1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
920 && ! (DECL_EXTERN_C_P (newdecl)
921 && DECL_EXTERN_C_P (olddecl)))
924 if (TREE_CODE (f1) != TREE_CODE (f2))
927 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
929 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
930 && (DECL_BUILT_IN (olddecl)
931 #ifndef NO_IMPLICIT_EXTERN_C
932 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
933 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
937 types_match = self_promoting_args_p (p1);
938 if (p1 == void_list_node)
939 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
941 #ifndef NO_IMPLICIT_EXTERN_C
942 else if (p1 == NULL_TREE
943 && (DECL_EXTERN_C_P (olddecl)
944 && DECL_IN_SYSTEM_HEADER (olddecl)
945 && !DECL_CLASS_SCOPE_P (olddecl))
946 && (DECL_EXTERN_C_P (newdecl)
947 && DECL_IN_SYSTEM_HEADER (newdecl)
948 && !DECL_CLASS_SCOPE_P (newdecl)))
950 types_match = self_promoting_args_p (p2);
951 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 types_match = compparms (p1, p2);
960 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
962 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
963 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
966 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
967 DECL_TEMPLATE_PARMS (olddecl)))
970 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
971 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
972 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
974 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
975 DECL_TEMPLATE_RESULT (newdecl));
979 /* Need to check scope for variable declaration (VAR_DECL).
980 For typedef (TYPE_DECL), scope is ignored. */
981 if (TREE_CODE (newdecl) == VAR_DECL
982 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
984 Two declarations for an object with C language linkage
985 with the same name (ignoring the namespace that qualify
986 it) that appear in different namespace scopes refer to
988 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
991 if (TREE_TYPE (newdecl) == error_mark_node)
992 types_match = TREE_TYPE (olddecl) == error_mark_node;
993 else if (TREE_TYPE (olddecl) == NULL_TREE)
994 types_match = TREE_TYPE (newdecl) == NULL_TREE;
995 else if (TREE_TYPE (newdecl) == NULL_TREE)
998 types_match = comptypes (TREE_TYPE (newdecl),
1000 COMPARE_REDECLARATION);
1006 /* If NEWDECL is `static' and an `extern' was seen previously,
1007 warn about it. OLDDECL is the previous declaration.
1009 Note that this does not apply to the C++ case of declaring
1010 a variable `extern const' and then later `const'.
1012 Don't complain about built-in functions, since they are beyond
1013 the user's control. */
1016 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1020 if (TREE_CODE (newdecl) == TYPE_DECL
1021 || TREE_CODE (newdecl) == TEMPLATE_DECL
1022 || TREE_CODE (newdecl) == CONST_DECL
1023 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1026 /* Don't get confused by static member functions; that's a different
1028 if (TREE_CODE (newdecl) == FUNCTION_DECL
1029 && DECL_STATIC_FUNCTION_P (newdecl))
1032 /* If the old declaration was `static', or the new one isn't, then
1033 then everything is OK. */
1034 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1037 /* It's OK to declare a builtin function as `static'. */
1038 if (TREE_CODE (olddecl) == FUNCTION_DECL
1039 && DECL_ARTIFICIAL (olddecl))
1042 name = DECL_ASSEMBLER_NAME (newdecl);
1043 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1044 permerror (input_location, "previous declaration of %q+D", olddecl);
1047 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1048 function templates. If their exception specifications do not
1049 match, issue a diagnostic. */
1052 check_redeclaration_exception_specification (tree new_decl,
1057 tree new_exceptions;
1058 tree old_exceptions;
1060 new_type = TREE_TYPE (new_decl);
1061 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1062 old_type = TREE_TYPE (old_decl);
1063 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1067 If any declaration of a function has an exception-specification,
1068 all declarations, including the definition and an explicit
1069 specialization, of that function shall have an
1070 exception-specification with the same set of type-ids. */
1071 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1072 && ! DECL_IS_BUILTIN (old_decl)
1074 && !comp_except_specs (new_exceptions, old_exceptions,
1077 error ("declaration of %qF throws different exceptions", new_decl);
1078 error ("from previous declaration %q+F", old_decl);
1082 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1083 && lookup_attribute ("gnu_inline", \
1084 DECL_ATTRIBUTES (fn)))
1086 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1087 If the redeclaration is invalid, a diagnostic is issued, and the
1088 error_mark_node is returned. Otherwise, OLDDECL is returned.
1090 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1093 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1096 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1098 unsigned olddecl_uid = DECL_UID (olddecl);
1099 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1100 int new_defines_function = 0;
1103 if (newdecl == olddecl)
1106 types_match = decls_match (newdecl, olddecl);
1108 /* If either the type of the new decl or the type of the old decl is an
1109 error_mark_node, then that implies that we have already issued an
1110 error (earlier) for some bogus type specification, and in that case,
1111 it is rather pointless to harass the user with yet more error message
1112 about the same declaration, so just pretend the types match here. */
1113 if (TREE_TYPE (newdecl) == error_mark_node
1114 || TREE_TYPE (olddecl) == error_mark_node)
1115 return error_mark_node;
1117 if (DECL_P (olddecl)
1118 && TREE_CODE (newdecl) == FUNCTION_DECL
1119 && TREE_CODE (olddecl) == FUNCTION_DECL
1120 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1122 if (DECL_DECLARED_INLINE_P (newdecl)
1123 && DECL_UNINLINABLE (newdecl)
1124 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1125 /* Already warned elsewhere. */;
1126 else if (DECL_DECLARED_INLINE_P (olddecl)
1127 && DECL_UNINLINABLE (olddecl)
1128 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1129 /* Already warned. */;
1130 else if (DECL_DECLARED_INLINE_P (newdecl)
1131 && DECL_UNINLINABLE (olddecl)
1132 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1134 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1136 warning (OPT_Wattributes, "previous declaration of %q+D "
1137 "with attribute noinline", olddecl);
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (newdecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1143 warning (OPT_Wattributes, "function %q+D redeclared with "
1144 "attribute noinline", newdecl);
1145 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1150 /* Check for redeclaration and other discrepancies. */
1151 if (TREE_CODE (olddecl) == FUNCTION_DECL
1152 && DECL_ARTIFICIAL (olddecl))
1154 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1155 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1157 /* Avoid warnings redeclaring built-ins which have not been
1158 explicitly declared. */
1159 if (DECL_ANTICIPATED (olddecl))
1162 /* If you declare a built-in or predefined function name as static,
1163 the old definition is overridden, but optionally warn this was a
1164 bad choice of name. */
1165 if (! TREE_PUBLIC (newdecl))
1167 warning (OPT_Wshadow, "shadowing %s function %q#D",
1168 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1170 /* Discard the old built-in function. */
1173 /* If the built-in is not ansi, then programs can override
1174 it even globally without an error. */
1175 else if (! DECL_BUILT_IN (olddecl))
1176 warning (0, "library function %q#D redeclared as non-function %q#D",
1180 error ("declaration of %q#D", newdecl);
1181 error ("conflicts with built-in declaration %q#D",
1186 else if (!types_match)
1188 /* Avoid warnings redeclaring built-ins which have not been
1189 explicitly declared. */
1190 if (DECL_ANTICIPATED (olddecl))
1192 /* Deal with fileptr_type_node. FILE type is not known
1193 at the time we create the builtins. */
1196 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1197 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1199 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1202 else if (TREE_VALUE (t2) == fileptr_type_node)
1204 tree t = TREE_VALUE (t1);
1206 if (TREE_CODE (t) == POINTER_TYPE
1207 && TYPE_NAME (TREE_TYPE (t))
1208 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1209 == get_identifier ("FILE")
1210 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1212 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1215 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1216 types_match = decls_match (newdecl, olddecl);
1218 return duplicate_decls (newdecl, olddecl,
1220 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1223 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1226 else if ((DECL_EXTERN_C_P (newdecl)
1227 && DECL_EXTERN_C_P (olddecl))
1228 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1231 /* A near match; override the builtin. */
1233 if (TREE_PUBLIC (newdecl))
1235 warning (0, "new declaration %q#D", newdecl);
1236 warning (0, "ambiguates built-in declaration %q#D",
1240 warning (OPT_Wshadow, "shadowing %s function %q#D",
1241 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1245 /* Discard the old built-in function. */
1248 /* Replace the old RTL to avoid problems with inlining. */
1249 COPY_DECL_RTL (newdecl, olddecl);
1251 /* Even if the types match, prefer the new declarations type for
1252 built-ins which have not been explicitly declared, for
1253 exception lists, etc... */
1254 else if (DECL_ANTICIPATED (olddecl))
1256 tree type = TREE_TYPE (newdecl);
1257 tree attribs = (*targetm.merge_type_attributes)
1258 (TREE_TYPE (olddecl), type);
1260 type = cp_build_type_attribute_variant (type, attribs);
1261 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1264 /* If a function is explicitly declared "throw ()", propagate that to
1265 the corresponding builtin. */
1266 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1267 && DECL_ANTICIPATED (olddecl)
1268 && TREE_NOTHROW (newdecl)
1269 && !TREE_NOTHROW (olddecl)
1270 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1271 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1273 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1275 /* Whether or not the builtin can throw exceptions has no
1276 bearing on this declarator. */
1277 TREE_NOTHROW (olddecl) = 0;
1279 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1281 /* If a builtin function is redeclared as `static', merge
1282 the declarations, but make the original one static. */
1283 DECL_THIS_STATIC (olddecl) = 1;
1284 TREE_PUBLIC (olddecl) = 0;
1286 /* Make the old declaration consistent with the new one so
1287 that all remnants of the builtin-ness of this function
1288 will be banished. */
1289 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1290 COPY_DECL_RTL (newdecl, olddecl);
1293 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1295 /* C++ Standard, 3.3, clause 4:
1296 "[Note: a namespace name or a class template name must be unique
1297 in its declarative region (7.3.2, clause 14). ]" */
1298 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1299 && TREE_CODE (newdecl) != NAMESPACE_DECL
1300 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1301 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1302 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1303 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1305 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1306 && TREE_CODE (newdecl) != TYPE_DECL)
1307 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1308 && TREE_CODE (olddecl) != TYPE_DECL))
1310 /* We do nothing special here, because C++ does such nasty
1311 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1312 get shadowed, and know that if we need to find a TYPE_DECL
1313 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1314 slot of the identifier. */
1318 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1319 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1320 || (TREE_CODE (olddecl) == FUNCTION_DECL
1321 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1325 error ("%q#D redeclared as different kind of symbol", newdecl);
1326 if (TREE_CODE (olddecl) == TREE_LIST)
1327 olddecl = TREE_VALUE (olddecl);
1328 error ("previous declaration of %q+#D", olddecl);
1330 return error_mark_node;
1332 else if (!types_match)
1334 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1335 /* These are certainly not duplicate declarations; they're
1336 from different scopes. */
1339 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1341 /* The name of a class template may not be declared to refer to
1342 any other template, class, function, object, namespace, value,
1343 or type in the same scope. */
1344 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1345 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1347 error ("declaration of template %q#D", newdecl);
1348 error ("conflicts with previous declaration %q+#D", olddecl);
1350 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1351 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1352 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1353 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1354 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1355 DECL_TEMPLATE_PARMS (olddecl))
1356 /* Template functions can be disambiguated by
1358 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1359 TREE_TYPE (TREE_TYPE (olddecl))))
1361 error ("new declaration %q#D", newdecl);
1362 error ("ambiguates old declaration %q+#D", olddecl);
1366 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1368 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1370 error ("declaration of C function %q#D conflicts with",
1372 error ("previous declaration %q+#D here", olddecl);
1374 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1377 error ("new declaration %q#D", newdecl);
1378 error ("ambiguates old declaration %q+#D", olddecl);
1379 return error_mark_node;
1386 error ("conflicting declaration %q#D", newdecl);
1387 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1388 return error_mark_node;
1391 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1392 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1393 && (!DECL_TEMPLATE_INFO (newdecl)
1394 || (DECL_TI_TEMPLATE (newdecl)
1395 != DECL_TI_TEMPLATE (olddecl))))
1396 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1397 && (!DECL_TEMPLATE_INFO (olddecl)
1398 || (DECL_TI_TEMPLATE (olddecl)
1399 != DECL_TI_TEMPLATE (newdecl))))))
1400 /* It's OK to have a template specialization and a non-template
1401 with the same type, or to have specializations of two
1402 different templates with the same type. Note that if one is a
1403 specialization, and the other is an instantiation of the same
1404 template, that we do not exit at this point. That situation
1405 can occur if we instantiate a template class, and then
1406 specialize one of its methods. This situation is valid, but
1407 the declarations must be merged in the usual way. */
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1411 && !DECL_USE_TEMPLATE (newdecl))
1412 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1413 && !DECL_USE_TEMPLATE (olddecl))))
1414 /* One of the declarations is a template instantiation, and the
1415 other is not a template at all. That's OK. */
1417 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1419 /* In [namespace.alias] we have:
1421 In a declarative region, a namespace-alias-definition can be
1422 used to redefine a namespace-alias declared in that declarative
1423 region to refer only to the namespace to which it already
1426 Therefore, if we encounter a second alias directive for the same
1427 alias, we can just ignore the second directive. */
1428 if (DECL_NAMESPACE_ALIAS (newdecl)
1429 && (DECL_NAMESPACE_ALIAS (newdecl)
1430 == DECL_NAMESPACE_ALIAS (olddecl)))
1432 /* [namespace.alias]
1434 A namespace-name or namespace-alias shall not be declared as
1435 the name of any other entity in the same declarative region.
1436 A namespace-name defined at global scope shall not be
1437 declared as the name of any other entity in any global scope
1439 error ("declaration of namespace %qD conflicts with", newdecl);
1440 error ("previous declaration of namespace %q+D here", olddecl);
1441 return error_mark_node;
1445 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1448 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1449 if (DECL_NAME (olddecl) != NULL_TREE)
1450 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1451 ? "%q+#D previously defined here"
1452 : "%q+#D previously declared here", olddecl);
1453 return error_mark_node;
1455 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1456 && DECL_INITIAL (olddecl) != NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1458 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1460 /* Prototype decl follows defn w/o prototype. */
1461 warning (0, "prototype for %q+#D", newdecl);
1462 warning (0, "%Jfollows non-prototype definition here", olddecl);
1464 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1465 || TREE_CODE (olddecl) == VAR_DECL)
1466 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1469 If two declarations of the same function or object
1470 specify different linkage-specifications ..., the program
1471 is ill-formed.... Except for functions with C++ linkage,
1472 a function declaration without a linkage specification
1473 shall not precede the first linkage specification for
1474 that function. A function can be declared without a
1475 linkage specification after an explicit linkage
1476 specification has been seen; the linkage explicitly
1477 specified in the earlier declaration is not affected by
1478 such a function declaration.
1480 DR 563 raises the question why the restrictions on
1481 functions should not also apply to objects. Older
1482 versions of G++ silently ignore the linkage-specification
1490 which is clearly wrong. Therefore, we now treat objects
1492 if (current_lang_depth () == 0)
1494 /* There is no explicit linkage-specification, so we use
1495 the linkage from the previous declaration. */
1496 if (!DECL_LANG_SPECIFIC (newdecl))
1497 retrofit_lang_decl (newdecl);
1498 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1502 error ("previous declaration of %q+#D with %qL linkage",
1503 olddecl, DECL_LANGUAGE (olddecl));
1504 error ("conflicts with new declaration with %qL linkage",
1505 DECL_LANGUAGE (newdecl));
1509 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1511 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1513 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1514 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1517 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1518 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1520 for (; t1 && t1 != void_list_node;
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1522 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1524 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1527 permerror (input_location, "default argument given for parameter %d of %q#D",
1529 permerror (input_location, "after previous specification in %q+#D", olddecl);
1533 error ("default argument given for parameter %d of %q#D",
1535 error ("after previous specification in %q+#D",
1542 /* Do not merge an implicit typedef with an explicit one. In:
1546 typedef class A A __attribute__ ((foo));
1548 the attribute should apply only to the typedef. */
1549 if (TREE_CODE (olddecl) == TYPE_DECL
1550 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1551 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1554 /* If new decl is `static' and an `extern' was seen previously,
1556 warn_extern_redeclared_static (newdecl, olddecl);
1558 /* We have committed to returning 1 at this point. */
1559 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1561 /* Now that functions must hold information normally held
1562 by field decls, there is extra work to do so that
1563 declaration information does not get destroyed during
1565 if (DECL_VINDEX (olddecl))
1566 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1567 if (DECL_CONTEXT (olddecl))
1568 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1569 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1570 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1571 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1572 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1573 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1594 if (DECL_DELETED_FN (newdecl))
1596 error ("deleted definition of %qD", newdecl);
1597 error ("after previous declaration %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 DECL_ATTRIBUTES (old_result)
1632 = (*targetm.merge_decl_attributes) (old_result, new_result);
1634 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1636 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1637 && DECL_INITIAL (new_result))
1639 if (DECL_INITIAL (old_result))
1640 DECL_UNINLINABLE (old_result) = 1;
1642 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1643 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1644 DECL_NOT_REALLY_EXTERN (old_result)
1645 = DECL_NOT_REALLY_EXTERN (new_result);
1646 DECL_INTERFACE_KNOWN (old_result)
1647 = DECL_INTERFACE_KNOWN (new_result);
1648 DECL_DECLARED_INLINE_P (old_result)
1649 = DECL_DECLARED_INLINE_P (new_result);
1650 DECL_DISREGARD_INLINE_LIMITS (old_result)
1651 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1656 DECL_DECLARED_INLINE_P (old_result)
1657 |= DECL_DECLARED_INLINE_P (new_result);
1658 DECL_DISREGARD_INLINE_LIMITS (old_result)
1659 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1660 check_redeclaration_exception_specification (newdecl, olddecl);
1664 /* If the new declaration is a definition, update the file and
1665 line information on the declaration, and also make
1666 the old declaration the same definition. */
1667 if (DECL_INITIAL (new_result) != NULL_TREE)
1669 DECL_SOURCE_LOCATION (olddecl)
1670 = DECL_SOURCE_LOCATION (old_result)
1671 = DECL_SOURCE_LOCATION (newdecl);
1672 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1673 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1676 DECL_ARGUMENTS (old_result)
1677 = DECL_ARGUMENTS (new_result);
1678 for (parm = DECL_ARGUMENTS (old_result); parm;
1679 parm = TREE_CHAIN (parm))
1680 DECL_CONTEXT (parm) = old_result;
1689 /* Automatically handles default parameters. */
1690 tree oldtype = TREE_TYPE (olddecl);
1693 /* Merge the data types specified in the two decls. */
1694 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1696 /* If merge_types produces a non-typedef type, just use the old type. */
1697 if (TREE_CODE (newdecl) == TYPE_DECL
1698 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1701 if (TREE_CODE (newdecl) == VAR_DECL)
1703 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1704 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1705 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1706 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1707 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1708 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1710 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1711 if (DECL_LANG_SPECIFIC (olddecl)
1712 && CP_DECL_THREADPRIVATE_P (olddecl))
1714 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1715 if (!DECL_LANG_SPECIFIC (newdecl))
1716 retrofit_lang_decl (newdecl);
1718 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1719 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1723 /* Do this after calling `merge_types' so that default
1724 parameters don't confuse us. */
1725 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1726 check_redeclaration_exception_specification (newdecl, olddecl);
1727 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1729 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1730 check_default_args (newdecl);
1732 /* Lay the type out, unless already done. */
1733 if (! same_type_p (newtype, oldtype)
1734 && TREE_TYPE (newdecl) != error_mark_node
1735 && !(processing_template_decl && uses_template_parms (newdecl)))
1736 layout_type (TREE_TYPE (newdecl));
1738 if ((TREE_CODE (newdecl) == VAR_DECL
1739 || TREE_CODE (newdecl) == PARM_DECL
1740 || TREE_CODE (newdecl) == RESULT_DECL
1741 || TREE_CODE (newdecl) == FIELD_DECL
1742 || TREE_CODE (newdecl) == TYPE_DECL)
1743 && !(processing_template_decl && uses_template_parms (newdecl)))
1744 layout_decl (newdecl, 0);
1746 /* Merge the type qualifiers. */
1747 if (TREE_READONLY (newdecl))
1748 TREE_READONLY (olddecl) = 1;
1749 if (TREE_THIS_VOLATILE (newdecl))
1750 TREE_THIS_VOLATILE (olddecl) = 1;
1751 if (TREE_NOTHROW (newdecl))
1752 TREE_NOTHROW (olddecl) = 1;
1754 /* Merge deprecatedness. */
1755 if (TREE_DEPRECATED (newdecl))
1756 TREE_DEPRECATED (olddecl) = 1;
1758 /* Preserve function specific target and optimization options */
1759 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1761 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1762 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1763 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1764 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1766 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1767 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1768 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1769 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1772 /* Merge the initialization information. */
1773 if (DECL_INITIAL (newdecl) == NULL_TREE
1774 && DECL_INITIAL (olddecl) != NULL_TREE)
1776 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1777 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1778 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1779 && DECL_LANG_SPECIFIC (newdecl)
1780 && DECL_LANG_SPECIFIC (olddecl))
1782 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1783 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1787 /* Merge the section attribute.
1788 We want to issue an error if the sections conflict but that must be
1789 done later in decl_attributes since we are called before attributes
1791 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1792 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1794 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1796 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1797 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1798 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1799 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1800 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1801 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1802 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1803 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1804 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1805 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1806 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1807 /* Keep the old RTL. */
1808 COPY_DECL_RTL (olddecl, newdecl);
1810 else if (TREE_CODE (newdecl) == VAR_DECL
1811 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1813 /* Keep the old RTL. We cannot keep the old RTL if the old
1814 declaration was for an incomplete object and the new
1815 declaration is not since many attributes of the RTL will
1817 COPY_DECL_RTL (olddecl, newdecl);
1820 /* If cannot merge, then use the new type and qualifiers,
1821 and don't preserve the old rtl. */
1824 /* Clean out any memory we had of the old declaration. */
1825 tree oldstatic = value_member (olddecl, static_aggregates);
1827 TREE_VALUE (oldstatic) = error_mark_node;
1829 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1830 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1831 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1832 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1835 /* Merge the storage class information. */
1836 merge_weak (newdecl, olddecl);
1838 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1839 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1840 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1841 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1842 if (! DECL_EXTERNAL (olddecl))
1843 DECL_EXTERNAL (newdecl) = 0;
1845 new_template = NULL_TREE;
1846 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1848 bool new_redefines_gnu_inline = false;
1850 if (new_defines_function
1851 && ((DECL_INTERFACE_KNOWN (olddecl)
1852 && TREE_CODE (olddecl) == FUNCTION_DECL)
1853 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1854 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1855 == FUNCTION_DECL))))
1859 if (TREE_CODE (fn) == TEMPLATE_DECL)
1860 fn = DECL_TEMPLATE_RESULT (olddecl);
1862 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1865 if (!new_redefines_gnu_inline)
1867 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1868 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1869 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1871 DECL_TEMPLATE_INSTANTIATED (newdecl)
1872 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1874 /* If the OLDDECL is an instantiation and/or specialization,
1875 then the NEWDECL must be too. But, it may not yet be marked
1876 as such if the caller has created NEWDECL, but has not yet
1877 figured out that it is a redeclaration. */
1878 if (!DECL_USE_TEMPLATE (newdecl))
1879 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1881 /* Don't really know how much of the language-specific
1882 values we should copy from old to new. */
1883 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1884 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1885 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1886 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1887 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1888 if (DECL_TEMPLATE_INFO (newdecl))
1889 new_template = DECL_TI_TEMPLATE (newdecl);
1890 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1891 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1892 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1893 olddecl_friend = DECL_FRIEND_P (olddecl);
1894 hidden_friend = (DECL_ANTICIPATED (olddecl)
1895 && DECL_HIDDEN_FRIEND_P (olddecl)
1896 && newdecl_is_friend);
1898 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1899 if (TREE_CODE (newdecl) == FUNCTION_DECL
1900 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1902 DECL_BEFRIENDING_CLASSES (newdecl)
1903 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1904 DECL_BEFRIENDING_CLASSES (olddecl));
1905 /* DECL_THUNKS is only valid for virtual functions,
1906 otherwise it is a DECL_FRIEND_CONTEXT. */
1907 if (DECL_VIRTUAL_P (newdecl))
1908 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1916 /* Merge parameter attributes. */
1917 tree oldarg, newarg;
1918 for (oldarg = DECL_ARGUMENTS(olddecl),
1919 newarg = DECL_ARGUMENTS(newdecl);
1921 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1922 DECL_ATTRIBUTES (newarg)
1923 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1924 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1927 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1928 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1930 /* If newdecl is not a specialization, then it is not a
1931 template-related function at all. And that means that we
1932 should have exited above, returning 0. */
1933 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1935 if (TREE_USED (olddecl))
1936 /* From [temp.expl.spec]:
1938 If a template, a member template or the member of a class
1939 template is explicitly specialized then that
1940 specialization shall be declared before the first use of
1941 that specialization that would cause an implicit
1942 instantiation to take place, in every translation unit in
1943 which such a use occurs. */
1944 error ("explicit specialization of %qD after first use",
1947 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1949 /* Don't propagate visibility from the template to the
1950 specialization here. We'll do that in determine_visibility if
1952 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1954 /* [temp.expl.spec/14] We don't inline explicit specialization
1955 just because the primary template says so. */
1957 else if (new_defines_function && DECL_INITIAL (olddecl))
1959 /* Never inline re-defined extern inline functions.
1960 FIXME: this could be better handled by keeping both
1961 function as separate declarations. */
1962 DECL_UNINLINABLE (newdecl) = 1;
1966 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1967 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1969 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1971 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1972 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1974 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1975 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1976 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1977 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1980 /* Preserve abstractness on cloned [cd]tors. */
1981 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1983 /* Update newdecl's parms to point at olddecl. */
1984 for (parm = DECL_ARGUMENTS (newdecl); parm;
1985 parm = TREE_CHAIN (parm))
1986 DECL_CONTEXT (parm) = olddecl;
1990 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1991 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1992 COPY_DECL_RTL (newdecl, olddecl);
1994 if (! types_match || new_defines_function)
1996 /* These need to be copied so that the names are available.
1997 Note that if the types do match, we'll preserve inline
1998 info and other bits, but if not, we won't. */
1999 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2000 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2002 if (new_defines_function)
2003 /* If defining a function declared with other language
2004 linkage, use the previously declared language linkage. */
2005 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2006 else if (types_match)
2008 /* If redeclaring a builtin function, and not a definition,
2009 it stays built in. */
2010 if (DECL_BUILT_IN (olddecl))
2012 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2013 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2014 /* If we're keeping the built-in definition, keep the rtl,
2015 regardless of declaration matches. */
2016 COPY_DECL_RTL (olddecl, newdecl);
2019 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2020 /* Don't clear out the arguments if we're just redeclaring a
2022 if (DECL_ARGUMENTS (olddecl))
2023 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2026 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2027 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2029 /* Now preserve various other info from the definition. */
2030 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2031 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2032 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2033 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2035 /* Warn about conflicting visibility specifications. */
2036 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2037 && DECL_VISIBILITY_SPECIFIED (newdecl)
2038 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2040 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2041 "because it", newdecl);
2042 warning (OPT_Wattributes, "%Jconflicts with previous "
2043 "declaration here", olddecl);
2045 /* Choose the declaration which specified visibility. */
2046 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2048 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2049 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2051 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2052 so keep this behavior. */
2053 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2055 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2056 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2059 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2060 with that from NEWDECL below. */
2061 if (DECL_LANG_SPECIFIC (olddecl))
2063 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2064 != DECL_LANG_SPECIFIC (newdecl));
2065 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2068 /* Merge the USED information. */
2069 if (TREE_USED (olddecl))
2070 TREE_USED (newdecl) = 1;
2071 else if (TREE_USED (newdecl))
2072 TREE_USED (olddecl) = 1;
2074 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2078 function_size = sizeof (struct tree_decl_common);
2080 memcpy ((char *) olddecl + sizeof (struct tree_common),
2081 (char *) newdecl + sizeof (struct tree_common),
2082 function_size - sizeof (struct tree_common));
2084 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2085 (char *) newdecl + sizeof (struct tree_decl_common),
2086 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2088 /* If newdecl is a template instantiation, it is possible that
2089 the following sequence of events has occurred:
2091 o A friend function was declared in a class template. The
2092 class template was instantiated.
2094 o The instantiation of the friend declaration was
2095 recorded on the instantiation list, and is newdecl.
2097 o Later, however, instantiate_class_template called pushdecl
2098 on the newdecl to perform name injection. But, pushdecl in
2099 turn called duplicate_decls when it discovered that another
2100 declaration of a global function with the same name already
2103 o Here, in duplicate_decls, we decided to clobber newdecl.
2105 If we're going to do that, we'd better make sure that
2106 olddecl, and not newdecl, is on the list of
2107 instantiations so that if we try to do the instantiation
2108 again we won't get the clobbered declaration. */
2109 reregister_specialization (newdecl,
2115 size_t size = tree_code_size (TREE_CODE (olddecl));
2116 memcpy ((char *) olddecl + sizeof (struct tree_common),
2117 (char *) newdecl + sizeof (struct tree_common),
2118 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2119 switch (TREE_CODE (olddecl))
2129 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2130 (char *) newdecl + sizeof (struct tree_decl_common),
2131 size - sizeof (struct tree_decl_common)
2132 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2136 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2137 (char *) newdecl + sizeof (struct tree_decl_common),
2138 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2139 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2143 DECL_UID (olddecl) = olddecl_uid;
2145 DECL_FRIEND_P (olddecl) = 1;
2148 DECL_ANTICIPATED (olddecl) = 1;
2149 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2152 /* NEWDECL contains the merged attribute lists.
2153 Update OLDDECL to be the same. */
2154 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2156 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2157 so that encode_section_info has a chance to look at the new decl
2158 flags and attributes. */
2159 if (DECL_RTL_SET_P (olddecl)
2160 && (TREE_CODE (olddecl) == FUNCTION_DECL
2161 || (TREE_CODE (olddecl) == VAR_DECL
2162 && TREE_STATIC (olddecl))))
2163 make_decl_rtl (olddecl);
2165 /* The NEWDECL will no longer be needed. Because every out-of-class
2166 declaration of a member results in a call to duplicate_decls,
2167 freeing these nodes represents in a significant savings. */
2173 /* Return zero if the declaration NEWDECL is valid
2174 when the declaration OLDDECL (assumed to be for the same name)
2175 has already been seen.
2176 Otherwise return an error message format string with a %s
2177 where the identifier should go. */
2180 redeclaration_error_message (tree newdecl, tree olddecl)
2182 if (TREE_CODE (newdecl) == TYPE_DECL)
2184 /* Because C++ can put things into name space for free,
2185 constructs like "typedef struct foo { ... } foo"
2186 would look like an erroneous redeclaration. */
2187 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2190 return "redefinition of %q#D";
2192 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2194 /* If this is a pure function, its olddecl will actually be
2195 the original initialization to `0' (which we force to call
2196 abort()). Don't complain about redefinition in this case. */
2197 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2198 && DECL_INITIAL (olddecl) == NULL_TREE)
2201 /* If both functions come from different namespaces, this is not
2202 a redeclaration - this is a conflict with a used function. */
2203 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2204 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2205 && ! decls_match (olddecl, newdecl))
2206 return "%qD conflicts with used function";
2208 /* We'll complain about linkage mismatches in
2209 warn_extern_redeclared_static. */
2211 /* Defining the same name twice is no good. */
2212 if (DECL_INITIAL (olddecl) != NULL_TREE
2213 && DECL_INITIAL (newdecl) != NULL_TREE)
2215 if (DECL_NAME (olddecl) == NULL_TREE)
2216 return "%q#D not declared in class";
2217 else if (!GNU_INLINE_P (olddecl)
2218 || GNU_INLINE_P (newdecl))
2219 return "redefinition of %q#D";
2222 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2224 bool olda = GNU_INLINE_P (olddecl);
2225 bool newa = GNU_INLINE_P (newdecl);
2230 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2232 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2238 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2242 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2244 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2245 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2246 return "redefinition of %q#D";
2250 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2251 || (DECL_TEMPLATE_RESULT (newdecl)
2252 == DECL_TEMPLATE_RESULT (olddecl)))
2255 nt = DECL_TEMPLATE_RESULT (newdecl);
2256 if (DECL_TEMPLATE_INFO (nt))
2257 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2258 ot = DECL_TEMPLATE_RESULT (olddecl);
2259 if (DECL_TEMPLATE_INFO (ot))
2260 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2261 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2262 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2263 return "redefinition of %q#D";
2265 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2267 bool olda = GNU_INLINE_P (ot);
2268 bool newa = GNU_INLINE_P (nt);
2273 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2275 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2279 /* Core issue #226 (C++0x):
2281 If a friend function template declaration specifies a
2282 default template-argument, that declaration shall be a
2283 definition and shall be the only declaration of the
2284 function template in the translation unit. */
2285 if ((cxx_dialect != cxx98)
2286 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2287 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2288 /*is_primary=*/1, /*is_partial=*/0,
2289 /*is_friend_decl=*/2))
2290 return "redeclaration of friend %q#D may not have default template arguments";
2294 else if (TREE_CODE (newdecl) == VAR_DECL
2295 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2296 && (! DECL_LANG_SPECIFIC (olddecl)
2297 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2298 || DECL_THREAD_LOCAL_P (newdecl)))
2300 /* Only variables can be thread-local, and all declarations must
2301 agree on this property. */
2302 if (DECL_THREAD_LOCAL_P (newdecl))
2303 return "thread-local declaration of %q#D follows "
2304 "non-thread-local declaration";
2306 return "non-thread-local declaration of %q#D follows "
2307 "thread-local declaration";
2309 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2311 /* The objects have been declared at namespace scope. If either
2312 is a member of an anonymous union, then this is an invalid
2313 redeclaration. For example:
2319 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2320 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2321 return "redeclaration of %q#D";
2322 /* If at least one declaration is a reference, there is no
2323 conflict. For example:
2329 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2331 /* Reject two definitions. */
2332 return "redefinition of %q#D";
2336 /* Objects declared with block scope: */
2337 /* Reject two definitions, and reject a definition
2338 together with an external reference. */
2339 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2340 return "redeclaration of %q#D";
2345 /* Hash and equality functions for the named_label table. */
2348 named_label_entry_hash (const void *data)
2350 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2351 return DECL_UID (ent->label_decl);
2355 named_label_entry_eq (const void *a, const void *b)
2357 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2358 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2359 return ent_a->label_decl == ent_b->label_decl;
2362 /* Create a new label, named ID. */
2365 make_label_decl (tree id, int local_p)
2367 struct named_label_entry *ent;
2371 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2373 DECL_CONTEXT (decl) = current_function_decl;
2374 DECL_MODE (decl) = VOIDmode;
2375 C_DECLARED_LABEL_FLAG (decl) = local_p;
2377 /* Say where one reference is to the label, for the sake of the
2378 error if it is not defined. */
2379 DECL_SOURCE_LOCATION (decl) = input_location;
2381 /* Record the fact that this identifier is bound to this label. */
2382 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2384 /* Create the label htab for the function on demand. */
2386 named_labels = htab_create_ggc (13, named_label_entry_hash,
2387 named_label_entry_eq, NULL);
2389 /* Record this label on the list of labels used in this function.
2390 We do this before calling make_label_decl so that we get the
2391 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2392 ent = GGC_CNEW (struct named_label_entry);
2393 ent->label_decl = decl;
2395 slot = htab_find_slot (named_labels, ent, INSERT);
2396 gcc_assert (*slot == NULL);
2402 /* Look for a label named ID in the current function. If one cannot
2403 be found, create one. (We keep track of used, but undefined,
2404 labels, and complain about them at the end of a function.) */
2407 lookup_label (tree id)
2411 timevar_push (TV_NAME_LOOKUP);
2412 /* You can't use labels at global scope. */
2413 if (current_function_decl == NULL_TREE)
2415 error ("label %qE referenced outside of any function", id);
2416 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2419 /* See if we've already got this label. */
2420 decl = IDENTIFIER_LABEL_VALUE (id);
2421 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2422 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2424 decl = make_label_decl (id, /*local_p=*/0);
2425 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2428 /* Declare a local label named ID. */
2431 declare_local_label (tree id)
2435 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2436 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2437 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2438 current_binding_level->shadowed_labels);
2439 current_binding_level->shadowed_labels = shadow;
2441 decl = make_label_decl (id, /*local_p=*/1);
2442 TREE_VALUE (shadow) = decl;
2447 /* Returns nonzero if it is ill-formed to jump past the declaration of
2448 DECL. Returns 2 if it's also a real problem. */
2451 decl_jump_unsafe (tree decl)
2453 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2454 || TREE_TYPE (decl) == error_mark_node)
2457 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2458 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2461 if (pod_type_p (TREE_TYPE (decl)))
2464 /* The POD stuff is just pedantry; why should it matter if the class
2465 contains a field of pointer to member type? */
2469 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2472 identify_goto (tree decl, const location_t *locus)
2475 permerror (input_location, "jump to label %qD", decl);
2477 permerror (input_location, "jump to case label");
2479 permerror (input_location, "%H from here", locus);
2482 /* Check that a single previously seen jump to a newly defined label
2483 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2484 the jump context; NAMES are the names in scope in LEVEL at the jump
2485 context; LOCUS is the source position of the jump or 0. Returns
2486 true if all is well. */
2489 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2490 bool exited_omp, const location_t *locus)
2492 struct cp_binding_level *b;
2493 bool identified = false, saw_eh = false, saw_omp = false;
2497 identify_goto (decl, locus);
2498 error (" exits OpenMP structured block");
2499 identified = saw_omp = true;
2502 for (b = current_binding_level; b ; b = b->level_chain)
2504 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2506 for (new_decls = b->names; new_decls != old_decls;
2507 new_decls = TREE_CHAIN (new_decls))
2509 int problem = decl_jump_unsafe (new_decls);
2515 identify_goto (decl, locus);
2519 error (" crosses initialization of %q+#D", new_decls);
2521 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2526 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2530 identify_goto (decl, locus);
2533 if (b->kind == sk_try)
2534 error (" enters try block");
2536 error (" enters catch block");
2539 if (b->kind == sk_omp && !saw_omp)
2543 identify_goto (decl, locus);
2546 error (" enters OpenMP structured block");
2555 check_previous_goto (tree decl, struct named_label_use_entry *use)
2557 check_previous_goto_1 (decl, use->binding_level,
2558 use->names_in_scope, use->in_omp_scope,
2559 &use->o_goto_locus);
2563 check_switch_goto (struct cp_binding_level* level)
2565 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2568 /* Check that a new jump to a label DECL is OK. Called by
2569 finish_goto_stmt. */
2572 check_goto (tree decl)
2574 struct named_label_entry *ent, dummy;
2575 bool saw_catch = false, identified = false;
2578 /* We can't know where a computed goto is jumping.
2579 So we assume that it's OK. */
2580 if (TREE_CODE (decl) != LABEL_DECL)
2583 /* We didn't record any information about this label when we created it,
2584 and there's not much point since it's trivial to analyze as a return. */
2585 if (decl == cdtor_label)
2588 dummy.label_decl = decl;
2589 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2590 gcc_assert (ent != NULL);
2592 /* If the label hasn't been defined yet, defer checking. */
2593 if (! DECL_INITIAL (decl))
2595 struct named_label_use_entry *new_use;
2597 /* Don't bother creating another use if the last goto had the
2598 same data, and will therefore create the same set of errors. */
2600 && ent->uses->names_in_scope == current_binding_level->names)
2603 new_use = GGC_NEW (struct named_label_use_entry);
2604 new_use->binding_level = current_binding_level;
2605 new_use->names_in_scope = current_binding_level->names;
2606 new_use->o_goto_locus = input_location;
2607 new_use->in_omp_scope = false;
2609 new_use->next = ent->uses;
2610 ent->uses = new_use;
2614 if (ent->in_try_scope || ent->in_catch_scope
2615 || ent->in_omp_scope || ent->bad_decls)
2617 permerror (input_location, "jump to label %q+D", decl);
2618 permerror (input_location, " from here");
2622 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2624 tree b = TREE_VALUE (bad);
2625 int u = decl_jump_unsafe (b);
2627 if (u > 1 && DECL_ARTIFICIAL (b))
2629 /* Can't skip init of __exception_info. */
2630 error ("%J enters catch block", b);
2634 error (" skips initialization of %q+#D", b);
2636 permerror (input_location, " enters scope of non-POD %q+#D", b);
2639 if (ent->in_try_scope)
2640 error (" enters try block");
2641 else if (ent->in_catch_scope && !saw_catch)
2642 error (" enters catch block");
2644 if (ent->in_omp_scope)
2645 error (" enters OpenMP structured block");
2646 else if (flag_openmp)
2648 struct cp_binding_level *b;
2649 for (b = current_binding_level; b ; b = b->level_chain)
2651 if (b == ent->binding_level)
2653 if (b->kind == sk_omp)
2657 permerror (input_location, "jump to label %q+D", decl);
2658 permerror (input_location, " from here");
2661 error (" exits OpenMP structured block");
2668 /* Check that a return is ok wrt OpenMP structured blocks.
2669 Called by finish_return_stmt. Returns true if all is well. */
2672 check_omp_return (void)
2674 struct cp_binding_level *b;
2675 for (b = current_binding_level; b ; b = b->level_chain)
2676 if (b->kind == sk_omp)
2678 error ("invalid exit from OpenMP structured block");
2684 /* Define a label, specifying the location in the source file.
2685 Return the LABEL_DECL node for the label. */
2688 define_label (location_t location, tree name)
2690 struct named_label_entry *ent, dummy;
2691 struct cp_binding_level *p;
2694 timevar_push (TV_NAME_LOOKUP);
2696 decl = lookup_label (name);
2698 dummy.label_decl = decl;
2699 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2700 gcc_assert (ent != NULL);
2702 /* After labels, make any new cleanups in the function go into their
2703 own new (temporary) binding contour. */
2704 for (p = current_binding_level;
2705 p->kind != sk_function_parms;
2707 p->more_cleanups_ok = 0;
2709 if (name == get_identifier ("wchar_t"))
2710 permerror (input_location, "label named wchar_t");
2712 if (DECL_INITIAL (decl) != NULL_TREE)
2714 error ("duplicate label %qD", decl);
2715 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2719 struct named_label_use_entry *use;
2721 /* Mark label as having been defined. */
2722 DECL_INITIAL (decl) = error_mark_node;
2723 /* Say where in the source. */
2724 DECL_SOURCE_LOCATION (decl) = location;
2726 ent->binding_level = current_binding_level;
2727 ent->names_in_scope = current_binding_level->names;
2729 for (use = ent->uses; use ; use = use->next)
2730 check_previous_goto (decl, use);
2734 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2739 struct cp_binding_level *level;
2740 struct cp_switch *next;
2741 /* The SWITCH_STMT being built. */
2743 /* A splay-tree mapping the low element of a case range to the high
2744 element, or NULL_TREE if there is no high element. Used to
2745 determine whether or not a new case label duplicates an old case
2746 label. We need a tree, rather than simply a hash table, because
2747 of the GNU case range extension. */
2751 /* A stack of the currently active switch statements. The innermost
2752 switch statement is on the top of the stack. There is no need to
2753 mark the stack for garbage collection because it is only active
2754 during the processing of the body of a function, and we never
2755 collect at that point. */
2757 static struct cp_switch *switch_stack;
2759 /* Called right after a switch-statement condition is parsed.
2760 SWITCH_STMT is the switch statement being parsed. */
2763 push_switch (tree switch_stmt)
2765 struct cp_switch *p = XNEW (struct cp_switch);
2766 p->level = current_binding_level;
2767 p->next = switch_stack;
2768 p->switch_stmt = switch_stmt;
2769 p->cases = splay_tree_new (case_compare, NULL, NULL);
2776 struct cp_switch *cs = switch_stack;
2777 location_t switch_location;
2779 /* Emit warnings as needed. */
2780 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2781 switch_location = EXPR_LOCATION (cs->switch_stmt);
2783 switch_location = input_location;
2784 if (!processing_template_decl)
2785 c_do_switch_warnings (cs->cases, switch_location,
2786 SWITCH_STMT_TYPE (cs->switch_stmt),
2787 SWITCH_STMT_COND (cs->switch_stmt));
2789 splay_tree_delete (cs->cases);
2790 switch_stack = switch_stack->next;
2794 /* Note that we've seen a definition of a case label, and complain if this
2795 is a bad place for one. */
2798 finish_case_label (location_t loc, tree low_value, tree high_value)
2801 struct cp_binding_level *p;
2803 if (processing_template_decl)
2807 /* For templates, just add the case label; we'll do semantic
2808 analysis at instantiation-time. */
2809 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2810 return add_stmt (build_case_label (loc, low_value, high_value, label));
2813 /* Find the condition on which this switch statement depends. */
2814 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2815 if (cond && TREE_CODE (cond) == TREE_LIST)
2816 cond = TREE_VALUE (cond);
2818 if (!check_switch_goto (switch_stack->level))
2819 return error_mark_node;
2821 r = c_add_case_label (loc, switch_stack->cases, cond,
2822 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2823 low_value, high_value);
2825 /* After labels, make any new cleanups in the function go into their
2826 own new (temporary) binding contour. */
2827 for (p = current_binding_level;
2828 p->kind != sk_function_parms;
2830 p->more_cleanups_ok = 0;
2835 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2838 typename_hash (const void* k)
2841 const_tree const t = (const_tree) k;
2843 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2844 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2849 typedef struct typename_info {
2857 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2858 really of type `typename_info*' */
2861 typename_compare (const void * k1, const void * k2)
2863 const_tree const t1 = (const_tree) k1;
2864 const typename_info *const t2 = (const typename_info *) k2;
2866 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2867 && TYPE_CONTEXT (t1) == t2->scope
2868 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2869 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2870 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2873 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2874 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2876 Returns the new TYPENAME_TYPE. */
2878 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2881 build_typename_type (tree context, tree name, tree fullname,
2882 enum tag_types tag_type)
2890 if (typename_htab == NULL)
2891 typename_htab = htab_create_ggc (61, &typename_hash,
2892 &typename_compare, NULL);
2894 ti.scope = FROB_CONTEXT (context);
2896 ti.template_id = fullname;
2897 ti.enum_p = tag_type == enum_type;
2898 ti.class_p = (tag_type == class_type
2899 || tag_type == record_type
2900 || tag_type == union_type);
2901 hash = (htab_hash_pointer (ti.scope)
2902 ^ htab_hash_pointer (ti.name));
2904 /* See if we already have this type. */
2905 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2910 /* Build the TYPENAME_TYPE. */
2911 t = cxx_make_type (TYPENAME_TYPE);
2912 TYPE_CONTEXT (t) = ti.scope;
2913 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2914 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2915 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2917 /* Build the corresponding TYPE_DECL. */
2918 d = build_decl (input_location, TYPE_DECL, name, t);
2919 TYPE_NAME (TREE_TYPE (d)) = d;
2920 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2921 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2922 DECL_ARTIFICIAL (d) = 1;
2924 /* Store it in the hash table. */
2927 /* TYPENAME_TYPEs must always be compared structurally, because
2928 they may or may not resolve down to another type depending on
2929 the currently open classes. */
2930 SET_TYPE_STRUCTURAL_EQUALITY (t);
2936 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2937 provided to name the type. Returns an appropriate type, unless an
2938 error occurs, in which case error_mark_node is returned. If we
2939 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2940 return that, rather than the _TYPE it corresponds to, in other
2941 cases we look through the type decl. If TF_ERROR is set, complain
2942 about errors, otherwise be quiet. */
2945 make_typename_type (tree context, tree name, enum tag_types tag_type,
2946 tsubst_flags_t complain)
2952 if (name == error_mark_node
2953 || context == NULL_TREE
2954 || context == error_mark_node)
2955 return error_mark_node;
2959 if (!(TYPE_LANG_SPECIFIC (name)
2960 && (CLASSTYPE_IS_TEMPLATE (name)
2961 || CLASSTYPE_USE_TEMPLATE (name))))
2962 name = TYPE_IDENTIFIER (name);
2964 /* Create a TEMPLATE_ID_EXPR for the type. */
2965 name = build_nt (TEMPLATE_ID_EXPR,
2966 CLASSTYPE_TI_TEMPLATE (name),
2967 CLASSTYPE_TI_ARGS (name));
2969 else if (TREE_CODE (name) == TYPE_DECL)
2970 name = DECL_NAME (name);
2974 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2976 name = TREE_OPERAND (name, 0);
2977 if (TREE_CODE (name) == TEMPLATE_DECL)
2978 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2979 else if (TREE_CODE (name) == OVERLOAD)
2981 error ("%qD is not a type", name);
2982 return error_mark_node;
2985 if (TREE_CODE (name) == TEMPLATE_DECL)
2987 error ("%qD used without template parameters", name);
2988 return error_mark_node;
2990 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2991 gcc_assert (TYPE_P (context));
2993 if (!MAYBE_CLASS_TYPE_P (context))
2995 if (complain & tf_error)
2996 error ("%q#T is not a class", context);
2997 return error_mark_node;
3000 /* When the CONTEXT is a dependent type, NAME could refer to a
3001 dependent base class of CONTEXT. But look inside it anyway
3002 if CONTEXT is a currently open scope, in case it refers to a
3003 member of the current instantiation or a non-dependent base;
3004 lookup will stop when we hit a dependent base. */
3005 if (!dependent_scope_p (context))
3006 /* We should only set WANT_TYPE when we're a nested typename type.
3007 Then we can give better diagnostics if we find a non-type. */
3008 t = lookup_field (context, name, 0, /*want_type=*/true);
3012 if (!t && dependent_type_p (context))
3013 return build_typename_type (context, name, fullname, tag_type);
3015 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3019 if (complain & tf_error)
3020 error (want_template ? "no class template named %q#T in %q#T"
3021 : "no type named %q#T in %q#T", name, context);
3022 return error_mark_node;
3025 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3027 if (complain & tf_error)
3028 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3030 return error_mark_node;
3032 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3034 if (complain & tf_error)
3035 error ("%<typename %T::%D%> names %q#T, which is not a type",
3037 return error_mark_node;
3040 if (complain & tf_error)
3041 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3044 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3046 /*entering_scope=*/0,
3047 tf_warning_or_error | tf_user);
3049 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3055 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3056 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3057 in which case error_mark_node is returned.
3059 If PARM_LIST is non-NULL, also make sure that the template parameter
3060 list of TEMPLATE_DECL matches.
3062 If COMPLAIN zero, don't complain about any errors that occur. */
3065 make_unbound_class_template (tree context, tree name, tree parm_list,
3066 tsubst_flags_t complain)
3072 name = TYPE_IDENTIFIER (name);
3073 else if (DECL_P (name))
3074 name = DECL_NAME (name);
3075 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3077 if (!dependent_type_p (context)
3078 || currently_open_class (context))
3080 tree tmpl = NULL_TREE;
3082 if (MAYBE_CLASS_TYPE_P (context))
3083 tmpl = lookup_field (context, name, 0, false);
3085 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3087 if (complain & tf_error)
3088 error ("no class template named %q#T in %q#T", name, context);
3089 return error_mark_node;
3093 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3095 if (complain & tf_error)
3097 error ("template parameters do not match template");
3098 error ("%q+D declared here", tmpl);
3100 return error_mark_node;
3103 if (complain & tf_error)
3104 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3109 /* Build the UNBOUND_CLASS_TEMPLATE. */
3110 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3111 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3112 TREE_TYPE (t) = NULL_TREE;
3113 SET_TYPE_STRUCTURAL_EQUALITY (t);
3115 /* Build the corresponding TEMPLATE_DECL. */
3116 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3117 TYPE_NAME (TREE_TYPE (d)) = d;
3118 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3119 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3120 DECL_ARTIFICIAL (d) = 1;
3121 DECL_TEMPLATE_PARMS (d) = parm_list;
3128 /* Push the declarations of builtin types into the namespace.
3129 RID_INDEX is the index of the builtin type in the array
3130 RID_POINTERS. NAME is the name used when looking up the builtin
3131 type. TYPE is the _TYPE node for the builtin type. */
3134 record_builtin_type (enum rid rid_index,
3138 tree rname = NULL_TREE, tname = NULL_TREE;
3139 tree tdecl = NULL_TREE;
3141 if ((int) rid_index < (int) RID_MAX)
3142 rname = ridpointers[(int) rid_index];
3144 tname = get_identifier (name);
3146 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3147 eliminated. Built-in types should not be looked up name; their
3148 names are keywords that the parser can recognize. However, there
3149 is code in c-common.c that uses identifier_global_value to look
3150 up built-in types by name. */
3153 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3154 DECL_ARTIFICIAL (tdecl) = 1;
3155 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3161 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3162 DECL_ARTIFICIAL (tdecl) = 1;
3164 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3167 if (!TYPE_NAME (type))
3168 TYPE_NAME (type) = tdecl;
3171 debug_hooks->type_decl (tdecl, 0);
3174 /* Record one of the standard Java types.
3175 * Declare it as having the given NAME.
3176 * If SIZE > 0, it is the size of one of the integral types;
3177 * otherwise it is the negative of the size of one of the other types. */
3180 record_builtin_java_type (const char* name, int size)
3184 type = build_nonstandard_integer_type (size, 0);
3185 else if (size > -32)
3188 /* "__java_char" or ""__java_boolean". */
3189 type = build_nonstandard_integer_type (-size, 1);
3190 /* Get the signed type cached and attached to the unsigned type,
3191 so it doesn't get garbage-collected at "random" times,
3192 causing potential codegen differences out of different UIDs
3193 and different alias set numbers. */
3194 stype = build_nonstandard_integer_type (-size, 0);
3195 TREE_CHAIN (type) = stype;
3196 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3199 { /* "__java_float" or ""__java_double". */
3200 type = make_node (REAL_TYPE);
3201 TYPE_PRECISION (type) = - size;
3204 record_builtin_type (RID_MAX, name, type);
3205 decl = TYPE_NAME (type);
3207 /* Suppress generate debug symbol entries for these types,
3208 since for normal C++ they are just clutter.
3209 However, push_lang_context undoes this if extern "Java" is seen. */
3210 DECL_IGNORED_P (decl) = 1;
3212 TYPE_FOR_JAVA (type) = 1;
3216 /* Push a type into the namespace so that the back ends ignore it. */
3219 record_unknown_type (tree type, const char* name)
3221 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3222 TYPE_DECL, get_identifier (name), type));
3223 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3224 DECL_IGNORED_P (decl) = 1;
3225 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3226 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3227 TYPE_ALIGN (type) = 1;
3228 TYPE_USER_ALIGN (type) = 0;
3229 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3232 /* A string for which we should create an IDENTIFIER_NODE at
3235 typedef struct predefined_identifier
3237 /* The name of the identifier. */
3238 const char *const name;
3239 /* The place where the IDENTIFIER_NODE should be stored. */
3241 /* Nonzero if this is the name of a constructor or destructor. */
3242 const int ctor_or_dtor_p;
3243 } predefined_identifier;
3245 /* Create all the predefined identifiers. */
3248 initialize_predefined_identifiers (void)
3250 const predefined_identifier *pid;
3252 /* A table of identifiers to create at startup. */
3253 static const predefined_identifier predefined_identifiers[] = {
3254 { "C++", &lang_name_cplusplus, 0 },
3255 { "C", &lang_name_c, 0 },
3256 { "Java", &lang_name_java, 0 },
3257 /* Some of these names have a trailing space so that it is
3258 impossible for them to conflict with names written by users. */
3259 { "__ct ", &ctor_identifier, 1 },
3260 { "__base_ctor ", &base_ctor_identifier, 1 },
3261 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3262 { "__dt ", &dtor_identifier, 1 },
3263 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3264 { "__base_dtor ", &base_dtor_identifier, 1 },
3265 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3266 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3267 { "nelts", &nelts_identifier, 0 },
3268 { THIS_NAME, &this_identifier, 0 },
3269 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3270 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3271 { "_vptr", &vptr_identifier, 0 },
3272 { "__vtt_parm", &vtt_parm_identifier, 0 },
3273 { "::", &global_scope_name, 0 },
3274 { "std", &std_identifier, 0 },
3278 for (pid = predefined_identifiers; pid->name; ++pid)
3280 *pid->node = get_identifier (pid->name);
3281 if (pid->ctor_or_dtor_p)
3282 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3286 /* Create the predefined scalar types of C,
3287 and some nodes representing standard constants (0, 1, (void *)0).
3288 Initialize the global binding level.
3289 Make definitions for built-in primitive functions. */
3292 cxx_init_decl_processing (void)
3295 tree void_ftype_ptr;
3297 build_common_tree_nodes (flag_signed_char, false);
3299 /* Create all the identifiers we need. */
3300 initialize_predefined_identifiers ();
3302 /* Create the global variables. */
3303 push_to_top_level ();
3305 current_function_decl = NULL_TREE;
3306 current_binding_level = NULL;
3307 /* Enter the global namespace. */
3308 gcc_assert (global_namespace == NULL_TREE);
3309 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3311 TREE_PUBLIC (global_namespace) = 1;
3312 begin_scope (sk_namespace, global_namespace);
3314 current_lang_name = NULL_TREE;
3316 if (flag_visibility_ms_compat)
3317 default_visibility = VISIBILITY_HIDDEN;
3320 current_lang_name = lang_name_c;
3322 /* Create the `std' namespace. */
3323 push_namespace (std_identifier);
3324 std_node = current_namespace;
3327 c_common_nodes_and_builtins ();
3329 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3330 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3331 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3332 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3333 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3334 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3335 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3336 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3338 integer_two_node = build_int_cst (NULL_TREE, 2);
3339 integer_three_node = build_int_cst (NULL_TREE, 3);
3341 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3342 truthvalue_type_node = boolean_type_node;
3343 truthvalue_false_node = boolean_false_node;
3344 truthvalue_true_node = boolean_true_node;
3346 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3349 record_builtin_type (RID_MAX, NULL, string_type_node);
3352 delta_type_node = ptrdiff_type_node;
3353 vtable_index_type = ptrdiff_type_node;
3355 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3356 void_ftype = build_function_type (void_type_node, void_list_node);
3357 void_ftype_ptr = build_function_type (void_type_node,
3358 tree_cons (NULL_TREE,
3362 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3364 /* C++ extensions */
3366 unknown_type_node = make_node (UNKNOWN_TYPE);
3367 record_unknown_type (unknown_type_node, "unknown type");
3369 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3370 TREE_TYPE (unknown_type_node) = unknown_type_node;
3372 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3374 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3375 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3377 init_list_type_node = make_node (UNKNOWN_TYPE);
3378 record_unknown_type (init_list_type_node, "init list");
3381 /* Make sure we get a unique function type, so we can give
3382 its pointer type a name. (This wins for gdb.) */
3383 tree vfunc_type = make_node (FUNCTION_TYPE);
3384 TREE_TYPE (vfunc_type) = integer_type_node;
3385 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3386 layout_type (vfunc_type);
3388 vtable_entry_type = build_pointer_type (vfunc_type);
3390 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3393 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3394 layout_type (vtbl_type_node);
3395 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3396 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3397 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3398 layout_type (vtbl_ptr_type_node);
3399 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3401 push_namespace (get_identifier ("__cxxabiv1"));
3402 abi_node = current_namespace;
3405 global_type_node = make_node (LANG_TYPE);
3406 record_unknown_type (global_type_node, "global type");
3409 current_lang_name = lang_name_cplusplus;
3413 tree bad_alloc_type_node;
3414 tree bad_alloc_decl;
3415 tree newtype, deltype;
3416 tree ptr_ftype_sizetype;
3418 push_namespace (std_identifier);
3419 bad_alloc_id = get_identifier ("bad_alloc");
3420 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3421 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3423 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3424 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3425 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3429 = build_function_type (ptr_type_node,
3430 tree_cons (NULL_TREE,
3433 newtype = build_exception_variant
3434 (ptr_ftype_sizetype, add_exception_specifier
3435 (NULL_TREE, bad_alloc_type_node, -1));
3436 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3437 push_cp_library_fn (NEW_EXPR, newtype);
3438 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3439 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3440 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3444 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3446 /* Perform other language dependent initializations. */
3447 init_class_processing ();
3448 init_rtti_processing ();
3450 if (flag_exceptions)
3451 init_exception_processing ();
3453 if (! supports_one_only ())
3456 make_fname_decl = cp_make_fname_decl;
3457 start_fname_decls ();
3459 /* Show we use EH for cleanups. */
3460 if (flag_exceptions)
3461 using_eh_for_cleanups ();
3464 /* Generate an initializer for a function naming variable from
3465 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3466 filled in with the type of the init. */
3469 cp_fname_init (const char* name, tree *type_p)
3471 tree domain = NULL_TREE;
3473 tree init = NULL_TREE;
3478 length = strlen (name);
3479 domain = build_index_type (size_int (length));
3480 init = build_string (length + 1, name);
3483 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3484 type = build_cplus_array_type (type, domain);
3489 TREE_TYPE (init) = type;
3491 init = error_mark_node;
3496 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3497 the decl, LOC is the location to give the decl, NAME is the
3498 initialization string and TYPE_DEP indicates whether NAME depended
3499 on the type of the function. We make use of that to detect
3500 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3501 at the point of first use, so we mustn't push the decl now. */
3504 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3506 const char *const name = (type_dep && processing_template_decl
3507 ? NULL : fname_as_string (type_dep));
3509 tree init = cp_fname_init (name, &type);
3510 tree decl = build_decl (loc, VAR_DECL, id, type);
3513 free (CONST_CAST (char *, name));
3515 /* As we're using pushdecl_with_scope, we must set the context. */
3516 DECL_CONTEXT (decl) = current_function_decl;
3517 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3519 TREE_STATIC (decl) = 1;
3520 TREE_READONLY (decl) = 1;
3521 DECL_ARTIFICIAL (decl) = 1;
3523 TREE_USED (decl) = 1;
3525 if (current_function_decl)
3527 struct cp_binding_level *b = current_binding_level;
3528 while (b->level_chain->kind != sk_function_parms)
3530 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3531 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3532 LOOKUP_ONLYCONVERTING);
3535 pushdecl_top_level_and_finish (decl, init);
3541 builtin_function_1 (tree decl, tree context, bool is_global)
3543 tree id = DECL_NAME (decl);
3544 const char *name = IDENTIFIER_POINTER (id);
3546 retrofit_lang_decl (decl);
3548 /* All nesting of C++ functions is lexical; there is never a "static
3549 chain" in the sense of GNU C nested functions. */
3550 DECL_NO_STATIC_CHAIN (decl) = 1;
3552 DECL_ARTIFICIAL (decl) = 1;
3553 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3554 SET_DECL_LANGUAGE (decl, lang_c);
3555 /* Runtime library routines are, by definition, available in an
3556 external shared object. */
3557 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3558 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3560 DECL_CONTEXT (decl) = context;
3563 pushdecl_top_level (decl);
3567 /* A function in the user's namespace should have an explicit
3568 declaration before it is used. Mark the built-in function as
3569 anticipated but not actually declared. */
3570 if (name[0] != '_' || name[1] != '_')
3571 DECL_ANTICIPATED (decl) = 1;
3572 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3574 size_t len = strlen (name);
3576 /* Treat __*_chk fortification functions as anticipated as well,
3577 unless they are __builtin_*. */
3578 if (len > strlen ("___chk")
3579 && memcmp (name + len - strlen ("_chk"),
3580 "_chk", strlen ("_chk") + 1) == 0)
3581 DECL_ANTICIPATED (decl) = 1;
3588 cxx_builtin_function (tree decl)
3590 tree id = DECL_NAME (decl);
3591 const char *name = IDENTIFIER_POINTER (id);
3592 /* All builtins that don't begin with an '_' should additionally
3593 go in the 'std' namespace. */
3596 tree decl2 = copy_node(decl);
3597 push_namespace (std_identifier);
3598 builtin_function_1 (decl2, std_node, false);
3602 return builtin_function_1 (decl, NULL_TREE, false);
3605 /* Like cxx_builtin_function, but guarantee the function is added to the global
3606 scope. This is to allow function specific options to add new machine
3607 dependent builtins when the target ISA changes via attribute((target(...)))
3608 which saves space on program startup if the program does not use non-generic
3612 cxx_builtin_function_ext_scope (tree decl)
3615 tree id = DECL_NAME (decl);
3616 const char *name = IDENTIFIER_POINTER (id);
3617 /* All builtins that don't begin with an '_' should additionally
3618 go in the 'std' namespace. */
3621 tree decl2 = copy_node(decl);
3622 push_namespace (std_identifier);
3623 builtin_function_1 (decl2, std_node, true);
3627 return builtin_function_1 (decl, NULL_TREE, true);
3630 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3631 function. Not called directly. */
3634 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3636 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3637 DECL_EXTERNAL (fn) = 1;
3638 TREE_PUBLIC (fn) = 1;
3639 DECL_ARTIFICIAL (fn) = 1;
3640 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3641 SET_DECL_LANGUAGE (fn, lang_c);
3642 /* Runtime library routines are, by definition, available in an
3643 external shared object. */
3644 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3645 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3649 /* Returns the _DECL for a library function with C linkage.
3650 We assume that such functions never throw; if this is incorrect,
3651 callers should unset TREE_NOTHROW. */
3654 build_library_fn (tree name, tree type)
3656 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3657 TREE_NOTHROW (fn) = 1;
3661 /* Returns the _DECL for a library function with C++ linkage. */
3664 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3666 tree fn = build_library_fn_1 (name, operator_code, type);
3667 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3668 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3669 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3673 /* Like build_library_fn, but takes a C string instead of an
3677 build_library_fn_ptr (const char* name, tree type)
3679 return build_library_fn (get_identifier (name), type);
3682 /* Like build_cp_library_fn, but takes a C string instead of an
3686 build_cp_library_fn_ptr (const char* name, tree type)
3688 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3691 /* Like build_library_fn, but also pushes the function so that we will
3692 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3693 may throw exceptions listed in RAISES. */
3696 push_library_fn (tree name, tree type, tree raises)
3701 type = build_exception_variant (type, raises);
3703 fn = build_library_fn (name, type);
3704 pushdecl_top_level (fn);
3708 /* Like build_cp_library_fn, but also pushes the function so that it
3709 will be found by normal lookup. */
3712 push_cp_library_fn (enum tree_code operator_code, tree type)
3714 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3721 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3725 push_void_library_fn (tree name, tree parmtypes)
3727 tree type = build_function_type (void_type_node, parmtypes);
3728 return push_library_fn (name, type, NULL_TREE);
3731 /* Like push_library_fn, but also note that this function throws
3732 and does not return. Used for __throw_foo and the like. */
3735 push_throw_library_fn (tree name, tree type)
3737 tree fn = push_library_fn (name, type, NULL_TREE);
3738 TREE_THIS_VOLATILE (fn) = 1;
3739 TREE_NOTHROW (fn) = 0;
3743 /* When we call finish_struct for an anonymous union, we create
3744 default copy constructors and such. But, an anonymous union
3745 shouldn't have such things; this function undoes the damage to the
3746 anonymous union type T.
3748 (The reason that we create the synthesized methods is that we don't
3749 distinguish `union { int i; }' from `typedef union { int i; } U'.
3750 The first is an anonymous union; the second is just an ordinary
3754 fixup_anonymous_aggr (tree t)
3758 /* Wipe out memory of synthesized methods. */
3759 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3760 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3761 TYPE_HAS_INIT_REF (t) = 0;
3762 TYPE_HAS_CONST_INIT_REF (t) = 0;
3763 TYPE_HAS_ASSIGN_REF (t) = 0;
3764 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3766 /* Splice the implicitly generated functions out of the TYPE_METHODS
3768 q = &TYPE_METHODS (t);
3771 if (DECL_ARTIFICIAL (*q))
3772 *q = TREE_CHAIN (*q);
3774 q = &TREE_CHAIN (*q);
3777 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3778 if (TYPE_METHODS (t))
3780 tree decl = TYPE_MAIN_DECL (t);
3782 if (TREE_CODE (t) != UNION_TYPE)
3783 error ("%Jan anonymous struct cannot have function members", decl);
3785 error ("%Jan anonymous union cannot have function members", decl);
3788 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3789 assignment operators (because they cannot have these methods themselves).
3790 For anonymous unions this is already checked because they are not allowed
3791 in any union, otherwise we have to check it. */
3792 if (TREE_CODE (t) != UNION_TYPE)
3796 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3797 if (TREE_CODE (field) == FIELD_DECL)
3799 type = TREE_TYPE (field);
3800 if (CLASS_TYPE_P (type))
3802 if (TYPE_NEEDS_CONSTRUCTING (type))
3803 error ("member %q+#D with constructor not allowed "
3804 "in anonymous aggregate", field);
3805 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3806 error ("member %q+#D with destructor not allowed "
3807 "in anonymous aggregate", field);
3808 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3809 error ("member %q+#D with copy assignment operator "
3810 "not allowed in anonymous aggregate", field);
3816 /* Make sure that a declaration with no declarator is well-formed, i.e.
3817 just declares a tagged type or anonymous union.
3819 Returns the type declared; or NULL_TREE if none. */
3822 check_tag_decl (cp_decl_specifier_seq *declspecs)
3824 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3825 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3826 /* If a class, struct, or enum type is declared by the DECLSPECS
3827 (i.e, if a class-specifier, enum-specifier, or non-typename
3828 elaborated-type-specifier appears in the DECLSPECS),
3829 DECLARED_TYPE is set to the corresponding type. */
3830 tree declared_type = NULL_TREE;
3831 bool error_p = false;
3833 if (declspecs->multiple_types_p)
3834 error ("multiple types in one declaration");
3835 else if (declspecs->redefined_builtin_type)
3837 if (!in_system_header)
3838 permerror (input_location, "redeclaration of C++ built-in type %qT",
3839 declspecs->redefined_builtin_type);
3844 && TYPE_P (declspecs->type)
3845 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3846 && MAYBE_CLASS_TYPE_P (declspecs->type))
3847 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3848 declared_type = declspecs->type;
3849 else if (declspecs->type == error_mark_node)
3851 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3852 permerror (input_location, "declaration does not declare anything");
3853 /* Check for an anonymous union. */
3854 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3855 && TYPE_ANONYMOUS_P (declared_type))
3857 /* 7/3 In a simple-declaration, the optional init-declarator-list
3858 can be omitted only when declaring a class (clause 9) or
3859 enumeration (7.2), that is, when the decl-specifier-seq contains
3860 either a class-specifier, an elaborated-type-specifier with
3861 a class-key (9.1), or an enum-specifier. In these cases and
3862 whenever a class-specifier or enum-specifier is present in the
3863 decl-specifier-seq, the identifiers in these specifiers are among
3864 the names being declared by the declaration (as class-name,
3865 enum-names, or enumerators, depending on the syntax). In such
3866 cases, and except for the declaration of an unnamed bit-field (9.6),
3867 the decl-specifier-seq shall introduce one or more names into the
3868 program, or shall redeclare a name introduced by a previous
3869 declaration. [Example:
3870 enum { }; // ill-formed
3871 typedef class { }; // ill-formed
3875 error ("missing type-name in typedef-declaration");
3878 /* Anonymous unions are objects, so they can have specifiers. */;
3879 SET_ANON_AGGR_TYPE_P (declared_type);
3881 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3882 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3887 if (declspecs->specs[(int)ds_inline]
3888 || declspecs->specs[(int)ds_virtual])
3889 error ("%qs can only be specified for functions",
3890 declspecs->specs[(int)ds_inline]
3891 ? "inline" : "virtual");
3893 && (!current_class_type
3894 || current_scope () != current_class_type))
3895 error ("%<friend%> can only be specified inside a class");
3896 else if (declspecs->specs[(int)ds_explicit])
3897 error ("%<explicit%> can only be specified for constructors");
3898 else if (declspecs->storage_class)
3899 error ("a storage class can only be specified for objects "
3901 else if (declspecs->specs[(int)ds_const]
3902 || declspecs->specs[(int)ds_volatile]
3903 || declspecs->specs[(int)ds_restrict]
3904 || declspecs->specs[(int)ds_thread])
3905 error ("qualifiers can only be specified for objects "
3907 else if (saw_typedef)
3908 warning (0, "%<typedef%> was ignored in this declaration");
3911 return declared_type;
3914 /* Called when a declaration is seen that contains no names to declare.
3915 If its type is a reference to a structure, union or enum inherited
3916 from a containing scope, shadow that tag name for the current scope
3917 with a forward reference.
3918 If its type defines a new named structure or union
3919 or defines an enum, it is valid but we need not do anything here.
3920 Otherwise, it is an error.
3922 C++: may have to grok the declspecs to learn about static,
3923 complain for anonymous unions.
3925 Returns the TYPE declared -- or NULL_TREE if none. */
3928 shadow_tag (cp_decl_specifier_seq *declspecs)
3930 tree t = check_tag_decl (declspecs);
3935 if (declspecs->attributes)
3937 warning (0, "attribute ignored in declaration of %q+#T", t);
3938 warning (0, "attribute for %q+#T must follow the %qs keyword",
3939 t, class_key_or_enum_as_string (t));
3943 if (maybe_process_partial_specialization (t) == error_mark_node)
3946 /* This is where the variables in an anonymous union are
3947 declared. An anonymous union declaration looks like:
3949 because there is no declarator after the union, the parser
3950 sends that declaration here. */
3951 if (ANON_AGGR_TYPE_P (t))
3953 fixup_anonymous_aggr (t);
3955 if (TYPE_FIELDS (t))
3957 tree decl = grokdeclarator (/*declarator=*/NULL,
3958 declspecs, NORMAL, 0, NULL);
3959 finish_anon_union (decl);
3966 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3969 groktypename (cp_decl_specifier_seq *type_specifiers,
3970 const cp_declarator *declarator,
3971 bool is_template_arg)
3975 enum decl_context context
3976 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3977 attrs = type_specifiers->attributes;
3978 type_specifiers->attributes = NULL_TREE;
3979 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3980 if (attrs && type != error_mark_node)
3982 if (CLASS_TYPE_P (type))
3983 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3984 "outside of definition", type);
3985 else if (MAYBE_CLASS_TYPE_P (type))
3986 /* A template type parameter or other dependent type. */
3987 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
3988 "type %qT without an associated declaration", type);
3990 cplus_decl_attributes (&type, attrs, 0);
3995 /* Process a DECLARATOR for a function-scope variable declaration,
3996 namespace-scope variable declaration, or function declaration.
3997 (Function definitions go through start_function; class member
3998 declarations appearing in the body of the class go through
3999 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4000 If an error occurs, the error_mark_node is returned instead.
4002 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4003 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4004 for an explicitly defaulted function, or SD_DELETED for an explicitly
4005 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4006 implicitly initialized via a default constructor. ATTRIBUTES and
4007 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4008 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4009 set, the caller is responsible for calling pop_scope. */
4012 start_decl (const cp_declarator *declarator,
4013 cp_decl_specifier_seq *declspecs,
4016 tree prefix_attributes,
4017 tree *pushed_scope_p)
4025 *pushed_scope_p = NULL_TREE;
4027 /* An object declared as __attribute__((deprecated)) suppresses
4028 warnings of uses of other deprecated items. */
4029 if (lookup_attribute ("deprecated", attributes))
4030 deprecated_state = DEPRECATED_SUPPRESS;
4032 attributes = chainon (attributes, prefix_attributes);
4034 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4037 deprecated_state = DEPRECATED_NORMAL;
4039 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4040 || decl == error_mark_node)
4041 return error_mark_node;
4043 type = TREE_TYPE (decl);
4045 context = DECL_CONTEXT (decl);
4049 *pushed_scope_p = push_scope (context);
4051 /* We are only interested in class contexts, later. */
4052 if (TREE_CODE (context) == NAMESPACE_DECL)
4053 context = NULL_TREE;
4057 /* Is it valid for this decl to have an initializer at all?
4058 If not, set INITIALIZED to zero, which will indirectly
4059 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4060 switch (TREE_CODE (decl))
4063 error ("typedef %qD is initialized (use decltype instead)", decl);
4064 return error_mark_node;
4067 if (initialized == SD_DELETED)
4068 /* We'll handle the rest of the semantics later, but we need to
4069 set this now so it's visible to duplicate_decls. */
4070 DECL_DELETED_FN (decl) = 1;
4079 if (! toplevel_bindings_p ()
4080 && DECL_EXTERNAL (decl))
4081 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4083 DECL_EXTERNAL (decl) = 0;
4084 if (toplevel_bindings_p ())
4085 TREE_STATIC (decl) = 1;
4088 /* If this is a typedef that names the class for linkage purposes
4089 (7.1.3p8), apply any attributes directly to the type. */
4090 if (TREE_CODE (decl) == TYPE_DECL
4091 && TAGGED_TYPE_P (TREE_TYPE (decl))
4092 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4093 flags = ATTR_FLAG_TYPE_IN_PLACE;
4097 /* Set attributes here so if duplicate decl, will have proper attributes. */
4098 cplus_decl_attributes (&decl, attributes, flags);
4100 /* Dllimported symbols cannot be defined. Static data members (which
4101 can be initialized in-class and dllimported) go through grokfield,
4102 not here, so we don't need to exclude those decls when checking for
4104 if (initialized && DECL_DLLIMPORT_P (decl))
4106 error ("definition of %q#D is marked %<dllimport%>", decl);
4107 DECL_DLLIMPORT_P (decl) = 0;
4110 /* If #pragma weak was used, mark the decl weak now. */
4111 maybe_apply_pragma_weak (decl);
4113 if (TREE_CODE (decl) == FUNCTION_DECL
4114 && DECL_DECLARED_INLINE_P (decl)
4115 && DECL_UNINLINABLE (decl)
4116 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4117 warning (0, "inline function %q+D given attribute noinline", decl);
4119 if (context && COMPLETE_TYPE_P (complete_type (context)))
4121 if (TREE_CODE (decl) == VAR_DECL)
4123 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4124 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4125 error ("%q#D is not a static member of %q#T", decl, context);
4128 if (DECL_CONTEXT (field) != context)
4130 if (!same_type_p (DECL_CONTEXT (field), context))
4131 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4132 "to be defined as %<%T::%D%>",
4133 DECL_CONTEXT (field), DECL_NAME (decl),
4134 context, DECL_NAME (decl));
4135 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4137 if (processing_specialization
4138 && template_class_depth (context) == 0
4139 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4140 error ("template header not allowed in member definition "
4141 "of explicitly specialized class");
4142 /* Static data member are tricky; an in-class initialization
4143 still doesn't provide a definition, so the in-class
4144 declaration will have DECL_EXTERNAL set, but will have an
4145 initialization. Thus, duplicate_decls won't warn
4146 about this situation, and so we check here. */
4147 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4148 error ("duplicate initialization of %qD", decl);
4149 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4155 tree field = check_classfn (context, decl,
4156 (processing_template_decl
4157 > template_class_depth (context))
4158 ? current_template_parms
4160 if (field && field != error_mark_node
4161 && duplicate_decls (decl, field,
4162 /*newdecl_is_friend=*/false))
4166 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4167 DECL_IN_AGGR_P (decl) = 0;
4168 /* Do not mark DECL as an explicit specialization if it was not
4169 already marked as an instantiation; a declaration should
4170 never be marked as a specialization unless we know what
4171 template is being specialized. */
4172 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4174 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4176 /* [temp.expl.spec] An explicit specialization of a static data
4177 member of a template is a definition if the declaration
4178 includes an initializer; otherwise, it is a declaration.
4180 We check for processing_specialization so this only applies
4181 to the new specialization syntax. */
4182 if (!initialized && processing_specialization)
4183 DECL_EXTERNAL (decl) = 1;
4186 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4187 permerror (input_location, "declaration of %q#D outside of class is not definition",
4191 was_public = TREE_PUBLIC (decl);
4193 /* Enter this declaration into the symbol table. */
4194 decl = maybe_push_decl (decl);
4196 if (processing_template_decl)
4197 decl = push_template_decl (decl);
4198 if (decl == error_mark_node)
4199 return error_mark_node;
4201 /* Tell the back end to use or not use .common as appropriate. If we say
4202 -fconserve-space, we want this to save .data space, at the expense of
4203 wrong semantics. If we say -fno-conserve-space, we want this to
4204 produce errors about redefs; to do this we force variables into the
4206 if (flag_conserve_space
4207 && TREE_CODE (decl) == VAR_DECL
4208 && TREE_PUBLIC (decl)
4209 && !DECL_THREAD_LOCAL_P (decl)
4210 && !have_global_bss_p ())
4211 DECL_COMMON (decl) = 1;
4213 if (TREE_CODE (decl) == VAR_DECL
4214 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4215 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4217 /* This is a const variable with implicit 'static'. Set
4218 DECL_THIS_STATIC so we can tell it from variables that are
4219 !TREE_PUBLIC because of the anonymous namespace. */
4220 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4221 DECL_THIS_STATIC (decl) = 1;
4224 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4225 start_decl_1 (decl, initialized);
4230 /* Process the declaration of a variable DECL. INITIALIZED is true
4231 iff DECL is explicitly initialized. (INITIALIZED is false if the
4232 variable is initialized via an implicitly-called constructor.)
4233 This function must be called for ordinary variables (including, for
4234 example, implicit instantiations of templates), but must not be
4235 called for template declarations. */
4238 start_decl_1 (tree decl, bool initialized)
4242 bool aggregate_definition_p;
4244 gcc_assert (!processing_template_decl);
4246 if (error_operand_p (decl))
4249 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4251 type = TREE_TYPE (decl);
4252 complete_p = COMPLETE_TYPE_P (type);
4253 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4255 /* If an explicit initializer is present, or if this is a definition
4256 of an aggregate, then we need a complete type at this point.
4257 (Scalars are always complete types, so there is nothing to
4258 check.) This code just sets COMPLETE_P; errors (if necessary)
4259 are issued below. */
4260 if ((initialized || aggregate_definition_p)
4262 && COMPLETE_TYPE_P (complete_type (type)))
4265 /* We will not yet have set TREE_READONLY on DECL if the type
4266 was "const", but incomplete, before this point. But, now, we
4267 have a complete type, so we can try again. */
4268 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4272 /* Is it valid for this decl to have an initializer at all? */
4274 /* Don't allow initializations for incomplete types except for
4275 arrays which might be completed by the initialization. */
4277 ; /* A complete type is ok. */
4278 else if (type_uses_auto (type))
4279 ; /* An auto type is ok. */
4280 else if (TREE_CODE (type) != ARRAY_TYPE)
4282 error ("variable %q#D has initializer but incomplete type", decl);
4283 type = TREE_TYPE (decl) = error_mark_node;
4285 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4287 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4288 error ("elements of array %q#D have incomplete type", decl);
4289 /* else we already gave an error in start_decl. */
4292 else if (aggregate_definition_p && !complete_p)
4294 if (type_uses_auto (type))
4295 error ("declaration of %q#D has no initializer", decl);
4297 error ("aggregate %q#D has incomplete type and cannot be defined",
4299 /* Change the type so that assemble_variable will give
4300 DECL an rtl we can live with: (mem (const_int 0)). */
4301 type = TREE_TYPE (decl) = error_mark_node;
4304 /* Create a new scope to hold this declaration if necessary.
4305 Whether or not a new scope is necessary cannot be determined
4306 until after the type has been completed; if the type is a
4307 specialization of a class template it is not until after
4308 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4309 will be set correctly. */
4310 maybe_push_cleanup_level (type);
4313 /* Handle initialization of references. DECL, TYPE, and INIT have the
4314 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4315 but will be set to a new CLEANUP_STMT if a temporary is created
4316 that must be destroyed subsequently.
4318 Returns an initializer expression to use to initialize DECL, or
4319 NULL if the initialization can be performed statically.
4321 Quotes on semantics can be found in ARM 8.4.3. */
4324 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4328 if (init == NULL_TREE)
4330 if ((DECL_LANG_SPECIFIC (decl) == 0
4331 || DECL_IN_AGGR_P (decl) == 0)
4332 && ! DECL_THIS_EXTERN (decl))
4333 error ("%qD declared as reference but not initialized", decl);
4337 if (TREE_CODE (init) == CONSTRUCTOR)
4339 error ("ISO C++ forbids use of initializer list to "
4340 "initialize reference %qD", decl);
4344 if (TREE_CODE (init) == TREE_LIST)
4345 init = build_x_compound_expr_from_list (init, "initializer");
4347 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4348 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4349 /* Note: default conversion is only called in very special cases. */
4350 init = decay_conversion (init);
4352 /* Convert INIT to the reference type TYPE. This may involve the
4353 creation of a temporary, whose lifetime must be the same as that
4354 of the reference. If so, a DECL_EXPR for the temporary will be
4355 added just after the DECL_EXPR for DECL. That's why we don't set
4356 DECL_INITIAL for local references (instead assigning to them
4357 explicitly); we need to allow the temporary to be initialized
4359 tmp = initialize_reference (type, init, decl, cleanup);
4361 if (tmp == error_mark_node)
4363 else if (tmp == NULL_TREE)
4365 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4369 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4372 DECL_INITIAL (decl) = tmp;
4377 /* Subroutine of check_initializer. We're initializing a DECL of
4378 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4379 extend the lifetime of the underlying array to match that of the decl,
4380 just like for reference initialization. CLEANUP is as for
4381 grok_reference_init. */
4384 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4386 tree aggr_init, array, arrtype;
4387 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4388 aggr_init = TARGET_EXPR_INITIAL (init);
4389 init = build2 (INIT_EXPR, type, decl, init);
4391 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4392 arrtype = TREE_TYPE (array);
4394 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4395 array = TREE_OPERAND (array, 0);
4396 /* If the array is constant, finish_compound_literal already made it a
4397 static variable and we don't need to do anything here. */
4398 if (decl && TREE_CODE (array) == TARGET_EXPR)
4401 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4402 var = build_address (var);
4403 var = convert (arrtype, var);
4404 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4405 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4410 /* Designated initializers in arrays are not supported in GNU C++.
4411 The parser cannot detect this error since it does not know whether
4412 a given brace-enclosed initializer is for a class type or for an
4413 array. This function checks that CE does not use a designated
4414 initializer. If it does, an error is issued. Returns true if CE
4415 is valid, i.e., does not have a designated initializer. */
4418 check_array_designated_initializer (const constructor_elt *ce)
4420 /* Designated initializers for array elements are not supported. */
4423 /* The parser only allows identifiers as designated
4425 if (ce->index == error_mark_node)
4426 error ("name used in a GNU-style designated "
4427 "initializer for an array");
4430 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4431 error ("name %qD used in a GNU-style designated "
4432 "initializer for an array", ce->index);
4440 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4441 array until we finish parsing the initializer. If that's the
4442 situation we're in, update DECL accordingly. */
4445 maybe_deduce_size_from_array_init (tree decl, tree init)
4447 tree type = TREE_TYPE (decl);
4449 if (TREE_CODE (type) == ARRAY_TYPE
4450 && TYPE_DOMAIN (type) == NULL_TREE
4451 && TREE_CODE (decl) != TYPE_DECL)
4453 /* do_default is really a C-ism to deal with tentative definitions.
4454 But let's leave it here to ease the eventual merge. */
4455 int do_default = !DECL_EXTERNAL (decl);
4456 tree initializer = init ? init : DECL_INITIAL (decl);
4459 /* Check that there are no designated initializers in INIT, as
4460 those are not supported in GNU C++, and as the middle-end
4461 will crash if presented with a non-numeric designated
4463 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4465 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4466 constructor_elt *ce;
4469 VEC_iterate (constructor_elt, v, i, ce);
4471 if (!check_array_designated_initializer (ce))
4477 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4481 error ("initializer fails to determine size of %qD", decl);
4482 TREE_TYPE (decl) = error_mark_node;
4484 else if (failure == 2)
4488 error ("array size missing in %qD", decl);
4489 TREE_TYPE (decl) = error_mark_node;
4491 /* If a `static' var's size isn't known, make it extern as
4492 well as static, so it does not get allocated. If it's not
4493 `static', then don't mark it extern; finish_incomplete_decl
4494 will give it a default size and it will get allocated. */
4495 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4496 DECL_EXTERNAL (decl) = 1;
4498 else if (failure == 3)
4500 error ("zero-size array %qD", decl);
4501 TREE_TYPE (decl) = error_mark_node;
4505 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4507 relayout_decl (decl);
4511 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4512 any appropriate error messages regarding the layout. */
4515 layout_var_decl (tree decl)
4519 type = TREE_TYPE (decl);
4520 if (type == error_mark_node)
4523 /* If we haven't already layed out this declaration, do so now.
4524 Note that we must not call complete type for an external object
4525 because it's type might involve templates that we are not
4526 supposed to instantiate yet. (And it's perfectly valid to say
4527 `extern X x' for some incomplete type `X'.) */
4528 if (!DECL_EXTERNAL (decl))
4529 complete_type (type);
4530 if (!DECL_SIZE (decl)
4531 && TREE_TYPE (decl) != error_mark_node
4532 && (COMPLETE_TYPE_P (type)
4533 || (TREE_CODE (type) == ARRAY_TYPE
4534 && !TYPE_DOMAIN (type)
4535 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4536 layout_decl (decl, 0);
4538 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4540 /* An automatic variable with an incomplete type: that is an error.
4541 Don't talk about array types here, since we took care of that
4542 message in grokdeclarator. */
4543 error ("storage size of %qD isn't known", decl);
4544 TREE_TYPE (decl) = error_mark_node;
4547 /* Keep this code around in case we later want to control debug info
4548 based on whether a type is "used". (jason 1999-11-11) */
4550 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4551 /* Let debugger know it should output info for this type. */
4552 note_debug_info_needed (ttype);
4554 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4555 note_debug_info_needed (DECL_CONTEXT (decl));
4558 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4559 && DECL_SIZE (decl) != NULL_TREE
4560 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4562 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4563 constant_expression_warning (DECL_SIZE (decl));
4566 error ("storage size of %qD isn't constant", decl);
4567 TREE_TYPE (decl) = error_mark_node;
4572 /* If a local static variable is declared in an inline function, or if
4573 we have a weak definition, we must endeavor to create only one
4574 instance of the variable at link-time. */
4577 maybe_commonize_var (tree decl)
4579 /* Static data in a function with comdat linkage also has comdat
4581 if (TREE_STATIC (decl)
4582 /* Don't mess with __FUNCTION__. */
4583 && ! DECL_ARTIFICIAL (decl)
4584 && DECL_FUNCTION_SCOPE_P (decl)
4585 /* Unfortunately, import_export_decl has not always been called
4586 before the function is processed, so we cannot simply check
4588 && (DECL_COMDAT (DECL_CONTEXT (decl))
4589 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4590 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4591 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4595 /* With weak symbols, we simply make the variable COMDAT;
4596 that will cause copies in multiple translations units to
4598 comdat_linkage (decl);
4602 if (DECL_INITIAL (decl) == NULL_TREE
4603 || DECL_INITIAL (decl) == error_mark_node)
4605 /* Without weak symbols, we can use COMMON to merge
4606 uninitialized variables. */
4607 TREE_PUBLIC (decl) = 1;
4608 DECL_COMMON (decl) = 1;
4612 /* While for initialized variables, we must use internal
4613 linkage -- which means that multiple copies will not
4615 TREE_PUBLIC (decl) = 0;
4616 DECL_COMMON (decl) = 0;
4617 warning (0, "sorry: semantics of inline function static "
4618 "data %q+#D are wrong (you'll wind up "
4619 "with multiple copies)", decl);
4620 warning (0, "%J you can work around this by removing "
4626 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4627 /* Set it up again; we might have set DECL_INITIAL since the last
4629 comdat_linkage (decl);
4632 /* Issue an error message if DECL is an uninitialized const variable. */
4635 check_for_uninitialized_const_var (tree decl)
4637 tree type = TREE_TYPE (decl);
4639 /* ``Unless explicitly declared extern, a const object does not have
4640 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4642 if (TREE_CODE (decl) == VAR_DECL
4643 && TREE_CODE (type) != REFERENCE_TYPE
4644 && CP_TYPE_CONST_P (type)
4645 && !TYPE_NEEDS_CONSTRUCTING (type)
4646 && !DECL_INITIAL (decl))
4647 error ("uninitialized const %qD", decl);
4651 /* Structure holding the current initializer being processed by reshape_init.
4652 CUR is a pointer to the current element being processed, END is a pointer
4653 after the last element present in the initializer. */
4654 typedef struct reshape_iterator_t
4656 constructor_elt *cur;
4657 constructor_elt *end;
4660 static tree reshape_init_r (tree, reshape_iter *, bool);
4662 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4663 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4664 initialized. If there are no more such fields, the return value
4668 next_initializable_field (tree field)
4671 && (TREE_CODE (field) != FIELD_DECL
4672 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4673 || DECL_ARTIFICIAL (field)))
4674 field = TREE_CHAIN (field);
4679 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4680 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4681 INTEGER_CST representing the size of the array minus one (the maximum index),
4682 or NULL_TREE if the array was declared without specifying the size. D is
4683 the iterator within the constructor. */
4686 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4689 bool sized_array_p = (max_index != NULL_TREE);
4690 unsigned HOST_WIDE_INT max_index_cst = 0;
4691 unsigned HOST_WIDE_INT index;
4693 /* The initializer for an array is always a CONSTRUCTOR. */
4694 new_init = build_constructor (init_list_type_node, NULL);
4698 /* Minus 1 is used for zero sized arrays. */
4699 if (integer_all_onesp (max_index))
4702 if (host_integerp (max_index, 1))
4703 max_index_cst = tree_low_cst (max_index, 1);
4704 /* sizetype is sign extended, not zero extended. */
4706 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4710 /* Loop until there are no more initializers. */
4712 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4717 check_array_designated_initializer (d->cur);
4718 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4719 if (elt_init == error_mark_node)
4720 return error_mark_node;
4721 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4727 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4728 Parameters are the same of reshape_init_r. */
4731 reshape_init_array (tree type, reshape_iter *d)
4733 tree max_index = NULL_TREE;
4735 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4737 if (TYPE_DOMAIN (type))
4738 max_index = array_type_nelts (type);
4740 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4743 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4744 Parameters are the same of reshape_init_r. */
4747 reshape_init_vector (tree type, reshape_iter *d)
4749 tree max_index = NULL_TREE;
4752 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4754 if (COMPOUND_LITERAL_P (d->cur->value))
4756 tree value = d->cur->value;
4757 if (!same_type_p (TREE_TYPE (value), type))
4759 error ("invalid type %qT as initializer for a vector of type %qT",
4760 TREE_TYPE (d->cur->value), type);
4761 value = error_mark_node;
4767 /* For a vector, the representation type is a struct
4768 containing a single member which is an array of the
4769 appropriate size. */
4770 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4771 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4772 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4774 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4777 /* Subroutine of reshape_init_r, processes the initializers for classes
4778 or union. Parameters are the same of reshape_init_r. */
4781 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4786 gcc_assert (CLASS_TYPE_P (type));
4788 /* The initializer for a class is always a CONSTRUCTOR. */
4789 new_init = build_constructor (init_list_type_node, NULL);
4790 field = next_initializable_field (TYPE_FIELDS (type));
4796 An initializer for an aggregate member that is an
4797 empty class shall have the form of an empty
4798 initializer-list {}. */
4799 if (!first_initializer_p)
4801 error ("initializer for %qT must be brace-enclosed", type);
4802 return error_mark_node;
4807 /* Loop through the initializable fields, gathering initializers. */
4808 while (d->cur != d->end)
4812 /* Handle designated initializers, as an extension. */
4815 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4817 if (!field || TREE_CODE (field) != FIELD_DECL)
4819 error ("%qT has no non-static data member named %qD", type,
4821 return error_mark_node;
4825 /* If we processed all the member of the class, we are done. */
4829 field_init = reshape_init_r (TREE_TYPE (field), d,
4830 /*first_initializer_p=*/false);
4831 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4835 When a union is initialized with a brace-enclosed
4836 initializer, the braces shall only contain an
4837 initializer for the first member of the union. */
4838 if (TREE_CODE (type) == UNION_TYPE)
4841 field = next_initializable_field (TREE_CHAIN (field));
4847 /* Subroutine of reshape_init, which processes a single initializer (part of
4848 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4849 iterator within the CONSTRUCTOR which points to the initializer to process.
4850 FIRST_INITIALIZER_P is true if this is the first initializer of the
4851 CONSTRUCTOR node. */
4854 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4856 tree init = d->cur->value;
4858 if (error_operand_p (init))
4859 return error_mark_node;
4861 /* A non-aggregate type is always initialized with a single
4863 if (!CP_AGGREGATE_TYPE_P (type))
4865 /* It is invalid to initialize a non-aggregate type with a
4866 brace-enclosed initializer before C++0x.
4867 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4868 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4869 a CONSTRUCTOR (with a record type). */
4870 if (TREE_CODE (init) == CONSTRUCTOR
4871 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4873 if (SCALAR_TYPE_P (type))
4875 error ("braces around scalar initializer for type %qT", type);
4876 init = error_mark_node;
4879 maybe_warn_cpp0x ("extended initializer lists");
4888 All implicit type conversions (clause _conv_) are considered when
4889 initializing the aggregate member with an initializer from an
4890 initializer-list. If the initializer can initialize a member,
4891 the member is initialized. Otherwise, if the member is itself a
4892 non-empty subaggregate, brace elision is assumed and the
4893 initializer is considered for the initialization of the first
4894 member of the subaggregate. */
4895 if (TREE_CODE (init) != CONSTRUCTOR
4896 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4902 /* [dcl.init.string]
4904 A char array (whether plain char, signed char, or unsigned char)
4905 can be initialized by a string-literal (optionally enclosed in
4906 braces); a wchar_t array can be initialized by a wide
4907 string-literal (optionally enclosed in braces). */
4908 if (TREE_CODE (type) == ARRAY_TYPE
4909 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4911 tree str_init = init;
4913 /* Strip one level of braces if and only if they enclose a single
4914 element (as allowed by [dcl.init.string]). */
4915 if (!first_initializer_p
4916 && TREE_CODE (str_init) == CONSTRUCTOR
4917 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4919 str_init = VEC_index (constructor_elt,
4920 CONSTRUCTOR_ELTS (str_init), 0)->value;
4923 /* If it's a string literal, then it's the initializer for the array
4924 as a whole. Otherwise, continue with normal initialization for
4925 array types (one value per array element). */
4926 if (TREE_CODE (str_init) == STRING_CST)
4933 /* The following cases are about aggregates. If we are not within a full
4934 initializer already, and there is not a CONSTRUCTOR, it means that there
4935 is a missing set of braces (that is, we are processing the case for
4936 which reshape_init exists). */
4937 if (!first_initializer_p)
4939 if (TREE_CODE (init) == CONSTRUCTOR)
4941 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4942 /* There is no need to reshape pointer-to-member function
4943 initializers, as they are always constructed correctly
4944 by the front end. */
4946 else if (COMPOUND_LITERAL_P (init))
4947 /* For a nested compound literal, there is no need to reshape since
4948 brace elision is not allowed. Even if we decided to allow it,
4949 we should add a call to reshape_init in finish_compound_literal,
4950 before calling digest_init, so changing this code would still
4951 not be necessary. */
4952 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4956 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4957 return reshape_init (type, init);
4961 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4965 /* Dispatch to specialized routines. */
4966 if (CLASS_TYPE_P (type))
4967 return reshape_init_class (type, d, first_initializer_p);
4968 else if (TREE_CODE (type) == ARRAY_TYPE)
4969 return reshape_init_array (type, d);
4970 else if (TREE_CODE (type) == VECTOR_TYPE)
4971 return reshape_init_vector (type, d);
4976 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4977 brace-enclosed aggregate initializer.
4979 INIT is the CONSTRUCTOR containing the list of initializers describing
4980 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4981 It may not presently match the shape of the TYPE; for example:
4983 struct S { int a; int b; };
4984 struct S a[] = { 1, 2, 3, 4 };
4986 Here INIT will hold a VEC of four elements, rather than a
4987 VEC of two elements, each itself a VEC of two elements. This
4988 routine transforms INIT from the former form into the latter. The
4989 revised CONSTRUCTOR node is returned. */
4992 reshape_init (tree type, tree init)
4994 VEC(constructor_elt, gc) *v;
4998 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5000 v = CONSTRUCTOR_ELTS (init);
5002 /* An empty constructor does not need reshaping, and it is always a valid
5004 if (VEC_empty (constructor_elt, v))
5007 /* Recurse on this CONSTRUCTOR. */
5008 d.cur = VEC_index (constructor_elt, v, 0);
5009 d.end = d.cur + VEC_length (constructor_elt, v);
5011 new_init = reshape_init_r (type, &d, true);
5012 if (new_init == error_mark_node)
5013 return error_mark_node;
5015 /* Make sure all the element of the constructor were used. Otherwise,
5016 issue an error about exceeding initializers. */
5018 error ("too many initializers for %qT", type);
5023 /* Verify array initializer. Returns true if errors have been reported. */
5026 check_array_initializer (tree decl, tree type, tree init)
5028 tree element_type = TREE_TYPE (type);
5030 /* The array type itself need not be complete, because the
5031 initializer may tell us how many elements are in the array.
5032 But, the elements of the array must be complete. */
5033 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5036 error ("elements of array %q#D have incomplete type", decl);
5038 error ("elements of array %q#T have incomplete type", type);
5041 /* It is not valid to initialize a VLA. */
5043 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5044 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5047 error ("variable-sized object %qD may not be initialized", decl);
5049 error ("variable-sized compound literal");
5055 /* Subroutine of check_initializer; args are passed down from that function.
5056 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5059 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5062 int saved_stmts_are_full_exprs_p = 0;
5063 if (building_stmt_tree ())
5065 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5066 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5068 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5069 if (building_stmt_tree ())
5070 current_stmt_tree ()->stmts_are_full_exprs_p =
5071 saved_stmts_are_full_exprs_p;
5075 /* Verify INIT (the initializer for DECL), and record the
5076 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5077 grok_reference_init.
5079 If the return value is non-NULL, it is an expression that must be
5080 evaluated dynamically to initialize DECL. */
5083 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5085 tree type = TREE_TYPE (decl);
5086 tree init_code = NULL;
5088 /* Things that are going to be initialized need to have complete
5090 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5092 if (type == error_mark_node)
5093 /* We will have already complained. */
5096 if (TREE_CODE (type) == ARRAY_TYPE)
5098 if (check_array_initializer (decl, type, init))
5101 else if (!COMPLETE_TYPE_P (type))
5103 error ("%qD has incomplete type", decl);
5104 TREE_TYPE (decl) = error_mark_node;
5108 /* There is no way to make a variable-sized class type in GNU C++. */
5109 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5111 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5113 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5114 if (SCALAR_TYPE_P (type))
5118 maybe_warn_cpp0x ("extended initializer lists");
5119 init = build_zero_init (type, NULL_TREE, false);
5121 else if (init_len != 1)
5123 error ("scalar object %qD requires one element in initializer",
5125 TREE_TYPE (decl) = error_mark_node;
5131 if (TREE_CODE (decl) == CONST_DECL)
5133 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5135 DECL_INITIAL (decl) = init;
5137 gcc_assert (init != NULL_TREE);
5140 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5141 init = grok_reference_init (decl, type, init, cleanup);
5144 /* Do not reshape constructors of vectors (they don't need to be
5146 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5148 if (is_std_init_list (type))
5149 return build_init_list_var_init (decl, type, init, cleanup);
5150 else if (TYPE_NON_AGGREGATE_CLASS (type))
5152 /* Don't reshape if the class has constructors. */
5153 if (cxx_dialect == cxx98)
5154 error ("in C++98 %qD must be initialized by constructor, "
5157 init = build_tree_list (NULL_TREE, init);
5159 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5161 error ("opaque vector types cannot be initialized");
5162 init = error_mark_node;
5165 init = reshape_init (type, init);
5168 /* If DECL has an array type without a specific bound, deduce the
5169 array size from the initializer. */
5170 maybe_deduce_size_from_array_init (decl, init);
5171 type = TREE_TYPE (decl);
5172 if (type == error_mark_node)
5175 if (TYPE_NEEDS_CONSTRUCTING (type)
5176 || (CLASS_TYPE_P (type)
5177 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5178 return build_aggr_init_full_exprs (decl, init, flags);
5179 else if (TREE_CODE (init) != TREE_VEC)
5181 init_code = store_init_value (decl, init, flags);
5182 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5183 && DECL_INITIAL (decl)
5184 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5185 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5186 warning (0, "array %qD initialized by parenthesized string literal %qE",
5187 decl, DECL_INITIAL (decl));
5191 else if (DECL_EXTERNAL (decl))
5193 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5194 return build_aggr_init_full_exprs (decl, init, flags);
5195 else if (MAYBE_CLASS_TYPE_P (type))
5197 tree core_type = strip_array_types (type);
5199 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5200 error ("structure %qD with uninitialized const members", decl);
5201 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5202 error ("structure %qD with uninitialized reference members", decl);
5204 check_for_uninitialized_const_var (decl);
5207 check_for_uninitialized_const_var (decl);
5209 if (init && init != error_mark_node)
5210 init_code = build2 (INIT_EXPR, type, decl, init);
5215 /* If DECL is not a local variable, give it RTL. */
5218 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5220 int toplev = toplevel_bindings_p ();
5222 const char *filename;
5224 /* Set the DECL_ASSEMBLER_NAME for the object. */
5227 /* The `register' keyword, when used together with an
5228 asm-specification, indicates that the variable should be
5229 placed in a particular register. */
5230 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5232 set_user_assembler_name (decl, asmspec);
5233 DECL_HARD_REGISTER (decl) = 1;
5237 if (TREE_CODE (decl) == FUNCTION_DECL
5238 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5239 set_builtin_user_assembler_name (decl, asmspec);
5240 set_user_assembler_name (decl, asmspec);
5244 /* Handle non-variables up front. */
5245 if (TREE_CODE (decl) != VAR_DECL)
5247 rest_of_decl_compilation (decl, toplev, at_eof);
5251 /* If we see a class member here, it should be a static data
5253 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5255 gcc_assert (TREE_STATIC (decl));
5256 /* An in-class declaration of a static data member should be
5257 external; it is only a declaration, and not a definition. */
5258 if (init == NULL_TREE)
5259 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5262 /* We don't create any RTL for local variables. */
5263 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5266 /* We defer emission of local statics until the corresponding
5267 DECL_EXPR is expanded. */
5268 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5270 /* We try to defer namespace-scope static constants so that they are
5271 not emitted into the object file unnecessarily. */
5272 filename = input_filename;
5273 if (!DECL_VIRTUAL_P (decl)
5274 && TREE_READONLY (decl)
5275 && DECL_INITIAL (decl) != NULL_TREE
5276 && DECL_INITIAL (decl) != error_mark_node
5278 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5280 && !TREE_PUBLIC (decl))
5282 /* Fool with the linkage of static consts according to #pragma
5284 struct c_fileinfo *finfo = get_fileinfo (filename);
5285 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5287 TREE_PUBLIC (decl) = 1;
5288 DECL_EXTERNAL (decl) = finfo->interface_only;
5293 /* Likewise for template instantiations. */
5294 else if (DECL_LANG_SPECIFIC (decl)
5295 && DECL_IMPLICIT_INSTANTIATION (decl))
5298 /* If we're not deferring, go ahead and assemble the variable. */
5300 rest_of_decl_compilation (decl, toplev, at_eof);
5303 /* walk_tree helper for wrap_temporary_cleanups, below. */
5306 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5308 if (TYPE_P (*stmt_p))
5314 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5316 tree guard = (tree)data;
5317 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5319 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5320 /* Tell honor_protect_cleanup_actions to handle this as a separate
5322 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5324 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5330 /* We're initializing a local variable which has a cleanup GUARD. If there
5331 are any temporaries used in the initializer INIT of this variable, we
5332 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5333 variable will be cleaned up properly if one of them throws.
5335 Unfortunately, there's no way to express this properly in terms of
5336 nesting, as the regions for the temporaries overlap the region for the
5337 variable itself; if there are two temporaries, the variable needs to be
5338 the first thing destroyed if either of them throws. However, we only
5339 want to run the variable's cleanup if it actually got constructed. So
5340 we need to guard the temporary cleanups with the variable's cleanup if
5341 they are run on the normal path, but not if they are run on the
5342 exceptional path. We implement this by telling
5343 honor_protect_cleanup_actions to strip the variable cleanup from the
5344 exceptional path. */
5347 wrap_temporary_cleanups (tree init, tree guard)
5349 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5352 /* Generate code to initialize DECL (a local variable). */
5355 initialize_local_var (tree decl, tree init)
5357 tree type = TREE_TYPE (decl);
5361 gcc_assert (TREE_CODE (decl) == VAR_DECL
5362 || TREE_CODE (decl) == RESULT_DECL);
5363 gcc_assert (!TREE_STATIC (decl));
5365 if (DECL_SIZE (decl) == NULL_TREE)
5367 /* If we used it already as memory, it must stay in memory. */
5368 DECL_INITIAL (decl) = NULL_TREE;
5369 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5373 if (type == error_mark_node)
5376 /* Compute and store the initial value. */
5377 already_used = TREE_USED (decl) || TREE_USED (type);
5379 /* Generate a cleanup, if necessary. */
5380 cleanup = cxx_maybe_build_cleanup (decl);
5382 /* Perform the initialization. */
5385 int saved_stmts_are_full_exprs_p;
5387 /* If we're only initializing a single object, guard the destructors
5388 of any temporaries used in its initializer with its destructor.
5389 This isn't right for arrays because each element initialization is
5390 a full-expression. */
5391 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5392 wrap_temporary_cleanups (init, cleanup);
5394 gcc_assert (building_stmt_tree ());
5395 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5396 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5397 finish_expr_stmt (init);
5398 current_stmt_tree ()->stmts_are_full_exprs_p =
5399 saved_stmts_are_full_exprs_p;
5402 /* Set this to 0 so we can tell whether an aggregate which was
5403 initialized was ever used. Don't do this if it has a
5404 destructor, so we don't complain about the 'resource
5405 allocation is initialization' idiom. Now set
5406 attribute((unused)) on types so decls of that type will be
5407 marked used. (see TREE_USED, above.) */
5408 if (TYPE_NEEDS_CONSTRUCTING (type)
5410 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5411 && DECL_NAME (decl))
5412 TREE_USED (decl) = 0;
5413 else if (already_used)
5414 TREE_USED (decl) = 1;
5417 finish_decl_cleanup (decl, cleanup);
5420 /* DECL is a VAR_DECL for a compiler-generated variable with static
5421 storage duration (like a virtual table) whose initializer is a
5422 compile-time constant. INIT must be either a TREE_LIST of values,
5423 or a CONSTRUCTOR. Initialize the variable and provide it to the
5427 initialize_artificial_var (tree decl, tree init)
5429 gcc_assert (DECL_ARTIFICIAL (decl));
5430 if (TREE_CODE (init) == TREE_LIST)
5431 init = build_constructor_from_list (TREE_TYPE (decl), init);
5432 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5433 DECL_INITIAL (decl) = init;
5434 DECL_INITIALIZED_P (decl) = 1;
5435 determine_visibility (decl);
5436 layout_var_decl (decl);
5437 maybe_commonize_var (decl);
5438 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5441 /* INIT is the initializer for a variable, as represented by the
5442 parser. Returns true iff INIT is value-dependent. */
5445 value_dependent_init_p (tree init)
5447 if (TREE_CODE (init) == TREE_LIST)
5448 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5449 return any_value_dependent_elements_p (init);
5450 else if (TREE_CODE (init) == CONSTRUCTOR)
5451 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5453 VEC(constructor_elt, gc) *elts;
5457 elts = CONSTRUCTOR_ELTS (init);
5458 nelts = VEC_length (constructor_elt, elts);
5459 for (i = 0; i < nelts; ++i)
5460 if (value_dependent_init_p (VEC_index (constructor_elt,
5465 /* It must be a simple expression, e.g., int i = 3; */
5466 return value_dependent_expression_p (init);
5471 /* Finish processing of a declaration;
5472 install its line number and initial value.
5473 If the length of an array type is not known before,
5474 it must be determined now, from the initial value, or it is an error.
5476 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5477 true, then INIT is an integral constant expression.
5479 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5480 if the (init) syntax was used. */
5483 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5484 tree asmspec_tree, int flags)
5488 const char *asmspec = NULL;
5489 int was_readonly = 0;
5490 bool var_definition_p = false;
5491 int saved_processing_template_decl;
5494 if (decl == error_mark_node)
5499 error ("assignment (not initialization) in declaration");
5503 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5504 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5505 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5507 type = TREE_TYPE (decl);
5508 if (type == error_mark_node)
5511 /* Assume no cleanup is required. */
5512 cleanup = NULL_TREE;
5513 saved_processing_template_decl = processing_template_decl;
5515 /* If a name was specified, get the string. */
5516 if (global_scope_p (current_binding_level))
5517 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5518 if (asmspec_tree && asmspec_tree != error_mark_node)
5519 asmspec = TREE_STRING_POINTER (asmspec_tree);
5521 if (current_class_type
5522 && CP_DECL_CONTEXT (decl) == current_class_type
5523 && TYPE_BEING_DEFINED (current_class_type)
5524 && (DECL_INITIAL (decl) || init))
5525 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5527 auto_node = type_uses_auto (type);
5530 if (init == NULL_TREE)
5532 error ("declaration of %q#D has no initializer", decl);
5533 TREE_TYPE (decl) = error_mark_node;
5536 if (TREE_CODE (init) == TREE_LIST)
5537 init = build_x_compound_expr_from_list (init, "initializer");
5538 if (describable_type (init))
5540 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5541 if (type == error_mark_node)
5546 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5548 if (init == ridpointers[(int)RID_DELETE])
5550 /* FIXME check this is 1st decl. */
5551 DECL_DELETED_FN (decl) = 1;
5552 DECL_DECLARED_INLINE_P (decl) = 1;
5553 DECL_INITIAL (decl) = error_mark_node;
5556 else if (init == ridpointers[(int)RID_DEFAULT])
5558 if (!defaultable_fn_p (decl))
5560 error ("%qD cannot be defaulted", decl);
5561 DECL_INITIAL (decl) = NULL_TREE;
5564 DECL_DEFAULTED_FN (decl) = 1;
5568 if (processing_template_decl)
5570 bool type_dependent_p;
5572 /* Add this declaration to the statement-tree. */
5573 if (at_function_scope_p ())
5574 add_decl_expr (decl);
5576 type_dependent_p = dependent_type_p (type);
5578 if (check_for_bare_parameter_packs (init))
5581 DECL_INITIAL (decl) = NULL_TREE;
5584 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5586 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5587 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5588 TREE_CONSTANT (decl) = 1;
5591 /* Generally, initializers in templates are expanded when the
5592 template is instantiated. But, if DECL is an integral
5593 constant static data member, then it can be used in future
5594 integral constant expressions, and its value must be
5597 && DECL_CLASS_SCOPE_P (decl)
5598 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5599 && !type_dependent_p
5600 && !value_dependent_init_p (init)))
5603 DECL_INITIAL (decl) = init;
5604 if (TREE_CODE (decl) == VAR_DECL
5605 && !DECL_PRETTY_FUNCTION_P (decl)
5606 && !type_dependent_p)
5607 maybe_deduce_size_from_array_init (decl, init);
5611 if (TREE_CODE (init) == TREE_LIST)
5613 /* If the parenthesized-initializer form was used (e.g.,
5614 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5615 arguments. (There is generally only one.) We convert them
5618 for (; list; list = TREE_CHAIN (list))
5620 tree elt = TREE_VALUE (list);
5621 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5625 init = fold_non_dependent_expr (init);
5626 processing_template_decl = 0;
5629 /* Take care of TYPE_DECLs up front. */
5630 if (TREE_CODE (decl) == TYPE_DECL)
5632 if (type != error_mark_node
5633 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5635 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5636 warning (0, "shadowing previous type declaration of %q#D", decl);
5637 set_identifier_type_value (DECL_NAME (decl), decl);
5640 /* If we have installed this as the canonical typedef for this
5641 type, and that type has not been defined yet, delay emitting
5642 the debug information for it, as we will emit it later. */
5643 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5644 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5645 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5647 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5652 /* A reference will be modified here, as it is initialized. */
5653 if (! DECL_EXTERNAL (decl)
5654 && TREE_READONLY (decl)
5655 && TREE_CODE (type) == REFERENCE_TYPE)
5658 TREE_READONLY (decl) = 0;
5661 if (TREE_CODE (decl) == VAR_DECL)
5663 /* Only PODs can have thread-local storage. Other types may require
5664 various kinds of non-trivial initialization. */
5665 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5666 error ("%qD cannot be thread-local because it has non-POD type %qT",
5667 decl, TREE_TYPE (decl));
5668 /* If this is a local variable that will need a mangled name,
5669 register it now. We must do this before processing the
5670 initializer for the variable, since the initialization might
5671 require a guard variable, and since the mangled name of the
5672 guard variable will depend on the mangled name of this
5674 if (DECL_FUNCTION_SCOPE_P (decl)
5675 && TREE_STATIC (decl)
5676 && !DECL_ARTIFICIAL (decl))
5677 push_local_name (decl);
5678 /* Convert the initializer to the type of DECL, if we have not
5679 already initialized DECL. */
5680 if (!DECL_INITIALIZED_P (decl)
5681 /* If !DECL_EXTERNAL then DECL is being defined. In the
5682 case of a static data member initialized inside the
5683 class-specifier, there can be an initializer even if DECL
5684 is *not* defined. */
5685 && (!DECL_EXTERNAL (decl) || init))
5687 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5690 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5691 /* Allow libjava/prims.cc define primitive classes. */
5692 if (init != NULL_TREE
5693 || jclass == NULL_TREE
5694 || TREE_CODE (jclass) != TYPE_DECL
5695 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5696 || !same_type_ignoring_top_level_qualifiers_p
5697 (type, TREE_TYPE (TREE_TYPE (jclass))))
5698 error ("Java object %qD not allocated with %<new%>", decl);
5703 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5704 if (init_const_expr_p)
5706 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5707 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5708 TREE_CONSTANT (decl) = 1;
5711 init = check_initializer (decl, init, flags, &cleanup);
5712 /* Thread-local storage cannot be dynamically initialized. */
5713 if (DECL_THREAD_LOCAL_P (decl) && init)
5715 error ("%qD is thread-local and so cannot be dynamically "
5716 "initialized", decl);
5720 /* Check that the initializer for a static data member was a
5721 constant. Although we check in the parser that the
5722 initializer is an integral constant expression, we do not
5723 simplify division-by-zero at the point at which it
5724 occurs. Therefore, in:
5726 struct S { static const int i = 7 / 0; };
5728 we issue an error at this point. It would
5729 probably be better to forbid division by zero in
5730 integral constant expressions. */
5731 if (DECL_EXTERNAL (decl) && init)
5733 error ("%qD cannot be initialized by a non-constant expression"
5734 " when being declared", decl);
5735 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5743 The memory occupied by any object of static storage
5744 duration is zero-initialized at program startup before
5745 any other initialization takes place.
5747 We cannot create an appropriate initializer until after
5748 the type of DECL is finalized. If DECL_INITIAL is set,
5749 then the DECL is statically initialized, and any
5750 necessary zero-initialization has already been performed. */
5751 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5752 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5753 /*nelts=*/NULL_TREE,
5754 /*static_storage_p=*/true);
5755 /* Remember that the initialization for this variable has
5757 DECL_INITIALIZED_P (decl) = 1;
5758 /* This declaration is the definition of this variable,
5759 unless we are initializing a static data member within
5760 the class specifier. */
5761 if (!DECL_EXTERNAL (decl))
5762 var_definition_p = true;
5764 /* If the variable has an array type, lay out the type, even if
5765 there is no initializer. It is valid to index through the
5766 array, and we must get TYPE_ALIGN set correctly on the array
5768 else if (TREE_CODE (type) == ARRAY_TYPE)
5771 else if (TREE_CODE (decl) == FIELD_DECL
5772 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5773 error ("non-static data member %qD has Java class type", decl);
5775 /* Add this declaration to the statement-tree. This needs to happen
5776 after the call to check_initializer so that the DECL_EXPR for a
5777 reference temp is added before the DECL_EXPR for the reference itself. */
5778 if (at_function_scope_p ())
5779 add_decl_expr (decl);
5781 /* Let the middle end know about variables and functions -- but not
5782 static data members in uninstantiated class templates. */
5783 if (!saved_processing_template_decl
5784 && (TREE_CODE (decl) == VAR_DECL
5785 || TREE_CODE (decl) == FUNCTION_DECL))
5787 if (TREE_CODE (decl) == VAR_DECL)
5789 layout_var_decl (decl);
5790 maybe_commonize_var (decl);
5793 /* This needs to happen after the linkage is set. */
5794 determine_visibility (decl);
5796 if (var_definition_p && TREE_STATIC (decl))
5798 /* If a TREE_READONLY variable needs initialization
5799 at runtime, it is no longer readonly and we need to
5800 avoid MEM_READONLY_P being set on RTL created for it. */
5803 if (TREE_READONLY (decl))
5804 TREE_READONLY (decl) = 0;
5807 else if (was_readonly)
5808 TREE_READONLY (decl) = 1;
5811 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5813 /* Check for abstractness of the type. Notice that there is no
5814 need to strip array types here since the check for those types
5815 is already done within create_array_type_for_decl. */
5816 if (TREE_CODE (type) == FUNCTION_TYPE
5817 || TREE_CODE (type) == METHOD_TYPE)
5818 abstract_virtuals_error (decl, TREE_TYPE (type));
5820 abstract_virtuals_error (decl, type);
5822 if (TREE_TYPE (decl) == error_mark_node)
5823 /* No initialization required. */
5825 else if (TREE_CODE (decl) == FUNCTION_DECL)
5829 if (init == ridpointers[(int)RID_DEFAULT])
5831 /* An out-of-class default definition is defined at
5832 the point where it is explicitly defaulted. */
5833 if (DECL_INITIAL (decl) == error_mark_node)
5834 synthesize_method (decl);
5837 error ("function %q#D is initialized like a variable", decl);
5839 /* else no initialization required. */
5841 else if (DECL_EXTERNAL (decl)
5842 && ! (DECL_LANG_SPECIFIC (decl)
5843 && DECL_NOT_REALLY_EXTERN (decl)))
5846 DECL_INITIAL (decl) = init;
5848 /* A variable definition. */
5849 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5850 /* Initialize the local variable. */
5851 initialize_local_var (decl, init);
5853 /* If a variable is defined, and then a subsequent
5854 definition with external linkage is encountered, we will
5855 get here twice for the same variable. We want to avoid
5856 calling expand_static_init more than once. For variables
5857 that are not static data members, we can call
5858 expand_static_init only when we actually process the
5859 initializer. It is not legal to redeclare a static data
5860 member, so this issue does not arise in that case. */
5861 else if (var_definition_p && TREE_STATIC (decl))
5862 expand_static_init (decl, init);
5865 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5866 reference, insert it in the statement-tree now. */
5868 push_cleanup (decl, cleanup, false);
5871 processing_template_decl = saved_processing_template_decl;
5874 TREE_READONLY (decl) = 1;
5876 /* If this was marked 'used', be sure it will be output. */
5877 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5878 mark_decl_referenced (decl);
5881 /* This is here for a midend callback from c-common.c. */
5884 finish_decl (tree decl, tree init, tree origtype ATTRIBUTE_UNUSED,
5887 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5890 /* Returns a declaration for a VAR_DECL as if:
5892 extern "C" TYPE NAME;
5894 had been seen. Used to create compiler-generated global
5898 declare_global_var (tree name, tree type)
5902 push_to_top_level ();
5903 decl = build_decl (input_location, VAR_DECL, name, type);
5904 TREE_PUBLIC (decl) = 1;
5905 DECL_EXTERNAL (decl) = 1;
5906 DECL_ARTIFICIAL (decl) = 1;
5907 /* If the user has explicitly declared this variable (perhaps
5908 because the code we are compiling is part of a low-level runtime
5909 library), then it is possible that our declaration will be merged
5910 with theirs by pushdecl. */
5911 decl = pushdecl (decl);
5912 finish_decl (decl, NULL_TREE, NULL_TREE, NULL_TREE);
5913 pop_from_top_level ();
5918 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5919 if "__cxa_atexit" is not being used) corresponding to the function
5920 to be called when the program exits. */
5923 get_atexit_fn_ptr_type (void)
5928 if (!atexit_fn_ptr_type_node)
5930 if (flag_use_cxa_atexit
5931 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5932 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5933 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5935 /* The parameter to "atexit" is "void (*)(void)". */
5936 arg_types = void_list_node;
5938 fn_type = build_function_type (void_type_node, arg_types);
5939 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5942 return atexit_fn_ptr_type_node;
5945 /* Returns a pointer to the `atexit' function. Note that if
5946 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5947 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5950 get_atexit_node (void)
5957 bool use_aeabi_atexit;
5962 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5964 /* The declaration for `__cxa_atexit' is:
5966 int __cxa_atexit (void (*)(void *), void *, void *)
5968 We build up the argument types and then then function type
5971 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5972 /* First, build the pointer-to-function type for the first
5974 fn_ptr_type = get_atexit_fn_ptr_type ();
5975 /* Then, build the rest of the argument types. */
5976 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5977 if (use_aeabi_atexit)
5979 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5980 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5984 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5985 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5987 /* And the final __cxa_atexit type. */
5988 fn_type = build_function_type (integer_type_node, arg_types);
5989 fn_ptr_type = build_pointer_type (fn_type);
5990 if (use_aeabi_atexit)
5991 name = "__aeabi_atexit";
5993 name = "__cxa_atexit";
5997 /* The declaration for `atexit' is:
5999 int atexit (void (*)());
6001 We build up the argument types and then then function type
6003 fn_ptr_type = get_atexit_fn_ptr_type ();
6004 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6005 /* Build the final atexit type. */
6006 fn_type = build_function_type (integer_type_node, arg_types);
6010 /* Now, build the function declaration. */
6011 push_lang_context (lang_name_c);
6012 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6013 mark_used (atexit_fndecl);
6014 pop_lang_context ();
6015 atexit_node = decay_conversion (atexit_fndecl);
6020 /* Returns the __dso_handle VAR_DECL. */
6023 get_dso_handle_node (void)
6025 if (dso_handle_node)
6026 return dso_handle_node;
6028 /* Declare the variable. */
6029 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6032 return dso_handle_node;
6035 /* Begin a new function with internal linkage whose job will be simply
6036 to destroy some particular variable. */
6038 static GTY(()) int start_cleanup_cnt;
6041 start_cleanup_fn (void)
6046 bool use_cxa_atexit = flag_use_cxa_atexit
6047 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6049 push_to_top_level ();
6051 /* No need to mangle this. */
6052 push_lang_context (lang_name_c);
6054 /* Build the name of the function. */
6055 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6056 /* Build the function declaration. */
6057 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6058 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6059 /* It's a function with internal linkage, generated by the
6061 TREE_PUBLIC (fndecl) = 0;
6062 DECL_ARTIFICIAL (fndecl) = 1;
6063 /* Make the function `inline' so that it is only emitted if it is
6064 actually needed. It is unlikely that it will be inlined, since
6065 it is only called via a function pointer, but we avoid unnecessary
6066 emissions this way. */
6067 DECL_DECLARED_INLINE_P (fndecl) = 1;
6068 DECL_INTERFACE_KNOWN (fndecl) = 1;
6069 /* Build the parameter. */
6074 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6075 DECL_CONTEXT (parmdecl) = fndecl;
6076 TREE_USED (parmdecl) = 1;
6077 DECL_ARGUMENTS (fndecl) = parmdecl;
6081 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6083 pop_lang_context ();
6085 return current_function_decl;
6088 /* Finish the cleanup function begun by start_cleanup_fn. */
6091 end_cleanup_fn (void)
6093 expand_or_defer_fn (finish_function (0));
6095 pop_from_top_level ();
6098 /* Generate code to handle the destruction of DECL, an object with
6099 static storage duration. */
6102 register_dtor_fn (tree decl)
6111 type = TREE_TYPE (decl);
6112 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6113 return void_zero_node;
6115 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6116 a class object, we can just pass the destructor to
6117 "__cxa_atexit"; we don't have to build a temporary function to do
6119 use_dtor = (flag_use_cxa_atexit
6120 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6121 && CLASS_TYPE_P (type));
6126 /* Find the destructor. */
6127 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6128 gcc_assert (idx >= 0);
6129 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6130 /* Make sure it is accessible. */
6131 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6135 /* Call build_cleanup before we enter the anonymous function so
6136 that any access checks will be done relative to the current
6137 scope, rather than the scope of the anonymous function. */
6138 build_cleanup (decl);
6140 /* Now start the function. */
6141 cleanup = start_cleanup_fn ();
6143 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6144 to the original function, rather than the anonymous one. That
6145 will make the back end think that nested functions are in use,
6146 which causes confusion. */
6147 push_deferring_access_checks (dk_no_check);
6148 fcall = build_cleanup (decl);
6149 pop_deferring_access_checks ();
6151 /* Create the body of the anonymous function. */
6152 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6153 finish_expr_stmt (fcall);
6154 finish_compound_stmt (compound_stmt);
6158 /* Call atexit with the cleanup function. */
6159 mark_used (cleanup);
6160 cleanup = build_address (cleanup);
6161 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6167 /* We must convert CLEANUP to the type that "__cxa_atexit"
6169 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6170 /* "__cxa_atexit" will pass the address of DECL to the
6171 cleanup function. */
6173 addr = build_address (decl);
6174 /* The declared type of the parameter to "__cxa_atexit" is
6175 "void *". For plain "T*", we could just let the
6176 machinery in cp_build_function_call convert it -- but if the
6177 type is "cv-qualified T *", then we need to convert it
6178 before passing it in, to avoid spurious errors. */
6179 addr = build_nop (ptr_type_node, addr);
6182 /* Since the cleanup functions we build ignore the address
6183 they're given, there's no reason to pass the actual address
6184 in, and, in general, it's cheaper to pass NULL than any
6186 addr = null_pointer_node;
6187 args = tree_cons (NULL_TREE,
6188 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6189 tf_warning_or_error),
6191 if (targetm.cxx.use_aeabi_atexit ())
6193 args = tree_cons (NULL_TREE, cleanup, args);
6194 args = tree_cons (NULL_TREE, addr, args);
6198 args = tree_cons (NULL_TREE, addr, args);
6199 args = tree_cons (NULL_TREE, cleanup, args);
6203 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6204 return cp_build_function_call (get_atexit_node (), args,
6205 tf_warning_or_error);
6208 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6209 is its initializer. Generate code to handle the construction
6210 and destruction of DECL. */
6213 expand_static_init (tree decl, tree init)
6215 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6216 gcc_assert (TREE_STATIC (decl));
6218 /* Some variables require no initialization. */
6220 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6221 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6224 if (DECL_FUNCTION_SCOPE_P (decl))
6226 /* Emit code to perform this initialization but once. */
6227 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6228 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6229 tree guard, guard_addr;
6230 tree acquire_fn, release_fn, abort_fn;
6233 /* Emit code to perform this initialization but once. This code
6236 static <type> guard;
6237 if (!guard.first_byte) {
6238 if (__cxa_guard_acquire (&guard)) {
6241 // Do initialization.
6242 flag = true; __cxa_guard_release (&guard);
6243 // Register variable for destruction at end of program.
6245 if (!flag) __cxa_guard_abort (&guard);
6249 Note that the `flag' variable is only set to 1 *after* the
6250 initialization is complete. This ensures that an exception,
6251 thrown during the construction, will cause the variable to
6252 reinitialized when we pass through this code again, as per:
6256 If the initialization exits by throwing an exception, the
6257 initialization is not complete, so it will be tried again
6258 the next time control enters the declaration.
6260 This process should be thread-safe, too; multiple threads
6261 should not be able to initialize the variable more than
6264 /* Create the guard variable. */
6265 guard = get_guard (decl);
6267 /* This optimization isn't safe on targets with relaxed memory
6268 consistency. On such targets we force synchronization in
6269 __cxa_guard_acquire. */
6270 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6272 /* Begin the conditional initialization. */
6273 if_stmt = begin_if_stmt ();
6274 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6275 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6278 if (flag_threadsafe_statics)
6280 guard_addr = build_address (guard);
6282 acquire_fn = get_identifier ("__cxa_guard_acquire");
6283 release_fn = get_identifier ("__cxa_guard_release");
6284 abort_fn = get_identifier ("__cxa_guard_abort");
6285 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6287 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6289 tree vfntype = build_function_type (void_type_node, argtypes);
6290 acquire_fn = push_library_fn
6291 (acquire_fn, build_function_type (integer_type_node, argtypes),
6293 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6294 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6298 release_fn = identifier_global_value (release_fn);
6299 abort_fn = identifier_global_value (abort_fn);
6302 inner_if_stmt = begin_if_stmt ();
6303 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6306 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6307 begin = get_target_expr (boolean_false_node);
6308 flag = TARGET_EXPR_SLOT (begin);
6310 TARGET_EXPR_CLEANUP (begin)
6311 = build3 (COND_EXPR, void_type_node, flag,
6313 build_call_n (abort_fn, 1, guard_addr));
6314 CLEANUP_EH_ONLY (begin) = 1;
6316 /* Do the initialization itself. */
6317 init = add_stmt_to_compound (begin, init);
6318 init = add_stmt_to_compound
6319 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6320 init = add_stmt_to_compound
6321 (init, build_call_n (release_fn, 1, guard_addr));
6324 init = add_stmt_to_compound (init, set_guard (guard));
6326 /* Use atexit to register a function for destroying this static
6328 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6330 finish_expr_stmt (init);
6332 if (flag_threadsafe_statics)
6334 finish_compound_stmt (inner_then_clause);
6335 finish_then_clause (inner_if_stmt);
6336 finish_if_stmt (inner_if_stmt);
6339 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6341 finish_compound_stmt (then_clause);
6342 finish_then_clause (if_stmt);
6343 finish_if_stmt (if_stmt);
6347 static_aggregates = tree_cons (init, decl, static_aggregates);
6351 /* Make TYPE a complete type based on INITIAL_VALUE.
6352 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6353 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6354 3 if the initializer list is empty (in pedantic mode). */
6357 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6360 tree type, elt_type;
6364 unsigned HOST_WIDE_INT i;
6367 /* An array of character type can be initialized from a
6368 brace-enclosed string constant.
6370 FIXME: this code is duplicated from reshape_init. Probably
6371 we should just call reshape_init here? */
6372 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6373 && TREE_CODE (initial_value) == CONSTRUCTOR
6374 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6376 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6377 tree value = VEC_index (constructor_elt, v, 0)->value;
6379 if (TREE_CODE (value) == STRING_CST
6380 && VEC_length (constructor_elt, v) == 1)
6381 initial_value = value;
6384 /* If any of the elements are parameter packs, we can't actually
6385 complete this type now because the array size is dependent. */
6386 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6388 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6391 if (PACK_EXPANSION_P (value))
6397 failure = complete_array_type (ptype, initial_value, do_default);
6399 /* We can create the array before the element type is complete, which
6400 means that we didn't have these two bits set in the original type
6401 either. In completing the type, we are expected to propagate these
6402 bits. See also complete_type which does the same thing for arrays
6405 if (TYPE_DOMAIN (type))
6407 elt_type = TREE_TYPE (type);
6408 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6409 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6410 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6416 /* Return zero if something is declared to be a member of type
6417 CTYPE when in the context of CUR_TYPE. STRING is the error
6418 message to print in that case. Otherwise, quietly return 1. */
6421 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6423 if (ctype && ctype != cur_type)
6425 if (flags == DTOR_FLAG)
6426 error ("destructor for alien class %qT cannot be a member", ctype);
6428 error ("constructor for alien class %qT cannot be a member", ctype);
6434 /* Subroutine of `grokdeclarator'. */
6436 /* Generate errors possibly applicable for a given set of specifiers.
6437 This is for ARM $7.1.2. */
6440 bad_specifiers (tree object,
6449 error ("%qD declared as a %<virtual%> %s", object, type);
6451 error ("%qD declared as an %<inline%> %s", object, type);
6453 error ("%<const%> and %<volatile%> function specifiers on "
6454 "%qD invalid in %s declaration",
6457 error ("%q+D declared as a friend", object);
6459 && (TREE_CODE (object) == TYPE_DECL
6460 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6461 && !TYPE_REFFN_P (TREE_TYPE (object))
6462 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6463 error ("%q+D declared with an exception specification", object);
6466 /* DECL is a member function or static data member and is presently
6467 being defined. Check that the definition is taking place in a
6471 check_class_member_definition_namespace (tree decl)
6473 /* These checks only apply to member functions and static data
6475 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6476 || TREE_CODE (decl) == VAR_DECL);
6477 /* We check for problems with specializations in pt.c in
6478 check_specialization_namespace, where we can issue better
6480 if (processing_specialization)
6482 /* There are no restrictions on the placement of
6483 explicit instantiations. */
6484 if (processing_explicit_instantiation)
6488 A member function definition that appears outside of the
6489 class definition shall appear in a namespace scope enclosing
6490 the class definition.
6494 The definition for a static data member shall appear in a
6495 namespace scope enclosing the member's class definition. */
6496 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6497 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6498 decl, DECL_CONTEXT (decl));
6501 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6502 METHOD_TYPE for a non-static member function; QUALS are the
6503 cv-qualifiers that apply to the function. */
6506 build_this_parm (tree type, cp_cv_quals quals)
6511 cp_cv_quals this_quals;
6513 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6514 /* The `this' parameter is implicitly `const'; it cannot be
6516 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6517 qual_type = cp_build_qualified_type (this_type, this_quals);
6518 parm = build_artificial_parm (this_identifier, qual_type);
6519 cp_apply_type_quals_to_decl (this_quals, parm);
6523 /* CTYPE is class type, or null if non-class.
6524 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6526 DECLARATOR is the function's name.
6527 PARMS is a chain of PARM_DECLs for the function.
6528 VIRTUALP is truthvalue of whether the function is virtual or not.
6529 FLAGS are to be passed through to `grokclassfn'.
6530 QUALS are qualifiers indicating whether the function is `const'
6532 RAISES is a list of exceptions that this function can raise.
6533 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6534 not look, and -1 if we should not call `grokclassfn' at all.
6536 SFK is the kind of special function (if any) for the new function.
6538 Returns `NULL_TREE' if something goes wrong, after issuing
6539 applicable error messages. */
6542 grokfndecl (tree ctype,
6546 tree orig_declarator,
6548 enum overload_flags flags,
6555 special_function_kind sfk,
6560 location_t location)
6563 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6567 type = build_exception_variant (type, raises);
6569 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6571 /* If we have an explicit location, use it, otherwise use whatever
6572 build_lang_decl used (probably input_location). */
6573 if (location != UNKNOWN_LOCATION)
6574 DECL_SOURCE_LOCATION (decl) = location;
6576 if (TREE_CODE (type) == METHOD_TYPE)
6579 parm = build_this_parm (type, quals);
6580 TREE_CHAIN (parm) = parms;
6583 DECL_ARGUMENTS (decl) = parms;
6584 for (t = parms; t; t = TREE_CHAIN (t))
6585 DECL_CONTEXT (t) = decl;
6586 /* Propagate volatile out from type to decl. */
6587 if (TYPE_VOLATILE (type))
6588 TREE_THIS_VOLATILE (decl) = 1;
6590 /* Setup decl according to sfk. */
6593 case sfk_constructor:
6594 case sfk_copy_constructor:
6595 DECL_CONSTRUCTOR_P (decl) = 1;
6597 case sfk_destructor:
6598 DECL_DESTRUCTOR_P (decl) = 1;
6604 /* If pointers to member functions use the least significant bit to
6605 indicate whether a function is virtual, ensure a pointer
6606 to this function will have that bit clear. */
6607 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6608 && TREE_CODE (type) == METHOD_TYPE
6609 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6610 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6613 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6617 ("defining explicit specialization %qD in friend declaration",
6621 tree fns = TREE_OPERAND (orig_declarator, 0);
6622 tree args = TREE_OPERAND (orig_declarator, 1);
6624 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6626 /* Something like `template <class T> friend void f<T>()'. */
6627 error ("invalid use of template-id %qD in declaration "
6628 "of primary template",
6634 /* A friend declaration of the form friend void f<>(). Record
6635 the information in the TEMPLATE_ID_EXPR. */
6636 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6638 if (TREE_CODE (fns) == COMPONENT_REF)
6640 /* Due to bison parser ickiness, we will have already looked
6641 up an operator_name or PFUNCNAME within the current class
6642 (see template_id in parse.y). If the current class contains
6643 such a name, we'll get a COMPONENT_REF here. Undo that. */
6645 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6646 == current_class_type);
6647 fns = TREE_OPERAND (fns, 1);
6649 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6650 || TREE_CODE (fns) == OVERLOAD);
6651 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6653 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6654 if (TREE_PURPOSE (t)
6655 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6657 error ("default arguments are not allowed in declaration "
6658 "of friend template specialization %qD",
6665 error ("%<inline%> is not allowed in declaration of friend "
6666 "template specialization %qD",
6673 /* If this decl has namespace scope, set that up. */
6675 set_decl_namespace (decl, in_namespace, friendp);
6677 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6679 /* `main' and builtins have implicit 'C' linkage. */
6680 if ((MAIN_NAME_P (declarator)
6681 || (IDENTIFIER_LENGTH (declarator) > 10
6682 && IDENTIFIER_POINTER (declarator)[0] == '_'
6683 && IDENTIFIER_POINTER (declarator)[1] == '_'
6684 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6685 && current_lang_name == lang_name_cplusplus
6686 && ctype == NULL_TREE
6687 /* NULL_TREE means global namespace. */
6688 && DECL_CONTEXT (decl) == NULL_TREE)
6689 SET_DECL_LANGUAGE (decl, lang_c);
6691 /* Should probably propagate const out from type to decl I bet (mrs). */
6694 DECL_STATIC_FUNCTION_P (decl) = 1;
6695 DECL_CONTEXT (decl) = ctype;
6700 DECL_CONTEXT (decl) = ctype;
6702 check_class_member_definition_namespace (decl);
6705 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6707 if (processing_template_decl)
6708 error ("cannot declare %<::main%> to be a template");
6710 error ("cannot declare %<::main%> to be inline");
6712 error ("cannot declare %<::main%> to be static");
6717 /* Members of anonymous types and local classes have no linkage; make
6718 them internal. If a typedef is made later, this will be changed. */
6719 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6720 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6725 /* [basic.link]: A name with no linkage (notably, the name of a class
6726 or enumeration declared in a local scope) shall not be used to
6727 declare an entity with linkage.
6729 Only check this for public decls for now. See core 319, 389. */
6730 t = no_linkage_check (TREE_TYPE (decl),
6731 /*relaxed_p=*/false);
6734 if (TYPE_ANONYMOUS_P (t))
6736 if (DECL_EXTERN_C_P (decl))
6737 /* Allow this; it's pretty common in C. */;
6740 permerror (input_location, "non-local function %q#D uses anonymous type",
6742 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6743 permerror (input_location, "%q+#D does not refer to the unqualified "
6744 "type, so it is not used for linkage",
6749 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6753 TREE_PUBLIC (decl) = publicp;
6756 DECL_INTERFACE_KNOWN (decl) = 1;
6757 DECL_NOT_REALLY_EXTERN (decl) = 1;
6760 /* If the declaration was declared inline, mark it as such. */
6762 DECL_DECLARED_INLINE_P (decl) = 1;
6764 DECL_EXTERNAL (decl) = 1;
6765 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6768 ? G_("static member function %qD cannot have cv-qualifier")
6769 : G_("non-member function %qD cannot have cv-qualifier"),
6771 quals = TYPE_UNQUALIFIED;
6774 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6775 && !grok_op_properties (decl, /*complain=*/true))
6778 if (ctype && decl_function_context (decl))
6779 DECL_NO_STATIC_CHAIN (decl) = 1;
6782 /* Make the init_value nonzero so pushdecl knows this is not
6783 tentative. error_mark_node is replaced later with the BLOCK. */
6784 DECL_INITIAL (decl) = error_mark_node;
6786 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6787 TREE_NOTHROW (decl) = 1;
6789 /* Caller will do the rest of this. */
6793 if (ctype != NULL_TREE)
6794 grokclassfn (ctype, decl, flags);
6796 decl = check_explicit_specialization (orig_declarator, decl,
6799 4 * (friendp != 0));
6800 if (decl == error_mark_node)
6805 cplus_decl_attributes (&decl, *attrlist, 0);
6806 *attrlist = NULL_TREE;
6809 /* Check main's type after attributes have been applied. */
6810 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6812 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6815 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6817 error ("%<::main%> must return %<int%>");
6818 newtype = build_function_type (integer_type_node, oldtypeargs);
6819 TREE_TYPE (decl) = newtype;
6822 check_main_parameter_types (decl);
6825 if (ctype != NULL_TREE
6826 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6829 tree old_decl = check_classfn (ctype, decl,
6830 (processing_template_decl
6831 > template_class_depth (ctype))
6832 ? current_template_parms
6835 if (old_decl == error_mark_node)
6843 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6844 /* Because grokfndecl is always supposed to return a
6845 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6846 here. We depend on our callers to figure out that its
6847 really a template that's being returned. */
6848 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6850 if (DECL_STATIC_FUNCTION_P (old_decl)
6851 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6852 /* Remove the `this' parm added by grokclassfn.
6853 XXX Isn't this done in start_function, too? */
6854 revert_static_member_fn (decl);
6855 if (DECL_ARTIFICIAL (old_decl))
6857 error ("definition of implicitly-declared %qD", old_decl);
6861 /* Since we've smashed OLD_DECL to its
6862 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6863 if (TREE_CODE (decl) == TEMPLATE_DECL)
6864 decl = DECL_TEMPLATE_RESULT (decl);
6866 /* Attempt to merge the declarations. This can fail, in
6867 the case of some invalid specialization declarations. */
6868 pushed_scope = push_scope (ctype);
6869 ok = duplicate_decls (decl, old_decl, friendp);
6871 pop_scope (pushed_scope);
6874 error ("no %q#D member function declared in class %qT",
6882 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6885 if (ctype == NULL_TREE || check)
6889 DECL_VIRTUAL_P (decl) = 1;
6894 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6895 the linkage that DECL will receive in the object file. */
6898 set_linkage_for_static_data_member (tree decl)
6900 /* A static data member always has static storage duration and
6901 external linkage. Note that static data members are forbidden in
6902 local classes -- the only situation in which a class has
6903 non-external linkage. */
6904 TREE_PUBLIC (decl) = 1;
6905 TREE_STATIC (decl) = 1;
6906 /* For non-template classes, static data members are always put
6907 out in exactly those files where they are defined, just as
6908 with ordinary namespace-scope variables. */
6909 if (!processing_template_decl)
6910 DECL_INTERFACE_KNOWN (decl) = 1;
6913 /* Create a VAR_DECL named NAME with the indicated TYPE.
6915 If SCOPE is non-NULL, it is the class type or namespace containing
6916 the variable. If SCOPE is NULL, the variable should is created in
6917 the innermost enclosings scope. */
6920 grokvardecl (tree type,
6922 const cp_decl_specifier_seq *declspecs,
6928 tree explicit_scope;
6930 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6932 /* Compute the scope in which to place the variable, but remember
6933 whether or not that scope was explicitly specified by the user. */
6934 explicit_scope = scope;
6937 /* An explicit "extern" specifier indicates a namespace-scope
6939 if (declspecs->storage_class == sc_extern)
6940 scope = current_namespace;
6941 else if (!at_function_scope_p ())
6942 scope = current_scope ();
6946 && (/* If the variable is a namespace-scope variable declared in a
6947 template, we need DECL_LANG_SPECIFIC. */
6948 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6949 /* Similarly for namespace-scope variables with language linkage
6951 || (TREE_CODE (scope) == NAMESPACE_DECL
6952 && current_lang_name != lang_name_cplusplus)
6953 /* Similarly for static data members. */
6955 decl = build_lang_decl (VAR_DECL, name, type);
6957 decl = build_decl (input_location, VAR_DECL, name, type);
6959 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6960 set_decl_namespace (decl, explicit_scope, 0);
6962 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6964 if (declspecs->storage_class == sc_extern)
6966 DECL_THIS_EXTERN (decl) = 1;
6967 DECL_EXTERNAL (decl) = !initialized;
6970 if (DECL_CLASS_SCOPE_P (decl))
6972 set_linkage_for_static_data_member (decl);
6973 /* This function is only called with out-of-class definitions. */
6974 DECL_EXTERNAL (decl) = 0;
6975 check_class_member_definition_namespace (decl);
6977 /* At top level, either `static' or no s.c. makes a definition
6978 (perhaps tentative), and absence of `static' makes it public. */
6979 else if (toplevel_bindings_p ())
6981 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6982 && (DECL_THIS_EXTERN (decl) || ! constp));
6983 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6985 /* Not at top level, only `static' makes a static definition. */
6988 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6989 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6992 if (declspecs->specs[(int)ds_thread])
6993 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6995 if (TREE_PUBLIC (decl))
6997 /* [basic.link]: A name with no linkage (notably, the name of a class
6998 or enumeration declared in a local scope) shall not be used to
6999 declare an entity with linkage.
7001 Only check this for public decls for now. */
7002 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7005 if (TYPE_ANONYMOUS_P (t))
7007 if (DECL_EXTERN_C_P (decl))
7008 /* Allow this; it's pretty common in C. */
7012 /* DRs 132, 319 and 389 seem to indicate types with
7013 no linkage can only be used to declare extern "C"
7014 entities. Since it's not always an error in the
7015 ISO C++ 90 Standard, we only issue a warning. */
7016 warning (0, "non-local variable %q#D uses anonymous type",
7018 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7019 warning (0, "%q+#D does not refer to the unqualified "
7020 "type, so it is not used for linkage",
7025 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7029 DECL_INTERFACE_KNOWN (decl) = 1;
7034 /* Create and return a canonical pointer to member function type, for
7035 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7038 build_ptrmemfunc_type (tree type)
7042 tree unqualified_variant = NULL_TREE;
7044 if (type == error_mark_node)
7047 /* If a canonical type already exists for this type, use it. We use
7048 this method instead of type_hash_canon, because it only does a
7049 simple equality check on the list of field members. */
7051 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7054 /* Make sure that we always have the unqualified pointer-to-member
7056 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7058 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7060 t = make_class_type (RECORD_TYPE);
7061 xref_basetypes (t, NULL_TREE);
7063 /* Let the front end know this is a pointer to member function... */
7064 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7065 /* ... and not really a class type. */
7066 SET_CLASS_TYPE_P (t, 0);
7068 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7071 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7073 TREE_CHAIN (field) = fields;
7076 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7078 /* Zap out the name so that the back end will give us the debugging
7079 information for this anonymous RECORD_TYPE. */
7080 TYPE_NAME (t) = NULL_TREE;
7082 /* If this is not the unqualified form of this pointer-to-member
7083 type, set the TYPE_MAIN_VARIANT for this type to be the
7084 unqualified type. Since they are actually RECORD_TYPEs that are
7085 not variants of each other, we must do this manually. */
7086 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7088 t = build_qualified_type (t, cp_type_quals (type));
7089 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7090 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7091 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7092 TREE_TYPE (TYPE_BINFO (t)) = t;
7095 /* Cache this pointer-to-member type so that we can find it again
7097 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7099 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7100 SET_TYPE_STRUCTURAL_EQUALITY (t);
7101 else if (TYPE_CANONICAL (type) != type)
7102 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7107 /* Create and return a pointer to data member type. */
7110 build_ptrmem_type (tree class_type, tree member_type)
7112 if (TREE_CODE (member_type) == METHOD_TYPE)
7116 arg_types = TYPE_ARG_TYPES (member_type);
7117 class_type = (cp_build_qualified_type
7119 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7121 = build_method_type_directly (class_type,
7122 TREE_TYPE (member_type),
7123 TREE_CHAIN (arg_types));
7124 return build_ptrmemfunc_type (build_pointer_type (member_type));
7128 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7129 return build_offset_type (class_type, member_type);
7133 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7134 Check to see that the definition is valid. Issue appropriate error
7135 messages. Return 1 if the definition is particularly bad, or 0
7139 check_static_variable_definition (tree decl, tree type)
7141 /* Motion 10 at San Diego: If a static const integral data member is
7142 initialized with an integral constant expression, the initializer
7143 may appear either in the declaration (within the class), or in
7144 the definition, but not both. If it appears in the class, the
7145 member is a member constant. The file-scope definition is always
7147 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7149 error ("invalid in-class initialization of static data member "
7150 "of non-integral type %qT",
7152 /* If we just return the declaration, crashes will sometimes
7153 occur. We therefore return void_type_node, as if this were a
7154 friend declaration, to cause callers to completely ignore
7155 this declaration. */
7158 else if (!CP_TYPE_CONST_P (type))
7159 error ("ISO C++ forbids in-class initialization of non-const "
7160 "static member %qD",
7162 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7163 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7164 "%qD of non-integral type %qT", decl, type);
7169 /* Given the SIZE (i.e., number of elements) in an array, compute an
7170 appropriate index type for the array. If non-NULL, NAME is the
7171 name of the thing being declared. */
7174 compute_array_index_type (tree name, tree size)
7178 tree abi_1_itype = NULL_TREE;
7180 if (error_operand_p (size))
7181 return error_mark_node;
7183 type = TREE_TYPE (size);
7184 /* The array bound must be an integer type. */
7185 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7188 error ("size of array %qD has non-integral type %qT", name, type);
7190 error ("size of array has non-integral type %qT", type);
7191 size = integer_one_node;
7192 type = TREE_TYPE (size);
7195 /* We can only call value_dependent_expression_p on integral constant
7196 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7197 set if this isn't one. */
7198 if (processing_template_decl
7199 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7201 /* We cannot do any checking for a SIZE that isn't known to be
7202 constant. Just build the index type and mark that it requires
7203 structural equality checks. */
7204 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7205 size, integer_one_node));
7206 if (!TREE_SIDE_EFFECTS (size))
7208 TYPE_DEPENDENT_P (itype) = 1;
7209 TYPE_DEPENDENT_P_VALID (itype) = 1;
7211 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7215 if (!abi_version_at_least (2) && processing_template_decl)
7216 /* For abi-1, we handled all instances in templates the same way,
7217 even when they were non-dependent. This affects the manglings
7218 produced. So, we do the normal checking for non-dependent
7219 sizes, but at the end we'll return the same type that abi-1
7220 would have, but with TYPE_CANONICAL set to the "right"
7221 value that the current ABI would provide. */
7222 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7223 size, integer_one_node));
7225 /* The size might be the result of a cast. */
7226 STRIP_TYPE_NOPS (size);
7228 /* It might be a const variable or enumeration constant. */
7229 size = integral_constant_value (size);
7231 /* Normally, the array-bound will be a constant. */
7232 if (TREE_CODE (size) == INTEGER_CST)
7234 /* Check to see if the array bound overflowed. Make that an
7235 error, no matter how generous we're being. */
7236 constant_expression_error (size);
7238 /* An array must have a positive number of elements. */
7239 if (INT_CST_LT (size, integer_zero_node))
7242 error ("size of array %qD is negative", name);
7244 error ("size of array is negative");
7245 size = integer_one_node;
7247 /* As an extension we allow zero-sized arrays. We always allow
7248 them in system headers because glibc uses them. */
7249 else if (integer_zerop (size) && !in_system_header)
7252 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7254 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7257 else if (TREE_CONSTANT (size))
7259 /* `(int) &fn' is not a valid array bound. */
7261 error ("size of array %qD is not an integral constant-expression",
7264 error ("size of array is not an integral constant-expression");
7265 size = integer_one_node;
7267 else if (pedantic && warn_vla != 0)
7270 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7272 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7274 else if (warn_vla > 0)
7278 "variable length array %qD is used", name);
7281 "variable length array is used");
7284 if (processing_template_decl && !TREE_CONSTANT (size))
7285 /* A variable sized array. */
7286 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7289 HOST_WIDE_INT saved_processing_template_decl;
7291 /* Compute the index of the largest element in the array. It is
7292 one less than the number of elements in the array. We save
7293 and restore PROCESSING_TEMPLATE_DECL so that computations in
7294 cp_build_binary_op will be appropriately folded. */
7295 saved_processing_template_decl = processing_template_decl;
7296 processing_template_decl = 0;
7297 itype = cp_build_binary_op (input_location,
7299 cp_convert (ssizetype, size),
7300 cp_convert (ssizetype, integer_one_node),
7301 tf_warning_or_error);
7302 itype = fold (itype);
7303 processing_template_decl = saved_processing_template_decl;
7305 if (!TREE_CONSTANT (itype))
7306 /* A variable sized array. */
7307 itype = variable_size (itype);
7308 /* Make sure that there was no overflow when creating to a signed
7309 index type. (For example, on a 32-bit machine, an array with
7310 size 2^32 - 1 is too big.) */
7311 else if (TREE_CODE (itype) == INTEGER_CST
7312 && TREE_OVERFLOW (itype))
7314 error ("overflow in array dimension");
7315 TREE_OVERFLOW (itype) = 0;
7319 /* Create and return the appropriate index type. */
7322 tree t = build_index_type (itype);
7323 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7327 return build_index_type (itype);
7330 /* Returns the scope (if any) in which the entity declared by
7331 DECLARATOR will be located. If the entity was declared with an
7332 unqualified name, NULL_TREE is returned. */
7335 get_scope_of_declarator (const cp_declarator *declarator)
7337 while (declarator && declarator->kind != cdk_id)
7338 declarator = declarator->declarator;
7340 /* If the declarator-id is a SCOPE_REF, the scope in which the
7341 declaration occurs is the first operand. */
7343 && declarator->u.id.qualifying_scope)
7344 return declarator->u.id.qualifying_scope;
7346 /* Otherwise, the declarator is not a qualified name; the entity will
7347 be declared in the current scope. */
7351 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7352 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7356 create_array_type_for_decl (tree name, tree type, tree size)
7358 tree itype = NULL_TREE;
7359 const char* error_msg;
7361 /* If things have already gone awry, bail now. */
7362 if (type == error_mark_node || size == error_mark_node)
7363 return error_mark_node;
7365 /* Assume that everything will go OK. */
7368 /* There are some types which cannot be array elements. */
7369 switch (TREE_CODE (type))
7372 error_msg = "array of void";
7376 error_msg = "array of functions";
7379 case REFERENCE_TYPE:
7380 error_msg = "array of references";
7384 error_msg = "array of function members";
7391 /* If something went wrong, issue an error-message and return. */
7395 error ("declaration of %qD as %s", name, error_msg);
7397 error ("creating %s", error_msg);
7399 return error_mark_node;
7404 The constant expressions that specify the bounds of the arrays
7405 can be omitted only for the first member of the sequence. */
7406 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7409 error ("declaration of %qD as multidimensional array must "
7410 "have bounds for all dimensions except the first",
7413 error ("multidimensional array must have bounds for all "
7414 "dimensions except the first");
7416 return error_mark_node;
7419 /* Figure out the index type for the array. */
7421 itype = compute_array_index_type (name, size);
7424 T is called the array element type; this type shall not be [...] an
7425 abstract class type. */
7426 abstract_virtuals_error (name, type);
7428 return build_cplus_array_type (type, itype);
7431 /* Check that it's OK to declare a function with the indicated TYPE.
7432 SFK indicates the kind of special function (if any) that this
7433 function is. OPTYPE is the type given in a conversion operator
7434 declaration, or the class type for a constructor/destructor.
7435 Returns the actual return type of the function; that
7436 may be different than TYPE if an error occurs, or for certain
7437 special functions. */
7440 check_special_function_return_type (special_function_kind sfk,
7446 case sfk_constructor:
7448 error ("return type specification for constructor invalid");
7450 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7451 type = build_pointer_type (optype);
7453 type = void_type_node;
7456 case sfk_destructor:
7458 error ("return type specification for destructor invalid");
7459 /* We can't use the proper return type here because we run into
7460 problems with ambiguous bases and covariant returns.
7461 Java classes are left unchanged because (void *) isn't a valid
7462 Java type, and we don't want to change the Java ABI. */
7463 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7464 type = build_pointer_type (void_type_node);
7466 type = void_type_node;
7469 case sfk_conversion:
7471 error ("return type specified for %<operator %T%>", optype);
7482 /* A variable or data member (whose unqualified name is IDENTIFIER)
7483 has been declared with the indicated TYPE. If the TYPE is not
7484 acceptable, issue an error message and return a type to use for
7485 error-recovery purposes. */
7488 check_var_type (tree identifier, tree type)
7490 if (VOID_TYPE_P (type))
7493 error ("unnamed variable or field declared void");
7494 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7496 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7497 error ("variable or field %qE declared void", identifier);
7500 error ("variable or field declared void");
7501 type = error_mark_node;
7507 /* Given declspecs and a declarator (abstract or otherwise), determine
7508 the name and type of the object declared and construct a DECL node
7511 DECLSPECS points to the representation of declaration-specifier
7512 sequence that precedes declarator.
7514 DECL_CONTEXT says which syntactic context this declaration is in:
7515 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7516 FUNCDEF for a function definition. Like NORMAL but a few different
7517 error messages in each case. Return value may be zero meaning
7518 this definition is too screwy to try to parse.
7519 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7520 handle member functions (which have FIELD context).
7521 Return value may be zero meaning this definition is too screwy to
7523 PARM for a parameter declaration (either within a function prototype
7524 or before a function body). Make a PARM_DECL, or return void_type_node.
7525 CATCHPARM for a parameter declaration before a catch clause.
7526 TYPENAME if for a typename (in a cast or sizeof).
7527 Don't make a DECL node; just return the ..._TYPE node.
7528 FIELD for a struct or union field; make a FIELD_DECL.
7529 BITFIELD for a field with specified width.
7530 INITIALIZED is as for start_decl.
7532 ATTRLIST is a pointer to the list of attributes, which may be NULL
7533 if there are none; *ATTRLIST may be modified if attributes from inside
7534 the declarator should be applied to the declaration.
7536 When this function is called, scoping variables (such as
7537 CURRENT_CLASS_TYPE) should reflect the scope in which the
7538 declaration occurs, not the scope in which the new declaration will
7539 be placed. For example, on:
7543 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7546 Returns a DECL (if a declarator is present), a TYPE (if there is no
7547 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7551 grokdeclarator (const cp_declarator *declarator,
7552 const cp_decl_specifier_seq *declspecs,
7553 enum decl_context decl_context,
7557 tree type = NULL_TREE;
7559 int virtualp, explicitp, friendp, inlinep, staticp;
7560 int explicit_int = 0;
7561 int explicit_char = 0;
7562 int defaulted_int = 0;
7563 tree dependent_name = NULL_TREE;
7565 tree typedef_decl = NULL_TREE;
7566 const char *name = NULL;
7567 tree typedef_type = NULL_TREE;
7568 /* True if this declarator is a function definition. */
7569 bool funcdef_flag = false;
7570 cp_declarator_kind innermost_code = cdk_error;
7573 /* See the code below that used this. */
7574 tree decl_attr = NULL_TREE;
7577 /* Keep track of what sort of function is being processed
7578 so that we can warn about default return values, or explicit
7579 return values which do not match prescribed defaults. */
7580 special_function_kind sfk = sfk_none;
7582 tree dname = NULL_TREE;
7583 tree ctor_return_type = NULL_TREE;
7584 enum overload_flags flags = NO_SPECIAL;
7585 /* cv-qualifiers that apply to the declarator, for a declaration of
7586 a member function. */
7587 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7588 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7590 tree raises = NULL_TREE;
7591 int template_count = 0;
7592 tree returned_attrs = NULL_TREE;
7593 tree parms = NULL_TREE;
7594 const cp_declarator *id_declarator;
7595 /* The unqualified name of the declarator; either an
7596 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7597 tree unqualified_id;
7598 /* The class type, if any, in which this entity is located,
7599 or NULL_TREE if none. Note that this value may be different from
7600 the current class type; for example if an attempt is made to declare
7601 "A::f" inside "B", this value will be "A". */
7602 tree ctype = current_class_type;
7603 /* The NAMESPACE_DECL for the namespace in which this entity is
7604 located. If an unqualified name is used to declare the entity,
7605 this value will be NULL_TREE, even if the entity is located at
7607 tree in_namespace = NULL_TREE;
7608 cp_storage_class storage_class;
7609 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7610 bool type_was_error_mark_node = false;
7611 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7612 bool set_no_warning = false;
7613 bool template_type_arg = false;
7616 signed_p = declspecs->specs[(int)ds_signed];
7617 unsigned_p = declspecs->specs[(int)ds_unsigned];
7618 short_p = declspecs->specs[(int)ds_short];
7619 long_p = declspecs->specs[(int)ds_long];
7620 longlong = declspecs->specs[(int)ds_long] >= 2;
7621 thread_p = declspecs->specs[(int)ds_thread];
7623 if (decl_context == FUNCDEF)
7624 funcdef_flag = true, decl_context = NORMAL;
7625 else if (decl_context == MEMFUNCDEF)
7626 funcdef_flag = true, decl_context = FIELD;
7627 else if (decl_context == BITFIELD)
7628 bitfield = 1, decl_context = FIELD;
7629 else if (decl_context == TEMPLATE_TYPE_ARG)
7630 template_type_arg = true, decl_context = TYPENAME;
7632 if (initialized > 1)
7633 funcdef_flag = true;
7635 /* Look inside a declarator for the name being declared
7636 and get it as a string, for an error message. */
7637 for (id_declarator = declarator;
7639 id_declarator = id_declarator->declarator)
7641 if (id_declarator->kind != cdk_id)
7642 innermost_code = id_declarator->kind;
7644 switch (id_declarator->kind)
7647 if (id_declarator->declarator
7648 && id_declarator->declarator->kind == cdk_id)
7650 sfk = id_declarator->declarator->u.id.sfk;
7651 if (sfk == sfk_destructor)
7658 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7659 tree decl = id_declarator->u.id.unqualified_name;
7662 if (qualifying_scope)
7664 if (at_function_scope_p ())
7668 A declarator-id shall not be qualified except
7671 None of the cases are permitted in block
7673 if (qualifying_scope == global_namespace)
7674 error ("invalid use of qualified-name %<::%D%>",
7676 else if (TYPE_P (qualifying_scope))
7677 error ("invalid use of qualified-name %<%T::%D%>",
7678 qualifying_scope, decl);
7680 error ("invalid use of qualified-name %<%D::%D%>",
7681 qualifying_scope, decl);
7682 return error_mark_node;
7684 else if (TYPE_P (qualifying_scope))
7686 ctype = qualifying_scope;
7687 if (innermost_code != cdk_function
7688 && current_class_type
7689 && !UNIQUELY_DERIVED_FROM_P (ctype,
7690 current_class_type))
7692 error ("type %qT is not derived from type %qT",
7693 ctype, current_class_type);
7694 return error_mark_node;
7697 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7698 in_namespace = qualifying_scope;
7700 switch (TREE_CODE (decl))
7706 if (innermost_code != cdk_function)
7708 error ("declaration of %qD as non-function", decl);
7709 return error_mark_node;
7711 else if (!qualifying_scope
7712 && !(current_class_type && at_class_scope_p ()))
7714 error ("declaration of %qD as non-member", decl);
7715 return error_mark_node;
7718 type = TREE_OPERAND (decl, 0);
7720 type = constructor_name (type);
7721 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7726 case TEMPLATE_ID_EXPR:
7728 tree fns = TREE_OPERAND (decl, 0);
7731 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7733 gcc_assert (is_overloaded_fn (dname));
7734 dname = DECL_NAME (get_first_fn (dname));
7739 case IDENTIFIER_NODE:
7740 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7743 if (C_IS_RESERVED_WORD (dname))
7745 error ("declarator-id missing; using reserved word %qD",
7747 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7749 else if (!IDENTIFIER_TYPENAME_P (dname))
7750 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7753 gcc_assert (flags == NO_SPECIAL);
7754 flags = TYPENAME_FLAG;
7755 ctor_return_type = TREE_TYPE (dname);
7756 sfk = sfk_conversion;
7757 if (is_typename_at_global_scope (dname))
7758 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7760 name = "<invalid operator>";
7777 return error_mark_node;
7782 if (id_declarator->kind == cdk_id)
7788 The declarator in a function-definition shall have the form
7789 D1 ( parameter-declaration-clause) ... */
7790 if (funcdef_flag && innermost_code != cdk_function)
7792 error ("function definition does not declare parameters");
7793 return error_mark_node;
7796 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7797 && innermost_code != cdk_function
7798 && ! (ctype && !declspecs->any_specifiers_p))
7800 error ("declaration of %qD as non-function", dname);
7801 return error_mark_node;
7804 /* Anything declared one level down from the top level
7805 must be one of the parameters of a function
7806 (because the body is at least two levels down). */
7808 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7809 by not allowing C++ class definitions to specify their parameters
7810 with xdecls (must be spec.d in the parmlist).
7812 Since we now wait to push a class scope until we are sure that
7813 we are in a legitimate method context, we must set oldcname
7814 explicitly (since current_class_name is not yet alive).
7816 We also want to avoid calling this a PARM if it is in a namespace. */
7818 if (decl_context == NORMAL && !toplevel_bindings_p ())
7820 struct cp_binding_level *b = current_binding_level;
7821 current_binding_level = b->level_chain;
7822 if (current_binding_level != 0 && toplevel_bindings_p ())
7823 decl_context = PARM;
7824 current_binding_level = b;
7828 name = decl_context == PARM ? "parameter" : "type name";
7830 /* If there were multiple types specified in the decl-specifier-seq,
7831 issue an error message. */
7832 if (declspecs->multiple_types_p)
7834 error ("two or more data types in declaration of %qs", name);
7835 return error_mark_node;
7838 if (declspecs->conflicting_specifiers_p)
7840 error ("conflicting specifiers in declaration of %qs", name);
7841 return error_mark_node;
7844 /* Extract the basic type from the decl-specifier-seq. */
7845 type = declspecs->type;
7846 if (type == error_mark_node)
7849 type_was_error_mark_node = true;
7851 /* If the entire declaration is itself tagged as deprecated then
7852 suppress reports of deprecated items. */
7853 if (type && TREE_DEPRECATED (type)
7854 && deprecated_state != DEPRECATED_SUPPRESS)
7855 warn_deprecated_use (type, NULL_TREE);
7856 if (type && TREE_CODE (type) == TYPE_DECL)
7858 typedef_decl = type;
7859 type = TREE_TYPE (typedef_decl);
7860 if (TREE_DEPRECATED (type)
7861 && DECL_ARTIFICIAL (typedef_decl)
7862 && deprecated_state != DEPRECATED_SUPPRESS)
7863 warn_deprecated_use (type, NULL_TREE);
7865 /* No type at all: default to `int', and set DEFAULTED_INT
7866 because it was not a user-defined typedef. */
7867 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7869 /* These imply 'int'. */
7870 type = integer_type_node;
7874 explicit_int = declspecs->explicit_int_p;
7875 explicit_char = declspecs->explicit_char_p;
7878 /* See the code below that used this. */
7880 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7882 typedef_type = type;
7885 if (sfk != sfk_conversion)
7886 ctor_return_type = ctype;
7888 if (sfk != sfk_none)
7889 type = check_special_function_return_type (sfk, type,
7891 else if (type == NULL_TREE)
7897 /* We handle `main' specially here, because 'main () { }' is so
7898 common. With no options, it is allowed. With -Wreturn-type,
7899 it is a warning. It is only an error with -pedantic-errors. */
7900 is_main = (funcdef_flag
7901 && dname && MAIN_NAME_P (dname)
7902 && ctype == NULL_TREE
7903 && in_namespace == NULL_TREE
7904 && current_namespace == global_namespace);
7906 if (type_was_error_mark_node)
7907 /* We've already issued an error, don't complain more. */;
7908 else if (in_system_header || flag_ms_extensions)
7909 /* Allow it, sigh. */;
7911 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7913 pedwarn (input_location, OPT_pedantic,
7914 "ISO C++ forbids declaration of %qs with no type", name);
7916 warning (OPT_Wreturn_type,
7917 "ISO C++ forbids declaration of %qs with no type", name);
7919 type = integer_type_node;
7924 /* Now process the modifiers that were specified
7925 and check for invalid combinations. */
7927 /* Long double is a special combination. */
7928 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7931 type = build_qualified_type (long_double_type_node,
7932 cp_type_quals (type));
7935 /* Check all other uses of type modifiers. */
7937 if (unsigned_p || signed_p || long_p || short_p)
7941 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7942 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7943 else if (signed_p && unsigned_p)
7944 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7945 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7946 error ("%<long long%> invalid for %qs", name);
7947 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7948 error ("%<long%> invalid for %qs", name);
7949 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7950 error ("%<short%> invalid for %qs", name);
7951 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7952 error ("%<long%> or %<short%> invalid for %qs", name);
7953 else if ((long_p || short_p) && explicit_char)
7954 error ("%<long%> or %<short%> specified with char for %qs", name);
7955 else if (long_p && short_p)
7956 error ("%<long%> and %<short%> specified together for %qs", name);
7957 else if (type == char16_type_node || type == char32_type_node)
7959 if (signed_p || unsigned_p)
7960 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7961 else if (short_p || long_p)
7962 error ("%<short%> or %<long%> invalid for %qs", name);
7967 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7969 pedwarn (input_location, OPT_pedantic,
7970 "long, short, signed or unsigned used invalidly for %qs",
7972 if (flag_pedantic_errors)
7977 /* Discard the type modifiers if they are invalid. */
7988 /* Decide whether an integer type is signed or not.
7989 Optionally treat bitfields as signed by default. */
7993 It is implementation-defined whether a plain (neither
7994 explicitly signed or unsigned) char, short, int, or long
7995 bit-field is signed or unsigned.
7997 Naturally, we extend this to long long as well. Note that
7998 this does not include wchar_t. */
7999 || (bitfield && !flag_signed_bitfields
8001 /* A typedef for plain `int' without `signed' can be
8002 controlled just like plain `int', but a typedef for
8003 `signed int' cannot be so controlled. */
8005 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8006 && TREE_CODE (type) == INTEGER_TYPE
8007 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8010 type = long_long_unsigned_type_node;
8012 type = long_unsigned_type_node;
8014 type = short_unsigned_type_node;
8015 else if (type == char_type_node)
8016 type = unsigned_char_type_node;
8017 else if (typedef_decl)
8018 type = unsigned_type_for (type);
8020 type = unsigned_type_node;
8022 else if (signed_p && type == char_type_node)
8023 type = signed_char_type_node;
8025 type = long_long_integer_type_node;
8027 type = long_integer_type_node;
8029 type = short_integer_type_node;
8031 if (declspecs->specs[(int)ds_complex])
8033 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8034 error ("complex invalid for %qs", name);
8035 /* If we just have "complex", it is equivalent to
8036 "complex double", but if any modifiers at all are specified it is
8037 the complex form of TYPE. E.g, "complex short" is
8038 "complex short int". */
8040 else if (defaulted_int && ! longlong
8041 && ! (long_p || short_p || signed_p || unsigned_p))
8042 type = complex_double_type_node;
8043 else if (type == integer_type_node)
8044 type = complex_integer_type_node;
8045 else if (type == float_type_node)
8046 type = complex_float_type_node;
8047 else if (type == double_type_node)
8048 type = complex_double_type_node;
8049 else if (type == long_double_type_node)
8050 type = complex_long_double_type_node;
8052 type = build_complex_type (type);
8055 type_quals = TYPE_UNQUALIFIED;
8056 if (declspecs->specs[(int)ds_const])
8057 type_quals |= TYPE_QUAL_CONST;
8058 if (declspecs->specs[(int)ds_volatile])
8059 type_quals |= TYPE_QUAL_VOLATILE;
8060 if (declspecs->specs[(int)ds_restrict])
8061 type_quals |= TYPE_QUAL_RESTRICT;
8062 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8063 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8066 if (TREE_CODE (type) == FUNCTION_TYPE
8067 && type_quals != TYPE_UNQUALIFIED)
8069 /* This was an error in C++98 (cv-qualifiers cannot be added to
8070 a function type), but DR 295 makes the code well-formed by
8071 dropping the extra qualifiers. */
8074 tree bad_type = build_qualified_type (type, type_quals);
8075 pedwarn (input_location, OPT_pedantic,
8076 "ignoring %qV qualifiers added to function type %qT",
8079 type_quals = TYPE_UNQUALIFIED;
8081 type_quals |= cp_type_quals (type);
8082 type = cp_build_qualified_type_real
8083 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8084 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8085 /* We might have ignored or rejected some of the qualifiers. */
8086 type_quals = cp_type_quals (type);
8089 inlinep = !! declspecs->specs[(int)ds_inline];
8090 virtualp = !! declspecs->specs[(int)ds_virtual];
8091 explicitp = !! declspecs->specs[(int)ds_explicit];
8093 storage_class = declspecs->storage_class;
8094 if (storage_class == sc_static)
8095 staticp = 1 + (decl_context == FIELD);
8097 if (virtualp && staticp == 2)
8099 error ("member %qD cannot be declared both virtual and static", dname);
8100 storage_class = sc_none;
8103 friendp = !! declspecs->specs[(int)ds_friend];
8105 if (dependent_name && !friendp)
8107 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8108 return error_mark_node;
8111 /* Issue errors about use of storage classes for parameters. */
8112 if (decl_context == PARM)
8114 if (declspecs->specs[(int)ds_typedef])
8116 error ("typedef declaration invalid in parameter declaration");
8117 return error_mark_node;
8119 else if (storage_class == sc_static
8120 || storage_class == sc_extern
8122 error ("storage class specifiers invalid in parameter declarations");
8124 if (type_uses_auto (type))
8126 error ("parameter declared %<auto%>");
8127 type = error_mark_node;
8131 /* Give error if `virtual' is used outside of class declaration. */
8133 && (current_class_name == NULL_TREE || decl_context != FIELD))
8135 error ("%<virtual%> outside class declaration");
8139 /* Static anonymous unions are dealt with here. */
8140 if (staticp && decl_context == TYPENAME
8142 && ANON_AGGR_TYPE_P (declspecs->type))
8143 decl_context = FIELD;
8145 /* Warn about storage classes that are invalid for certain
8146 kinds of declarations (parameters, typenames, etc.). */
8149 && storage_class != sc_extern
8150 && storage_class != sc_static)
8151 || declspecs->specs[(int)ds_typedef]))
8153 error ("multiple storage classes in declaration of %qs", name);
8156 if (decl_context != NORMAL
8157 && ((storage_class != sc_none
8158 && storage_class != sc_mutable)
8161 if ((decl_context == PARM || decl_context == CATCHPARM)
8162 && (storage_class == sc_register
8163 || storage_class == sc_auto))
8165 else if (declspecs->specs[(int)ds_typedef])
8167 else if (decl_context == FIELD
8168 /* C++ allows static class elements. */
8169 && storage_class == sc_static)
8170 /* C++ also allows inlines and signed and unsigned elements,
8171 but in those cases we don't come in here. */
8175 if (decl_context == FIELD)
8176 error ("storage class specified for %qs", name);
8179 if (decl_context == PARM || decl_context == CATCHPARM)
8180 error ("storage class specified for parameter %qs", name);
8182 error ("storage class specified for typename");
8184 if (storage_class == sc_register
8185 || storage_class == sc_auto
8186 || storage_class == sc_extern
8188 storage_class = sc_none;
8191 else if (storage_class == sc_extern && funcdef_flag
8192 && ! toplevel_bindings_p ())
8193 error ("nested function %qs declared %<extern%>", name);
8194 else if (toplevel_bindings_p ())
8196 if (storage_class == sc_auto)
8197 error ("top-level declaration of %qs specifies %<auto%>", name);
8200 && storage_class != sc_extern
8201 && storage_class != sc_static)
8203 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8208 if (storage_class && friendp)
8210 error ("storage class specifiers invalid in friend function declarations");
8211 storage_class = sc_none;
8216 unqualified_id = NULL_TREE;
8219 unqualified_id = id_declarator->u.id.unqualified_name;
8220 switch (TREE_CODE (unqualified_id))
8223 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8224 if (TYPE_P (unqualified_id))
8225 unqualified_id = constructor_name (unqualified_id);
8228 case IDENTIFIER_NODE:
8229 case TEMPLATE_ID_EXPR:
8237 /* Determine the type of the entity declared by recurring on the
8239 for (; declarator; declarator = declarator->declarator)
8241 const cp_declarator *inner_declarator;
8244 if (type == error_mark_node)
8245 return error_mark_node;
8247 attrs = declarator->attributes;
8253 if (declarator == NULL || declarator->kind == cdk_id)
8254 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8255 if (declarator->kind == cdk_function)
8256 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8257 if (declarator->kind == cdk_array)
8258 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8259 returned_attrs = decl_attributes (&type,
8260 chainon (returned_attrs, attrs),
8264 if (declarator->kind == cdk_id)
8267 inner_declarator = declarator->declarator;
8269 switch (declarator->kind)
8272 type = create_array_type_for_decl (dname, type,
8273 declarator->u.array.bounds);
8281 /* Declaring a function type.
8282 Make sure we have a valid type for the function to return. */
8284 if (type_quals != TYPE_UNQUALIFIED)
8286 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8287 warning (OPT_Wignored_qualifiers,
8288 "type qualifiers ignored on function return type");
8289 /* We now know that the TYPE_QUALS don't apply to the
8290 decl, but to its return type. */
8291 type_quals = TYPE_UNQUALIFIED;
8292 set_no_warning = true;
8294 errmsg = targetm.invalid_return_type (type);
8298 type = integer_type_node;
8301 /* Error about some types functions can't return. */
8303 if (TREE_CODE (type) == FUNCTION_TYPE)
8305 error ("%qs declared as function returning a function", name);
8306 return error_mark_node;
8308 if (TREE_CODE (type) == ARRAY_TYPE)
8310 error ("%qs declared as function returning an array", name);
8311 return error_mark_node;
8314 /* Pick up type qualifiers which should be applied to `this'. */
8315 memfn_quals = declarator->u.function.qualifiers;
8317 /* Pick up the exception specifications. */
8318 raises = declarator->u.function.exception_specification;
8320 /* Say it's a definition only for the CALL_EXPR
8321 closest to the identifier. */
8322 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8324 /* Handle a late-specified return type. */
8327 if (type_uses_auto (type))
8329 if (!declarator->u.function.late_return_type)
8331 error ("%qs function uses %<auto%> type specifier without"
8332 " late return type", name);
8333 return error_mark_node;
8335 else if (!is_auto (type))
8337 error ("%qs function with late return type has"
8338 " %qT as its type rather than plain %<auto%>",
8340 return error_mark_node;
8343 else if (declarator->u.function.late_return_type)
8345 error ("%qs function with late return type not declared"
8346 " with %<auto%> type specifier", name);
8347 return error_mark_node;
8350 type = splice_late_return_type
8351 (type, declarator->u.function.late_return_type);
8352 if (type == error_mark_node)
8353 return error_mark_node;
8355 if (ctype == NULL_TREE
8356 && decl_context == FIELD
8358 && (friendp == 0 || dname == current_class_name))
8359 ctype = current_class_type;
8361 if (ctype && (sfk == sfk_constructor
8362 || sfk == sfk_destructor))
8364 /* We are within a class's scope. If our declarator name
8365 is the same as the class name, and we are defining
8366 a function, then it is a constructor/destructor, and
8367 therefore returns a void type. */
8369 /* ISO C++ 12.4/2. A destructor may not be declared
8370 const or volatile. A destructor may not be
8373 ISO C++ 12.1. A constructor may not be declared
8374 const or volatile. A constructor may not be
8375 virtual. A constructor may not be static. */
8377 error ((flags == DTOR_FLAG)
8378 ? "destructor cannot be static member function"
8379 : "constructor cannot be static member function");
8382 error ((flags == DTOR_FLAG)
8383 ? "destructors may not be cv-qualified"
8384 : "constructors may not be cv-qualified");
8385 memfn_quals = TYPE_UNQUALIFIED;
8388 if (decl_context == FIELD
8389 && !member_function_or_else (ctype,
8392 return error_mark_node;
8394 if (flags != DTOR_FLAG)
8396 /* It's a constructor. */
8401 permerror (input_location, "constructors cannot be declared virtual");
8404 if (decl_context == FIELD
8405 && sfk != sfk_constructor)
8406 return error_mark_node;
8408 if (decl_context == FIELD)
8414 error ("can't initialize friend function %qs", name);
8417 /* Cannot be both friend and virtual. */
8418 error ("virtual functions cannot be friends");
8421 if (decl_context == NORMAL)
8422 error ("friend declaration not in class definition");
8423 if (current_function_decl && funcdef_flag)
8424 error ("can't define friend function %qs in a local "
8428 else if (ctype && sfk == sfk_conversion)
8432 maybe_warn_cpp0x ("explicit conversion operators");
8437 arg_types = grokparms (declarator->u.function.parameters,
8440 if (inner_declarator
8441 && inner_declarator->kind == cdk_id
8442 && inner_declarator->u.id.sfk == sfk_destructor
8443 && arg_types != void_list_node)
8445 error ("destructors may not have parameters");
8446 arg_types = void_list_node;
8450 type = build_function_type (type, arg_types);
8457 /* Filter out pointers-to-references and references-to-references.
8458 We can get these if a TYPE_DECL is used. */
8460 if (TREE_CODE (type) == REFERENCE_TYPE)
8462 if (declarator->kind != cdk_reference)
8464 error ("cannot declare pointer to %q#T", type);
8465 type = TREE_TYPE (type);
8468 /* In C++0x, we allow reference to reference declarations
8469 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8470 and template type arguments [14.3.1/4 temp.arg.type]. The
8471 check for direct reference to reference declarations, which
8472 are still forbidden, occurs below. Reasoning behind the change
8473 can be found in DR106, DR540, and the rvalue reference
8475 else if (cxx_dialect == cxx98)
8477 error ("cannot declare reference to %q#T", type);
8478 type = TREE_TYPE (type);
8481 else if (VOID_TYPE_P (type))
8483 if (declarator->kind == cdk_reference)
8484 error ("cannot declare reference to %q#T", type);
8485 else if (declarator->kind == cdk_ptrmem)
8486 error ("cannot declare pointer to %q#T member", type);
8489 /* We now know that the TYPE_QUALS don't apply to the decl,
8490 but to the target of the pointer. */
8491 type_quals = TYPE_UNQUALIFIED;
8493 if (declarator->kind == cdk_ptrmem
8494 && (TREE_CODE (type) == FUNCTION_TYPE
8495 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8497 memfn_quals |= cp_type_quals (type);
8498 type = build_memfn_type (type,
8499 declarator->u.pointer.class_type,
8501 memfn_quals = TYPE_UNQUALIFIED;
8504 if (TREE_CODE (type) == FUNCTION_TYPE
8505 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8506 error ("cannot declare %s to qualified function type %qT",
8507 declarator->kind == cdk_reference ? "reference" : "pointer",
8510 if (declarator->kind == cdk_reference)
8512 /* In C++0x, the type we are creating a reference to might be
8513 a typedef which is itself a reference type. In that case,
8514 we follow the reference collapsing rules in
8515 [7.1.3/8 dcl.typedef] to create the final reference type:
8517 "If a typedef TD names a type that is a reference to a type
8518 T, an attempt to create the type 'lvalue reference to cv TD'
8519 creates the type 'lvalue reference to T,' while an attempt
8520 to create the type "rvalue reference to cv TD' creates the
8523 if (!VOID_TYPE_P (type))
8524 type = cp_build_reference_type
8525 ((TREE_CODE (type) == REFERENCE_TYPE
8526 ? TREE_TYPE (type) : type),
8527 (declarator->u.reference.rvalue_ref
8528 && (TREE_CODE(type) != REFERENCE_TYPE
8529 || TYPE_REF_IS_RVALUE (type))));
8531 /* In C++0x, we need this check for direct reference to
8532 reference declarations, which are forbidden by
8533 [8.3.2/5 dcl.ref]. Reference to reference declarations
8534 are only allowed indirectly through typedefs and template
8535 type arguments. Example:
8537 void foo(int & &); // invalid ref-to-ref decl
8539 typedef int & int_ref;
8540 void foo(int_ref &); // valid ref-to-ref decl
8542 if (inner_declarator && inner_declarator->kind == cdk_reference)
8543 error ("cannot declare reference to %q#T, which is not "
8544 "a typedef or a template type argument", type);
8546 else if (TREE_CODE (type) == METHOD_TYPE)
8547 type = build_ptrmemfunc_type (build_pointer_type (type));
8548 else if (declarator->kind == cdk_ptrmem)
8550 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8552 if (declarator->u.pointer.class_type == error_mark_node)
8553 /* We will already have complained. */
8554 type = error_mark_node;
8556 type = build_ptrmem_type (declarator->u.pointer.class_type,
8560 type = build_pointer_type (type);
8562 /* Process a list of type modifier keywords (such as
8563 const or volatile) that were given inside the `*' or `&'. */
8565 if (declarator->u.pointer.qualifiers)
8568 = cp_build_qualified_type (type,
8569 declarator->u.pointer.qualifiers);
8570 type_quals = cp_type_quals (type);
8583 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8584 && TREE_CODE (type) != FUNCTION_TYPE
8585 && TREE_CODE (type) != METHOD_TYPE)
8587 error ("template-id %qD used as a declarator",
8589 unqualified_id = dname;
8592 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8593 qualified with a class-name, turn it into a METHOD_TYPE, unless
8594 we know that the function is static. We take advantage of this
8595 opportunity to do other processing that pertains to entities
8596 explicitly declared to be class members. Note that if DECLARATOR
8597 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8598 would not have exited the loop above. */
8600 && declarator->u.id.qualifying_scope
8601 && TYPE_P (declarator->u.id.qualifying_scope))
8605 ctype = declarator->u.id.qualifying_scope;
8606 ctype = TYPE_MAIN_VARIANT (ctype);
8608 while (t != NULL_TREE && CLASS_TYPE_P (t))
8610 /* You're supposed to have one `template <...>' for every
8611 template class, but you don't need one for a full
8612 specialization. For example:
8614 template <class T> struct S{};
8615 template <> struct S<int> { void f(); };
8616 void S<int>::f () {}
8618 is correct; there shouldn't be a `template <>' for the
8619 definition of `S<int>::f'. */
8620 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8621 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8622 /* T is an explicit (not partial) specialization. All
8623 containing classes must therefore also be explicitly
8626 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8627 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8628 template_count += 1;
8630 t = TYPE_MAIN_DECL (t);
8631 t = DECL_CONTEXT (t);
8634 if (ctype == current_class_type)
8638 permerror (input_location, "member functions are implicitly friends of their class");
8642 permerror (declarator->id_loc,
8643 "extra qualification %<%T::%> on member %qs",
8646 else if (/* If the qualifying type is already complete, then we
8647 can skip the following checks. */
8648 !COMPLETE_TYPE_P (ctype)
8649 && (/* If the function is being defined, then
8650 qualifying type must certainly be complete. */
8652 /* A friend declaration of "T::f" is OK, even if
8653 "T" is a template parameter. But, if this
8654 function is not a friend, the qualifying type
8656 || (!friendp && !CLASS_TYPE_P (ctype))
8657 /* For a declaration, the type need not be
8658 complete, if either it is dependent (since there
8659 is no meaningful definition of complete in that
8660 case) or the qualifying class is currently being
8662 || !(dependent_type_p (ctype)
8663 || currently_open_class (ctype)))
8664 /* Check that the qualifying type is complete. */
8665 && !complete_type_or_else (ctype, NULL_TREE))
8666 return error_mark_node;
8667 else if (TREE_CODE (type) == FUNCTION_TYPE)
8669 tree sname = declarator->u.id.unqualified_name;
8671 if (current_class_type
8672 && (!friendp || funcdef_flag))
8675 ? "cannot define member function %<%T::%s%> within %<%T%>"
8676 : "cannot declare member function %<%T::%s%> within %<%T%>",
8677 ctype, name, current_class_type);
8678 return error_mark_node;
8681 if (TREE_CODE (sname) == IDENTIFIER_NODE
8682 && NEW_DELETE_OPNAME_P (sname))
8683 /* Overloaded operator new and operator delete
8684 are always static functions. */
8687 type = build_memfn_type (type, ctype, memfn_quals);
8689 else if (declspecs->specs[(int)ds_typedef]
8690 && current_class_type)
8692 error ("cannot declare member %<%T::%s%> within %qT",
8693 ctype, name, current_class_type);
8694 return error_mark_node;
8698 /* Now TYPE has the actual type. */
8703 *attrlist = chainon (returned_attrs, *attrlist);
8705 attrlist = &returned_attrs;
8708 /* Handle parameter packs. */
8709 if (parameter_pack_p)
8711 if (decl_context == PARM)
8712 /* Turn the type into a pack expansion.*/
8713 type = make_pack_expansion (type);
8715 error ("non-parameter %qs cannot be a parameter pack", name);
8718 /* Did array size calculations overflow? */
8720 if (TREE_CODE (type) == ARRAY_TYPE
8721 && COMPLETE_TYPE_P (type)
8722 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8723 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8725 error ("size of array %qs is too large", name);
8726 /* If we proceed with the array type as it is, we'll eventually
8727 crash in tree_low_cst(). */
8728 type = error_mark_node;
8731 if ((decl_context == FIELD || decl_context == PARM)
8732 && !processing_template_decl
8733 && variably_modified_type_p (type, NULL_TREE))
8735 if (decl_context == FIELD)
8736 error ("data member may not have variably modified type %qT", type);
8738 error ("parameter may not have variably modified type %qT", type);
8739 type = error_mark_node;
8742 if (explicitp == 1 || (explicitp && friendp))
8744 /* [dcl.fct.spec] The explicit specifier shall only be used in
8745 declarations of constructors within a class definition. */
8746 error ("only declarations of constructors can be %<explicit%>");
8750 if (storage_class == sc_mutable)
8752 if (decl_context != FIELD || friendp)
8754 error ("non-member %qs cannot be declared %<mutable%>", name);
8755 storage_class = sc_none;
8757 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8759 error ("non-object member %qs cannot be declared %<mutable%>", name);
8760 storage_class = sc_none;
8762 else if (TREE_CODE (type) == FUNCTION_TYPE
8763 || TREE_CODE (type) == METHOD_TYPE)
8765 error ("function %qs cannot be declared %<mutable%>", name);
8766 storage_class = sc_none;
8770 error ("static %qs cannot be declared %<mutable%>", name);
8771 storage_class = sc_none;
8773 else if (type_quals & TYPE_QUAL_CONST)
8775 error ("const %qs cannot be declared %<mutable%>", name);
8776 storage_class = sc_none;
8780 /* If this is declaring a typedef name, return a TYPE_DECL. */
8781 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8785 /* Note that the grammar rejects storage classes
8786 in typenames, fields or parameters. */
8787 if (current_lang_name == lang_name_java)
8788 TYPE_FOR_JAVA (type) = 1;
8790 /* This declaration:
8792 typedef void f(int) const;
8794 declares a function type which is not a member of any
8795 particular class, but which is cv-qualified; for
8796 example "f S::*" declares a pointer to a const-qualified
8797 member function of S. We record the cv-qualification in the
8799 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8801 type = cp_build_qualified_type (type, memfn_quals);
8803 /* We have now dealt with these qualifiers. */
8804 memfn_quals = TYPE_UNQUALIFIED;
8807 if (decl_context == FIELD)
8808 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8810 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8811 if (id_declarator && declarator->u.id.qualifying_scope) {
8812 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8813 TREE_TYPE (decl) = error_mark_node;
8816 if (decl_context != FIELD)
8818 if (!current_function_decl)
8819 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8820 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8821 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8822 (current_function_decl)))
8823 /* The TYPE_DECL is "abstract" because there will be
8824 clones of this constructor/destructor, and there will
8825 be copies of this TYPE_DECL generated in those
8827 DECL_ABSTRACT (decl) = 1;
8829 else if (constructor_name_p (unqualified_id, current_class_type))
8830 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8831 "as enclosing class",
8834 /* If the user declares "typedef struct {...} foo" then the
8835 struct will have an anonymous name. Fill that name in now.
8836 Nothing can refer to it, so nothing needs know about the name
8838 if (type != error_mark_node
8841 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8842 && TYPE_ANONYMOUS_P (type)
8843 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8847 /* Replace the anonymous name with the real name everywhere. */
8848 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8850 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8852 debug_hooks->set_name (t, decl);
8853 TYPE_NAME (t) = decl;
8857 if (TYPE_LANG_SPECIFIC (type))
8858 TYPE_WAS_ANONYMOUS (type) = 1;
8860 /* If this is a typedef within a template class, the nested
8861 type is a (non-primary) template. The name for the
8862 template needs updating as well. */
8863 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8864 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8865 = TYPE_IDENTIFIER (type);
8867 /* FIXME remangle member functions; member functions of a
8868 type with external linkage have external linkage. */
8872 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8873 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8875 bad_specifiers (decl, "type", virtualp,
8876 memfn_quals != TYPE_UNQUALIFIED,
8877 inlinep, friendp, raises != NULL_TREE);
8882 /* Detect the case of an array type of unspecified size
8883 which came, as such, direct from a typedef name.
8884 We must copy the type, so that the array's domain can be
8885 individually set by the object's initializer. */
8887 if (type && typedef_type
8888 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8889 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8890 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8892 /* Detect where we're using a typedef of function type to declare a
8893 function. PARMS will not be set, so we must create it now. */
8895 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8897 tree decls = NULL_TREE;
8900 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8902 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8904 TREE_CHAIN (decl) = decls;
8908 parms = nreverse (decls);
8910 if (decl_context != TYPENAME)
8912 /* A cv-qualifier-seq shall only be part of the function type
8913 for a non-static member function. [8.3.5/4 dcl.fct] */
8914 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8915 && (current_class_type == NULL_TREE || staticp) )
8918 ? G_("qualified function types cannot be used to "
8919 "declare static member functions")
8920 : G_("qualified function types cannot be used to "
8921 "declare free functions"));
8922 type = TYPE_MAIN_VARIANT (type);
8925 /* The qualifiers on the function type become the qualifiers on
8926 the non-static member function. */
8927 memfn_quals |= cp_type_quals (type);
8931 /* If this is a type name (such as, in a cast or sizeof),
8932 compute the type and return it now. */
8934 if (decl_context == TYPENAME)
8936 /* Note that the grammar rejects storage classes
8937 in typenames, fields or parameters. */
8938 if (type_quals != TYPE_UNQUALIFIED)
8939 type_quals = TYPE_UNQUALIFIED;
8941 /* Special case: "friend class foo" looks like a TYPENAME context. */
8944 if (type_quals != TYPE_UNQUALIFIED)
8946 error ("type qualifiers specified for friend class declaration");
8947 type_quals = TYPE_UNQUALIFIED;
8951 error ("%<inline%> specified for friend class declaration");
8957 /* Don't allow friend declaration without a class-key. */
8958 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8959 permerror (input_location, "template parameters cannot be friends");
8960 else if (TREE_CODE (type) == TYPENAME_TYPE)
8961 permerror (input_location, "friend declaration requires class-key, "
8962 "i.e. %<friend class %T::%D%>",
8963 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8965 permerror (input_location, "friend declaration requires class-key, "
8966 "i.e. %<friend %#T%>",
8970 /* Only try to do this stuff if we didn't already give up. */
8971 if (type != integer_type_node)
8973 /* A friendly class? */
8974 if (current_class_type)
8975 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8978 error ("trying to make class %qT a friend of global scope",
8981 type = void_type_node;
8984 else if (memfn_quals)
8986 if (ctype == NULL_TREE
8987 && TREE_CODE (type) == METHOD_TYPE)
8988 ctype = TYPE_METHOD_BASETYPE (type);
8991 type = build_memfn_type (type, ctype, memfn_quals);
8992 /* Core issue #547: need to allow this in template type args. */
8993 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8994 type = cp_build_qualified_type (type, memfn_quals);
8996 error ("invalid qualifiers on non-member function type");
9001 else if (unqualified_id == NULL_TREE && decl_context != PARM
9002 && decl_context != CATCHPARM
9003 && TREE_CODE (type) != UNION_TYPE
9006 error ("abstract declarator %qT used as declaration", type);
9007 return error_mark_node;
9010 /* Only functions may be declared using an operator-function-id. */
9012 && IDENTIFIER_OPNAME_P (unqualified_id)
9013 && TREE_CODE (type) != FUNCTION_TYPE
9014 && TREE_CODE (type) != METHOD_TYPE)
9016 error ("declaration of %qD as non-function", unqualified_id);
9017 return error_mark_node;
9020 /* We don't check parameter types here because we can emit a better
9021 error message later. */
9022 if (decl_context != PARM)
9024 type = check_var_type (unqualified_id, type);
9025 if (type == error_mark_node)
9026 return error_mark_node;
9029 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9030 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9032 if (decl_context == PARM || decl_context == CATCHPARM)
9034 if (ctype || in_namespace)
9035 error ("cannot use %<::%> in parameter declaration");
9037 /* A parameter declared as an array of T is really a pointer to T.
9038 One declared as a function is really a pointer to a function.
9039 One declared as a member is really a pointer to member. */
9041 if (TREE_CODE (type) == ARRAY_TYPE)
9043 /* Transfer const-ness of array into that of type pointed to. */
9044 type = build_pointer_type (TREE_TYPE (type));
9045 type_quals = TYPE_UNQUALIFIED;
9047 else if (TREE_CODE (type) == FUNCTION_TYPE)
9048 type = build_pointer_type (type);
9054 if (decl_context == PARM)
9056 decl = cp_build_parm_decl (unqualified_id, type);
9058 bad_specifiers (decl, "parameter", virtualp,
9059 memfn_quals != TYPE_UNQUALIFIED,
9060 inlinep, friendp, raises != NULL_TREE);
9062 else if (decl_context == FIELD)
9064 /* The C99 flexible array extension. */
9065 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9066 && TYPE_DOMAIN (type) == NULL_TREE)
9068 tree itype = compute_array_index_type (dname, integer_zero_node);
9069 type = build_cplus_array_type (TREE_TYPE (type), itype);
9072 if (type == error_mark_node)
9074 /* Happens when declaring arrays of sizes which
9075 are error_mark_node, for example. */
9078 else if (in_namespace && !friendp)
9080 /* Something like struct S { int N::j; }; */
9081 error ("invalid use of %<::%>");
9082 return error_mark_node;
9084 else if (TREE_CODE (type) == FUNCTION_TYPE)
9087 tree function_context;
9091 if (ctype == NULL_TREE)
9092 ctype = current_class_type;
9094 if (ctype == NULL_TREE)
9096 error ("can't make %qD into a method -- not in a class",
9098 return error_mark_node;
9101 /* ``A union may [ ... ] not [ have ] virtual functions.''
9103 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9105 error ("function %qD declared virtual inside a union",
9107 return error_mark_node;
9110 if (NEW_DELETE_OPNAME_P (unqualified_id))
9114 error ("%qD cannot be declared virtual, since it "
9120 else if (staticp < 2)
9121 type = build_memfn_type (type, ctype, memfn_quals);
9124 /* Check that the name used for a destructor makes sense. */
9125 if (sfk == sfk_destructor)
9127 tree uqname = id_declarator->u.id.unqualified_name;
9131 gcc_assert (friendp);
9132 error ("expected qualified name in friend declaration "
9133 "for destructor %qD", uqname);
9134 return error_mark_node;
9137 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9139 error ("declaration of %qD as member of %qT",
9141 return error_mark_node;
9144 else if (sfk == sfk_constructor && friendp)
9146 error ("expected qualified name in friend declaration "
9147 "for constructor %qD",
9148 id_declarator->u.id.unqualified_name);
9149 return error_mark_node;
9152 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9153 function_context = (ctype != NULL_TREE) ?
9154 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9155 publicp = (! friendp || ! staticp)
9156 && function_context == NULL_TREE;
9157 decl = grokfndecl (ctype, type,
9158 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9159 ? unqualified_id : dname,
9162 virtualp, flags, memfn_quals, raises,
9163 friendp ? -1 : 0, friendp, publicp, inlinep,
9165 funcdef_flag, template_count, in_namespace,
9166 attrlist, declarator->id_loc);
9167 if (decl == NULL_TREE)
9168 return error_mark_node;
9170 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9171 /* The decl and setting of decl_attr is also turned off. */
9172 decl = build_decl_attribute_variant (decl, decl_attr);
9175 /* [class.conv.ctor]
9177 A constructor declared without the function-specifier
9178 explicit that can be called with a single parameter
9179 specifies a conversion from the type of its first
9180 parameter to the type of its class. Such a constructor
9181 is called a converting constructor. */
9183 DECL_NONCONVERTING_P (decl) = 1;
9185 else if (TREE_CODE (type) == METHOD_TYPE)
9187 /* We only get here for friend declarations of
9188 members of other classes. */
9189 /* All method decls are public, so tell grokfndecl to set
9190 TREE_PUBLIC, also. */
9191 decl = grokfndecl (ctype, type,
9192 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9193 ? unqualified_id : dname,
9196 virtualp, flags, memfn_quals, raises,
9197 friendp ? -1 : 0, friendp, 1, 0, sfk,
9198 funcdef_flag, template_count, in_namespace,
9200 declarator->id_loc);
9201 if (decl == NULL_TREE)
9202 return error_mark_node;
9204 else if (!staticp && !dependent_type_p (type)
9205 && !COMPLETE_TYPE_P (complete_type (type))
9206 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9209 error ("field %qD has incomplete type", unqualified_id);
9211 error ("name %qT has incomplete type", type);
9213 /* If we're instantiating a template, tell them which
9214 instantiation made the field's type be incomplete. */
9215 if (current_class_type
9216 && TYPE_NAME (current_class_type)
9217 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9219 && declspecs->type == type)
9220 error (" in instantiation of template %qT",
9221 current_class_type);
9223 return error_mark_node;
9229 error ("%qE is neither function nor member function; "
9230 "cannot be declared friend", unqualified_id);
9238 /* Friends are treated specially. */
9239 if (ctype == current_class_type)
9240 ; /* We already issued a permerror. */
9241 else if (decl && DECL_NAME (decl))
9243 if (template_class_depth (current_class_type) == 0)
9245 decl = check_explicit_specialization
9246 (unqualified_id, decl, template_count,
9247 2 * funcdef_flag + 4);
9248 if (decl == error_mark_node)
9249 return error_mark_node;
9252 decl = do_friend (ctype, unqualified_id, decl,
9258 return error_mark_node;
9261 /* Structure field. It may not be a function, except for C++. */
9263 if (decl == NULL_TREE)
9269 /* An attempt is being made to initialize a non-static
9270 member. But, from [class.mem]:
9272 4 A member-declarator can contain a
9273 constant-initializer only if it declares a static
9274 member (_class.static_) of integral or enumeration
9275 type, see _class.static.data_.
9277 This used to be relatively common practice, but
9278 the rest of the compiler does not correctly
9279 handle the initialization unless the member is
9280 static so we make it static below. */
9281 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9283 permerror (input_location, "making %qD static", unqualified_id);
9287 if (uses_template_parms (type))
9288 /* We'll check at instantiation time. */
9290 else if (check_static_variable_definition (unqualified_id,
9292 /* If we just return the declaration, crashes
9293 will sometimes occur. We therefore return
9294 void_type_node, as if this was a friend
9295 declaration, to cause callers to completely
9296 ignore this declaration. */
9297 return error_mark_node;
9302 /* C++ allows static class members. All other work
9303 for this is done by grokfield. */
9304 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9305 set_linkage_for_static_data_member (decl);
9306 /* Even if there is an in-class initialization, DECL
9307 is considered undefined until an out-of-class
9308 definition is provided. */
9309 DECL_EXTERNAL (decl) = 1;
9312 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9316 decl = build_decl (input_location,
9317 FIELD_DECL, unqualified_id, type);
9318 DECL_NONADDRESSABLE_P (decl) = bitfield;
9319 if (bitfield && !unqualified_id)
9320 TREE_NO_WARNING (decl) = 1;
9322 if (storage_class == sc_mutable)
9324 DECL_MUTABLE_P (decl) = 1;
9325 storage_class = sc_none;
9329 bad_specifiers (decl, "field", virtualp,
9330 memfn_quals != TYPE_UNQUALIFIED,
9331 inlinep, friendp, raises != NULL_TREE);
9334 else if (TREE_CODE (type) == FUNCTION_TYPE
9335 || TREE_CODE (type) == METHOD_TYPE)
9340 if (!unqualified_id)
9341 return error_mark_node;
9343 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9344 original_name = dname;
9346 original_name = unqualified_id;
9348 if (storage_class == sc_auto)
9349 error ("storage class %<auto%> invalid for function %qs", name);
9350 else if (storage_class == sc_register)
9351 error ("storage class %<register%> invalid for function %qs", name);
9353 error ("storage class %<__thread%> invalid for function %qs", name);
9355 /* Function declaration not at top level.
9356 Storage classes other than `extern' are not allowed
9357 and `extern' makes no difference. */
9358 if (! toplevel_bindings_p ()
9359 && (storage_class == sc_static
9360 || declspecs->specs[(int)ds_inline])
9363 if (storage_class == sc_static)
9364 pedwarn (input_location, OPT_pedantic,
9365 "%<static%> specified invalid for function %qs "
9366 "declared out of global scope", name);
9368 pedwarn (input_location, OPT_pedantic,
9369 "%<inline%> specifier invalid for function %qs "
9370 "declared out of global scope", name);
9373 if (ctype != NULL_TREE
9374 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9376 error ("%q#T is not a class or a namespace", ctype);
9380 if (ctype == NULL_TREE)
9384 error ("virtual non-class function %qs", name);
9387 else if (sfk == sfk_constructor
9388 || sfk == sfk_destructor)
9391 ? "%qs defined in a non-class scope"
9392 : "%qs declared in a non-class scope", name);
9396 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9397 && !NEW_DELETE_OPNAME_P (original_name))
9398 type = build_method_type_directly (ctype,
9400 TYPE_ARG_TYPES (type));
9402 /* Record presence of `static'. */
9403 publicp = (ctype != NULL_TREE
9404 || storage_class == sc_extern
9405 || storage_class != sc_static);
9407 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9408 virtualp, flags, memfn_quals, raises,
9410 publicp, inlinep, sfk, funcdef_flag,
9411 template_count, in_namespace, attrlist,
9412 declarator->id_loc);
9413 if (decl == NULL_TREE)
9414 return error_mark_node;
9418 int invalid_static = 0;
9420 /* Don't allow a static member function in a class, and forbid
9421 declaring main to be static. */
9422 if (TREE_CODE (type) == METHOD_TYPE)
9424 permerror (input_location, "cannot declare member function %qD to have "
9425 "static linkage", decl);
9428 else if (current_function_decl)
9430 /* FIXME need arm citation */
9431 error ("cannot declare static function inside another function");
9438 storage_class = sc_none;
9444 /* It's a variable. */
9446 /* An uninitialized decl with `extern' is a reference. */
9447 decl = grokvardecl (type, unqualified_id,
9450 (type_quals & TYPE_QUAL_CONST) != 0,
9451 ctype ? ctype : in_namespace);
9452 bad_specifiers (decl, "variable", virtualp,
9453 memfn_quals != TYPE_UNQUALIFIED,
9454 inlinep, friendp, raises != NULL_TREE);
9458 DECL_CONTEXT (decl) = ctype;
9461 permerror (input_location, "%<static%> may not be used when defining "
9462 "(as opposed to declaring) a static data member");
9464 storage_class = sc_none;
9466 if (storage_class == sc_register && TREE_STATIC (decl))
9468 error ("static member %qD declared %<register%>", decl);
9469 storage_class = sc_none;
9471 if (storage_class == sc_extern && pedantic)
9473 pedwarn (input_location, OPT_pedantic,
9474 "cannot explicitly declare member %q#D to have "
9475 "extern linkage", decl);
9476 storage_class = sc_none;
9481 if (storage_class == sc_extern && initialized && !funcdef_flag)
9483 if (toplevel_bindings_p ())
9485 /* It's common practice (and completely valid) to have a const
9486 be initialized and declared extern. */
9487 if (!(type_quals & TYPE_QUAL_CONST))
9488 warning (0, "%qs initialized and declared %<extern%>", name);
9492 error ("%qs has both %<extern%> and initializer", name);
9493 return error_mark_node;
9497 /* Record `register' declaration for warnings on &
9498 and in case doing stupid register allocation. */
9500 if (storage_class == sc_register)
9501 DECL_REGISTER (decl) = 1;
9502 else if (storage_class == sc_extern)
9503 DECL_THIS_EXTERN (decl) = 1;
9504 else if (storage_class == sc_static)
9505 DECL_THIS_STATIC (decl) = 1;
9507 /* Record constancy and volatility on the DECL itself . There's
9508 no need to do this when processing a template; we'll do this
9509 for the instantiated declaration based on the type of DECL. */
9510 if (!processing_template_decl)
9511 cp_apply_type_quals_to_decl (type_quals, decl);
9514 TREE_NO_WARNING (decl) = 1;
9520 /* Subroutine of start_function. Ensure that each of the parameter
9521 types (as listed in PARMS) is complete, as is required for a
9522 function definition. */
9525 require_complete_types_for_parms (tree parms)
9527 for (; parms; parms = TREE_CHAIN (parms))
9529 if (dependent_type_p (TREE_TYPE (parms)))
9531 if (!VOID_TYPE_P (TREE_TYPE (parms))
9532 && complete_type_or_else (TREE_TYPE (parms), parms))
9534 relayout_decl (parms);
9535 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9538 /* grokparms or complete_type_or_else will have already issued
9540 TREE_TYPE (parms) = error_mark_node;
9544 /* Returns nonzero if T is a local variable. */
9547 local_variable_p (const_tree t)
9549 if ((TREE_CODE (t) == VAR_DECL
9550 /* A VAR_DECL with a context that is a _TYPE is a static data
9552 && !TYPE_P (CP_DECL_CONTEXT (t))
9553 /* Any other non-local variable must be at namespace scope. */
9554 && !DECL_NAMESPACE_SCOPE_P (t))
9555 || (TREE_CODE (t) == PARM_DECL))
9561 /* Like local_variable_p, but suitable for use as a tree-walking
9565 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9566 void *data ATTRIBUTE_UNUSED)
9568 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9570 else if (TYPE_P (*tp))
9577 /* Check that ARG, which is a default-argument expression for a
9578 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9579 something goes wrong. DECL may also be a _TYPE node, rather than a
9580 DECL, if there is no DECL available. */
9583 check_default_argument (tree decl, tree arg)
9588 if (TREE_CODE (arg) == DEFAULT_ARG)
9589 /* We get a DEFAULT_ARG when looking at an in-class declaration
9590 with a default argument. Ignore the argument for now; we'll
9591 deal with it after the class is complete. */
9600 decl_type = TREE_TYPE (decl);
9602 if (arg == error_mark_node
9603 || decl == error_mark_node
9604 || TREE_TYPE (arg) == error_mark_node
9605 || decl_type == error_mark_node)
9606 /* Something already went wrong. There's no need to check
9608 return error_mark_node;
9610 /* [dcl.fct.default]
9612 A default argument expression is implicitly converted to the
9614 if (!TREE_TYPE (arg)
9615 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9618 error ("default argument for %q#D has type %qT",
9619 decl, TREE_TYPE (arg));
9621 error ("default argument for parameter of type %qT has type %qT",
9622 decl_type, TREE_TYPE (arg));
9624 return error_mark_node;
9627 /* [dcl.fct.default]
9629 Local variables shall not be used in default argument
9632 The keyword `this' shall not be used in a default argument of a
9634 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9637 error ("default argument %qE uses local variable %qD", arg, var);
9638 return error_mark_node;
9645 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9648 type_is_deprecated (tree type)
9650 enum tree_code code;
9651 if (TREE_DEPRECATED (type))
9653 if (TYPE_NAME (type)
9654 && TREE_DEPRECATED (TYPE_NAME (type)))
9657 code = TREE_CODE (type);
9659 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9660 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9661 || code == METHOD_TYPE || code == ARRAY_TYPE)
9662 return type_is_deprecated (TREE_TYPE (type));
9664 if (TYPE_PTRMEMFUNC_P (type))
9665 return type_is_deprecated
9666 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9671 /* Decode the list of parameter types for a function type.
9672 Given the list of things declared inside the parens,
9673 return a list of types.
9675 If this parameter does not end with an ellipsis, we append
9678 *PARMS is set to the chain of PARM_DECLs created. */
9681 grokparms (tree parmlist, tree *parms)
9683 tree result = NULL_TREE;
9684 tree decls = NULL_TREE;
9688 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9690 tree type = NULL_TREE;
9691 tree init = TREE_PURPOSE (parm);
9692 tree decl = TREE_VALUE (parm);
9695 if (parm == void_list_node)
9698 if (! decl || TREE_TYPE (decl) == error_mark_node)
9701 type = TREE_TYPE (decl);
9702 if (VOID_TYPE_P (type))
9704 if (same_type_p (type, void_type_node)
9705 && DECL_SELF_REFERENCE_P (type)
9706 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9707 /* this is a parmlist of `(void)', which is ok. */
9709 cxx_incomplete_type_error (decl, type);
9710 /* It's not a good idea to actually create parameters of
9711 type `void'; other parts of the compiler assume that a
9712 void type terminates the parameter list. */
9713 type = error_mark_node;
9714 TREE_TYPE (decl) = error_mark_node;
9717 if (type != error_mark_node
9718 && TYPE_FOR_JAVA (type)
9719 && MAYBE_CLASS_TYPE_P (type))
9721 error ("parameter %qD has Java class type", decl);
9722 type = error_mark_node;
9723 TREE_TYPE (decl) = error_mark_node;
9727 if (type != error_mark_node
9728 && (errmsg = targetm.invalid_parameter_type (type)))
9731 type = error_mark_node;
9732 TREE_TYPE (decl) = error_mark_node;
9735 if (type != error_mark_node)
9737 if (deprecated_state != DEPRECATED_SUPPRESS)
9739 tree deptype = type_is_deprecated (type);
9741 warn_deprecated_use (deptype, NULL_TREE);
9744 /* Top-level qualifiers on the parameters are
9745 ignored for function types. */
9746 type = cp_build_qualified_type (type, 0);
9747 if (TREE_CODE (type) == METHOD_TYPE)
9749 error ("parameter %qD invalidly declared method type", decl);
9750 type = build_pointer_type (type);
9751 TREE_TYPE (decl) = type;
9753 else if (abstract_virtuals_error (decl, type))
9754 any_error = 1; /* Seems like a good idea. */
9755 else if (POINTER_TYPE_P (type))
9757 /* [dcl.fct]/6, parameter types cannot contain pointers
9758 (references) to arrays of unknown bound. */
9759 tree t = TREE_TYPE (type);
9760 int ptr = TYPE_PTR_P (type);
9766 else if (TREE_CODE (t) != ARRAY_TYPE)
9768 else if (!TYPE_DOMAIN (t))
9772 if (TREE_CODE (t) == ARRAY_TYPE)
9773 error ("parameter %qD includes %s to array of unknown "
9775 decl, ptr ? "pointer" : "reference", t);
9780 else if (init && !processing_template_decl)
9781 init = check_default_argument (decl, init);
9784 if (TREE_CODE (decl) == PARM_DECL
9785 && FUNCTION_PARAMETER_PACK_P (decl)
9786 && TREE_CHAIN (parm)
9787 && TREE_CHAIN (parm) != void_list_node)
9788 error ("parameter packs must be at the end of the parameter list");
9790 TREE_CHAIN (decl) = decls;
9792 result = tree_cons (init, type, result);
9794 decls = nreverse (decls);
9795 result = nreverse (result);
9797 result = chainon (result, void_list_node);
9804 /* D is a constructor or overloaded `operator='.
9806 Let T be the class in which D is declared. Then, this function
9809 -1 if D's is an ill-formed constructor or copy assignment operator
9810 whose first parameter is of type `T'.
9811 0 if D is not a copy constructor or copy assignment
9813 1 if D is a copy constructor or copy assignment operator whose
9814 first parameter is a reference to const qualified T.
9815 2 if D is a copy constructor or copy assignment operator whose
9816 first parameter is a reference to non-const qualified T.
9818 This function can be used as a predicate. Positive values indicate
9819 a copy constructor and nonzero values indicate a copy assignment
9823 copy_fn_p (const_tree d)
9829 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9831 if (TREE_CODE (d) == TEMPLATE_DECL
9832 || (DECL_TEMPLATE_INFO (d)
9833 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9834 /* Instantiations of template member functions are never copy
9835 functions. Note that member functions of templated classes are
9836 represented as template functions internally, and we must
9837 accept those as copy functions. */
9840 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9844 arg_type = TREE_VALUE (args);
9845 if (arg_type == error_mark_node)
9848 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9850 /* Pass by value copy assignment operator. */
9853 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9854 && !TYPE_REF_IS_RVALUE (arg_type)
9855 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9857 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9863 args = TREE_CHAIN (args);
9865 if (args && args != void_list_node && !TREE_PURPOSE (args))
9866 /* There are more non-optional args. */
9872 /* D is a constructor or overloaded `operator='.
9874 Let T be the class in which D is declared. Then, this function
9875 returns true when D is a move constructor or move assignment
9876 operator, false otherwise. */
9879 move_fn_p (const_tree d)
9883 bool result = false;
9885 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9887 if (cxx_dialect == cxx98)
9888 /* There are no move constructors if we are in C++98 mode. */
9891 if (TREE_CODE (d) == TEMPLATE_DECL
9892 || (DECL_TEMPLATE_INFO (d)
9893 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9894 /* Instantiations of template member functions are never copy
9895 functions. Note that member functions of templated classes are
9896 represented as template functions internally, and we must
9897 accept those as copy functions. */
9900 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9904 arg_type = TREE_VALUE (args);
9905 if (arg_type == error_mark_node)
9908 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9909 && TYPE_REF_IS_RVALUE (arg_type)
9910 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9914 args = TREE_CHAIN (args);
9916 if (args && args != void_list_node && !TREE_PURPOSE (args))
9917 /* There are more non-optional args. */
9923 /* Remember any special properties of member function DECL. */
9926 grok_special_member_properties (tree decl)
9930 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9933 class_type = DECL_CONTEXT (decl);
9934 if (DECL_CONSTRUCTOR_P (decl))
9936 int ctor = copy_fn_p (decl);
9938 if (!DECL_ARTIFICIAL (decl))
9939 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9945 A non-template constructor for class X is a copy
9946 constructor if its first parameter is of type X&, const
9947 X&, volatile X& or const volatile X&, and either there
9948 are no other parameters or else all other parameters have
9949 default arguments. */
9950 TYPE_HAS_INIT_REF (class_type) = 1;
9951 if (!DECL_DEFAULTED_FN (decl))
9952 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9954 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9956 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9958 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9959 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9960 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9962 else if (is_list_ctor (decl))
9963 TYPE_HAS_LIST_CTOR (class_type) = 1;
9965 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9969 A non-template assignment operator for class X is a copy
9970 assignment operator if its parameter is of type X, X&, const
9971 X&, volatile X& or const volatile X&. */
9973 int assop = copy_fn_p (decl);
9977 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9978 if (!DECL_DEFAULTED_FN (decl))
9979 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9981 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9986 /* Check a constructor DECL has the correct form. Complains
9987 if the class has a constructor of the form X(X). */
9990 grok_ctor_properties (const_tree ctype, const_tree decl)
9992 int ctor_parm = copy_fn_p (decl);
9998 A declaration of a constructor for a class X is ill-formed if
9999 its first parameter is of type (optionally cv-qualified) X
10000 and either there are no other parameters or else all other
10001 parameters have default arguments.
10003 We *don't* complain about member template instantiations that
10004 have this form, though; they can occur as we try to decide
10005 what constructor to use during overload resolution. Since
10006 overload resolution will never prefer such a constructor to
10007 the non-template copy constructor (which is either explicitly
10008 or implicitly defined), there's no need to worry about their
10009 existence. Theoretically, they should never even be
10010 instantiated, but that's hard to forestall. */
10011 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10019 /* An operator with this code is unary, but can also be binary. */
10022 ambi_op_p (enum tree_code code)
10024 return (code == INDIRECT_REF
10025 || code == ADDR_EXPR
10026 || code == UNARY_PLUS_EXPR
10027 || code == NEGATE_EXPR
10028 || code == PREINCREMENT_EXPR
10029 || code == PREDECREMENT_EXPR);
10032 /* An operator with this name can only be unary. */
10035 unary_op_p (enum tree_code code)
10037 return (code == TRUTH_NOT_EXPR
10038 || code == BIT_NOT_EXPR
10039 || code == COMPONENT_REF
10040 || code == TYPE_EXPR);
10043 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10044 errors are issued for invalid declarations. */
10047 grok_op_properties (tree decl, bool complain)
10049 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10051 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10052 tree name = DECL_NAME (decl);
10053 enum tree_code operator_code;
10058 /* Count the number of arguments and check for ellipsis. */
10059 for (argtype = argtypes, arity = 0;
10060 argtype && argtype != void_list_node;
10061 argtype = TREE_CHAIN (argtype))
10063 ellipsis_p = !argtype;
10065 class_type = DECL_CONTEXT (decl);
10066 if (class_type && !CLASS_TYPE_P (class_type))
10067 class_type = NULL_TREE;
10069 if (DECL_CONV_FN_P (decl))
10070 operator_code = TYPE_EXPR;
10074 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10075 if (ansi_opname (CODE) == name) \
10077 operator_code = (CODE); \
10080 else if (ansi_assopname (CODE) == name) \
10082 operator_code = (CODE); \
10083 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10087 #include "operators.def"
10088 #undef DEF_OPERATOR
10090 gcc_unreachable ();
10093 gcc_assert (operator_code != MAX_TREE_CODES);
10094 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10097 switch (operator_code)
10100 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10104 TYPE_GETS_DELETE (class_type) |= 1;
10108 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10111 case VEC_DELETE_EXPR:
10112 TYPE_GETS_DELETE (class_type) |= 2;
10119 /* [basic.std.dynamic.allocation]/1:
10121 A program is ill-formed if an allocation function is declared
10122 in a namespace scope other than global scope or declared static
10125 The same also holds true for deallocation functions. */
10126 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10127 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10129 if (DECL_NAMESPACE_SCOPE_P (decl))
10131 if (CP_DECL_CONTEXT (decl) != global_namespace)
10133 error ("%qD may not be declared within a namespace", decl);
10136 else if (!TREE_PUBLIC (decl))
10138 error ("%qD may not be declared as static", decl);
10144 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10146 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10147 DECL_IS_OPERATOR_NEW (decl) = 1;
10149 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10150 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10153 /* An operator function must either be a non-static member function
10154 or have at least one parameter of a class, a reference to a class,
10155 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10156 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10158 if (operator_code == TYPE_EXPR
10159 || operator_code == CALL_EXPR
10160 || operator_code == COMPONENT_REF
10161 || operator_code == ARRAY_REF
10162 || operator_code == NOP_EXPR)
10164 error ("%qD must be a nonstatic member function", decl);
10171 if (DECL_STATIC_FUNCTION_P (decl))
10173 error ("%qD must be either a non-static member "
10174 "function or a non-member function", decl);
10178 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10180 tree arg = non_reference (TREE_VALUE (p));
10181 if (arg == error_mark_node)
10184 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10185 because these checks are performed even on
10186 template functions. */
10187 if (MAYBE_CLASS_TYPE_P (arg)
10188 || TREE_CODE (arg) == ENUMERAL_TYPE)
10192 if (!p || p == void_list_node)
10195 error ("%qD must have an argument of class or "
10196 "enumerated type", decl);
10202 /* There are no restrictions on the arguments to an overloaded
10204 if (operator_code == CALL_EXPR)
10207 /* Warn about conversion operators that will never be used. */
10208 if (IDENTIFIER_TYPENAME_P (name)
10209 && ! DECL_TEMPLATE_INFO (decl)
10211 /* Warn only declaring the function; there is no need to
10212 warn again about out-of-class definitions. */
10213 && class_type == current_class_type)
10215 tree t = TREE_TYPE (name);
10216 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10217 const char *what = 0;
10220 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10222 if (TREE_CODE (t) == VOID_TYPE)
10224 else if (class_type)
10226 if (t == class_type)
10227 what = "the same type";
10228 /* Don't force t to be complete here. */
10229 else if (MAYBE_CLASS_TYPE_P (t)
10230 && COMPLETE_TYPE_P (t)
10231 && DERIVED_FROM_P (t, class_type))
10232 what = "a base class";
10236 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10237 "conversion operator",
10238 ref ? "a reference to " : "", what);
10241 if (operator_code == COND_EXPR)
10244 error ("ISO C++ prohibits overloading operator ?:");
10247 else if (ellipsis_p)
10249 error ("%qD must not have variable number of arguments", decl);
10252 else if (ambi_op_p (operator_code))
10255 /* We pick the one-argument operator codes by default, so
10256 we don't have to change anything. */
10258 else if (arity == 2)
10260 /* If we thought this was a unary operator, we now know
10261 it to be a binary operator. */
10262 switch (operator_code)
10265 operator_code = MULT_EXPR;
10269 operator_code = BIT_AND_EXPR;
10272 case UNARY_PLUS_EXPR:
10273 operator_code = PLUS_EXPR;
10277 operator_code = MINUS_EXPR;
10280 case PREINCREMENT_EXPR:
10281 operator_code = POSTINCREMENT_EXPR;
10284 case PREDECREMENT_EXPR:
10285 operator_code = POSTDECREMENT_EXPR;
10289 gcc_unreachable ();
10292 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10294 if ((operator_code == POSTINCREMENT_EXPR
10295 || operator_code == POSTDECREMENT_EXPR)
10296 && ! processing_template_decl
10297 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10300 error ("postfix %qD must take %<int%> as its argument",
10303 error ("postfix %qD must take %<int%> as its second "
10311 error ("%qD must take either zero or one argument", decl);
10313 error ("%qD must take either one or two arguments", decl);
10317 /* More Effective C++ rule 6. */
10319 && (operator_code == POSTINCREMENT_EXPR
10320 || operator_code == POSTDECREMENT_EXPR
10321 || operator_code == PREINCREMENT_EXPR
10322 || operator_code == PREDECREMENT_EXPR))
10324 tree arg = TREE_VALUE (argtypes);
10325 tree ret = TREE_TYPE (TREE_TYPE (decl));
10326 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10327 arg = TREE_TYPE (arg);
10328 arg = TYPE_MAIN_VARIANT (arg);
10329 if (operator_code == PREINCREMENT_EXPR
10330 || operator_code == PREDECREMENT_EXPR)
10332 if (TREE_CODE (ret) != REFERENCE_TYPE
10333 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10335 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10336 build_reference_type (arg));
10340 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10341 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10345 else if (unary_op_p (operator_code))
10350 error ("%qD must take %<void%>", decl);
10352 error ("%qD must take exactly one argument", decl);
10356 else /* if (binary_op_p (operator_code)) */
10361 error ("%qD must take exactly one argument", decl);
10363 error ("%qD must take exactly two arguments", decl);
10367 /* More Effective C++ rule 7. */
10369 && (operator_code == TRUTH_ANDIF_EXPR
10370 || operator_code == TRUTH_ORIF_EXPR
10371 || operator_code == COMPOUND_EXPR))
10372 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10376 /* Effective C++ rule 23. */
10379 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10380 && (operator_code == PLUS_EXPR
10381 || operator_code == MINUS_EXPR
10382 || operator_code == TRUNC_DIV_EXPR
10383 || operator_code == MULT_EXPR
10384 || operator_code == TRUNC_MOD_EXPR)
10385 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10386 warning (OPT_Weffc__, "%qD should return by value", decl);
10388 /* [over.oper]/8 */
10389 for (; argtypes && argtypes != void_list_node;
10390 argtypes = TREE_CHAIN (argtypes))
10391 if (TREE_PURPOSE (argtypes))
10393 TREE_PURPOSE (argtypes) = NULL_TREE;
10394 if (operator_code == POSTINCREMENT_EXPR
10395 || operator_code == POSTDECREMENT_EXPR)
10397 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10402 error ("%qD cannot have default arguments", decl);
10410 /* Return a string giving the keyword associate with CODE. */
10412 static const char *
10413 tag_name (enum tag_types code)
10425 case typename_type:
10428 gcc_unreachable ();
10432 /* Name lookup in an elaborated-type-specifier (after the keyword
10433 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10434 elaborated-type-specifier is invalid, issue a diagnostic and return
10435 error_mark_node; otherwise, return the *_TYPE to which it referred.
10436 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10439 check_elaborated_type_specifier (enum tag_types tag_code,
10441 bool allow_template_p)
10447 struct S { struct S *p; };
10449 name lookup will find the TYPE_DECL for the implicit "S::S"
10450 typedef. Adjust for that here. */
10451 if (DECL_SELF_REFERENCE_P (decl))
10452 decl = TYPE_NAME (TREE_TYPE (decl));
10454 type = TREE_TYPE (decl);
10456 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10457 is false for this case as well. */
10458 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10460 error ("using template type parameter %qT after %qs",
10461 type, tag_name (tag_code));
10462 return error_mark_node;
10466 If the identifier resolves to a typedef-name or a template
10467 type-parameter, the elaborated-type-specifier is ill-formed.
10469 In other words, the only legitimate declaration to use in the
10470 elaborated type specifier is the implicit typedef created when
10471 the type is declared. */
10472 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10473 && tag_code != typename_type)
10475 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10476 error ("%q+D has a previous declaration here", decl);
10477 return error_mark_node;
10479 else if (TREE_CODE (type) != RECORD_TYPE
10480 && TREE_CODE (type) != UNION_TYPE
10481 && tag_code != enum_type
10482 && tag_code != typename_type)
10484 error ("%qT referred to as %qs", type, tag_name (tag_code));
10485 error ("%q+T has a previous declaration here", type);
10486 return error_mark_node;
10488 else if (TREE_CODE (type) != ENUMERAL_TYPE
10489 && tag_code == enum_type)
10491 error ("%qT referred to as enum", type);
10492 error ("%q+T has a previous declaration here", type);
10493 return error_mark_node;
10495 else if (!allow_template_p
10496 && TREE_CODE (type) == RECORD_TYPE
10497 && CLASSTYPE_IS_TEMPLATE (type))
10499 /* If a class template appears as elaborated type specifier
10500 without a template header such as:
10502 template <class T> class C {};
10503 void f(class C); // No template header here
10505 then the required template argument is missing. */
10506 error ("template argument required for %<%s %T%>",
10507 tag_name (tag_code),
10508 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10509 return error_mark_node;
10515 /* Lookup NAME in elaborate type specifier in scope according to
10516 SCOPE and issue diagnostics if necessary.
10517 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10518 found, and ERROR_MARK_NODE for type error. */
10521 lookup_and_check_tag (enum tag_types tag_code, tree name,
10522 tag_scope scope, bool template_header_p)
10526 if (scope == ts_global)
10528 /* First try ordinary name lookup, ignoring hidden class name
10529 injected via friend declaration. */
10530 decl = lookup_name_prefer_type (name, 2);
10531 /* If that fails, the name will be placed in the smallest
10532 non-class, non-function-prototype scope according to 3.3.1/5.
10533 We may already have a hidden name declared as friend in this
10534 scope. So lookup again but not ignoring hidden names.
10535 If we find one, that name will be made visible rather than
10536 creating a new tag. */
10538 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10541 decl = lookup_type_scope (name, scope);
10543 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10544 decl = DECL_TEMPLATE_RESULT (decl);
10546 if (decl && TREE_CODE (decl) == TYPE_DECL)
10548 /* Look for invalid nested type:
10552 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10554 error ("%qD has the same name as the class in which it is "
10557 return error_mark_node;
10560 /* Two cases we need to consider when deciding if a class
10561 template is allowed as an elaborated type specifier:
10562 1. It is a self reference to its own class.
10563 2. It comes with a template header.
10567 template <class T> class C {
10568 class C *c1; // DECL_SELF_REFERENCE_P is true
10571 template <class U> class C; // template_header_p is true
10572 template <class T> class C<T>::D {
10573 class C *c2; // DECL_SELF_REFERENCE_P is true
10576 t = check_elaborated_type_specifier (tag_code,
10579 | DECL_SELF_REFERENCE_P (decl));
10582 else if (decl && TREE_CODE (decl) == TREE_LIST)
10584 error ("reference to %qD is ambiguous", name);
10585 print_candidates (decl);
10586 return error_mark_node;
10592 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10593 Define the tag as a forward-reference if it is not defined.
10595 If a declaration is given, process it here, and report an error if
10596 multiple declarations are not identical.
10598 SCOPE is TS_CURRENT when this is also a definition. Only look in
10599 the current frame for the name (since C++ allows new names in any
10600 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10601 declaration. Only look beginning from the current scope outward up
10602 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10604 TEMPLATE_HEADER_P is true when this declaration is preceded by
10605 a set of template parameters. */
10608 xref_tag (enum tag_types tag_code, tree name,
10609 tag_scope scope, bool template_header_p)
10611 enum tree_code code;
10613 tree context = NULL_TREE;
10615 timevar_push (TV_NAME_LOOKUP);
10617 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10623 code = RECORD_TYPE;
10629 code = ENUMERAL_TYPE;
10632 gcc_unreachable ();
10635 /* In case of anonymous name, xref_tag is only called to
10636 make type node and push name. Name lookup is not required. */
10637 if (ANON_AGGRNAME_P (name))
10640 t = lookup_and_check_tag (tag_code, name,
10641 scope, template_header_p);
10643 if (t == error_mark_node)
10644 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10646 if (scope != ts_current && t && current_class_type
10647 && template_class_depth (current_class_type)
10648 && template_header_p)
10650 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10651 definition of this tag. Since, in addition, we are currently
10652 processing a (member) template declaration of a template
10653 class, we must be very careful; consider:
10660 { template <class V>
10661 friend struct S1; };
10663 Here, the S2::S1 declaration should not be confused with the
10664 outer declaration. In particular, the inner version should
10665 have a template parameter of level 2, not level 1. This
10666 would be particularly important if the member declaration
10669 template <class V = U> friend struct S1;
10671 say, when we should tsubst into `U' when instantiating
10672 S2. On the other hand, when presented with:
10682 we must find the inner binding eventually. We
10683 accomplish this by making sure that the new type we
10684 create to represent this declaration has the right
10686 context = TYPE_CONTEXT (t);
10692 /* If no such tag is yet defined, create a forward-reference node
10693 and record it as the "definition".
10694 When a real declaration of this type is found,
10695 the forward-reference will be altered into a real type. */
10696 if (code == ENUMERAL_TYPE)
10698 error ("use of enum %q#D without previous declaration", name);
10699 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10703 t = make_class_type (code);
10704 TYPE_CONTEXT (t) = context;
10705 t = pushtag (name, t, scope);
10710 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10712 if (!redeclare_class_template (t, current_template_parms))
10713 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10715 else if (!processing_template_decl
10716 && CLASS_TYPE_P (t)
10717 && CLASSTYPE_IS_TEMPLATE (t))
10719 error ("redeclaration of %qT as a non-template", t);
10720 error ("previous declaration %q+D", t);
10721 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10724 /* Make injected friend class visible. */
10725 if (scope != ts_within_enclosing_non_class
10726 && hidden_name_p (TYPE_NAME (t)))
10728 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10729 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10731 if (TYPE_TEMPLATE_INFO (t))
10733 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10734 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10739 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10743 xref_tag_from_type (tree old, tree id, tag_scope scope)
10745 enum tag_types tag_kind;
10747 if (TREE_CODE (old) == RECORD_TYPE)
10748 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10750 tag_kind = union_type;
10752 if (id == NULL_TREE)
10753 id = TYPE_IDENTIFIER (old);
10755 return xref_tag (tag_kind, id, scope, false);
10758 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10759 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10760 access_* node, and the TREE_VALUE is the type of the base-class.
10761 Non-NULL TREE_TYPE indicates virtual inheritance.
10763 Returns true if the binfo hierarchy was successfully created,
10764 false if an error was detected. */
10767 xref_basetypes (tree ref, tree base_list)
10770 tree binfo, base_binfo;
10771 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10772 unsigned max_bases = 0; /* Maximum direct bases. */
10774 tree default_access;
10775 tree igo_prev; /* Track Inheritance Graph Order. */
10777 if (ref == error_mark_node)
10780 /* The base of a derived class is private by default, all others are
10782 default_access = (TREE_CODE (ref) == RECORD_TYPE
10783 && CLASSTYPE_DECLARED_CLASS (ref)
10784 ? access_private_node : access_public_node);
10786 /* First, make sure that any templates in base-classes are
10787 instantiated. This ensures that if we call ourselves recursively
10788 we do not get confused about which classes are marked and which
10790 basep = &base_list;
10793 tree basetype = TREE_VALUE (*basep);
10795 if (!(processing_template_decl && uses_template_parms (basetype))
10796 && !complete_type_or_else (basetype, NULL))
10797 /* An incomplete type. Remove it from the list. */
10798 *basep = TREE_CHAIN (*basep);
10802 if (TREE_TYPE (*basep))
10804 if (CLASS_TYPE_P (basetype))
10805 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10806 basep = &TREE_CHAIN (*basep);
10810 TYPE_MARKED_P (ref) = 1;
10812 /* The binfo slot should be empty, unless this is an (ill-formed)
10814 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10815 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10817 binfo = make_tree_binfo (max_bases);
10819 TYPE_BINFO (ref) = binfo;
10820 BINFO_OFFSET (binfo) = size_zero_node;
10821 BINFO_TYPE (binfo) = ref;
10823 /* Apply base-class info set up to the variants of this type. */
10824 fixup_type_variants (ref);
10828 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10829 /* An aggregate cannot have baseclasses. */
10830 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10832 if (TREE_CODE (ref) == UNION_TYPE)
10834 error ("derived union %qT invalid", ref);
10841 if (TYPE_FOR_JAVA (ref))
10843 error ("Java class %qT cannot have multiple bases", ref);
10850 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10852 if (TYPE_FOR_JAVA (ref))
10854 error ("Java class %qT cannot have virtual bases", ref);
10859 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10861 tree access = TREE_PURPOSE (base_list);
10862 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10863 tree basetype = TREE_VALUE (base_list);
10865 if (access == access_default_node)
10866 access = default_access;
10868 if (PACK_EXPANSION_P (basetype))
10869 basetype = PACK_EXPANSION_PATTERN (basetype);
10870 if (TREE_CODE (basetype) == TYPE_DECL)
10871 basetype = TREE_TYPE (basetype);
10872 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10874 error ("base type %qT fails to be a struct or class type",
10879 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10880 TYPE_FOR_JAVA (ref) = 1;
10882 base_binfo = NULL_TREE;
10883 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10885 base_binfo = TYPE_BINFO (basetype);
10886 /* The original basetype could have been a typedef'd type. */
10887 basetype = BINFO_TYPE (base_binfo);
10889 /* Inherit flags from the base. */
10890 TYPE_HAS_NEW_OPERATOR (ref)
10891 |= TYPE_HAS_NEW_OPERATOR (basetype);
10892 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10893 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10894 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10895 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10896 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10897 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10898 CLASSTYPE_REPEATED_BASE_P (ref)
10899 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10902 /* We must do this test after we've seen through a typedef
10904 if (TYPE_MARKED_P (basetype))
10906 if (basetype == ref)
10907 error ("recursive type %qT undefined", basetype);
10909 error ("duplicate base type %qT invalid", basetype);
10913 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10914 /* Regenerate the pack expansion for the bases. */
10915 basetype = make_pack_expansion (basetype);
10917 TYPE_MARKED_P (basetype) = 1;
10919 base_binfo = copy_binfo (base_binfo, basetype, ref,
10920 &igo_prev, via_virtual);
10921 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10922 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10924 BINFO_BASE_APPEND (binfo, base_binfo);
10925 BINFO_BASE_ACCESS_APPEND (binfo, access);
10928 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10929 /* If we have space in the vbase vector, we must have shared at
10930 least one of them, and are therefore diamond shaped. */
10931 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10933 /* Unmark all the types. */
10934 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10935 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10936 TYPE_MARKED_P (ref) = 0;
10938 /* Now see if we have a repeated base type. */
10939 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10941 for (base_binfo = binfo; base_binfo;
10942 base_binfo = TREE_CHAIN (base_binfo))
10944 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10946 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10949 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10951 for (base_binfo = binfo; base_binfo;
10952 base_binfo = TREE_CHAIN (base_binfo))
10953 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10954 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10963 /* Begin compiling the definition of an enumeration type.
10966 UNDERLYING_TYPE is the type that will be used as the storage for
10967 the enumeration type. This should be NULL_TREE if no storage type
10970 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10972 Returns the type object, as yet incomplete.
10973 Also records info about it so that build_enumerator
10974 may be used to declare the individual values as they are read. */
10977 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10981 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10983 /* If this is the real definition for a previous forward reference,
10984 fill in the contents in the same object that used to be the
10985 forward reference. */
10987 enumtype = lookup_and_check_tag (enum_type, name,
10988 /*tag_scope=*/ts_current,
10989 /*template_header_p=*/false);
10991 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10993 error ("multiple definition of %q#T", enumtype);
10994 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10995 /* Clear out TYPE_VALUES, and start again. */
10996 TYPE_VALUES (enumtype) = NULL_TREE;
11000 /* In case of error, make a dummy enum to allow parsing to
11002 if (enumtype == error_mark_node)
11003 name = make_anon_name ();
11005 enumtype = make_node (ENUMERAL_TYPE);
11006 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11009 if (enumtype == error_mark_node)
11014 SET_SCOPED_ENUM_P (enumtype, 1);
11015 begin_scope (sk_scoped_enum, enumtype);
11017 /* [C++0x dcl.enum]p5:
11019 If not explicitly specified, the underlying type of a scoped
11020 enumeration type is int. */
11021 if (!underlying_type)
11022 underlying_type = integer_type_node;
11025 if (underlying_type)
11027 if (CP_INTEGRAL_TYPE_P (underlying_type))
11029 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11030 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11031 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11032 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11033 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11034 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11035 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11036 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11037 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11038 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11041 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11042 underlying_type, enumtype);
11048 /* After processing and defining all the values of an enumeration type,
11049 install their decls in the enumeration type and finish it off.
11050 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11053 finish_enum (tree enumtype)
11062 bool use_short_enum;
11067 tree underlying_type = NULL_TREE;
11068 bool fixed_underlying_type_p
11069 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11071 /* We built up the VALUES in reverse order. */
11072 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11074 /* For an enum defined in a template, just set the type of the values;
11075 all further processing is postponed until the template is
11076 instantiated. We need to set the type so that tsubst of a CONST_DECL
11078 if (processing_template_decl)
11080 for (values = TYPE_VALUES (enumtype);
11082 values = TREE_CHAIN (values))
11083 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11084 if (at_function_scope_p ())
11085 add_stmt (build_min (TAG_DEFN, enumtype));
11089 /* Determine the minimum and maximum values of the enumerators. */
11090 if (TYPE_VALUES (enumtype))
11092 minnode = maxnode = NULL_TREE;
11094 for (values = TYPE_VALUES (enumtype);
11096 values = TREE_CHAIN (values))
11098 decl = TREE_VALUE (values);
11100 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11101 each enumerator has the type of its enumeration. Prior to the
11102 closing brace, the type of each enumerator is the type of its
11103 initializing value. */
11104 TREE_TYPE (decl) = enumtype;
11106 /* Update the minimum and maximum values, if appropriate. */
11107 value = DECL_INITIAL (decl);
11108 if (value == error_mark_node)
11109 value = integer_zero_node;
11110 /* Figure out what the minimum and maximum values of the
11111 enumerators are. */
11113 minnode = maxnode = value;
11114 else if (tree_int_cst_lt (maxnode, value))
11116 else if (tree_int_cst_lt (value, minnode))
11123 If the enumerator-list is empty, the underlying type is as if
11124 the enumeration had a single enumerator with value 0. */
11125 minnode = maxnode = integer_zero_node;
11127 /* Compute the number of bits require to represent all values of the
11128 enumeration. We must do this before the type of MINNODE and
11129 MAXNODE are transformed, since tree_int_cst_min_precision relies
11130 on the TREE_TYPE of the value it is passed. */
11131 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11132 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11133 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11134 precision = MAX (lowprec, highprec);
11136 if (!fixed_underlying_type_p)
11138 /* Determine the underlying type of the enumeration.
11142 The underlying type of an enumeration is an integral type that
11143 can represent all the enumerator values defined in the
11144 enumeration. It is implementation-defined which integral type is
11145 used as the underlying type for an enumeration except that the
11146 underlying type shall not be larger than int unless the value of
11147 an enumerator cannot fit in an int or unsigned int.
11149 We use "int" or an "unsigned int" as the underlying type, even if
11150 a smaller integral type would work, unless the user has
11151 explicitly requested that we use the smallest possible type. The
11152 user can request that for all enumerations with a command line
11153 flag, or for just one enumeration with an attribute. */
11155 use_short_enum = flag_short_enums
11156 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11158 for (itk = (use_short_enum ? itk_char : itk_int);
11162 underlying_type = integer_types[itk];
11163 if (TYPE_PRECISION (underlying_type) >= precision
11164 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11167 if (itk == itk_none)
11171 IF no integral type can represent all the enumerator values, the
11172 enumeration is ill-formed. */
11173 error ("no integral type can represent all of the enumerator values "
11174 "for %qT", enumtype);
11175 precision = TYPE_PRECISION (long_long_integer_type_node);
11176 underlying_type = integer_types[itk_unsigned_long_long];
11181 The value of sizeof() applied to an enumeration type, an object
11182 of an enumeration type, or an enumerator, is the value of sizeof()
11183 applied to the underlying type. */
11184 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11185 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11186 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11187 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11188 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11189 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11191 /* Set the underlying type of the enumeration type to the
11192 computed enumeration type, restricted to the enumerator
11194 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11195 set_min_and_max_values_for_integral_type
11196 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11199 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11201 /* Compute the minimum and maximum values for the type.
11205 For an enumeration where emin is the smallest enumerator and emax
11206 is the largest, the values of the enumeration are the values of the
11207 underlying type in the range bmin to bmax, where bmin and bmax are,
11208 respectively, the smallest and largest values of the smallest bit-
11209 field that can store emin and emax. */
11211 /* The middle-end currently assumes that types with TYPE_PRECISION
11212 narrower than their underlying type are suitably zero or sign
11213 extended to fill their mode. g++ doesn't make these guarantees.
11214 Until the middle-end can represent such paradoxical types, we
11215 set the TYPE_PRECISION to the width of the underlying type. */
11216 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11218 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11220 /* Convert each of the enumerators to the type of the underlying
11221 type of the enumeration. */
11222 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11224 location_t saved_location;
11226 decl = TREE_VALUE (values);
11227 saved_location = input_location;
11228 input_location = DECL_SOURCE_LOCATION (decl);
11229 if (fixed_underlying_type_p)
11230 /* If the enumeration type has a fixed underlying type, we
11231 already checked all of the enumerator values. */
11232 value = DECL_INITIAL (decl);
11234 value = perform_implicit_conversion (underlying_type,
11235 DECL_INITIAL (decl),
11236 tf_warning_or_error);
11237 input_location = saved_location;
11239 /* Do not clobber shared ints. */
11240 value = copy_node (value);
11242 TREE_TYPE (value) = enumtype;
11243 DECL_INITIAL (decl) = value;
11246 /* Fix up all variant types of this enum type. */
11247 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11249 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11250 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11251 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11252 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11253 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11254 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11255 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11256 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11257 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11258 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11259 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11262 /* Finish up the scope of a scoped enumeration. */
11263 if (SCOPED_ENUM_P (enumtype))
11266 /* Finish debugging output for this type. */
11267 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11270 /* Build and install a CONST_DECL for an enumeration constant of the
11271 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11272 Assignment of sequential values by default is handled here. */
11275 build_enumerator (tree name, tree value, tree enumtype)
11281 /* If the VALUE was erroneous, pretend it wasn't there; that will
11282 result in the enum being assigned the next value in sequence. */
11283 if (value == error_mark_node)
11286 /* Remove no-op casts from the value. */
11288 STRIP_TYPE_NOPS (value);
11290 if (! processing_template_decl)
11292 /* Validate and default VALUE. */
11293 if (value != NULL_TREE)
11295 value = integral_constant_value (value);
11297 if (TREE_CODE (value) == INTEGER_CST)
11299 value = perform_integral_promotions (value);
11300 constant_expression_warning (value);
11304 error ("enumerator value for %qD is not an integer constant", name);
11309 /* Default based on previous value. */
11310 if (value == NULL_TREE)
11312 if (TYPE_VALUES (enumtype))
11315 unsigned HOST_WIDE_INT lo;
11319 /* The next value is the previous value plus one.
11320 add_double doesn't know the type of the target expression,
11321 so we must check with int_fits_type_p as well. */
11322 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11323 if (error_operand_p (prev_value))
11324 value = error_mark_node;
11327 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11328 TREE_INT_CST_HIGH (prev_value),
11330 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11332 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11336 error ("overflow in enumeration values at %qD", name);
11337 value = error_mark_node;
11342 value = integer_zero_node;
11345 /* Remove no-op casts from the value. */
11346 STRIP_TYPE_NOPS (value);
11348 /* If the underlying type of the enum is fixed, check whether
11349 the enumerator values fits in the underlying type. If it
11350 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11351 if (ENUM_UNDERLYING_TYPE (enumtype)
11353 && TREE_CODE (value) == INTEGER_CST
11354 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11356 error ("enumerator value %E is too large for underlying type %<%T%>",
11357 value, ENUM_UNDERLYING_TYPE (enumtype));
11359 /* Silently convert the value so that we can continue. */
11360 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11365 /* C++ associates enums with global, function, or class declarations. */
11366 context = current_scope ();
11368 /* Build the actual enumeration constant. Note that the enumeration
11369 constants have the underlying type of the enum (if it is fixed)
11370 or the type of their initializer (if the underlying type of the
11371 enum is not fixed):
11375 If the underlying type is fixed, the type of each enumerator
11376 prior to the closing brace is the underlying type; if the
11377 initializing value of an enumerator cannot be represented by
11378 the underlying type, the program is ill-formed. If the
11379 underlying type is not fixed, the type of each enumerator is
11380 the type of its initializing value.
11382 If the underlying type is not fixed, it will be computed by
11383 finish_enum and we will reset the type of this enumerator. Of
11384 course, if we're processing a template, there may be no value. */
11385 type = value ? TREE_TYPE (value) : NULL_TREE;
11387 if (context && context == current_class_type)
11388 /* This enum declaration is local to the class. We need the full
11389 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11390 decl = build_lang_decl (CONST_DECL, name, type);
11392 /* It's a global enum, or it's local to a function. (Note local to
11393 a function could mean local to a class method. */
11394 decl = build_decl (input_location, CONST_DECL, name, type);
11396 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11397 TREE_CONSTANT (decl) = 1;
11398 TREE_READONLY (decl) = 1;
11399 DECL_INITIAL (decl) = value;
11401 if (context && context == current_class_type)
11402 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11403 on the TYPE_FIELDS list for `S'. (That's so that you can say
11404 things like `S::i' later.) */
11405 finish_member_declaration (decl);
11409 /* Add this enumeration constant to the list for this type. */
11410 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11413 /* Look for an enumerator with the given NAME within the enumeration
11414 type ENUMTYPE. This routine is used primarily for qualified name
11415 lookup into an enumerator in C++0x, e.g.,
11417 enum class Color { Red, Green, Blue };
11419 Color color = Color::Red;
11421 Returns the value corresponding to the enumerator, or
11422 NULL_TREE if no such enumerator was found. */
11424 lookup_enumerator (tree enumtype, tree name)
11427 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11429 e = purpose_member (name, TYPE_VALUES (enumtype));
11430 return e? TREE_VALUE (e) : NULL_TREE;
11434 /* We're defining DECL. Make sure that it's type is OK. */
11437 check_function_type (tree decl, tree current_function_parms)
11439 tree fntype = TREE_TYPE (decl);
11440 tree return_type = complete_type (TREE_TYPE (fntype));
11442 /* In a function definition, arg types must be complete. */
11443 require_complete_types_for_parms (current_function_parms);
11445 if (dependent_type_p (return_type))
11447 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11448 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11450 tree args = TYPE_ARG_TYPES (fntype);
11452 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11453 error ("return type %q#T is incomplete", return_type);
11455 error ("return type has Java class type %q#T", return_type);
11457 /* Make it return void instead. */
11458 if (TREE_CODE (fntype) == METHOD_TYPE)
11459 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11461 TREE_CHAIN (args));
11463 fntype = build_function_type (void_type_node, args);
11465 = build_exception_variant (fntype,
11466 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11469 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11472 /* Create the FUNCTION_DECL for a function definition.
11473 DECLSPECS and DECLARATOR are the parts of the declaration;
11474 they describe the function's name and the type it returns,
11475 but twisted together in a fashion that parallels the syntax of C.
11477 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11478 DECLARATOR is really the DECL for the function we are about to
11479 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11480 indicating that the function is an inline defined in-class.
11482 This function creates a binding context for the function body
11483 as well as setting up the FUNCTION_DECL in current_function_decl.
11485 For C++, we must first check whether that datum makes any sense.
11486 For example, "class A local_a(1,2);" means that variable local_a
11487 is an aggregate of type A, which should have a constructor
11488 applied to it with the argument list [1, 2].
11490 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11491 or may be a BLOCK if the function has been defined previously
11492 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11493 error_mark_node if the function has never been defined, or
11494 a BLOCK if the function has been defined somewhere. */
11497 start_preparsed_function (tree decl1, tree attrs, int flags)
11499 tree ctype = NULL_TREE;
11502 int doing_friend = 0;
11503 struct cp_binding_level *bl;
11504 tree current_function_parms;
11505 struct c_fileinfo *finfo
11506 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11507 bool honor_interface;
11509 /* Sanity check. */
11510 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11511 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11513 fntype = TREE_TYPE (decl1);
11514 if (TREE_CODE (fntype) == METHOD_TYPE)
11515 ctype = TYPE_METHOD_BASETYPE (fntype);
11517 /* ISO C++ 11.4/5. A friend function defined in a class is in
11518 the (lexical) scope of the class in which it is defined. */
11519 if (!ctype && DECL_FRIEND_P (decl1))
11521 ctype = DECL_FRIEND_CONTEXT (decl1);
11523 /* CTYPE could be null here if we're dealing with a template;
11524 for example, `inline friend float foo()' inside a template
11525 will have no CTYPE set. */
11526 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11532 if (DECL_DECLARED_INLINE_P (decl1)
11533 && lookup_attribute ("noinline", attrs))
11534 warning (0, "inline function %q+D given attribute noinline", decl1);
11536 /* Handle gnu_inline attribute. */
11537 if (GNU_INLINE_P (decl1))
11539 DECL_EXTERNAL (decl1) = 1;
11540 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11541 DECL_INTERFACE_KNOWN (decl1) = 1;
11542 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11545 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11546 /* This is a constructor, we must ensure that any default args
11547 introduced by this definition are propagated to the clones
11548 now. The clones are used directly in overload resolution. */
11549 adjust_clone_args (decl1);
11551 /* Sometimes we don't notice that a function is a static member, and
11552 build a METHOD_TYPE for it. Fix that up now. */
11553 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11554 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11556 revert_static_member_fn (decl1);
11560 /* Set up current_class_type, and enter the scope of the class, if
11563 push_nested_class (ctype);
11564 else if (DECL_STATIC_FUNCTION_P (decl1))
11565 push_nested_class (DECL_CONTEXT (decl1));
11567 /* Now that we have entered the scope of the class, we must restore
11568 the bindings for any template parameters surrounding DECL1, if it
11569 is an inline member template. (Order is important; consider the
11570 case where a template parameter has the same name as a field of
11571 the class.) It is not until after this point that
11572 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11573 if (flags & SF_INCLASS_INLINE)
11574 maybe_begin_member_template_processing (decl1);
11576 /* Effective C++ rule 15. */
11578 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11579 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11580 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11582 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11583 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11584 if (!DECL_INITIAL (decl1))
11585 DECL_INITIAL (decl1) = error_mark_node;
11587 /* This function exists in static storage.
11588 (This does not mean `static' in the C sense!) */
11589 TREE_STATIC (decl1) = 1;
11591 /* We must call push_template_decl after current_class_type is set
11592 up. (If we are processing inline definitions after exiting a
11593 class scope, current_class_type will be NULL_TREE until set above
11594 by push_nested_class.) */
11595 if (processing_template_decl)
11597 /* FIXME: Handle error_mark_node more gracefully. */
11598 tree newdecl1 = push_template_decl (decl1);
11599 if (newdecl1 != error_mark_node)
11603 /* We are now in the scope of the function being defined. */
11604 current_function_decl = decl1;
11606 /* Save the parm names or decls from this function's declarator
11607 where store_parm_decls will find them. */
11608 current_function_parms = DECL_ARGUMENTS (decl1);
11610 /* Make sure the parameter and return types are reasonable. When
11611 you declare a function, these types can be incomplete, but they
11612 must be complete when you define the function. */
11613 check_function_type (decl1, current_function_parms);
11615 /* Build the return declaration for the function. */
11616 restype = TREE_TYPE (fntype);
11617 if (DECL_RESULT (decl1) == NULL_TREE)
11621 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11622 DECL_ARTIFICIAL (resdecl) = 1;
11623 DECL_IGNORED_P (resdecl) = 1;
11624 DECL_RESULT (decl1) = resdecl;
11626 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11629 /* Let the user know we're compiling this function. */
11630 announce_function (decl1);
11632 /* Record the decl so that the function name is defined.
11633 If we already have a decl for this name, and it is a FUNCTION_DECL,
11634 use the old decl. */
11635 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11637 /* A specialization is not used to guide overload resolution. */
11638 if (!DECL_FUNCTION_MEMBER_P (decl1)
11639 && !(DECL_USE_TEMPLATE (decl1) &&
11640 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11642 tree olddecl = pushdecl (decl1);
11644 if (olddecl == error_mark_node)
11645 /* If something went wrong when registering the declaration,
11646 use DECL1; we have to have a FUNCTION_DECL to use when
11647 parsing the body of the function. */
11651 /* Otherwise, OLDDECL is either a previous declaration
11652 of the same function or DECL1 itself. */
11654 if (warn_missing_declarations
11655 && olddecl == decl1
11656 && !DECL_MAIN_P (decl1)
11657 && TREE_PUBLIC (decl1)
11658 && !DECL_DECLARED_INLINE_P (decl1))
11662 /* Check whether DECL1 is in an anonymous
11664 for (context = DECL_CONTEXT (decl1);
11666 context = DECL_CONTEXT (context))
11668 if (TREE_CODE (context) == NAMESPACE_DECL
11669 && DECL_NAME (context) == NULL_TREE)
11673 if (context == NULL)
11674 warning (OPT_Wmissing_declarations,
11675 "no previous declaration for %q+D", decl1);
11683 /* We need to set the DECL_CONTEXT. */
11684 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11685 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11687 fntype = TREE_TYPE (decl1);
11689 /* If #pragma weak applies, mark the decl appropriately now.
11690 The pragma only applies to global functions. Because
11691 determining whether or not the #pragma applies involves
11692 computing the mangled name for the declaration, we cannot
11693 apply the pragma until after we have merged this declaration
11694 with any previous declarations; if the original declaration
11695 has a linkage specification, that specification applies to
11696 the definition as well, and may affect the mangled name. */
11697 if (!DECL_CONTEXT (decl1))
11698 maybe_apply_pragma_weak (decl1);
11701 /* Reset this in case the call to pushdecl changed it. */
11702 current_function_decl = decl1;
11704 gcc_assert (DECL_INITIAL (decl1));
11706 /* This function may already have been parsed, in which case just
11707 return; our caller will skip over the body without parsing. */
11708 if (DECL_INITIAL (decl1) != error_mark_node)
11711 /* Initialize RTL machinery. We cannot do this until
11712 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11713 even when processing a template; this is how we get
11714 CFUN set up, and our per-function variables initialized.
11715 FIXME factor out the non-RTL stuff. */
11716 bl = current_binding_level;
11717 allocate_struct_function (decl1, processing_template_decl);
11719 /* Initialize the language data structures. Whenever we start
11720 a new function, we destroy temporaries in the usual way. */
11721 cfun->language = GGC_CNEW (struct language_function);
11722 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11723 current_binding_level = bl;
11725 /* Even though we're inside a function body, we still don't want to
11726 call expand_expr to calculate the size of a variable-sized array.
11727 We haven't necessarily assigned RTL to all variables yet, so it's
11728 not safe to try to expand expressions involving them. */
11729 cfun->dont_save_pending_sizes_p = 1;
11731 /* Start the statement-tree, start the tree now. */
11732 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11734 /* If we are (erroneously) defining a function that we have already
11735 defined before, wipe out what we knew before. */
11736 if (!DECL_PENDING_INLINE_P (decl1))
11737 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11739 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11741 /* We know that this was set up by `grokclassfn'. We do not
11742 wait until `store_parm_decls', since evil parse errors may
11743 never get us to that point. Here we keep the consistency
11744 between `current_class_type' and `current_class_ptr'. */
11745 tree t = DECL_ARGUMENTS (decl1);
11747 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11748 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11750 cp_function_chain->x_current_class_ref
11751 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11752 cp_function_chain->x_current_class_ptr = t;
11754 /* Constructors and destructors need to know whether they're "in
11755 charge" of initializing virtual base classes. */
11756 t = TREE_CHAIN (t);
11757 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11759 current_in_charge_parm = t;
11760 t = TREE_CHAIN (t);
11762 if (DECL_HAS_VTT_PARM_P (decl1))
11764 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11765 current_vtt_parm = t;
11769 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11770 /* Implicitly-defined methods (like the
11771 destructor for a class in which no destructor
11772 is explicitly declared) must not be defined
11773 until their definition is needed. So, we
11774 ignore interface specifications for
11775 compiler-generated functions. */
11776 && !DECL_ARTIFICIAL (decl1));
11778 if (DECL_INTERFACE_KNOWN (decl1))
11780 tree ctx = decl_function_context (decl1);
11782 if (DECL_NOT_REALLY_EXTERN (decl1))
11783 DECL_EXTERNAL (decl1) = 0;
11785 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11786 && TREE_PUBLIC (ctx))
11787 /* This is a function in a local class in an extern inline
11789 comdat_linkage (decl1);
11791 /* If this function belongs to an interface, it is public.
11792 If it belongs to someone else's interface, it is also external.
11793 This only affects inlines and template instantiations. */
11794 else if (!finfo->interface_unknown && honor_interface)
11796 if (DECL_DECLARED_INLINE_P (decl1)
11797 || DECL_TEMPLATE_INSTANTIATION (decl1)
11798 || processing_template_decl)
11800 DECL_EXTERNAL (decl1)
11801 = (finfo->interface_only
11802 || (DECL_DECLARED_INLINE_P (decl1)
11803 && ! flag_implement_inlines
11804 && !DECL_VINDEX (decl1)));
11806 /* For WIN32 we also want to put these in linkonce sections. */
11807 maybe_make_one_only (decl1);
11810 DECL_EXTERNAL (decl1) = 0;
11811 DECL_INTERFACE_KNOWN (decl1) = 1;
11812 /* If this function is in an interface implemented in this file,
11813 make sure that the back end knows to emit this function
11815 if (!DECL_EXTERNAL (decl1))
11816 mark_needed (decl1);
11818 else if (finfo->interface_unknown && finfo->interface_only
11819 && honor_interface)
11821 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11822 interface, we will have both finfo->interface_unknown and
11823 finfo->interface_only set. In that case, we don't want to
11824 use the normal heuristics because someone will supply a
11825 #pragma implementation elsewhere, and deducing it here would
11826 produce a conflict. */
11827 comdat_linkage (decl1);
11828 DECL_EXTERNAL (decl1) = 0;
11829 DECL_INTERFACE_KNOWN (decl1) = 1;
11830 DECL_DEFER_OUTPUT (decl1) = 1;
11834 /* This is a definition, not a reference.
11835 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11836 if (!GNU_INLINE_P (decl1))
11837 DECL_EXTERNAL (decl1) = 0;
11839 if ((DECL_DECLARED_INLINE_P (decl1)
11840 || DECL_TEMPLATE_INSTANTIATION (decl1))
11841 && ! DECL_INTERFACE_KNOWN (decl1)
11842 /* Don't try to defer nested functions for now. */
11843 && ! decl_function_context (decl1))
11844 DECL_DEFER_OUTPUT (decl1) = 1;
11846 DECL_INTERFACE_KNOWN (decl1) = 1;
11849 /* Determine the ELF visibility attribute for the function. We must not
11850 do this before calling "pushdecl", as we must allow "duplicate_decls"
11851 to merge any attributes appropriately. We also need to wait until
11853 if (!DECL_CLONED_FUNCTION_P (decl1))
11854 determine_visibility (decl1);
11856 begin_scope (sk_function_parms, decl1);
11860 if (DECL_DESTRUCTOR_P (decl1)
11861 || (DECL_CONSTRUCTOR_P (decl1)
11862 && targetm.cxx.cdtor_returns_this ()))
11864 cdtor_label = build_decl (input_location,
11865 LABEL_DECL, NULL_TREE, NULL_TREE);
11866 DECL_CONTEXT (cdtor_label) = current_function_decl;
11869 start_fname_decls ();
11871 store_parm_decls (current_function_parms);
11875 /* Like start_preparsed_function, except that instead of a
11876 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11878 Returns 1 on success. If the DECLARATOR is not suitable for a function
11879 (it defines a datum instead), we return 0, which tells
11880 yyparse to report a parse error. */
11883 start_function (cp_decl_specifier_seq *declspecs,
11884 const cp_declarator *declarator,
11889 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11890 if (decl1 == error_mark_node)
11892 /* If the declarator is not suitable for a function definition,
11893 cause a syntax error. */
11894 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11896 error ("invalid function declaration");
11900 if (DECL_MAIN_P (decl1))
11901 /* main must return int. grokfndecl should have corrected it
11902 (and issued a diagnostic) if the user got it wrong. */
11903 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11904 integer_type_node));
11906 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11911 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11915 use_eh_spec_block (tree fn)
11917 return (flag_exceptions && flag_enforce_eh_specs
11918 && !processing_template_decl
11919 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11920 /* We insert the EH_SPEC_BLOCK only in the original
11921 function; then, it is copied automatically to the
11923 && !DECL_CLONED_FUNCTION_P (fn)
11924 /* Implicitly-generated constructors and destructors have
11925 exception specifications. However, those specifications
11926 are the union of the possible exceptions specified by the
11927 constructors/destructors for bases and members, so no
11928 unallowed exception will ever reach this function. By
11929 not creating the EH_SPEC_BLOCK we save a little memory,
11930 and we avoid spurious warnings about unreachable
11932 && !DECL_ARTIFICIAL (fn));
11935 /* Store the parameter declarations into the current function declaration.
11936 This is called after parsing the parameter declarations, before
11937 digesting the body of the function.
11939 Also install to binding contour return value identifier, if any. */
11942 store_parm_decls (tree current_function_parms)
11944 tree fndecl = current_function_decl;
11947 /* This is a chain of any other decls that came in among the parm
11948 declarations. If a parm is declared with enum {foo, bar} x;
11949 then CONST_DECLs for foo and bar are put here. */
11950 tree nonparms = NULL_TREE;
11952 if (current_function_parms)
11954 /* This case is when the function was defined with an ANSI prototype.
11955 The parms already have decls, so we need not do anything here
11956 except record them as in effect
11957 and complain if any redundant old-style parm decls were written. */
11959 tree specparms = current_function_parms;
11962 /* Must clear this because it might contain TYPE_DECLs declared
11964 current_binding_level->names = NULL;
11966 /* If we're doing semantic analysis, then we'll call pushdecl
11967 for each of these. We must do them in reverse order so that
11968 they end in the correct forward order. */
11969 specparms = nreverse (specparms);
11971 for (parm = specparms; parm; parm = next)
11973 next = TREE_CHAIN (parm);
11974 if (TREE_CODE (parm) == PARM_DECL)
11976 if (DECL_NAME (parm) == NULL_TREE
11977 || TREE_CODE (parm) != VOID_TYPE)
11980 error ("parameter %qD declared void", parm);
11984 /* If we find an enum constant or a type tag,
11985 put it aside for the moment. */
11986 TREE_CHAIN (parm) = NULL_TREE;
11987 nonparms = chainon (nonparms, parm);
11991 /* Get the decls in their original chain order and record in the
11992 function. This is all and only the PARM_DECLs that were
11993 pushed into scope by the loop above. */
11994 DECL_ARGUMENTS (fndecl) = getdecls ();
11997 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11999 /* Now store the final chain of decls for the arguments
12000 as the decl-chain of the current lexical scope.
12001 Put the enumerators in as well, at the front so that
12002 DECL_ARGUMENTS is not modified. */
12003 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12005 if (use_eh_spec_block (current_function_decl))
12006 current_eh_spec_block = begin_eh_spec_block ();
12010 /* We have finished doing semantic analysis on DECL, but have not yet
12011 generated RTL for its body. Save away our current state, so that
12012 when we want to generate RTL later we know what to do. */
12015 save_function_data (tree decl)
12017 struct language_function *f;
12019 /* Save the language-specific per-function data so that we can
12020 get it back when we really expand this function. */
12021 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12024 f = GGC_NEW (struct language_function);
12025 memcpy (f, cp_function_chain, sizeof (struct language_function));
12026 DECL_SAVED_FUNCTION_DATA (decl) = f;
12028 /* Clear out the bits we don't need. */
12029 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12030 f->bindings = NULL;
12031 f->x_local_names = NULL;
12035 /* Set the return value of the constructor (if present). */
12038 finish_constructor_body (void)
12043 if (targetm.cxx.cdtor_returns_this ()
12044 && (! TYPE_FOR_JAVA (current_class_type)))
12046 /* Any return from a constructor will end up here. */
12047 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12049 val = DECL_ARGUMENTS (current_function_decl);
12050 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12051 DECL_RESULT (current_function_decl), val);
12052 /* Return the address of the object. */
12053 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12054 add_stmt (exprstmt);
12058 /* Do all the processing for the beginning of a destructor; set up the
12059 vtable pointers and cleanups for bases and members. */
12062 begin_destructor_body (void)
12064 tree compound_stmt;
12066 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12067 issued an error message. We still want to try to process the
12068 body of the function, but initialize_vtbl_ptrs will crash if
12069 TYPE_BINFO is NULL. */
12070 if (COMPLETE_TYPE_P (current_class_type))
12072 compound_stmt = begin_compound_stmt (0);
12073 /* Make all virtual function table pointers in non-virtual base
12074 classes point to CURRENT_CLASS_TYPE's virtual function
12076 initialize_vtbl_ptrs (current_class_ptr);
12077 finish_compound_stmt (compound_stmt);
12079 /* And insert cleanups for our bases and members so that they
12080 will be properly destroyed if we throw. */
12081 push_base_cleanups ();
12085 /* At the end of every destructor we generate code to delete the object if
12086 necessary. Do that now. */
12089 finish_destructor_body (void)
12093 /* Any return from a destructor will end up here; that way all base
12094 and member cleanups will be run when the function returns. */
12095 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12097 /* In a virtual destructor, we must call delete. */
12098 if (DECL_VIRTUAL_P (current_function_decl))
12101 tree virtual_size = cxx_sizeof (current_class_type);
12105 At the point of definition of a virtual destructor (including
12106 an implicit definition), non-placement operator delete shall
12107 be looked up in the scope of the destructor's class and if
12108 found shall be accessible and unambiguous. */
12109 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12111 /*global_p=*/false,
12112 /*placement=*/NULL_TREE,
12113 /*alloc_fn=*/NULL_TREE);
12115 if_stmt = begin_if_stmt ();
12116 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12117 current_in_charge_parm,
12120 finish_expr_stmt (exprstmt);
12121 finish_then_clause (if_stmt);
12122 finish_if_stmt (if_stmt);
12125 if (targetm.cxx.cdtor_returns_this ())
12129 val = DECL_ARGUMENTS (current_function_decl);
12130 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12131 DECL_RESULT (current_function_decl), val);
12132 /* Return the address of the object. */
12133 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12134 add_stmt (exprstmt);
12138 /* Do the necessary processing for the beginning of a function body, which
12139 in this case includes member-initializers, but not the catch clauses of
12140 a function-try-block. Currently, this means opening a binding level
12141 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12144 begin_function_body (void)
12148 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12151 if (processing_template_decl)
12152 /* Do nothing now. */;
12154 /* Always keep the BLOCK node associated with the outermost pair of
12155 curly braces of a function. These are needed for correct
12156 operation of dwarfout.c. */
12157 keep_next_level (true);
12159 stmt = begin_compound_stmt (BCS_FN_BODY);
12161 if (processing_template_decl)
12162 /* Do nothing now. */;
12163 else if (DECL_DESTRUCTOR_P (current_function_decl))
12164 begin_destructor_body ();
12169 /* Do the processing for the end of a function body. Currently, this means
12170 closing out the cleanups for fully-constructed bases and members, and in
12171 the case of the destructor, deleting the object if desired. Again, this
12172 is only meaningful for [cd]tors, since they are the only functions where
12173 there is a significant distinction between the main body and any
12174 function catch clauses. Handling, say, main() return semantics here
12175 would be wrong, as flowing off the end of a function catch clause for
12176 main() would also need to return 0. */
12179 finish_function_body (tree compstmt)
12181 if (compstmt == NULL_TREE)
12184 /* Close the block. */
12185 finish_compound_stmt (compstmt);
12187 if (processing_template_decl)
12188 /* Do nothing now. */;
12189 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12190 finish_constructor_body ();
12191 else if (DECL_DESTRUCTOR_P (current_function_decl))
12192 finish_destructor_body ();
12195 /* Given a function, returns the BLOCK corresponding to the outermost level
12196 of curly braces, skipping the artificial block created for constructor
12200 outer_curly_brace_block (tree fndecl)
12202 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12203 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12204 /* Skip the artificial function body block. */
12205 block = BLOCK_SUBBLOCKS (block);
12209 /* Finish up a function declaration and compile that function
12210 all the way to assembler language output. The free the storage
12211 for the function definition.
12213 FLAGS is a bitwise or of the following values:
12215 We just finished processing the body of an in-class inline
12216 function definition. (This processing will have taken place
12217 after the class definition is complete.) */
12220 finish_function (int flags)
12222 tree fndecl = current_function_decl;
12223 tree fntype, ctype = NULL_TREE;
12224 int inclass_inline = (flags & 2) != 0;
12227 /* When we get some parse errors, we can end up without a
12228 current_function_decl, so cope. */
12229 if (fndecl == NULL_TREE)
12230 return error_mark_node;
12232 gcc_assert (!defer_mark_used_calls);
12233 defer_mark_used_calls = true;
12235 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12236 && DECL_VIRTUAL_P (fndecl)
12237 && !processing_template_decl)
12239 tree fnclass = DECL_CONTEXT (fndecl);
12240 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12241 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12244 nested = function_depth > 1;
12245 fntype = TREE_TYPE (fndecl);
12247 /* TREE_READONLY (fndecl) = 1;
12248 This caused &foo to be of type ptr-to-const-function
12249 which then got a warning when stored in a ptr-to-function variable. */
12251 gcc_assert (building_stmt_tree ());
12252 /* The current function is being defined, so its DECL_INITIAL should
12253 be set, and unless there's a multiple definition, it should be
12254 error_mark_node. */
12255 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12257 /* For a cloned function, we've already got all the code we need;
12258 there's no need to add any extra bits. */
12259 if (!DECL_CLONED_FUNCTION_P (fndecl))
12261 if (DECL_MAIN_P (current_function_decl))
12265 /* Make it so that `main' always returns 0 by default (or
12268 stmt = finish_return_stmt (integer_one_node);
12270 stmt = finish_return_stmt (integer_zero_node);
12272 /* Hack. We don't want the middle-end to warn that this
12273 return is unreachable, so put the statement on the
12276 location_t linezero = linemap_line_start (line_table, 0, 1);
12277 SET_EXPR_LOCATION (stmt, linezero);
12281 if (use_eh_spec_block (current_function_decl))
12282 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12283 (TREE_TYPE (current_function_decl)),
12284 current_eh_spec_block);
12287 /* If we're saving up tree structure, tie off the function now. */
12288 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12290 finish_fname_decls ();
12292 /* If this function can't throw any exceptions, remember that. */
12293 if (!processing_template_decl
12294 && !cp_function_chain->can_throw
12295 && !flag_non_call_exceptions
12296 && !DECL_REPLACEABLE_P (fndecl))
12297 TREE_NOTHROW (fndecl) = 1;
12299 /* This must come after expand_function_end because cleanups might
12300 have declarations (from inline functions) that need to go into
12301 this function's blocks. */
12303 /* If the current binding level isn't the outermost binding level
12304 for this function, either there is a bug, or we have experienced
12305 syntax errors and the statement tree is malformed. */
12306 if (current_binding_level->kind != sk_function_parms)
12308 /* Make sure we have already experienced errors. */
12309 gcc_assert (errorcount);
12311 /* Throw away the broken statement tree and extra binding
12313 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12315 while (current_binding_level->kind != sk_function_parms)
12317 if (current_binding_level->kind == sk_class)
12318 pop_nested_class ();
12320 poplevel (0, 0, 0);
12323 poplevel (1, 0, 1);
12325 /* Statements should always be full-expressions at the outermost set
12326 of curly braces for a function. */
12327 gcc_assert (stmts_are_full_exprs_p ());
12329 /* Set up the named return value optimization, if we can. Candidate
12330 variables are selected in check_return_expr. */
12331 if (current_function_return_value)
12333 tree r = current_function_return_value;
12336 if (r != error_mark_node
12337 /* This is only worth doing for fns that return in memory--and
12338 simpler, since we don't have to worry about promoted modes. */
12339 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12340 /* Only allow this for variables declared in the outer scope of
12341 the function so we know that their lifetime always ends with a
12342 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12343 we were to do this optimization in tree-ssa. */
12344 && (outer = outer_curly_brace_block (fndecl))
12345 && chain_member (r, BLOCK_VARS (outer)))
12346 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12348 current_function_return_value = NULL_TREE;
12351 /* Remember that we were in class scope. */
12352 if (current_class_name)
12353 ctype = current_class_type;
12355 /* Must mark the RESULT_DECL as being in this function. */
12356 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12358 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12359 to the FUNCTION_DECL node itself. */
12360 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12362 /* Save away current state, if appropriate. */
12363 if (!processing_template_decl)
12364 save_function_data (fndecl);
12366 /* Complain if there's just no return statement. */
12367 if (warn_return_type
12368 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12369 && !dependent_type_p (TREE_TYPE (fntype))
12370 && !current_function_returns_value && !current_function_returns_null
12371 /* Don't complain if we abort or throw. */
12372 && !current_function_returns_abnormally
12373 && !DECL_NAME (DECL_RESULT (fndecl))
12374 && !TREE_NO_WARNING (fndecl)
12375 /* Structor return values (if any) are set by the compiler. */
12376 && !DECL_CONSTRUCTOR_P (fndecl)
12377 && !DECL_DESTRUCTOR_P (fndecl))
12379 warning (OPT_Wreturn_type,
12380 "no return statement in function returning non-void");
12381 TREE_NO_WARNING (fndecl) = 1;
12384 /* Store the end of the function, so that we get good line number
12385 info for the epilogue. */
12386 cfun->function_end_locus = input_location;
12388 /* Genericize before inlining. */
12389 if (!processing_template_decl)
12391 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12392 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12393 cp_genericize (fndecl);
12394 /* Clear out the bits we don't need. */
12395 f->x_current_class_ptr = NULL;
12396 f->x_current_class_ref = NULL;
12397 f->x_eh_spec_block = NULL;
12398 f->x_in_charge_parm = NULL;
12399 f->x_vtt_parm = NULL;
12400 f->x_return_value = NULL;
12401 f->bindings = NULL;
12402 f->extern_decl_map = NULL;
12404 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12405 c_warn_unused_result (gimple_body (fndecl));
12407 /* Clear out the bits we don't need. */
12408 local_names = NULL;
12410 /* We're leaving the context of this function, so zap cfun. It's still in
12411 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12413 current_function_decl = NULL;
12415 /* If this is an in-class inline definition, we may have to pop the
12416 bindings for the template parameters that we added in
12417 maybe_begin_member_template_processing when start_function was
12419 if (inclass_inline)
12420 maybe_end_member_template_processing ();
12422 /* Leave the scope of the class. */
12424 pop_nested_class ();
12430 /* Let the error reporting routines know that we're outside a
12431 function. For a nested function, this value is used in
12432 cxx_pop_function_context and then reset via pop_function_context. */
12433 current_function_decl = NULL_TREE;
12435 defer_mark_used_calls = false;
12436 if (deferred_mark_used_calls)
12441 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12443 VEC_free (tree, gc, deferred_mark_used_calls);
12449 /* Create the FUNCTION_DECL for a function definition.
12450 DECLSPECS and DECLARATOR are the parts of the declaration;
12451 they describe the return type and the name of the function,
12452 but twisted together in a fashion that parallels the syntax of C.
12454 This function creates a binding context for the function body
12455 as well as setting up the FUNCTION_DECL in current_function_decl.
12457 Returns a FUNCTION_DECL on success.
12459 If the DECLARATOR is not suitable for a function (it defines a datum
12460 instead), we return 0, which tells yyparse to report a parse error.
12462 May return void_type_node indicating that this method is actually
12463 a friend. See grokfield for more details.
12465 Came here with a `.pushlevel' .
12467 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12468 CHANGES TO CODE IN `grokfield'. */
12471 start_method (cp_decl_specifier_seq *declspecs,
12472 const cp_declarator *declarator, tree attrlist)
12474 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12477 if (fndecl == error_mark_node)
12478 return error_mark_node;
12480 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12482 error ("invalid member function declaration");
12483 return error_mark_node;
12487 cplus_decl_attributes (&fndecl, attrlist, 0);
12489 /* Pass friends other than inline friend functions back. */
12490 if (fndecl == void_type_node)
12493 if (DECL_IN_AGGR_P (fndecl))
12495 if (DECL_CONTEXT (fndecl)
12496 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12497 error ("%qD is already defined in class %qT", fndecl,
12498 DECL_CONTEXT (fndecl));
12499 return error_mark_node;
12502 check_template_shadow (fndecl);
12504 DECL_DECLARED_INLINE_P (fndecl) = 1;
12505 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12507 /* We process method specializations in finish_struct_1. */
12508 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12510 fndecl = push_template_decl (fndecl);
12511 if (fndecl == error_mark_node)
12515 if (! DECL_FRIEND_P (fndecl))
12517 if (TREE_CHAIN (fndecl))
12519 fndecl = copy_node (fndecl);
12520 TREE_CHAIN (fndecl) = NULL_TREE;
12524 finish_decl (fndecl, NULL_TREE, NULL_TREE, NULL_TREE);
12526 /* Make a place for the parms. */
12527 begin_scope (sk_function_parms, fndecl);
12529 DECL_IN_AGGR_P (fndecl) = 1;
12533 /* Go through the motions of finishing a function definition.
12534 We don't compile this method until after the whole class has
12537 FINISH_METHOD must return something that looks as though it
12538 came from GROKFIELD (since we are defining a method, after all).
12540 This is called after parsing the body of the function definition.
12541 STMTS is the chain of statements that makes up the function body.
12543 DECL is the ..._DECL that `start_method' provided. */
12546 finish_method (tree decl)
12548 tree fndecl = decl;
12553 if (decl == void_type_node)
12556 old_initial = DECL_INITIAL (fndecl);
12558 /* Undo the level for the parms (from start_method).
12559 This is like poplevel, but it causes nothing to be
12560 saved. Saving information here confuses symbol-table
12561 output routines. Besides, this information will
12562 be correctly output when this method is actually
12565 /* Clear out the meanings of the local variables of this level;
12566 also record in each decl which block it belongs to. */
12568 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12570 if (DECL_NAME (link) != NULL_TREE)
12571 pop_binding (DECL_NAME (link), link);
12572 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12573 DECL_CONTEXT (link) = NULL_TREE;
12576 poplevel (0, 0, 0);
12578 DECL_INITIAL (fndecl) = old_initial;
12580 /* We used to check if the context of FNDECL was different from
12581 current_class_type as another way to get inside here. This didn't work
12582 for String.cc in libg++. */
12583 if (DECL_FRIEND_P (fndecl))
12585 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12587 decl = void_type_node;
12594 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12595 we can lay it out later, when and if its type becomes complete. */
12598 maybe_register_incomplete_var (tree var)
12600 gcc_assert (TREE_CODE (var) == VAR_DECL);
12602 /* Keep track of variables with incomplete types. */
12603 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12604 && DECL_EXTERNAL (var))
12606 tree inner_type = TREE_TYPE (var);
12608 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12609 inner_type = TREE_TYPE (inner_type);
12610 inner_type = TYPE_MAIN_VARIANT (inner_type);
12612 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12613 /* RTTI TD entries are created while defining the type_info. */
12614 || (TYPE_LANG_SPECIFIC (inner_type)
12615 && TYPE_BEING_DEFINED (inner_type)))
12616 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12620 /* Called when a class type (given by TYPE) is defined. If there are
12621 any existing VAR_DECLs whose type has been completed by this
12622 declaration, update them now. */
12625 complete_vars (tree type)
12627 tree *list = &incomplete_vars;
12629 gcc_assert (CLASS_TYPE_P (type));
12632 if (same_type_p (type, TREE_PURPOSE (*list)))
12634 tree var = TREE_VALUE (*list);
12635 tree type = TREE_TYPE (var);
12636 /* Complete the type of the variable. The VAR_DECL itself
12637 will be laid out in expand_expr. */
12638 complete_type (type);
12639 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12640 /* Remove this entry from the list. */
12641 *list = TREE_CHAIN (*list);
12644 list = &TREE_CHAIN (*list);
12647 /* Check for pending declarations which may have abstract type. */
12648 complete_type_check_abstract (type);
12651 /* If DECL is of a type which needs a cleanup, build and return an
12652 expression to perform that cleanup here. Return NULL_TREE if no
12653 cleanup need be done. */
12656 cxx_maybe_build_cleanup (tree decl)
12662 /* Assume no cleanup is required. */
12663 cleanup = NULL_TREE;
12665 if (error_operand_p (decl))
12668 /* Handle "__attribute__((cleanup))". We run the cleanup function
12669 before the destructor since the destructor is what actually
12670 terminates the lifetime of the object. */
12671 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12678 /* Get the name specified by the user for the cleanup function. */
12679 id = TREE_VALUE (TREE_VALUE (attr));
12680 /* Look up the name to find the cleanup function to call. It is
12681 important to use lookup_name here because that is what is
12682 used in c-common.c:handle_cleanup_attribute when performing
12683 initial checks on the attribute. Note that those checks
12684 include ensuring that the function found is not an overloaded
12685 function, or an object with an overloaded call operator,
12686 etc.; we can rely on the fact that the function found is an
12687 ordinary FUNCTION_DECL. */
12688 fn = lookup_name (id);
12689 arg = build_address (decl);
12691 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12693 tf_warning_or_error);
12695 /* Handle ordinary C++ destructors. */
12696 type = TREE_TYPE (decl);
12697 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12699 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12700 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12701 && CLASSTYPE_VBASECLASSES (type));
12705 if (TREE_CODE (type) == ARRAY_TYPE)
12708 addr = build_address (decl);
12710 /* Optimize for space over speed here. */
12711 if (!has_vbases || flag_expensive_optimizations)
12712 flags |= LOOKUP_NONVIRTUAL;
12714 call = build_delete (TREE_TYPE (addr), addr,
12715 sfk_complete_destructor, flags, 0);
12717 cleanup = build_compound_expr (input_location, cleanup, call);
12725 /* When a stmt has been parsed, this function is called. */
12732 /* DECL was originally constructed as a non-static member function,
12733 but turned out to be static. Update it accordingly. */
12736 revert_static_member_fn (tree decl)
12739 tree function = TREE_TYPE (decl);
12740 tree args = TYPE_ARG_TYPES (function);
12742 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12743 != TYPE_UNQUALIFIED)
12744 error ("static member function %q#D declared with type qualifiers", decl);
12746 args = TREE_CHAIN (args);
12747 tmp = build_function_type (TREE_TYPE (function), args);
12748 tmp = build_qualified_type (tmp, cp_type_quals (function));
12749 tmp = build_exception_variant (tmp,
12750 TYPE_RAISES_EXCEPTIONS (function));
12751 TREE_TYPE (decl) = tmp;
12752 if (DECL_ARGUMENTS (decl))
12753 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12754 DECL_STATIC_FUNCTION_P (decl) = 1;
12757 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12758 one of the language-independent trees. */
12760 enum cp_tree_node_structure_enum
12761 cp_tree_node_structure (union lang_tree_node * t)
12763 switch (TREE_CODE (&t->generic))
12765 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12766 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12767 case OVERLOAD: return TS_CP_OVERLOAD;
12768 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12769 case PTRMEM_CST: return TS_CP_PTRMEM;
12770 case BASELINK: return TS_CP_BASELINK;
12771 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12772 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12773 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12774 default: return TS_CP_GENERIC;
12778 /* Build the void_list_node (void_type_node having been created). */
12780 build_void_list_node (void)
12782 tree t = build_tree_list (NULL_TREE, void_type_node);
12787 cp_missing_noreturn_ok_p (tree decl)
12789 /* A missing noreturn is ok for the `main' function. */
12790 return DECL_MAIN_P (decl);
12793 /* Return the COMDAT group into which DECL should be placed. */
12796 cxx_comdat_group (tree decl)
12800 /* Virtual tables, construction virtual tables, and virtual table
12801 tables all go in a single COMDAT group, named after the primary
12803 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12804 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12805 /* For all other DECLs, the COMDAT group is the mangled name of the
12806 declaration itself. */
12809 while (DECL_THUNK_P (decl))
12811 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12812 into the same section as the target function. In that case
12813 we must return target's name. */
12814 tree target = THUNK_TARGET (decl);
12815 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12816 && DECL_SECTION_NAME (target) != NULL
12817 && DECL_ONE_ONLY (target))
12822 name = DECL_ASSEMBLER_NAME (decl);
12825 return IDENTIFIER_POINTER (name);
12828 #include "gt-cp-decl.h"