
12454 but twisted together in a fashion that parallels the syntax of C.
12456 This function creates a binding context for the function body
12457 as well as setting up the FUNCTION_DECL in current_function_decl.
12459 Returns a FUNCTION_DECL on success.
12461 If the DECLARATOR is not suitable for a function (it defines a datum
12462 instead), we return 0, which tells yyparse to report a parse error.
12464 May return void_type_node indicating that this method is actually
12465 a friend. See grokfield for more details.
12467 Came here with a `.pushlevel' .
12469 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12470 CHANGES TO CODE IN `grokfield'. */
12473 start_method (cp_decl_specifier_seq *declspecs,
12474 const cp_declarator *declarator, tree attrlist)
12476 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12479 if (fndecl == error_mark_node)
12480 return error_mark_node;
12482 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12484 error ("invalid member function declaration");
12485 return error_mark_node;
12489 cplus_decl_attributes (&fndecl, attrlist, 0);
12491 /* Pass friends other than inline friend functions back. */
12492 if (fndecl == void_type_node)
12495 if (DECL_IN_AGGR_P (fndecl))
12497 if (DECL_CONTEXT (fndecl)
12498 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12499 error ("%qD is already defined in class %qT", fndecl,
12500 DECL_CONTEXT (fndecl));
12501 return error_mark_node;
12504 check_template_shadow (fndecl);
12506 DECL_DECLARED_INLINE_P (fndecl) = 1;
12507 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12509 /* We process method specializations in finish_struct_1. */
12510 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12512 fndecl = push_template_decl (fndecl);
12513 if (fndecl == error_mark_node)
12517 if (! DECL_FRIEND_P (fndecl))
12519 if (TREE_CHAIN (fndecl))
12521 fndecl = copy_node (fndecl);
12522 TREE_CHAIN (fndecl) = NULL_TREE;
12526 finish_decl (fndecl, NULL_TREE, NULL_TREE, NULL_TREE);
12528 /* Make a place for the parms. */
12529 begin_scope (sk_function_parms, fndecl);
12531 DECL_IN_AGGR_P (fndecl) = 1;
12535 /* Go through the motions of finishing a function definition.
12536 We don't compile this method until after the whole class has
12539 FINISH_METHOD must return something that looks as though it
12540 came from GROKFIELD (since we are defining a method, after all).
12542 This is called after parsing the body of the function definition.
12543 STMTS is the chain of statements that makes up the function body.
12545 DECL is the ..._DECL that `start_method' provided. */
12548 finish_method (tree decl)
12550 tree fndecl = decl;
12555 if (decl == void_type_node)
12558 old_initial = DECL_INITIAL (fndecl);
12560 /* Undo the level for the parms (from start_method).
12561 This is like poplevel, but it causes nothing to be
12562 saved. Saving information here confuses symbol-table
12563 output routines. Besides, this information will
12564 be correctly output when this method is actually
12567 /* Clear out the meanings of the local variables of this level;
12568 also record in each decl which block it belongs to. */
12570 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12572 if (DECL_NAME (link) != NULL_TREE)
12573 pop_binding (DECL_NAME (link), link);
12574 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12575 DECL_CONTEXT (link) = NULL_TREE;
12578 poplevel (0, 0, 0);
12580 DECL_INITIAL (fndecl) = old_initial;
12582 /* We used to check if the context of FNDECL was different from
12583 current_class_type as another way to get inside here. This didn't work
12584 for String.cc in libg++. */
12585 if (DECL_FRIEND_P (fndecl))
12587 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12589 decl = void_type_node;
12596 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12597 we can lay it out later, when and if its type becomes complete. */
12600 maybe_register_incomplete_var (tree var)
12602 gcc_assert (TREE_CODE (var) == VAR_DECL);
12604 /* Keep track of variables with incomplete types. */
12605 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12606 && DECL_EXTERNAL (var))
12608 tree inner_type = TREE_TYPE (var);
12610 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12611 inner_type = TREE_TYPE (inner_type);
12612 inner_type = TYPE_MAIN_VARIANT (inner_type);
12614 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12615 /* RTTI TD entries are created while defining the type_info. */
12616 || (TYPE_LANG_SPECIFIC (inner_type)
12617 && TYPE_BEING_DEFINED (inner_type)))
12618 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12622 /* Called when a class type (given by TYPE) is defined. If there are
12623 any existing VAR_DECLs whose type has been completed by this
12624 declaration, update them now. */
12627 complete_vars (tree type)
12629 tree *list = &incomplete_vars;
12631 gcc_assert (CLASS_TYPE_P (type));
12634 if (same_type_p (type, TREE_PURPOSE (*list)))
12636 tree var = TREE_VALUE (*list);
12637 tree type = TREE_TYPE (var);
12638 /* Complete the type of the variable. The VAR_DECL itself
12639 will be laid out in expand_expr. */
12640 complete_type (type);
12641 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12642 /* Remove this entry from the list. */
12643 *list = TREE_CHAIN (*list);
12646 list = &TREE_CHAIN (*list);
12649 /* Check for pending declarations which may have abstract type. */
12650 complete_type_check_abstract (type);
12653 /* If DECL is of a type which needs a cleanup, build and return an
12654 expression to perform that cleanup here. Return NULL_TREE if no
12655 cleanup need be done. */
12658 cxx_maybe_build_cleanup (tree decl)
12664 /* Assume no cleanup is required. */
12665 cleanup = NULL_TREE;
12667 if (error_operand_p (decl))
12670 /* Handle "__attribute__((cleanup))". We run the cleanup function
12671 before the destructor since the destructor is what actually
12672 terminates the lifetime of the object. */
12673 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12680 /* Get the name specified by the user for the cleanup function. */
12681 id = TREE_VALUE (TREE_VALUE (attr));
12682 /* Look up the name to find the cleanup function to call. It is
12683 important to use lookup_name here because that is what is
12684 used in c-common.c:handle_cleanup_attribute when performing
12685 initial checks on the attribute. Note that those checks
12686 include ensuring that the function found is not an overloaded
12687 function, or an object with an overloaded call operator,
12688 etc.; we can rely on the fact that the function found is an
12689 ordinary FUNCTION_DECL. */
12690 fn = lookup_name (id);
12691 arg = build_address (decl);
12693 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12695 tf_warning_or_error);
12697 /* Handle ordinary C++ destructors. */
12698 type = TREE_TYPE (decl);
12699 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12701 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12702 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12703 && CLASSTYPE_VBASECLASSES (type));
12707 if (TREE_CODE (type) == ARRAY_TYPE)
12710 addr = build_address (decl);
12712 /* Optimize for space over speed here. */
12713 if (!has_vbases || flag_expensive_optimizations)
12714 flags |= LOOKUP_NONVIRTUAL;
12716 call = build_delete (TREE_TYPE (addr), addr,
12717 sfk_complete_destructor, flags, 0);
12719 cleanup = build_compound_expr (input_location, cleanup, call);
12727 /* When a stmt has been parsed, this function is called. */
12734 /* DECL was originally constructed as a non-static member function,
12735 but turned out to be static. Update it accordingly. */
12738 revert_static_member_fn (tree decl)
12741 tree function = TREE_TYPE (decl);
12742 tree args = TYPE_ARG_TYPES (function);
12744 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12745 != TYPE_UNQUALIFIED)
12746 error ("static member function %q#D declared with type qualifiers", decl);
12748 args = TREE_CHAIN (args);
12749 tmp = build_function_type (TREE_TYPE (function), args);
12750 tmp = build_qualified_type (tmp, cp_type_quals (function));
12751 tmp = build_exception_variant (tmp,
12752 TYPE_RAISES_EXCEPTIONS (function));
12753 TREE_TYPE (decl) = tmp;
12754 if (DECL_ARGUMENTS (decl))
12755 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12756 DECL_STATIC_FUNCTION_P (decl) = 1;
12759 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12760 one of the language-independent trees. */
12762 enum cp_tree_node_structure_enum
12763 cp_tree_node_structure (union lang_tree_node * t)
12765 switch (TREE_CODE (&t->generic))
12767 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12768 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12769 case OVERLOAD: return TS_CP_OVERLOAD;
12770 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12771 case PTRMEM_CST: return TS_CP_PTRMEM;
12772 case BASELINK: return TS_CP_BASELINK;
12773 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12774 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12775 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12776 default: return TS_CP_GENERIC;
12780 /* Build the void_list_node (void_type_node having been created). */
12782 build_void_list_node (void)
12784 tree t = build_tree_list (NULL_TREE, void_type_node);
12789 cp_missing_noreturn_ok_p (tree decl)
12791 /* A missing noreturn is ok for the `main' function. */
12792 return DECL_MAIN_P (decl);
12795 /* Return the COMDAT group into which DECL should be placed. */
12798 cxx_comdat_group (tree decl)
12802 /* Virtual tables, construction virtual tables, and virtual table
12803 tables all go in a single COMDAT group, named after the primary
12805 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12806 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12807 /* For all other DECLs, the COMDAT group is the mangled name of the
12808 declaration itself. */
12811 while (DECL_THUNK_P (decl))
12813 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12814 into the same section as the target function. In that case
12815 we must return target's name. */
12816 tree target = THUNK_TARGET (decl);
12817 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12818 && DECL_SECTION_NAME (target) != NULL
12819 && DECL_ONE_ONLY (target))
12824 name = DECL_ASSEMBLER_NAME (decl);
12830 #include "gt-cp-decl.h"