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 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 if (TREE_CODE (f1) != TREE_CODE (f2))
938 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
940 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
941 && (DECL_BUILT_IN (olddecl)
942 #ifndef NO_IMPLICIT_EXTERN_C
943 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
944 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
948 types_match = self_promoting_args_p (p1);
949 if (p1 == void_list_node)
950 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
952 #ifndef NO_IMPLICIT_EXTERN_C
953 else if (p1 == NULL_TREE
954 && (DECL_EXTERN_C_P (olddecl)
955 && DECL_IN_SYSTEM_HEADER (olddecl)
956 && !DECL_CLASS_SCOPE_P (olddecl))
957 && (DECL_EXTERN_C_P (newdecl)
958 && DECL_IN_SYSTEM_HEADER (newdecl)
959 && !DECL_CLASS_SCOPE_P (newdecl)))
961 types_match = self_promoting_args_p (p2);
962 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
966 types_match = compparms (p1, p2);
971 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
973 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
974 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
977 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
978 DECL_TEMPLATE_PARMS (olddecl)))
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
982 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
983 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
985 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
986 DECL_TEMPLATE_RESULT (newdecl));
990 /* Need to check scope for variable declaration (VAR_DECL).
991 For typedef (TYPE_DECL), scope is ignored. */
992 if (TREE_CODE (newdecl) == VAR_DECL
993 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
995 Two declarations for an object with C language linkage
996 with the same name (ignoring the namespace that qualify
997 it) that appear in different namespace scopes refer to
999 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1002 if (TREE_TYPE (newdecl) == error_mark_node)
1003 types_match = TREE_TYPE (olddecl) == error_mark_node;
1004 else if (TREE_TYPE (olddecl) == NULL_TREE)
1005 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1006 else if (TREE_TYPE (newdecl) == NULL_TREE)
1009 types_match = comptypes (TREE_TYPE (newdecl),
1010 TREE_TYPE (olddecl),
1011 COMPARE_REDECLARATION);
1017 /* If NEWDECL is `static' and an `extern' was seen previously,
1018 warn about it. OLDDECL is the previous declaration.
1020 Note that this does not apply to the C++ case of declaring
1021 a variable `extern const' and then later `const'.
1023 Don't complain about built-in functions, since they are beyond
1024 the user's control. */
1027 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1031 if (TREE_CODE (newdecl) == TYPE_DECL
1032 || TREE_CODE (newdecl) == TEMPLATE_DECL
1033 || TREE_CODE (newdecl) == CONST_DECL
1034 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1037 /* Don't get confused by static member functions; that's a different
1039 if (TREE_CODE (newdecl) == FUNCTION_DECL
1040 && DECL_STATIC_FUNCTION_P (newdecl))
1043 /* If the old declaration was `static', or the new one isn't, then
1044 then everything is OK. */
1045 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1048 /* It's OK to declare a builtin function as `static'. */
1049 if (TREE_CODE (olddecl) == FUNCTION_DECL
1050 && DECL_ARTIFICIAL (olddecl))
1053 name = DECL_ASSEMBLER_NAME (newdecl);
1054 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1055 permerror (input_location, "previous declaration of %q+D", olddecl);
1058 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1059 function templates. If their exception specifications do not
1060 match, issue a diagnostic. */
1063 check_redeclaration_exception_specification (tree new_decl,
1068 tree new_exceptions;
1069 tree old_exceptions;
1071 new_type = TREE_TYPE (new_decl);
1072 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1073 old_type = TREE_TYPE (old_decl);
1074 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1078 If any declaration of a function has an exception-specification,
1079 all declarations, including the definition and an explicit
1080 specialization, of that function shall have an
1081 exception-specification with the same set of type-ids. */
1082 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1083 && ! DECL_IS_BUILTIN (old_decl)
1085 && !comp_except_specs (new_exceptions, old_exceptions,
1088 error ("declaration of %qF throws different exceptions", new_decl);
1089 error ("from previous declaration %q+F", old_decl);
1093 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1094 && lookup_attribute ("gnu_inline", \
1095 DECL_ATTRIBUTES (fn)))
1097 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1098 If the redeclaration is invalid, a diagnostic is issued, and the
1099 error_mark_node is returned. Otherwise, OLDDECL is returned.
1101 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1104 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1107 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1109 unsigned olddecl_uid = DECL_UID (olddecl);
1110 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1111 int new_defines_function = 0;
1114 if (newdecl == olddecl)
1117 types_match = decls_match (newdecl, olddecl);
1119 /* If either the type of the new decl or the type of the old decl is an
1120 error_mark_node, then that implies that we have already issued an
1121 error (earlier) for some bogus type specification, and in that case,
1122 it is rather pointless to harass the user with yet more error message
1123 about the same declaration, so just pretend the types match here. */
1124 if (TREE_TYPE (newdecl) == error_mark_node
1125 || TREE_TYPE (olddecl) == error_mark_node)
1126 return error_mark_node;
1128 if (DECL_P (olddecl)
1129 && TREE_CODE (newdecl) == FUNCTION_DECL
1130 && TREE_CODE (olddecl) == FUNCTION_DECL
1131 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1133 if (DECL_DECLARED_INLINE_P (newdecl)
1134 && DECL_UNINLINABLE (newdecl)
1135 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1136 /* Already warned elsewhere. */;
1137 else if (DECL_DECLARED_INLINE_P (olddecl)
1138 && DECL_UNINLINABLE (olddecl)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1140 /* Already warned. */;
1141 else if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (olddecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1145 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1147 warning (OPT_Wattributes, "previous declaration of %q+D "
1148 "with attribute noinline", olddecl);
1150 else if (DECL_DECLARED_INLINE_P (olddecl)
1151 && DECL_UNINLINABLE (newdecl)
1152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1154 warning (OPT_Wattributes, "function %q+D redeclared with "
1155 "attribute noinline", newdecl);
1156 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1161 /* Check for redeclaration and other discrepancies. */
1162 if (TREE_CODE (olddecl) == FUNCTION_DECL
1163 && DECL_ARTIFICIAL (olddecl))
1165 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1166 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1168 /* Avoid warnings redeclaring built-ins which have not been
1169 explicitly declared. */
1170 if (DECL_ANTICIPATED (olddecl))
1173 /* If you declare a built-in or predefined function name as static,
1174 the old definition is overridden, but optionally warn this was a
1175 bad choice of name. */
1176 if (! TREE_PUBLIC (newdecl))
1178 warning (OPT_Wshadow, "shadowing %s function %q#D",
1179 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1181 /* Discard the old built-in function. */
1184 /* If the built-in is not ansi, then programs can override
1185 it even globally without an error. */
1186 else if (! DECL_BUILT_IN (olddecl))
1187 warning (0, "library function %q#D redeclared as non-function %q#D",
1191 error ("declaration of %q#D", newdecl);
1192 error ("conflicts with built-in declaration %q#D",
1197 else if (!types_match)
1199 /* Avoid warnings redeclaring built-ins which have not been
1200 explicitly declared. */
1201 if (DECL_ANTICIPATED (olddecl))
1203 /* Deal with fileptr_type_node. FILE type is not known
1204 at the time we create the builtins. */
1207 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1208 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1210 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1213 else if (TREE_VALUE (t2) == fileptr_type_node)
1215 tree t = TREE_VALUE (t1);
1217 if (TREE_CODE (t) == POINTER_TYPE
1218 && TYPE_NAME (TREE_TYPE (t))
1219 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1220 == get_identifier ("FILE")
1221 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1223 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1225 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1226 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1227 types_match = decls_match (newdecl, olddecl);
1229 return duplicate_decls (newdecl, olddecl,
1231 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1234 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1237 else if ((DECL_EXTERN_C_P (newdecl)
1238 && DECL_EXTERN_C_P (olddecl))
1239 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1240 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1242 /* A near match; override the builtin. */
1244 if (TREE_PUBLIC (newdecl))
1246 warning (0, "new declaration %q#D", newdecl);
1247 warning (0, "ambiguates built-in declaration %q#D",
1251 warning (OPT_Wshadow, "shadowing %s function %q#D",
1252 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1256 /* Discard the old built-in function. */
1259 /* Replace the old RTL to avoid problems with inlining. */
1260 COPY_DECL_RTL (newdecl, olddecl);
1262 /* Even if the types match, prefer the new declarations type for
1263 built-ins which have not been explicitly declared, for
1264 exception lists, etc... */
1265 else if (DECL_ANTICIPATED (olddecl))
1267 tree type = TREE_TYPE (newdecl);
1268 tree attribs = (*targetm.merge_type_attributes)
1269 (TREE_TYPE (olddecl), type);
1271 type = cp_build_type_attribute_variant (type, attribs);
1272 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1275 /* If a function is explicitly declared "throw ()", propagate that to
1276 the corresponding builtin. */
1277 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1278 && DECL_ANTICIPATED (olddecl)
1279 && TREE_NOTHROW (newdecl)
1280 && !TREE_NOTHROW (olddecl)
1281 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1282 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1284 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1286 /* Whether or not the builtin can throw exceptions has no
1287 bearing on this declarator. */
1288 TREE_NOTHROW (olddecl) = 0;
1290 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1292 /* If a builtin function is redeclared as `static', merge
1293 the declarations, but make the original one static. */
1294 DECL_THIS_STATIC (olddecl) = 1;
1295 TREE_PUBLIC (olddecl) = 0;
1297 /* Make the old declaration consistent with the new one so
1298 that all remnants of the builtin-ness of this function
1299 will be banished. */
1300 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1301 COPY_DECL_RTL (newdecl, olddecl);
1304 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1306 /* C++ Standard, 3.3, clause 4:
1307 "[Note: a namespace name or a class template name must be unique
1308 in its declarative region (7.3.2, clause 14). ]" */
1309 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1310 && TREE_CODE (newdecl) != NAMESPACE_DECL
1311 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1312 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1313 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1314 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1316 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1317 && TREE_CODE (newdecl) != TYPE_DECL)
1318 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1319 && TREE_CODE (olddecl) != TYPE_DECL))
1321 /* We do nothing special here, because C++ does such nasty
1322 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1323 get shadowed, and know that if we need to find a TYPE_DECL
1324 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1325 slot of the identifier. */
1329 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1330 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1331 || (TREE_CODE (olddecl) == FUNCTION_DECL
1332 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1336 error ("%q#D redeclared as different kind of symbol", newdecl);
1337 if (TREE_CODE (olddecl) == TREE_LIST)
1338 olddecl = TREE_VALUE (olddecl);
1339 error ("previous declaration of %q+#D", olddecl);
1341 return error_mark_node;
1343 else if (!types_match)
1345 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1346 /* These are certainly not duplicate declarations; they're
1347 from different scopes. */
1350 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1352 /* The name of a class template may not be declared to refer to
1353 any other template, class, function, object, namespace, value,
1354 or type in the same scope. */
1355 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1356 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1358 error ("declaration of template %q#D", newdecl);
1359 error ("conflicts with previous declaration %q+#D", olddecl);
1361 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1362 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1363 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1364 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1365 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1366 DECL_TEMPLATE_PARMS (olddecl))
1367 /* Template functions can be disambiguated by
1369 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1370 TREE_TYPE (TREE_TYPE (olddecl))))
1372 error ("new declaration %q#D", newdecl);
1373 error ("ambiguates old declaration %q+#D", olddecl);
1377 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1379 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1381 error ("declaration of C function %q#D conflicts with",
1383 error ("previous declaration %q+#D here", olddecl);
1385 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1386 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1388 error ("new declaration %q#D", newdecl);
1389 error ("ambiguates old declaration %q+#D", olddecl);
1390 return error_mark_node;
1397 error ("conflicting declaration %q#D", newdecl);
1398 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1399 return error_mark_node;
1402 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1403 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1404 && (!DECL_TEMPLATE_INFO (newdecl)
1405 || (DECL_TI_TEMPLATE (newdecl)
1406 != DECL_TI_TEMPLATE (olddecl))))
1407 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1408 && (!DECL_TEMPLATE_INFO (olddecl)
1409 || (DECL_TI_TEMPLATE (olddecl)
1410 != DECL_TI_TEMPLATE (newdecl))))))
1411 /* It's OK to have a template specialization and a non-template
1412 with the same type, or to have specializations of two
1413 different templates with the same type. Note that if one is a
1414 specialization, and the other is an instantiation of the same
1415 template, that we do not exit at this point. That situation
1416 can occur if we instantiate a template class, and then
1417 specialize one of its methods. This situation is valid, but
1418 the declarations must be merged in the usual way. */
1420 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1421 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1422 && !DECL_USE_TEMPLATE (newdecl))
1423 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1424 && !DECL_USE_TEMPLATE (olddecl))))
1425 /* One of the declarations is a template instantiation, and the
1426 other is not a template at all. That's OK. */
1428 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1430 /* In [namespace.alias] we have:
1432 In a declarative region, a namespace-alias-definition can be
1433 used to redefine a namespace-alias declared in that declarative
1434 region to refer only to the namespace to which it already
1437 Therefore, if we encounter a second alias directive for the same
1438 alias, we can just ignore the second directive. */
1439 if (DECL_NAMESPACE_ALIAS (newdecl)
1440 && (DECL_NAMESPACE_ALIAS (newdecl)
1441 == DECL_NAMESPACE_ALIAS (olddecl)))
1443 /* [namespace.alias]
1445 A namespace-name or namespace-alias shall not be declared as
1446 the name of any other entity in the same declarative region.
1447 A namespace-name defined at global scope shall not be
1448 declared as the name of any other entity in any global scope
1450 error ("declaration of namespace %qD conflicts with", newdecl);
1451 error ("previous declaration of namespace %q+D here", olddecl);
1452 return error_mark_node;
1456 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1459 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1460 if (DECL_NAME (olddecl) != NULL_TREE)
1461 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1462 ? "%q+#D previously defined here"
1463 : "%q+#D previously declared here", olddecl);
1464 return error_mark_node;
1466 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1467 && DECL_INITIAL (olddecl) != NULL_TREE
1468 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1469 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1471 /* Prototype decl follows defn w/o prototype. */
1472 warning (0, "prototype for %q+#D", newdecl);
1473 warning (0, "%Jfollows non-prototype definition here", olddecl);
1475 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1476 || TREE_CODE (olddecl) == VAR_DECL)
1477 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1480 If two declarations of the same function or object
1481 specify different linkage-specifications ..., the program
1482 is ill-formed.... Except for functions with C++ linkage,
1483 a function declaration without a linkage specification
1484 shall not precede the first linkage specification for
1485 that function. A function can be declared without a
1486 linkage specification after an explicit linkage
1487 specification has been seen; the linkage explicitly
1488 specified in the earlier declaration is not affected by
1489 such a function declaration.
1491 DR 563 raises the question why the restrictions on
1492 functions should not also apply to objects. Older
1493 versions of G++ silently ignore the linkage-specification
1501 which is clearly wrong. Therefore, we now treat objects
1503 if (current_lang_depth () == 0)
1505 /* There is no explicit linkage-specification, so we use
1506 the linkage from the previous declaration. */
1507 if (!DECL_LANG_SPECIFIC (newdecl))
1508 retrofit_lang_decl (newdecl);
1509 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1513 error ("previous declaration of %q+#D with %qL linkage",
1514 olddecl, DECL_LANGUAGE (olddecl));
1515 error ("conflicts with new declaration with %qL linkage",
1516 DECL_LANGUAGE (newdecl));
1520 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1522 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1524 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1525 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1528 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1529 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1531 for (; t1 && t1 != void_list_node;
1532 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1533 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1535 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1538 permerror (input_location, "default argument given for parameter %d of %q#D",
1540 permerror (input_location, "after previous specification in %q+#D", olddecl);
1544 error ("default argument given for parameter %d of %q#D",
1546 error ("after previous specification in %q+#D",
1553 /* Do not merge an implicit typedef with an explicit one. In:
1557 typedef class A A __attribute__ ((foo));
1559 the attribute should apply only to the typedef. */
1560 if (TREE_CODE (olddecl) == TYPE_DECL
1561 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1562 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1565 /* If new decl is `static' and an `extern' was seen previously,
1567 warn_extern_redeclared_static (newdecl, olddecl);
1569 /* We have committed to returning 1 at this point. */
1570 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1572 /* Now that functions must hold information normally held
1573 by field decls, there is extra work to do so that
1574 declaration information does not get destroyed during
1576 if (DECL_VINDEX (olddecl))
1577 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1578 if (DECL_CONTEXT (olddecl))
1579 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1580 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1581 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1582 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1583 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1584 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1585 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1586 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1587 SET_OVERLOADED_OPERATOR_CODE
1588 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1589 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1591 /* Optionally warn about more than one declaration for the same
1592 name, but don't warn about a function declaration followed by a
1594 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1595 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1596 /* Don't warn about extern decl followed by definition. */
1597 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1598 /* Don't warn about friends, let add_friend take care of it. */
1599 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1601 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1602 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1605 if (DECL_DELETED_FN (newdecl))
1607 error ("deleted definition of %qD", newdecl);
1608 error ("after previous declaration %q+D", olddecl);
1612 /* Deal with C++: must preserve virtual function table size. */
1613 if (TREE_CODE (olddecl) == TYPE_DECL)
1615 tree newtype = TREE_TYPE (newdecl);
1616 tree oldtype = TREE_TYPE (olddecl);
1618 if (newtype != error_mark_node && oldtype != error_mark_node
1619 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1620 CLASSTYPE_FRIEND_CLASSES (newtype)
1621 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1623 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1626 /* Copy all the DECL_... slots specified in the new decl
1627 except for any that we copy here from the old type. */
1628 DECL_ATTRIBUTES (newdecl)
1629 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1631 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1635 old_result = DECL_TEMPLATE_RESULT (olddecl);
1636 new_result = DECL_TEMPLATE_RESULT (newdecl);
1637 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1638 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1639 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1640 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1642 DECL_ATTRIBUTES (old_result)
1643 = (*targetm.merge_decl_attributes) (old_result, new_result);
1645 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1647 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1648 && DECL_INITIAL (new_result))
1650 if (DECL_INITIAL (old_result))
1651 DECL_UNINLINABLE (old_result) = 1;
1653 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1654 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1655 DECL_NOT_REALLY_EXTERN (old_result)
1656 = DECL_NOT_REALLY_EXTERN (new_result);
1657 DECL_INTERFACE_KNOWN (old_result)
1658 = DECL_INTERFACE_KNOWN (new_result);
1659 DECL_DECLARED_INLINE_P (old_result)
1660 = DECL_DECLARED_INLINE_P (new_result);
1661 DECL_DISREGARD_INLINE_LIMITS (old_result)
1662 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1667 DECL_DECLARED_INLINE_P (old_result)
1668 |= DECL_DECLARED_INLINE_P (new_result);
1669 DECL_DISREGARD_INLINE_LIMITS (old_result)
1670 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1671 check_redeclaration_exception_specification (newdecl, olddecl);
1675 /* If the new declaration is a definition, update the file and
1676 line information on the declaration, and also make
1677 the old declaration the same definition. */
1678 if (DECL_INITIAL (new_result) != NULL_TREE)
1680 DECL_SOURCE_LOCATION (olddecl)
1681 = DECL_SOURCE_LOCATION (old_result)
1682 = DECL_SOURCE_LOCATION (newdecl);
1683 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1684 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1687 DECL_ARGUMENTS (old_result)
1688 = DECL_ARGUMENTS (new_result);
1689 for (parm = DECL_ARGUMENTS (old_result); parm;
1690 parm = TREE_CHAIN (parm))
1691 DECL_CONTEXT (parm) = old_result;
1700 /* Automatically handles default parameters. */
1701 tree oldtype = TREE_TYPE (olddecl);
1704 /* Merge the data types specified in the two decls. */
1705 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1707 /* If merge_types produces a non-typedef type, just use the old type. */
1708 if (TREE_CODE (newdecl) == TYPE_DECL
1709 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1712 if (TREE_CODE (newdecl) == VAR_DECL)
1714 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1715 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1716 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1717 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1718 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1719 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1721 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1722 if (DECL_LANG_SPECIFIC (olddecl)
1723 && CP_DECL_THREADPRIVATE_P (olddecl))
1725 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1726 if (!DECL_LANG_SPECIFIC (newdecl))
1727 retrofit_lang_decl (newdecl);
1729 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1730 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1734 /* Do this after calling `merge_types' so that default
1735 parameters don't confuse us. */
1736 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1737 check_redeclaration_exception_specification (newdecl, olddecl);
1738 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1740 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1741 check_default_args (newdecl);
1743 /* Lay the type out, unless already done. */
1744 if (! same_type_p (newtype, oldtype)
1745 && TREE_TYPE (newdecl) != error_mark_node
1746 && !(processing_template_decl && uses_template_parms (newdecl)))
1747 layout_type (TREE_TYPE (newdecl));
1749 if ((TREE_CODE (newdecl) == VAR_DECL
1750 || TREE_CODE (newdecl) == PARM_DECL
1751 || TREE_CODE (newdecl) == RESULT_DECL
1752 || TREE_CODE (newdecl) == FIELD_DECL
1753 || TREE_CODE (newdecl) == TYPE_DECL)
1754 && !(processing_template_decl && uses_template_parms (newdecl)))
1755 layout_decl (newdecl, 0);
1757 /* Merge the type qualifiers. */
1758 if (TREE_READONLY (newdecl))
1759 TREE_READONLY (olddecl) = 1;
1760 if (TREE_THIS_VOLATILE (newdecl))
1761 TREE_THIS_VOLATILE (olddecl) = 1;
1762 if (TREE_NOTHROW (newdecl))
1763 TREE_NOTHROW (olddecl) = 1;
1765 /* Merge deprecatedness. */
1766 if (TREE_DEPRECATED (newdecl))
1767 TREE_DEPRECATED (olddecl) = 1;
1769 /* Preserve function specific target and optimization options */
1770 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1772 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1773 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1774 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1775 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1777 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1778 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1779 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1780 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1783 /* Merge the initialization information. */
1784 if (DECL_INITIAL (newdecl) == NULL_TREE
1785 && DECL_INITIAL (olddecl) != NULL_TREE)
1787 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1788 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1789 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1790 && DECL_LANG_SPECIFIC (newdecl)
1791 && DECL_LANG_SPECIFIC (olddecl))
1793 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1794 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1798 /* Merge the section attribute.
1799 We want to issue an error if the sections conflict but that must be
1800 done later in decl_attributes since we are called before attributes
1802 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1803 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1805 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1807 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1808 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1809 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1810 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1811 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1812 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1813 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1814 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1815 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1816 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1817 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1818 /* Keep the old RTL. */
1819 COPY_DECL_RTL (olddecl, newdecl);
1821 else if (TREE_CODE (newdecl) == VAR_DECL
1822 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1824 /* Keep the old RTL. We cannot keep the old RTL if the old
1825 declaration was for an incomplete object and the new
1826 declaration is not since many attributes of the RTL will
1828 COPY_DECL_RTL (olddecl, newdecl);
1831 /* If cannot merge, then use the new type and qualifiers,
1832 and don't preserve the old rtl. */
1835 /* Clean out any memory we had of the old declaration. */
1836 tree oldstatic = value_member (olddecl, static_aggregates);
1838 TREE_VALUE (oldstatic) = error_mark_node;
1840 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1841 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1842 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1843 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1846 /* Merge the storage class information. */
1847 merge_weak (newdecl, olddecl);
1849 if (DECL_ONE_ONLY (olddecl))
1850 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1852 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1853 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1854 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1855 if (! DECL_EXTERNAL (olddecl))
1856 DECL_EXTERNAL (newdecl) = 0;
1858 new_template = NULL_TREE;
1859 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1861 bool new_redefines_gnu_inline = false;
1863 if (new_defines_function
1864 && ((DECL_INTERFACE_KNOWN (olddecl)
1865 && TREE_CODE (olddecl) == FUNCTION_DECL)
1866 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1867 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1868 == FUNCTION_DECL))))
1872 if (TREE_CODE (fn) == TEMPLATE_DECL)
1873 fn = DECL_TEMPLATE_RESULT (olddecl);
1875 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1878 if (!new_redefines_gnu_inline)
1880 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1881 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1882 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1884 DECL_TEMPLATE_INSTANTIATED (newdecl)
1885 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1887 /* If the OLDDECL is an instantiation and/or specialization,
1888 then the NEWDECL must be too. But, it may not yet be marked
1889 as such if the caller has created NEWDECL, but has not yet
1890 figured out that it is a redeclaration. */
1891 if (!DECL_USE_TEMPLATE (newdecl))
1892 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1894 /* Don't really know how much of the language-specific
1895 values we should copy from old to new. */
1896 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1897 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1898 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1899 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1900 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1901 if (DECL_TEMPLATE_INFO (newdecl))
1902 new_template = DECL_TI_TEMPLATE (newdecl);
1903 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1904 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1905 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1906 olddecl_friend = DECL_FRIEND_P (olddecl);
1907 hidden_friend = (DECL_ANTICIPATED (olddecl)
1908 && DECL_HIDDEN_FRIEND_P (olddecl)
1909 && newdecl_is_friend);
1911 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1912 if (TREE_CODE (newdecl) == FUNCTION_DECL
1913 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1915 DECL_BEFRIENDING_CLASSES (newdecl)
1916 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1917 DECL_BEFRIENDING_CLASSES (olddecl));
1918 /* DECL_THUNKS is only valid for virtual functions,
1919 otherwise it is a DECL_FRIEND_CONTEXT. */
1920 if (DECL_VIRTUAL_P (newdecl))
1921 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1925 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1929 /* Merge parameter attributes. */
1930 tree oldarg, newarg;
1931 for (oldarg = DECL_ARGUMENTS(olddecl),
1932 newarg = DECL_ARGUMENTS(newdecl);
1934 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1935 DECL_ATTRIBUTES (newarg)
1936 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1937 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1940 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1941 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1943 /* If newdecl is not a specialization, then it is not a
1944 template-related function at all. And that means that we
1945 should have exited above, returning 0. */
1946 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1948 if (TREE_USED (olddecl))
1949 /* From [temp.expl.spec]:
1951 If a template, a member template or the member of a class
1952 template is explicitly specialized then that
1953 specialization shall be declared before the first use of
1954 that specialization that would cause an implicit
1955 instantiation to take place, in every translation unit in
1956 which such a use occurs. */
1957 error ("explicit specialization of %qD after first use",
1960 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1962 /* Don't propagate visibility from the template to the
1963 specialization here. We'll do that in determine_visibility if
1965 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1967 /* [temp.expl.spec/14] We don't inline explicit specialization
1968 just because the primary template says so. */
1970 else if (new_defines_function && DECL_INITIAL (olddecl))
1972 /* Never inline re-defined extern inline functions.
1973 FIXME: this could be better handled by keeping both
1974 function as separate declarations. */
1975 DECL_UNINLINABLE (newdecl) = 1;
1979 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1980 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1982 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1984 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1985 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1987 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1988 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1989 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1990 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1993 /* Preserve abstractness on cloned [cd]tors. */
1994 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1996 /* Update newdecl's parms to point at olddecl. */
1997 for (parm = DECL_ARGUMENTS (newdecl); parm;
1998 parm = TREE_CHAIN (parm))
1999 DECL_CONTEXT (parm) = olddecl;
2003 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2004 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2005 COPY_DECL_RTL (newdecl, olddecl);
2007 if (! types_match || new_defines_function)
2009 /* These need to be copied so that the names are available.
2010 Note that if the types do match, we'll preserve inline
2011 info and other bits, but if not, we won't. */
2012 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2013 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2015 if (new_defines_function)
2016 /* If defining a function declared with other language
2017 linkage, use the previously declared language linkage. */
2018 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2019 else if (types_match)
2021 /* If redeclaring a builtin function, and not a definition,
2022 it stays built in. */
2023 if (DECL_BUILT_IN (olddecl))
2025 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2026 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2027 /* If we're keeping the built-in definition, keep the rtl,
2028 regardless of declaration matches. */
2029 COPY_DECL_RTL (olddecl, newdecl);
2032 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2033 /* Don't clear out the arguments if we're just redeclaring a
2035 if (DECL_ARGUMENTS (olddecl))
2036 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2039 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2040 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2042 /* Now preserve various other info from the definition. */
2043 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2044 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2045 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2046 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2048 /* Warn about conflicting visibility specifications. */
2049 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2050 && DECL_VISIBILITY_SPECIFIED (newdecl)
2051 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2053 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2054 "because it", newdecl);
2055 warning (OPT_Wattributes, "%Jconflicts with previous "
2056 "declaration here", olddecl);
2058 /* Choose the declaration which specified visibility. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2061 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2062 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2064 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2065 so keep this behavior. */
2066 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2068 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2069 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2072 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2073 with that from NEWDECL below. */
2074 if (DECL_LANG_SPECIFIC (olddecl))
2076 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2077 != DECL_LANG_SPECIFIC (newdecl));
2078 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2081 /* Merge the USED information. */
2082 if (TREE_USED (olddecl))
2083 TREE_USED (newdecl) = 1;
2084 else if (TREE_USED (newdecl))
2085 TREE_USED (olddecl) = 1;
2087 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2091 function_size = sizeof (struct tree_decl_common);
2093 memcpy ((char *) olddecl + sizeof (struct tree_common),
2094 (char *) newdecl + sizeof (struct tree_common),
2095 function_size - sizeof (struct tree_common));
2097 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2098 (char *) newdecl + sizeof (struct tree_decl_common),
2099 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2101 /* If newdecl is a template instantiation, it is possible that
2102 the following sequence of events has occurred:
2104 o A friend function was declared in a class template. The
2105 class template was instantiated.
2107 o The instantiation of the friend declaration was
2108 recorded on the instantiation list, and is newdecl.
2110 o Later, however, instantiate_class_template called pushdecl
2111 on the newdecl to perform name injection. But, pushdecl in
2112 turn called duplicate_decls when it discovered that another
2113 declaration of a global function with the same name already
2116 o Here, in duplicate_decls, we decided to clobber newdecl.
2118 If we're going to do that, we'd better make sure that
2119 olddecl, and not newdecl, is on the list of
2120 instantiations so that if we try to do the instantiation
2121 again we won't get the clobbered declaration. */
2122 reregister_specialization (newdecl,
2128 size_t size = tree_code_size (TREE_CODE (olddecl));
2129 memcpy ((char *) olddecl + sizeof (struct tree_common),
2130 (char *) newdecl + sizeof (struct tree_common),
2131 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2132 switch (TREE_CODE (olddecl))
2142 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2143 (char *) newdecl + sizeof (struct tree_decl_common),
2144 size - sizeof (struct tree_decl_common)
2145 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2149 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2150 (char *) newdecl + sizeof (struct tree_decl_common),
2151 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2152 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2156 DECL_UID (olddecl) = olddecl_uid;
2158 DECL_FRIEND_P (olddecl) = 1;
2161 DECL_ANTICIPATED (olddecl) = 1;
2162 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2165 /* NEWDECL contains the merged attribute lists.
2166 Update OLDDECL to be the same. */
2167 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2169 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2170 so that encode_section_info has a chance to look at the new decl
2171 flags and attributes. */
2172 if (DECL_RTL_SET_P (olddecl)
2173 && (TREE_CODE (olddecl) == FUNCTION_DECL
2174 || (TREE_CODE (olddecl) == VAR_DECL
2175 && TREE_STATIC (olddecl))))
2176 make_decl_rtl (olddecl);
2178 /* The NEWDECL will no longer be needed. Because every out-of-class
2179 declaration of a member results in a call to duplicate_decls,
2180 freeing these nodes represents in a significant savings. */
2186 /* Return zero if the declaration NEWDECL is valid
2187 when the declaration OLDDECL (assumed to be for the same name)
2188 has already been seen.
2189 Otherwise return an error message format string with a %s
2190 where the identifier should go. */
2193 redeclaration_error_message (tree newdecl, tree olddecl)
2195 if (TREE_CODE (newdecl) == TYPE_DECL)
2197 /* Because C++ can put things into name space for free,
2198 constructs like "typedef struct foo { ... } foo"
2199 would look like an erroneous redeclaration. */
2200 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2203 return "redefinition of %q#D";
2205 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2207 /* If this is a pure function, its olddecl will actually be
2208 the original initialization to `0' (which we force to call
2209 abort()). Don't complain about redefinition in this case. */
2210 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2211 && DECL_INITIAL (olddecl) == NULL_TREE)
2214 /* If both functions come from different namespaces, this is not
2215 a redeclaration - this is a conflict with a used function. */
2216 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2217 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2218 && ! decls_match (olddecl, newdecl))
2219 return "%qD conflicts with used function";
2221 /* We'll complain about linkage mismatches in
2222 warn_extern_redeclared_static. */
2224 /* Defining the same name twice is no good. */
2225 if (DECL_INITIAL (olddecl) != NULL_TREE
2226 && DECL_INITIAL (newdecl) != NULL_TREE)
2228 if (DECL_NAME (olddecl) == NULL_TREE)
2229 return "%q#D not declared in class";
2230 else if (!GNU_INLINE_P (olddecl)
2231 || GNU_INLINE_P (newdecl))
2232 return "redefinition of %q#D";
2235 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2237 bool olda = GNU_INLINE_P (olddecl);
2238 bool newa = GNU_INLINE_P (newdecl);
2243 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2245 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2251 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2255 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2257 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2258 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2259 return "redefinition of %q#D";
2263 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2264 || (DECL_TEMPLATE_RESULT (newdecl)
2265 == DECL_TEMPLATE_RESULT (olddecl)))
2268 nt = DECL_TEMPLATE_RESULT (newdecl);
2269 if (DECL_TEMPLATE_INFO (nt))
2270 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2271 ot = DECL_TEMPLATE_RESULT (olddecl);
2272 if (DECL_TEMPLATE_INFO (ot))
2273 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2274 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2275 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2276 return "redefinition of %q#D";
2278 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2280 bool olda = GNU_INLINE_P (ot);
2281 bool newa = GNU_INLINE_P (nt);
2286 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2288 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2292 /* Core issue #226 (C++0x):
2294 If a friend function template declaration specifies a
2295 default template-argument, that declaration shall be a
2296 definition and shall be the only declaration of the
2297 function template in the translation unit. */
2298 if ((cxx_dialect != cxx98)
2299 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2300 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2301 /*is_primary=*/1, /*is_partial=*/0,
2302 /*is_friend_decl=*/2))
2303 return "redeclaration of friend %q#D may not have default template arguments";
2307 else if (TREE_CODE (newdecl) == VAR_DECL
2308 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2309 && (! DECL_LANG_SPECIFIC (olddecl)
2310 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2311 || DECL_THREAD_LOCAL_P (newdecl)))
2313 /* Only variables can be thread-local, and all declarations must
2314 agree on this property. */
2315 if (DECL_THREAD_LOCAL_P (newdecl))
2316 return "thread-local declaration of %q#D follows "
2317 "non-thread-local declaration";
2319 return "non-thread-local declaration of %q#D follows "
2320 "thread-local declaration";
2322 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2324 /* The objects have been declared at namespace scope. If either
2325 is a member of an anonymous union, then this is an invalid
2326 redeclaration. For example:
2332 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2333 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2334 return "redeclaration of %q#D";
2335 /* If at least one declaration is a reference, there is no
2336 conflict. For example:
2342 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2344 /* Reject two definitions. */
2345 return "redefinition of %q#D";
2349 /* Objects declared with block scope: */
2350 /* Reject two definitions, and reject a definition
2351 together with an external reference. */
2352 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2353 return "redeclaration of %q#D";
2358 /* Hash and equality functions for the named_label table. */
2361 named_label_entry_hash (const void *data)
2363 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2364 return DECL_UID (ent->label_decl);
2368 named_label_entry_eq (const void *a, const void *b)
2370 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2371 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2372 return ent_a->label_decl == ent_b->label_decl;
2375 /* Create a new label, named ID. */
2378 make_label_decl (tree id, int local_p)
2380 struct named_label_entry *ent;
2384 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2386 DECL_CONTEXT (decl) = current_function_decl;
2387 DECL_MODE (decl) = VOIDmode;
2388 C_DECLARED_LABEL_FLAG (decl) = local_p;
2390 /* Say where one reference is to the label, for the sake of the
2391 error if it is not defined. */
2392 DECL_SOURCE_LOCATION (decl) = input_location;
2394 /* Record the fact that this identifier is bound to this label. */
2395 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2397 /* Create the label htab for the function on demand. */
2399 named_labels = htab_create_ggc (13, named_label_entry_hash,
2400 named_label_entry_eq, NULL);
2402 /* Record this label on the list of labels used in this function.
2403 We do this before calling make_label_decl so that we get the
2404 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2405 ent = GGC_CNEW (struct named_label_entry);
2406 ent->label_decl = decl;
2408 slot = htab_find_slot (named_labels, ent, INSERT);
2409 gcc_assert (*slot == NULL);
2415 /* Look for a label named ID in the current function. If one cannot
2416 be found, create one. (We keep track of used, but undefined,
2417 labels, and complain about them at the end of a function.) */
2420 lookup_label (tree id)
2424 timevar_push (TV_NAME_LOOKUP);
2425 /* You can't use labels at global scope. */
2426 if (current_function_decl == NULL_TREE)
2428 error ("label %qE referenced outside of any function", id);
2429 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2432 /* See if we've already got this label. */
2433 decl = IDENTIFIER_LABEL_VALUE (id);
2434 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2435 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2437 decl = make_label_decl (id, /*local_p=*/0);
2438 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2441 /* Declare a local label named ID. */
2444 declare_local_label (tree id)
2448 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2449 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2450 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2451 current_binding_level->shadowed_labels);
2452 current_binding_level->shadowed_labels = shadow;
2454 decl = make_label_decl (id, /*local_p=*/1);
2455 TREE_VALUE (shadow) = decl;
2460 /* Returns nonzero if it is ill-formed to jump past the declaration of
2461 DECL. Returns 2 if it's also a real problem. */
2464 decl_jump_unsafe (tree decl)
2466 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2467 || TREE_TYPE (decl) == error_mark_node)
2470 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2471 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2474 if (pod_type_p (TREE_TYPE (decl)))
2477 /* The POD stuff is just pedantry; why should it matter if the class
2478 contains a field of pointer to member type? */
2482 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2485 identify_goto (tree decl, const location_t *locus)
2488 permerror (input_location, "jump to label %qD", decl);
2490 permerror (input_location, "jump to case label");
2492 permerror (input_location, "%H from here", locus);
2495 /* Check that a single previously seen jump to a newly defined label
2496 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2497 the jump context; NAMES are the names in scope in LEVEL at the jump
2498 context; LOCUS is the source position of the jump or 0. Returns
2499 true if all is well. */
2502 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2503 bool exited_omp, const location_t *locus)
2505 struct cp_binding_level *b;
2506 bool identified = false, saw_eh = false, saw_omp = false;
2510 identify_goto (decl, locus);
2511 error (" exits OpenMP structured block");
2512 identified = saw_omp = true;
2515 for (b = current_binding_level; b ; b = b->level_chain)
2517 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2519 for (new_decls = b->names; new_decls != old_decls;
2520 new_decls = TREE_CHAIN (new_decls))
2522 int problem = decl_jump_unsafe (new_decls);
2528 identify_goto (decl, locus);
2532 error (" crosses initialization of %q+#D", new_decls);
2534 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2539 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2543 identify_goto (decl, locus);
2546 if (b->kind == sk_try)
2547 error (" enters try block");
2549 error (" enters catch block");
2552 if (b->kind == sk_omp && !saw_omp)
2556 identify_goto (decl, locus);
2559 error (" enters OpenMP structured block");
2568 check_previous_goto (tree decl, struct named_label_use_entry *use)
2570 check_previous_goto_1 (decl, use->binding_level,
2571 use->names_in_scope, use->in_omp_scope,
2572 &use->o_goto_locus);
2576 check_switch_goto (struct cp_binding_level* level)
2578 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2581 /* Check that a new jump to a label DECL is OK. Called by
2582 finish_goto_stmt. */
2585 check_goto (tree decl)
2587 struct named_label_entry *ent, dummy;
2588 bool saw_catch = false, identified = false;
2591 /* We can't know where a computed goto is jumping.
2592 So we assume that it's OK. */
2593 if (TREE_CODE (decl) != LABEL_DECL)
2596 /* We didn't record any information about this label when we created it,
2597 and there's not much point since it's trivial to analyze as a return. */
2598 if (decl == cdtor_label)
2601 dummy.label_decl = decl;
2602 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2603 gcc_assert (ent != NULL);
2605 /* If the label hasn't been defined yet, defer checking. */
2606 if (! DECL_INITIAL (decl))
2608 struct named_label_use_entry *new_use;
2610 /* Don't bother creating another use if the last goto had the
2611 same data, and will therefore create the same set of errors. */
2613 && ent->uses->names_in_scope == current_binding_level->names)
2616 new_use = GGC_NEW (struct named_label_use_entry);
2617 new_use->binding_level = current_binding_level;
2618 new_use->names_in_scope = current_binding_level->names;
2619 new_use->o_goto_locus = input_location;
2620 new_use->in_omp_scope = false;
2622 new_use->next = ent->uses;
2623 ent->uses = new_use;
2627 if (ent->in_try_scope || ent->in_catch_scope
2628 || ent->in_omp_scope || ent->bad_decls)
2630 permerror (input_location, "jump to label %q+D", decl);
2631 permerror (input_location, " from here");
2635 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2637 tree b = TREE_VALUE (bad);
2638 int u = decl_jump_unsafe (b);
2640 if (u > 1 && DECL_ARTIFICIAL (b))
2642 /* Can't skip init of __exception_info. */
2643 error ("%J enters catch block", b);
2647 error (" skips initialization of %q+#D", b);
2649 permerror (input_location, " enters scope of non-POD %q+#D", b);
2652 if (ent->in_try_scope)
2653 error (" enters try block");
2654 else if (ent->in_catch_scope && !saw_catch)
2655 error (" enters catch block");
2657 if (ent->in_omp_scope)
2658 error (" enters OpenMP structured block");
2659 else if (flag_openmp)
2661 struct cp_binding_level *b;
2662 for (b = current_binding_level; b ; b = b->level_chain)
2664 if (b == ent->binding_level)
2666 if (b->kind == sk_omp)
2670 permerror (input_location, "jump to label %q+D", decl);
2671 permerror (input_location, " from here");
2674 error (" exits OpenMP structured block");
2681 /* Check that a return is ok wrt OpenMP structured blocks.
2682 Called by finish_return_stmt. Returns true if all is well. */
2685 check_omp_return (void)
2687 struct cp_binding_level *b;
2688 for (b = current_binding_level; b ; b = b->level_chain)
2689 if (b->kind == sk_omp)
2691 error ("invalid exit from OpenMP structured block");
2697 /* Define a label, specifying the location in the source file.
2698 Return the LABEL_DECL node for the label. */
2701 define_label (location_t location, tree name)
2703 struct named_label_entry *ent, dummy;
2704 struct cp_binding_level *p;
2707 timevar_push (TV_NAME_LOOKUP);
2709 decl = lookup_label (name);
2711 dummy.label_decl = decl;
2712 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2713 gcc_assert (ent != NULL);
2715 /* After labels, make any new cleanups in the function go into their
2716 own new (temporary) binding contour. */
2717 for (p = current_binding_level;
2718 p->kind != sk_function_parms;
2720 p->more_cleanups_ok = 0;
2722 if (name == get_identifier ("wchar_t"))
2723 permerror (input_location, "label named wchar_t");
2725 if (DECL_INITIAL (decl) != NULL_TREE)
2727 error ("duplicate label %qD", decl);
2728 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2732 struct named_label_use_entry *use;
2734 /* Mark label as having been defined. */
2735 DECL_INITIAL (decl) = error_mark_node;
2736 /* Say where in the source. */
2737 DECL_SOURCE_LOCATION (decl) = location;
2739 ent->binding_level = current_binding_level;
2740 ent->names_in_scope = current_binding_level->names;
2742 for (use = ent->uses; use ; use = use->next)
2743 check_previous_goto (decl, use);
2747 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2752 struct cp_binding_level *level;
2753 struct cp_switch *next;
2754 /* The SWITCH_STMT being built. */
2756 /* A splay-tree mapping the low element of a case range to the high
2757 element, or NULL_TREE if there is no high element. Used to
2758 determine whether or not a new case label duplicates an old case
2759 label. We need a tree, rather than simply a hash table, because
2760 of the GNU case range extension. */
2764 /* A stack of the currently active switch statements. The innermost
2765 switch statement is on the top of the stack. There is no need to
2766 mark the stack for garbage collection because it is only active
2767 during the processing of the body of a function, and we never
2768 collect at that point. */
2770 static struct cp_switch *switch_stack;
2772 /* Called right after a switch-statement condition is parsed.
2773 SWITCH_STMT is the switch statement being parsed. */
2776 push_switch (tree switch_stmt)
2778 struct cp_switch *p = XNEW (struct cp_switch);
2779 p->level = current_binding_level;
2780 p->next = switch_stack;
2781 p->switch_stmt = switch_stmt;
2782 p->cases = splay_tree_new (case_compare, NULL, NULL);
2789 struct cp_switch *cs = switch_stack;
2790 location_t switch_location;
2792 /* Emit warnings as needed. */
2793 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2794 switch_location = EXPR_LOCATION (cs->switch_stmt);
2796 switch_location = input_location;
2797 if (!processing_template_decl)
2798 c_do_switch_warnings (cs->cases, switch_location,
2799 SWITCH_STMT_TYPE (cs->switch_stmt),
2800 SWITCH_STMT_COND (cs->switch_stmt));
2802 splay_tree_delete (cs->cases);
2803 switch_stack = switch_stack->next;
2807 /* Note that we've seen a definition of a case label, and complain if this
2808 is a bad place for one. */
2811 finish_case_label (location_t loc, tree low_value, tree high_value)
2814 struct cp_binding_level *p;
2816 if (processing_template_decl)
2820 /* For templates, just add the case label; we'll do semantic
2821 analysis at instantiation-time. */
2822 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2823 return add_stmt (build_case_label (loc, low_value, high_value, label));
2826 /* Find the condition on which this switch statement depends. */
2827 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2828 if (cond && TREE_CODE (cond) == TREE_LIST)
2829 cond = TREE_VALUE (cond);
2831 if (!check_switch_goto (switch_stack->level))
2832 return error_mark_node;
2834 r = c_add_case_label (loc, switch_stack->cases, cond,
2835 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2836 low_value, high_value);
2838 /* After labels, make any new cleanups in the function go into their
2839 own new (temporary) binding contour. */
2840 for (p = current_binding_level;
2841 p->kind != sk_function_parms;
2843 p->more_cleanups_ok = 0;
2848 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2851 typename_hash (const void* k)
2854 const_tree const t = (const_tree) k;
2856 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2857 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2862 typedef struct typename_info {
2870 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2871 really of type `typename_info*' */
2874 typename_compare (const void * k1, const void * k2)
2876 const_tree const t1 = (const_tree) k1;
2877 const typename_info *const t2 = (const typename_info *) k2;
2879 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2880 && TYPE_CONTEXT (t1) == t2->scope
2881 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2882 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2883 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2886 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2887 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2889 Returns the new TYPENAME_TYPE. */
2891 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2894 build_typename_type (tree context, tree name, tree fullname,
2895 enum tag_types tag_type)
2903 if (typename_htab == NULL)
2904 typename_htab = htab_create_ggc (61, &typename_hash,
2905 &typename_compare, NULL);
2907 ti.scope = FROB_CONTEXT (context);
2909 ti.template_id = fullname;
2910 ti.enum_p = tag_type == enum_type;
2911 ti.class_p = (tag_type == class_type
2912 || tag_type == record_type
2913 || tag_type == union_type);
2914 hash = (htab_hash_pointer (ti.scope)
2915 ^ htab_hash_pointer (ti.name));
2917 /* See if we already have this type. */
2918 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2923 /* Build the TYPENAME_TYPE. */
2924 t = cxx_make_type (TYPENAME_TYPE);
2925 TYPE_CONTEXT (t) = ti.scope;
2926 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2927 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2928 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2930 /* Build the corresponding TYPE_DECL. */
2931 d = build_decl (input_location, TYPE_DECL, name, t);
2932 TYPE_NAME (TREE_TYPE (d)) = d;
2933 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2934 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2935 DECL_ARTIFICIAL (d) = 1;
2937 /* Store it in the hash table. */
2940 /* TYPENAME_TYPEs must always be compared structurally, because
2941 they may or may not resolve down to another type depending on
2942 the currently open classes. */
2943 SET_TYPE_STRUCTURAL_EQUALITY (t);
2949 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2950 provided to name the type. Returns an appropriate type, unless an
2951 error occurs, in which case error_mark_node is returned. If we
2952 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2953 return that, rather than the _TYPE it corresponds to, in other
2954 cases we look through the type decl. If TF_ERROR is set, complain
2955 about errors, otherwise be quiet. */
2958 make_typename_type (tree context, tree name, enum tag_types tag_type,
2959 tsubst_flags_t complain)
2965 if (name == error_mark_node
2966 || context == NULL_TREE
2967 || context == error_mark_node)
2968 return error_mark_node;
2972 if (!(TYPE_LANG_SPECIFIC (name)
2973 && (CLASSTYPE_IS_TEMPLATE (name)
2974 || CLASSTYPE_USE_TEMPLATE (name))))
2975 name = TYPE_IDENTIFIER (name);
2977 /* Create a TEMPLATE_ID_EXPR for the type. */
2978 name = build_nt (TEMPLATE_ID_EXPR,
2979 CLASSTYPE_TI_TEMPLATE (name),
2980 CLASSTYPE_TI_ARGS (name));
2982 else if (TREE_CODE (name) == TYPE_DECL)
2983 name = DECL_NAME (name);
2987 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2989 name = TREE_OPERAND (name, 0);
2990 if (TREE_CODE (name) == TEMPLATE_DECL)
2991 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2992 else if (TREE_CODE (name) == OVERLOAD)
2994 error ("%qD is not a type", name);
2995 return error_mark_node;
2998 if (TREE_CODE (name) == TEMPLATE_DECL)
3000 error ("%qD used without template parameters", name);
3001 return error_mark_node;
3003 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3004 gcc_assert (TYPE_P (context));
3006 if (!MAYBE_CLASS_TYPE_P (context))
3008 if (complain & tf_error)
3009 error ("%q#T is not a class", context);
3010 return error_mark_node;
3013 /* When the CONTEXT is a dependent type, NAME could refer to a
3014 dependent base class of CONTEXT. But look inside it anyway
3015 if CONTEXT is a currently open scope, in case it refers to a
3016 member of the current instantiation or a non-dependent base;
3017 lookup will stop when we hit a dependent base. */
3018 if (!dependent_scope_p (context))
3019 /* We should only set WANT_TYPE when we're a nested typename type.
3020 Then we can give better diagnostics if we find a non-type. */
3021 t = lookup_field (context, name, 0, /*want_type=*/true);
3025 if (!t && dependent_type_p (context))
3026 return build_typename_type (context, name, fullname, tag_type);
3028 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3032 if (complain & tf_error)
3033 error (want_template ? "no class template named %q#T in %q#T"
3034 : "no type named %q#T in %q#T", name, context);
3035 return error_mark_node;
3038 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3040 if (complain & tf_error)
3041 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3043 return error_mark_node;
3045 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3047 if (complain & tf_error)
3048 error ("%<typename %T::%D%> names %q#T, which is not a type",
3050 return error_mark_node;
3053 if (complain & tf_error)
3054 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3057 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3059 /*entering_scope=*/0,
3060 tf_warning_or_error | tf_user);
3062 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3068 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3069 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3070 in which case error_mark_node is returned.
3072 If PARM_LIST is non-NULL, also make sure that the template parameter
3073 list of TEMPLATE_DECL matches.
3075 If COMPLAIN zero, don't complain about any errors that occur. */
3078 make_unbound_class_template (tree context, tree name, tree parm_list,
3079 tsubst_flags_t complain)
3085 name = TYPE_IDENTIFIER (name);
3086 else if (DECL_P (name))
3087 name = DECL_NAME (name);
3088 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3090 if (!dependent_type_p (context)
3091 || currently_open_class (context))
3093 tree tmpl = NULL_TREE;
3095 if (MAYBE_CLASS_TYPE_P (context))
3096 tmpl = lookup_field (context, name, 0, false);
3098 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3100 if (complain & tf_error)
3101 error ("no class template named %q#T in %q#T", name, context);
3102 return error_mark_node;
3106 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3108 if (complain & tf_error)
3110 error ("template parameters do not match template");
3111 error ("%q+D declared here", tmpl);
3113 return error_mark_node;
3116 if (complain & tf_error)
3117 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3122 /* Build the UNBOUND_CLASS_TEMPLATE. */
3123 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3124 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3125 TREE_TYPE (t) = NULL_TREE;
3126 SET_TYPE_STRUCTURAL_EQUALITY (t);
3128 /* Build the corresponding TEMPLATE_DECL. */
3129 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3130 TYPE_NAME (TREE_TYPE (d)) = d;
3131 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3132 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3133 DECL_ARTIFICIAL (d) = 1;
3134 DECL_TEMPLATE_PARMS (d) = parm_list;
3141 /* Push the declarations of builtin types into the namespace.
3142 RID_INDEX is the index of the builtin type in the array
3143 RID_POINTERS. NAME is the name used when looking up the builtin
3144 type. TYPE is the _TYPE node for the builtin type. */
3147 record_builtin_type (enum rid rid_index,
3151 tree rname = NULL_TREE, tname = NULL_TREE;
3152 tree tdecl = NULL_TREE;
3154 if ((int) rid_index < (int) RID_MAX)
3155 rname = ridpointers[(int) rid_index];
3157 tname = get_identifier (name);
3159 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3160 eliminated. Built-in types should not be looked up name; their
3161 names are keywords that the parser can recognize. However, there
3162 is code in c-common.c that uses identifier_global_value to look
3163 up built-in types by name. */
3166 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3167 DECL_ARTIFICIAL (tdecl) = 1;
3168 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3174 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3175 DECL_ARTIFICIAL (tdecl) = 1;
3177 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3180 if (!TYPE_NAME (type))
3181 TYPE_NAME (type) = tdecl;
3184 debug_hooks->type_decl (tdecl, 0);
3187 /* Record one of the standard Java types.
3188 * Declare it as having the given NAME.
3189 * If SIZE > 0, it is the size of one of the integral types;
3190 * otherwise it is the negative of the size of one of the other types. */
3193 record_builtin_java_type (const char* name, int size)
3197 type = build_nonstandard_integer_type (size, 0);
3198 else if (size > -32)
3201 /* "__java_char" or ""__java_boolean". */
3202 type = build_nonstandard_integer_type (-size, 1);
3203 /* Get the signed type cached and attached to the unsigned type,
3204 so it doesn't get garbage-collected at "random" times,
3205 causing potential codegen differences out of different UIDs
3206 and different alias set numbers. */
3207 stype = build_nonstandard_integer_type (-size, 0);
3208 TREE_CHAIN (type) = stype;
3209 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3212 { /* "__java_float" or ""__java_double". */
3213 type = make_node (REAL_TYPE);
3214 TYPE_PRECISION (type) = - size;
3217 record_builtin_type (RID_MAX, name, type);
3218 decl = TYPE_NAME (type);
3220 /* Suppress generate debug symbol entries for these types,
3221 since for normal C++ they are just clutter.
3222 However, push_lang_context undoes this if extern "Java" is seen. */
3223 DECL_IGNORED_P (decl) = 1;
3225 TYPE_FOR_JAVA (type) = 1;
3229 /* Push a type into the namespace so that the back ends ignore it. */
3232 record_unknown_type (tree type, const char* name)
3234 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3235 TYPE_DECL, get_identifier (name), type));
3236 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3237 DECL_IGNORED_P (decl) = 1;
3238 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3239 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3240 TYPE_ALIGN (type) = 1;
3241 TYPE_USER_ALIGN (type) = 0;
3242 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3245 /* A string for which we should create an IDENTIFIER_NODE at
3248 typedef struct predefined_identifier
3250 /* The name of the identifier. */
3251 const char *const name;
3252 /* The place where the IDENTIFIER_NODE should be stored. */
3254 /* Nonzero if this is the name of a constructor or destructor. */
3255 const int ctor_or_dtor_p;
3256 } predefined_identifier;
3258 /* Create all the predefined identifiers. */
3261 initialize_predefined_identifiers (void)
3263 const predefined_identifier *pid;
3265 /* A table of identifiers to create at startup. */
3266 static const predefined_identifier predefined_identifiers[] = {
3267 { "C++", &lang_name_cplusplus, 0 },
3268 { "C", &lang_name_c, 0 },
3269 { "Java", &lang_name_java, 0 },
3270 /* Some of these names have a trailing space so that it is
3271 impossible for them to conflict with names written by users. */
3272 { "__ct ", &ctor_identifier, 1 },
3273 { "__base_ctor ", &base_ctor_identifier, 1 },
3274 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3275 { "__dt ", &dtor_identifier, 1 },
3276 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3277 { "__base_dtor ", &base_dtor_identifier, 1 },
3278 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3279 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3280 { "nelts", &nelts_identifier, 0 },
3281 { THIS_NAME, &this_identifier, 0 },
3282 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3283 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3284 { "_vptr", &vptr_identifier, 0 },
3285 { "__vtt_parm", &vtt_parm_identifier, 0 },
3286 { "::", &global_scope_name, 0 },
3287 { "std", &std_identifier, 0 },
3291 for (pid = predefined_identifiers; pid->name; ++pid)
3293 *pid->node = get_identifier (pid->name);
3294 if (pid->ctor_or_dtor_p)
3295 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3299 /* Create the predefined scalar types of C,
3300 and some nodes representing standard constants (0, 1, (void *)0).
3301 Initialize the global binding level.
3302 Make definitions for built-in primitive functions. */
3305 cxx_init_decl_processing (void)
3308 tree void_ftype_ptr;
3310 build_common_tree_nodes (flag_signed_char, false);
3312 /* Create all the identifiers we need. */
3313 initialize_predefined_identifiers ();
3315 /* Create the global variables. */
3316 push_to_top_level ();
3318 current_function_decl = NULL_TREE;
3319 current_binding_level = NULL;
3320 /* Enter the global namespace. */
3321 gcc_assert (global_namespace == NULL_TREE);
3322 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3324 TREE_PUBLIC (global_namespace) = 1;
3325 begin_scope (sk_namespace, global_namespace);
3327 current_lang_name = NULL_TREE;
3329 if (flag_visibility_ms_compat)
3330 default_visibility = VISIBILITY_HIDDEN;
3333 current_lang_name = lang_name_c;
3335 /* Create the `std' namespace. */
3336 push_namespace (std_identifier);
3337 std_node = current_namespace;
3340 c_common_nodes_and_builtins ();
3342 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3343 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3344 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3345 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3346 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3347 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3348 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3349 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3351 integer_two_node = build_int_cst (NULL_TREE, 2);
3352 integer_three_node = build_int_cst (NULL_TREE, 3);
3354 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3355 truthvalue_type_node = boolean_type_node;
3356 truthvalue_false_node = boolean_false_node;
3357 truthvalue_true_node = boolean_true_node;
3359 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3362 record_builtin_type (RID_MAX, NULL, string_type_node);
3365 delta_type_node = ptrdiff_type_node;
3366 vtable_index_type = ptrdiff_type_node;
3368 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3369 void_ftype = build_function_type (void_type_node, void_list_node);
3370 void_ftype_ptr = build_function_type (void_type_node,
3371 tree_cons (NULL_TREE,
3375 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3377 /* C++ extensions */
3379 unknown_type_node = make_node (UNKNOWN_TYPE);
3380 record_unknown_type (unknown_type_node, "unknown type");
3382 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3383 TREE_TYPE (unknown_type_node) = unknown_type_node;
3385 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3387 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3388 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3390 init_list_type_node = make_node (UNKNOWN_TYPE);
3391 record_unknown_type (init_list_type_node, "init list");
3394 /* Make sure we get a unique function type, so we can give
3395 its pointer type a name. (This wins for gdb.) */
3396 tree vfunc_type = make_node (FUNCTION_TYPE);
3397 TREE_TYPE (vfunc_type) = integer_type_node;
3398 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3399 layout_type (vfunc_type);
3401 vtable_entry_type = build_pointer_type (vfunc_type);
3403 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3406 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3407 layout_type (vtbl_type_node);
3408 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3409 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3410 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3411 layout_type (vtbl_ptr_type_node);
3412 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3414 push_namespace (get_identifier ("__cxxabiv1"));
3415 abi_node = current_namespace;
3418 global_type_node = make_node (LANG_TYPE);
3419 record_unknown_type (global_type_node, "global type");
3422 current_lang_name = lang_name_cplusplus;
3426 tree bad_alloc_type_node;
3427 tree bad_alloc_decl;
3428 tree newtype, deltype;
3429 tree ptr_ftype_sizetype;
3431 push_namespace (std_identifier);
3432 bad_alloc_id = get_identifier ("bad_alloc");
3433 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3434 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3436 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3437 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3438 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3442 = build_function_type (ptr_type_node,
3443 tree_cons (NULL_TREE,
3446 newtype = build_exception_variant
3447 (ptr_ftype_sizetype, add_exception_specifier
3448 (NULL_TREE, bad_alloc_type_node, -1));
3449 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3450 push_cp_library_fn (NEW_EXPR, newtype);
3451 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3452 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3453 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3457 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3459 /* Perform other language dependent initializations. */
3460 init_class_processing ();
3461 init_rtti_processing ();
3463 if (flag_exceptions)
3464 init_exception_processing ();
3466 if (! supports_one_only ())
3469 make_fname_decl = cp_make_fname_decl;
3470 start_fname_decls ();
3472 /* Show we use EH for cleanups. */
3473 if (flag_exceptions)
3474 using_eh_for_cleanups ();
3477 /* Generate an initializer for a function naming variable from
3478 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3479 filled in with the type of the init. */
3482 cp_fname_init (const char* name, tree *type_p)
3484 tree domain = NULL_TREE;
3486 tree init = NULL_TREE;
3491 length = strlen (name);
3492 domain = build_index_type (size_int (length));
3493 init = build_string (length + 1, name);
3496 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3497 type = build_cplus_array_type (type, domain);
3502 TREE_TYPE (init) = type;
3504 init = error_mark_node;
3509 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3510 the decl, LOC is the location to give the decl, NAME is the
3511 initialization string and TYPE_DEP indicates whether NAME depended
3512 on the type of the function. We make use of that to detect
3513 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3514 at the point of first use, so we mustn't push the decl now. */
3517 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3519 const char *const name = (type_dep && processing_template_decl
3520 ? NULL : fname_as_string (type_dep));
3522 tree init = cp_fname_init (name, &type);
3523 tree decl = build_decl (loc, VAR_DECL, id, type);
3526 free (CONST_CAST (char *, name));
3528 /* As we're using pushdecl_with_scope, we must set the context. */
3529 DECL_CONTEXT (decl) = current_function_decl;
3530 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3532 TREE_STATIC (decl) = 1;
3533 TREE_READONLY (decl) = 1;
3534 DECL_ARTIFICIAL (decl) = 1;
3536 TREE_USED (decl) = 1;
3538 if (current_function_decl)
3540 struct cp_binding_level *b = current_binding_level;
3541 while (b->level_chain->kind != sk_function_parms)
3543 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3544 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3545 LOOKUP_ONLYCONVERTING);
3548 pushdecl_top_level_and_finish (decl, init);
3554 builtin_function_1 (tree decl, tree context, bool is_global)
3556 tree id = DECL_NAME (decl);
3557 const char *name = IDENTIFIER_POINTER (id);
3559 retrofit_lang_decl (decl);
3561 /* All nesting of C++ functions is lexical; there is never a "static
3562 chain" in the sense of GNU C nested functions. */
3563 DECL_NO_STATIC_CHAIN (decl) = 1;
3565 DECL_ARTIFICIAL (decl) = 1;
3566 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3567 SET_DECL_LANGUAGE (decl, lang_c);
3568 /* Runtime library routines are, by definition, available in an
3569 external shared object. */
3570 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3571 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3573 DECL_CONTEXT (decl) = context;
3576 pushdecl_top_level (decl);
3580 /* A function in the user's namespace should have an explicit
3581 declaration before it is used. Mark the built-in function as
3582 anticipated but not actually declared. */
3583 if (name[0] != '_' || name[1] != '_')
3584 DECL_ANTICIPATED (decl) = 1;
3585 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3587 size_t len = strlen (name);
3589 /* Treat __*_chk fortification functions as anticipated as well,
3590 unless they are __builtin_*. */
3591 if (len > strlen ("___chk")
3592 && memcmp (name + len - strlen ("_chk"),
3593 "_chk", strlen ("_chk") + 1) == 0)
3594 DECL_ANTICIPATED (decl) = 1;
3601 cxx_builtin_function (tree decl)
3603 tree id = DECL_NAME (decl);
3604 const char *name = IDENTIFIER_POINTER (id);
3605 /* All builtins that don't begin with an '_' should additionally
3606 go in the 'std' namespace. */
3609 tree decl2 = copy_node(decl);
3610 push_namespace (std_identifier);
3611 builtin_function_1 (decl2, std_node, false);
3615 return builtin_function_1 (decl, NULL_TREE, false);
3618 /* Like cxx_builtin_function, but guarantee the function is added to the global
3619 scope. This is to allow function specific options to add new machine
3620 dependent builtins when the target ISA changes via attribute((target(...)))
3621 which saves space on program startup if the program does not use non-generic
3625 cxx_builtin_function_ext_scope (tree decl)
3628 tree id = DECL_NAME (decl);
3629 const char *name = IDENTIFIER_POINTER (id);
3630 /* All builtins that don't begin with an '_' should additionally
3631 go in the 'std' namespace. */
3634 tree decl2 = copy_node(decl);
3635 push_namespace (std_identifier);
3636 builtin_function_1 (decl2, std_node, true);
3640 return builtin_function_1 (decl, NULL_TREE, true);
3643 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3644 function. Not called directly. */
3647 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3649 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3650 DECL_EXTERNAL (fn) = 1;
3651 TREE_PUBLIC (fn) = 1;
3652 DECL_ARTIFICIAL (fn) = 1;
3653 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3654 SET_DECL_LANGUAGE (fn, lang_c);
3655 /* Runtime library routines are, by definition, available in an
3656 external shared object. */
3657 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3658 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3662 /* Returns the _DECL for a library function with C linkage.
3663 We assume that such functions never throw; if this is incorrect,
3664 callers should unset TREE_NOTHROW. */
3667 build_library_fn (tree name, tree type)
3669 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3670 TREE_NOTHROW (fn) = 1;
3674 /* Returns the _DECL for a library function with C++ linkage. */
3677 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3679 tree fn = build_library_fn_1 (name, operator_code, type);
3680 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3681 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3682 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3686 /* Like build_library_fn, but takes a C string instead of an
3690 build_library_fn_ptr (const char* name, tree type)
3692 return build_library_fn (get_identifier (name), type);
3695 /* Like build_cp_library_fn, but takes a C string instead of an
3699 build_cp_library_fn_ptr (const char* name, tree type)
3701 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3704 /* Like build_library_fn, but also pushes the function so that we will
3705 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3706 may throw exceptions listed in RAISES. */
3709 push_library_fn (tree name, tree type, tree raises)
3714 type = build_exception_variant (type, raises);
3716 fn = build_library_fn (name, type);
3717 pushdecl_top_level (fn);
3721 /* Like build_cp_library_fn, but also pushes the function so that it
3722 will be found by normal lookup. */
3725 push_cp_library_fn (enum tree_code operator_code, tree type)
3727 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3734 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3738 push_void_library_fn (tree name, tree parmtypes)
3740 tree type = build_function_type (void_type_node, parmtypes);
3741 return push_library_fn (name, type, NULL_TREE);
3744 /* Like push_library_fn, but also note that this function throws
3745 and does not return. Used for __throw_foo and the like. */
3748 push_throw_library_fn (tree name, tree type)
3750 tree fn = push_library_fn (name, type, NULL_TREE);
3751 TREE_THIS_VOLATILE (fn) = 1;
3752 TREE_NOTHROW (fn) = 0;
3756 /* When we call finish_struct for an anonymous union, we create
3757 default copy constructors and such. But, an anonymous union
3758 shouldn't have such things; this function undoes the damage to the
3759 anonymous union type T.
3761 (The reason that we create the synthesized methods is that we don't
3762 distinguish `union { int i; }' from `typedef union { int i; } U'.
3763 The first is an anonymous union; the second is just an ordinary
3767 fixup_anonymous_aggr (tree t)
3771 /* Wipe out memory of synthesized methods. */
3772 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3773 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3774 TYPE_HAS_INIT_REF (t) = 0;
3775 TYPE_HAS_CONST_INIT_REF (t) = 0;
3776 TYPE_HAS_ASSIGN_REF (t) = 0;
3777 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3779 /* Splice the implicitly generated functions out of the TYPE_METHODS
3781 q = &TYPE_METHODS (t);
3784 if (DECL_ARTIFICIAL (*q))
3785 *q = TREE_CHAIN (*q);
3787 q = &TREE_CHAIN (*q);
3790 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3791 if (TYPE_METHODS (t))
3793 tree decl = TYPE_MAIN_DECL (t);
3795 if (TREE_CODE (t) != UNION_TYPE)
3796 error ("%Jan anonymous struct cannot have function members", decl);
3798 error ("%Jan anonymous union cannot have function members", decl);
3801 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3802 assignment operators (because they cannot have these methods themselves).
3803 For anonymous unions this is already checked because they are not allowed
3804 in any union, otherwise we have to check it. */
3805 if (TREE_CODE (t) != UNION_TYPE)
3809 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3810 if (TREE_CODE (field) == FIELD_DECL)
3812 type = TREE_TYPE (field);
3813 if (CLASS_TYPE_P (type))
3815 if (TYPE_NEEDS_CONSTRUCTING (type))
3816 error ("member %q+#D with constructor not allowed "
3817 "in anonymous aggregate", field);
3818 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3819 error ("member %q+#D with destructor not allowed "
3820 "in anonymous aggregate", field);
3821 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3822 error ("member %q+#D with copy assignment operator "
3823 "not allowed in anonymous aggregate", field);
3829 /* Make sure that a declaration with no declarator is well-formed, i.e.
3830 just declares a tagged type or anonymous union.
3832 Returns the type declared; or NULL_TREE if none. */
3835 check_tag_decl (cp_decl_specifier_seq *declspecs)
3837 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3838 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3839 /* If a class, struct, or enum type is declared by the DECLSPECS
3840 (i.e, if a class-specifier, enum-specifier, or non-typename
3841 elaborated-type-specifier appears in the DECLSPECS),
3842 DECLARED_TYPE is set to the corresponding type. */
3843 tree declared_type = NULL_TREE;
3844 bool error_p = false;
3846 if (declspecs->multiple_types_p)
3847 error ("multiple types in one declaration");
3848 else if (declspecs->redefined_builtin_type)
3850 if (!in_system_header)
3851 permerror (input_location, "redeclaration of C++ built-in type %qT",
3852 declspecs->redefined_builtin_type);
3857 && TYPE_P (declspecs->type)
3858 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3859 && MAYBE_CLASS_TYPE_P (declspecs->type))
3860 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3861 declared_type = declspecs->type;
3862 else if (declspecs->type == error_mark_node)
3864 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3865 permerror (input_location, "declaration does not declare anything");
3866 /* Check for an anonymous union. */
3867 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3868 && TYPE_ANONYMOUS_P (declared_type))
3870 /* 7/3 In a simple-declaration, the optional init-declarator-list
3871 can be omitted only when declaring a class (clause 9) or
3872 enumeration (7.2), that is, when the decl-specifier-seq contains
3873 either a class-specifier, an elaborated-type-specifier with
3874 a class-key (9.1), or an enum-specifier. In these cases and
3875 whenever a class-specifier or enum-specifier is present in the
3876 decl-specifier-seq, the identifiers in these specifiers are among
3877 the names being declared by the declaration (as class-name,
3878 enum-names, or enumerators, depending on the syntax). In such
3879 cases, and except for the declaration of an unnamed bit-field (9.6),
3880 the decl-specifier-seq shall introduce one or more names into the
3881 program, or shall redeclare a name introduced by a previous
3882 declaration. [Example:
3883 enum { }; // ill-formed
3884 typedef class { }; // ill-formed
3888 error ("missing type-name in typedef-declaration");
3891 /* Anonymous unions are objects, so they can have specifiers. */;
3892 SET_ANON_AGGR_TYPE_P (declared_type);
3894 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3895 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3900 if (declspecs->specs[(int)ds_inline]
3901 || declspecs->specs[(int)ds_virtual])
3902 error ("%qs can only be specified for functions",
3903 declspecs->specs[(int)ds_inline]
3904 ? "inline" : "virtual");
3906 && (!current_class_type
3907 || current_scope () != current_class_type))
3908 error ("%<friend%> can only be specified inside a class");
3909 else if (declspecs->specs[(int)ds_explicit])
3910 error ("%<explicit%> can only be specified for constructors");
3911 else if (declspecs->storage_class)
3912 error ("a storage class can only be specified for objects "
3914 else if (declspecs->specs[(int)ds_const]
3915 || declspecs->specs[(int)ds_volatile]
3916 || declspecs->specs[(int)ds_restrict]
3917 || declspecs->specs[(int)ds_thread])
3918 error ("qualifiers can only be specified for objects "
3920 else if (saw_typedef)
3921 warning (0, "%<typedef%> was ignored in this declaration");
3924 return declared_type;
3927 /* Called when a declaration is seen that contains no names to declare.
3928 If its type is a reference to a structure, union or enum inherited
3929 from a containing scope, shadow that tag name for the current scope
3930 with a forward reference.
3931 If its type defines a new named structure or union
3932 or defines an enum, it is valid but we need not do anything here.
3933 Otherwise, it is an error.
3935 C++: may have to grok the declspecs to learn about static,
3936 complain for anonymous unions.
3938 Returns the TYPE declared -- or NULL_TREE if none. */
3941 shadow_tag (cp_decl_specifier_seq *declspecs)
3943 tree t = check_tag_decl (declspecs);
3948 if (declspecs->attributes)
3950 warning (0, "attribute ignored in declaration of %q+#T", t);
3951 warning (0, "attribute for %q+#T must follow the %qs keyword",
3952 t, class_key_or_enum_as_string (t));
3956 if (maybe_process_partial_specialization (t) == error_mark_node)
3959 /* This is where the variables in an anonymous union are
3960 declared. An anonymous union declaration looks like:
3962 because there is no declarator after the union, the parser
3963 sends that declaration here. */
3964 if (ANON_AGGR_TYPE_P (t))
3966 fixup_anonymous_aggr (t);
3968 if (TYPE_FIELDS (t))
3970 tree decl = grokdeclarator (/*declarator=*/NULL,
3971 declspecs, NORMAL, 0, NULL);
3972 finish_anon_union (decl);
3979 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3982 groktypename (cp_decl_specifier_seq *type_specifiers,
3983 const cp_declarator *declarator,
3984 bool is_template_arg)
3988 enum decl_context context
3989 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3990 attrs = type_specifiers->attributes;
3991 type_specifiers->attributes = NULL_TREE;
3992 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3993 if (attrs && type != error_mark_node)
3995 if (CLASS_TYPE_P (type))
3996 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3997 "outside of definition", type);
3998 else if (MAYBE_CLASS_TYPE_P (type))
3999 /* A template type parameter or other dependent type. */
4000 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4001 "type %qT without an associated declaration", type);
4003 cplus_decl_attributes (&type, attrs, 0);
4008 /* Process a DECLARATOR for a function-scope variable declaration,
4009 namespace-scope variable declaration, or function declaration.
4010 (Function definitions go through start_function; class member
4011 declarations appearing in the body of the class go through
4012 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4013 If an error occurs, the error_mark_node is returned instead.
4015 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4016 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4017 for an explicitly defaulted function, or SD_DELETED for an explicitly
4018 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4019 implicitly initialized via a default constructor. ATTRIBUTES and
4020 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4021 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4022 set, the caller is responsible for calling pop_scope. */
4025 start_decl (const cp_declarator *declarator,
4026 cp_decl_specifier_seq *declspecs,
4029 tree prefix_attributes,
4030 tree *pushed_scope_p)
4038 *pushed_scope_p = NULL_TREE;
4040 /* An object declared as __attribute__((deprecated)) suppresses
4041 warnings of uses of other deprecated items. */
4042 if (lookup_attribute ("deprecated", attributes))
4043 deprecated_state = DEPRECATED_SUPPRESS;
4045 attributes = chainon (attributes, prefix_attributes);
4047 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4050 deprecated_state = DEPRECATED_NORMAL;
4052 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4053 || decl == error_mark_node)
4054 return error_mark_node;
4056 type = TREE_TYPE (decl);
4058 context = DECL_CONTEXT (decl);
4062 *pushed_scope_p = push_scope (context);
4064 /* We are only interested in class contexts, later. */
4065 if (TREE_CODE (context) == NAMESPACE_DECL)
4066 context = NULL_TREE;
4070 /* Is it valid for this decl to have an initializer at all?
4071 If not, set INITIALIZED to zero, which will indirectly
4072 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4073 switch (TREE_CODE (decl))
4076 error ("typedef %qD is initialized (use decltype instead)", decl);
4077 return error_mark_node;
4080 if (initialized == SD_DELETED)
4081 /* We'll handle the rest of the semantics later, but we need to
4082 set this now so it's visible to duplicate_decls. */
4083 DECL_DELETED_FN (decl) = 1;
4092 if (! toplevel_bindings_p ()
4093 && DECL_EXTERNAL (decl))
4094 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4096 DECL_EXTERNAL (decl) = 0;
4097 if (toplevel_bindings_p ())
4098 TREE_STATIC (decl) = 1;
4101 /* If this is a typedef that names the class for linkage purposes
4102 (7.1.3p8), apply any attributes directly to the type. */
4103 if (TREE_CODE (decl) == TYPE_DECL
4104 && TAGGED_TYPE_P (TREE_TYPE (decl))
4105 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4106 flags = ATTR_FLAG_TYPE_IN_PLACE;
4110 /* Set attributes here so if duplicate decl, will have proper attributes. */
4111 cplus_decl_attributes (&decl, attributes, flags);
4113 /* Dllimported symbols cannot be defined. Static data members (which
4114 can be initialized in-class and dllimported) go through grokfield,
4115 not here, so we don't need to exclude those decls when checking for
4117 if (initialized && DECL_DLLIMPORT_P (decl))
4119 error ("definition of %q#D is marked %<dllimport%>", decl);
4120 DECL_DLLIMPORT_P (decl) = 0;
4123 /* If #pragma weak was used, mark the decl weak now. */
4124 maybe_apply_pragma_weak (decl);
4126 if (TREE_CODE (decl) == FUNCTION_DECL
4127 && DECL_DECLARED_INLINE_P (decl)
4128 && DECL_UNINLINABLE (decl)
4129 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4130 warning (0, "inline function %q+D given attribute noinline", decl);
4132 if (context && COMPLETE_TYPE_P (complete_type (context)))
4134 if (TREE_CODE (decl) == VAR_DECL)
4136 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4137 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4138 error ("%q#D is not a static member of %q#T", decl, context);
4141 if (DECL_CONTEXT (field) != context)
4143 if (!same_type_p (DECL_CONTEXT (field), context))
4144 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4145 "to be defined as %<%T::%D%>",
4146 DECL_CONTEXT (field), DECL_NAME (decl),
4147 context, DECL_NAME (decl));
4148 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4150 if (processing_specialization
4151 && template_class_depth (context) == 0
4152 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4153 error ("template header not allowed in member definition "
4154 "of explicitly specialized class");
4155 /* Static data member are tricky; an in-class initialization
4156 still doesn't provide a definition, so the in-class
4157 declaration will have DECL_EXTERNAL set, but will have an
4158 initialization. Thus, duplicate_decls won't warn
4159 about this situation, and so we check here. */
4160 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4161 error ("duplicate initialization of %qD", decl);
4162 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4168 tree field = check_classfn (context, decl,
4169 (processing_template_decl
4170 > template_class_depth (context))
4171 ? current_template_parms
4173 if (field && field != error_mark_node
4174 && duplicate_decls (decl, field,
4175 /*newdecl_is_friend=*/false))
4179 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4180 DECL_IN_AGGR_P (decl) = 0;
4181 /* Do not mark DECL as an explicit specialization if it was not
4182 already marked as an instantiation; a declaration should
4183 never be marked as a specialization unless we know what
4184 template is being specialized. */
4185 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4187 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4189 /* [temp.expl.spec] An explicit specialization of a static data
4190 member of a template is a definition if the declaration
4191 includes an initializer; otherwise, it is a declaration.
4193 We check for processing_specialization so this only applies
4194 to the new specialization syntax. */
4195 if (!initialized && processing_specialization)
4196 DECL_EXTERNAL (decl) = 1;
4199 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4200 permerror (input_location, "declaration of %q#D outside of class is not definition",
4204 was_public = TREE_PUBLIC (decl);
4206 /* Enter this declaration into the symbol table. */
4207 decl = maybe_push_decl (decl);
4209 if (processing_template_decl)
4210 decl = push_template_decl (decl);
4211 if (decl == error_mark_node)
4212 return error_mark_node;
4214 /* Tell the back end to use or not use .common as appropriate. If we say
4215 -fconserve-space, we want this to save .data space, at the expense of
4216 wrong semantics. If we say -fno-conserve-space, we want this to
4217 produce errors about redefs; to do this we force variables into the
4219 if (flag_conserve_space
4220 && TREE_CODE (decl) == VAR_DECL
4221 && TREE_PUBLIC (decl)
4222 && !DECL_THREAD_LOCAL_P (decl)
4223 && !have_global_bss_p ())
4224 DECL_COMMON (decl) = 1;
4226 if (TREE_CODE (decl) == VAR_DECL
4227 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4228 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4230 /* This is a const variable with implicit 'static'. Set
4231 DECL_THIS_STATIC so we can tell it from variables that are
4232 !TREE_PUBLIC because of the anonymous namespace. */
4233 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4234 DECL_THIS_STATIC (decl) = 1;
4237 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4238 start_decl_1 (decl, initialized);
4243 /* Process the declaration of a variable DECL. INITIALIZED is true
4244 iff DECL is explicitly initialized. (INITIALIZED is false if the
4245 variable is initialized via an implicitly-called constructor.)
4246 This function must be called for ordinary variables (including, for
4247 example, implicit instantiations of templates), but must not be
4248 called for template declarations. */
4251 start_decl_1 (tree decl, bool initialized)
4255 bool aggregate_definition_p;
4257 gcc_assert (!processing_template_decl);
4259 if (error_operand_p (decl))
4262 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4264 type = TREE_TYPE (decl);
4265 complete_p = COMPLETE_TYPE_P (type);
4266 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4268 /* If an explicit initializer is present, or if this is a definition
4269 of an aggregate, then we need a complete type at this point.
4270 (Scalars are always complete types, so there is nothing to
4271 check.) This code just sets COMPLETE_P; errors (if necessary)
4272 are issued below. */
4273 if ((initialized || aggregate_definition_p)
4275 && COMPLETE_TYPE_P (complete_type (type)))
4278 /* We will not yet have set TREE_READONLY on DECL if the type
4279 was "const", but incomplete, before this point. But, now, we
4280 have a complete type, so we can try again. */
4281 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4285 /* Is it valid for this decl to have an initializer at all? */
4287 /* Don't allow initializations for incomplete types except for
4288 arrays which might be completed by the initialization. */
4290 ; /* A complete type is ok. */
4291 else if (type_uses_auto (type))
4292 ; /* An auto type is ok. */
4293 else if (TREE_CODE (type) != ARRAY_TYPE)
4295 error ("variable %q#D has initializer but incomplete type", decl);
4296 type = TREE_TYPE (decl) = error_mark_node;
4298 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4300 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4301 error ("elements of array %q#D have incomplete type", decl);
4302 /* else we already gave an error in start_decl. */
4305 else if (aggregate_definition_p && !complete_p)
4307 if (type_uses_auto (type))
4308 error ("declaration of %q#D has no initializer", decl);
4310 error ("aggregate %q#D has incomplete type and cannot be defined",
4312 /* Change the type so that assemble_variable will give
4313 DECL an rtl we can live with: (mem (const_int 0)). */
4314 type = TREE_TYPE (decl) = error_mark_node;
4317 /* Create a new scope to hold this declaration if necessary.
4318 Whether or not a new scope is necessary cannot be determined
4319 until after the type has been completed; if the type is a
4320 specialization of a class template it is not until after
4321 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4322 will be set correctly. */
4323 maybe_push_cleanup_level (type);
4326 /* Handle initialization of references. DECL, TYPE, and INIT have the
4327 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4328 but will be set to a new CLEANUP_STMT if a temporary is created
4329 that must be destroyed subsequently.
4331 Returns an initializer expression to use to initialize DECL, or
4332 NULL if the initialization can be performed statically.
4334 Quotes on semantics can be found in ARM 8.4.3. */
4337 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4341 if (init == NULL_TREE)
4343 if ((DECL_LANG_SPECIFIC (decl) == 0
4344 || DECL_IN_AGGR_P (decl) == 0)
4345 && ! DECL_THIS_EXTERN (decl))
4346 error ("%qD declared as reference but not initialized", decl);
4350 if (TREE_CODE (init) == CONSTRUCTOR)
4352 error ("ISO C++ forbids use of initializer list to "
4353 "initialize reference %qD", decl);
4357 if (TREE_CODE (init) == TREE_LIST)
4358 init = build_x_compound_expr_from_list (init, "initializer");
4360 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4361 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4362 /* Note: default conversion is only called in very special cases. */
4363 init = decay_conversion (init);
4365 /* Convert INIT to the reference type TYPE. This may involve the
4366 creation of a temporary, whose lifetime must be the same as that
4367 of the reference. If so, a DECL_EXPR for the temporary will be
4368 added just after the DECL_EXPR for DECL. That's why we don't set
4369 DECL_INITIAL for local references (instead assigning to them
4370 explicitly); we need to allow the temporary to be initialized
4372 tmp = initialize_reference (type, init, decl, cleanup);
4374 if (tmp == error_mark_node)
4376 else if (tmp == NULL_TREE)
4378 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4382 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4385 DECL_INITIAL (decl) = tmp;
4390 /* Subroutine of check_initializer. We're initializing a DECL of
4391 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4392 extend the lifetime of the underlying array to match that of the decl,
4393 just like for reference initialization. CLEANUP is as for
4394 grok_reference_init. */
4397 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4399 tree aggr_init, array, arrtype;
4400 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4401 aggr_init = TARGET_EXPR_INITIAL (init);
4402 init = build2 (INIT_EXPR, type, decl, init);
4404 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4405 arrtype = TREE_TYPE (array);
4407 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4408 array = TREE_OPERAND (array, 0);
4409 /* If the array is constant, finish_compound_literal already made it a
4410 static variable and we don't need to do anything here. */
4411 if (decl && TREE_CODE (array) == TARGET_EXPR)
4414 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4415 var = build_address (var);
4416 var = convert (arrtype, var);
4417 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4418 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4423 /* Designated initializers in arrays are not supported in GNU C++.
4424 The parser cannot detect this error since it does not know whether
4425 a given brace-enclosed initializer is for a class type or for an
4426 array. This function checks that CE does not use a designated
4427 initializer. If it does, an error is issued. Returns true if CE
4428 is valid, i.e., does not have a designated initializer. */
4431 check_array_designated_initializer (const constructor_elt *ce)
4433 /* Designated initializers for array elements are not supported. */
4436 /* The parser only allows identifiers as designated
4438 if (ce->index == error_mark_node)
4439 error ("name used in a GNU-style designated "
4440 "initializer for an array");
4443 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4444 error ("name %qD used in a GNU-style designated "
4445 "initializer for an array", ce->index);
4453 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4454 array until we finish parsing the initializer. If that's the
4455 situation we're in, update DECL accordingly. */
4458 maybe_deduce_size_from_array_init (tree decl, tree init)
4460 tree type = TREE_TYPE (decl);
4462 if (TREE_CODE (type) == ARRAY_TYPE
4463 && TYPE_DOMAIN (type) == NULL_TREE
4464 && TREE_CODE (decl) != TYPE_DECL)
4466 /* do_default is really a C-ism to deal with tentative definitions.
4467 But let's leave it here to ease the eventual merge. */
4468 int do_default = !DECL_EXTERNAL (decl);
4469 tree initializer = init ? init : DECL_INITIAL (decl);
4472 /* Check that there are no designated initializers in INIT, as
4473 those are not supported in GNU C++, and as the middle-end
4474 will crash if presented with a non-numeric designated
4476 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4478 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4479 constructor_elt *ce;
4482 VEC_iterate (constructor_elt, v, i, ce);
4484 if (!check_array_designated_initializer (ce))
4490 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4494 error ("initializer fails to determine size of %qD", decl);
4495 TREE_TYPE (decl) = error_mark_node;
4497 else if (failure == 2)
4501 error ("array size missing in %qD", decl);
4502 TREE_TYPE (decl) = error_mark_node;
4504 /* If a `static' var's size isn't known, make it extern as
4505 well as static, so it does not get allocated. If it's not
4506 `static', then don't mark it extern; finish_incomplete_decl
4507 will give it a default size and it will get allocated. */
4508 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4509 DECL_EXTERNAL (decl) = 1;
4511 else if (failure == 3)
4513 error ("zero-size array %qD", decl);
4514 TREE_TYPE (decl) = error_mark_node;
4518 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4520 relayout_decl (decl);
4524 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4525 any appropriate error messages regarding the layout. */
4528 layout_var_decl (tree decl)
4532 type = TREE_TYPE (decl);
4533 if (type == error_mark_node)
4536 /* If we haven't already layed out this declaration, do so now.
4537 Note that we must not call complete type for an external object
4538 because it's type might involve templates that we are not
4539 supposed to instantiate yet. (And it's perfectly valid to say
4540 `extern X x' for some incomplete type `X'.) */
4541 if (!DECL_EXTERNAL (decl))
4542 complete_type (type);
4543 if (!DECL_SIZE (decl)
4544 && TREE_TYPE (decl) != error_mark_node
4545 && (COMPLETE_TYPE_P (type)
4546 || (TREE_CODE (type) == ARRAY_TYPE
4547 && !TYPE_DOMAIN (type)
4548 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4549 layout_decl (decl, 0);
4551 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4553 /* An automatic variable with an incomplete type: that is an error.
4554 Don't talk about array types here, since we took care of that
4555 message in grokdeclarator. */
4556 error ("storage size of %qD isn't known", decl);
4557 TREE_TYPE (decl) = error_mark_node;
4560 /* Keep this code around in case we later want to control debug info
4561 based on whether a type is "used". (jason 1999-11-11) */
4563 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4564 /* Let debugger know it should output info for this type. */
4565 note_debug_info_needed (ttype);
4567 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4568 note_debug_info_needed (DECL_CONTEXT (decl));
4571 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4572 && DECL_SIZE (decl) != NULL_TREE
4573 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4575 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4576 constant_expression_warning (DECL_SIZE (decl));
4579 error ("storage size of %qD isn't constant", decl);
4580 TREE_TYPE (decl) = error_mark_node;
4585 /* If a local static variable is declared in an inline function, or if
4586 we have a weak definition, we must endeavor to create only one
4587 instance of the variable at link-time. */
4590 maybe_commonize_var (tree decl)
4592 /* Static data in a function with comdat linkage also has comdat
4594 if (TREE_STATIC (decl)
4595 /* Don't mess with __FUNCTION__. */
4596 && ! DECL_ARTIFICIAL (decl)
4597 && DECL_FUNCTION_SCOPE_P (decl)
4598 /* Unfortunately, import_export_decl has not always been called
4599 before the function is processed, so we cannot simply check
4601 && (DECL_COMDAT (DECL_CONTEXT (decl))
4602 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4603 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4604 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4608 /* With weak symbols, we simply make the variable COMDAT;
4609 that will cause copies in multiple translations units to
4611 comdat_linkage (decl);
4615 if (DECL_INITIAL (decl) == NULL_TREE
4616 || DECL_INITIAL (decl) == error_mark_node)
4618 /* Without weak symbols, we can use COMMON to merge
4619 uninitialized variables. */
4620 TREE_PUBLIC (decl) = 1;
4621 DECL_COMMON (decl) = 1;
4625 /* While for initialized variables, we must use internal
4626 linkage -- which means that multiple copies will not
4628 TREE_PUBLIC (decl) = 0;
4629 DECL_COMMON (decl) = 0;
4630 warning (0, "sorry: semantics of inline function static "
4631 "data %q+#D are wrong (you'll wind up "
4632 "with multiple copies)", decl);
4633 warning (0, "%J you can work around this by removing "
4639 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4640 /* Set it up again; we might have set DECL_INITIAL since the last
4642 comdat_linkage (decl);
4645 /* Issue an error message if DECL is an uninitialized const variable. */
4648 check_for_uninitialized_const_var (tree decl)
4650 tree type = TREE_TYPE (decl);
4652 /* ``Unless explicitly declared extern, a const object does not have
4653 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4655 if (TREE_CODE (decl) == VAR_DECL
4656 && TREE_CODE (type) != REFERENCE_TYPE
4657 && CP_TYPE_CONST_P (type)
4658 && !TYPE_NEEDS_CONSTRUCTING (type)
4659 && !DECL_INITIAL (decl))
4660 error ("uninitialized const %qD", decl);
4664 /* Structure holding the current initializer being processed by reshape_init.
4665 CUR is a pointer to the current element being processed, END is a pointer
4666 after the last element present in the initializer. */
4667 typedef struct reshape_iterator_t
4669 constructor_elt *cur;
4670 constructor_elt *end;
4673 static tree reshape_init_r (tree, reshape_iter *, bool);
4675 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4676 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4677 initialized. If there are no more such fields, the return value
4681 next_initializable_field (tree field)
4684 && (TREE_CODE (field) != FIELD_DECL
4685 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4686 || DECL_ARTIFICIAL (field)))
4687 field = TREE_CHAIN (field);
4692 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4693 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4694 INTEGER_CST representing the size of the array minus one (the maximum index),
4695 or NULL_TREE if the array was declared without specifying the size. D is
4696 the iterator within the constructor. */
4699 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4702 bool sized_array_p = (max_index != NULL_TREE);
4703 unsigned HOST_WIDE_INT max_index_cst = 0;
4704 unsigned HOST_WIDE_INT index;
4706 /* The initializer for an array is always a CONSTRUCTOR. */
4707 new_init = build_constructor (init_list_type_node, NULL);
4711 /* Minus 1 is used for zero sized arrays. */
4712 if (integer_all_onesp (max_index))
4715 if (host_integerp (max_index, 1))
4716 max_index_cst = tree_low_cst (max_index, 1);
4717 /* sizetype is sign extended, not zero extended. */
4719 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4723 /* Loop until there are no more initializers. */
4725 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4730 check_array_designated_initializer (d->cur);
4731 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4732 if (elt_init == error_mark_node)
4733 return error_mark_node;
4734 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4740 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4741 Parameters are the same of reshape_init_r. */
4744 reshape_init_array (tree type, reshape_iter *d)
4746 tree max_index = NULL_TREE;
4748 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4750 if (TYPE_DOMAIN (type))
4751 max_index = array_type_nelts (type);
4753 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4756 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4757 Parameters are the same of reshape_init_r. */
4760 reshape_init_vector (tree type, reshape_iter *d)
4762 tree max_index = NULL_TREE;
4765 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4767 if (COMPOUND_LITERAL_P (d->cur->value))
4769 tree value = d->cur->value;
4770 if (!same_type_p (TREE_TYPE (value), type))
4772 error ("invalid type %qT as initializer for a vector of type %qT",
4773 TREE_TYPE (d->cur->value), type);
4774 value = error_mark_node;
4780 /* For a vector, the representation type is a struct
4781 containing a single member which is an array of the
4782 appropriate size. */
4783 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4784 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4785 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4787 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4790 /* Subroutine of reshape_init_r, processes the initializers for classes
4791 or union. Parameters are the same of reshape_init_r. */
4794 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4799 gcc_assert (CLASS_TYPE_P (type));
4801 /* The initializer for a class is always a CONSTRUCTOR. */
4802 new_init = build_constructor (init_list_type_node, NULL);
4803 field = next_initializable_field (TYPE_FIELDS (type));
4809 An initializer for an aggregate member that is an
4810 empty class shall have the form of an empty
4811 initializer-list {}. */
4812 if (!first_initializer_p)
4814 error ("initializer for %qT must be brace-enclosed", type);
4815 return error_mark_node;
4820 /* Loop through the initializable fields, gathering initializers. */
4821 while (d->cur != d->end)
4825 /* Handle designated initializers, as an extension. */
4828 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4830 if (!field || TREE_CODE (field) != FIELD_DECL)
4832 error ("%qT has no non-static data member named %qD", type,
4834 return error_mark_node;
4838 /* If we processed all the member of the class, we are done. */
4842 field_init = reshape_init_r (TREE_TYPE (field), d,
4843 /*first_initializer_p=*/false);
4844 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4848 When a union is initialized with a brace-enclosed
4849 initializer, the braces shall only contain an
4850 initializer for the first member of the union. */
4851 if (TREE_CODE (type) == UNION_TYPE)
4854 field = next_initializable_field (TREE_CHAIN (field));
4860 /* Subroutine of reshape_init, which processes a single initializer (part of
4861 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4862 iterator within the CONSTRUCTOR which points to the initializer to process.
4863 FIRST_INITIALIZER_P is true if this is the first initializer of the
4864 CONSTRUCTOR node. */
4867 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4869 tree init = d->cur->value;
4871 if (error_operand_p (init))
4872 return error_mark_node;
4874 /* A non-aggregate type is always initialized with a single
4876 if (!CP_AGGREGATE_TYPE_P (type))
4878 /* It is invalid to initialize a non-aggregate type with a
4879 brace-enclosed initializer before C++0x.
4880 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4881 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4882 a CONSTRUCTOR (with a record type). */
4883 if (TREE_CODE (init) == CONSTRUCTOR
4884 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4886 if (SCALAR_TYPE_P (type))
4888 error ("braces around scalar initializer for type %qT", type);
4889 init = error_mark_node;
4892 maybe_warn_cpp0x ("extended initializer lists");
4901 All implicit type conversions (clause _conv_) are considered when
4902 initializing the aggregate member with an initializer from an
4903 initializer-list. If the initializer can initialize a member,
4904 the member is initialized. Otherwise, if the member is itself a
4905 non-empty subaggregate, brace elision is assumed and the
4906 initializer is considered for the initialization of the first
4907 member of the subaggregate. */
4908 if (TREE_CODE (init) != CONSTRUCTOR
4909 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4915 /* [dcl.init.string]
4917 A char array (whether plain char, signed char, or unsigned char)
4918 can be initialized by a string-literal (optionally enclosed in
4919 braces); a wchar_t array can be initialized by a wide
4920 string-literal (optionally enclosed in braces). */
4921 if (TREE_CODE (type) == ARRAY_TYPE
4922 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4924 tree str_init = init;
4926 /* Strip one level of braces if and only if they enclose a single
4927 element (as allowed by [dcl.init.string]). */
4928 if (!first_initializer_p
4929 && TREE_CODE (str_init) == CONSTRUCTOR
4930 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4932 str_init = VEC_index (constructor_elt,
4933 CONSTRUCTOR_ELTS (str_init), 0)->value;
4936 /* If it's a string literal, then it's the initializer for the array
4937 as a whole. Otherwise, continue with normal initialization for
4938 array types (one value per array element). */
4939 if (TREE_CODE (str_init) == STRING_CST)
4946 /* The following cases are about aggregates. If we are not within a full
4947 initializer already, and there is not a CONSTRUCTOR, it means that there
4948 is a missing set of braces (that is, we are processing the case for
4949 which reshape_init exists). */
4950 if (!first_initializer_p)
4952 if (TREE_CODE (init) == CONSTRUCTOR)
4954 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4955 /* There is no need to reshape pointer-to-member function
4956 initializers, as they are always constructed correctly
4957 by the front end. */
4959 else if (COMPOUND_LITERAL_P (init))
4960 /* For a nested compound literal, there is no need to reshape since
4961 brace elision is not allowed. Even if we decided to allow it,
4962 we should add a call to reshape_init in finish_compound_literal,
4963 before calling digest_init, so changing this code would still
4964 not be necessary. */
4965 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4969 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4970 return reshape_init (type, init);
4974 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4978 /* Dispatch to specialized routines. */
4979 if (CLASS_TYPE_P (type))
4980 return reshape_init_class (type, d, first_initializer_p);
4981 else if (TREE_CODE (type) == ARRAY_TYPE)
4982 return reshape_init_array (type, d);
4983 else if (TREE_CODE (type) == VECTOR_TYPE)
4984 return reshape_init_vector (type, d);
4989 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4990 brace-enclosed aggregate initializer.
4992 INIT is the CONSTRUCTOR containing the list of initializers describing
4993 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4994 It may not presently match the shape of the TYPE; for example:
4996 struct S { int a; int b; };
4997 struct S a[] = { 1, 2, 3, 4 };
4999 Here INIT will hold a VEC of four elements, rather than a
5000 VEC of two elements, each itself a VEC of two elements. This
5001 routine transforms INIT from the former form into the latter. The
5002 revised CONSTRUCTOR node is returned. */
5005 reshape_init (tree type, tree init)
5007 VEC(constructor_elt, gc) *v;
5011 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5013 v = CONSTRUCTOR_ELTS (init);
5015 /* An empty constructor does not need reshaping, and it is always a valid
5017 if (VEC_empty (constructor_elt, v))
5020 /* Recurse on this CONSTRUCTOR. */
5021 d.cur = VEC_index (constructor_elt, v, 0);
5022 d.end = d.cur + VEC_length (constructor_elt, v);
5024 new_init = reshape_init_r (type, &d, true);
5025 if (new_init == error_mark_node)
5026 return error_mark_node;
5028 /* Make sure all the element of the constructor were used. Otherwise,
5029 issue an error about exceeding initializers. */
5031 error ("too many initializers for %qT", type);
5036 /* Verify array initializer. Returns true if errors have been reported. */
5039 check_array_initializer (tree decl, tree type, tree init)
5041 tree element_type = TREE_TYPE (type);
5043 /* The array type itself need not be complete, because the
5044 initializer may tell us how many elements are in the array.
5045 But, the elements of the array must be complete. */
5046 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5049 error ("elements of array %q#D have incomplete type", decl);
5051 error ("elements of array %q#T have incomplete type", type);
5054 /* It is not valid to initialize a VLA. */
5056 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5057 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5060 error ("variable-sized object %qD may not be initialized", decl);
5062 error ("variable-sized compound literal");
5068 /* Subroutine of check_initializer; args are passed down from that function.
5069 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5072 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5075 int saved_stmts_are_full_exprs_p = 0;
5076 if (building_stmt_tree ())
5078 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5079 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5081 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5082 if (building_stmt_tree ())
5083 current_stmt_tree ()->stmts_are_full_exprs_p =
5084 saved_stmts_are_full_exprs_p;
5088 /* Verify INIT (the initializer for DECL), and record the
5089 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5090 grok_reference_init.
5092 If the return value is non-NULL, it is an expression that must be
5093 evaluated dynamically to initialize DECL. */
5096 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5098 tree type = TREE_TYPE (decl);
5099 tree init_code = NULL;
5101 /* Things that are going to be initialized need to have complete
5103 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5105 if (type == error_mark_node)
5106 /* We will have already complained. */
5109 if (TREE_CODE (type) == ARRAY_TYPE)
5111 if (check_array_initializer (decl, type, init))
5114 else if (!COMPLETE_TYPE_P (type))
5116 error ("%qD has incomplete type", decl);
5117 TREE_TYPE (decl) = error_mark_node;
5121 /* There is no way to make a variable-sized class type in GNU C++. */
5122 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5124 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5126 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5127 if (SCALAR_TYPE_P (type))
5131 maybe_warn_cpp0x ("extended initializer lists");
5132 init = build_zero_init (type, NULL_TREE, false);
5134 else if (init_len != 1)
5136 error ("scalar object %qD requires one element in initializer",
5138 TREE_TYPE (decl) = error_mark_node;
5144 if (TREE_CODE (decl) == CONST_DECL)
5146 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5148 DECL_INITIAL (decl) = init;
5150 gcc_assert (init != NULL_TREE);
5153 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5154 init = grok_reference_init (decl, type, init, cleanup);
5157 /* Do not reshape constructors of vectors (they don't need to be
5159 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5161 if (is_std_init_list (type))
5162 return build_init_list_var_init (decl, type, init, cleanup);
5163 else if (TYPE_NON_AGGREGATE_CLASS (type))
5165 /* Don't reshape if the class has constructors. */
5166 if (cxx_dialect == cxx98)
5167 error ("in C++98 %qD must be initialized by constructor, "
5170 init = build_tree_list (NULL_TREE, init);
5172 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5174 error ("opaque vector types cannot be initialized");
5175 init = error_mark_node;
5178 init = reshape_init (type, init);
5181 /* If DECL has an array type without a specific bound, deduce the
5182 array size from the initializer. */
5183 maybe_deduce_size_from_array_init (decl, init);
5184 type = TREE_TYPE (decl);
5185 if (type == error_mark_node)
5188 if (TYPE_NEEDS_CONSTRUCTING (type)
5189 || (CLASS_TYPE_P (type)
5190 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5191 return build_aggr_init_full_exprs (decl, init, flags);
5192 else if (TREE_CODE (init) != TREE_VEC)
5194 init_code = store_init_value (decl, init, flags);
5195 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5196 && DECL_INITIAL (decl)
5197 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5198 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5199 warning (0, "array %qD initialized by parenthesized string literal %qE",
5200 decl, DECL_INITIAL (decl));
5204 else if (DECL_EXTERNAL (decl))
5206 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5207 return build_aggr_init_full_exprs (decl, init, flags);
5208 else if (MAYBE_CLASS_TYPE_P (type))
5210 tree core_type = strip_array_types (type);
5212 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5213 error ("structure %qD with uninitialized const members", decl);
5214 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5215 error ("structure %qD with uninitialized reference members", decl);
5217 check_for_uninitialized_const_var (decl);
5220 check_for_uninitialized_const_var (decl);
5222 if (init && init != error_mark_node)
5223 init_code = build2 (INIT_EXPR, type, decl, init);
5228 /* If DECL is not a local variable, give it RTL. */
5231 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5233 int toplev = toplevel_bindings_p ();
5235 const char *filename;
5237 /* Set the DECL_ASSEMBLER_NAME for the object. */
5240 /* The `register' keyword, when used together with an
5241 asm-specification, indicates that the variable should be
5242 placed in a particular register. */
5243 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5245 set_user_assembler_name (decl, asmspec);
5246 DECL_HARD_REGISTER (decl) = 1;
5250 if (TREE_CODE (decl) == FUNCTION_DECL
5251 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5252 set_builtin_user_assembler_name (decl, asmspec);
5253 set_user_assembler_name (decl, asmspec);
5257 /* Handle non-variables up front. */
5258 if (TREE_CODE (decl) != VAR_DECL)
5260 rest_of_decl_compilation (decl, toplev, at_eof);
5264 /* If we see a class member here, it should be a static data
5266 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5268 gcc_assert (TREE_STATIC (decl));
5269 /* An in-class declaration of a static data member should be
5270 external; it is only a declaration, and not a definition. */
5271 if (init == NULL_TREE)
5272 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5275 /* We don't create any RTL for local variables. */
5276 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5279 /* We defer emission of local statics until the corresponding
5280 DECL_EXPR is expanded. */
5281 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5283 /* We try to defer namespace-scope static constants so that they are
5284 not emitted into the object file unnecessarily. */
5285 filename = input_filename;
5286 if (!DECL_VIRTUAL_P (decl)
5287 && TREE_READONLY (decl)
5288 && DECL_INITIAL (decl) != NULL_TREE
5289 && DECL_INITIAL (decl) != error_mark_node
5291 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5293 && !TREE_PUBLIC (decl))
5295 /* Fool with the linkage of static consts according to #pragma
5297 struct c_fileinfo *finfo = get_fileinfo (filename);
5298 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5300 TREE_PUBLIC (decl) = 1;
5301 DECL_EXTERNAL (decl) = finfo->interface_only;
5306 /* Likewise for template instantiations. */
5307 else if (DECL_LANG_SPECIFIC (decl)
5308 && DECL_IMPLICIT_INSTANTIATION (decl))
5311 /* If we're not deferring, go ahead and assemble the variable. */
5313 rest_of_decl_compilation (decl, toplev, at_eof);
5316 /* walk_tree helper for wrap_temporary_cleanups, below. */
5319 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5321 if (TYPE_P (*stmt_p))
5327 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5329 tree guard = (tree)data;
5330 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5332 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5333 /* Tell honor_protect_cleanup_actions to handle this as a separate
5335 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5337 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5343 /* We're initializing a local variable which has a cleanup GUARD. If there
5344 are any temporaries used in the initializer INIT of this variable, we
5345 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5346 variable will be cleaned up properly if one of them throws.
5348 Unfortunately, there's no way to express this properly in terms of
5349 nesting, as the regions for the temporaries overlap the region for the
5350 variable itself; if there are two temporaries, the variable needs to be
5351 the first thing destroyed if either of them throws. However, we only
5352 want to run the variable's cleanup if it actually got constructed. So
5353 we need to guard the temporary cleanups with the variable's cleanup if
5354 they are run on the normal path, but not if they are run on the
5355 exceptional path. We implement this by telling
5356 honor_protect_cleanup_actions to strip the variable cleanup from the
5357 exceptional path. */
5360 wrap_temporary_cleanups (tree init, tree guard)
5362 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5365 /* Generate code to initialize DECL (a local variable). */
5368 initialize_local_var (tree decl, tree init)
5370 tree type = TREE_TYPE (decl);
5374 gcc_assert (TREE_CODE (decl) == VAR_DECL
5375 || TREE_CODE (decl) == RESULT_DECL);
5376 gcc_assert (!TREE_STATIC (decl));
5378 if (DECL_SIZE (decl) == NULL_TREE)
5380 /* If we used it already as memory, it must stay in memory. */
5381 DECL_INITIAL (decl) = NULL_TREE;
5382 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5386 if (type == error_mark_node)
5389 /* Compute and store the initial value. */
5390 already_used = TREE_USED (decl) || TREE_USED (type);
5392 /* Generate a cleanup, if necessary. */
5393 cleanup = cxx_maybe_build_cleanup (decl);
5395 /* Perform the initialization. */
5398 int saved_stmts_are_full_exprs_p;
5400 /* If we're only initializing a single object, guard the destructors
5401 of any temporaries used in its initializer with its destructor.
5402 This isn't right for arrays because each element initialization is
5403 a full-expression. */
5404 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5405 wrap_temporary_cleanups (init, cleanup);
5407 gcc_assert (building_stmt_tree ());
5408 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5409 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5410 finish_expr_stmt (init);
5411 current_stmt_tree ()->stmts_are_full_exprs_p =
5412 saved_stmts_are_full_exprs_p;
5415 /* Set this to 0 so we can tell whether an aggregate which was
5416 initialized was ever used. Don't do this if it has a
5417 destructor, so we don't complain about the 'resource
5418 allocation is initialization' idiom. Now set
5419 attribute((unused)) on types so decls of that type will be
5420 marked used. (see TREE_USED, above.) */
5421 if (TYPE_NEEDS_CONSTRUCTING (type)
5423 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5424 && DECL_NAME (decl))
5425 TREE_USED (decl) = 0;
5426 else if (already_used)
5427 TREE_USED (decl) = 1;
5430 finish_decl_cleanup (decl, cleanup);
5433 /* DECL is a VAR_DECL for a compiler-generated variable with static
5434 storage duration (like a virtual table) whose initializer is a
5435 compile-time constant. INIT must be either a TREE_LIST of values,
5436 or a CONSTRUCTOR. Initialize the variable and provide it to the
5440 initialize_artificial_var (tree decl, tree init)
5442 gcc_assert (DECL_ARTIFICIAL (decl));
5443 if (TREE_CODE (init) == TREE_LIST)
5444 init = build_constructor_from_list (TREE_TYPE (decl), init);
5445 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5446 DECL_INITIAL (decl) = init;
5447 DECL_INITIALIZED_P (decl) = 1;
5448 determine_visibility (decl);
5449 layout_var_decl (decl);
5450 maybe_commonize_var (decl);
5451 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5454 /* INIT is the initializer for a variable, as represented by the
5455 parser. Returns true iff INIT is value-dependent. */
5458 value_dependent_init_p (tree init)
5460 if (TREE_CODE (init) == TREE_LIST)
5461 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5462 return any_value_dependent_elements_p (init);
5463 else if (TREE_CODE (init) == CONSTRUCTOR)
5464 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5466 VEC(constructor_elt, gc) *elts;
5470 elts = CONSTRUCTOR_ELTS (init);
5471 nelts = VEC_length (constructor_elt, elts);
5472 for (i = 0; i < nelts; ++i)
5473 if (value_dependent_init_p (VEC_index (constructor_elt,
5478 /* It must be a simple expression, e.g., int i = 3; */
5479 return value_dependent_expression_p (init);
5484 /* Finish processing of a declaration;
5485 install its line number and initial value.
5486 If the length of an array type is not known before,
5487 it must be determined now, from the initial value, or it is an error.
5489 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5490 true, then INIT is an integral constant expression.
5492 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5493 if the (init) syntax was used. */
5496 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5497 tree asmspec_tree, int flags)
5501 const char *asmspec = NULL;
5502 int was_readonly = 0;
5503 bool var_definition_p = false;
5504 int saved_processing_template_decl;
5507 if (decl == error_mark_node)
5512 error ("assignment (not initialization) in declaration");
5516 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5517 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5518 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5520 type = TREE_TYPE (decl);
5521 if (type == error_mark_node)
5524 /* Assume no cleanup is required. */
5525 cleanup = NULL_TREE;
5526 saved_processing_template_decl = processing_template_decl;
5528 /* If a name was specified, get the string. */
5529 if (global_scope_p (current_binding_level))
5530 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5531 if (asmspec_tree && asmspec_tree != error_mark_node)
5532 asmspec = TREE_STRING_POINTER (asmspec_tree);
5534 if (current_class_type
5535 && CP_DECL_CONTEXT (decl) == current_class_type
5536 && TYPE_BEING_DEFINED (current_class_type)
5537 && (DECL_INITIAL (decl) || init))
5538 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5540 auto_node = type_uses_auto (type);
5543 if (init == NULL_TREE)
5545 error ("declaration of %q#D has no initializer", decl);
5546 TREE_TYPE (decl) = error_mark_node;
5549 if (TREE_CODE (init) == TREE_LIST)
5550 init = build_x_compound_expr_from_list (init, "initializer");
5551 if (describable_type (init))
5553 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5554 if (type == error_mark_node)
5559 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5561 if (init == ridpointers[(int)RID_DELETE])
5563 /* FIXME check this is 1st decl. */
5564 DECL_DELETED_FN (decl) = 1;
5565 DECL_DECLARED_INLINE_P (decl) = 1;
5566 DECL_INITIAL (decl) = error_mark_node;
5569 else if (init == ridpointers[(int)RID_DEFAULT])
5571 if (!defaultable_fn_p (decl))
5573 error ("%qD cannot be defaulted", decl);
5574 DECL_INITIAL (decl) = NULL_TREE;
5577 DECL_DEFAULTED_FN (decl) = 1;
5581 if (processing_template_decl)
5583 bool type_dependent_p;
5585 /* Add this declaration to the statement-tree. */
5586 if (at_function_scope_p ())
5587 add_decl_expr (decl);
5589 type_dependent_p = dependent_type_p (type);
5591 if (check_for_bare_parameter_packs (init))
5594 DECL_INITIAL (decl) = NULL_TREE;
5597 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5599 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5600 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5601 TREE_CONSTANT (decl) = 1;
5604 /* Generally, initializers in templates are expanded when the
5605 template is instantiated. But, if DECL is an integral
5606 constant static data member, then it can be used in future
5607 integral constant expressions, and its value must be
5610 && DECL_CLASS_SCOPE_P (decl)
5611 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5612 && !type_dependent_p
5613 && !value_dependent_init_p (init)))
5616 DECL_INITIAL (decl) = init;
5617 if (TREE_CODE (decl) == VAR_DECL
5618 && !DECL_PRETTY_FUNCTION_P (decl)
5619 && !type_dependent_p)
5620 maybe_deduce_size_from_array_init (decl, init);
5624 if (TREE_CODE (init) == TREE_LIST)
5626 /* If the parenthesized-initializer form was used (e.g.,
5627 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5628 arguments. (There is generally only one.) We convert them
5631 for (; list; list = TREE_CHAIN (list))
5633 tree elt = TREE_VALUE (list);
5634 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5638 init = fold_non_dependent_expr (init);
5639 processing_template_decl = 0;
5642 /* Take care of TYPE_DECLs up front. */
5643 if (TREE_CODE (decl) == TYPE_DECL)
5645 if (type != error_mark_node
5646 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5648 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5649 warning (0, "shadowing previous type declaration of %q#D", decl);
5650 set_identifier_type_value (DECL_NAME (decl), decl);
5653 /* If we have installed this as the canonical typedef for this
5654 type, and that type has not been defined yet, delay emitting
5655 the debug information for it, as we will emit it later. */
5656 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5657 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5658 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5660 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5665 /* A reference will be modified here, as it is initialized. */
5666 if (! DECL_EXTERNAL (decl)
5667 && TREE_READONLY (decl)
5668 && TREE_CODE (type) == REFERENCE_TYPE)
5671 TREE_READONLY (decl) = 0;
5674 if (TREE_CODE (decl) == VAR_DECL)
5676 /* Only PODs can have thread-local storage. Other types may require
5677 various kinds of non-trivial initialization. */
5678 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5679 error ("%qD cannot be thread-local because it has non-POD type %qT",
5680 decl, TREE_TYPE (decl));
5681 /* If this is a local variable that will need a mangled name,
5682 register it now. We must do this before processing the
5683 initializer for the variable, since the initialization might
5684 require a guard variable, and since the mangled name of the
5685 guard variable will depend on the mangled name of this
5687 if (DECL_FUNCTION_SCOPE_P (decl)
5688 && TREE_STATIC (decl)
5689 && !DECL_ARTIFICIAL (decl))
5690 push_local_name (decl);
5691 /* Convert the initializer to the type of DECL, if we have not
5692 already initialized DECL. */
5693 if (!DECL_INITIALIZED_P (decl)
5694 /* If !DECL_EXTERNAL then DECL is being defined. In the
5695 case of a static data member initialized inside the
5696 class-specifier, there can be an initializer even if DECL
5697 is *not* defined. */
5698 && (!DECL_EXTERNAL (decl) || init))
5700 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5703 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5704 /* Allow libjava/prims.cc define primitive classes. */
5705 if (init != NULL_TREE
5706 || jclass == NULL_TREE
5707 || TREE_CODE (jclass) != TYPE_DECL
5708 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5709 || !same_type_ignoring_top_level_qualifiers_p
5710 (type, TREE_TYPE (TREE_TYPE (jclass))))
5711 error ("Java object %qD not allocated with %<new%>", decl);
5716 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5717 if (init_const_expr_p)
5719 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5720 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5721 TREE_CONSTANT (decl) = 1;
5724 init = check_initializer (decl, init, flags, &cleanup);
5725 /* Thread-local storage cannot be dynamically initialized. */
5726 if (DECL_THREAD_LOCAL_P (decl) && init)
5728 error ("%qD is thread-local and so cannot be dynamically "
5729 "initialized", decl);
5733 /* Check that the initializer for a static data member was a
5734 constant. Although we check in the parser that the
5735 initializer is an integral constant expression, we do not
5736 simplify division-by-zero at the point at which it
5737 occurs. Therefore, in:
5739 struct S { static const int i = 7 / 0; };
5741 we issue an error at this point. It would
5742 probably be better to forbid division by zero in
5743 integral constant expressions. */
5744 if (DECL_EXTERNAL (decl) && init)
5746 error ("%qD cannot be initialized by a non-constant expression"
5747 " when being declared", decl);
5748 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5756 The memory occupied by any object of static storage
5757 duration is zero-initialized at program startup before
5758 any other initialization takes place.
5760 We cannot create an appropriate initializer until after
5761 the type of DECL is finalized. If DECL_INITIAL is set,
5762 then the DECL is statically initialized, and any
5763 necessary zero-initialization has already been performed. */
5764 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5765 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5766 /*nelts=*/NULL_TREE,
5767 /*static_storage_p=*/true);
5768 /* Remember that the initialization for this variable has
5770 DECL_INITIALIZED_P (decl) = 1;
5771 /* This declaration is the definition of this variable,
5772 unless we are initializing a static data member within
5773 the class specifier. */
5774 if (!DECL_EXTERNAL (decl))
5775 var_definition_p = true;
5777 /* If the variable has an array type, lay out the type, even if
5778 there is no initializer. It is valid to index through the
5779 array, and we must get TYPE_ALIGN set correctly on the array
5781 else if (TREE_CODE (type) == ARRAY_TYPE)
5784 else if (TREE_CODE (decl) == FIELD_DECL
5785 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5786 error ("non-static data member %qD has Java class type", decl);
5788 /* Add this declaration to the statement-tree. This needs to happen
5789 after the call to check_initializer so that the DECL_EXPR for a
5790 reference temp is added before the DECL_EXPR for the reference itself. */
5791 if (at_function_scope_p ())
5792 add_decl_expr (decl);
5794 /* Let the middle end know about variables and functions -- but not
5795 static data members in uninstantiated class templates. */
5796 if (!saved_processing_template_decl
5797 && (TREE_CODE (decl) == VAR_DECL
5798 || TREE_CODE (decl) == FUNCTION_DECL))
5800 if (TREE_CODE (decl) == VAR_DECL)
5802 layout_var_decl (decl);
5803 maybe_commonize_var (decl);
5806 /* This needs to happen after the linkage is set. */
5807 determine_visibility (decl);
5809 if (var_definition_p && TREE_STATIC (decl))
5811 /* If a TREE_READONLY variable needs initialization
5812 at runtime, it is no longer readonly and we need to
5813 avoid MEM_READONLY_P being set on RTL created for it. */
5816 if (TREE_READONLY (decl))
5817 TREE_READONLY (decl) = 0;
5820 else if (was_readonly)
5821 TREE_READONLY (decl) = 1;
5824 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5826 /* Check for abstractness of the type. Notice that there is no
5827 need to strip array types here since the check for those types
5828 is already done within create_array_type_for_decl. */
5829 if (TREE_CODE (type) == FUNCTION_TYPE
5830 || TREE_CODE (type) == METHOD_TYPE)
5831 abstract_virtuals_error (decl, TREE_TYPE (type));
5833 abstract_virtuals_error (decl, type);
5835 if (TREE_TYPE (decl) == error_mark_node)
5836 /* No initialization required. */
5838 else if (TREE_CODE (decl) == FUNCTION_DECL)
5842 if (init == ridpointers[(int)RID_DEFAULT])
5844 /* An out-of-class default definition is defined at
5845 the point where it is explicitly defaulted. */
5846 if (DECL_INITIAL (decl) == error_mark_node)
5847 synthesize_method (decl);
5850 error ("function %q#D is initialized like a variable", decl);
5852 /* else no initialization required. */
5854 else if (DECL_EXTERNAL (decl)
5855 && ! (DECL_LANG_SPECIFIC (decl)
5856 && DECL_NOT_REALLY_EXTERN (decl)))
5859 DECL_INITIAL (decl) = init;
5861 /* A variable definition. */
5862 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5863 /* Initialize the local variable. */
5864 initialize_local_var (decl, init);
5866 /* If a variable is defined, and then a subsequent
5867 definition with external linkage is encountered, we will
5868 get here twice for the same variable. We want to avoid
5869 calling expand_static_init more than once. For variables
5870 that are not static data members, we can call
5871 expand_static_init only when we actually process the
5872 initializer. It is not legal to redeclare a static data
5873 member, so this issue does not arise in that case. */
5874 else if (var_definition_p && TREE_STATIC (decl))
5875 expand_static_init (decl, init);
5878 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5879 reference, insert it in the statement-tree now. */
5881 push_cleanup (decl, cleanup, false);
5884 processing_template_decl = saved_processing_template_decl;
5887 TREE_READONLY (decl) = 1;
5889 /* If this was marked 'used', be sure it will be output. */
5890 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5891 mark_decl_referenced (decl);
5894 /* Returns a declaration for a VAR_DECL as if:
5896 extern "C" TYPE NAME;
5898 had been seen. Used to create compiler-generated global
5902 declare_global_var (tree name, tree type)
5906 push_to_top_level ();
5907 decl = build_decl (input_location, VAR_DECL, name, type);
5908 TREE_PUBLIC (decl) = 1;
5909 DECL_EXTERNAL (decl) = 1;
5910 DECL_ARTIFICIAL (decl) = 1;
5911 /* If the user has explicitly declared this variable (perhaps
5912 because the code we are compiling is part of a low-level runtime
5913 library), then it is possible that our declaration will be merged
5914 with theirs by pushdecl. */
5915 decl = pushdecl (decl);
5916 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5917 pop_from_top_level ();
5922 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5923 if "__cxa_atexit" is not being used) corresponding to the function
5924 to be called when the program exits. */
5927 get_atexit_fn_ptr_type (void)
5932 if (!atexit_fn_ptr_type_node)
5934 if (flag_use_cxa_atexit
5935 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5936 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5937 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5939 /* The parameter to "atexit" is "void (*)(void)". */
5940 arg_types = void_list_node;
5942 fn_type = build_function_type (void_type_node, arg_types);
5943 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5946 return atexit_fn_ptr_type_node;
5949 /* Returns a pointer to the `atexit' function. Note that if
5950 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5951 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5954 get_atexit_node (void)
5961 bool use_aeabi_atexit;
5966 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5968 /* The declaration for `__cxa_atexit' is:
5970 int __cxa_atexit (void (*)(void *), void *, void *)
5972 We build up the argument types and then then function type
5975 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5976 /* First, build the pointer-to-function type for the first
5978 fn_ptr_type = get_atexit_fn_ptr_type ();
5979 /* Then, build the rest of the argument types. */
5980 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5981 if (use_aeabi_atexit)
5983 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5984 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5988 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5989 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5991 /* And the final __cxa_atexit type. */
5992 fn_type = build_function_type (integer_type_node, arg_types);
5993 fn_ptr_type = build_pointer_type (fn_type);
5994 if (use_aeabi_atexit)
5995 name = "__aeabi_atexit";
5997 name = "__cxa_atexit";
6001 /* The declaration for `atexit' is:
6003 int atexit (void (*)());
6005 We build up the argument types and then then function type
6007 fn_ptr_type = get_atexit_fn_ptr_type ();
6008 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6009 /* Build the final atexit type. */
6010 fn_type = build_function_type (integer_type_node, arg_types);
6014 /* Now, build the function declaration. */
6015 push_lang_context (lang_name_c);
6016 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6017 mark_used (atexit_fndecl);
6018 pop_lang_context ();
6019 atexit_node = decay_conversion (atexit_fndecl);
6024 /* Returns the __dso_handle VAR_DECL. */
6027 get_dso_handle_node (void)
6029 if (dso_handle_node)
6030 return dso_handle_node;
6032 /* Declare the variable. */
6033 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6036 return dso_handle_node;
6039 /* Begin a new function with internal linkage whose job will be simply
6040 to destroy some particular variable. */
6042 static GTY(()) int start_cleanup_cnt;
6045 start_cleanup_fn (void)
6050 bool use_cxa_atexit = flag_use_cxa_atexit
6051 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6053 push_to_top_level ();
6055 /* No need to mangle this. */
6056 push_lang_context (lang_name_c);
6058 /* Build the name of the function. */
6059 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6060 /* Build the function declaration. */
6061 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6062 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6063 /* It's a function with internal linkage, generated by the
6065 TREE_PUBLIC (fndecl) = 0;
6066 DECL_ARTIFICIAL (fndecl) = 1;
6067 /* Make the function `inline' so that it is only emitted if it is
6068 actually needed. It is unlikely that it will be inlined, since
6069 it is only called via a function pointer, but we avoid unnecessary
6070 emissions this way. */
6071 DECL_DECLARED_INLINE_P (fndecl) = 1;
6072 DECL_INTERFACE_KNOWN (fndecl) = 1;
6073 /* Build the parameter. */
6078 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6079 DECL_CONTEXT (parmdecl) = fndecl;
6080 TREE_USED (parmdecl) = 1;
6081 DECL_ARGUMENTS (fndecl) = parmdecl;
6085 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6087 pop_lang_context ();
6089 return current_function_decl;
6092 /* Finish the cleanup function begun by start_cleanup_fn. */
6095 end_cleanup_fn (void)
6097 expand_or_defer_fn (finish_function (0));
6099 pop_from_top_level ();
6102 /* Generate code to handle the destruction of DECL, an object with
6103 static storage duration. */
6106 register_dtor_fn (tree decl)
6115 type = TREE_TYPE (decl);
6116 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6117 return void_zero_node;
6119 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6120 a class object, we can just pass the destructor to
6121 "__cxa_atexit"; we don't have to build a temporary function to do
6123 use_dtor = (flag_use_cxa_atexit
6124 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6125 && CLASS_TYPE_P (type));
6130 /* Find the destructor. */
6131 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6132 gcc_assert (idx >= 0);
6133 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6134 /* Make sure it is accessible. */
6135 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6139 /* Call build_cleanup before we enter the anonymous function so
6140 that any access checks will be done relative to the current
6141 scope, rather than the scope of the anonymous function. */
6142 build_cleanup (decl);
6144 /* Now start the function. */
6145 cleanup = start_cleanup_fn ();
6147 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6148 to the original function, rather than the anonymous one. That
6149 will make the back end think that nested functions are in use,
6150 which causes confusion. */
6151 push_deferring_access_checks (dk_no_check);
6152 fcall = build_cleanup (decl);
6153 pop_deferring_access_checks ();
6155 /* Create the body of the anonymous function. */
6156 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6157 finish_expr_stmt (fcall);
6158 finish_compound_stmt (compound_stmt);
6162 /* Call atexit with the cleanup function. */
6163 mark_used (cleanup);
6164 cleanup = build_address (cleanup);
6165 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6171 /* We must convert CLEANUP to the type that "__cxa_atexit"
6173 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6174 /* "__cxa_atexit" will pass the address of DECL to the
6175 cleanup function. */
6177 addr = build_address (decl);
6178 /* The declared type of the parameter to "__cxa_atexit" is
6179 "void *". For plain "T*", we could just let the
6180 machinery in cp_build_function_call convert it -- but if the
6181 type is "cv-qualified T *", then we need to convert it
6182 before passing it in, to avoid spurious errors. */
6183 addr = build_nop (ptr_type_node, addr);
6186 /* Since the cleanup functions we build ignore the address
6187 they're given, there's no reason to pass the actual address
6188 in, and, in general, it's cheaper to pass NULL than any
6190 addr = null_pointer_node;
6191 args = tree_cons (NULL_TREE,
6192 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6193 tf_warning_or_error),
6195 if (targetm.cxx.use_aeabi_atexit ())
6197 args = tree_cons (NULL_TREE, cleanup, args);
6198 args = tree_cons (NULL_TREE, addr, args);
6202 args = tree_cons (NULL_TREE, addr, args);
6203 args = tree_cons (NULL_TREE, cleanup, args);
6207 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6208 return cp_build_function_call (get_atexit_node (), args,
6209 tf_warning_or_error);
6212 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6213 is its initializer. Generate code to handle the construction
6214 and destruction of DECL. */
6217 expand_static_init (tree decl, tree init)
6219 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6220 gcc_assert (TREE_STATIC (decl));
6222 /* Some variables require no initialization. */
6224 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6225 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6228 if (DECL_FUNCTION_SCOPE_P (decl))
6230 /* Emit code to perform this initialization but once. */
6231 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6232 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6233 tree guard, guard_addr;
6234 tree acquire_fn, release_fn, abort_fn;
6237 /* Emit code to perform this initialization but once. This code
6240 static <type> guard;
6241 if (!guard.first_byte) {
6242 if (__cxa_guard_acquire (&guard)) {
6245 // Do initialization.
6246 flag = true; __cxa_guard_release (&guard);
6247 // Register variable for destruction at end of program.
6249 if (!flag) __cxa_guard_abort (&guard);
6253 Note that the `flag' variable is only set to 1 *after* the
6254 initialization is complete. This ensures that an exception,
6255 thrown during the construction, will cause the variable to
6256 reinitialized when we pass through this code again, as per:
6260 If the initialization exits by throwing an exception, the
6261 initialization is not complete, so it will be tried again
6262 the next time control enters the declaration.
6264 This process should be thread-safe, too; multiple threads
6265 should not be able to initialize the variable more than
6268 /* Create the guard variable. */
6269 guard = get_guard (decl);
6271 /* This optimization isn't safe on targets with relaxed memory
6272 consistency. On such targets we force synchronization in
6273 __cxa_guard_acquire. */
6274 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6276 /* Begin the conditional initialization. */
6277 if_stmt = begin_if_stmt ();
6278 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6279 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6282 if (flag_threadsafe_statics)
6284 guard_addr = build_address (guard);
6286 acquire_fn = get_identifier ("__cxa_guard_acquire");
6287 release_fn = get_identifier ("__cxa_guard_release");
6288 abort_fn = get_identifier ("__cxa_guard_abort");
6289 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6291 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6293 tree vfntype = build_function_type (void_type_node, argtypes);
6294 acquire_fn = push_library_fn
6295 (acquire_fn, build_function_type (integer_type_node, argtypes),
6297 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6298 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6302 release_fn = identifier_global_value (release_fn);
6303 abort_fn = identifier_global_value (abort_fn);
6306 inner_if_stmt = begin_if_stmt ();
6307 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6310 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6311 begin = get_target_expr (boolean_false_node);
6312 flag = TARGET_EXPR_SLOT (begin);
6314 TARGET_EXPR_CLEANUP (begin)
6315 = build3 (COND_EXPR, void_type_node, flag,
6317 build_call_n (abort_fn, 1, guard_addr));
6318 CLEANUP_EH_ONLY (begin) = 1;
6320 /* Do the initialization itself. */
6321 init = add_stmt_to_compound (begin, init);
6322 init = add_stmt_to_compound
6323 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6324 init = add_stmt_to_compound
6325 (init, build_call_n (release_fn, 1, guard_addr));
6328 init = add_stmt_to_compound (init, set_guard (guard));
6330 /* Use atexit to register a function for destroying this static
6332 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6334 finish_expr_stmt (init);
6336 if (flag_threadsafe_statics)
6338 finish_compound_stmt (inner_then_clause);
6339 finish_then_clause (inner_if_stmt);
6340 finish_if_stmt (inner_if_stmt);
6343 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6345 finish_compound_stmt (then_clause);
6346 finish_then_clause (if_stmt);
6347 finish_if_stmt (if_stmt);
6351 static_aggregates = tree_cons (init, decl, static_aggregates);
6355 /* Make TYPE a complete type based on INITIAL_VALUE.
6356 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6357 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6358 3 if the initializer list is empty (in pedantic mode). */
6361 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6364 tree type, elt_type;
6368 unsigned HOST_WIDE_INT i;
6371 /* An array of character type can be initialized from a
6372 brace-enclosed string constant.
6374 FIXME: this code is duplicated from reshape_init. Probably
6375 we should just call reshape_init here? */
6376 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6377 && TREE_CODE (initial_value) == CONSTRUCTOR
6378 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6380 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6381 tree value = VEC_index (constructor_elt, v, 0)->value;
6383 if (TREE_CODE (value) == STRING_CST
6384 && VEC_length (constructor_elt, v) == 1)
6385 initial_value = value;
6388 /* If any of the elements are parameter packs, we can't actually
6389 complete this type now because the array size is dependent. */
6390 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6392 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6395 if (PACK_EXPANSION_P (value))
6401 failure = complete_array_type (ptype, initial_value, do_default);
6403 /* We can create the array before the element type is complete, which
6404 means that we didn't have these two bits set in the original type
6405 either. In completing the type, we are expected to propagate these
6406 bits. See also complete_type which does the same thing for arrays
6409 if (TYPE_DOMAIN (type))
6411 elt_type = TREE_TYPE (type);
6412 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6413 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6414 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6420 /* Return zero if something is declared to be a member of type
6421 CTYPE when in the context of CUR_TYPE. STRING is the error
6422 message to print in that case. Otherwise, quietly return 1. */
6425 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6427 if (ctype && ctype != cur_type)
6429 if (flags == DTOR_FLAG)
6430 error ("destructor for alien class %qT cannot be a member", ctype);
6432 error ("constructor for alien class %qT cannot be a member", ctype);
6438 /* Subroutine of `grokdeclarator'. */
6440 /* Generate errors possibly applicable for a given set of specifiers.
6441 This is for ARM $7.1.2. */
6444 bad_specifiers (tree object,
6453 error ("%qD declared as a %<virtual%> %s", object, type);
6455 error ("%qD declared as an %<inline%> %s", object, type);
6457 error ("%<const%> and %<volatile%> function specifiers on "
6458 "%qD invalid in %s declaration",
6461 error ("%q+D declared as a friend", object);
6463 && (TREE_CODE (object) == TYPE_DECL
6464 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6465 && !TYPE_REFFN_P (TREE_TYPE (object))
6466 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6467 error ("%q+D declared with an exception specification", object);
6470 /* DECL is a member function or static data member and is presently
6471 being defined. Check that the definition is taking place in a
6475 check_class_member_definition_namespace (tree decl)
6477 /* These checks only apply to member functions and static data
6479 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6480 || TREE_CODE (decl) == VAR_DECL);
6481 /* We check for problems with specializations in pt.c in
6482 check_specialization_namespace, where we can issue better
6484 if (processing_specialization)
6486 /* There are no restrictions on the placement of
6487 explicit instantiations. */
6488 if (processing_explicit_instantiation)
6492 A member function definition that appears outside of the
6493 class definition shall appear in a namespace scope enclosing
6494 the class definition.
6498 The definition for a static data member shall appear in a
6499 namespace scope enclosing the member's class definition. */
6500 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6501 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6502 decl, DECL_CONTEXT (decl));
6505 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6506 METHOD_TYPE for a non-static member function; QUALS are the
6507 cv-qualifiers that apply to the function. */
6510 build_this_parm (tree type, cp_cv_quals quals)
6515 cp_cv_quals this_quals;
6517 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6518 /* The `this' parameter is implicitly `const'; it cannot be
6520 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6521 qual_type = cp_build_qualified_type (this_type, this_quals);
6522 parm = build_artificial_parm (this_identifier, qual_type);
6523 cp_apply_type_quals_to_decl (this_quals, parm);
6527 /* CTYPE is class type, or null if non-class.
6528 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6530 DECLARATOR is the function's name.
6531 PARMS is a chain of PARM_DECLs for the function.
6532 VIRTUALP is truthvalue of whether the function is virtual or not.
6533 FLAGS are to be passed through to `grokclassfn'.
6534 QUALS are qualifiers indicating whether the function is `const'
6536 RAISES is a list of exceptions that this function can raise.
6537 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6538 not look, and -1 if we should not call `grokclassfn' at all.
6540 SFK is the kind of special function (if any) for the new function.
6542 Returns `NULL_TREE' if something goes wrong, after issuing
6543 applicable error messages. */
6546 grokfndecl (tree ctype,
6550 tree orig_declarator,
6552 enum overload_flags flags,
6559 special_function_kind sfk,
6564 location_t location)
6567 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6571 type = build_exception_variant (type, raises);
6573 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6575 /* If we have an explicit location, use it, otherwise use whatever
6576 build_lang_decl used (probably input_location). */
6577 if (location != UNKNOWN_LOCATION)
6578 DECL_SOURCE_LOCATION (decl) = location;
6580 if (TREE_CODE (type) == METHOD_TYPE)
6583 parm = build_this_parm (type, quals);
6584 TREE_CHAIN (parm) = parms;
6587 DECL_ARGUMENTS (decl) = parms;
6588 for (t = parms; t; t = TREE_CHAIN (t))
6589 DECL_CONTEXT (t) = decl;
6590 /* Propagate volatile out from type to decl. */
6591 if (TYPE_VOLATILE (type))
6592 TREE_THIS_VOLATILE (decl) = 1;
6594 /* Setup decl according to sfk. */
6597 case sfk_constructor:
6598 case sfk_copy_constructor:
6599 DECL_CONSTRUCTOR_P (decl) = 1;
6601 case sfk_destructor:
6602 DECL_DESTRUCTOR_P (decl) = 1;
6608 /* If pointers to member functions use the least significant bit to
6609 indicate whether a function is virtual, ensure a pointer
6610 to this function will have that bit clear. */
6611 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6612 && TREE_CODE (type) == METHOD_TYPE
6613 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6614 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6617 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6621 ("defining explicit specialization %qD in friend declaration",
6625 tree fns = TREE_OPERAND (orig_declarator, 0);
6626 tree args = TREE_OPERAND (orig_declarator, 1);
6628 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6630 /* Something like `template <class T> friend void f<T>()'. */
6631 error ("invalid use of template-id %qD in declaration "
6632 "of primary template",
6638 /* A friend declaration of the form friend void f<>(). Record
6639 the information in the TEMPLATE_ID_EXPR. */
6640 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6642 if (TREE_CODE (fns) == COMPONENT_REF)
6644 /* Due to bison parser ickiness, we will have already looked
6645 up an operator_name or PFUNCNAME within the current class
6646 (see template_id in parse.y). If the current class contains
6647 such a name, we'll get a COMPONENT_REF here. Undo that. */
6649 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6650 == current_class_type);
6651 fns = TREE_OPERAND (fns, 1);
6653 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6654 || TREE_CODE (fns) == OVERLOAD);
6655 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6657 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6658 if (TREE_PURPOSE (t)
6659 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6661 error ("default arguments are not allowed in declaration "
6662 "of friend template specialization %qD",
6669 error ("%<inline%> is not allowed in declaration of friend "
6670 "template specialization %qD",
6677 /* If this decl has namespace scope, set that up. */
6679 set_decl_namespace (decl, in_namespace, friendp);
6681 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6683 /* `main' and builtins have implicit 'C' linkage. */
6684 if ((MAIN_NAME_P (declarator)
6685 || (IDENTIFIER_LENGTH (declarator) > 10
6686 && IDENTIFIER_POINTER (declarator)[0] == '_'
6687 && IDENTIFIER_POINTER (declarator)[1] == '_'
6688 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6689 && current_lang_name == lang_name_cplusplus
6690 && ctype == NULL_TREE
6691 /* NULL_TREE means global namespace. */
6692 && DECL_CONTEXT (decl) == NULL_TREE)
6693 SET_DECL_LANGUAGE (decl, lang_c);
6695 /* Should probably propagate const out from type to decl I bet (mrs). */
6698 DECL_STATIC_FUNCTION_P (decl) = 1;
6699 DECL_CONTEXT (decl) = ctype;
6704 DECL_CONTEXT (decl) = ctype;
6706 check_class_member_definition_namespace (decl);
6709 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6711 if (processing_template_decl)
6712 error ("cannot declare %<::main%> to be a template");
6714 error ("cannot declare %<::main%> to be inline");
6716 error ("cannot declare %<::main%> to be static");
6721 /* Members of anonymous types and local classes have no linkage; make
6722 them internal. If a typedef is made later, this will be changed. */
6723 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6724 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6729 /* [basic.link]: A name with no linkage (notably, the name of a class
6730 or enumeration declared in a local scope) shall not be used to
6731 declare an entity with linkage.
6733 Only check this for public decls for now. See core 319, 389. */
6734 t = no_linkage_check (TREE_TYPE (decl),
6735 /*relaxed_p=*/false);
6738 if (TYPE_ANONYMOUS_P (t))
6740 if (DECL_EXTERN_C_P (decl))
6741 /* Allow this; it's pretty common in C. */;
6744 permerror (input_location, "non-local function %q#D uses anonymous type",
6746 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6747 permerror (input_location, "%q+#D does not refer to the unqualified "
6748 "type, so it is not used for linkage",
6753 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6757 TREE_PUBLIC (decl) = publicp;
6760 DECL_INTERFACE_KNOWN (decl) = 1;
6761 DECL_NOT_REALLY_EXTERN (decl) = 1;
6764 /* If the declaration was declared inline, mark it as such. */
6766 DECL_DECLARED_INLINE_P (decl) = 1;
6768 DECL_EXTERNAL (decl) = 1;
6769 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6772 ? G_("static member function %qD cannot have cv-qualifier")
6773 : G_("non-member function %qD cannot have cv-qualifier"),
6775 quals = TYPE_UNQUALIFIED;
6778 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6779 && !grok_op_properties (decl, /*complain=*/true))
6782 if (ctype && decl_function_context (decl))
6783 DECL_NO_STATIC_CHAIN (decl) = 1;
6786 /* Make the init_value nonzero so pushdecl knows this is not
6787 tentative. error_mark_node is replaced later with the BLOCK. */
6788 DECL_INITIAL (decl) = error_mark_node;
6790 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6791 TREE_NOTHROW (decl) = 1;
6793 /* Caller will do the rest of this. */
6797 if (ctype != NULL_TREE)
6798 grokclassfn (ctype, decl, flags);
6800 decl = check_explicit_specialization (orig_declarator, decl,
6803 4 * (friendp != 0));
6804 if (decl == error_mark_node)
6809 cplus_decl_attributes (&decl, *attrlist, 0);
6810 *attrlist = NULL_TREE;
6813 /* Check main's type after attributes have been applied. */
6814 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6816 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6819 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6821 error ("%<::main%> must return %<int%>");
6822 newtype = build_function_type (integer_type_node, oldtypeargs);
6823 TREE_TYPE (decl) = newtype;
6826 check_main_parameter_types (decl);
6829 if (ctype != NULL_TREE
6830 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6833 tree old_decl = check_classfn (ctype, decl,
6834 (processing_template_decl
6835 > template_class_depth (ctype))
6836 ? current_template_parms
6839 if (old_decl == error_mark_node)
6847 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6848 /* Because grokfndecl is always supposed to return a
6849 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6850 here. We depend on our callers to figure out that its
6851 really a template that's being returned. */
6852 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6854 if (DECL_STATIC_FUNCTION_P (old_decl)
6855 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6856 /* Remove the `this' parm added by grokclassfn.
6857 XXX Isn't this done in start_function, too? */
6858 revert_static_member_fn (decl);
6859 if (DECL_ARTIFICIAL (old_decl))
6861 error ("definition of implicitly-declared %qD", old_decl);
6865 /* Since we've smashed OLD_DECL to its
6866 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6867 if (TREE_CODE (decl) == TEMPLATE_DECL)
6868 decl = DECL_TEMPLATE_RESULT (decl);
6870 /* Attempt to merge the declarations. This can fail, in
6871 the case of some invalid specialization declarations. */
6872 pushed_scope = push_scope (ctype);
6873 ok = duplicate_decls (decl, old_decl, friendp);
6875 pop_scope (pushed_scope);
6878 error ("no %q#D member function declared in class %qT",
6886 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6889 if (ctype == NULL_TREE || check)
6893 DECL_VIRTUAL_P (decl) = 1;
6898 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6899 the linkage that DECL will receive in the object file. */
6902 set_linkage_for_static_data_member (tree decl)
6904 /* A static data member always has static storage duration and
6905 external linkage. Note that static data members are forbidden in
6906 local classes -- the only situation in which a class has
6907 non-external linkage. */
6908 TREE_PUBLIC (decl) = 1;
6909 TREE_STATIC (decl) = 1;
6910 /* For non-template classes, static data members are always put
6911 out in exactly those files where they are defined, just as
6912 with ordinary namespace-scope variables. */
6913 if (!processing_template_decl)
6914 DECL_INTERFACE_KNOWN (decl) = 1;
6917 /* Create a VAR_DECL named NAME with the indicated TYPE.
6919 If SCOPE is non-NULL, it is the class type or namespace containing
6920 the variable. If SCOPE is NULL, the variable should is created in
6921 the innermost enclosings scope. */
6924 grokvardecl (tree type,
6926 const cp_decl_specifier_seq *declspecs,
6932 tree explicit_scope;
6934 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6936 /* Compute the scope in which to place the variable, but remember
6937 whether or not that scope was explicitly specified by the user. */
6938 explicit_scope = scope;
6941 /* An explicit "extern" specifier indicates a namespace-scope
6943 if (declspecs->storage_class == sc_extern)
6944 scope = current_namespace;
6945 else if (!at_function_scope_p ())
6946 scope = current_scope ();
6950 && (/* If the variable is a namespace-scope variable declared in a
6951 template, we need DECL_LANG_SPECIFIC. */
6952 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6953 /* Similarly for namespace-scope variables with language linkage
6955 || (TREE_CODE (scope) == NAMESPACE_DECL
6956 && current_lang_name != lang_name_cplusplus)
6957 /* Similarly for static data members. */
6959 decl = build_lang_decl (VAR_DECL, name, type);
6961 decl = build_decl (input_location, VAR_DECL, name, type);
6963 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6964 set_decl_namespace (decl, explicit_scope, 0);
6966 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6968 if (declspecs->storage_class == sc_extern)
6970 DECL_THIS_EXTERN (decl) = 1;
6971 DECL_EXTERNAL (decl) = !initialized;
6974 if (DECL_CLASS_SCOPE_P (decl))
6976 set_linkage_for_static_data_member (decl);
6977 /* This function is only called with out-of-class definitions. */
6978 DECL_EXTERNAL (decl) = 0;
6979 check_class_member_definition_namespace (decl);
6981 /* At top level, either `static' or no s.c. makes a definition
6982 (perhaps tentative), and absence of `static' makes it public. */
6983 else if (toplevel_bindings_p ())
6985 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6986 && (DECL_THIS_EXTERN (decl) || ! constp));
6987 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6989 /* Not at top level, only `static' makes a static definition. */
6992 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6993 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6996 if (declspecs->specs[(int)ds_thread])
6997 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6999 if (TREE_PUBLIC (decl))
7001 /* [basic.link]: A name with no linkage (notably, the name of a class
7002 or enumeration declared in a local scope) shall not be used to
7003 declare an entity with linkage.
7005 Only check this for public decls for now. */
7006 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7009 if (TYPE_ANONYMOUS_P (t))
7011 if (DECL_EXTERN_C_P (decl))
7012 /* Allow this; it's pretty common in C. */
7016 /* DRs 132, 319 and 389 seem to indicate types with
7017 no linkage can only be used to declare extern "C"
7018 entities. Since it's not always an error in the
7019 ISO C++ 90 Standard, we only issue a warning. */
7020 warning (0, "non-local variable %q#D uses anonymous type",
7022 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7023 warning (0, "%q+#D does not refer to the unqualified "
7024 "type, so it is not used for linkage",
7029 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7033 DECL_INTERFACE_KNOWN (decl) = 1;
7038 /* Create and return a canonical pointer to member function type, for
7039 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7042 build_ptrmemfunc_type (tree type)
7046 tree unqualified_variant = NULL_TREE;
7048 if (type == error_mark_node)
7051 /* If a canonical type already exists for this type, use it. We use
7052 this method instead of type_hash_canon, because it only does a
7053 simple equality check on the list of field members. */
7055 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7058 /* Make sure that we always have the unqualified pointer-to-member
7060 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7062 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7064 t = make_class_type (RECORD_TYPE);
7065 xref_basetypes (t, NULL_TREE);
7067 /* Let the front end know this is a pointer to member function... */
7068 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7069 /* ... and not really a class type. */
7070 SET_CLASS_TYPE_P (t, 0);
7072 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7075 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7077 TREE_CHAIN (field) = fields;
7080 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7082 /* Zap out the name so that the back end will give us the debugging
7083 information for this anonymous RECORD_TYPE. */
7084 TYPE_NAME (t) = NULL_TREE;
7086 /* If this is not the unqualified form of this pointer-to-member
7087 type, set the TYPE_MAIN_VARIANT for this type to be the
7088 unqualified type. Since they are actually RECORD_TYPEs that are
7089 not variants of each other, we must do this manually. */
7090 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7092 t = build_qualified_type (t, cp_type_quals (type));
7093 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7094 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7095 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7096 TREE_TYPE (TYPE_BINFO (t)) = t;
7099 /* Cache this pointer-to-member type so that we can find it again
7101 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7103 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7104 SET_TYPE_STRUCTURAL_EQUALITY (t);
7105 else if (TYPE_CANONICAL (type) != type)
7106 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7111 /* Create and return a pointer to data member type. */
7114 build_ptrmem_type (tree class_type, tree member_type)
7116 if (TREE_CODE (member_type) == METHOD_TYPE)
7120 arg_types = TYPE_ARG_TYPES (member_type);
7121 class_type = (cp_build_qualified_type
7123 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7125 = build_method_type_directly (class_type,
7126 TREE_TYPE (member_type),
7127 TREE_CHAIN (arg_types));
7128 return build_ptrmemfunc_type (build_pointer_type (member_type));
7132 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7133 return build_offset_type (class_type, member_type);
7137 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7138 Check to see that the definition is valid. Issue appropriate error
7139 messages. Return 1 if the definition is particularly bad, or 0
7143 check_static_variable_definition (tree decl, tree type)
7145 /* Motion 10 at San Diego: If a static const integral data member is
7146 initialized with an integral constant expression, the initializer
7147 may appear either in the declaration (within the class), or in
7148 the definition, but not both. If it appears in the class, the
7149 member is a member constant. The file-scope definition is always
7151 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7153 error ("invalid in-class initialization of static data member "
7154 "of non-integral type %qT",
7156 /* If we just return the declaration, crashes will sometimes
7157 occur. We therefore return void_type_node, as if this were a
7158 friend declaration, to cause callers to completely ignore
7159 this declaration. */
7162 else if (!CP_TYPE_CONST_P (type))
7163 error ("ISO C++ forbids in-class initialization of non-const "
7164 "static member %qD",
7166 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7167 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7168 "%qD of non-integral type %qT", decl, type);
7173 /* Given the SIZE (i.e., number of elements) in an array, compute an
7174 appropriate index type for the array. If non-NULL, NAME is the
7175 name of the thing being declared. */
7178 compute_array_index_type (tree name, tree size)
7182 tree abi_1_itype = NULL_TREE;
7184 if (error_operand_p (size))
7185 return error_mark_node;
7187 type = TREE_TYPE (size);
7188 /* The array bound must be an integer type. */
7189 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7192 error ("size of array %qD has non-integral type %qT", name, type);
7194 error ("size of array has non-integral type %qT", type);
7195 size = integer_one_node;
7196 type = TREE_TYPE (size);
7199 /* We can only call value_dependent_expression_p on integral constant
7200 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7201 set if this isn't one. */
7202 if (processing_template_decl
7203 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7205 /* We cannot do any checking for a SIZE that isn't known to be
7206 constant. Just build the index type and mark that it requires
7207 structural equality checks. */
7208 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7209 size, integer_one_node));
7210 if (!TREE_SIDE_EFFECTS (size))
7212 TYPE_DEPENDENT_P (itype) = 1;
7213 TYPE_DEPENDENT_P_VALID (itype) = 1;
7215 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7219 if (!abi_version_at_least (2) && processing_template_decl)
7220 /* For abi-1, we handled all instances in templates the same way,
7221 even when they were non-dependent. This affects the manglings
7222 produced. So, we do the normal checking for non-dependent
7223 sizes, but at the end we'll return the same type that abi-1
7224 would have, but with TYPE_CANONICAL set to the "right"
7225 value that the current ABI would provide. */
7226 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7227 size, integer_one_node));
7229 /* The size might be the result of a cast. */
7230 STRIP_TYPE_NOPS (size);
7232 /* It might be a const variable or enumeration constant. */
7233 size = integral_constant_value (size);
7235 /* Normally, the array-bound will be a constant. */
7236 if (TREE_CODE (size) == INTEGER_CST)
7238 /* Check to see if the array bound overflowed. Make that an
7239 error, no matter how generous we're being. */
7240 constant_expression_error (size);
7242 /* An array must have a positive number of elements. */
7243 if (INT_CST_LT (size, integer_zero_node))
7246 error ("size of array %qD is negative", name);
7248 error ("size of array is negative");
7249 size = integer_one_node;
7251 /* As an extension we allow zero-sized arrays. We always allow
7252 them in system headers because glibc uses them. */
7253 else if (integer_zerop (size) && !in_system_header)
7256 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7258 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7261 else if (TREE_CONSTANT (size))
7263 /* `(int) &fn' is not a valid array bound. */
7265 error ("size of array %qD is not an integral constant-expression",
7268 error ("size of array is not an integral constant-expression");
7269 size = integer_one_node;
7271 else if (pedantic && warn_vla != 0)
7274 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7276 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7278 else if (warn_vla > 0)
7282 "variable length array %qD is used", name);
7285 "variable length array is used");
7288 if (processing_template_decl && !TREE_CONSTANT (size))
7289 /* A variable sized array. */
7290 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7293 HOST_WIDE_INT saved_processing_template_decl;
7295 /* Compute the index of the largest element in the array. It is
7296 one less than the number of elements in the array. We save
7297 and restore PROCESSING_TEMPLATE_DECL so that computations in
7298 cp_build_binary_op will be appropriately folded. */
7299 saved_processing_template_decl = processing_template_decl;
7300 processing_template_decl = 0;
7301 itype = cp_build_binary_op (input_location,
7303 cp_convert (ssizetype, size),
7304 cp_convert (ssizetype, integer_one_node),
7305 tf_warning_or_error);
7306 itype = fold (itype);
7307 processing_template_decl = saved_processing_template_decl;
7309 if (!TREE_CONSTANT (itype))
7310 /* A variable sized array. */
7311 itype = variable_size (itype);
7312 /* Make sure that there was no overflow when creating to a signed
7313 index type. (For example, on a 32-bit machine, an array with
7314 size 2^32 - 1 is too big.) */
7315 else if (TREE_CODE (itype) == INTEGER_CST
7316 && TREE_OVERFLOW (itype))
7318 error ("overflow in array dimension");
7319 TREE_OVERFLOW (itype) = 0;
7323 /* Create and return the appropriate index type. */
7326 tree t = build_index_type (itype);
7327 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7331 return build_index_type (itype);
7334 /* Returns the scope (if any) in which the entity declared by
7335 DECLARATOR will be located. If the entity was declared with an
7336 unqualified name, NULL_TREE is returned. */
7339 get_scope_of_declarator (const cp_declarator *declarator)
7341 while (declarator && declarator->kind != cdk_id)
7342 declarator = declarator->declarator;
7344 /* If the declarator-id is a SCOPE_REF, the scope in which the
7345 declaration occurs is the first operand. */
7347 && declarator->u.id.qualifying_scope)
7348 return declarator->u.id.qualifying_scope;
7350 /* Otherwise, the declarator is not a qualified name; the entity will
7351 be declared in the current scope. */
7355 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7356 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7360 create_array_type_for_decl (tree name, tree type, tree size)
7362 tree itype = NULL_TREE;
7363 const char* error_msg;
7365 /* If things have already gone awry, bail now. */
7366 if (type == error_mark_node || size == error_mark_node)
7367 return error_mark_node;
7369 /* Assume that everything will go OK. */
7372 /* There are some types which cannot be array elements. */
7373 switch (TREE_CODE (type))
7376 error_msg = "array of void";
7380 error_msg = "array of functions";
7383 case REFERENCE_TYPE:
7384 error_msg = "array of references";
7388 error_msg = "array of function members";
7395 /* If something went wrong, issue an error-message and return. */
7399 error ("declaration of %qD as %s", name, error_msg);
7401 error ("creating %s", error_msg);
7403 return error_mark_node;
7408 The constant expressions that specify the bounds of the arrays
7409 can be omitted only for the first member of the sequence. */
7410 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7413 error ("declaration of %qD as multidimensional array must "
7414 "have bounds for all dimensions except the first",
7417 error ("multidimensional array must have bounds for all "
7418 "dimensions except the first");
7420 return error_mark_node;
7423 /* Figure out the index type for the array. */
7425 itype = compute_array_index_type (name, size);
7428 T is called the array element type; this type shall not be [...] an
7429 abstract class type. */
7430 abstract_virtuals_error (name, type);
7432 return build_cplus_array_type (type, itype);
7435 /* Check that it's OK to declare a function with the indicated TYPE.
7436 SFK indicates the kind of special function (if any) that this
7437 function is. OPTYPE is the type given in a conversion operator
7438 declaration, or the class type for a constructor/destructor.
7439 Returns the actual return type of the function; that
7440 may be different than TYPE if an error occurs, or for certain
7441 special functions. */
7444 check_special_function_return_type (special_function_kind sfk,
7450 case sfk_constructor:
7452 error ("return type specification for constructor invalid");
7454 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7455 type = build_pointer_type (optype);
7457 type = void_type_node;
7460 case sfk_destructor:
7462 error ("return type specification for destructor invalid");
7463 /* We can't use the proper return type here because we run into
7464 problems with ambiguous bases and covariant returns.
7465 Java classes are left unchanged because (void *) isn't a valid
7466 Java type, and we don't want to change the Java ABI. */
7467 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7468 type = build_pointer_type (void_type_node);
7470 type = void_type_node;
7473 case sfk_conversion:
7475 error ("return type specified for %<operator %T%>", optype);
7486 /* A variable or data member (whose unqualified name is IDENTIFIER)
7487 has been declared with the indicated TYPE. If the TYPE is not
7488 acceptable, issue an error message and return a type to use for
7489 error-recovery purposes. */
7492 check_var_type (tree identifier, tree type)
7494 if (VOID_TYPE_P (type))
7497 error ("unnamed variable or field declared void");
7498 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7500 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7501 error ("variable or field %qE declared void", identifier);
7504 error ("variable or field declared void");
7505 type = error_mark_node;
7511 /* Given declspecs and a declarator (abstract or otherwise), determine
7512 the name and type of the object declared and construct a DECL node
7515 DECLSPECS points to the representation of declaration-specifier
7516 sequence that precedes declarator.
7518 DECL_CONTEXT says which syntactic context this declaration is in:
7519 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7520 FUNCDEF for a function definition. Like NORMAL but a few different
7521 error messages in each case. Return value may be zero meaning
7522 this definition is too screwy to try to parse.
7523 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7524 handle member functions (which have FIELD context).
7525 Return value may be zero meaning this definition is too screwy to
7527 PARM for a parameter declaration (either within a function prototype
7528 or before a function body). Make a PARM_DECL, or return void_type_node.
7529 CATCHPARM for a parameter declaration before a catch clause.
7530 TYPENAME if for a typename (in a cast or sizeof).
7531 Don't make a DECL node; just return the ..._TYPE node.
7532 FIELD for a struct or union field; make a FIELD_DECL.
7533 BITFIELD for a field with specified width.
7534 INITIALIZED is as for start_decl.
7536 ATTRLIST is a pointer to the list of attributes, which may be NULL
7537 if there are none; *ATTRLIST may be modified if attributes from inside
7538 the declarator should be applied to the declaration.
7540 When this function is called, scoping variables (such as
7541 CURRENT_CLASS_TYPE) should reflect the scope in which the
7542 declaration occurs, not the scope in which the new declaration will
7543 be placed. For example, on:
7547 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7550 Returns a DECL (if a declarator is present), a TYPE (if there is no
7551 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7555 grokdeclarator (const cp_declarator *declarator,
7556 const cp_decl_specifier_seq *declspecs,
7557 enum decl_context decl_context,
7561 tree type = NULL_TREE;
7563 int virtualp, explicitp, friendp, inlinep, staticp;
7564 int explicit_int = 0;
7565 int explicit_char = 0;
7566 int defaulted_int = 0;
7567 tree dependent_name = NULL_TREE;
7569 tree typedef_decl = NULL_TREE;
7570 const char *name = NULL;
7571 tree typedef_type = NULL_TREE;
7572 /* True if this declarator is a function definition. */
7573 bool funcdef_flag = false;
7574 cp_declarator_kind innermost_code = cdk_error;
7577 /* See the code below that used this. */
7578 tree decl_attr = NULL_TREE;
7581 /* Keep track of what sort of function is being processed
7582 so that we can warn about default return values, or explicit
7583 return values which do not match prescribed defaults. */
7584 special_function_kind sfk = sfk_none;
7586 tree dname = NULL_TREE;
7587 tree ctor_return_type = NULL_TREE;
7588 enum overload_flags flags = NO_SPECIAL;
7589 /* cv-qualifiers that apply to the declarator, for a declaration of
7590 a member function. */
7591 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7592 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7594 tree raises = NULL_TREE;
7595 int template_count = 0;
7596 tree returned_attrs = NULL_TREE;
7597 tree parms = NULL_TREE;
7598 const cp_declarator *id_declarator;
7599 /* The unqualified name of the declarator; either an
7600 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7601 tree unqualified_id;
7602 /* The class type, if any, in which this entity is located,
7603 or NULL_TREE if none. Note that this value may be different from
7604 the current class type; for example if an attempt is made to declare
7605 "A::f" inside "B", this value will be "A". */
7606 tree ctype = current_class_type;
7607 /* The NAMESPACE_DECL for the namespace in which this entity is
7608 located. If an unqualified name is used to declare the entity,
7609 this value will be NULL_TREE, even if the entity is located at
7611 tree in_namespace = NULL_TREE;
7612 cp_storage_class storage_class;
7613 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7614 bool type_was_error_mark_node = false;
7615 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7616 bool set_no_warning = false;
7617 bool template_type_arg = false;
7620 signed_p = declspecs->specs[(int)ds_signed];
7621 unsigned_p = declspecs->specs[(int)ds_unsigned];
7622 short_p = declspecs->specs[(int)ds_short];
7623 long_p = declspecs->specs[(int)ds_long];
7624 longlong = declspecs->specs[(int)ds_long] >= 2;
7625 thread_p = declspecs->specs[(int)ds_thread];
7627 if (decl_context == FUNCDEF)
7628 funcdef_flag = true, decl_context = NORMAL;
7629 else if (decl_context == MEMFUNCDEF)
7630 funcdef_flag = true, decl_context = FIELD;
7631 else if (decl_context == BITFIELD)
7632 bitfield = 1, decl_context = FIELD;
7633 else if (decl_context == TEMPLATE_TYPE_ARG)
7634 template_type_arg = true, decl_context = TYPENAME;
7636 if (initialized > 1)
7637 funcdef_flag = true;
7639 /* Look inside a declarator for the name being declared
7640 and get it as a string, for an error message. */
7641 for (id_declarator = declarator;
7643 id_declarator = id_declarator->declarator)
7645 if (id_declarator->kind != cdk_id)
7646 innermost_code = id_declarator->kind;
7648 switch (id_declarator->kind)
7651 if (id_declarator->declarator
7652 && id_declarator->declarator->kind == cdk_id)
7654 sfk = id_declarator->declarator->u.id.sfk;
7655 if (sfk == sfk_destructor)
7662 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7663 tree decl = id_declarator->u.id.unqualified_name;
7666 if (qualifying_scope)
7668 if (at_function_scope_p ())
7672 A declarator-id shall not be qualified except
7675 None of the cases are permitted in block
7677 if (qualifying_scope == global_namespace)
7678 error ("invalid use of qualified-name %<::%D%>",
7680 else if (TYPE_P (qualifying_scope))
7681 error ("invalid use of qualified-name %<%T::%D%>",
7682 qualifying_scope, decl);
7684 error ("invalid use of qualified-name %<%D::%D%>",
7685 qualifying_scope, decl);
7686 return error_mark_node;
7688 else if (TYPE_P (qualifying_scope))
7690 ctype = qualifying_scope;
7691 if (innermost_code != cdk_function
7692 && current_class_type
7693 && !UNIQUELY_DERIVED_FROM_P (ctype,
7694 current_class_type))
7696 error ("type %qT is not derived from type %qT",
7697 ctype, current_class_type);
7698 return error_mark_node;
7701 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7702 in_namespace = qualifying_scope;
7704 switch (TREE_CODE (decl))
7710 if (innermost_code != cdk_function)
7712 error ("declaration of %qD as non-function", decl);
7713 return error_mark_node;
7715 else if (!qualifying_scope
7716 && !(current_class_type && at_class_scope_p ()))
7718 error ("declaration of %qD as non-member", decl);
7719 return error_mark_node;
7722 type = TREE_OPERAND (decl, 0);
7724 type = constructor_name (type);
7725 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7730 case TEMPLATE_ID_EXPR:
7732 tree fns = TREE_OPERAND (decl, 0);
7735 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7737 gcc_assert (is_overloaded_fn (dname));
7738 dname = DECL_NAME (get_first_fn (dname));
7743 case IDENTIFIER_NODE:
7744 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7747 if (C_IS_RESERVED_WORD (dname))
7749 error ("declarator-id missing; using reserved word %qD",
7751 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7753 else if (!IDENTIFIER_TYPENAME_P (dname))
7754 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7757 gcc_assert (flags == NO_SPECIAL);
7758 flags = TYPENAME_FLAG;
7759 ctor_return_type = TREE_TYPE (dname);
7760 sfk = sfk_conversion;
7761 if (is_typename_at_global_scope (dname))
7762 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7764 name = "<invalid operator>";
7781 return error_mark_node;
7786 if (id_declarator->kind == cdk_id)
7792 The declarator in a function-definition shall have the form
7793 D1 ( parameter-declaration-clause) ... */
7794 if (funcdef_flag && innermost_code != cdk_function)
7796 error ("function definition does not declare parameters");
7797 return error_mark_node;
7800 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7801 && innermost_code != cdk_function
7802 && ! (ctype && !declspecs->any_specifiers_p))
7804 error ("declaration of %qD as non-function", dname);
7805 return error_mark_node;
7808 /* Anything declared one level down from the top level
7809 must be one of the parameters of a function
7810 (because the body is at least two levels down). */
7812 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7813 by not allowing C++ class definitions to specify their parameters
7814 with xdecls (must be spec.d in the parmlist).
7816 Since we now wait to push a class scope until we are sure that
7817 we are in a legitimate method context, we must set oldcname
7818 explicitly (since current_class_name is not yet alive).
7820 We also want to avoid calling this a PARM if it is in a namespace. */
7822 if (decl_context == NORMAL && !toplevel_bindings_p ())
7824 struct cp_binding_level *b = current_binding_level;
7825 current_binding_level = b->level_chain;
7826 if (current_binding_level != 0 && toplevel_bindings_p ())
7827 decl_context = PARM;
7828 current_binding_level = b;
7832 name = decl_context == PARM ? "parameter" : "type name";
7834 /* If there were multiple types specified in the decl-specifier-seq,
7835 issue an error message. */
7836 if (declspecs->multiple_types_p)
7838 error ("two or more data types in declaration of %qs", name);
7839 return error_mark_node;
7842 if (declspecs->conflicting_specifiers_p)
7844 error ("conflicting specifiers in declaration of %qs", name);
7845 return error_mark_node;
7848 /* Extract the basic type from the decl-specifier-seq. */
7849 type = declspecs->type;
7850 if (type == error_mark_node)
7853 type_was_error_mark_node = true;
7855 /* If the entire declaration is itself tagged as deprecated then
7856 suppress reports of deprecated items. */
7857 if (type && TREE_DEPRECATED (type)
7858 && deprecated_state != DEPRECATED_SUPPRESS)
7859 warn_deprecated_use (type, NULL_TREE);
7860 if (type && TREE_CODE (type) == TYPE_DECL)
7862 typedef_decl = type;
7863 type = TREE_TYPE (typedef_decl);
7864 if (TREE_DEPRECATED (type)
7865 && DECL_ARTIFICIAL (typedef_decl)
7866 && deprecated_state != DEPRECATED_SUPPRESS)
7867 warn_deprecated_use (type, NULL_TREE);
7869 /* No type at all: default to `int', and set DEFAULTED_INT
7870 because it was not a user-defined typedef. */
7871 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7873 /* These imply 'int'. */
7874 type = integer_type_node;
7878 explicit_int = declspecs->explicit_int_p;
7879 explicit_char = declspecs->explicit_char_p;
7882 /* See the code below that used this. */
7884 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7886 typedef_type = type;
7889 if (sfk != sfk_conversion)
7890 ctor_return_type = ctype;
7892 if (sfk != sfk_none)
7893 type = check_special_function_return_type (sfk, type,
7895 else if (type == NULL_TREE)
7901 /* We handle `main' specially here, because 'main () { }' is so
7902 common. With no options, it is allowed. With -Wreturn-type,
7903 it is a warning. It is only an error with -pedantic-errors. */
7904 is_main = (funcdef_flag
7905 && dname && MAIN_NAME_P (dname)
7906 && ctype == NULL_TREE
7907 && in_namespace == NULL_TREE
7908 && current_namespace == global_namespace);
7910 if (type_was_error_mark_node)
7911 /* We've already issued an error, don't complain more. */;
7912 else if (in_system_header || flag_ms_extensions)
7913 /* Allow it, sigh. */;
7915 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7917 pedwarn (input_location, OPT_pedantic,
7918 "ISO C++ forbids declaration of %qs with no type", name);
7920 warning (OPT_Wreturn_type,
7921 "ISO C++ forbids declaration of %qs with no type", name);
7923 type = integer_type_node;
7928 /* Now process the modifiers that were specified
7929 and check for invalid combinations. */
7931 /* Long double is a special combination. */
7932 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7935 type = build_qualified_type (long_double_type_node,
7936 cp_type_quals (type));
7939 /* Check all other uses of type modifiers. */
7941 if (unsigned_p || signed_p || long_p || short_p)
7945 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7946 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7947 else if (signed_p && unsigned_p)
7948 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7949 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7950 error ("%<long long%> invalid for %qs", name);
7951 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7952 error ("%<long%> invalid for %qs", name);
7953 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7954 error ("%<short%> invalid for %qs", name);
7955 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7956 error ("%<long%> or %<short%> invalid for %qs", name);
7957 else if ((long_p || short_p) && explicit_char)
7958 error ("%<long%> or %<short%> specified with char for %qs", name);
7959 else if (long_p && short_p)
7960 error ("%<long%> and %<short%> specified together for %qs", name);
7961 else if (type == char16_type_node || type == char32_type_node)
7963 if (signed_p || unsigned_p)
7964 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7965 else if (short_p || long_p)
7966 error ("%<short%> or %<long%> invalid for %qs", name);
7971 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7973 pedwarn (input_location, OPT_pedantic,
7974 "long, short, signed or unsigned used invalidly for %qs",
7976 if (flag_pedantic_errors)
7981 /* Discard the type modifiers if they are invalid. */
7992 /* Decide whether an integer type is signed or not.
7993 Optionally treat bitfields as signed by default. */
7997 It is implementation-defined whether a plain (neither
7998 explicitly signed or unsigned) char, short, int, or long
7999 bit-field is signed or unsigned.
8001 Naturally, we extend this to long long as well. Note that
8002 this does not include wchar_t. */
8003 || (bitfield && !flag_signed_bitfields
8005 /* A typedef for plain `int' without `signed' can be
8006 controlled just like plain `int', but a typedef for
8007 `signed int' cannot be so controlled. */
8009 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8010 && TREE_CODE (type) == INTEGER_TYPE
8011 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8014 type = long_long_unsigned_type_node;
8016 type = long_unsigned_type_node;
8018 type = short_unsigned_type_node;
8019 else if (type == char_type_node)
8020 type = unsigned_char_type_node;
8021 else if (typedef_decl)
8022 type = unsigned_type_for (type);
8024 type = unsigned_type_node;
8026 else if (signed_p && type == char_type_node)
8027 type = signed_char_type_node;
8029 type = long_long_integer_type_node;
8031 type = long_integer_type_node;
8033 type = short_integer_type_node;
8035 if (declspecs->specs[(int)ds_complex])
8037 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8038 error ("complex invalid for %qs", name);
8039 /* If we just have "complex", it is equivalent to
8040 "complex double", but if any modifiers at all are specified it is
8041 the complex form of TYPE. E.g, "complex short" is
8042 "complex short int". */
8044 else if (defaulted_int && ! longlong
8045 && ! (long_p || short_p || signed_p || unsigned_p))
8046 type = complex_double_type_node;
8047 else if (type == integer_type_node)
8048 type = complex_integer_type_node;
8049 else if (type == float_type_node)
8050 type = complex_float_type_node;
8051 else if (type == double_type_node)
8052 type = complex_double_type_node;
8053 else if (type == long_double_type_node)
8054 type = complex_long_double_type_node;
8056 type = build_complex_type (type);
8059 type_quals = TYPE_UNQUALIFIED;
8060 if (declspecs->specs[(int)ds_const])
8061 type_quals |= TYPE_QUAL_CONST;
8062 if (declspecs->specs[(int)ds_volatile])
8063 type_quals |= TYPE_QUAL_VOLATILE;
8064 if (declspecs->specs[(int)ds_restrict])
8065 type_quals |= TYPE_QUAL_RESTRICT;
8066 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8067 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8070 if (TREE_CODE (type) == FUNCTION_TYPE
8071 && type_quals != TYPE_UNQUALIFIED)
8073 /* This was an error in C++98 (cv-qualifiers cannot be added to
8074 a function type), but DR 295 makes the code well-formed by
8075 dropping the extra qualifiers. */
8078 tree bad_type = build_qualified_type (type, type_quals);
8079 pedwarn (input_location, OPT_pedantic,
8080 "ignoring %qV qualifiers added to function type %qT",
8083 type_quals = TYPE_UNQUALIFIED;
8085 type_quals |= cp_type_quals (type);
8086 type = cp_build_qualified_type_real
8087 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8088 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8089 /* We might have ignored or rejected some of the qualifiers. */
8090 type_quals = cp_type_quals (type);
8093 inlinep = !! declspecs->specs[(int)ds_inline];
8094 virtualp = !! declspecs->specs[(int)ds_virtual];
8095 explicitp = !! declspecs->specs[(int)ds_explicit];
8097 storage_class = declspecs->storage_class;
8098 if (storage_class == sc_static)
8099 staticp = 1 + (decl_context == FIELD);
8101 if (virtualp && staticp == 2)
8103 error ("member %qD cannot be declared both virtual and static", dname);
8104 storage_class = sc_none;
8107 friendp = !! declspecs->specs[(int)ds_friend];
8109 if (dependent_name && !friendp)
8111 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8112 return error_mark_node;
8115 /* Issue errors about use of storage classes for parameters. */
8116 if (decl_context == PARM)
8118 if (declspecs->specs[(int)ds_typedef])
8120 error ("typedef declaration invalid in parameter declaration");
8121 return error_mark_node;
8123 else if (storage_class == sc_static
8124 || storage_class == sc_extern
8126 error ("storage class specifiers invalid in parameter declarations");
8128 if (type_uses_auto (type))
8130 error ("parameter declared %<auto%>");
8131 type = error_mark_node;
8135 /* Give error if `virtual' is used outside of class declaration. */
8137 && (current_class_name == NULL_TREE || decl_context != FIELD))
8139 error ("%<virtual%> outside class declaration");
8143 /* Static anonymous unions are dealt with here. */
8144 if (staticp && decl_context == TYPENAME
8146 && ANON_AGGR_TYPE_P (declspecs->type))
8147 decl_context = FIELD;
8149 /* Warn about storage classes that are invalid for certain
8150 kinds of declarations (parameters, typenames, etc.). */
8153 && storage_class != sc_extern
8154 && storage_class != sc_static)
8155 || declspecs->specs[(int)ds_typedef]))
8157 error ("multiple storage classes in declaration of %qs", name);
8160 if (decl_context != NORMAL
8161 && ((storage_class != sc_none
8162 && storage_class != sc_mutable)
8165 if ((decl_context == PARM || decl_context == CATCHPARM)
8166 && (storage_class == sc_register
8167 || storage_class == sc_auto))
8169 else if (declspecs->specs[(int)ds_typedef])
8171 else if (decl_context == FIELD
8172 /* C++ allows static class elements. */
8173 && storage_class == sc_static)
8174 /* C++ also allows inlines and signed and unsigned elements,
8175 but in those cases we don't come in here. */
8179 if (decl_context == FIELD)
8180 error ("storage class specified for %qs", name);
8183 if (decl_context == PARM || decl_context == CATCHPARM)
8184 error ("storage class specified for parameter %qs", name);
8186 error ("storage class specified for typename");
8188 if (storage_class == sc_register
8189 || storage_class == sc_auto
8190 || storage_class == sc_extern
8192 storage_class = sc_none;
8195 else if (storage_class == sc_extern && funcdef_flag
8196 && ! toplevel_bindings_p ())
8197 error ("nested function %qs declared %<extern%>", name);
8198 else if (toplevel_bindings_p ())
8200 if (storage_class == sc_auto)
8201 error ("top-level declaration of %qs specifies %<auto%>", name);
8204 && storage_class != sc_extern
8205 && storage_class != sc_static)
8207 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8212 if (storage_class && friendp)
8214 error ("storage class specifiers invalid in friend function declarations");
8215 storage_class = sc_none;
8220 unqualified_id = NULL_TREE;
8223 unqualified_id = id_declarator->u.id.unqualified_name;
8224 switch (TREE_CODE (unqualified_id))
8227 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8228 if (TYPE_P (unqualified_id))
8229 unqualified_id = constructor_name (unqualified_id);
8232 case IDENTIFIER_NODE:
8233 case TEMPLATE_ID_EXPR:
8241 /* Determine the type of the entity declared by recurring on the
8243 for (; declarator; declarator = declarator->declarator)
8245 const cp_declarator *inner_declarator;
8248 if (type == error_mark_node)
8249 return error_mark_node;
8251 attrs = declarator->attributes;
8257 if (declarator == NULL || declarator->kind == cdk_id)
8258 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8259 if (declarator->kind == cdk_function)
8260 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8261 if (declarator->kind == cdk_array)
8262 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8263 returned_attrs = decl_attributes (&type,
8264 chainon (returned_attrs, attrs),
8268 if (declarator->kind == cdk_id)
8271 inner_declarator = declarator->declarator;
8273 switch (declarator->kind)
8276 type = create_array_type_for_decl (dname, type,
8277 declarator->u.array.bounds);
8285 /* Declaring a function type.
8286 Make sure we have a valid type for the function to return. */
8288 if (type_quals != TYPE_UNQUALIFIED)
8290 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8291 warning (OPT_Wignored_qualifiers,
8292 "type qualifiers ignored on function return type");
8293 /* We now know that the TYPE_QUALS don't apply to the
8294 decl, but to its return type. */
8295 type_quals = TYPE_UNQUALIFIED;
8296 set_no_warning = true;
8298 errmsg = targetm.invalid_return_type (type);
8302 type = integer_type_node;
8305 /* Error about some types functions can't return. */
8307 if (TREE_CODE (type) == FUNCTION_TYPE)
8309 error ("%qs declared as function returning a function", name);
8310 return error_mark_node;
8312 if (TREE_CODE (type) == ARRAY_TYPE)
8314 error ("%qs declared as function returning an array", name);
8315 return error_mark_node;
8318 /* Pick up type qualifiers which should be applied to `this'. */
8319 memfn_quals = declarator->u.function.qualifiers;
8321 /* Pick up the exception specifications. */
8322 raises = declarator->u.function.exception_specification;
8324 /* Say it's a definition only for the CALL_EXPR
8325 closest to the identifier. */
8326 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8328 /* Handle a late-specified return type. */
8331 if (type_uses_auto (type))
8333 if (!declarator->u.function.late_return_type)
8335 error ("%qs function uses %<auto%> type specifier without"
8336 " late return type", name);
8337 return error_mark_node;
8339 else if (!is_auto (type))
8341 error ("%qs function with late return type has"
8342 " %qT as its type rather than plain %<auto%>",
8344 return error_mark_node;
8347 else if (declarator->u.function.late_return_type)
8349 error ("%qs function with late return type not declared"
8350 " with %<auto%> type specifier", name);
8351 return error_mark_node;
8354 type = splice_late_return_type
8355 (type, declarator->u.function.late_return_type);
8356 if (type == error_mark_node)
8357 return error_mark_node;
8359 if (ctype == NULL_TREE
8360 && decl_context == FIELD
8362 && (friendp == 0 || dname == current_class_name))
8363 ctype = current_class_type;
8365 if (ctype && (sfk == sfk_constructor
8366 || sfk == sfk_destructor))
8368 /* We are within a class's scope. If our declarator name
8369 is the same as the class name, and we are defining
8370 a function, then it is a constructor/destructor, and
8371 therefore returns a void type. */
8373 /* ISO C++ 12.4/2. A destructor may not be declared
8374 const or volatile. A destructor may not be
8377 ISO C++ 12.1. A constructor may not be declared
8378 const or volatile. A constructor may not be
8379 virtual. A constructor may not be static. */
8381 error ((flags == DTOR_FLAG)
8382 ? "destructor cannot be static member function"
8383 : "constructor cannot be static member function");
8386 error ((flags == DTOR_FLAG)
8387 ? "destructors may not be cv-qualified"
8388 : "constructors may not be cv-qualified");
8389 memfn_quals = TYPE_UNQUALIFIED;
8392 if (decl_context == FIELD
8393 && !member_function_or_else (ctype,
8396 return error_mark_node;
8398 if (flags != DTOR_FLAG)
8400 /* It's a constructor. */
8405 permerror (input_location, "constructors cannot be declared virtual");
8408 if (decl_context == FIELD
8409 && sfk != sfk_constructor)
8410 return error_mark_node;
8412 if (decl_context == FIELD)
8418 error ("can't initialize friend function %qs", name);
8421 /* Cannot be both friend and virtual. */
8422 error ("virtual functions cannot be friends");
8425 if (decl_context == NORMAL)
8426 error ("friend declaration not in class definition");
8427 if (current_function_decl && funcdef_flag)
8428 error ("can't define friend function %qs in a local "
8432 else if (ctype && sfk == sfk_conversion)
8436 maybe_warn_cpp0x ("explicit conversion operators");
8441 arg_types = grokparms (declarator->u.function.parameters,
8444 if (inner_declarator
8445 && inner_declarator->kind == cdk_id
8446 && inner_declarator->u.id.sfk == sfk_destructor
8447 && arg_types != void_list_node)
8449 error ("destructors may not have parameters");
8450 arg_types = void_list_node;
8454 type = build_function_type (type, arg_types);
8461 /* Filter out pointers-to-references and references-to-references.
8462 We can get these if a TYPE_DECL is used. */
8464 if (TREE_CODE (type) == REFERENCE_TYPE)
8466 if (declarator->kind != cdk_reference)
8468 error ("cannot declare pointer to %q#T", type);
8469 type = TREE_TYPE (type);
8472 /* In C++0x, we allow reference to reference declarations
8473 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8474 and template type arguments [14.3.1/4 temp.arg.type]. The
8475 check for direct reference to reference declarations, which
8476 are still forbidden, occurs below. Reasoning behind the change
8477 can be found in DR106, DR540, and the rvalue reference
8479 else if (cxx_dialect == cxx98)
8481 error ("cannot declare reference to %q#T", type);
8482 type = TREE_TYPE (type);
8485 else if (VOID_TYPE_P (type))
8487 if (declarator->kind == cdk_reference)
8488 error ("cannot declare reference to %q#T", type);
8489 else if (declarator->kind == cdk_ptrmem)
8490 error ("cannot declare pointer to %q#T member", type);
8493 /* We now know that the TYPE_QUALS don't apply to the decl,
8494 but to the target of the pointer. */
8495 type_quals = TYPE_UNQUALIFIED;
8497 if (declarator->kind == cdk_ptrmem
8498 && (TREE_CODE (type) == FUNCTION_TYPE
8499 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8501 memfn_quals |= cp_type_quals (type);
8502 type = build_memfn_type (type,
8503 declarator->u.pointer.class_type,
8505 memfn_quals = TYPE_UNQUALIFIED;
8508 if (TREE_CODE (type) == FUNCTION_TYPE
8509 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8510 error ("cannot declare %s to qualified function type %qT",
8511 declarator->kind == cdk_reference ? "reference" : "pointer",
8514 if (declarator->kind == cdk_reference)
8516 /* In C++0x, the type we are creating a reference to might be
8517 a typedef which is itself a reference type. In that case,
8518 we follow the reference collapsing rules in
8519 [7.1.3/8 dcl.typedef] to create the final reference type:
8521 "If a typedef TD names a type that is a reference to a type
8522 T, an attempt to create the type 'lvalue reference to cv TD'
8523 creates the type 'lvalue reference to T,' while an attempt
8524 to create the type "rvalue reference to cv TD' creates the
8527 if (!VOID_TYPE_P (type))
8528 type = cp_build_reference_type
8529 ((TREE_CODE (type) == REFERENCE_TYPE
8530 ? TREE_TYPE (type) : type),
8531 (declarator->u.reference.rvalue_ref
8532 && (TREE_CODE(type) != REFERENCE_TYPE
8533 || TYPE_REF_IS_RVALUE (type))));
8535 /* In C++0x, we need this check for direct reference to
8536 reference declarations, which are forbidden by
8537 [8.3.2/5 dcl.ref]. Reference to reference declarations
8538 are only allowed indirectly through typedefs and template
8539 type arguments. Example:
8541 void foo(int & &); // invalid ref-to-ref decl
8543 typedef int & int_ref;
8544 void foo(int_ref &); // valid ref-to-ref decl
8546 if (inner_declarator && inner_declarator->kind == cdk_reference)
8547 error ("cannot declare reference to %q#T, which is not "
8548 "a typedef or a template type argument", type);
8550 else if (TREE_CODE (type) == METHOD_TYPE)
8551 type = build_ptrmemfunc_type (build_pointer_type (type));
8552 else if (declarator->kind == cdk_ptrmem)
8554 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8556 if (declarator->u.pointer.class_type == error_mark_node)
8557 /* We will already have complained. */
8558 type = error_mark_node;
8560 type = build_ptrmem_type (declarator->u.pointer.class_type,
8564 type = build_pointer_type (type);
8566 /* Process a list of type modifier keywords (such as
8567 const or volatile) that were given inside the `*' or `&'. */
8569 if (declarator->u.pointer.qualifiers)
8572 = cp_build_qualified_type (type,
8573 declarator->u.pointer.qualifiers);
8574 type_quals = cp_type_quals (type);
8587 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8588 && TREE_CODE (type) != FUNCTION_TYPE
8589 && TREE_CODE (type) != METHOD_TYPE)
8591 error ("template-id %qD used as a declarator",
8593 unqualified_id = dname;
8596 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8597 qualified with a class-name, turn it into a METHOD_TYPE, unless
8598 we know that the function is static. We take advantage of this
8599 opportunity to do other processing that pertains to entities
8600 explicitly declared to be class members. Note that if DECLARATOR
8601 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8602 would not have exited the loop above. */
8604 && declarator->u.id.qualifying_scope
8605 && TYPE_P (declarator->u.id.qualifying_scope))
8609 ctype = declarator->u.id.qualifying_scope;
8610 ctype = TYPE_MAIN_VARIANT (ctype);
8612 while (t != NULL_TREE && CLASS_TYPE_P (t))
8614 /* You're supposed to have one `template <...>' for every
8615 template class, but you don't need one for a full
8616 specialization. For example:
8618 template <class T> struct S{};
8619 template <> struct S<int> { void f(); };
8620 void S<int>::f () {}
8622 is correct; there shouldn't be a `template <>' for the
8623 definition of `S<int>::f'. */
8624 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8625 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8626 /* T is an explicit (not partial) specialization. All
8627 containing classes must therefore also be explicitly
8630 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8631 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8632 template_count += 1;
8634 t = TYPE_MAIN_DECL (t);
8635 t = DECL_CONTEXT (t);
8638 if (ctype == current_class_type)
8642 permerror (input_location, "member functions are implicitly friends of their class");
8646 permerror (declarator->id_loc,
8647 "extra qualification %<%T::%> on member %qs",
8650 else if (/* If the qualifying type is already complete, then we
8651 can skip the following checks. */
8652 !COMPLETE_TYPE_P (ctype)
8653 && (/* If the function is being defined, then
8654 qualifying type must certainly be complete. */
8656 /* A friend declaration of "T::f" is OK, even if
8657 "T" is a template parameter. But, if this
8658 function is not a friend, the qualifying type
8660 || (!friendp && !CLASS_TYPE_P (ctype))
8661 /* For a declaration, the type need not be
8662 complete, if either it is dependent (since there
8663 is no meaningful definition of complete in that
8664 case) or the qualifying class is currently being
8666 || !(dependent_type_p (ctype)
8667 || currently_open_class (ctype)))
8668 /* Check that the qualifying type is complete. */
8669 && !complete_type_or_else (ctype, NULL_TREE))
8670 return error_mark_node;
8671 else if (TREE_CODE (type) == FUNCTION_TYPE)
8673 tree sname = declarator->u.id.unqualified_name;
8675 if (current_class_type
8676 && (!friendp || funcdef_flag))
8679 ? "cannot define member function %<%T::%s%> within %<%T%>"
8680 : "cannot declare member function %<%T::%s%> within %<%T%>",
8681 ctype, name, current_class_type);
8682 return error_mark_node;
8685 if (TREE_CODE (sname) == IDENTIFIER_NODE
8686 && NEW_DELETE_OPNAME_P (sname))
8687 /* Overloaded operator new and operator delete
8688 are always static functions. */
8691 type = build_memfn_type (type, ctype, memfn_quals);
8693 else if (declspecs->specs[(int)ds_typedef]
8694 && current_class_type)
8696 error ("cannot declare member %<%T::%s%> within %qT",
8697 ctype, name, current_class_type);
8698 return error_mark_node;
8702 /* Now TYPE has the actual type. */
8707 *attrlist = chainon (returned_attrs, *attrlist);
8709 attrlist = &returned_attrs;
8712 /* Handle parameter packs. */
8713 if (parameter_pack_p)
8715 if (decl_context == PARM)
8716 /* Turn the type into a pack expansion.*/
8717 type = make_pack_expansion (type);
8719 error ("non-parameter %qs cannot be a parameter pack", name);
8722 /* Did array size calculations overflow? */
8724 if (TREE_CODE (type) == ARRAY_TYPE
8725 && COMPLETE_TYPE_P (type)
8726 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8727 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8729 error ("size of array %qs is too large", name);
8730 /* If we proceed with the array type as it is, we'll eventually
8731 crash in tree_low_cst(). */
8732 type = error_mark_node;
8735 if ((decl_context == FIELD || decl_context == PARM)
8736 && !processing_template_decl
8737 && variably_modified_type_p (type, NULL_TREE))
8739 if (decl_context == FIELD)
8740 error ("data member may not have variably modified type %qT", type);
8742 error ("parameter may not have variably modified type %qT", type);
8743 type = error_mark_node;
8746 if (explicitp == 1 || (explicitp && friendp))
8748 /* [dcl.fct.spec] The explicit specifier shall only be used in
8749 declarations of constructors within a class definition. */
8750 error ("only declarations of constructors can be %<explicit%>");
8754 if (storage_class == sc_mutable)
8756 if (decl_context != FIELD || friendp)
8758 error ("non-member %qs cannot be declared %<mutable%>", name);
8759 storage_class = sc_none;
8761 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8763 error ("non-object member %qs cannot be declared %<mutable%>", name);
8764 storage_class = sc_none;
8766 else if (TREE_CODE (type) == FUNCTION_TYPE
8767 || TREE_CODE (type) == METHOD_TYPE)
8769 error ("function %qs cannot be declared %<mutable%>", name);
8770 storage_class = sc_none;
8774 error ("static %qs cannot be declared %<mutable%>", name);
8775 storage_class = sc_none;
8777 else if (type_quals & TYPE_QUAL_CONST)
8779 error ("const %qs cannot be declared %<mutable%>", name);
8780 storage_class = sc_none;
8784 /* If this is declaring a typedef name, return a TYPE_DECL. */
8785 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8789 /* Note that the grammar rejects storage classes
8790 in typenames, fields or parameters. */
8791 if (current_lang_name == lang_name_java)
8792 TYPE_FOR_JAVA (type) = 1;
8794 /* This declaration:
8796 typedef void f(int) const;
8798 declares a function type which is not a member of any
8799 particular class, but which is cv-qualified; for
8800 example "f S::*" declares a pointer to a const-qualified
8801 member function of S. We record the cv-qualification in the
8803 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8805 type = cp_build_qualified_type (type, memfn_quals);
8807 /* We have now dealt with these qualifiers. */
8808 memfn_quals = TYPE_UNQUALIFIED;
8811 if (decl_context == FIELD)
8812 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8814 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8815 if (id_declarator && declarator->u.id.qualifying_scope) {
8816 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8817 TREE_TYPE (decl) = error_mark_node;
8820 if (decl_context != FIELD)
8822 if (!current_function_decl)
8823 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8824 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8825 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8826 (current_function_decl)))
8827 /* The TYPE_DECL is "abstract" because there will be
8828 clones of this constructor/destructor, and there will
8829 be copies of this TYPE_DECL generated in those
8831 DECL_ABSTRACT (decl) = 1;
8833 else if (constructor_name_p (unqualified_id, current_class_type))
8834 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8835 "as enclosing class",
8838 /* If the user declares "typedef struct {...} foo" then the
8839 struct will have an anonymous name. Fill that name in now.
8840 Nothing can refer to it, so nothing needs know about the name
8842 if (type != error_mark_node
8845 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8846 && TYPE_ANONYMOUS_P (type)
8847 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8851 /* Replace the anonymous name with the real name everywhere. */
8852 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8854 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8856 debug_hooks->set_name (t, decl);
8857 TYPE_NAME (t) = decl;
8861 if (TYPE_LANG_SPECIFIC (type))
8862 TYPE_WAS_ANONYMOUS (type) = 1;
8864 /* If this is a typedef within a template class, the nested
8865 type is a (non-primary) template. The name for the
8866 template needs updating as well. */
8867 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8868 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8869 = TYPE_IDENTIFIER (type);
8871 /* FIXME remangle member functions; member functions of a
8872 type with external linkage have external linkage. */
8876 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8877 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8879 bad_specifiers (decl, "type", virtualp,
8880 memfn_quals != TYPE_UNQUALIFIED,
8881 inlinep, friendp, raises != NULL_TREE);
8886 /* Detect the case of an array type of unspecified size
8887 which came, as such, direct from a typedef name.
8888 We must copy the type, so that the array's domain can be
8889 individually set by the object's initializer. */
8891 if (type && typedef_type
8892 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8893 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8894 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8896 /* Detect where we're using a typedef of function type to declare a
8897 function. PARMS will not be set, so we must create it now. */
8899 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8901 tree decls = NULL_TREE;
8904 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8906 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8908 TREE_CHAIN (decl) = decls;
8912 parms = nreverse (decls);
8914 if (decl_context != TYPENAME)
8916 /* A cv-qualifier-seq shall only be part of the function type
8917 for a non-static member function. [8.3.5/4 dcl.fct] */
8918 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8919 && (current_class_type == NULL_TREE || staticp) )
8922 ? G_("qualified function types cannot be used to "
8923 "declare static member functions")
8924 : G_("qualified function types cannot be used to "
8925 "declare free functions"));
8926 type = TYPE_MAIN_VARIANT (type);
8929 /* The qualifiers on the function type become the qualifiers on
8930 the non-static member function. */
8931 memfn_quals |= cp_type_quals (type);
8935 /* If this is a type name (such as, in a cast or sizeof),
8936 compute the type and return it now. */
8938 if (decl_context == TYPENAME)
8940 /* Note that the grammar rejects storage classes
8941 in typenames, fields or parameters. */
8942 if (type_quals != TYPE_UNQUALIFIED)
8943 type_quals = TYPE_UNQUALIFIED;
8945 /* Special case: "friend class foo" looks like a TYPENAME context. */
8948 if (type_quals != TYPE_UNQUALIFIED)
8950 error ("type qualifiers specified for friend class declaration");
8951 type_quals = TYPE_UNQUALIFIED;
8955 error ("%<inline%> specified for friend class declaration");
8961 /* Don't allow friend declaration without a class-key. */
8962 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8963 permerror (input_location, "template parameters cannot be friends");
8964 else if (TREE_CODE (type) == TYPENAME_TYPE)
8965 permerror (input_location, "friend declaration requires class-key, "
8966 "i.e. %<friend class %T::%D%>",
8967 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8969 permerror (input_location, "friend declaration requires class-key, "
8970 "i.e. %<friend %#T%>",
8974 /* Only try to do this stuff if we didn't already give up. */
8975 if (type != integer_type_node)
8977 /* A friendly class? */
8978 if (current_class_type)
8979 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8982 error ("trying to make class %qT a friend of global scope",
8985 type = void_type_node;
8988 else if (memfn_quals)
8990 if (ctype == NULL_TREE
8991 && TREE_CODE (type) == METHOD_TYPE)
8992 ctype = TYPE_METHOD_BASETYPE (type);
8995 type = build_memfn_type (type, ctype, memfn_quals);
8996 /* Core issue #547: need to allow this in template type args. */
8997 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8998 type = cp_build_qualified_type (type, memfn_quals);
9000 error ("invalid qualifiers on non-member function type");
9005 else if (unqualified_id == NULL_TREE && decl_context != PARM
9006 && decl_context != CATCHPARM
9007 && TREE_CODE (type) != UNION_TYPE
9010 error ("abstract declarator %qT used as declaration", type);
9011 return error_mark_node;
9014 /* Only functions may be declared using an operator-function-id. */
9016 && IDENTIFIER_OPNAME_P (unqualified_id)
9017 && TREE_CODE (type) != FUNCTION_TYPE
9018 && TREE_CODE (type) != METHOD_TYPE)
9020 error ("declaration of %qD as non-function", unqualified_id);
9021 return error_mark_node;
9024 /* We don't check parameter types here because we can emit a better
9025 error message later. */
9026 if (decl_context != PARM)
9028 type = check_var_type (unqualified_id, type);
9029 if (type == error_mark_node)
9030 return error_mark_node;
9033 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9034 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9036 if (decl_context == PARM || decl_context == CATCHPARM)
9038 if (ctype || in_namespace)
9039 error ("cannot use %<::%> in parameter declaration");
9041 /* A parameter declared as an array of T is really a pointer to T.
9042 One declared as a function is really a pointer to a function.
9043 One declared as a member is really a pointer to member. */
9045 if (TREE_CODE (type) == ARRAY_TYPE)
9047 /* Transfer const-ness of array into that of type pointed to. */
9048 type = build_pointer_type (TREE_TYPE (type));
9049 type_quals = TYPE_UNQUALIFIED;
9051 else if (TREE_CODE (type) == FUNCTION_TYPE)
9052 type = build_pointer_type (type);
9058 if (decl_context == PARM)
9060 decl = cp_build_parm_decl (unqualified_id, type);
9062 bad_specifiers (decl, "parameter", virtualp,
9063 memfn_quals != TYPE_UNQUALIFIED,
9064 inlinep, friendp, raises != NULL_TREE);
9066 else if (decl_context == FIELD)
9068 /* The C99 flexible array extension. */
9069 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9070 && TYPE_DOMAIN (type) == NULL_TREE)
9072 tree itype = compute_array_index_type (dname, integer_zero_node);
9073 type = build_cplus_array_type (TREE_TYPE (type), itype);
9076 if (type == error_mark_node)
9078 /* Happens when declaring arrays of sizes which
9079 are error_mark_node, for example. */
9082 else if (in_namespace && !friendp)
9084 /* Something like struct S { int N::j; }; */
9085 error ("invalid use of %<::%>");
9086 return error_mark_node;
9088 else if (TREE_CODE (type) == FUNCTION_TYPE)
9091 tree function_context;
9095 if (ctype == NULL_TREE)
9096 ctype = current_class_type;
9098 if (ctype == NULL_TREE)
9100 error ("can't make %qD into a method -- not in a class",
9102 return error_mark_node;
9105 /* ``A union may [ ... ] not [ have ] virtual functions.''
9107 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9109 error ("function %qD declared virtual inside a union",
9111 return error_mark_node;
9114 if (NEW_DELETE_OPNAME_P (unqualified_id))
9118 error ("%qD cannot be declared virtual, since it "
9124 else if (staticp < 2)
9125 type = build_memfn_type (type, ctype, memfn_quals);
9128 /* Check that the name used for a destructor makes sense. */
9129 if (sfk == sfk_destructor)
9131 tree uqname = id_declarator->u.id.unqualified_name;
9135 gcc_assert (friendp);
9136 error ("expected qualified name in friend declaration "
9137 "for destructor %qD", uqname);
9138 return error_mark_node;
9141 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9143 error ("declaration of %qD as member of %qT",
9145 return error_mark_node;
9148 else if (sfk == sfk_constructor && friendp)
9150 error ("expected qualified name in friend declaration "
9151 "for constructor %qD",
9152 id_declarator->u.id.unqualified_name);
9153 return error_mark_node;
9156 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9157 function_context = (ctype != NULL_TREE) ?
9158 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9159 publicp = (! friendp || ! staticp)
9160 && function_context == NULL_TREE;
9161 decl = grokfndecl (ctype, type,
9162 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9163 ? unqualified_id : dname,
9166 virtualp, flags, memfn_quals, raises,
9167 friendp ? -1 : 0, friendp, publicp, inlinep,
9169 funcdef_flag, template_count, in_namespace,
9170 attrlist, declarator->id_loc);
9171 if (decl == NULL_TREE)
9172 return error_mark_node;
9174 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9175 /* The decl and setting of decl_attr is also turned off. */
9176 decl = build_decl_attribute_variant (decl, decl_attr);
9179 /* [class.conv.ctor]
9181 A constructor declared without the function-specifier
9182 explicit that can be called with a single parameter
9183 specifies a conversion from the type of its first
9184 parameter to the type of its class. Such a constructor
9185 is called a converting constructor. */
9187 DECL_NONCONVERTING_P (decl) = 1;
9189 else if (TREE_CODE (type) == METHOD_TYPE)
9191 /* We only get here for friend declarations of
9192 members of other classes. */
9193 /* All method decls are public, so tell grokfndecl to set
9194 TREE_PUBLIC, also. */
9195 decl = grokfndecl (ctype, type,
9196 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9197 ? unqualified_id : dname,
9200 virtualp, flags, memfn_quals, raises,
9201 friendp ? -1 : 0, friendp, 1, 0, sfk,
9202 funcdef_flag, template_count, in_namespace,
9204 declarator->id_loc);
9205 if (decl == NULL_TREE)
9206 return error_mark_node;
9208 else if (!staticp && !dependent_type_p (type)
9209 && !COMPLETE_TYPE_P (complete_type (type))
9210 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9213 error ("field %qD has incomplete type", unqualified_id);
9215 error ("name %qT has incomplete type", type);
9217 /* If we're instantiating a template, tell them which
9218 instantiation made the field's type be incomplete. */
9219 if (current_class_type
9220 && TYPE_NAME (current_class_type)
9221 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9223 && declspecs->type == type)
9224 error (" in instantiation of template %qT",
9225 current_class_type);
9227 return error_mark_node;
9233 error ("%qE is neither function nor member function; "
9234 "cannot be declared friend", unqualified_id);
9242 /* Friends are treated specially. */
9243 if (ctype == current_class_type)
9244 ; /* We already issued a permerror. */
9245 else if (decl && DECL_NAME (decl))
9247 if (template_class_depth (current_class_type) == 0)
9249 decl = check_explicit_specialization
9250 (unqualified_id, decl, template_count,
9251 2 * funcdef_flag + 4);
9252 if (decl == error_mark_node)
9253 return error_mark_node;
9256 decl = do_friend (ctype, unqualified_id, decl,
9262 return error_mark_node;
9265 /* Structure field. It may not be a function, except for C++. */
9267 if (decl == NULL_TREE)
9273 /* An attempt is being made to initialize a non-static
9274 member. But, from [class.mem]:
9276 4 A member-declarator can contain a
9277 constant-initializer only if it declares a static
9278 member (_class.static_) of integral or enumeration
9279 type, see _class.static.data_.
9281 This used to be relatively common practice, but
9282 the rest of the compiler does not correctly
9283 handle the initialization unless the member is
9284 static so we make it static below. */
9285 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9287 permerror (input_location, "making %qD static", unqualified_id);
9291 if (uses_template_parms (type))
9292 /* We'll check at instantiation time. */
9294 else if (check_static_variable_definition (unqualified_id,
9296 /* If we just return the declaration, crashes
9297 will sometimes occur. We therefore return
9298 void_type_node, as if this was a friend
9299 declaration, to cause callers to completely
9300 ignore this declaration. */
9301 return error_mark_node;
9306 /* C++ allows static class members. All other work
9307 for this is done by grokfield. */
9308 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9309 set_linkage_for_static_data_member (decl);
9310 /* Even if there is an in-class initialization, DECL
9311 is considered undefined until an out-of-class
9312 definition is provided. */
9313 DECL_EXTERNAL (decl) = 1;
9316 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9320 decl = build_decl (input_location,
9321 FIELD_DECL, unqualified_id, type);
9322 DECL_NONADDRESSABLE_P (decl) = bitfield;
9323 if (bitfield && !unqualified_id)
9324 TREE_NO_WARNING (decl) = 1;
9326 if (storage_class == sc_mutable)
9328 DECL_MUTABLE_P (decl) = 1;
9329 storage_class = sc_none;
9333 bad_specifiers (decl, "field", virtualp,
9334 memfn_quals != TYPE_UNQUALIFIED,
9335 inlinep, friendp, raises != NULL_TREE);
9338 else if (TREE_CODE (type) == FUNCTION_TYPE
9339 || TREE_CODE (type) == METHOD_TYPE)
9344 if (!unqualified_id)
9345 return error_mark_node;
9347 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9348 original_name = dname;
9350 original_name = unqualified_id;
9352 if (storage_class == sc_auto)
9353 error ("storage class %<auto%> invalid for function %qs", name);
9354 else if (storage_class == sc_register)
9355 error ("storage class %<register%> invalid for function %qs", name);
9357 error ("storage class %<__thread%> invalid for function %qs", name);
9359 /* Function declaration not at top level.
9360 Storage classes other than `extern' are not allowed
9361 and `extern' makes no difference. */
9362 if (! toplevel_bindings_p ()
9363 && (storage_class == sc_static
9364 || declspecs->specs[(int)ds_inline])
9367 if (storage_class == sc_static)
9368 pedwarn (input_location, OPT_pedantic,
9369 "%<static%> specified invalid for function %qs "
9370 "declared out of global scope", name);
9372 pedwarn (input_location, OPT_pedantic,
9373 "%<inline%> specifier invalid for function %qs "
9374 "declared out of global scope", name);
9377 if (ctype != NULL_TREE
9378 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9380 error ("%q#T is not a class or a namespace", ctype);
9384 if (ctype == NULL_TREE)
9388 error ("virtual non-class function %qs", name);
9391 else if (sfk == sfk_constructor
9392 || sfk == sfk_destructor)
9395 ? "%qs defined in a non-class scope"
9396 : "%qs declared in a non-class scope", name);
9400 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9401 && !NEW_DELETE_OPNAME_P (original_name))
9402 type = build_method_type_directly (ctype,
9404 TYPE_ARG_TYPES (type));
9406 /* Record presence of `static'. */
9407 publicp = (ctype != NULL_TREE
9408 || storage_class == sc_extern
9409 || storage_class != sc_static);
9411 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9412 virtualp, flags, memfn_quals, raises,
9414 publicp, inlinep, sfk, funcdef_flag,
9415 template_count, in_namespace, attrlist,
9416 declarator->id_loc);
9417 if (decl == NULL_TREE)
9418 return error_mark_node;
9422 int invalid_static = 0;
9424 /* Don't allow a static member function in a class, and forbid
9425 declaring main to be static. */
9426 if (TREE_CODE (type) == METHOD_TYPE)
9428 permerror (input_location, "cannot declare member function %qD to have "
9429 "static linkage", decl);
9432 else if (current_function_decl)
9434 /* FIXME need arm citation */
9435 error ("cannot declare static function inside another function");
9442 storage_class = sc_none;
9448 /* It's a variable. */
9450 /* An uninitialized decl with `extern' is a reference. */
9451 decl = grokvardecl (type, unqualified_id,
9454 (type_quals & TYPE_QUAL_CONST) != 0,
9455 ctype ? ctype : in_namespace);
9456 bad_specifiers (decl, "variable", virtualp,
9457 memfn_quals != TYPE_UNQUALIFIED,
9458 inlinep, friendp, raises != NULL_TREE);
9462 DECL_CONTEXT (decl) = ctype;
9465 permerror (input_location, "%<static%> may not be used when defining "
9466 "(as opposed to declaring) a static data member");
9468 storage_class = sc_none;
9470 if (storage_class == sc_register && TREE_STATIC (decl))
9472 error ("static member %qD declared %<register%>", decl);
9473 storage_class = sc_none;
9475 if (storage_class == sc_extern && pedantic)
9477 pedwarn (input_location, OPT_pedantic,
9478 "cannot explicitly declare member %q#D to have "
9479 "extern linkage", decl);
9480 storage_class = sc_none;
9485 if (storage_class == sc_extern && initialized && !funcdef_flag)
9487 if (toplevel_bindings_p ())
9489 /* It's common practice (and completely valid) to have a const
9490 be initialized and declared extern. */
9491 if (!(type_quals & TYPE_QUAL_CONST))
9492 warning (0, "%qs initialized and declared %<extern%>", name);
9496 error ("%qs has both %<extern%> and initializer", name);
9497 return error_mark_node;
9501 /* Record `register' declaration for warnings on &
9502 and in case doing stupid register allocation. */
9504 if (storage_class == sc_register)
9505 DECL_REGISTER (decl) = 1;
9506 else if (storage_class == sc_extern)
9507 DECL_THIS_EXTERN (decl) = 1;
9508 else if (storage_class == sc_static)
9509 DECL_THIS_STATIC (decl) = 1;
9511 /* Record constancy and volatility on the DECL itself . There's
9512 no need to do this when processing a template; we'll do this
9513 for the instantiated declaration based on the type of DECL. */
9514 if (!processing_template_decl)
9515 cp_apply_type_quals_to_decl (type_quals, decl);
9518 TREE_NO_WARNING (decl) = 1;
9524 /* Subroutine of start_function. Ensure that each of the parameter
9525 types (as listed in PARMS) is complete, as is required for a
9526 function definition. */
9529 require_complete_types_for_parms (tree parms)
9531 for (; parms; parms = TREE_CHAIN (parms))
9533 if (dependent_type_p (TREE_TYPE (parms)))
9535 if (!VOID_TYPE_P (TREE_TYPE (parms))
9536 && complete_type_or_else (TREE_TYPE (parms), parms))
9538 relayout_decl (parms);
9539 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9542 /* grokparms or complete_type_or_else will have already issued
9544 TREE_TYPE (parms) = error_mark_node;
9548 /* Returns nonzero if T is a local variable. */
9551 local_variable_p (const_tree t)
9553 if ((TREE_CODE (t) == VAR_DECL
9554 /* A VAR_DECL with a context that is a _TYPE is a static data
9556 && !TYPE_P (CP_DECL_CONTEXT (t))
9557 /* Any other non-local variable must be at namespace scope. */
9558 && !DECL_NAMESPACE_SCOPE_P (t))
9559 || (TREE_CODE (t) == PARM_DECL))
9565 /* Like local_variable_p, but suitable for use as a tree-walking
9569 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9570 void *data ATTRIBUTE_UNUSED)
9572 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9574 else if (TYPE_P (*tp))
9581 /* Check that ARG, which is a default-argument expression for a
9582 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9583 something goes wrong. DECL may also be a _TYPE node, rather than a
9584 DECL, if there is no DECL available. */
9587 check_default_argument (tree decl, tree arg)
9592 if (TREE_CODE (arg) == DEFAULT_ARG)
9593 /* We get a DEFAULT_ARG when looking at an in-class declaration
9594 with a default argument. Ignore the argument for now; we'll
9595 deal with it after the class is complete. */
9604 decl_type = TREE_TYPE (decl);
9606 if (arg == error_mark_node
9607 || decl == error_mark_node
9608 || TREE_TYPE (arg) == error_mark_node
9609 || decl_type == error_mark_node)
9610 /* Something already went wrong. There's no need to check
9612 return error_mark_node;
9614 /* [dcl.fct.default]
9616 A default argument expression is implicitly converted to the
9618 if (!TREE_TYPE (arg)
9619 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9622 error ("default argument for %q#D has type %qT",
9623 decl, TREE_TYPE (arg));
9625 error ("default argument for parameter of type %qT has type %qT",
9626 decl_type, TREE_TYPE (arg));
9628 return error_mark_node;
9631 /* [dcl.fct.default]
9633 Local variables shall not be used in default argument
9636 The keyword `this' shall not be used in a default argument of a
9638 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9641 error ("default argument %qE uses local variable %qD", arg, var);
9642 return error_mark_node;
9649 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9652 type_is_deprecated (tree type)
9654 enum tree_code code;
9655 if (TREE_DEPRECATED (type))
9657 if (TYPE_NAME (type)
9658 && TREE_DEPRECATED (TYPE_NAME (type)))
9661 code = TREE_CODE (type);
9663 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9664 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9665 || code == METHOD_TYPE || code == ARRAY_TYPE)
9666 return type_is_deprecated (TREE_TYPE (type));
9668 if (TYPE_PTRMEMFUNC_P (type))
9669 return type_is_deprecated
9670 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9675 /* Decode the list of parameter types for a function type.
9676 Given the list of things declared inside the parens,
9677 return a list of types.
9679 If this parameter does not end with an ellipsis, we append
9682 *PARMS is set to the chain of PARM_DECLs created. */
9685 grokparms (tree parmlist, tree *parms)
9687 tree result = NULL_TREE;
9688 tree decls = NULL_TREE;
9692 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9694 tree type = NULL_TREE;
9695 tree init = TREE_PURPOSE (parm);
9696 tree decl = TREE_VALUE (parm);
9699 if (parm == void_list_node)
9702 if (! decl || TREE_TYPE (decl) == error_mark_node)
9705 type = TREE_TYPE (decl);
9706 if (VOID_TYPE_P (type))
9708 if (same_type_p (type, void_type_node)
9709 && DECL_SELF_REFERENCE_P (type)
9710 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9711 /* this is a parmlist of `(void)', which is ok. */
9713 cxx_incomplete_type_error (decl, type);
9714 /* It's not a good idea to actually create parameters of
9715 type `void'; other parts of the compiler assume that a
9716 void type terminates the parameter list. */
9717 type = error_mark_node;
9718 TREE_TYPE (decl) = error_mark_node;
9721 if (type != error_mark_node
9722 && TYPE_FOR_JAVA (type)
9723 && MAYBE_CLASS_TYPE_P (type))
9725 error ("parameter %qD has Java class type", decl);
9726 type = error_mark_node;
9727 TREE_TYPE (decl) = error_mark_node;
9731 if (type != error_mark_node
9732 && (errmsg = targetm.invalid_parameter_type (type)))
9735 type = error_mark_node;
9736 TREE_TYPE (decl) = error_mark_node;
9739 if (type != error_mark_node)
9741 if (deprecated_state != DEPRECATED_SUPPRESS)
9743 tree deptype = type_is_deprecated (type);
9745 warn_deprecated_use (deptype, NULL_TREE);
9748 /* Top-level qualifiers on the parameters are
9749 ignored for function types. */
9750 type = cp_build_qualified_type (type, 0);
9751 if (TREE_CODE (type) == METHOD_TYPE)
9753 error ("parameter %qD invalidly declared method type", decl);
9754 type = build_pointer_type (type);
9755 TREE_TYPE (decl) = type;
9757 else if (abstract_virtuals_error (decl, type))
9758 any_error = 1; /* Seems like a good idea. */
9759 else if (POINTER_TYPE_P (type))
9761 /* [dcl.fct]/6, parameter types cannot contain pointers
9762 (references) to arrays of unknown bound. */
9763 tree t = TREE_TYPE (type);
9764 int ptr = TYPE_PTR_P (type);
9770 else if (TREE_CODE (t) != ARRAY_TYPE)
9772 else if (!TYPE_DOMAIN (t))
9776 if (TREE_CODE (t) == ARRAY_TYPE)
9777 error ("parameter %qD includes %s to array of unknown "
9779 decl, ptr ? "pointer" : "reference", t);
9784 else if (init && !processing_template_decl)
9785 init = check_default_argument (decl, init);
9788 if (TREE_CODE (decl) == PARM_DECL
9789 && FUNCTION_PARAMETER_PACK_P (decl)
9790 && TREE_CHAIN (parm)
9791 && TREE_CHAIN (parm) != void_list_node)
9792 error ("parameter packs must be at the end of the parameter list");
9794 TREE_CHAIN (decl) = decls;
9796 result = tree_cons (init, type, result);
9798 decls = nreverse (decls);
9799 result = nreverse (result);
9801 result = chainon (result, void_list_node);
9808 /* D is a constructor or overloaded `operator='.
9810 Let T be the class in which D is declared. Then, this function
9813 -1 if D's is an ill-formed constructor or copy assignment operator
9814 whose first parameter is of type `T'.
9815 0 if D is not a copy constructor or copy assignment
9817 1 if D is a copy constructor or copy assignment operator whose
9818 first parameter is a reference to const qualified T.
9819 2 if D is a copy constructor or copy assignment operator whose
9820 first parameter is a reference to non-const qualified T.
9822 This function can be used as a predicate. Positive values indicate
9823 a copy constructor and nonzero values indicate a copy assignment
9827 copy_fn_p (const_tree d)
9833 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9835 if (TREE_CODE (d) == TEMPLATE_DECL
9836 || (DECL_TEMPLATE_INFO (d)
9837 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9838 /* Instantiations of template member functions are never copy
9839 functions. Note that member functions of templated classes are
9840 represented as template functions internally, and we must
9841 accept those as copy functions. */
9844 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9848 arg_type = TREE_VALUE (args);
9849 if (arg_type == error_mark_node)
9852 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9854 /* Pass by value copy assignment operator. */
9857 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9858 && !TYPE_REF_IS_RVALUE (arg_type)
9859 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9861 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9867 args = TREE_CHAIN (args);
9869 if (args && args != void_list_node && !TREE_PURPOSE (args))
9870 /* There are more non-optional args. */
9876 /* D is a constructor or overloaded `operator='.
9878 Let T be the class in which D is declared. Then, this function
9879 returns true when D is a move constructor or move assignment
9880 operator, false otherwise. */
9883 move_fn_p (const_tree d)
9887 bool result = false;
9889 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9891 if (cxx_dialect == cxx98)
9892 /* There are no move constructors if we are in C++98 mode. */
9895 if (TREE_CODE (d) == TEMPLATE_DECL
9896 || (DECL_TEMPLATE_INFO (d)
9897 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9898 /* Instantiations of template member functions are never copy
9899 functions. Note that member functions of templated classes are
9900 represented as template functions internally, and we must
9901 accept those as copy functions. */
9904 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9908 arg_type = TREE_VALUE (args);
9909 if (arg_type == error_mark_node)
9912 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9913 && TYPE_REF_IS_RVALUE (arg_type)
9914 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9918 args = TREE_CHAIN (args);
9920 if (args && args != void_list_node && !TREE_PURPOSE (args))
9921 /* There are more non-optional args. */
9927 /* Remember any special properties of member function DECL. */
9930 grok_special_member_properties (tree decl)
9934 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9937 class_type = DECL_CONTEXT (decl);
9938 if (DECL_CONSTRUCTOR_P (decl))
9940 int ctor = copy_fn_p (decl);
9942 if (!DECL_ARTIFICIAL (decl))
9943 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9949 A non-template constructor for class X is a copy
9950 constructor if its first parameter is of type X&, const
9951 X&, volatile X& or const volatile X&, and either there
9952 are no other parameters or else all other parameters have
9953 default arguments. */
9954 TYPE_HAS_INIT_REF (class_type) = 1;
9955 if (!DECL_DEFAULTED_FN (decl))
9956 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9958 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9960 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9962 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9963 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9964 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9966 else if (is_list_ctor (decl))
9967 TYPE_HAS_LIST_CTOR (class_type) = 1;
9969 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9973 A non-template assignment operator for class X is a copy
9974 assignment operator if its parameter is of type X, X&, const
9975 X&, volatile X& or const volatile X&. */
9977 int assop = copy_fn_p (decl);
9981 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9982 if (!DECL_DEFAULTED_FN (decl))
9983 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9985 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9990 /* Check a constructor DECL has the correct form. Complains
9991 if the class has a constructor of the form X(X). */
9994 grok_ctor_properties (const_tree ctype, const_tree decl)
9996 int ctor_parm = copy_fn_p (decl);
10002 A declaration of a constructor for a class X is ill-formed if
10003 its first parameter is of type (optionally cv-qualified) X
10004 and either there are no other parameters or else all other
10005 parameters have default arguments.
10007 We *don't* complain about member template instantiations that
10008 have this form, though; they can occur as we try to decide
10009 what constructor to use during overload resolution. Since
10010 overload resolution will never prefer such a constructor to
10011 the non-template copy constructor (which is either explicitly
10012 or implicitly defined), there's no need to worry about their
10013 existence. Theoretically, they should never even be
10014 instantiated, but that's hard to forestall. */
10015 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10023 /* An operator with this code is unary, but can also be binary. */
10026 ambi_op_p (enum tree_code code)
10028 return (code == INDIRECT_REF
10029 || code == ADDR_EXPR
10030 || code == UNARY_PLUS_EXPR
10031 || code == NEGATE_EXPR
10032 || code == PREINCREMENT_EXPR
10033 || code == PREDECREMENT_EXPR);
10036 /* An operator with this name can only be unary. */
10039 unary_op_p (enum tree_code code)
10041 return (code == TRUTH_NOT_EXPR
10042 || code == BIT_NOT_EXPR
10043 || code == COMPONENT_REF
10044 || code == TYPE_EXPR);
10047 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10048 errors are issued for invalid declarations. */
10051 grok_op_properties (tree decl, bool complain)
10053 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10055 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10056 tree name = DECL_NAME (decl);
10057 enum tree_code operator_code;
10062 /* Count the number of arguments and check for ellipsis. */
10063 for (argtype = argtypes, arity = 0;
10064 argtype && argtype != void_list_node;
10065 argtype = TREE_CHAIN (argtype))
10067 ellipsis_p = !argtype;
10069 class_type = DECL_CONTEXT (decl);
10070 if (class_type && !CLASS_TYPE_P (class_type))
10071 class_type = NULL_TREE;
10073 if (DECL_CONV_FN_P (decl))
10074 operator_code = TYPE_EXPR;
10078 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10079 if (ansi_opname (CODE) == name) \
10081 operator_code = (CODE); \
10084 else if (ansi_assopname (CODE) == name) \
10086 operator_code = (CODE); \
10087 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10091 #include "operators.def"
10092 #undef DEF_OPERATOR
10094 gcc_unreachable ();
10097 gcc_assert (operator_code != MAX_TREE_CODES);
10098 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10101 switch (operator_code)
10104 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10108 TYPE_GETS_DELETE (class_type) |= 1;
10112 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10115 case VEC_DELETE_EXPR:
10116 TYPE_GETS_DELETE (class_type) |= 2;
10123 /* [basic.std.dynamic.allocation]/1:
10125 A program is ill-formed if an allocation function is declared
10126 in a namespace scope other than global scope or declared static
10129 The same also holds true for deallocation functions. */
10130 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10131 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10133 if (DECL_NAMESPACE_SCOPE_P (decl))
10135 if (CP_DECL_CONTEXT (decl) != global_namespace)
10137 error ("%qD may not be declared within a namespace", decl);
10140 else if (!TREE_PUBLIC (decl))
10142 error ("%qD may not be declared as static", decl);
10148 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10150 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10151 DECL_IS_OPERATOR_NEW (decl) = 1;
10153 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10154 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10157 /* An operator function must either be a non-static member function
10158 or have at least one parameter of a class, a reference to a class,
10159 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10160 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10162 if (operator_code == TYPE_EXPR
10163 || operator_code == CALL_EXPR
10164 || operator_code == COMPONENT_REF
10165 || operator_code == ARRAY_REF
10166 || operator_code == NOP_EXPR)
10168 error ("%qD must be a nonstatic member function", decl);
10175 if (DECL_STATIC_FUNCTION_P (decl))
10177 error ("%qD must be either a non-static member "
10178 "function or a non-member function", decl);
10182 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10184 tree arg = non_reference (TREE_VALUE (p));
10185 if (arg == error_mark_node)
10188 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10189 because these checks are performed even on
10190 template functions. */
10191 if (MAYBE_CLASS_TYPE_P (arg)
10192 || TREE_CODE (arg) == ENUMERAL_TYPE)
10196 if (!p || p == void_list_node)
10199 error ("%qD must have an argument of class or "
10200 "enumerated type", decl);
10206 /* There are no restrictions on the arguments to an overloaded
10208 if (operator_code == CALL_EXPR)
10211 /* Warn about conversion operators that will never be used. */
10212 if (IDENTIFIER_TYPENAME_P (name)
10213 && ! DECL_TEMPLATE_INFO (decl)
10215 /* Warn only declaring the function; there is no need to
10216 warn again about out-of-class definitions. */
10217 && class_type == current_class_type)
10219 tree t = TREE_TYPE (name);
10220 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10221 const char *what = 0;
10224 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10226 if (TREE_CODE (t) == VOID_TYPE)
10228 else if (class_type)
10230 if (t == class_type)
10231 what = "the same type";
10232 /* Don't force t to be complete here. */
10233 else if (MAYBE_CLASS_TYPE_P (t)
10234 && COMPLETE_TYPE_P (t)
10235 && DERIVED_FROM_P (t, class_type))
10236 what = "a base class";
10240 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10241 "conversion operator",
10242 ref ? "a reference to " : "", what);
10245 if (operator_code == COND_EXPR)
10248 error ("ISO C++ prohibits overloading operator ?:");
10251 else if (ellipsis_p)
10253 error ("%qD must not have variable number of arguments", decl);
10256 else if (ambi_op_p (operator_code))
10259 /* We pick the one-argument operator codes by default, so
10260 we don't have to change anything. */
10262 else if (arity == 2)
10264 /* If we thought this was a unary operator, we now know
10265 it to be a binary operator. */
10266 switch (operator_code)
10269 operator_code = MULT_EXPR;
10273 operator_code = BIT_AND_EXPR;
10276 case UNARY_PLUS_EXPR:
10277 operator_code = PLUS_EXPR;
10281 operator_code = MINUS_EXPR;
10284 case PREINCREMENT_EXPR:
10285 operator_code = POSTINCREMENT_EXPR;
10288 case PREDECREMENT_EXPR:
10289 operator_code = POSTDECREMENT_EXPR;
10293 gcc_unreachable ();
10296 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10298 if ((operator_code == POSTINCREMENT_EXPR
10299 || operator_code == POSTDECREMENT_EXPR)
10300 && ! processing_template_decl
10301 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10304 error ("postfix %qD must take %<int%> as its argument",
10307 error ("postfix %qD must take %<int%> as its second "
10315 error ("%qD must take either zero or one argument", decl);
10317 error ("%qD must take either one or two arguments", decl);
10321 /* More Effective C++ rule 6. */
10323 && (operator_code == POSTINCREMENT_EXPR
10324 || operator_code == POSTDECREMENT_EXPR
10325 || operator_code == PREINCREMENT_EXPR
10326 || operator_code == PREDECREMENT_EXPR))
10328 tree arg = TREE_VALUE (argtypes);
10329 tree ret = TREE_TYPE (TREE_TYPE (decl));
10330 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10331 arg = TREE_TYPE (arg);
10332 arg = TYPE_MAIN_VARIANT (arg);
10333 if (operator_code == PREINCREMENT_EXPR
10334 || operator_code == PREDECREMENT_EXPR)
10336 if (TREE_CODE (ret) != REFERENCE_TYPE
10337 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10339 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10340 build_reference_type (arg));
10344 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10345 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10349 else if (unary_op_p (operator_code))
10354 error ("%qD must take %<void%>", decl);
10356 error ("%qD must take exactly one argument", decl);
10360 else /* if (binary_op_p (operator_code)) */
10365 error ("%qD must take exactly one argument", decl);
10367 error ("%qD must take exactly two arguments", decl);
10371 /* More Effective C++ rule 7. */
10373 && (operator_code == TRUTH_ANDIF_EXPR
10374 || operator_code == TRUTH_ORIF_EXPR
10375 || operator_code == COMPOUND_EXPR))
10376 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10380 /* Effective C++ rule 23. */
10383 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10384 && (operator_code == PLUS_EXPR
10385 || operator_code == MINUS_EXPR
10386 || operator_code == TRUNC_DIV_EXPR
10387 || operator_code == MULT_EXPR
10388 || operator_code == TRUNC_MOD_EXPR)
10389 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10390 warning (OPT_Weffc__, "%qD should return by value", decl);
10392 /* [over.oper]/8 */
10393 for (; argtypes && argtypes != void_list_node;
10394 argtypes = TREE_CHAIN (argtypes))
10395 if (TREE_PURPOSE (argtypes))
10397 TREE_PURPOSE (argtypes) = NULL_TREE;
10398 if (operator_code == POSTINCREMENT_EXPR
10399 || operator_code == POSTDECREMENT_EXPR)
10401 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10406 error ("%qD cannot have default arguments", decl);
10414 /* Return a string giving the keyword associate with CODE. */
10416 static const char *
10417 tag_name (enum tag_types code)
10429 case typename_type:
10432 gcc_unreachable ();
10436 /* Name lookup in an elaborated-type-specifier (after the keyword
10437 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10438 elaborated-type-specifier is invalid, issue a diagnostic and return
10439 error_mark_node; otherwise, return the *_TYPE to which it referred.
10440 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10443 check_elaborated_type_specifier (enum tag_types tag_code,
10445 bool allow_template_p)
10451 struct S { struct S *p; };
10453 name lookup will find the TYPE_DECL for the implicit "S::S"
10454 typedef. Adjust for that here. */
10455 if (DECL_SELF_REFERENCE_P (decl))
10456 decl = TYPE_NAME (TREE_TYPE (decl));
10458 type = TREE_TYPE (decl);
10460 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10461 is false for this case as well. */
10462 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10464 error ("using template type parameter %qT after %qs",
10465 type, tag_name (tag_code));
10466 return error_mark_node;
10470 If the identifier resolves to a typedef-name or a template
10471 type-parameter, the elaborated-type-specifier is ill-formed.
10473 In other words, the only legitimate declaration to use in the
10474 elaborated type specifier is the implicit typedef created when
10475 the type is declared. */
10476 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10477 && tag_code != typename_type)
10479 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10480 error ("%q+D has a previous declaration here", decl);
10481 return error_mark_node;
10483 else if (TREE_CODE (type) != RECORD_TYPE
10484 && TREE_CODE (type) != UNION_TYPE
10485 && tag_code != enum_type
10486 && tag_code != typename_type)
10488 error ("%qT referred to as %qs", type, tag_name (tag_code));
10489 error ("%q+T has a previous declaration here", type);
10490 return error_mark_node;
10492 else if (TREE_CODE (type) != ENUMERAL_TYPE
10493 && tag_code == enum_type)
10495 error ("%qT referred to as enum", type);
10496 error ("%q+T has a previous declaration here", type);
10497 return error_mark_node;
10499 else if (!allow_template_p
10500 && TREE_CODE (type) == RECORD_TYPE
10501 && CLASSTYPE_IS_TEMPLATE (type))
10503 /* If a class template appears as elaborated type specifier
10504 without a template header such as:
10506 template <class T> class C {};
10507 void f(class C); // No template header here
10509 then the required template argument is missing. */
10510 error ("template argument required for %<%s %T%>",
10511 tag_name (tag_code),
10512 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10513 return error_mark_node;
10519 /* Lookup NAME in elaborate type specifier in scope according to
10520 SCOPE and issue diagnostics if necessary.
10521 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10522 found, and ERROR_MARK_NODE for type error. */
10525 lookup_and_check_tag (enum tag_types tag_code, tree name,
10526 tag_scope scope, bool template_header_p)
10530 if (scope == ts_global)
10532 /* First try ordinary name lookup, ignoring hidden class name
10533 injected via friend declaration. */
10534 decl = lookup_name_prefer_type (name, 2);
10535 /* If that fails, the name will be placed in the smallest
10536 non-class, non-function-prototype scope according to 3.3.1/5.
10537 We may already have a hidden name declared as friend in this
10538 scope. So lookup again but not ignoring hidden names.
10539 If we find one, that name will be made visible rather than
10540 creating a new tag. */
10542 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10545 decl = lookup_type_scope (name, scope);
10547 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10548 decl = DECL_TEMPLATE_RESULT (decl);
10550 if (decl && TREE_CODE (decl) == TYPE_DECL)
10552 /* Look for invalid nested type:
10556 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10558 error ("%qD has the same name as the class in which it is "
10561 return error_mark_node;
10564 /* Two cases we need to consider when deciding if a class
10565 template is allowed as an elaborated type specifier:
10566 1. It is a self reference to its own class.
10567 2. It comes with a template header.
10571 template <class T> class C {
10572 class C *c1; // DECL_SELF_REFERENCE_P is true
10575 template <class U> class C; // template_header_p is true
10576 template <class T> class C<T>::D {
10577 class C *c2; // DECL_SELF_REFERENCE_P is true
10580 t = check_elaborated_type_specifier (tag_code,
10583 | DECL_SELF_REFERENCE_P (decl));
10586 else if (decl && TREE_CODE (decl) == TREE_LIST)
10588 error ("reference to %qD is ambiguous", name);
10589 print_candidates (decl);
10590 return error_mark_node;
10596 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10597 Define the tag as a forward-reference if it is not defined.
10599 If a declaration is given, process it here, and report an error if
10600 multiple declarations are not identical.
10602 SCOPE is TS_CURRENT when this is also a definition. Only look in
10603 the current frame for the name (since C++ allows new names in any
10604 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10605 declaration. Only look beginning from the current scope outward up
10606 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10608 TEMPLATE_HEADER_P is true when this declaration is preceded by
10609 a set of template parameters. */
10612 xref_tag (enum tag_types tag_code, tree name,
10613 tag_scope scope, bool template_header_p)
10615 enum tree_code code;
10617 tree context = NULL_TREE;
10619 timevar_push (TV_NAME_LOOKUP);
10621 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10627 code = RECORD_TYPE;
10633 code = ENUMERAL_TYPE;
10636 gcc_unreachable ();
10639 /* In case of anonymous name, xref_tag is only called to
10640 make type node and push name. Name lookup is not required. */
10641 if (ANON_AGGRNAME_P (name))
10644 t = lookup_and_check_tag (tag_code, name,
10645 scope, template_header_p);
10647 if (t == error_mark_node)
10648 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10650 if (scope != ts_current && t && current_class_type
10651 && template_class_depth (current_class_type)
10652 && template_header_p)
10654 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10655 definition of this tag. Since, in addition, we are currently
10656 processing a (member) template declaration of a template
10657 class, we must be very careful; consider:
10664 { template <class V>
10665 friend struct S1; };
10667 Here, the S2::S1 declaration should not be confused with the
10668 outer declaration. In particular, the inner version should
10669 have a template parameter of level 2, not level 1. This
10670 would be particularly important if the member declaration
10673 template <class V = U> friend struct S1;
10675 say, when we should tsubst into `U' when instantiating
10676 S2. On the other hand, when presented with:
10686 we must find the inner binding eventually. We
10687 accomplish this by making sure that the new type we
10688 create to represent this declaration has the right
10690 context = TYPE_CONTEXT (t);
10696 /* If no such tag is yet defined, create a forward-reference node
10697 and record it as the "definition".
10698 When a real declaration of this type is found,
10699 the forward-reference will be altered into a real type. */
10700 if (code == ENUMERAL_TYPE)
10702 error ("use of enum %q#D without previous declaration", name);
10703 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10707 t = make_class_type (code);
10708 TYPE_CONTEXT (t) = context;
10709 t = pushtag (name, t, scope);
10714 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10716 if (!redeclare_class_template (t, current_template_parms))
10717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10719 else if (!processing_template_decl
10720 && CLASS_TYPE_P (t)
10721 && CLASSTYPE_IS_TEMPLATE (t))
10723 error ("redeclaration of %qT as a non-template", t);
10724 error ("previous declaration %q+D", t);
10725 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10728 /* Make injected friend class visible. */
10729 if (scope != ts_within_enclosing_non_class
10730 && hidden_name_p (TYPE_NAME (t)))
10732 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10733 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10735 if (TYPE_TEMPLATE_INFO (t))
10737 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10738 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10743 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10747 xref_tag_from_type (tree old, tree id, tag_scope scope)
10749 enum tag_types tag_kind;
10751 if (TREE_CODE (old) == RECORD_TYPE)
10752 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10754 tag_kind = union_type;
10756 if (id == NULL_TREE)
10757 id = TYPE_IDENTIFIER (old);
10759 return xref_tag (tag_kind, id, scope, false);
10762 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10763 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10764 access_* node, and the TREE_VALUE is the type of the base-class.
10765 Non-NULL TREE_TYPE indicates virtual inheritance.
10767 Returns true if the binfo hierarchy was successfully created,
10768 false if an error was detected. */
10771 xref_basetypes (tree ref, tree base_list)
10774 tree binfo, base_binfo;
10775 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10776 unsigned max_bases = 0; /* Maximum direct bases. */
10778 tree default_access;
10779 tree igo_prev; /* Track Inheritance Graph Order. */
10781 if (ref == error_mark_node)
10784 /* The base of a derived class is private by default, all others are
10786 default_access = (TREE_CODE (ref) == RECORD_TYPE
10787 && CLASSTYPE_DECLARED_CLASS (ref)
10788 ? access_private_node : access_public_node);
10790 /* First, make sure that any templates in base-classes are
10791 instantiated. This ensures that if we call ourselves recursively
10792 we do not get confused about which classes are marked and which
10794 basep = &base_list;
10797 tree basetype = TREE_VALUE (*basep);
10799 if (!(processing_template_decl && uses_template_parms (basetype))
10800 && !complete_type_or_else (basetype, NULL))
10801 /* An incomplete type. Remove it from the list. */
10802 *basep = TREE_CHAIN (*basep);
10806 if (TREE_TYPE (*basep))
10808 if (CLASS_TYPE_P (basetype))
10809 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10810 basep = &TREE_CHAIN (*basep);
10814 TYPE_MARKED_P (ref) = 1;
10816 /* The binfo slot should be empty, unless this is an (ill-formed)
10818 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10819 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10821 binfo = make_tree_binfo (max_bases);
10823 TYPE_BINFO (ref) = binfo;
10824 BINFO_OFFSET (binfo) = size_zero_node;
10825 BINFO_TYPE (binfo) = ref;
10827 /* Apply base-class info set up to the variants of this type. */
10828 fixup_type_variants (ref);
10832 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10833 /* An aggregate cannot have baseclasses. */
10834 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10836 if (TREE_CODE (ref) == UNION_TYPE)
10838 error ("derived union %qT invalid", ref);
10845 if (TYPE_FOR_JAVA (ref))
10847 error ("Java class %qT cannot have multiple bases", ref);
10854 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10856 if (TYPE_FOR_JAVA (ref))
10858 error ("Java class %qT cannot have virtual bases", ref);
10863 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10865 tree access = TREE_PURPOSE (base_list);
10866 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10867 tree basetype = TREE_VALUE (base_list);
10869 if (access == access_default_node)
10870 access = default_access;
10872 if (PACK_EXPANSION_P (basetype))
10873 basetype = PACK_EXPANSION_PATTERN (basetype);
10874 if (TREE_CODE (basetype) == TYPE_DECL)
10875 basetype = TREE_TYPE (basetype);
10876 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10878 error ("base type %qT fails to be a struct or class type",
10883 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10884 TYPE_FOR_JAVA (ref) = 1;
10886 base_binfo = NULL_TREE;
10887 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10889 base_binfo = TYPE_BINFO (basetype);
10890 /* The original basetype could have been a typedef'd type. */
10891 basetype = BINFO_TYPE (base_binfo);
10893 /* Inherit flags from the base. */
10894 TYPE_HAS_NEW_OPERATOR (ref)
10895 |= TYPE_HAS_NEW_OPERATOR (basetype);
10896 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10897 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10898 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10899 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10900 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10901 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10902 CLASSTYPE_REPEATED_BASE_P (ref)
10903 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10906 /* We must do this test after we've seen through a typedef
10908 if (TYPE_MARKED_P (basetype))
10910 if (basetype == ref)
10911 error ("recursive type %qT undefined", basetype);
10913 error ("duplicate base type %qT invalid", basetype);
10917 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10918 /* Regenerate the pack expansion for the bases. */
10919 basetype = make_pack_expansion (basetype);
10921 TYPE_MARKED_P (basetype) = 1;
10923 base_binfo = copy_binfo (base_binfo, basetype, ref,
10924 &igo_prev, via_virtual);
10925 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10926 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10928 BINFO_BASE_APPEND (binfo, base_binfo);
10929 BINFO_BASE_ACCESS_APPEND (binfo, access);
10932 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10933 /* If we have space in the vbase vector, we must have shared at
10934 least one of them, and are therefore diamond shaped. */
10935 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10937 /* Unmark all the types. */
10938 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10939 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10940 TYPE_MARKED_P (ref) = 0;
10942 /* Now see if we have a repeated base type. */
10943 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10945 for (base_binfo = binfo; base_binfo;
10946 base_binfo = TREE_CHAIN (base_binfo))
10948 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10950 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10953 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10955 for (base_binfo = binfo; base_binfo;
10956 base_binfo = TREE_CHAIN (base_binfo))
10957 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10958 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10967 /* Begin compiling the definition of an enumeration type.
10970 UNDERLYING_TYPE is the type that will be used as the storage for
10971 the enumeration type. This should be NULL_TREE if no storage type
10974 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10976 Returns the type object, as yet incomplete.
10977 Also records info about it so that build_enumerator
10978 may be used to declare the individual values as they are read. */
10981 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10985 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10987 /* If this is the real definition for a previous forward reference,
10988 fill in the contents in the same object that used to be the
10989 forward reference. */
10991 enumtype = lookup_and_check_tag (enum_type, name,
10992 /*tag_scope=*/ts_current,
10993 /*template_header_p=*/false);
10995 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10997 error ("multiple definition of %q#T", enumtype);
10998 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10999 /* Clear out TYPE_VALUES, and start again. */
11000 TYPE_VALUES (enumtype) = NULL_TREE;
11004 /* In case of error, make a dummy enum to allow parsing to
11006 if (enumtype == error_mark_node)
11007 name = make_anon_name ();
11009 enumtype = make_node (ENUMERAL_TYPE);
11010 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11013 if (enumtype == error_mark_node)
11018 SET_SCOPED_ENUM_P (enumtype, 1);
11019 begin_scope (sk_scoped_enum, enumtype);
11021 /* [C++0x dcl.enum]p5:
11023 If not explicitly specified, the underlying type of a scoped
11024 enumeration type is int. */
11025 if (!underlying_type)
11026 underlying_type = integer_type_node;
11029 if (underlying_type)
11031 if (CP_INTEGRAL_TYPE_P (underlying_type))
11033 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11034 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11035 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11036 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11037 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11038 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11039 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11040 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11041 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11042 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11045 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11046 underlying_type, enumtype);
11052 /* After processing and defining all the values of an enumeration type,
11053 install their decls in the enumeration type and finish it off.
11054 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11057 finish_enum (tree enumtype)
11066 bool use_short_enum;
11071 tree underlying_type = NULL_TREE;
11072 bool fixed_underlying_type_p
11073 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11075 /* We built up the VALUES in reverse order. */
11076 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11078 /* For an enum defined in a template, just set the type of the values;
11079 all further processing is postponed until the template is
11080 instantiated. We need to set the type so that tsubst of a CONST_DECL
11082 if (processing_template_decl)
11084 for (values = TYPE_VALUES (enumtype);
11086 values = TREE_CHAIN (values))
11087 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11088 if (at_function_scope_p ())
11089 add_stmt (build_min (TAG_DEFN, enumtype));
11093 /* Determine the minimum and maximum values of the enumerators. */
11094 if (TYPE_VALUES (enumtype))
11096 minnode = maxnode = NULL_TREE;
11098 for (values = TYPE_VALUES (enumtype);
11100 values = TREE_CHAIN (values))
11102 decl = TREE_VALUE (values);
11104 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11105 each enumerator has the type of its enumeration. Prior to the
11106 closing brace, the type of each enumerator is the type of its
11107 initializing value. */
11108 TREE_TYPE (decl) = enumtype;
11110 /* Update the minimum and maximum values, if appropriate. */
11111 value = DECL_INITIAL (decl);
11112 if (value == error_mark_node)
11113 value = integer_zero_node;
11114 /* Figure out what the minimum and maximum values of the
11115 enumerators are. */
11117 minnode = maxnode = value;
11118 else if (tree_int_cst_lt (maxnode, value))
11120 else if (tree_int_cst_lt (value, minnode))
11127 If the enumerator-list is empty, the underlying type is as if
11128 the enumeration had a single enumerator with value 0. */
11129 minnode = maxnode = integer_zero_node;
11131 /* Compute the number of bits require to represent all values of the
11132 enumeration. We must do this before the type of MINNODE and
11133 MAXNODE are transformed, since tree_int_cst_min_precision relies
11134 on the TREE_TYPE of the value it is passed. */
11135 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11136 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11137 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11138 precision = MAX (lowprec, highprec);
11140 if (!fixed_underlying_type_p)
11142 /* Determine the underlying type of the enumeration.
11146 The underlying type of an enumeration is an integral type that
11147 can represent all the enumerator values defined in the
11148 enumeration. It is implementation-defined which integral type is
11149 used as the underlying type for an enumeration except that the
11150 underlying type shall not be larger than int unless the value of
11151 an enumerator cannot fit in an int or unsigned int.
11153 We use "int" or an "unsigned int" as the underlying type, even if
11154 a smaller integral type would work, unless the user has
11155 explicitly requested that we use the smallest possible type. The
11156 user can request that for all enumerations with a command line
11157 flag, or for just one enumeration with an attribute. */
11159 use_short_enum = flag_short_enums
11160 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11162 for (itk = (use_short_enum ? itk_char : itk_int);
11166 underlying_type = integer_types[itk];
11167 if (TYPE_PRECISION (underlying_type) >= precision
11168 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11171 if (itk == itk_none)
11175 IF no integral type can represent all the enumerator values, the
11176 enumeration is ill-formed. */
11177 error ("no integral type can represent all of the enumerator values "
11178 "for %qT", enumtype);
11179 precision = TYPE_PRECISION (long_long_integer_type_node);
11180 underlying_type = integer_types[itk_unsigned_long_long];
11185 The value of sizeof() applied to an enumeration type, an object
11186 of an enumeration type, or an enumerator, is the value of sizeof()
11187 applied to the underlying type. */
11188 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11189 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11190 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11191 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11192 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11193 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11195 /* Set the underlying type of the enumeration type to the
11196 computed enumeration type, restricted to the enumerator
11198 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11199 set_min_and_max_values_for_integral_type
11200 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11203 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11205 /* Compute the minimum and maximum values for the type.
11209 For an enumeration where emin is the smallest enumerator and emax
11210 is the largest, the values of the enumeration are the values of the
11211 underlying type in the range bmin to bmax, where bmin and bmax are,
11212 respectively, the smallest and largest values of the smallest bit-
11213 field that can store emin and emax. */
11215 /* The middle-end currently assumes that types with TYPE_PRECISION
11216 narrower than their underlying type are suitably zero or sign
11217 extended to fill their mode. g++ doesn't make these guarantees.
11218 Until the middle-end can represent such paradoxical types, we
11219 set the TYPE_PRECISION to the width of the underlying type. */
11220 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11222 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11224 /* Convert each of the enumerators to the type of the underlying
11225 type of the enumeration. */
11226 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11228 location_t saved_location;
11230 decl = TREE_VALUE (values);
11231 saved_location = input_location;
11232 input_location = DECL_SOURCE_LOCATION (decl);
11233 if (fixed_underlying_type_p)
11234 /* If the enumeration type has a fixed underlying type, we
11235 already checked all of the enumerator values. */
11236 value = DECL_INITIAL (decl);
11238 value = perform_implicit_conversion (underlying_type,
11239 DECL_INITIAL (decl),
11240 tf_warning_or_error);
11241 input_location = saved_location;
11243 /* Do not clobber shared ints. */
11244 value = copy_node (value);
11246 TREE_TYPE (value) = enumtype;
11247 DECL_INITIAL (decl) = value;
11250 /* Fix up all variant types of this enum type. */
11251 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11253 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11254 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11255 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11256 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11257 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11258 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11259 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11260 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11261 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11262 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11263 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11266 /* Finish up the scope of a scoped enumeration. */
11267 if (SCOPED_ENUM_P (enumtype))
11270 /* Finish debugging output for this type. */
11271 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11274 /* Build and install a CONST_DECL for an enumeration constant of the
11275 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11276 Assignment of sequential values by default is handled here. */
11279 build_enumerator (tree name, tree value, tree enumtype)
11285 /* If the VALUE was erroneous, pretend it wasn't there; that will
11286 result in the enum being assigned the next value in sequence. */
11287 if (value == error_mark_node)
11290 /* Remove no-op casts from the value. */
11292 STRIP_TYPE_NOPS (value);
11294 if (! processing_template_decl)
11296 /* Validate and default VALUE. */
11297 if (value != NULL_TREE)
11299 value = integral_constant_value (value);
11301 if (TREE_CODE (value) == INTEGER_CST)
11303 value = perform_integral_promotions (value);
11304 constant_expression_warning (value);
11308 error ("enumerator value for %qD is not an integer constant", name);
11313 /* Default based on previous value. */
11314 if (value == NULL_TREE)
11316 if (TYPE_VALUES (enumtype))
11319 unsigned HOST_WIDE_INT lo;
11323 /* The next value is the previous value plus one.
11324 add_double doesn't know the type of the target expression,
11325 so we must check with int_fits_type_p as well. */
11326 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11327 if (error_operand_p (prev_value))
11328 value = error_mark_node;
11331 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11332 TREE_INT_CST_HIGH (prev_value),
11334 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11336 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11340 error ("overflow in enumeration values at %qD", name);
11341 value = error_mark_node;
11346 value = integer_zero_node;
11349 /* Remove no-op casts from the value. */
11350 STRIP_TYPE_NOPS (value);
11352 /* If the underlying type of the enum is fixed, check whether
11353 the enumerator values fits in the underlying type. If it
11354 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11355 if (ENUM_UNDERLYING_TYPE (enumtype)
11357 && TREE_CODE (value) == INTEGER_CST
11358 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11360 error ("enumerator value %E is too large for underlying type %<%T%>",
11361 value, ENUM_UNDERLYING_TYPE (enumtype));
11363 /* Silently convert the value so that we can continue. */
11364 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11369 /* C++ associates enums with global, function, or class declarations. */
11370 context = current_scope ();
11372 /* Build the actual enumeration constant. Note that the enumeration
11373 constants have the underlying type of the enum (if it is fixed)
11374 or the type of their initializer (if the underlying type of the
11375 enum is not fixed):
11379 If the underlying type is fixed, the type of each enumerator
11380 prior to the closing brace is the underlying type; if the
11381 initializing value of an enumerator cannot be represented by
11382 the underlying type, the program is ill-formed. If the
11383 underlying type is not fixed, the type of each enumerator is
11384 the type of its initializing value.
11386 If the underlying type is not fixed, it will be computed by
11387 finish_enum and we will reset the type of this enumerator. Of
11388 course, if we're processing a template, there may be no value. */
11389 type = value ? TREE_TYPE (value) : NULL_TREE;
11391 if (context && context == current_class_type)
11392 /* This enum declaration is local to the class. We need the full
11393 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11394 decl = build_lang_decl (CONST_DECL, name, type);
11396 /* It's a global enum, or it's local to a function. (Note local to
11397 a function could mean local to a class method. */
11398 decl = build_decl (input_location, CONST_DECL, name, type);
11400 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11401 TREE_CONSTANT (decl) = 1;
11402 TREE_READONLY (decl) = 1;
11403 DECL_INITIAL (decl) = value;
11405 if (context && context == current_class_type)
11406 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11407 on the TYPE_FIELDS list for `S'. (That's so that you can say
11408 things like `S::i' later.) */
11409 finish_member_declaration (decl);
11413 /* Add this enumeration constant to the list for this type. */
11414 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11417 /* Look for an enumerator with the given NAME within the enumeration
11418 type ENUMTYPE. This routine is used primarily for qualified name
11419 lookup into an enumerator in C++0x, e.g.,
11421 enum class Color { Red, Green, Blue };
11423 Color color = Color::Red;
11425 Returns the value corresponding to the enumerator, or
11426 NULL_TREE if no such enumerator was found. */
11428 lookup_enumerator (tree enumtype, tree name)
11431 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11433 e = purpose_member (name, TYPE_VALUES (enumtype));
11434 return e? TREE_VALUE (e) : NULL_TREE;
11438 /* We're defining DECL. Make sure that it's type is OK. */
11441 check_function_type (tree decl, tree current_function_parms)
11443 tree fntype = TREE_TYPE (decl);
11444 tree return_type = complete_type (TREE_TYPE (fntype));
11446 /* In a function definition, arg types must be complete. */
11447 require_complete_types_for_parms (current_function_parms);
11449 if (dependent_type_p (return_type))
11451 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11452 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11454 tree args = TYPE_ARG_TYPES (fntype);
11456 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11457 error ("return type %q#T is incomplete", return_type);
11459 error ("return type has Java class type %q#T", return_type);
11461 /* Make it return void instead. */
11462 if (TREE_CODE (fntype) == METHOD_TYPE)
11463 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11465 TREE_CHAIN (args));
11467 fntype = build_function_type (void_type_node, args);
11469 = build_exception_variant (fntype,
11470 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11473 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11476 /* Create the FUNCTION_DECL for a function definition.
11477 DECLSPECS and DECLARATOR are the parts of the declaration;
11478 they describe the function's name and the type it returns,
11479 but twisted together in a fashion that parallels the syntax of C.
11481 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11482 DECLARATOR is really the DECL for the function we are about to
11483 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11484 indicating that the function is an inline defined in-class.
11486 This function creates a binding context for the function body
11487 as well as setting up the FUNCTION_DECL in current_function_decl.
11489 For C++, we must first check whether that datum makes any sense.
11490 For example, "class A local_a(1,2);" means that variable local_a
11491 is an aggregate of type A, which should have a constructor
11492 applied to it with the argument list [1, 2].
11494 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11495 or may be a BLOCK if the function has been defined previously
11496 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11497 error_mark_node if the function has never been defined, or
11498 a BLOCK if the function has been defined somewhere. */
11501 start_preparsed_function (tree decl1, tree attrs, int flags)
11503 tree ctype = NULL_TREE;
11506 int doing_friend = 0;
11507 struct cp_binding_level *bl;
11508 tree current_function_parms;
11509 struct c_fileinfo *finfo
11510 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11511 bool honor_interface;
11513 /* Sanity check. */
11514 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11515 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11517 fntype = TREE_TYPE (decl1);
11518 if (TREE_CODE (fntype) == METHOD_TYPE)
11519 ctype = TYPE_METHOD_BASETYPE (fntype);
11521 /* ISO C++ 11.4/5. A friend function defined in a class is in
11522 the (lexical) scope of the class in which it is defined. */
11523 if (!ctype && DECL_FRIEND_P (decl1))
11525 ctype = DECL_FRIEND_CONTEXT (decl1);
11527 /* CTYPE could be null here if we're dealing with a template;
11528 for example, `inline friend float foo()' inside a template
11529 will have no CTYPE set. */
11530 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11536 if (DECL_DECLARED_INLINE_P (decl1)
11537 && lookup_attribute ("noinline", attrs))
11538 warning (0, "inline function %q+D given attribute noinline", decl1);
11540 /* Handle gnu_inline attribute. */
11541 if (GNU_INLINE_P (decl1))
11543 DECL_EXTERNAL (decl1) = 1;
11544 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11545 DECL_INTERFACE_KNOWN (decl1) = 1;
11546 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11549 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11550 /* This is a constructor, we must ensure that any default args
11551 introduced by this definition are propagated to the clones
11552 now. The clones are used directly in overload resolution. */
11553 adjust_clone_args (decl1);
11555 /* Sometimes we don't notice that a function is a static member, and
11556 build a METHOD_TYPE for it. Fix that up now. */
11557 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11558 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11560 revert_static_member_fn (decl1);
11564 /* Set up current_class_type, and enter the scope of the class, if
11567 push_nested_class (ctype);
11568 else if (DECL_STATIC_FUNCTION_P (decl1))
11569 push_nested_class (DECL_CONTEXT (decl1));
11571 /* Now that we have entered the scope of the class, we must restore
11572 the bindings for any template parameters surrounding DECL1, if it
11573 is an inline member template. (Order is important; consider the
11574 case where a template parameter has the same name as a field of
11575 the class.) It is not until after this point that
11576 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11577 if (flags & SF_INCLASS_INLINE)
11578 maybe_begin_member_template_processing (decl1);
11580 /* Effective C++ rule 15. */
11582 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11583 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11584 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11586 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11587 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11588 if (!DECL_INITIAL (decl1))
11589 DECL_INITIAL (decl1) = error_mark_node;
11591 /* This function exists in static storage.
11592 (This does not mean `static' in the C sense!) */
11593 TREE_STATIC (decl1) = 1;
11595 /* We must call push_template_decl after current_class_type is set
11596 up. (If we are processing inline definitions after exiting a
11597 class scope, current_class_type will be NULL_TREE until set above
11598 by push_nested_class.) */
11599 if (processing_template_decl)
11601 /* FIXME: Handle error_mark_node more gracefully. */
11602 tree newdecl1 = push_template_decl (decl1);
11603 if (newdecl1 != error_mark_node)
11607 /* We are now in the scope of the function being defined. */
11608 current_function_decl = decl1;
11610 /* Save the parm names or decls from this function's declarator
11611 where store_parm_decls will find them. */
11612 current_function_parms = DECL_ARGUMENTS (decl1);
11614 /* Make sure the parameter and return types are reasonable. When
11615 you declare a function, these types can be incomplete, but they
11616 must be complete when you define the function. */
11617 check_function_type (decl1, current_function_parms);
11619 /* Build the return declaration for the function. */
11620 restype = TREE_TYPE (fntype);
11621 if (DECL_RESULT (decl1) == NULL_TREE)
11625 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11626 DECL_ARTIFICIAL (resdecl) = 1;
11627 DECL_IGNORED_P (resdecl) = 1;
11628 DECL_RESULT (decl1) = resdecl;
11630 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11633 /* Let the user know we're compiling this function. */
11634 announce_function (decl1);
11636 /* Record the decl so that the function name is defined.
11637 If we already have a decl for this name, and it is a FUNCTION_DECL,
11638 use the old decl. */
11639 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11641 /* A specialization is not used to guide overload resolution. */
11642 if (!DECL_FUNCTION_MEMBER_P (decl1)
11643 && !(DECL_USE_TEMPLATE (decl1) &&
11644 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11646 tree olddecl = pushdecl (decl1);
11648 if (olddecl == error_mark_node)
11649 /* If something went wrong when registering the declaration,
11650 use DECL1; we have to have a FUNCTION_DECL to use when
11651 parsing the body of the function. */
11655 /* Otherwise, OLDDECL is either a previous declaration
11656 of the same function or DECL1 itself. */
11658 if (warn_missing_declarations
11659 && olddecl == decl1
11660 && !DECL_MAIN_P (decl1)
11661 && TREE_PUBLIC (decl1)
11662 && !DECL_DECLARED_INLINE_P (decl1))
11666 /* Check whether DECL1 is in an anonymous
11668 for (context = DECL_CONTEXT (decl1);
11670 context = DECL_CONTEXT (context))
11672 if (TREE_CODE (context) == NAMESPACE_DECL
11673 && DECL_NAME (context) == NULL_TREE)
11677 if (context == NULL)
11678 warning (OPT_Wmissing_declarations,
11679 "no previous declaration for %q+D", decl1);
11687 /* We need to set the DECL_CONTEXT. */
11688 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11689 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11691 fntype = TREE_TYPE (decl1);
11693 /* If #pragma weak applies, mark the decl appropriately now.
11694 The pragma only applies to global functions. Because
11695 determining whether or not the #pragma applies involves
11696 computing the mangled name for the declaration, we cannot
11697 apply the pragma until after we have merged this declaration
11698 with any previous declarations; if the original declaration
11699 has a linkage specification, that specification applies to
11700 the definition as well, and may affect the mangled name. */
11701 if (!DECL_CONTEXT (decl1))
11702 maybe_apply_pragma_weak (decl1);
11705 /* Reset this in case the call to pushdecl changed it. */
11706 current_function_decl = decl1;
11708 gcc_assert (DECL_INITIAL (decl1));
11710 /* This function may already have been parsed, in which case just
11711 return; our caller will skip over the body without parsing. */
11712 if (DECL_INITIAL (decl1) != error_mark_node)
11715 /* Initialize RTL machinery. We cannot do this until
11716 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11717 even when processing a template; this is how we get
11718 CFUN set up, and our per-function variables initialized.
11719 FIXME factor out the non-RTL stuff. */
11720 bl = current_binding_level;
11721 allocate_struct_function (decl1, processing_template_decl);
11723 /* Initialize the language data structures. Whenever we start
11724 a new function, we destroy temporaries in the usual way. */
11725 cfun->language = GGC_CNEW (struct language_function);
11726 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11727 current_binding_level = bl;
11729 /* Even though we're inside a function body, we still don't want to
11730 call expand_expr to calculate the size of a variable-sized array.
11731 We haven't necessarily assigned RTL to all variables yet, so it's
11732 not safe to try to expand expressions involving them. */
11733 cfun->dont_save_pending_sizes_p = 1;
11735 /* Start the statement-tree, start the tree now. */
11736 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11738 /* If we are (erroneously) defining a function that we have already
11739 defined before, wipe out what we knew before. */
11740 if (!DECL_PENDING_INLINE_P (decl1))
11741 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11743 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11745 /* We know that this was set up by `grokclassfn'. We do not
11746 wait until `store_parm_decls', since evil parse errors may
11747 never get us to that point. Here we keep the consistency
11748 between `current_class_type' and `current_class_ptr'. */
11749 tree t = DECL_ARGUMENTS (decl1);
11751 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11752 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11754 cp_function_chain->x_current_class_ref
11755 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11756 cp_function_chain->x_current_class_ptr = t;
11758 /* Constructors and destructors need to know whether they're "in
11759 charge" of initializing virtual base classes. */
11760 t = TREE_CHAIN (t);
11761 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11763 current_in_charge_parm = t;
11764 t = TREE_CHAIN (t);
11766 if (DECL_HAS_VTT_PARM_P (decl1))
11768 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11769 current_vtt_parm = t;
11773 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11774 /* Implicitly-defined methods (like the
11775 destructor for a class in which no destructor
11776 is explicitly declared) must not be defined
11777 until their definition is needed. So, we
11778 ignore interface specifications for
11779 compiler-generated functions. */
11780 && !DECL_ARTIFICIAL (decl1));
11782 if (DECL_INTERFACE_KNOWN (decl1))
11784 tree ctx = decl_function_context (decl1);
11786 if (DECL_NOT_REALLY_EXTERN (decl1))
11787 DECL_EXTERNAL (decl1) = 0;
11789 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11790 && TREE_PUBLIC (ctx))
11791 /* This is a function in a local class in an extern inline
11793 comdat_linkage (decl1);
11795 /* If this function belongs to an interface, it is public.
11796 If it belongs to someone else's interface, it is also external.
11797 This only affects inlines and template instantiations. */
11798 else if (!finfo->interface_unknown && honor_interface)
11800 if (DECL_DECLARED_INLINE_P (decl1)
11801 || DECL_TEMPLATE_INSTANTIATION (decl1)
11802 || processing_template_decl)
11804 DECL_EXTERNAL (decl1)
11805 = (finfo->interface_only
11806 || (DECL_DECLARED_INLINE_P (decl1)
11807 && ! flag_implement_inlines
11808 && !DECL_VINDEX (decl1)));
11810 /* For WIN32 we also want to put these in linkonce sections. */
11811 maybe_make_one_only (decl1);
11814 DECL_EXTERNAL (decl1) = 0;
11815 DECL_INTERFACE_KNOWN (decl1) = 1;
11816 /* If this function is in an interface implemented in this file,
11817 make sure that the back end knows to emit this function
11819 if (!DECL_EXTERNAL (decl1))
11820 mark_needed (decl1);
11822 else if (finfo->interface_unknown && finfo->interface_only
11823 && honor_interface)
11825 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11826 interface, we will have both finfo->interface_unknown and
11827 finfo->interface_only set. In that case, we don't want to
11828 use the normal heuristics because someone will supply a
11829 #pragma implementation elsewhere, and deducing it here would
11830 produce a conflict. */
11831 comdat_linkage (decl1);
11832 DECL_EXTERNAL (decl1) = 0;
11833 DECL_INTERFACE_KNOWN (decl1) = 1;
11834 DECL_DEFER_OUTPUT (decl1) = 1;
11838 /* This is a definition, not a reference.
11839 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11840 if (!GNU_INLINE_P (decl1))
11841 DECL_EXTERNAL (decl1) = 0;
11843 if ((DECL_DECLARED_INLINE_P (decl1)
11844 || DECL_TEMPLATE_INSTANTIATION (decl1))
11845 && ! DECL_INTERFACE_KNOWN (decl1)
11846 /* Don't try to defer nested functions for now. */
11847 && ! decl_function_context (decl1))
11848 DECL_DEFER_OUTPUT (decl1) = 1;
11850 DECL_INTERFACE_KNOWN (decl1) = 1;
11853 /* Determine the ELF visibility attribute for the function. We must not
11854 do this before calling "pushdecl", as we must allow "duplicate_decls"
11855 to merge any attributes appropriately. We also need to wait until
11857 if (!DECL_CLONED_FUNCTION_P (decl1))
11858 determine_visibility (decl1);
11860 begin_scope (sk_function_parms, decl1);
11864 if (DECL_DESTRUCTOR_P (decl1)
11865 || (DECL_CONSTRUCTOR_P (decl1)
11866 && targetm.cxx.cdtor_returns_this ()))
11868 cdtor_label = build_decl (input_location,
11869 LABEL_DECL, NULL_TREE, NULL_TREE);
11870 DECL_CONTEXT (cdtor_label) = current_function_decl;
11873 start_fname_decls ();
11875 store_parm_decls (current_function_parms);
11879 /* Like start_preparsed_function, except that instead of a
11880 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11882 Returns 1 on success. If the DECLARATOR is not suitable for a function
11883 (it defines a datum instead), we return 0, which tells
11884 yyparse to report a parse error. */
11887 start_function (cp_decl_specifier_seq *declspecs,
11888 const cp_declarator *declarator,
11893 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11894 if (decl1 == error_mark_node)
11896 /* If the declarator is not suitable for a function definition,
11897 cause a syntax error. */
11898 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11900 error ("invalid function declaration");
11904 if (DECL_MAIN_P (decl1))
11905 /* main must return int. grokfndecl should have corrected it
11906 (and issued a diagnostic) if the user got it wrong. */
11907 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11908 integer_type_node));
11910 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11915 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11919 use_eh_spec_block (tree fn)
11921 return (flag_exceptions && flag_enforce_eh_specs
11922 && !processing_template_decl
11923 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11924 /* We insert the EH_SPEC_BLOCK only in the original
11925 function; then, it is copied automatically to the
11927 && !DECL_CLONED_FUNCTION_P (fn)
11928 /* Implicitly-generated constructors and destructors have
11929 exception specifications. However, those specifications
11930 are the union of the possible exceptions specified by the
11931 constructors/destructors for bases and members, so no
11932 unallowed exception will ever reach this function. By
11933 not creating the EH_SPEC_BLOCK we save a little memory,
11934 and we avoid spurious warnings about unreachable
11936 && !DECL_ARTIFICIAL (fn));
11939 /* Store the parameter declarations into the current function declaration.
11940 This is called after parsing the parameter declarations, before
11941 digesting the body of the function.
11943 Also install to binding contour return value identifier, if any. */
11946 store_parm_decls (tree current_function_parms)
11948 tree fndecl = current_function_decl;
11951 /* This is a chain of any other decls that came in among the parm
11952 declarations. If a parm is declared with enum {foo, bar} x;
11953 then CONST_DECLs for foo and bar are put here. */
11954 tree nonparms = NULL_TREE;
11956 if (current_function_parms)
11958 /* This case is when the function was defined with an ANSI prototype.
11959 The parms already have decls, so we need not do anything here
11960 except record them as in effect
11961 and complain if any redundant old-style parm decls were written. */
11963 tree specparms = current_function_parms;
11966 /* Must clear this because it might contain TYPE_DECLs declared
11968 current_binding_level->names = NULL;
11970 /* If we're doing semantic analysis, then we'll call pushdecl
11971 for each of these. We must do them in reverse order so that
11972 they end in the correct forward order. */
11973 specparms = nreverse (specparms);
11975 for (parm = specparms; parm; parm = next)
11977 next = TREE_CHAIN (parm);
11978 if (TREE_CODE (parm) == PARM_DECL)
11980 if (DECL_NAME (parm) == NULL_TREE
11981 || TREE_CODE (parm) != VOID_TYPE)
11984 error ("parameter %qD declared void", parm);
11988 /* If we find an enum constant or a type tag,
11989 put it aside for the moment. */
11990 TREE_CHAIN (parm) = NULL_TREE;
11991 nonparms = chainon (nonparms, parm);
11995 /* Get the decls in their original chain order and record in the
11996 function. This is all and only the PARM_DECLs that were
11997 pushed into scope by the loop above. */
11998 DECL_ARGUMENTS (fndecl) = getdecls ();
12001 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12003 /* Now store the final chain of decls for the arguments
12004 as the decl-chain of the current lexical scope.
12005 Put the enumerators in as well, at the front so that
12006 DECL_ARGUMENTS is not modified. */
12007 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12009 if (use_eh_spec_block (current_function_decl))
12010 current_eh_spec_block = begin_eh_spec_block ();
12014 /* We have finished doing semantic analysis on DECL, but have not yet
12015 generated RTL for its body. Save away our current state, so that
12016 when we want to generate RTL later we know what to do. */
12019 save_function_data (tree decl)
12021 struct language_function *f;
12023 /* Save the language-specific per-function data so that we can
12024 get it back when we really expand this function. */
12025 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12028 f = GGC_NEW (struct language_function);
12029 memcpy (f, cp_function_chain, sizeof (struct language_function));
12030 DECL_SAVED_FUNCTION_DATA (decl) = f;
12032 /* Clear out the bits we don't need. */
12033 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12034 f->bindings = NULL;
12035 f->x_local_names = NULL;
12039 /* Set the return value of the constructor (if present). */
12042 finish_constructor_body (void)
12047 if (targetm.cxx.cdtor_returns_this ()
12048 && (! TYPE_FOR_JAVA (current_class_type)))
12050 /* Any return from a constructor will end up here. */
12051 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12053 val = DECL_ARGUMENTS (current_function_decl);
12054 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12055 DECL_RESULT (current_function_decl), val);
12056 /* Return the address of the object. */
12057 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12058 add_stmt (exprstmt);
12062 /* Do all the processing for the beginning of a destructor; set up the
12063 vtable pointers and cleanups for bases and members. */
12066 begin_destructor_body (void)
12068 tree compound_stmt;
12070 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12071 issued an error message. We still want to try to process the
12072 body of the function, but initialize_vtbl_ptrs will crash if
12073 TYPE_BINFO is NULL. */
12074 if (COMPLETE_TYPE_P (current_class_type))
12076 compound_stmt = begin_compound_stmt (0);
12077 /* Make all virtual function table pointers in non-virtual base
12078 classes point to CURRENT_CLASS_TYPE's virtual function
12080 initialize_vtbl_ptrs (current_class_ptr);
12081 finish_compound_stmt (compound_stmt);
12083 /* And insert cleanups for our bases and members so that they
12084 will be properly destroyed if we throw. */
12085 push_base_cleanups ();
12089 /* At the end of every destructor we generate code to delete the object if
12090 necessary. Do that now. */
12093 finish_destructor_body (void)
12097 /* Any return from a destructor will end up here; that way all base
12098 and member cleanups will be run when the function returns. */
12099 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12101 /* In a virtual destructor, we must call delete. */
12102 if (DECL_VIRTUAL_P (current_function_decl))
12105 tree virtual_size = cxx_sizeof (current_class_type);
12109 At the point of definition of a virtual destructor (including
12110 an implicit definition), non-placement operator delete shall
12111 be looked up in the scope of the destructor's class and if
12112 found shall be accessible and unambiguous. */
12113 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12115 /*global_p=*/false,
12116 /*placement=*/NULL_TREE,
12117 /*alloc_fn=*/NULL_TREE);
12119 if_stmt = begin_if_stmt ();
12120 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12121 current_in_charge_parm,
12124 finish_expr_stmt (exprstmt);
12125 finish_then_clause (if_stmt);
12126 finish_if_stmt (if_stmt);
12129 if (targetm.cxx.cdtor_returns_this ())
12133 val = DECL_ARGUMENTS (current_function_decl);
12134 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12135 DECL_RESULT (current_function_decl), val);
12136 /* Return the address of the object. */
12137 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12138 add_stmt (exprstmt);
12142 /* Do the necessary processing for the beginning of a function body, which
12143 in this case includes member-initializers, but not the catch clauses of
12144 a function-try-block. Currently, this means opening a binding level
12145 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12148 begin_function_body (void)
12152 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12155 if (processing_template_decl)
12156 /* Do nothing now. */;
12158 /* Always keep the BLOCK node associated with the outermost pair of
12159 curly braces of a function. These are needed for correct
12160 operation of dwarfout.c. */
12161 keep_next_level (true);
12163 stmt = begin_compound_stmt (BCS_FN_BODY);
12165 if (processing_template_decl)
12166 /* Do nothing now. */;
12167 else if (DECL_DESTRUCTOR_P (current_function_decl))
12168 begin_destructor_body ();
12173 /* Do the processing for the end of a function body. Currently, this means
12174 closing out the cleanups for fully-constructed bases and members, and in
12175 the case of the destructor, deleting the object if desired. Again, this
12176 is only meaningful for [cd]tors, since they are the only functions where
12177 there is a significant distinction between the main body and any
12178 function catch clauses. Handling, say, main() return semantics here
12179 would be wrong, as flowing off the end of a function catch clause for
12180 main() would also need to return 0. */
12183 finish_function_body (tree compstmt)
12185 if (compstmt == NULL_TREE)
12188 /* Close the block. */
12189 finish_compound_stmt (compstmt);
12191 if (processing_template_decl)
12192 /* Do nothing now. */;
12193 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12194 finish_constructor_body ();
12195 else if (DECL_DESTRUCTOR_P (current_function_decl))
12196 finish_destructor_body ();
12199 /* Given a function, returns the BLOCK corresponding to the outermost level
12200 of curly braces, skipping the artificial block created for constructor
12204 outer_curly_brace_block (tree fndecl)
12206 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12207 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12208 /* Skip the artificial function body block. */
12209 block = BLOCK_SUBBLOCKS (block);
12213 /* Finish up a function declaration and compile that function
12214 all the way to assembler language output. The free the storage
12215 for the function definition.
12217 FLAGS is a bitwise or of the following values:
12219 We just finished processing the body of an in-class inline
12220 function definition. (This processing will have taken place
12221 after the class definition is complete.) */
12224 finish_function (int flags)
12226 tree fndecl = current_function_decl;
12227 tree fntype, ctype = NULL_TREE;
12228 int inclass_inline = (flags & 2) != 0;
12231 /* When we get some parse errors, we can end up without a
12232 current_function_decl, so cope. */
12233 if (fndecl == NULL_TREE)
12234 return error_mark_node;
12236 gcc_assert (!defer_mark_used_calls);
12237 defer_mark_used_calls = true;
12239 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12240 && DECL_VIRTUAL_P (fndecl)
12241 && !processing_template_decl)
12243 tree fnclass = DECL_CONTEXT (fndecl);
12244 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12245 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12248 nested = function_depth > 1;
12249 fntype = TREE_TYPE (fndecl);
12251 /* TREE_READONLY (fndecl) = 1;
12252 This caused &foo to be of type ptr-to-const-function
12253 which then got a warning when stored in a ptr-to-function variable. */
12255 gcc_assert (building_stmt_tree ());
12256 /* The current function is being defined, so its DECL_INITIAL should
12257 be set, and unless there's a multiple definition, it should be
12258 error_mark_node. */
12259 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12261 /* For a cloned function, we've already got all the code we need;
12262 there's no need to add any extra bits. */
12263 if (!DECL_CLONED_FUNCTION_P (fndecl))
12265 if (DECL_MAIN_P (current_function_decl))
12269 /* Make it so that `main' always returns 0 by default (or
12272 stmt = finish_return_stmt (integer_one_node);
12274 stmt = finish_return_stmt (integer_zero_node);
12276 /* Hack. We don't want the middle-end to warn that this
12277 return is unreachable, so put the statement on the
12280 location_t linezero = linemap_line_start (line_table, 0, 1);
12281 SET_EXPR_LOCATION (stmt, linezero);
12285 if (use_eh_spec_block (current_function_decl))
12286 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12287 (TREE_TYPE (current_function_decl)),
12288 current_eh_spec_block);
12291 /* If we're saving up tree structure, tie off the function now. */
12292 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12294 finish_fname_decls ();
12296 /* If this function can't throw any exceptions, remember that. */
12297 if (!processing_template_decl
12298 && !cp_function_chain->can_throw
12299 && !flag_non_call_exceptions
12300 && !DECL_REPLACEABLE_P (fndecl))
12301 TREE_NOTHROW (fndecl) = 1;
12303 /* This must come after expand_function_end because cleanups might
12304 have declarations (from inline functions) that need to go into
12305 this function's blocks. */
12307 /* If the current binding level isn't the outermost binding level
12308 for this function, either there is a bug, or we have experienced
12309 syntax errors and the statement tree is malformed. */
12310 if (current_binding_level->kind != sk_function_parms)
12312 /* Make sure we have already experienced errors. */
12313 gcc_assert (errorcount);
12315 /* Throw away the broken statement tree and extra binding
12317 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12319 while (current_binding_level->kind != sk_function_parms)
12321 if (current_binding_level->kind == sk_class)
12322 pop_nested_class ();
12324 poplevel (0, 0, 0);
12327 poplevel (1, 0, 1);
12329 /* Statements should always be full-expressions at the outermost set
12330 of curly braces for a function. */
12331 gcc_assert (stmts_are_full_exprs_p ());
12333 /* Set up the named return value optimization, if we can. Candidate
12334 variables are selected in check_return_expr. */
12335 if (current_function_return_value)
12337 tree r = current_function_return_value;
12340 if (r != error_mark_node
12341 /* This is only worth doing for fns that return in memory--and
12342 simpler, since we don't have to worry about promoted modes. */
12343 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12344 /* Only allow this for variables declared in the outer scope of
12345 the function so we know that their lifetime always ends with a
12346 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12347 we were to do this optimization in tree-ssa. */
12348 && (outer = outer_curly_brace_block (fndecl))
12349 && chain_member (r, BLOCK_VARS (outer)))
12350 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12352 current_function_return_value = NULL_TREE;
12355 /* Remember that we were in class scope. */
12356 if (current_class_name)
12357 ctype = current_class_type;
12359 /* Must mark the RESULT_DECL as being in this function. */
12360 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12362 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12363 to the FUNCTION_DECL node itself. */
12364 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12366 /* Save away current state, if appropriate. */
12367 if (!processing_template_decl)
12368 save_function_data (fndecl);
12370 /* Complain if there's just no return statement. */
12371 if (warn_return_type
12372 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12373 && !dependent_type_p (TREE_TYPE (fntype))
12374 && !current_function_returns_value && !current_function_returns_null
12375 /* Don't complain if we abort or throw. */
12376 && !current_function_returns_abnormally
12377 && !DECL_NAME (DECL_RESULT (fndecl))
12378 && !TREE_NO_WARNING (fndecl)
12379 /* Structor return values (if any) are set by the compiler. */
12380 && !DECL_CONSTRUCTOR_P (fndecl)
12381 && !DECL_DESTRUCTOR_P (fndecl))
12383 warning (OPT_Wreturn_type,
12384 "no return statement in function returning non-void");
12385 TREE_NO_WARNING (fndecl) = 1;
12388 /* Store the end of the function, so that we get good line number
12389 info for the epilogue. */
12390 cfun->function_end_locus = input_location;
12392 /* Genericize before inlining. */
12393 if (!processing_template_decl)
12395 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12396 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12397 cp_genericize (fndecl);
12398 /* Clear out the bits we don't need. */
12399 f->x_current_class_ptr = NULL;
12400 f->x_current_class_ref = NULL;
12401 f->x_eh_spec_block = NULL;
12402 f->x_in_charge_parm = NULL;
12403 f->x_vtt_parm = NULL;
12404 f->x_return_value = NULL;
12405 f->bindings = NULL;
12406 f->extern_decl_map = NULL;
12408 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12409 c_warn_unused_result (gimple_body (fndecl));
12411 /* Clear out the bits we don't need. */
12412 local_names = NULL;
12414 /* We're leaving the context of this function, so zap cfun. It's still in
12415 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12417 current_function_decl = NULL;
12419 /* If this is an in-class inline definition, we may have to pop the
12420 bindings for the template parameters that we added in
12421 maybe_begin_member_template_processing when start_function was
12423 if (inclass_inline)
12424 maybe_end_member_template_processing ();
12426 /* Leave the scope of the class. */
12428 pop_nested_class ();
12434 /* Let the error reporting routines know that we're outside a
12435 function. For a nested function, this value is used in
12436 cxx_pop_function_context and then reset via pop_function_context. */
12437 current_function_decl = NULL_TREE;
12439 defer_mark_used_calls = false;
12440 if (deferred_mark_used_calls)
12445 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12447 VEC_free (tree, gc, deferred_mark_used_calls);
12453 /* Create the FUNCTION_DECL for a function definition.
12454 DECLSPECS and DECLARATOR are the parts of the declaration;
12455 they describe the return type and the name of the function,
12456 but twisted together in a fashion that parallels the syntax of C.
12458 This function creates a binding context for the function body
12459 as well as setting up the FUNCTION_DECL in current_function_decl.
12461 Returns a FUNCTION_DECL on success.
12463 If the DECLARATOR is not suitable for a function (it defines a datum
12464 instead), we return 0, which tells yyparse to report a parse error.
12466 May return void_type_node indicating that this method is actually
12467 a friend. See grokfield for more details.
12469 Came here with a `.pushlevel' .
12471 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12472 CHANGES TO CODE IN `grokfield'. */
12475 start_method (cp_decl_specifier_seq *declspecs,
12476 const cp_declarator *declarator, tree attrlist)
12478 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12481 if (fndecl == error_mark_node)
12482 return error_mark_node;
12484 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12486 error ("invalid member function declaration");
12487 return error_mark_node;
12491 cplus_decl_attributes (&fndecl, attrlist, 0);
12493 /* Pass friends other than inline friend functions back. */
12494 if (fndecl == void_type_node)
12497 if (DECL_IN_AGGR_P (fndecl))
12499 if (DECL_CONTEXT (fndecl)
12500 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12501 error ("%qD is already defined in class %qT", fndecl,
12502 DECL_CONTEXT (fndecl));
12503 return error_mark_node;
12506 check_template_shadow (fndecl);
12508 DECL_DECLARED_INLINE_P (fndecl) = 1;
12509 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12511 /* We process method specializations in finish_struct_1. */
12512 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12514 fndecl = push_template_decl (fndecl);
12515 if (fndecl == error_mark_node)
12519 if (! DECL_FRIEND_P (fndecl))
12521 if (TREE_CHAIN (fndecl))
12523 fndecl = copy_node (fndecl);
12524 TREE_CHAIN (fndecl) = NULL_TREE;
12528 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12530 /* Make a place for the parms. */
12531 begin_scope (sk_function_parms, fndecl);
12533 DECL_IN_AGGR_P (fndecl) = 1;
12537 /* Go through the motions of finishing a function definition.
12538 We don't compile this method until after the whole class has
12541 FINISH_METHOD must return something that looks as though it
12542 came from GROKFIELD (since we are defining a method, after all).
12544 This is called after parsing the body of the function definition.
12545 STMTS is the chain of statements that makes up the function body.
12547 DECL is the ..._DECL that `start_method' provided. */
12550 finish_method (tree decl)
12552 tree fndecl = decl;
12557 if (decl == void_type_node)
12560 old_initial = DECL_INITIAL (fndecl);
12562 /* Undo the level for the parms (from start_method).
12563 This is like poplevel, but it causes nothing to be
12564 saved. Saving information here confuses symbol-table
12565 output routines. Besides, this information will
12566 be correctly output when this method is actually
12569 /* Clear out the meanings of the local variables of this level;
12570 also record in each decl which block it belongs to. */
12572 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12574 if (DECL_NAME (link) != NULL_TREE)
12575 pop_binding (DECL_NAME (link), link);
12576 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12577 DECL_CONTEXT (link) = NULL_TREE;
12580 poplevel (0, 0, 0);
12582 DECL_INITIAL (fndecl) = old_initial;
12584 /* We used to check if the context of FNDECL was different from
12585 current_class_type as another way to get inside here. This didn't work
12586 for String.cc in libg++. */
12587 if (DECL_FRIEND_P (fndecl))
12589 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12591 decl = void_type_node;
12598 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12599 we can lay it out later, when and if its type becomes complete. */
12602 maybe_register_incomplete_var (tree var)
12604 gcc_assert (TREE_CODE (var) == VAR_DECL);
12606 /* Keep track of variables with incomplete types. */
12607 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12608 && DECL_EXTERNAL (var))
12610 tree inner_type = TREE_TYPE (var);
12612 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12613 inner_type = TREE_TYPE (inner_type);
12614 inner_type = TYPE_MAIN_VARIANT (inner_type);
12616 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12617 /* RTTI TD entries are created while defining the type_info. */
12618 || (TYPE_LANG_SPECIFIC (inner_type)
12619 && TYPE_BEING_DEFINED (inner_type)))
12620 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12624 /* Called when a class type (given by TYPE) is defined. If there are
12625 any existing VAR_DECLs whose type has been completed by this
12626 declaration, update them now. */
12629 complete_vars (tree type)
12631 tree *list = &incomplete_vars;
12633 gcc_assert (CLASS_TYPE_P (type));
12636 if (same_type_p (type, TREE_PURPOSE (*list)))
12638 tree var = TREE_VALUE (*list);
12639 tree type = TREE_TYPE (var);
12640 /* Complete the type of the variable. The VAR_DECL itself
12641 will be laid out in expand_expr. */
12642 complete_type (type);
12643 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12644 /* Remove this entry from the list. */
12645 *list = TREE_CHAIN (*list);
12648 list = &TREE_CHAIN (*list);
12651 /* Check for pending declarations which may have abstract type. */
12652 complete_type_check_abstract (type);
12655 /* If DECL is of a type which needs a cleanup, build and return an
12656 expression to perform that cleanup here. Return NULL_TREE if no
12657 cleanup need be done. */
12660 cxx_maybe_build_cleanup (tree decl)
12666 /* Assume no cleanup is required. */
12667 cleanup = NULL_TREE;
12669 if (error_operand_p (decl))
12672 /* Handle "__attribute__((cleanup))". We run the cleanup function
12673 before the destructor since the destructor is what actually
12674 terminates the lifetime of the object. */
12675 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12682 /* Get the name specified by the user for the cleanup function. */
12683 id = TREE_VALUE (TREE_VALUE (attr));
12684 /* Look up the name to find the cleanup function to call. It is
12685 important to use lookup_name here because that is what is
12686 used in c-common.c:handle_cleanup_attribute when performing
12687 initial checks on the attribute. Note that those checks
12688 include ensuring that the function found is not an overloaded
12689 function, or an object with an overloaded call operator,
12690 etc.; we can rely on the fact that the function found is an
12691 ordinary FUNCTION_DECL. */
12692 fn = lookup_name (id);
12693 arg = build_address (decl);
12695 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12697 tf_warning_or_error);
12699 /* Handle ordinary C++ destructors. */
12700 type = TREE_TYPE (decl);
12701 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12703 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12704 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12705 && CLASSTYPE_VBASECLASSES (type));
12709 if (TREE_CODE (type) == ARRAY_TYPE)
12712 addr = build_address (decl);
12714 /* Optimize for space over speed here. */
12715 if (!has_vbases || flag_expensive_optimizations)
12716 flags |= LOOKUP_NONVIRTUAL;
12718 call = build_delete (TREE_TYPE (addr), addr,
12719 sfk_complete_destructor, flags, 0);
12721 cleanup = build_compound_expr (input_location, cleanup, call);
12729 /* When a stmt has been parsed, this function is called. */
12736 /* DECL was originally constructed as a non-static member function,
12737 but turned out to be static. Update it accordingly. */
12740 revert_static_member_fn (tree decl)
12743 tree function = TREE_TYPE (decl);
12744 tree args = TYPE_ARG_TYPES (function);
12746 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12747 != TYPE_UNQUALIFIED)
12748 error ("static member function %q#D declared with type qualifiers", decl);
12750 args = TREE_CHAIN (args);
12751 tmp = build_function_type (TREE_TYPE (function), args);
12752 tmp = build_qualified_type (tmp, cp_type_quals (function));
12753 tmp = build_exception_variant (tmp,
12754 TYPE_RAISES_EXCEPTIONS (function));
12755 TREE_TYPE (decl) = tmp;
12756 if (DECL_ARGUMENTS (decl))
12757 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12758 DECL_STATIC_FUNCTION_P (decl) = 1;
12761 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12762 one of the language-independent trees. */
12764 enum cp_tree_node_structure_enum
12765 cp_tree_node_structure (union lang_tree_node * t)
12767 switch (TREE_CODE (&t->generic))
12769 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12770 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12771 case OVERLOAD: return TS_CP_OVERLOAD;
12772 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12773 case PTRMEM_CST: return TS_CP_PTRMEM;
12774 case BASELINK: return TS_CP_BASELINK;
12775 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12776 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12777 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12778 default: return TS_CP_GENERIC;
12782 /* Build the void_list_node (void_type_node having been created). */
12784 build_void_list_node (void)
12786 tree t = build_tree_list (NULL_TREE, void_type_node);
12791 cp_missing_noreturn_ok_p (tree decl)
12793 /* A missing noreturn is ok for the `main' function. */
12794 return DECL_MAIN_P (decl);
12797 /* Return the COMDAT group into which DECL should be placed. */
12800 cxx_comdat_group (tree decl)
12804 /* Virtual tables, construction virtual tables, and virtual table
12805 tables all go in a single COMDAT group, named after the primary
12807 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12808 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12809 /* For all other DECLs, the COMDAT group is the mangled name of the
12810 declaration itself. */
12813 while (DECL_THUNK_P (decl))
12815 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12816 into the same section as the target function. In that case
12817 we must return target's name. */
12818 tree target = THUNK_TARGET (decl);
12819 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12820 && DECL_SECTION_NAME (target) != NULL
12821 && DECL_ONE_ONLY (target))
12826 name = DECL_ASSEMBLER_NAME (decl);
12832 #include "gt-cp-decl.h"