1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
920 && ! (DECL_EXTERN_C_P (newdecl)
921 && DECL_EXTERN_C_P (olddecl)))
924 if (TREE_CODE (f1) != TREE_CODE (f2))
927 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
929 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
930 && (DECL_BUILT_IN (olddecl)
931 #ifndef NO_IMPLICIT_EXTERN_C
932 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
933 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
937 types_match = self_promoting_args_p (p1);
938 if (p1 == void_list_node)
939 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
941 #ifndef NO_IMPLICIT_EXTERN_C
942 else if (p1 == NULL_TREE
943 && (DECL_EXTERN_C_P (olddecl)
944 && DECL_IN_SYSTEM_HEADER (olddecl)
945 && !DECL_CLASS_SCOPE_P (olddecl))
946 && (DECL_EXTERN_C_P (newdecl)
947 && DECL_IN_SYSTEM_HEADER (newdecl)
948 && !DECL_CLASS_SCOPE_P (newdecl)))
950 types_match = self_promoting_args_p (p2);
951 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 types_match = compparms (p1, p2);
960 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
962 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
963 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
966 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
967 DECL_TEMPLATE_PARMS (olddecl)))
970 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
971 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
972 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
974 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
975 DECL_TEMPLATE_RESULT (newdecl));
979 /* Need to check scope for variable declaration (VAR_DECL).
980 For typedef (TYPE_DECL), scope is ignored. */
981 if (TREE_CODE (newdecl) == VAR_DECL
982 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
984 Two declarations for an object with C language linkage
985 with the same name (ignoring the namespace that qualify
986 it) that appear in different namespace scopes refer to
988 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
991 if (TREE_TYPE (newdecl) == error_mark_node)
992 types_match = TREE_TYPE (olddecl) == error_mark_node;
993 else if (TREE_TYPE (olddecl) == NULL_TREE)
994 types_match = TREE_TYPE (newdecl) == NULL_TREE;
995 else if (TREE_TYPE (newdecl) == NULL_TREE)
998 types_match = comptypes (TREE_TYPE (newdecl),
1000 COMPARE_REDECLARATION);
1006 /* If NEWDECL is `static' and an `extern' was seen previously,
1007 warn about it. OLDDECL is the previous declaration.
1009 Note that this does not apply to the C++ case of declaring
1010 a variable `extern const' and then later `const'.
1012 Don't complain about built-in functions, since they are beyond
1013 the user's control. */
1016 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1020 if (TREE_CODE (newdecl) == TYPE_DECL
1021 || TREE_CODE (newdecl) == TEMPLATE_DECL
1022 || TREE_CODE (newdecl) == CONST_DECL
1023 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1026 /* Don't get confused by static member functions; that's a different
1028 if (TREE_CODE (newdecl) == FUNCTION_DECL
1029 && DECL_STATIC_FUNCTION_P (newdecl))
1032 /* If the old declaration was `static', or the new one isn't, then
1033 then everything is OK. */
1034 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1037 /* It's OK to declare a builtin function as `static'. */
1038 if (TREE_CODE (olddecl) == FUNCTION_DECL
1039 && DECL_ARTIFICIAL (olddecl))
1042 name = DECL_ASSEMBLER_NAME (newdecl);
1043 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1044 permerror (input_location, "previous declaration of %q+D", olddecl);
1047 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1048 function templates. If their exception specifications do not
1049 match, issue a diagnostic. */
1052 check_redeclaration_exception_specification (tree new_decl,
1057 tree new_exceptions;
1058 tree old_exceptions;
1060 new_type = TREE_TYPE (new_decl);
1061 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1062 old_type = TREE_TYPE (old_decl);
1063 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1067 If any declaration of a function has an exception-specification,
1068 all declarations, including the definition and an explicit
1069 specialization, of that function shall have an
1070 exception-specification with the same set of type-ids. */
1071 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1072 && ! DECL_IS_BUILTIN (old_decl)
1074 && !comp_except_specs (new_exceptions, old_exceptions,
1077 error ("declaration of %qF throws different exceptions", new_decl);
1078 error ("from previous declaration %q+F", old_decl);
1082 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1083 && lookup_attribute ("gnu_inline", \
1084 DECL_ATTRIBUTES (fn)))
1086 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1087 If the redeclaration is invalid, a diagnostic is issued, and the
1088 error_mark_node is returned. Otherwise, OLDDECL is returned.
1090 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1093 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1096 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1098 unsigned olddecl_uid = DECL_UID (olddecl);
1099 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1100 int new_defines_function = 0;
1103 if (newdecl == olddecl)
1106 types_match = decls_match (newdecl, olddecl);
1108 /* If either the type of the new decl or the type of the old decl is an
1109 error_mark_node, then that implies that we have already issued an
1110 error (earlier) for some bogus type specification, and in that case,
1111 it is rather pointless to harass the user with yet more error message
1112 about the same declaration, so just pretend the types match here. */
1113 if (TREE_TYPE (newdecl) == error_mark_node
1114 || TREE_TYPE (olddecl) == error_mark_node)
1115 return error_mark_node;
1117 if (DECL_P (olddecl)
1118 && TREE_CODE (newdecl) == FUNCTION_DECL
1119 && TREE_CODE (olddecl) == FUNCTION_DECL
1120 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1122 if (DECL_DECLARED_INLINE_P (newdecl)
1123 && DECL_UNINLINABLE (newdecl)
1124 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1125 /* Already warned elsewhere. */;
1126 else if (DECL_DECLARED_INLINE_P (olddecl)
1127 && DECL_UNINLINABLE (olddecl)
1128 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1129 /* Already warned. */;
1130 else if (DECL_DECLARED_INLINE_P (newdecl)
1131 && DECL_UNINLINABLE (olddecl)
1132 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1134 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1136 warning (OPT_Wattributes, "previous declaration of %q+D "
1137 "with attribute noinline", olddecl);
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (newdecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1143 warning (OPT_Wattributes, "function %q+D redeclared with "
1144 "attribute noinline", newdecl);
1145 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1150 /* Check for redeclaration and other discrepancies. */
1151 if (TREE_CODE (olddecl) == FUNCTION_DECL
1152 && DECL_ARTIFICIAL (olddecl))
1154 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1155 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1157 /* Avoid warnings redeclaring built-ins which have not been
1158 explicitly declared. */
1159 if (DECL_ANTICIPATED (olddecl))
1162 /* If you declare a built-in or predefined function name as static,
1163 the old definition is overridden, but optionally warn this was a
1164 bad choice of name. */
1165 if (! TREE_PUBLIC (newdecl))
1167 warning (OPT_Wshadow, "shadowing %s function %q#D",
1168 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1170 /* Discard the old built-in function. */
1173 /* If the built-in is not ansi, then programs can override
1174 it even globally without an error. */
1175 else if (! DECL_BUILT_IN (olddecl))
1176 warning (0, "library function %q#D redeclared as non-function %q#D",
1180 error ("declaration of %q#D", newdecl);
1181 error ("conflicts with built-in declaration %q#D",
1186 else if (!types_match)
1188 /* Avoid warnings redeclaring built-ins which have not been
1189 explicitly declared. */
1190 if (DECL_ANTICIPATED (olddecl))
1192 /* Deal with fileptr_type_node. FILE type is not known
1193 at the time we create the builtins. */
1196 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1197 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1199 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1202 else if (TREE_VALUE (t2) == fileptr_type_node)
1204 tree t = TREE_VALUE (t1);
1206 if (TREE_CODE (t) == POINTER_TYPE
1207 && TYPE_NAME (TREE_TYPE (t))
1208 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1209 == get_identifier ("FILE")
1210 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1212 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1215 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1216 types_match = decls_match (newdecl, olddecl);
1218 return duplicate_decls (newdecl, olddecl,
1220 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1223 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1226 else if ((DECL_EXTERN_C_P (newdecl)
1227 && DECL_EXTERN_C_P (olddecl))
1228 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1231 /* A near match; override the builtin. */
1233 if (TREE_PUBLIC (newdecl))
1235 warning (0, "new declaration %q#D", newdecl);
1236 warning (0, "ambiguates built-in declaration %q#D",
1240 warning (OPT_Wshadow, "shadowing %s function %q#D",
1241 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1245 /* Discard the old built-in function. */
1248 /* Replace the old RTL to avoid problems with inlining. */
1249 COPY_DECL_RTL (newdecl, olddecl);
1251 /* Even if the types match, prefer the new declarations type for
1252 built-ins which have not been explicitly declared, for
1253 exception lists, etc... */
1254 else if (DECL_ANTICIPATED (olddecl))
1256 tree type = TREE_TYPE (newdecl);
1257 tree attribs = (*targetm.merge_type_attributes)
1258 (TREE_TYPE (olddecl), type);
1260 type = cp_build_type_attribute_variant (type, attribs);
1261 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1264 /* If a function is explicitly declared "throw ()", propagate that to
1265 the corresponding builtin. */
1266 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1267 && DECL_ANTICIPATED (olddecl)
1268 && TREE_NOTHROW (newdecl)
1269 && !TREE_NOTHROW (olddecl)
1270 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1271 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1273 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1275 /* Whether or not the builtin can throw exceptions has no
1276 bearing on this declarator. */
1277 TREE_NOTHROW (olddecl) = 0;
1279 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1281 /* If a builtin function is redeclared as `static', merge
1282 the declarations, but make the original one static. */
1283 DECL_THIS_STATIC (olddecl) = 1;
1284 TREE_PUBLIC (olddecl) = 0;
1286 /* Make the old declaration consistent with the new one so
1287 that all remnants of the builtin-ness of this function
1288 will be banished. */
1289 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1290 COPY_DECL_RTL (newdecl, olddecl);
1293 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1295 /* C++ Standard, 3.3, clause 4:
1296 "[Note: a namespace name or a class template name must be unique
1297 in its declarative region (7.3.2, clause 14). ]" */
1298 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1299 && TREE_CODE (newdecl) != NAMESPACE_DECL
1300 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1301 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1302 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1303 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1305 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1306 && TREE_CODE (newdecl) != TYPE_DECL)
1307 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1308 && TREE_CODE (olddecl) != TYPE_DECL))
1310 /* We do nothing special here, because C++ does such nasty
1311 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1312 get shadowed, and know that if we need to find a TYPE_DECL
1313 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1314 slot of the identifier. */
1318 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1319 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1320 || (TREE_CODE (olddecl) == FUNCTION_DECL
1321 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1325 error ("%q#D redeclared as different kind of symbol", newdecl);
1326 if (TREE_CODE (olddecl) == TREE_LIST)
1327 olddecl = TREE_VALUE (olddecl);
1328 error ("previous declaration of %q+#D", olddecl);
1330 return error_mark_node;
1332 else if (!types_match)
1334 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1335 /* These are certainly not duplicate declarations; they're
1336 from different scopes. */
1339 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1341 /* The name of a class template may not be declared to refer to
1342 any other template, class, function, object, namespace, value,
1343 or type in the same scope. */
1344 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1345 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1347 error ("declaration of template %q#D", newdecl);
1348 error ("conflicts with previous declaration %q+#D", olddecl);
1350 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1351 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1352 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1353 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1354 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1355 DECL_TEMPLATE_PARMS (olddecl))
1356 /* Template functions can be disambiguated by
1358 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1359 TREE_TYPE (TREE_TYPE (olddecl))))
1361 error ("new declaration %q#D", newdecl);
1362 error ("ambiguates old declaration %q+#D", olddecl);
1366 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1368 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1370 error ("declaration of C function %q#D conflicts with",
1372 error ("previous declaration %q+#D here", olddecl);
1374 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1377 error ("new declaration %q#D", newdecl);
1378 error ("ambiguates old declaration %q+#D", olddecl);
1379 return error_mark_node;
1386 error ("conflicting declaration %q#D", newdecl);
1387 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1388 return error_mark_node;
1391 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1392 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1393 && (!DECL_TEMPLATE_INFO (newdecl)
1394 || (DECL_TI_TEMPLATE (newdecl)
1395 != DECL_TI_TEMPLATE (olddecl))))
1396 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1397 && (!DECL_TEMPLATE_INFO (olddecl)
1398 || (DECL_TI_TEMPLATE (olddecl)
1399 != DECL_TI_TEMPLATE (newdecl))))))
1400 /* It's OK to have a template specialization and a non-template
1401 with the same type, or to have specializations of two
1402 different templates with the same type. Note that if one is a
1403 specialization, and the other is an instantiation of the same
1404 template, that we do not exit at this point. That situation
1405 can occur if we instantiate a template class, and then
1406 specialize one of its methods. This situation is valid, but
1407 the declarations must be merged in the usual way. */
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1411 && !DECL_USE_TEMPLATE (newdecl))
1412 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1413 && !DECL_USE_TEMPLATE (olddecl))))
1414 /* One of the declarations is a template instantiation, and the
1415 other is not a template at all. That's OK. */
1417 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1419 /* In [namespace.alias] we have:
1421 In a declarative region, a namespace-alias-definition can be
1422 used to redefine a namespace-alias declared in that declarative
1423 region to refer only to the namespace to which it already
1426 Therefore, if we encounter a second alias directive for the same
1427 alias, we can just ignore the second directive. */
1428 if (DECL_NAMESPACE_ALIAS (newdecl)
1429 && (DECL_NAMESPACE_ALIAS (newdecl)
1430 == DECL_NAMESPACE_ALIAS (olddecl)))
1432 /* [namespace.alias]
1434 A namespace-name or namespace-alias shall not be declared as
1435 the name of any other entity in the same declarative region.
1436 A namespace-name defined at global scope shall not be
1437 declared as the name of any other entity in any global scope
1439 error ("declaration of namespace %qD conflicts with", newdecl);
1440 error ("previous declaration of namespace %q+D here", olddecl);
1441 return error_mark_node;
1445 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1448 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1449 if (DECL_NAME (olddecl) != NULL_TREE)
1450 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1451 ? "%q+#D previously defined here"
1452 : "%q+#D previously declared here", olddecl);
1453 return error_mark_node;
1455 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1456 && DECL_INITIAL (olddecl) != NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1458 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1460 /* Prototype decl follows defn w/o prototype. */
1461 warning (0, "prototype for %q+#D", newdecl);
1462 warning (0, "%Jfollows non-prototype definition here", olddecl);
1464 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1465 || TREE_CODE (olddecl) == VAR_DECL)
1466 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1469 If two declarations of the same function or object
1470 specify different linkage-specifications ..., the program
1471 is ill-formed.... Except for functions with C++ linkage,
1472 a function declaration without a linkage specification
1473 shall not precede the first linkage specification for
1474 that function. A function can be declared without a
1475 linkage specification after an explicit linkage
1476 specification has been seen; the linkage explicitly
1477 specified in the earlier declaration is not affected by
1478 such a function declaration.
1480 DR 563 raises the question why the restrictions on
1481 functions should not also apply to objects. Older
1482 versions of G++ silently ignore the linkage-specification
1490 which is clearly wrong. Therefore, we now treat objects
1492 if (current_lang_depth () == 0)
1494 /* There is no explicit linkage-specification, so we use
1495 the linkage from the previous declaration. */
1496 if (!DECL_LANG_SPECIFIC (newdecl))
1497 retrofit_lang_decl (newdecl);
1498 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1502 error ("previous declaration of %q+#D with %qL linkage",
1503 olddecl, DECL_LANGUAGE (olddecl));
1504 error ("conflicts with new declaration with %qL linkage",
1505 DECL_LANGUAGE (newdecl));
1509 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1511 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1513 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1514 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1517 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1518 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1520 for (; t1 && t1 != void_list_node;
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1522 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1524 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1527 permerror (input_location, "default argument given for parameter %d of %q#D",
1529 permerror (input_location, "after previous specification in %q+#D", olddecl);
1533 error ("default argument given for parameter %d of %q#D",
1535 error ("after previous specification in %q+#D",
1542 /* Do not merge an implicit typedef with an explicit one. In:
1546 typedef class A A __attribute__ ((foo));
1548 the attribute should apply only to the typedef. */
1549 if (TREE_CODE (olddecl) == TYPE_DECL
1550 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1551 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1554 /* If new decl is `static' and an `extern' was seen previously,
1556 warn_extern_redeclared_static (newdecl, olddecl);
1558 /* We have committed to returning 1 at this point. */
1559 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1561 /* Now that functions must hold information normally held
1562 by field decls, there is extra work to do so that
1563 declaration information does not get destroyed during
1565 if (DECL_VINDEX (olddecl))
1566 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1567 if (DECL_CONTEXT (olddecl))
1568 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1569 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1570 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1571 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1572 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1573 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1594 if (DECL_DELETED_FN (newdecl))
1596 error ("deleted definition of %qD", newdecl);
1597 error ("after previous declaration %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 DECL_ATTRIBUTES (old_result)
1632 = (*targetm.merge_decl_attributes) (old_result, new_result);
1634 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1636 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1637 && DECL_INITIAL (new_result))
1639 if (DECL_INITIAL (old_result))
1640 DECL_UNINLINABLE (old_result) = 1;
1642 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1643 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1644 DECL_NOT_REALLY_EXTERN (old_result)
1645 = DECL_NOT_REALLY_EXTERN (new_result);
1646 DECL_INTERFACE_KNOWN (old_result)
1647 = DECL_INTERFACE_KNOWN (new_result);
1648 DECL_DECLARED_INLINE_P (old_result)
1649 = DECL_DECLARED_INLINE_P (new_result);
1650 DECL_DISREGARD_INLINE_LIMITS (old_result)
1651 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1656 DECL_DECLARED_INLINE_P (old_result)
1657 |= DECL_DECLARED_INLINE_P (new_result);
1658 DECL_DISREGARD_INLINE_LIMITS (old_result)
1659 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1660 check_redeclaration_exception_specification (newdecl, olddecl);
1664 /* If the new declaration is a definition, update the file and
1665 line information on the declaration, and also make
1666 the old declaration the same definition. */
1667 if (DECL_INITIAL (new_result) != NULL_TREE)
1669 DECL_SOURCE_LOCATION (olddecl)
1670 = DECL_SOURCE_LOCATION (old_result)
1671 = DECL_SOURCE_LOCATION (newdecl);
1672 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1673 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1676 DECL_ARGUMENTS (old_result)
1677 = DECL_ARGUMENTS (new_result);
1678 for (parm = DECL_ARGUMENTS (old_result); parm;
1679 parm = TREE_CHAIN (parm))
1680 DECL_CONTEXT (parm) = old_result;
1689 /* Automatically handles default parameters. */
1690 tree oldtype = TREE_TYPE (olddecl);
1693 /* Merge the data types specified in the two decls. */
1694 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1696 /* If merge_types produces a non-typedef type, just use the old type. */
1697 if (TREE_CODE (newdecl) == TYPE_DECL
1698 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1701 if (TREE_CODE (newdecl) == VAR_DECL)
1703 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1704 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1705 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1706 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1707 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1708 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1710 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1711 if (DECL_LANG_SPECIFIC (olddecl)
1712 && CP_DECL_THREADPRIVATE_P (olddecl))
1714 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1715 if (!DECL_LANG_SPECIFIC (newdecl))
1716 retrofit_lang_decl (newdecl);
1718 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1719 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1723 /* Do this after calling `merge_types' so that default
1724 parameters don't confuse us. */
1725 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1726 check_redeclaration_exception_specification (newdecl, olddecl);
1727 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1729 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1730 check_default_args (newdecl);
1732 /* Lay the type out, unless already done. */
1733 if (! same_type_p (newtype, oldtype)
1734 && TREE_TYPE (newdecl) != error_mark_node
1735 && !(processing_template_decl && uses_template_parms (newdecl)))
1736 layout_type (TREE_TYPE (newdecl));
1738 if ((TREE_CODE (newdecl) == VAR_DECL
1739 || TREE_CODE (newdecl) == PARM_DECL
1740 || TREE_CODE (newdecl) == RESULT_DECL
1741 || TREE_CODE (newdecl) == FIELD_DECL
1742 || TREE_CODE (newdecl) == TYPE_DECL)
1743 && !(processing_template_decl && uses_template_parms (newdecl)))
1744 layout_decl (newdecl, 0);
1746 /* Merge the type qualifiers. */
1747 if (TREE_READONLY (newdecl))
1748 TREE_READONLY (olddecl) = 1;
1749 if (TREE_THIS_VOLATILE (newdecl))
1750 TREE_THIS_VOLATILE (olddecl) = 1;
1751 if (TREE_NOTHROW (newdecl))
1752 TREE_NOTHROW (olddecl) = 1;
1754 /* Merge deprecatedness. */
1755 if (TREE_DEPRECATED (newdecl))
1756 TREE_DEPRECATED (olddecl) = 1;
1758 /* Preserve function specific target and optimization options */
1759 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1761 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1762 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1763 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1764 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1766 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1767 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1768 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1769 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1772 /* Merge the initialization information. */
1773 if (DECL_INITIAL (newdecl) == NULL_TREE
1774 && DECL_INITIAL (olddecl) != NULL_TREE)
1776 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1777 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1778 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1779 && DECL_LANG_SPECIFIC (newdecl)
1780 && DECL_LANG_SPECIFIC (olddecl))
1782 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1783 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1787 /* Merge the section attribute.
1788 We want to issue an error if the sections conflict but that must be
1789 done later in decl_attributes since we are called before attributes
1791 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1792 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1794 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1796 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1797 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1798 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1799 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1800 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1801 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1802 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1803 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1804 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1805 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1806 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1807 /* Keep the old RTL. */
1808 COPY_DECL_RTL (olddecl, newdecl);
1810 else if (TREE_CODE (newdecl) == VAR_DECL
1811 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1813 /* Keep the old RTL. We cannot keep the old RTL if the old
1814 declaration was for an incomplete object and the new
1815 declaration is not since many attributes of the RTL will
1817 COPY_DECL_RTL (olddecl, newdecl);
1820 /* If cannot merge, then use the new type and qualifiers,
1821 and don't preserve the old rtl. */
1824 /* Clean out any memory we had of the old declaration. */
1825 tree oldstatic = value_member (olddecl, static_aggregates);
1827 TREE_VALUE (oldstatic) = error_mark_node;
1829 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1830 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1831 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1832 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1835 /* Merge the storage class information. */
1836 merge_weak (newdecl, olddecl);
1838 if (DECL_ONE_ONLY (olddecl))
1839 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1841 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1842 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1843 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1844 if (! DECL_EXTERNAL (olddecl))
1845 DECL_EXTERNAL (newdecl) = 0;
1847 new_template = NULL_TREE;
1848 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1850 bool new_redefines_gnu_inline = false;
1852 if (new_defines_function
1853 && ((DECL_INTERFACE_KNOWN (olddecl)
1854 && TREE_CODE (olddecl) == FUNCTION_DECL)
1855 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1856 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1857 == FUNCTION_DECL))))
1861 if (TREE_CODE (fn) == TEMPLATE_DECL)
1862 fn = DECL_TEMPLATE_RESULT (olddecl);
1864 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1867 if (!new_redefines_gnu_inline)
1869 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1870 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1871 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1873 DECL_TEMPLATE_INSTANTIATED (newdecl)
1874 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1876 /* If the OLDDECL is an instantiation and/or specialization,
1877 then the NEWDECL must be too. But, it may not yet be marked
1878 as such if the caller has created NEWDECL, but has not yet
1879 figured out that it is a redeclaration. */
1880 if (!DECL_USE_TEMPLATE (newdecl))
1881 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1883 /* Don't really know how much of the language-specific
1884 values we should copy from old to new. */
1885 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1886 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1887 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1888 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1889 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1890 if (DECL_TEMPLATE_INFO (newdecl))
1891 new_template = DECL_TI_TEMPLATE (newdecl);
1892 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1893 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1894 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1895 olddecl_friend = DECL_FRIEND_P (olddecl);
1896 hidden_friend = (DECL_ANTICIPATED (olddecl)
1897 && DECL_HIDDEN_FRIEND_P (olddecl)
1898 && newdecl_is_friend);
1900 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1901 if (TREE_CODE (newdecl) == FUNCTION_DECL
1902 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1904 DECL_BEFRIENDING_CLASSES (newdecl)
1905 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1906 DECL_BEFRIENDING_CLASSES (olddecl));
1907 /* DECL_THUNKS is only valid for virtual functions,
1908 otherwise it is a DECL_FRIEND_CONTEXT. */
1909 if (DECL_VIRTUAL_P (newdecl))
1910 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1914 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1918 /* Merge parameter attributes. */
1919 tree oldarg, newarg;
1920 for (oldarg = DECL_ARGUMENTS(olddecl),
1921 newarg = DECL_ARGUMENTS(newdecl);
1923 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1924 DECL_ATTRIBUTES (newarg)
1925 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1926 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1929 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1930 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1932 /* If newdecl is not a specialization, then it is not a
1933 template-related function at all. And that means that we
1934 should have exited above, returning 0. */
1935 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1937 if (TREE_USED (olddecl))
1938 /* From [temp.expl.spec]:
1940 If a template, a member template or the member of a class
1941 template is explicitly specialized then that
1942 specialization shall be declared before the first use of
1943 that specialization that would cause an implicit
1944 instantiation to take place, in every translation unit in
1945 which such a use occurs. */
1946 error ("explicit specialization of %qD after first use",
1949 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1951 /* Don't propagate visibility from the template to the
1952 specialization here. We'll do that in determine_visibility if
1954 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1956 /* [temp.expl.spec/14] We don't inline explicit specialization
1957 just because the primary template says so. */
1959 else if (new_defines_function && DECL_INITIAL (olddecl))
1961 /* Never inline re-defined extern inline functions.
1962 FIXME: this could be better handled by keeping both
1963 function as separate declarations. */
1964 DECL_UNINLINABLE (newdecl) = 1;
1968 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1969 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1971 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1973 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1974 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1976 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1977 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1978 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1979 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1982 /* Preserve abstractness on cloned [cd]tors. */
1983 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1985 /* Update newdecl's parms to point at olddecl. */
1986 for (parm = DECL_ARGUMENTS (newdecl); parm;
1987 parm = TREE_CHAIN (parm))
1988 DECL_CONTEXT (parm) = olddecl;
1992 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1993 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1994 COPY_DECL_RTL (newdecl, olddecl);
1996 if (! types_match || new_defines_function)
1998 /* These need to be copied so that the names are available.
1999 Note that if the types do match, we'll preserve inline
2000 info and other bits, but if not, we won't. */
2001 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2002 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2004 if (new_defines_function)
2005 /* If defining a function declared with other language
2006 linkage, use the previously declared language linkage. */
2007 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2008 else if (types_match)
2010 /* If redeclaring a builtin function, and not a definition,
2011 it stays built in. */
2012 if (DECL_BUILT_IN (olddecl))
2014 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2015 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2016 /* If we're keeping the built-in definition, keep the rtl,
2017 regardless of declaration matches. */
2018 COPY_DECL_RTL (olddecl, newdecl);
2021 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2022 /* Don't clear out the arguments if we're just redeclaring a
2024 if (DECL_ARGUMENTS (olddecl))
2025 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2028 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2029 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2031 /* Now preserve various other info from the definition. */
2032 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2033 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2034 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2035 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2037 /* Warn about conflicting visibility specifications. */
2038 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2039 && DECL_VISIBILITY_SPECIFIED (newdecl)
2040 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2042 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2043 "because it", newdecl);
2044 warning (OPT_Wattributes, "%Jconflicts with previous "
2045 "declaration here", olddecl);
2047 /* Choose the declaration which specified visibility. */
2048 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2050 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2051 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2053 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2054 so keep this behavior. */
2055 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2057 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2058 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2061 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2062 with that from NEWDECL below. */
2063 if (DECL_LANG_SPECIFIC (olddecl))
2065 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2066 != DECL_LANG_SPECIFIC (newdecl));
2067 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2070 /* Merge the USED information. */
2071 if (TREE_USED (olddecl))
2072 TREE_USED (newdecl) = 1;
2073 else if (TREE_USED (newdecl))
2074 TREE_USED (olddecl) = 1;
2076 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2080 function_size = sizeof (struct tree_decl_common);
2082 memcpy ((char *) olddecl + sizeof (struct tree_common),
2083 (char *) newdecl + sizeof (struct tree_common),
2084 function_size - sizeof (struct tree_common));
2086 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2087 (char *) newdecl + sizeof (struct tree_decl_common),
2088 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2090 /* If newdecl is a template instantiation, it is possible that
2091 the following sequence of events has occurred:
2093 o A friend function was declared in a class template. The
2094 class template was instantiated.
2096 o The instantiation of the friend declaration was
2097 recorded on the instantiation list, and is newdecl.
2099 o Later, however, instantiate_class_template called pushdecl
2100 on the newdecl to perform name injection. But, pushdecl in
2101 turn called duplicate_decls when it discovered that another
2102 declaration of a global function with the same name already
2105 o Here, in duplicate_decls, we decided to clobber newdecl.
2107 If we're going to do that, we'd better make sure that
2108 olddecl, and not newdecl, is on the list of
2109 instantiations so that if we try to do the instantiation
2110 again we won't get the clobbered declaration. */
2111 reregister_specialization (newdecl,
2117 size_t size = tree_code_size (TREE_CODE (olddecl));
2118 memcpy ((char *) olddecl + sizeof (struct tree_common),
2119 (char *) newdecl + sizeof (struct tree_common),
2120 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2121 switch (TREE_CODE (olddecl))
2131 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2132 (char *) newdecl + sizeof (struct tree_decl_common),
2133 size - sizeof (struct tree_decl_common)
2134 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2138 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2139 (char *) newdecl + sizeof (struct tree_decl_common),
2140 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2141 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2145 DECL_UID (olddecl) = olddecl_uid;
2147 DECL_FRIEND_P (olddecl) = 1;
2150 DECL_ANTICIPATED (olddecl) = 1;
2151 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2154 /* NEWDECL contains the merged attribute lists.
2155 Update OLDDECL to be the same. */
2156 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2158 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2159 so that encode_section_info has a chance to look at the new decl
2160 flags and attributes. */
2161 if (DECL_RTL_SET_P (olddecl)
2162 && (TREE_CODE (olddecl) == FUNCTION_DECL
2163 || (TREE_CODE (olddecl) == VAR_DECL
2164 && TREE_STATIC (olddecl))))
2165 make_decl_rtl (olddecl);
2167 /* The NEWDECL will no longer be needed. Because every out-of-class
2168 declaration of a member results in a call to duplicate_decls,
2169 freeing these nodes represents in a significant savings. */
2175 /* Return zero if the declaration NEWDECL is valid
2176 when the declaration OLDDECL (assumed to be for the same name)
2177 has already been seen.
2178 Otherwise return an error message format string with a %s
2179 where the identifier should go. */
2182 redeclaration_error_message (tree newdecl, tree olddecl)
2184 if (TREE_CODE (newdecl) == TYPE_DECL)
2186 /* Because C++ can put things into name space for free,
2187 constructs like "typedef struct foo { ... } foo"
2188 would look like an erroneous redeclaration. */
2189 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2192 return "redefinition of %q#D";
2194 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2196 /* If this is a pure function, its olddecl will actually be
2197 the original initialization to `0' (which we force to call
2198 abort()). Don't complain about redefinition in this case. */
2199 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2200 && DECL_INITIAL (olddecl) == NULL_TREE)
2203 /* If both functions come from different namespaces, this is not
2204 a redeclaration - this is a conflict with a used function. */
2205 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2206 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2207 && ! decls_match (olddecl, newdecl))
2208 return "%qD conflicts with used function";
2210 /* We'll complain about linkage mismatches in
2211 warn_extern_redeclared_static. */
2213 /* Defining the same name twice is no good. */
2214 if (DECL_INITIAL (olddecl) != NULL_TREE
2215 && DECL_INITIAL (newdecl) != NULL_TREE)
2217 if (DECL_NAME (olddecl) == NULL_TREE)
2218 return "%q#D not declared in class";
2219 else if (!GNU_INLINE_P (olddecl)
2220 || GNU_INLINE_P (newdecl))
2221 return "redefinition of %q#D";
2224 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2226 bool olda = GNU_INLINE_P (olddecl);
2227 bool newa = GNU_INLINE_P (newdecl);
2232 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2234 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2240 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2244 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2246 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2247 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2248 return "redefinition of %q#D";
2252 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2253 || (DECL_TEMPLATE_RESULT (newdecl)
2254 == DECL_TEMPLATE_RESULT (olddecl)))
2257 nt = DECL_TEMPLATE_RESULT (newdecl);
2258 if (DECL_TEMPLATE_INFO (nt))
2259 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2260 ot = DECL_TEMPLATE_RESULT (olddecl);
2261 if (DECL_TEMPLATE_INFO (ot))
2262 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2263 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2264 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2265 return "redefinition of %q#D";
2267 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2269 bool olda = GNU_INLINE_P (ot);
2270 bool newa = GNU_INLINE_P (nt);
2275 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2277 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2281 /* Core issue #226 (C++0x):
2283 If a friend function template declaration specifies a
2284 default template-argument, that declaration shall be a
2285 definition and shall be the only declaration of the
2286 function template in the translation unit. */
2287 if ((cxx_dialect != cxx98)
2288 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2289 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2290 /*is_primary=*/1, /*is_partial=*/0,
2291 /*is_friend_decl=*/2))
2292 return "redeclaration of friend %q#D may not have default template arguments";
2296 else if (TREE_CODE (newdecl) == VAR_DECL
2297 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2298 && (! DECL_LANG_SPECIFIC (olddecl)
2299 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2300 || DECL_THREAD_LOCAL_P (newdecl)))
2302 /* Only variables can be thread-local, and all declarations must
2303 agree on this property. */
2304 if (DECL_THREAD_LOCAL_P (newdecl))
2305 return "thread-local declaration of %q#D follows "
2306 "non-thread-local declaration";
2308 return "non-thread-local declaration of %q#D follows "
2309 "thread-local declaration";
2311 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2313 /* The objects have been declared at namespace scope. If either
2314 is a member of an anonymous union, then this is an invalid
2315 redeclaration. For example:
2321 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2322 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2323 return "redeclaration of %q#D";
2324 /* If at least one declaration is a reference, there is no
2325 conflict. For example:
2331 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2333 /* Reject two definitions. */
2334 return "redefinition of %q#D";
2338 /* Objects declared with block scope: */
2339 /* Reject two definitions, and reject a definition
2340 together with an external reference. */
2341 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2342 return "redeclaration of %q#D";
2347 /* Hash and equality functions for the named_label table. */
2350 named_label_entry_hash (const void *data)
2352 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2353 return DECL_UID (ent->label_decl);
2357 named_label_entry_eq (const void *a, const void *b)
2359 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2360 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2361 return ent_a->label_decl == ent_b->label_decl;
2364 /* Create a new label, named ID. */
2367 make_label_decl (tree id, int local_p)
2369 struct named_label_entry *ent;
2373 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2375 DECL_CONTEXT (decl) = current_function_decl;
2376 DECL_MODE (decl) = VOIDmode;
2377 C_DECLARED_LABEL_FLAG (decl) = local_p;
2379 /* Say where one reference is to the label, for the sake of the
2380 error if it is not defined. */
2381 DECL_SOURCE_LOCATION (decl) = input_location;
2383 /* Record the fact that this identifier is bound to this label. */
2384 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2386 /* Create the label htab for the function on demand. */
2388 named_labels = htab_create_ggc (13, named_label_entry_hash,
2389 named_label_entry_eq, NULL);
2391 /* Record this label on the list of labels used in this function.
2392 We do this before calling make_label_decl so that we get the
2393 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2394 ent = GGC_CNEW (struct named_label_entry);
2395 ent->label_decl = decl;
2397 slot = htab_find_slot (named_labels, ent, INSERT);
2398 gcc_assert (*slot == NULL);
2404 /* Look for a label named ID in the current function. If one cannot
2405 be found, create one. (We keep track of used, but undefined,
2406 labels, and complain about them at the end of a function.) */
2409 lookup_label (tree id)
2413 timevar_push (TV_NAME_LOOKUP);
2414 /* You can't use labels at global scope. */
2415 if (current_function_decl == NULL_TREE)
2417 error ("label %qE referenced outside of any function", id);
2418 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2421 /* See if we've already got this label. */
2422 decl = IDENTIFIER_LABEL_VALUE (id);
2423 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2424 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2426 decl = make_label_decl (id, /*local_p=*/0);
2427 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2430 /* Declare a local label named ID. */
2433 declare_local_label (tree id)
2437 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2438 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2439 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2440 current_binding_level->shadowed_labels);
2441 current_binding_level->shadowed_labels = shadow;
2443 decl = make_label_decl (id, /*local_p=*/1);
2444 TREE_VALUE (shadow) = decl;
2449 /* Returns nonzero if it is ill-formed to jump past the declaration of
2450 DECL. Returns 2 if it's also a real problem. */
2453 decl_jump_unsafe (tree decl)
2455 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2456 || TREE_TYPE (decl) == error_mark_node)
2459 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2460 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2463 if (pod_type_p (TREE_TYPE (decl)))
2466 /* The POD stuff is just pedantry; why should it matter if the class
2467 contains a field of pointer to member type? */
2471 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2474 identify_goto (tree decl, const location_t *locus)
2477 permerror (input_location, "jump to label %qD", decl);
2479 permerror (input_location, "jump to case label");
2481 permerror (input_location, "%H from here", locus);
2484 /* Check that a single previously seen jump to a newly defined label
2485 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2486 the jump context; NAMES are the names in scope in LEVEL at the jump
2487 context; LOCUS is the source position of the jump or 0. Returns
2488 true if all is well. */
2491 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2492 bool exited_omp, const location_t *locus)
2494 struct cp_binding_level *b;
2495 bool identified = false, saw_eh = false, saw_omp = false;
2499 identify_goto (decl, locus);
2500 error (" exits OpenMP structured block");
2501 identified = saw_omp = true;
2504 for (b = current_binding_level; b ; b = b->level_chain)
2506 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2508 for (new_decls = b->names; new_decls != old_decls;
2509 new_decls = TREE_CHAIN (new_decls))
2511 int problem = decl_jump_unsafe (new_decls);
2517 identify_goto (decl, locus);
2521 error (" crosses initialization of %q+#D", new_decls);
2523 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2528 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2532 identify_goto (decl, locus);
2535 if (b->kind == sk_try)
2536 error (" enters try block");
2538 error (" enters catch block");
2541 if (b->kind == sk_omp && !saw_omp)
2545 identify_goto (decl, locus);
2548 error (" enters OpenMP structured block");
2557 check_previous_goto (tree decl, struct named_label_use_entry *use)
2559 check_previous_goto_1 (decl, use->binding_level,
2560 use->names_in_scope, use->in_omp_scope,
2561 &use->o_goto_locus);
2565 check_switch_goto (struct cp_binding_level* level)
2567 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2570 /* Check that a new jump to a label DECL is OK. Called by
2571 finish_goto_stmt. */
2574 check_goto (tree decl)
2576 struct named_label_entry *ent, dummy;
2577 bool saw_catch = false, identified = false;
2580 /* We can't know where a computed goto is jumping.
2581 So we assume that it's OK. */
2582 if (TREE_CODE (decl) != LABEL_DECL)
2585 /* We didn't record any information about this label when we created it,
2586 and there's not much point since it's trivial to analyze as a return. */
2587 if (decl == cdtor_label)
2590 dummy.label_decl = decl;
2591 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2592 gcc_assert (ent != NULL);
2594 /* If the label hasn't been defined yet, defer checking. */
2595 if (! DECL_INITIAL (decl))
2597 struct named_label_use_entry *new_use;
2599 /* Don't bother creating another use if the last goto had the
2600 same data, and will therefore create the same set of errors. */
2602 && ent->uses->names_in_scope == current_binding_level->names)
2605 new_use = GGC_NEW (struct named_label_use_entry);
2606 new_use->binding_level = current_binding_level;
2607 new_use->names_in_scope = current_binding_level->names;
2608 new_use->o_goto_locus = input_location;
2609 new_use->in_omp_scope = false;
2611 new_use->next = ent->uses;
2612 ent->uses = new_use;
2616 if (ent->in_try_scope || ent->in_catch_scope
2617 || ent->in_omp_scope || ent->bad_decls)
2619 permerror (input_location, "jump to label %q+D", decl);
2620 permerror (input_location, " from here");
2624 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2626 tree b = TREE_VALUE (bad);
2627 int u = decl_jump_unsafe (b);
2629 if (u > 1 && DECL_ARTIFICIAL (b))
2631 /* Can't skip init of __exception_info. */
2632 error ("%J enters catch block", b);
2636 error (" skips initialization of %q+#D", b);
2638 permerror (input_location, " enters scope of non-POD %q+#D", b);
2641 if (ent->in_try_scope)
2642 error (" enters try block");
2643 else if (ent->in_catch_scope && !saw_catch)
2644 error (" enters catch block");
2646 if (ent->in_omp_scope)
2647 error (" enters OpenMP structured block");
2648 else if (flag_openmp)
2650 struct cp_binding_level *b;
2651 for (b = current_binding_level; b ; b = b->level_chain)
2653 if (b == ent->binding_level)
2655 if (b->kind == sk_omp)
2659 permerror (input_location, "jump to label %q+D", decl);
2660 permerror (input_location, " from here");
2663 error (" exits OpenMP structured block");
2670 /* Check that a return is ok wrt OpenMP structured blocks.
2671 Called by finish_return_stmt. Returns true if all is well. */
2674 check_omp_return (void)
2676 struct cp_binding_level *b;
2677 for (b = current_binding_level; b ; b = b->level_chain)
2678 if (b->kind == sk_omp)
2680 error ("invalid exit from OpenMP structured block");
2686 /* Define a label, specifying the location in the source file.
2687 Return the LABEL_DECL node for the label. */
2690 define_label (location_t location, tree name)
2692 struct named_label_entry *ent, dummy;
2693 struct cp_binding_level *p;
2696 timevar_push (TV_NAME_LOOKUP);
2698 decl = lookup_label (name);
2700 dummy.label_decl = decl;
2701 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2702 gcc_assert (ent != NULL);
2704 /* After labels, make any new cleanups in the function go into their
2705 own new (temporary) binding contour. */
2706 for (p = current_binding_level;
2707 p->kind != sk_function_parms;
2709 p->more_cleanups_ok = 0;
2711 if (name == get_identifier ("wchar_t"))
2712 permerror (input_location, "label named wchar_t");
2714 if (DECL_INITIAL (decl) != NULL_TREE)
2716 error ("duplicate label %qD", decl);
2717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2721 struct named_label_use_entry *use;
2723 /* Mark label as having been defined. */
2724 DECL_INITIAL (decl) = error_mark_node;
2725 /* Say where in the source. */
2726 DECL_SOURCE_LOCATION (decl) = location;
2728 ent->binding_level = current_binding_level;
2729 ent->names_in_scope = current_binding_level->names;
2731 for (use = ent->uses; use ; use = use->next)
2732 check_previous_goto (decl, use);
2736 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2741 struct cp_binding_level *level;
2742 struct cp_switch *next;
2743 /* The SWITCH_STMT being built. */
2745 /* A splay-tree mapping the low element of a case range to the high
2746 element, or NULL_TREE if there is no high element. Used to
2747 determine whether or not a new case label duplicates an old case
2748 label. We need a tree, rather than simply a hash table, because
2749 of the GNU case range extension. */
2753 /* A stack of the currently active switch statements. The innermost
2754 switch statement is on the top of the stack. There is no need to
2755 mark the stack for garbage collection because it is only active
2756 during the processing of the body of a function, and we never
2757 collect at that point. */
2759 static struct cp_switch *switch_stack;
2761 /* Called right after a switch-statement condition is parsed.
2762 SWITCH_STMT is the switch statement being parsed. */
2765 push_switch (tree switch_stmt)
2767 struct cp_switch *p = XNEW (struct cp_switch);
2768 p->level = current_binding_level;
2769 p->next = switch_stack;
2770 p->switch_stmt = switch_stmt;
2771 p->cases = splay_tree_new (case_compare, NULL, NULL);
2778 struct cp_switch *cs = switch_stack;
2779 location_t switch_location;
2781 /* Emit warnings as needed. */
2782 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2783 switch_location = EXPR_LOCATION (cs->switch_stmt);
2785 switch_location = input_location;
2786 if (!processing_template_decl)
2787 c_do_switch_warnings (cs->cases, switch_location,
2788 SWITCH_STMT_TYPE (cs->switch_stmt),
2789 SWITCH_STMT_COND (cs->switch_stmt));
2791 splay_tree_delete (cs->cases);
2792 switch_stack = switch_stack->next;
2796 /* Note that we've seen a definition of a case label, and complain if this
2797 is a bad place for one. */
2800 finish_case_label (location_t loc, tree low_value, tree high_value)
2803 struct cp_binding_level *p;
2805 if (processing_template_decl)
2809 /* For templates, just add the case label; we'll do semantic
2810 analysis at instantiation-time. */
2811 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2812 return add_stmt (build_case_label (loc, low_value, high_value, label));
2815 /* Find the condition on which this switch statement depends. */
2816 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2817 if (cond && TREE_CODE (cond) == TREE_LIST)
2818 cond = TREE_VALUE (cond);
2820 if (!check_switch_goto (switch_stack->level))
2821 return error_mark_node;
2823 r = c_add_case_label (loc, switch_stack->cases, cond,
2824 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2825 low_value, high_value);
2827 /* After labels, make any new cleanups in the function go into their
2828 own new (temporary) binding contour. */
2829 for (p = current_binding_level;
2830 p->kind != sk_function_parms;
2832 p->more_cleanups_ok = 0;
2837 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2840 typename_hash (const void* k)
2843 const_tree const t = (const_tree) k;
2845 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2846 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2851 typedef struct typename_info {
2859 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2860 really of type `typename_info*' */
2863 typename_compare (const void * k1, const void * k2)
2865 const_tree const t1 = (const_tree) k1;
2866 const typename_info *const t2 = (const typename_info *) k2;
2868 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2869 && TYPE_CONTEXT (t1) == t2->scope
2870 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2871 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2872 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2875 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2876 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2878 Returns the new TYPENAME_TYPE. */
2880 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2883 build_typename_type (tree context, tree name, tree fullname,
2884 enum tag_types tag_type)
2892 if (typename_htab == NULL)
2893 typename_htab = htab_create_ggc (61, &typename_hash,
2894 &typename_compare, NULL);
2896 ti.scope = FROB_CONTEXT (context);
2898 ti.template_id = fullname;
2899 ti.enum_p = tag_type == enum_type;
2900 ti.class_p = (tag_type == class_type
2901 || tag_type == record_type
2902 || tag_type == union_type);
2903 hash = (htab_hash_pointer (ti.scope)
2904 ^ htab_hash_pointer (ti.name));
2906 /* See if we already have this type. */
2907 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2912 /* Build the TYPENAME_TYPE. */
2913 t = cxx_make_type (TYPENAME_TYPE);
2914 TYPE_CONTEXT (t) = ti.scope;
2915 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2916 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2917 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2919 /* Build the corresponding TYPE_DECL. */
2920 d = build_decl (input_location, TYPE_DECL, name, t);
2921 TYPE_NAME (TREE_TYPE (d)) = d;
2922 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2923 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2924 DECL_ARTIFICIAL (d) = 1;
2926 /* Store it in the hash table. */
2929 /* TYPENAME_TYPEs must always be compared structurally, because
2930 they may or may not resolve down to another type depending on
2931 the currently open classes. */
2932 SET_TYPE_STRUCTURAL_EQUALITY (t);
2938 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2939 provided to name the type. Returns an appropriate type, unless an
2940 error occurs, in which case error_mark_node is returned. If we
2941 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2942 return that, rather than the _TYPE it corresponds to, in other
2943 cases we look through the type decl. If TF_ERROR is set, complain
2944 about errors, otherwise be quiet. */
2947 make_typename_type (tree context, tree name, enum tag_types tag_type,
2948 tsubst_flags_t complain)
2954 if (name == error_mark_node
2955 || context == NULL_TREE
2956 || context == error_mark_node)
2957 return error_mark_node;
2961 if (!(TYPE_LANG_SPECIFIC (name)
2962 && (CLASSTYPE_IS_TEMPLATE (name)
2963 || CLASSTYPE_USE_TEMPLATE (name))))
2964 name = TYPE_IDENTIFIER (name);
2966 /* Create a TEMPLATE_ID_EXPR for the type. */
2967 name = build_nt (TEMPLATE_ID_EXPR,
2968 CLASSTYPE_TI_TEMPLATE (name),
2969 CLASSTYPE_TI_ARGS (name));
2971 else if (TREE_CODE (name) == TYPE_DECL)
2972 name = DECL_NAME (name);
2976 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2978 name = TREE_OPERAND (name, 0);
2979 if (TREE_CODE (name) == TEMPLATE_DECL)
2980 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2981 else if (TREE_CODE (name) == OVERLOAD)
2983 error ("%qD is not a type", name);
2984 return error_mark_node;
2987 if (TREE_CODE (name) == TEMPLATE_DECL)
2989 error ("%qD used without template parameters", name);
2990 return error_mark_node;
2992 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2993 gcc_assert (TYPE_P (context));
2995 if (!MAYBE_CLASS_TYPE_P (context))
2997 if (complain & tf_error)
2998 error ("%q#T is not a class", context);
2999 return error_mark_node;
3002 /* When the CONTEXT is a dependent type, NAME could refer to a
3003 dependent base class of CONTEXT. But look inside it anyway
3004 if CONTEXT is a currently open scope, in case it refers to a
3005 member of the current instantiation or a non-dependent base;
3006 lookup will stop when we hit a dependent base. */
3007 if (!dependent_scope_p (context))
3008 /* We should only set WANT_TYPE when we're a nested typename type.
3009 Then we can give better diagnostics if we find a non-type. */
3010 t = lookup_field (context, name, 0, /*want_type=*/true);
3014 if (!t && dependent_type_p (context))
3015 return build_typename_type (context, name, fullname, tag_type);
3017 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3021 if (complain & tf_error)
3022 error (want_template ? "no class template named %q#T in %q#T"
3023 : "no type named %q#T in %q#T", name, context);
3024 return error_mark_node;
3027 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3029 if (complain & tf_error)
3030 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3032 return error_mark_node;
3034 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3036 if (complain & tf_error)
3037 error ("%<typename %T::%D%> names %q#T, which is not a type",
3039 return error_mark_node;
3042 if (complain & tf_error)
3043 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3046 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3048 /*entering_scope=*/0,
3049 tf_warning_or_error | tf_user);
3051 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3057 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3058 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3059 in which case error_mark_node is returned.
3061 If PARM_LIST is non-NULL, also make sure that the template parameter
3062 list of TEMPLATE_DECL matches.
3064 If COMPLAIN zero, don't complain about any errors that occur. */
3067 make_unbound_class_template (tree context, tree name, tree parm_list,
3068 tsubst_flags_t complain)
3074 name = TYPE_IDENTIFIER (name);
3075 else if (DECL_P (name))
3076 name = DECL_NAME (name);
3077 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3079 if (!dependent_type_p (context)
3080 || currently_open_class (context))
3082 tree tmpl = NULL_TREE;
3084 if (MAYBE_CLASS_TYPE_P (context))
3085 tmpl = lookup_field (context, name, 0, false);
3087 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3089 if (complain & tf_error)
3090 error ("no class template named %q#T in %q#T", name, context);
3091 return error_mark_node;
3095 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3097 if (complain & tf_error)
3099 error ("template parameters do not match template");
3100 error ("%q+D declared here", tmpl);
3102 return error_mark_node;
3105 if (complain & tf_error)
3106 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3111 /* Build the UNBOUND_CLASS_TEMPLATE. */
3112 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3113 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3114 TREE_TYPE (t) = NULL_TREE;
3115 SET_TYPE_STRUCTURAL_EQUALITY (t);
3117 /* Build the corresponding TEMPLATE_DECL. */
3118 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3119 TYPE_NAME (TREE_TYPE (d)) = d;
3120 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3121 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3122 DECL_ARTIFICIAL (d) = 1;
3123 DECL_TEMPLATE_PARMS (d) = parm_list;
3130 /* Push the declarations of builtin types into the namespace.
3131 RID_INDEX is the index of the builtin type in the array
3132 RID_POINTERS. NAME is the name used when looking up the builtin
3133 type. TYPE is the _TYPE node for the builtin type. */
3136 record_builtin_type (enum rid rid_index,
3140 tree rname = NULL_TREE, tname = NULL_TREE;
3141 tree tdecl = NULL_TREE;
3143 if ((int) rid_index < (int) RID_MAX)
3144 rname = ridpointers[(int) rid_index];
3146 tname = get_identifier (name);
3148 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3149 eliminated. Built-in types should not be looked up name; their
3150 names are keywords that the parser can recognize. However, there
3151 is code in c-common.c that uses identifier_global_value to look
3152 up built-in types by name. */
3155 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3156 DECL_ARTIFICIAL (tdecl) = 1;
3157 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3163 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3164 DECL_ARTIFICIAL (tdecl) = 1;
3166 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3169 if (!TYPE_NAME (type))
3170 TYPE_NAME (type) = tdecl;
3173 debug_hooks->type_decl (tdecl, 0);
3176 /* Record one of the standard Java types.
3177 * Declare it as having the given NAME.
3178 * If SIZE > 0, it is the size of one of the integral types;
3179 * otherwise it is the negative of the size of one of the other types. */
3182 record_builtin_java_type (const char* name, int size)
3186 type = build_nonstandard_integer_type (size, 0);
3187 else if (size > -32)
3190 /* "__java_char" or ""__java_boolean". */
3191 type = build_nonstandard_integer_type (-size, 1);
3192 /* Get the signed type cached and attached to the unsigned type,
3193 so it doesn't get garbage-collected at "random" times,
3194 causing potential codegen differences out of different UIDs
3195 and different alias set numbers. */
3196 stype = build_nonstandard_integer_type (-size, 0);
3197 TREE_CHAIN (type) = stype;
3198 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3201 { /* "__java_float" or ""__java_double". */
3202 type = make_node (REAL_TYPE);
3203 TYPE_PRECISION (type) = - size;
3206 record_builtin_type (RID_MAX, name, type);
3207 decl = TYPE_NAME (type);
3209 /* Suppress generate debug symbol entries for these types,
3210 since for normal C++ they are just clutter.
3211 However, push_lang_context undoes this if extern "Java" is seen. */
3212 DECL_IGNORED_P (decl) = 1;
3214 TYPE_FOR_JAVA (type) = 1;
3218 /* Push a type into the namespace so that the back ends ignore it. */
3221 record_unknown_type (tree type, const char* name)
3223 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3224 TYPE_DECL, get_identifier (name), type));
3225 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3226 DECL_IGNORED_P (decl) = 1;
3227 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3228 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3229 TYPE_ALIGN (type) = 1;
3230 TYPE_USER_ALIGN (type) = 0;
3231 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3234 /* A string for which we should create an IDENTIFIER_NODE at
3237 typedef struct predefined_identifier
3239 /* The name of the identifier. */
3240 const char *const name;
3241 /* The place where the IDENTIFIER_NODE should be stored. */
3243 /* Nonzero if this is the name of a constructor or destructor. */
3244 const int ctor_or_dtor_p;
3245 } predefined_identifier;
3247 /* Create all the predefined identifiers. */
3250 initialize_predefined_identifiers (void)
3252 const predefined_identifier *pid;
3254 /* A table of identifiers to create at startup. */
3255 static const predefined_identifier predefined_identifiers[] = {
3256 { "C++", &lang_name_cplusplus, 0 },
3257 { "C", &lang_name_c, 0 },
3258 { "Java", &lang_name_java, 0 },
3259 /* Some of these names have a trailing space so that it is
3260 impossible for them to conflict with names written by users. */
3261 { "__ct ", &ctor_identifier, 1 },
3262 { "__base_ctor ", &base_ctor_identifier, 1 },
3263 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3264 { "__dt ", &dtor_identifier, 1 },
3265 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3266 { "__base_dtor ", &base_dtor_identifier, 1 },
3267 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3268 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3269 { "nelts", &nelts_identifier, 0 },
3270 { THIS_NAME, &this_identifier, 0 },
3271 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3272 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3273 { "_vptr", &vptr_identifier, 0 },
3274 { "__vtt_parm", &vtt_parm_identifier, 0 },
3275 { "::", &global_scope_name, 0 },
3276 { "std", &std_identifier, 0 },
3280 for (pid = predefined_identifiers; pid->name; ++pid)
3282 *pid->node = get_identifier (pid->name);
3283 if (pid->ctor_or_dtor_p)
3284 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3288 /* Create the predefined scalar types of C,
3289 and some nodes representing standard constants (0, 1, (void *)0).
3290 Initialize the global binding level.
3291 Make definitions for built-in primitive functions. */
3294 cxx_init_decl_processing (void)
3297 tree void_ftype_ptr;
3299 build_common_tree_nodes (flag_signed_char, false);
3301 /* Create all the identifiers we need. */
3302 initialize_predefined_identifiers ();
3304 /* Create the global variables. */
3305 push_to_top_level ();
3307 current_function_decl = NULL_TREE;
3308 current_binding_level = NULL;
3309 /* Enter the global namespace. */
3310 gcc_assert (global_namespace == NULL_TREE);
3311 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3313 TREE_PUBLIC (global_namespace) = 1;
3314 begin_scope (sk_namespace, global_namespace);
3316 current_lang_name = NULL_TREE;
3318 if (flag_visibility_ms_compat)
3319 default_visibility = VISIBILITY_HIDDEN;
3322 current_lang_name = lang_name_c;
3324 /* Create the `std' namespace. */
3325 push_namespace (std_identifier);
3326 std_node = current_namespace;
3329 c_common_nodes_and_builtins ();
3331 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3332 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3333 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3334 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3335 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3336 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3337 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3338 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3340 integer_two_node = build_int_cst (NULL_TREE, 2);
3341 integer_three_node = build_int_cst (NULL_TREE, 3);
3343 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3344 truthvalue_type_node = boolean_type_node;
3345 truthvalue_false_node = boolean_false_node;
3346 truthvalue_true_node = boolean_true_node;
3348 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3351 record_builtin_type (RID_MAX, NULL, string_type_node);
3354 delta_type_node = ptrdiff_type_node;
3355 vtable_index_type = ptrdiff_type_node;
3357 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3358 void_ftype = build_function_type (void_type_node, void_list_node);
3359 void_ftype_ptr = build_function_type (void_type_node,
3360 tree_cons (NULL_TREE,
3364 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3366 /* C++ extensions */
3368 unknown_type_node = make_node (UNKNOWN_TYPE);
3369 record_unknown_type (unknown_type_node, "unknown type");
3371 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3372 TREE_TYPE (unknown_type_node) = unknown_type_node;
3374 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3376 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3377 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3379 init_list_type_node = make_node (UNKNOWN_TYPE);
3380 record_unknown_type (init_list_type_node, "init list");
3383 /* Make sure we get a unique function type, so we can give
3384 its pointer type a name. (This wins for gdb.) */
3385 tree vfunc_type = make_node (FUNCTION_TYPE);
3386 TREE_TYPE (vfunc_type) = integer_type_node;
3387 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3388 layout_type (vfunc_type);
3390 vtable_entry_type = build_pointer_type (vfunc_type);
3392 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3395 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3396 layout_type (vtbl_type_node);
3397 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3398 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3399 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3400 layout_type (vtbl_ptr_type_node);
3401 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3403 push_namespace (get_identifier ("__cxxabiv1"));
3404 abi_node = current_namespace;
3407 global_type_node = make_node (LANG_TYPE);
3408 record_unknown_type (global_type_node, "global type");
3411 current_lang_name = lang_name_cplusplus;
3415 tree bad_alloc_type_node;
3416 tree bad_alloc_decl;
3417 tree newtype, deltype;
3418 tree ptr_ftype_sizetype;
3420 push_namespace (std_identifier);
3421 bad_alloc_id = get_identifier ("bad_alloc");
3422 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3423 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3425 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3426 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3427 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3431 = build_function_type (ptr_type_node,
3432 tree_cons (NULL_TREE,
3435 newtype = build_exception_variant
3436 (ptr_ftype_sizetype, add_exception_specifier
3437 (NULL_TREE, bad_alloc_type_node, -1));
3438 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3439 push_cp_library_fn (NEW_EXPR, newtype);
3440 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3441 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3442 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3446 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3448 /* Perform other language dependent initializations. */
3449 init_class_processing ();
3450 init_rtti_processing ();
3452 if (flag_exceptions)
3453 init_exception_processing ();
3455 if (! supports_one_only ())
3458 make_fname_decl = cp_make_fname_decl;
3459 start_fname_decls ();
3461 /* Show we use EH for cleanups. */
3462 if (flag_exceptions)
3463 using_eh_for_cleanups ();
3466 /* Generate an initializer for a function naming variable from
3467 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3468 filled in with the type of the init. */
3471 cp_fname_init (const char* name, tree *type_p)
3473 tree domain = NULL_TREE;
3475 tree init = NULL_TREE;
3480 length = strlen (name);
3481 domain = build_index_type (size_int (length));
3482 init = build_string (length + 1, name);
3485 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3486 type = build_cplus_array_type (type, domain);
3491 TREE_TYPE (init) = type;
3493 init = error_mark_node;
3498 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3499 the decl, LOC is the location to give the decl, NAME is the
3500 initialization string and TYPE_DEP indicates whether NAME depended
3501 on the type of the function. We make use of that to detect
3502 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3503 at the point of first use, so we mustn't push the decl now. */
3506 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3508 const char *const name = (type_dep && processing_template_decl
3509 ? NULL : fname_as_string (type_dep));
3511 tree init = cp_fname_init (name, &type);
3512 tree decl = build_decl (loc, VAR_DECL, id, type);
3515 free (CONST_CAST (char *, name));
3517 /* As we're using pushdecl_with_scope, we must set the context. */
3518 DECL_CONTEXT (decl) = current_function_decl;
3519 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3521 TREE_STATIC (decl) = 1;
3522 TREE_READONLY (decl) = 1;
3523 DECL_ARTIFICIAL (decl) = 1;
3525 TREE_USED (decl) = 1;
3527 if (current_function_decl)
3529 struct cp_binding_level *b = current_binding_level;
3530 while (b->level_chain->kind != sk_function_parms)
3532 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3533 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3534 LOOKUP_ONLYCONVERTING);
3537 pushdecl_top_level_and_finish (decl, init);
3543 builtin_function_1 (tree decl, tree context, bool is_global)
3545 tree id = DECL_NAME (decl);
3546 const char *name = IDENTIFIER_POINTER (id);
3548 retrofit_lang_decl (decl);
3550 /* All nesting of C++ functions is lexical; there is never a "static
3551 chain" in the sense of GNU C nested functions. */
3552 DECL_NO_STATIC_CHAIN (decl) = 1;
3554 DECL_ARTIFICIAL (decl) = 1;
3555 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3556 SET_DECL_LANGUAGE (decl, lang_c);
3557 /* Runtime library routines are, by definition, available in an
3558 external shared object. */
3559 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3560 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3562 DECL_CONTEXT (decl) = context;
3565 pushdecl_top_level (decl);
3569 /* A function in the user's namespace should have an explicit
3570 declaration before it is used. Mark the built-in function as
3571 anticipated but not actually declared. */
3572 if (name[0] != '_' || name[1] != '_')
3573 DECL_ANTICIPATED (decl) = 1;
3574 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3576 size_t len = strlen (name);
3578 /* Treat __*_chk fortification functions as anticipated as well,
3579 unless they are __builtin_*. */
3580 if (len > strlen ("___chk")
3581 && memcmp (name + len - strlen ("_chk"),
3582 "_chk", strlen ("_chk") + 1) == 0)
3583 DECL_ANTICIPATED (decl) = 1;
3590 cxx_builtin_function (tree decl)
3592 tree id = DECL_NAME (decl);
3593 const char *name = IDENTIFIER_POINTER (id);
3594 /* All builtins that don't begin with an '_' should additionally
3595 go in the 'std' namespace. */
3598 tree decl2 = copy_node(decl);
3599 push_namespace (std_identifier);
3600 builtin_function_1 (decl2, std_node, false);
3604 return builtin_function_1 (decl, NULL_TREE, false);
3607 /* Like cxx_builtin_function, but guarantee the function is added to the global
3608 scope. This is to allow function specific options to add new machine
3609 dependent builtins when the target ISA changes via attribute((target(...)))
3610 which saves space on program startup if the program does not use non-generic
3614 cxx_builtin_function_ext_scope (tree decl)
3617 tree id = DECL_NAME (decl);
3618 const char *name = IDENTIFIER_POINTER (id);
3619 /* All builtins that don't begin with an '_' should additionally
3620 go in the 'std' namespace. */
3623 tree decl2 = copy_node(decl);
3624 push_namespace (std_identifier);
3625 builtin_function_1 (decl2, std_node, true);
3629 return builtin_function_1 (decl, NULL_TREE, true);
3632 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3633 function. Not called directly. */
3636 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3638 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3639 DECL_EXTERNAL (fn) = 1;
3640 TREE_PUBLIC (fn) = 1;
3641 DECL_ARTIFICIAL (fn) = 1;
3642 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3643 SET_DECL_LANGUAGE (fn, lang_c);
3644 /* Runtime library routines are, by definition, available in an
3645 external shared object. */
3646 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3647 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3651 /* Returns the _DECL for a library function with C linkage.
3652 We assume that such functions never throw; if this is incorrect,
3653 callers should unset TREE_NOTHROW. */
3656 build_library_fn (tree name, tree type)
3658 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3659 TREE_NOTHROW (fn) = 1;
3663 /* Returns the _DECL for a library function with C++ linkage. */
3666 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3668 tree fn = build_library_fn_1 (name, operator_code, type);
3669 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3670 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3671 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3675 /* Like build_library_fn, but takes a C string instead of an
3679 build_library_fn_ptr (const char* name, tree type)
3681 return build_library_fn (get_identifier (name), type);
3684 /* Like build_cp_library_fn, but takes a C string instead of an
3688 build_cp_library_fn_ptr (const char* name, tree type)
3690 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3693 /* Like build_library_fn, but also pushes the function so that we will
3694 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3695 may throw exceptions listed in RAISES. */
3698 push_library_fn (tree name, tree type, tree raises)
3703 type = build_exception_variant (type, raises);
3705 fn = build_library_fn (name, type);
3706 pushdecl_top_level (fn);
3710 /* Like build_cp_library_fn, but also pushes the function so that it
3711 will be found by normal lookup. */
3714 push_cp_library_fn (enum tree_code operator_code, tree type)
3716 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3723 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3727 push_void_library_fn (tree name, tree parmtypes)
3729 tree type = build_function_type (void_type_node, parmtypes);
3730 return push_library_fn (name, type, NULL_TREE);
3733 /* Like push_library_fn, but also note that this function throws
3734 and does not return. Used for __throw_foo and the like. */
3737 push_throw_library_fn (tree name, tree type)
3739 tree fn = push_library_fn (name, type, NULL_TREE);
3740 TREE_THIS_VOLATILE (fn) = 1;
3741 TREE_NOTHROW (fn) = 0;
3745 /* When we call finish_struct for an anonymous union, we create
3746 default copy constructors and such. But, an anonymous union
3747 shouldn't have such things; this function undoes the damage to the
3748 anonymous union type T.
3750 (The reason that we create the synthesized methods is that we don't
3751 distinguish `union { int i; }' from `typedef union { int i; } U'.
3752 The first is an anonymous union; the second is just an ordinary
3756 fixup_anonymous_aggr (tree t)
3760 /* Wipe out memory of synthesized methods. */
3761 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3762 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3763 TYPE_HAS_INIT_REF (t) = 0;
3764 TYPE_HAS_CONST_INIT_REF (t) = 0;
3765 TYPE_HAS_ASSIGN_REF (t) = 0;
3766 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3768 /* Splice the implicitly generated functions out of the TYPE_METHODS
3770 q = &TYPE_METHODS (t);
3773 if (DECL_ARTIFICIAL (*q))
3774 *q = TREE_CHAIN (*q);
3776 q = &TREE_CHAIN (*q);
3779 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3780 if (TYPE_METHODS (t))
3782 tree decl = TYPE_MAIN_DECL (t);
3784 if (TREE_CODE (t) != UNION_TYPE)
3785 error ("%Jan anonymous struct cannot have function members", decl);
3787 error ("%Jan anonymous union cannot have function members", decl);
3790 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3791 assignment operators (because they cannot have these methods themselves).
3792 For anonymous unions this is already checked because they are not allowed
3793 in any union, otherwise we have to check it. */
3794 if (TREE_CODE (t) != UNION_TYPE)
3798 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3799 if (TREE_CODE (field) == FIELD_DECL)
3801 type = TREE_TYPE (field);
3802 if (CLASS_TYPE_P (type))
3804 if (TYPE_NEEDS_CONSTRUCTING (type))
3805 error ("member %q+#D with constructor not allowed "
3806 "in anonymous aggregate", field);
3807 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3808 error ("member %q+#D with destructor not allowed "
3809 "in anonymous aggregate", field);
3810 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3811 error ("member %q+#D with copy assignment operator "
3812 "not allowed in anonymous aggregate", field);
3818 /* Make sure that a declaration with no declarator is well-formed, i.e.
3819 just declares a tagged type or anonymous union.
3821 Returns the type declared; or NULL_TREE if none. */
3824 check_tag_decl (cp_decl_specifier_seq *declspecs)
3826 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3827 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3828 /* If a class, struct, or enum type is declared by the DECLSPECS
3829 (i.e, if a class-specifier, enum-specifier, or non-typename
3830 elaborated-type-specifier appears in the DECLSPECS),
3831 DECLARED_TYPE is set to the corresponding type. */
3832 tree declared_type = NULL_TREE;
3833 bool error_p = false;
3835 if (declspecs->multiple_types_p)
3836 error ("multiple types in one declaration");
3837 else if (declspecs->redefined_builtin_type)
3839 if (!in_system_header)
3840 permerror (input_location, "redeclaration of C++ built-in type %qT",
3841 declspecs->redefined_builtin_type);
3846 && TYPE_P (declspecs->type)
3847 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3848 && MAYBE_CLASS_TYPE_P (declspecs->type))
3849 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3850 declared_type = declspecs->type;
3851 else if (declspecs->type == error_mark_node)
3853 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3854 permerror (input_location, "declaration does not declare anything");
3855 /* Check for an anonymous union. */
3856 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3857 && TYPE_ANONYMOUS_P (declared_type))
3859 /* 7/3 In a simple-declaration, the optional init-declarator-list
3860 can be omitted only when declaring a class (clause 9) or
3861 enumeration (7.2), that is, when the decl-specifier-seq contains
3862 either a class-specifier, an elaborated-type-specifier with
3863 a class-key (9.1), or an enum-specifier. In these cases and
3864 whenever a class-specifier or enum-specifier is present in the
3865 decl-specifier-seq, the identifiers in these specifiers are among
3866 the names being declared by the declaration (as class-name,
3867 enum-names, or enumerators, depending on the syntax). In such
3868 cases, and except for the declaration of an unnamed bit-field (9.6),
3869 the decl-specifier-seq shall introduce one or more names into the
3870 program, or shall redeclare a name introduced by a previous
3871 declaration. [Example:
3872 enum { }; // ill-formed
3873 typedef class { }; // ill-formed
3877 error ("missing type-name in typedef-declaration");
3880 /* Anonymous unions are objects, so they can have specifiers. */;
3881 SET_ANON_AGGR_TYPE_P (declared_type);
3883 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3884 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3889 if (declspecs->specs[(int)ds_inline]
3890 || declspecs->specs[(int)ds_virtual])
3891 error ("%qs can only be specified for functions",
3892 declspecs->specs[(int)ds_inline]
3893 ? "inline" : "virtual");
3895 && (!current_class_type
3896 || current_scope () != current_class_type))
3897 error ("%<friend%> can only be specified inside a class");
3898 else if (declspecs->specs[(int)ds_explicit])
3899 error ("%<explicit%> can only be specified for constructors");
3900 else if (declspecs->storage_class)
3901 error ("a storage class can only be specified for objects "
3903 else if (declspecs->specs[(int)ds_const]
3904 || declspecs->specs[(int)ds_volatile]
3905 || declspecs->specs[(int)ds_restrict]
3906 || declspecs->specs[(int)ds_thread])
3907 error ("qualifiers can only be specified for objects "
3909 else if (saw_typedef)
3910 warning (0, "%<typedef%> was ignored in this declaration");
3913 return declared_type;
3916 /* Called when a declaration is seen that contains no names to declare.
3917 If its type is a reference to a structure, union or enum inherited
3918 from a containing scope, shadow that tag name for the current scope
3919 with a forward reference.
3920 If its type defines a new named structure or union
3921 or defines an enum, it is valid but we need not do anything here.
3922 Otherwise, it is an error.
3924 C++: may have to grok the declspecs to learn about static,
3925 complain for anonymous unions.
3927 Returns the TYPE declared -- or NULL_TREE if none. */
3930 shadow_tag (cp_decl_specifier_seq *declspecs)
3932 tree t = check_tag_decl (declspecs);
3937 if (declspecs->attributes)
3939 warning (0, "attribute ignored in declaration of %q+#T", t);
3940 warning (0, "attribute for %q+#T must follow the %qs keyword",
3941 t, class_key_or_enum_as_string (t));
3945 if (maybe_process_partial_specialization (t) == error_mark_node)
3948 /* This is where the variables in an anonymous union are
3949 declared. An anonymous union declaration looks like:
3951 because there is no declarator after the union, the parser
3952 sends that declaration here. */
3953 if (ANON_AGGR_TYPE_P (t))
3955 fixup_anonymous_aggr (t);
3957 if (TYPE_FIELDS (t))
3959 tree decl = grokdeclarator (/*declarator=*/NULL,
3960 declspecs, NORMAL, 0, NULL);
3961 finish_anon_union (decl);
3968 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3971 groktypename (cp_decl_specifier_seq *type_specifiers,
3972 const cp_declarator *declarator,
3973 bool is_template_arg)
3977 enum decl_context context
3978 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3979 attrs = type_specifiers->attributes;
3980 type_specifiers->attributes = NULL_TREE;
3981 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3982 if (attrs && type != error_mark_node)
3984 if (CLASS_TYPE_P (type))
3985 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3986 "outside of definition", type);
3987 else if (MAYBE_CLASS_TYPE_P (type))
3988 /* A template type parameter or other dependent type. */
3989 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
3990 "type %qT without an associated declaration", type);
3992 cplus_decl_attributes (&type, attrs, 0);
3997 /* Process a DECLARATOR for a function-scope variable declaration,
3998 namespace-scope variable declaration, or function declaration.
3999 (Function definitions go through start_function; class member
4000 declarations appearing in the body of the class go through
4001 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4002 If an error occurs, the error_mark_node is returned instead.
4004 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4005 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4006 for an explicitly defaulted function, or SD_DELETED for an explicitly
4007 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4008 implicitly initialized via a default constructor. ATTRIBUTES and
4009 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4010 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4011 set, the caller is responsible for calling pop_scope. */
4014 start_decl (const cp_declarator *declarator,
4015 cp_decl_specifier_seq *declspecs,
4018 tree prefix_attributes,
4019 tree *pushed_scope_p)
4027 *pushed_scope_p = NULL_TREE;
4029 /* An object declared as __attribute__((deprecated)) suppresses
4030 warnings of uses of other deprecated items. */
4031 if (lookup_attribute ("deprecated", attributes))
4032 deprecated_state = DEPRECATED_SUPPRESS;
4034 attributes = chainon (attributes, prefix_attributes);
4036 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4039 deprecated_state = DEPRECATED_NORMAL;
4041 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4042 || decl == error_mark_node)
4043 return error_mark_node;
4045 type = TREE_TYPE (decl);
4047 context = DECL_CONTEXT (decl);
4051 *pushed_scope_p = push_scope (context);
4053 /* We are only interested in class contexts, later. */
4054 if (TREE_CODE (context) == NAMESPACE_DECL)
4055 context = NULL_TREE;
4059 /* Is it valid for this decl to have an initializer at all?
4060 If not, set INITIALIZED to zero, which will indirectly
4061 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4062 switch (TREE_CODE (decl))
4065 error ("typedef %qD is initialized (use decltype instead)", decl);
4066 return error_mark_node;
4069 if (initialized == SD_DELETED)
4070 /* We'll handle the rest of the semantics later, but we need to
4071 set this now so it's visible to duplicate_decls. */
4072 DECL_DELETED_FN (decl) = 1;
4081 if (! toplevel_bindings_p ()
4082 && DECL_EXTERNAL (decl))
4083 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4085 DECL_EXTERNAL (decl) = 0;
4086 if (toplevel_bindings_p ())
4087 TREE_STATIC (decl) = 1;
4090 /* If this is a typedef that names the class for linkage purposes
4091 (7.1.3p8), apply any attributes directly to the type. */
4092 if (TREE_CODE (decl) == TYPE_DECL
4093 && TAGGED_TYPE_P (TREE_TYPE (decl))
4094 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4095 flags = ATTR_FLAG_TYPE_IN_PLACE;
4099 /* Set attributes here so if duplicate decl, will have proper attributes. */
4100 cplus_decl_attributes (&decl, attributes, flags);
4102 /* Dllimported symbols cannot be defined. Static data members (which
4103 can be initialized in-class and dllimported) go through grokfield,
4104 not here, so we don't need to exclude those decls when checking for
4106 if (initialized && DECL_DLLIMPORT_P (decl))
4108 error ("definition of %q#D is marked %<dllimport%>", decl);
4109 DECL_DLLIMPORT_P (decl) = 0;
4112 /* If #pragma weak was used, mark the decl weak now. */
4113 maybe_apply_pragma_weak (decl);
4115 if (TREE_CODE (decl) == FUNCTION_DECL
4116 && DECL_DECLARED_INLINE_P (decl)
4117 && DECL_UNINLINABLE (decl)
4118 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4119 warning (0, "inline function %q+D given attribute noinline", decl);
4121 if (context && COMPLETE_TYPE_P (complete_type (context)))
4123 if (TREE_CODE (decl) == VAR_DECL)
4125 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4126 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4127 error ("%q#D is not a static member of %q#T", decl, context);
4130 if (DECL_CONTEXT (field) != context)
4132 if (!same_type_p (DECL_CONTEXT (field), context))
4133 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4134 "to be defined as %<%T::%D%>",
4135 DECL_CONTEXT (field), DECL_NAME (decl),
4136 context, DECL_NAME (decl));
4137 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4139 if (processing_specialization
4140 && template_class_depth (context) == 0
4141 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4142 error ("template header not allowed in member definition "
4143 "of explicitly specialized class");
4144 /* Static data member are tricky; an in-class initialization
4145 still doesn't provide a definition, so the in-class
4146 declaration will have DECL_EXTERNAL set, but will have an
4147 initialization. Thus, duplicate_decls won't warn
4148 about this situation, and so we check here. */
4149 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4150 error ("duplicate initialization of %qD", decl);
4151 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4157 tree field = check_classfn (context, decl,
4158 (processing_template_decl
4159 > template_class_depth (context))
4160 ? current_template_parms
4162 if (field && field != error_mark_node
4163 && duplicate_decls (decl, field,
4164 /*newdecl_is_friend=*/false))
4168 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4169 DECL_IN_AGGR_P (decl) = 0;
4170 /* Do not mark DECL as an explicit specialization if it was not
4171 already marked as an instantiation; a declaration should
4172 never be marked as a specialization unless we know what
4173 template is being specialized. */
4174 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4176 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4178 /* [temp.expl.spec] An explicit specialization of a static data
4179 member of a template is a definition if the declaration
4180 includes an initializer; otherwise, it is a declaration.
4182 We check for processing_specialization so this only applies
4183 to the new specialization syntax. */
4184 if (!initialized && processing_specialization)
4185 DECL_EXTERNAL (decl) = 1;
4188 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4189 permerror (input_location, "declaration of %q#D outside of class is not definition",
4193 was_public = TREE_PUBLIC (decl);
4195 /* Enter this declaration into the symbol table. */
4196 decl = maybe_push_decl (decl);
4198 if (processing_template_decl)
4199 decl = push_template_decl (decl);
4200 if (decl == error_mark_node)
4201 return error_mark_node;
4203 /* Tell the back end to use or not use .common as appropriate. If we say
4204 -fconserve-space, we want this to save .data space, at the expense of
4205 wrong semantics. If we say -fno-conserve-space, we want this to
4206 produce errors about redefs; to do this we force variables into the
4208 if (flag_conserve_space
4209 && TREE_CODE (decl) == VAR_DECL
4210 && TREE_PUBLIC (decl)
4211 && !DECL_THREAD_LOCAL_P (decl)
4212 && !have_global_bss_p ())
4213 DECL_COMMON (decl) = 1;
4215 if (TREE_CODE (decl) == VAR_DECL
4216 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4217 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4219 /* This is a const variable with implicit 'static'. Set
4220 DECL_THIS_STATIC so we can tell it from variables that are
4221 !TREE_PUBLIC because of the anonymous namespace. */
4222 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4223 DECL_THIS_STATIC (decl) = 1;
4226 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4227 start_decl_1 (decl, initialized);
4232 /* Process the declaration of a variable DECL. INITIALIZED is true
4233 iff DECL is explicitly initialized. (INITIALIZED is false if the
4234 variable is initialized via an implicitly-called constructor.)
4235 This function must be called for ordinary variables (including, for
4236 example, implicit instantiations of templates), but must not be
4237 called for template declarations. */
4240 start_decl_1 (tree decl, bool initialized)
4244 bool aggregate_definition_p;
4246 gcc_assert (!processing_template_decl);
4248 if (error_operand_p (decl))
4251 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4253 type = TREE_TYPE (decl);
4254 complete_p = COMPLETE_TYPE_P (type);
4255 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4257 /* If an explicit initializer is present, or if this is a definition
4258 of an aggregate, then we need a complete type at this point.
4259 (Scalars are always complete types, so there is nothing to
4260 check.) This code just sets COMPLETE_P; errors (if necessary)
4261 are issued below. */
4262 if ((initialized || aggregate_definition_p)
4264 && COMPLETE_TYPE_P (complete_type (type)))
4267 /* We will not yet have set TREE_READONLY on DECL if the type
4268 was "const", but incomplete, before this point. But, now, we
4269 have a complete type, so we can try again. */
4270 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4274 /* Is it valid for this decl to have an initializer at all? */
4276 /* Don't allow initializations for incomplete types except for
4277 arrays which might be completed by the initialization. */
4279 ; /* A complete type is ok. */
4280 else if (type_uses_auto (type))
4281 ; /* An auto type is ok. */
4282 else if (TREE_CODE (type) != ARRAY_TYPE)
4284 error ("variable %q#D has initializer but incomplete type", decl);
4285 type = TREE_TYPE (decl) = error_mark_node;
4287 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4289 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4290 error ("elements of array %q#D have incomplete type", decl);
4291 /* else we already gave an error in start_decl. */
4294 else if (aggregate_definition_p && !complete_p)
4296 if (type_uses_auto (type))
4297 error ("declaration of %q#D has no initializer", decl);
4299 error ("aggregate %q#D has incomplete type and cannot be defined",
4301 /* Change the type so that assemble_variable will give
4302 DECL an rtl we can live with: (mem (const_int 0)). */
4303 type = TREE_TYPE (decl) = error_mark_node;
4306 /* Create a new scope to hold this declaration if necessary.
4307 Whether or not a new scope is necessary cannot be determined
4308 until after the type has been completed; if the type is a
4309 specialization of a class template it is not until after
4310 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4311 will be set correctly. */
4312 maybe_push_cleanup_level (type);
4315 /* Handle initialization of references. DECL, TYPE, and INIT have the
4316 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4317 but will be set to a new CLEANUP_STMT if a temporary is created
4318 that must be destroyed subsequently.
4320 Returns an initializer expression to use to initialize DECL, or
4321 NULL if the initialization can be performed statically.
4323 Quotes on semantics can be found in ARM 8.4.3. */
4326 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4330 if (init == NULL_TREE)
4332 if ((DECL_LANG_SPECIFIC (decl) == 0
4333 || DECL_IN_AGGR_P (decl) == 0)
4334 && ! DECL_THIS_EXTERN (decl))
4335 error ("%qD declared as reference but not initialized", decl);
4339 if (TREE_CODE (init) == CONSTRUCTOR)
4341 error ("ISO C++ forbids use of initializer list to "
4342 "initialize reference %qD", decl);
4346 if (TREE_CODE (init) == TREE_LIST)
4347 init = build_x_compound_expr_from_list (init, "initializer");
4349 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4350 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4351 /* Note: default conversion is only called in very special cases. */
4352 init = decay_conversion (init);
4354 /* Convert INIT to the reference type TYPE. This may involve the
4355 creation of a temporary, whose lifetime must be the same as that
4356 of the reference. If so, a DECL_EXPR for the temporary will be
4357 added just after the DECL_EXPR for DECL. That's why we don't set
4358 DECL_INITIAL for local references (instead assigning to them
4359 explicitly); we need to allow the temporary to be initialized
4361 tmp = initialize_reference (type, init, decl, cleanup);
4363 if (tmp == error_mark_node)
4365 else if (tmp == NULL_TREE)
4367 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4371 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4374 DECL_INITIAL (decl) = tmp;
4379 /* Subroutine of check_initializer. We're initializing a DECL of
4380 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4381 extend the lifetime of the underlying array to match that of the decl,
4382 just like for reference initialization. CLEANUP is as for
4383 grok_reference_init. */
4386 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4388 tree aggr_init, array, arrtype;
4389 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4390 aggr_init = TARGET_EXPR_INITIAL (init);
4391 init = build2 (INIT_EXPR, type, decl, init);
4393 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4394 arrtype = TREE_TYPE (array);
4396 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4397 array = TREE_OPERAND (array, 0);
4398 /* If the array is constant, finish_compound_literal already made it a
4399 static variable and we don't need to do anything here. */
4400 if (decl && TREE_CODE (array) == TARGET_EXPR)
4403 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4404 var = build_address (var);
4405 var = convert (arrtype, var);
4406 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4407 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4412 /* Designated initializers in arrays are not supported in GNU C++.
4413 The parser cannot detect this error since it does not know whether
4414 a given brace-enclosed initializer is for a class type or for an
4415 array. This function checks that CE does not use a designated
4416 initializer. If it does, an error is issued. Returns true if CE
4417 is valid, i.e., does not have a designated initializer. */
4420 check_array_designated_initializer (const constructor_elt *ce)
4422 /* Designated initializers for array elements are not supported. */
4425 /* The parser only allows identifiers as designated
4427 if (ce->index == error_mark_node)
4428 error ("name used in a GNU-style designated "
4429 "initializer for an array");
4432 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4433 error ("name %qD used in a GNU-style designated "
4434 "initializer for an array", ce->index);
4442 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4443 array until we finish parsing the initializer. If that's the
4444 situation we're in, update DECL accordingly. */
4447 maybe_deduce_size_from_array_init (tree decl, tree init)
4449 tree type = TREE_TYPE (decl);
4451 if (TREE_CODE (type) == ARRAY_TYPE
4452 && TYPE_DOMAIN (type) == NULL_TREE
4453 && TREE_CODE (decl) != TYPE_DECL)
4455 /* do_default is really a C-ism to deal with tentative definitions.
4456 But let's leave it here to ease the eventual merge. */
4457 int do_default = !DECL_EXTERNAL (decl);
4458 tree initializer = init ? init : DECL_INITIAL (decl);
4461 /* Check that there are no designated initializers in INIT, as
4462 those are not supported in GNU C++, and as the middle-end
4463 will crash if presented with a non-numeric designated
4465 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4467 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4468 constructor_elt *ce;
4471 VEC_iterate (constructor_elt, v, i, ce);
4473 if (!check_array_designated_initializer (ce))
4479 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4483 error ("initializer fails to determine size of %qD", decl);
4484 TREE_TYPE (decl) = error_mark_node;
4486 else if (failure == 2)
4490 error ("array size missing in %qD", decl);
4491 TREE_TYPE (decl) = error_mark_node;
4493 /* If a `static' var's size isn't known, make it extern as
4494 well as static, so it does not get allocated. If it's not
4495 `static', then don't mark it extern; finish_incomplete_decl
4496 will give it a default size and it will get allocated. */
4497 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4498 DECL_EXTERNAL (decl) = 1;
4500 else if (failure == 3)
4502 error ("zero-size array %qD", decl);
4503 TREE_TYPE (decl) = error_mark_node;
4507 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4509 relayout_decl (decl);
4513 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4514 any appropriate error messages regarding the layout. */
4517 layout_var_decl (tree decl)
4521 type = TREE_TYPE (decl);
4522 if (type == error_mark_node)
4525 /* If we haven't already layed out this declaration, do so now.
4526 Note that we must not call complete type for an external object
4527 because it's type might involve templates that we are not
4528 supposed to instantiate yet. (And it's perfectly valid to say
4529 `extern X x' for some incomplete type `X'.) */
4530 if (!DECL_EXTERNAL (decl))
4531 complete_type (type);
4532 if (!DECL_SIZE (decl)
4533 && TREE_TYPE (decl) != error_mark_node
4534 && (COMPLETE_TYPE_P (type)
4535 || (TREE_CODE (type) == ARRAY_TYPE
4536 && !TYPE_DOMAIN (type)
4537 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4538 layout_decl (decl, 0);
4540 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4542 /* An automatic variable with an incomplete type: that is an error.
4543 Don't talk about array types here, since we took care of that
4544 message in grokdeclarator. */
4545 error ("storage size of %qD isn't known", decl);
4546 TREE_TYPE (decl) = error_mark_node;
4549 /* Keep this code around in case we later want to control debug info
4550 based on whether a type is "used". (jason 1999-11-11) */
4552 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4553 /* Let debugger know it should output info for this type. */
4554 note_debug_info_needed (ttype);
4556 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4557 note_debug_info_needed (DECL_CONTEXT (decl));
4560 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4561 && DECL_SIZE (decl) != NULL_TREE
4562 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4564 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4565 constant_expression_warning (DECL_SIZE (decl));
4568 error ("storage size of %qD isn't constant", decl);
4569 TREE_TYPE (decl) = error_mark_node;
4574 /* If a local static variable is declared in an inline function, or if
4575 we have a weak definition, we must endeavor to create only one
4576 instance of the variable at link-time. */
4579 maybe_commonize_var (tree decl)
4581 /* Static data in a function with comdat linkage also has comdat
4583 if (TREE_STATIC (decl)
4584 /* Don't mess with __FUNCTION__. */
4585 && ! DECL_ARTIFICIAL (decl)
4586 && DECL_FUNCTION_SCOPE_P (decl)
4587 /* Unfortunately, import_export_decl has not always been called
4588 before the function is processed, so we cannot simply check
4590 && (DECL_COMDAT (DECL_CONTEXT (decl))
4591 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4592 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4593 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4597 /* With weak symbols, we simply make the variable COMDAT;
4598 that will cause copies in multiple translations units to
4600 comdat_linkage (decl);
4604 if (DECL_INITIAL (decl) == NULL_TREE
4605 || DECL_INITIAL (decl) == error_mark_node)
4607 /* Without weak symbols, we can use COMMON to merge
4608 uninitialized variables. */
4609 TREE_PUBLIC (decl) = 1;
4610 DECL_COMMON (decl) = 1;
4614 /* While for initialized variables, we must use internal
4615 linkage -- which means that multiple copies will not
4617 TREE_PUBLIC (decl) = 0;
4618 DECL_COMMON (decl) = 0;
4619 warning (0, "sorry: semantics of inline function static "
4620 "data %q+#D are wrong (you'll wind up "
4621 "with multiple copies)", decl);
4622 warning (0, "%J you can work around this by removing "
4628 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4629 /* Set it up again; we might have set DECL_INITIAL since the last
4631 comdat_linkage (decl);
4634 /* Issue an error message if DECL is an uninitialized const variable. */
4637 check_for_uninitialized_const_var (tree decl)
4639 tree type = TREE_TYPE (decl);
4641 /* ``Unless explicitly declared extern, a const object does not have
4642 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4644 if (TREE_CODE (decl) == VAR_DECL
4645 && TREE_CODE (type) != REFERENCE_TYPE
4646 && CP_TYPE_CONST_P (type)
4647 && !TYPE_NEEDS_CONSTRUCTING (type)
4648 && !DECL_INITIAL (decl))
4649 error ("uninitialized const %qD", decl);
4653 /* Structure holding the current initializer being processed by reshape_init.
4654 CUR is a pointer to the current element being processed, END is a pointer
4655 after the last element present in the initializer. */
4656 typedef struct reshape_iterator_t
4658 constructor_elt *cur;
4659 constructor_elt *end;
4662 static tree reshape_init_r (tree, reshape_iter *, bool);
4664 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4665 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4666 initialized. If there are no more such fields, the return value
4670 next_initializable_field (tree field)
4673 && (TREE_CODE (field) != FIELD_DECL
4674 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4675 || DECL_ARTIFICIAL (field)))
4676 field = TREE_CHAIN (field);
4681 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4682 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4683 INTEGER_CST representing the size of the array minus one (the maximum index),
4684 or NULL_TREE if the array was declared without specifying the size. D is
4685 the iterator within the constructor. */
4688 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4691 bool sized_array_p = (max_index != NULL_TREE);
4692 unsigned HOST_WIDE_INT max_index_cst = 0;
4693 unsigned HOST_WIDE_INT index;
4695 /* The initializer for an array is always a CONSTRUCTOR. */
4696 new_init = build_constructor (init_list_type_node, NULL);
4700 /* Minus 1 is used for zero sized arrays. */
4701 if (integer_all_onesp (max_index))
4704 if (host_integerp (max_index, 1))
4705 max_index_cst = tree_low_cst (max_index, 1);
4706 /* sizetype is sign extended, not zero extended. */
4708 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4712 /* Loop until there are no more initializers. */
4714 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4719 check_array_designated_initializer (d->cur);
4720 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4721 if (elt_init == error_mark_node)
4722 return error_mark_node;
4723 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4729 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4730 Parameters are the same of reshape_init_r. */
4733 reshape_init_array (tree type, reshape_iter *d)
4735 tree max_index = NULL_TREE;
4737 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4739 if (TYPE_DOMAIN (type))
4740 max_index = array_type_nelts (type);
4742 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4745 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4746 Parameters are the same of reshape_init_r. */
4749 reshape_init_vector (tree type, reshape_iter *d)
4751 tree max_index = NULL_TREE;
4754 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4756 if (COMPOUND_LITERAL_P (d->cur->value))
4758 tree value = d->cur->value;
4759 if (!same_type_p (TREE_TYPE (value), type))
4761 error ("invalid type %qT as initializer for a vector of type %qT",
4762 TREE_TYPE (d->cur->value), type);
4763 value = error_mark_node;
4769 /* For a vector, the representation type is a struct
4770 containing a single member which is an array of the
4771 appropriate size. */
4772 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4773 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4774 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4776 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4779 /* Subroutine of reshape_init_r, processes the initializers for classes
4780 or union. Parameters are the same of reshape_init_r. */
4783 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4788 gcc_assert (CLASS_TYPE_P (type));
4790 /* The initializer for a class is always a CONSTRUCTOR. */
4791 new_init = build_constructor (init_list_type_node, NULL);
4792 field = next_initializable_field (TYPE_FIELDS (type));
4798 An initializer for an aggregate member that is an
4799 empty class shall have the form of an empty
4800 initializer-list {}. */
4801 if (!first_initializer_p)
4803 error ("initializer for %qT must be brace-enclosed", type);
4804 return error_mark_node;
4809 /* Loop through the initializable fields, gathering initializers. */
4810 while (d->cur != d->end)
4814 /* Handle designated initializers, as an extension. */
4817 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4819 if (!field || TREE_CODE (field) != FIELD_DECL)
4821 error ("%qT has no non-static data member named %qD", type,
4823 return error_mark_node;
4827 /* If we processed all the member of the class, we are done. */
4831 field_init = reshape_init_r (TREE_TYPE (field), d,
4832 /*first_initializer_p=*/false);
4833 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4837 When a union is initialized with a brace-enclosed
4838 initializer, the braces shall only contain an
4839 initializer for the first member of the union. */
4840 if (TREE_CODE (type) == UNION_TYPE)
4843 field = next_initializable_field (TREE_CHAIN (field));
4849 /* Subroutine of reshape_init, which processes a single initializer (part of
4850 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4851 iterator within the CONSTRUCTOR which points to the initializer to process.
4852 FIRST_INITIALIZER_P is true if this is the first initializer of the
4853 CONSTRUCTOR node. */
4856 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4858 tree init = d->cur->value;
4860 if (error_operand_p (init))
4861 return error_mark_node;
4863 /* A non-aggregate type is always initialized with a single
4865 if (!CP_AGGREGATE_TYPE_P (type))
4867 /* It is invalid to initialize a non-aggregate type with a
4868 brace-enclosed initializer before C++0x.
4869 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4870 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4871 a CONSTRUCTOR (with a record type). */
4872 if (TREE_CODE (init) == CONSTRUCTOR
4873 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4875 if (SCALAR_TYPE_P (type))
4877 error ("braces around scalar initializer for type %qT", type);
4878 init = error_mark_node;
4881 maybe_warn_cpp0x ("extended initializer lists");
4890 All implicit type conversions (clause _conv_) are considered when
4891 initializing the aggregate member with an initializer from an
4892 initializer-list. If the initializer can initialize a member,
4893 the member is initialized. Otherwise, if the member is itself a
4894 non-empty subaggregate, brace elision is assumed and the
4895 initializer is considered for the initialization of the first
4896 member of the subaggregate. */
4897 if (TREE_CODE (init) != CONSTRUCTOR
4898 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4904 /* [dcl.init.string]
4906 A char array (whether plain char, signed char, or unsigned char)
4907 can be initialized by a string-literal (optionally enclosed in
4908 braces); a wchar_t array can be initialized by a wide
4909 string-literal (optionally enclosed in braces). */
4910 if (TREE_CODE (type) == ARRAY_TYPE
4911 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4913 tree str_init = init;
4915 /* Strip one level of braces if and only if they enclose a single
4916 element (as allowed by [dcl.init.string]). */
4917 if (!first_initializer_p
4918 && TREE_CODE (str_init) == CONSTRUCTOR
4919 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4921 str_init = VEC_index (constructor_elt,
4922 CONSTRUCTOR_ELTS (str_init), 0)->value;
4925 /* If it's a string literal, then it's the initializer for the array
4926 as a whole. Otherwise, continue with normal initialization for
4927 array types (one value per array element). */
4928 if (TREE_CODE (str_init) == STRING_CST)
4935 /* The following cases are about aggregates. If we are not within a full
4936 initializer already, and there is not a CONSTRUCTOR, it means that there
4937 is a missing set of braces (that is, we are processing the case for
4938 which reshape_init exists). */
4939 if (!first_initializer_p)
4941 if (TREE_CODE (init) == CONSTRUCTOR)
4943 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4944 /* There is no need to reshape pointer-to-member function
4945 initializers, as they are always constructed correctly
4946 by the front end. */
4948 else if (COMPOUND_LITERAL_P (init))
4949 /* For a nested compound literal, there is no need to reshape since
4950 brace elision is not allowed. Even if we decided to allow it,
4951 we should add a call to reshape_init in finish_compound_literal,
4952 before calling digest_init, so changing this code would still
4953 not be necessary. */
4954 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4958 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4959 return reshape_init (type, init);
4963 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4967 /* Dispatch to specialized routines. */
4968 if (CLASS_TYPE_P (type))
4969 return reshape_init_class (type, d, first_initializer_p);
4970 else if (TREE_CODE (type) == ARRAY_TYPE)
4971 return reshape_init_array (type, d);
4972 else if (TREE_CODE (type) == VECTOR_TYPE)
4973 return reshape_init_vector (type, d);
4978 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4979 brace-enclosed aggregate initializer.
4981 INIT is the CONSTRUCTOR containing the list of initializers describing
4982 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4983 It may not presently match the shape of the TYPE; for example:
4985 struct S { int a; int b; };
4986 struct S a[] = { 1, 2, 3, 4 };
4988 Here INIT will hold a VEC of four elements, rather than a
4989 VEC of two elements, each itself a VEC of two elements. This
4990 routine transforms INIT from the former form into the latter. The
4991 revised CONSTRUCTOR node is returned. */
4994 reshape_init (tree type, tree init)
4996 VEC(constructor_elt, gc) *v;
5000 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5002 v = CONSTRUCTOR_ELTS (init);
5004 /* An empty constructor does not need reshaping, and it is always a valid
5006 if (VEC_empty (constructor_elt, v))
5009 /* Recurse on this CONSTRUCTOR. */
5010 d.cur = VEC_index (constructor_elt, v, 0);
5011 d.end = d.cur + VEC_length (constructor_elt, v);
5013 new_init = reshape_init_r (type, &d, true);
5014 if (new_init == error_mark_node)
5015 return error_mark_node;
5017 /* Make sure all the element of the constructor were used. Otherwise,
5018 issue an error about exceeding initializers. */
5020 error ("too many initializers for %qT", type);
5025 /* Verify array initializer. Returns true if errors have been reported. */
5028 check_array_initializer (tree decl, tree type, tree init)
5030 tree element_type = TREE_TYPE (type);
5032 /* The array type itself need not be complete, because the
5033 initializer may tell us how many elements are in the array.
5034 But, the elements of the array must be complete. */
5035 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5038 error ("elements of array %q#D have incomplete type", decl);
5040 error ("elements of array %q#T have incomplete type", type);
5043 /* It is not valid to initialize a VLA. */
5045 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5046 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5049 error ("variable-sized object %qD may not be initialized", decl);
5051 error ("variable-sized compound literal");
5057 /* Subroutine of check_initializer; args are passed down from that function.
5058 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5061 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5064 int saved_stmts_are_full_exprs_p = 0;
5065 if (building_stmt_tree ())
5067 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5068 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5070 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5071 if (building_stmt_tree ())
5072 current_stmt_tree ()->stmts_are_full_exprs_p =
5073 saved_stmts_are_full_exprs_p;
5077 /* Verify INIT (the initializer for DECL), and record the
5078 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5079 grok_reference_init.
5081 If the return value is non-NULL, it is an expression that must be
5082 evaluated dynamically to initialize DECL. */
5085 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5087 tree type = TREE_TYPE (decl);
5088 tree init_code = NULL;
5090 /* Things that are going to be initialized need to have complete
5092 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5094 if (type == error_mark_node)
5095 /* We will have already complained. */
5098 if (TREE_CODE (type) == ARRAY_TYPE)
5100 if (check_array_initializer (decl, type, init))
5103 else if (!COMPLETE_TYPE_P (type))
5105 error ("%qD has incomplete type", decl);
5106 TREE_TYPE (decl) = error_mark_node;
5110 /* There is no way to make a variable-sized class type in GNU C++. */
5111 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5113 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5115 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5116 if (SCALAR_TYPE_P (type))
5120 maybe_warn_cpp0x ("extended initializer lists");
5121 init = build_zero_init (type, NULL_TREE, false);
5123 else if (init_len != 1)
5125 error ("scalar object %qD requires one element in initializer",
5127 TREE_TYPE (decl) = error_mark_node;
5133 if (TREE_CODE (decl) == CONST_DECL)
5135 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5137 DECL_INITIAL (decl) = init;
5139 gcc_assert (init != NULL_TREE);
5142 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5143 init = grok_reference_init (decl, type, init, cleanup);
5146 /* Do not reshape constructors of vectors (they don't need to be
5148 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5150 if (is_std_init_list (type))
5151 return build_init_list_var_init (decl, type, init, cleanup);
5152 else if (TYPE_NON_AGGREGATE_CLASS (type))
5154 /* Don't reshape if the class has constructors. */
5155 if (cxx_dialect == cxx98)
5156 error ("in C++98 %qD must be initialized by constructor, "
5159 init = build_tree_list (NULL_TREE, init);
5161 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5163 error ("opaque vector types cannot be initialized");
5164 init = error_mark_node;
5167 init = reshape_init (type, init);
5170 /* If DECL has an array type without a specific bound, deduce the
5171 array size from the initializer. */
5172 maybe_deduce_size_from_array_init (decl, init);
5173 type = TREE_TYPE (decl);
5174 if (type == error_mark_node)
5177 if (TYPE_NEEDS_CONSTRUCTING (type)
5178 || (CLASS_TYPE_P (type)
5179 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5180 return build_aggr_init_full_exprs (decl, init, flags);
5181 else if (TREE_CODE (init) != TREE_VEC)
5183 init_code = store_init_value (decl, init, flags);
5184 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5185 && DECL_INITIAL (decl)
5186 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5187 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5188 warning (0, "array %qD initialized by parenthesized string literal %qE",
5189 decl, DECL_INITIAL (decl));
5193 else if (DECL_EXTERNAL (decl))
5195 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5196 return build_aggr_init_full_exprs (decl, init, flags);
5197 else if (MAYBE_CLASS_TYPE_P (type))
5199 tree core_type = strip_array_types (type);
5201 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5202 error ("structure %qD with uninitialized const members", decl);
5203 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5204 error ("structure %qD with uninitialized reference members", decl);
5206 check_for_uninitialized_const_var (decl);
5209 check_for_uninitialized_const_var (decl);
5211 if (init && init != error_mark_node)
5212 init_code = build2 (INIT_EXPR, type, decl, init);
5217 /* If DECL is not a local variable, give it RTL. */
5220 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5222 int toplev = toplevel_bindings_p ();
5224 const char *filename;
5226 /* Set the DECL_ASSEMBLER_NAME for the object. */
5229 /* The `register' keyword, when used together with an
5230 asm-specification, indicates that the variable should be
5231 placed in a particular register. */
5232 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5234 set_user_assembler_name (decl, asmspec);
5235 DECL_HARD_REGISTER (decl) = 1;
5239 if (TREE_CODE (decl) == FUNCTION_DECL
5240 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5241 set_builtin_user_assembler_name (decl, asmspec);
5242 set_user_assembler_name (decl, asmspec);
5246 /* Handle non-variables up front. */
5247 if (TREE_CODE (decl) != VAR_DECL)
5249 rest_of_decl_compilation (decl, toplev, at_eof);
5253 /* If we see a class member here, it should be a static data
5255 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5257 gcc_assert (TREE_STATIC (decl));
5258 /* An in-class declaration of a static data member should be
5259 external; it is only a declaration, and not a definition. */
5260 if (init == NULL_TREE)
5261 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5264 /* We don't create any RTL for local variables. */
5265 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5268 /* We defer emission of local statics until the corresponding
5269 DECL_EXPR is expanded. */
5270 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5272 /* We try to defer namespace-scope static constants so that they are
5273 not emitted into the object file unnecessarily. */
5274 filename = input_filename;
5275 if (!DECL_VIRTUAL_P (decl)
5276 && TREE_READONLY (decl)
5277 && DECL_INITIAL (decl) != NULL_TREE
5278 && DECL_INITIAL (decl) != error_mark_node
5280 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5282 && !TREE_PUBLIC (decl))
5284 /* Fool with the linkage of static consts according to #pragma
5286 struct c_fileinfo *finfo = get_fileinfo (filename);
5287 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5289 TREE_PUBLIC (decl) = 1;
5290 DECL_EXTERNAL (decl) = finfo->interface_only;
5295 /* Likewise for template instantiations. */
5296 else if (DECL_LANG_SPECIFIC (decl)
5297 && DECL_IMPLICIT_INSTANTIATION (decl))
5300 /* If we're not deferring, go ahead and assemble the variable. */
5302 rest_of_decl_compilation (decl, toplev, at_eof);
5305 /* walk_tree helper for wrap_temporary_cleanups, below. */
5308 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5310 if (TYPE_P (*stmt_p))
5316 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5318 tree guard = (tree)data;
5319 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5321 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5322 /* Tell honor_protect_cleanup_actions to handle this as a separate
5324 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5326 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5332 /* We're initializing a local variable which has a cleanup GUARD. If there
5333 are any temporaries used in the initializer INIT of this variable, we
5334 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5335 variable will be cleaned up properly if one of them throws.
5337 Unfortunately, there's no way to express this properly in terms of
5338 nesting, as the regions for the temporaries overlap the region for the
5339 variable itself; if there are two temporaries, the variable needs to be
5340 the first thing destroyed if either of them throws. However, we only
5341 want to run the variable's cleanup if it actually got constructed. So
5342 we need to guard the temporary cleanups with the variable's cleanup if
5343 they are run on the normal path, but not if they are run on the
5344 exceptional path. We implement this by telling
5345 honor_protect_cleanup_actions to strip the variable cleanup from the
5346 exceptional path. */
5349 wrap_temporary_cleanups (tree init, tree guard)
5351 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5354 /* Generate code to initialize DECL (a local variable). */
5357 initialize_local_var (tree decl, tree init)
5359 tree type = TREE_TYPE (decl);
5363 gcc_assert (TREE_CODE (decl) == VAR_DECL
5364 || TREE_CODE (decl) == RESULT_DECL);
5365 gcc_assert (!TREE_STATIC (decl));
5367 if (DECL_SIZE (decl) == NULL_TREE)
5369 /* If we used it already as memory, it must stay in memory. */
5370 DECL_INITIAL (decl) = NULL_TREE;
5371 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5375 if (type == error_mark_node)
5378 /* Compute and store the initial value. */
5379 already_used = TREE_USED (decl) || TREE_USED (type);
5381 /* Generate a cleanup, if necessary. */
5382 cleanup = cxx_maybe_build_cleanup (decl);
5384 /* Perform the initialization. */
5387 int saved_stmts_are_full_exprs_p;
5389 /* If we're only initializing a single object, guard the destructors
5390 of any temporaries used in its initializer with its destructor.
5391 This isn't right for arrays because each element initialization is
5392 a full-expression. */
5393 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5394 wrap_temporary_cleanups (init, cleanup);
5396 gcc_assert (building_stmt_tree ());
5397 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5398 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5399 finish_expr_stmt (init);
5400 current_stmt_tree ()->stmts_are_full_exprs_p =
5401 saved_stmts_are_full_exprs_p;
5404 /* Set this to 0 so we can tell whether an aggregate which was
5405 initialized was ever used. Don't do this if it has a
5406 destructor, so we don't complain about the 'resource
5407 allocation is initialization' idiom. Now set
5408 attribute((unused)) on types so decls of that type will be
5409 marked used. (see TREE_USED, above.) */
5410 if (TYPE_NEEDS_CONSTRUCTING (type)
5412 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5413 && DECL_NAME (decl))
5414 TREE_USED (decl) = 0;
5415 else if (already_used)
5416 TREE_USED (decl) = 1;
5419 finish_decl_cleanup (decl, cleanup);
5422 /* DECL is a VAR_DECL for a compiler-generated variable with static
5423 storage duration (like a virtual table) whose initializer is a
5424 compile-time constant. INIT must be either a TREE_LIST of values,
5425 or a CONSTRUCTOR. Initialize the variable and provide it to the
5429 initialize_artificial_var (tree decl, tree init)
5431 gcc_assert (DECL_ARTIFICIAL (decl));
5432 if (TREE_CODE (init) == TREE_LIST)
5433 init = build_constructor_from_list (TREE_TYPE (decl), init);
5434 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5435 DECL_INITIAL (decl) = init;
5436 DECL_INITIALIZED_P (decl) = 1;
5437 determine_visibility (decl);
5438 layout_var_decl (decl);
5439 maybe_commonize_var (decl);
5440 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5443 /* INIT is the initializer for a variable, as represented by the
5444 parser. Returns true iff INIT is value-dependent. */
5447 value_dependent_init_p (tree init)
5449 if (TREE_CODE (init) == TREE_LIST)
5450 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5451 return any_value_dependent_elements_p (init);
5452 else if (TREE_CODE (init) == CONSTRUCTOR)
5453 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5455 VEC(constructor_elt, gc) *elts;
5459 elts = CONSTRUCTOR_ELTS (init);
5460 nelts = VEC_length (constructor_elt, elts);
5461 for (i = 0; i < nelts; ++i)
5462 if (value_dependent_init_p (VEC_index (constructor_elt,
5467 /* It must be a simple expression, e.g., int i = 3; */
5468 return value_dependent_expression_p (init);
5473 /* Finish processing of a declaration;
5474 install its line number and initial value.
5475 If the length of an array type is not known before,
5476 it must be determined now, from the initial value, or it is an error.
5478 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5479 true, then INIT is an integral constant expression.
5481 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5482 if the (init) syntax was used. */
5485 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5486 tree asmspec_tree, int flags)
5490 const char *asmspec = NULL;
5491 int was_readonly = 0;
5492 bool var_definition_p = false;
5493 int saved_processing_template_decl;
5496 if (decl == error_mark_node)
5501 error ("assignment (not initialization) in declaration");
5505 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5506 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5507 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5509 type = TREE_TYPE (decl);
5510 if (type == error_mark_node)
5513 /* Assume no cleanup is required. */
5514 cleanup = NULL_TREE;
5515 saved_processing_template_decl = processing_template_decl;
5517 /* If a name was specified, get the string. */
5518 if (global_scope_p (current_binding_level))
5519 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5520 if (asmspec_tree && asmspec_tree != error_mark_node)
5521 asmspec = TREE_STRING_POINTER (asmspec_tree);
5523 if (current_class_type
5524 && CP_DECL_CONTEXT (decl) == current_class_type
5525 && TYPE_BEING_DEFINED (current_class_type)
5526 && (DECL_INITIAL (decl) || init))
5527 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5529 auto_node = type_uses_auto (type);
5532 if (init == NULL_TREE)
5534 error ("declaration of %q#D has no initializer", decl);
5535 TREE_TYPE (decl) = error_mark_node;
5538 if (TREE_CODE (init) == TREE_LIST)
5539 init = build_x_compound_expr_from_list (init, "initializer");
5540 if (describable_type (init))
5542 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5543 if (type == error_mark_node)
5548 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5550 if (init == ridpointers[(int)RID_DELETE])
5552 /* FIXME check this is 1st decl. */
5553 DECL_DELETED_FN (decl) = 1;
5554 DECL_DECLARED_INLINE_P (decl) = 1;
5555 DECL_INITIAL (decl) = error_mark_node;
5558 else if (init == ridpointers[(int)RID_DEFAULT])
5560 if (!defaultable_fn_p (decl))
5562 error ("%qD cannot be defaulted", decl);
5563 DECL_INITIAL (decl) = NULL_TREE;
5566 DECL_DEFAULTED_FN (decl) = 1;
5570 if (processing_template_decl)
5572 bool type_dependent_p;
5574 /* Add this declaration to the statement-tree. */
5575 if (at_function_scope_p ())
5576 add_decl_expr (decl);
5578 type_dependent_p = dependent_type_p (type);
5580 if (check_for_bare_parameter_packs (init))
5583 DECL_INITIAL (decl) = NULL_TREE;
5586 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5588 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5589 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5590 TREE_CONSTANT (decl) = 1;
5593 /* Generally, initializers in templates are expanded when the
5594 template is instantiated. But, if DECL is an integral
5595 constant static data member, then it can be used in future
5596 integral constant expressions, and its value must be
5599 && DECL_CLASS_SCOPE_P (decl)
5600 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5601 && !type_dependent_p
5602 && !value_dependent_init_p (init)))
5605 DECL_INITIAL (decl) = init;
5606 if (TREE_CODE (decl) == VAR_DECL
5607 && !DECL_PRETTY_FUNCTION_P (decl)
5608 && !type_dependent_p)
5609 maybe_deduce_size_from_array_init (decl, init);
5613 if (TREE_CODE (init) == TREE_LIST)
5615 /* If the parenthesized-initializer form was used (e.g.,
5616 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5617 arguments. (There is generally only one.) We convert them
5620 for (; list; list = TREE_CHAIN (list))
5622 tree elt = TREE_VALUE (list);
5623 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5627 init = fold_non_dependent_expr (init);
5628 processing_template_decl = 0;
5631 /* Take care of TYPE_DECLs up front. */
5632 if (TREE_CODE (decl) == TYPE_DECL)
5634 if (type != error_mark_node
5635 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5637 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5638 warning (0, "shadowing previous type declaration of %q#D", decl);
5639 set_identifier_type_value (DECL_NAME (decl), decl);
5642 /* If we have installed this as the canonical typedef for this
5643 type, and that type has not been defined yet, delay emitting
5644 the debug information for it, as we will emit it later. */
5645 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5646 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5647 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5649 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5654 /* A reference will be modified here, as it is initialized. */
5655 if (! DECL_EXTERNAL (decl)
5656 && TREE_READONLY (decl)
5657 && TREE_CODE (type) == REFERENCE_TYPE)
5660 TREE_READONLY (decl) = 0;
5663 if (TREE_CODE (decl) == VAR_DECL)
5665 /* Only PODs can have thread-local storage. Other types may require
5666 various kinds of non-trivial initialization. */
5667 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5668 error ("%qD cannot be thread-local because it has non-POD type %qT",
5669 decl, TREE_TYPE (decl));
5670 /* If this is a local variable that will need a mangled name,
5671 register it now. We must do this before processing the
5672 initializer for the variable, since the initialization might
5673 require a guard variable, and since the mangled name of the
5674 guard variable will depend on the mangled name of this
5676 if (DECL_FUNCTION_SCOPE_P (decl)
5677 && TREE_STATIC (decl)
5678 && !DECL_ARTIFICIAL (decl))
5679 push_local_name (decl);
5680 /* Convert the initializer to the type of DECL, if we have not
5681 already initialized DECL. */
5682 if (!DECL_INITIALIZED_P (decl)
5683 /* If !DECL_EXTERNAL then DECL is being defined. In the
5684 case of a static data member initialized inside the
5685 class-specifier, there can be an initializer even if DECL
5686 is *not* defined. */
5687 && (!DECL_EXTERNAL (decl) || init))
5689 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5692 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5693 /* Allow libjava/prims.cc define primitive classes. */
5694 if (init != NULL_TREE
5695 || jclass == NULL_TREE
5696 || TREE_CODE (jclass) != TYPE_DECL
5697 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5698 || !same_type_ignoring_top_level_qualifiers_p
5699 (type, TREE_TYPE (TREE_TYPE (jclass))))
5700 error ("Java object %qD not allocated with %<new%>", decl);
5705 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5706 if (init_const_expr_p)
5708 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5709 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5710 TREE_CONSTANT (decl) = 1;
5713 init = check_initializer (decl, init, flags, &cleanup);
5714 /* Thread-local storage cannot be dynamically initialized. */
5715 if (DECL_THREAD_LOCAL_P (decl) && init)
5717 error ("%qD is thread-local and so cannot be dynamically "
5718 "initialized", decl);
5722 /* Check that the initializer for a static data member was a
5723 constant. Although we check in the parser that the
5724 initializer is an integral constant expression, we do not
5725 simplify division-by-zero at the point at which it
5726 occurs. Therefore, in:
5728 struct S { static const int i = 7 / 0; };
5730 we issue an error at this point. It would
5731 probably be better to forbid division by zero in
5732 integral constant expressions. */
5733 if (DECL_EXTERNAL (decl) && init)
5735 error ("%qD cannot be initialized by a non-constant expression"
5736 " when being declared", decl);
5737 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5745 The memory occupied by any object of static storage
5746 duration is zero-initialized at program startup before
5747 any other initialization takes place.
5749 We cannot create an appropriate initializer until after
5750 the type of DECL is finalized. If DECL_INITIAL is set,
5751 then the DECL is statically initialized, and any
5752 necessary zero-initialization has already been performed. */
5753 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5754 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5755 /*nelts=*/NULL_TREE,
5756 /*static_storage_p=*/true);
5757 /* Remember that the initialization for this variable has
5759 DECL_INITIALIZED_P (decl) = 1;
5760 /* This declaration is the definition of this variable,
5761 unless we are initializing a static data member within
5762 the class specifier. */
5763 if (!DECL_EXTERNAL (decl))
5764 var_definition_p = true;
5766 /* If the variable has an array type, lay out the type, even if
5767 there is no initializer. It is valid to index through the
5768 array, and we must get TYPE_ALIGN set correctly on the array
5770 else if (TREE_CODE (type) == ARRAY_TYPE)
5773 else if (TREE_CODE (decl) == FIELD_DECL
5774 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5775 error ("non-static data member %qD has Java class type", decl);
5777 /* Add this declaration to the statement-tree. This needs to happen
5778 after the call to check_initializer so that the DECL_EXPR for a
5779 reference temp is added before the DECL_EXPR for the reference itself. */
5780 if (at_function_scope_p ())
5781 add_decl_expr (decl);
5783 /* Let the middle end know about variables and functions -- but not
5784 static data members in uninstantiated class templates. */
5785 if (!saved_processing_template_decl
5786 && (TREE_CODE (decl) == VAR_DECL
5787 || TREE_CODE (decl) == FUNCTION_DECL))
5789 if (TREE_CODE (decl) == VAR_DECL)
5791 layout_var_decl (decl);
5792 maybe_commonize_var (decl);
5795 /* This needs to happen after the linkage is set. */
5796 determine_visibility (decl);
5798 if (var_definition_p && TREE_STATIC (decl))
5800 /* If a TREE_READONLY variable needs initialization
5801 at runtime, it is no longer readonly and we need to
5802 avoid MEM_READONLY_P being set on RTL created for it. */
5805 if (TREE_READONLY (decl))
5806 TREE_READONLY (decl) = 0;
5809 else if (was_readonly)
5810 TREE_READONLY (decl) = 1;
5813 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5815 /* Check for abstractness of the type. Notice that there is no
5816 need to strip array types here since the check for those types
5817 is already done within create_array_type_for_decl. */
5818 if (TREE_CODE (type) == FUNCTION_TYPE
5819 || TREE_CODE (type) == METHOD_TYPE)
5820 abstract_virtuals_error (decl, TREE_TYPE (type));
5822 abstract_virtuals_error (decl, type);
5824 if (TREE_TYPE (decl) == error_mark_node)
5825 /* No initialization required. */
5827 else if (TREE_CODE (decl) == FUNCTION_DECL)
5831 if (init == ridpointers[(int)RID_DEFAULT])
5833 /* An out-of-class default definition is defined at
5834 the point where it is explicitly defaulted. */
5835 if (DECL_INITIAL (decl) == error_mark_node)
5836 synthesize_method (decl);
5839 error ("function %q#D is initialized like a variable", decl);
5841 /* else no initialization required. */
5843 else if (DECL_EXTERNAL (decl)
5844 && ! (DECL_LANG_SPECIFIC (decl)
5845 && DECL_NOT_REALLY_EXTERN (decl)))
5848 DECL_INITIAL (decl) = init;
5850 /* A variable definition. */
5851 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5852 /* Initialize the local variable. */
5853 initialize_local_var (decl, init);
5855 /* If a variable is defined, and then a subsequent
5856 definition with external linkage is encountered, we will
5857 get here twice for the same variable. We want to avoid
5858 calling expand_static_init more than once. For variables
5859 that are not static data members, we can call
5860 expand_static_init only when we actually process the
5861 initializer. It is not legal to redeclare a static data
5862 member, so this issue does not arise in that case. */
5863 else if (var_definition_p && TREE_STATIC (decl))
5864 expand_static_init (decl, init);
5867 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5868 reference, insert it in the statement-tree now. */
5870 push_cleanup (decl, cleanup, false);
5873 processing_template_decl = saved_processing_template_decl;
5876 TREE_READONLY (decl) = 1;
5878 /* If this was marked 'used', be sure it will be output. */
5879 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5880 mark_decl_referenced (decl);
5883 /* Returns a declaration for a VAR_DECL as if:
5885 extern "C" TYPE NAME;
5887 had been seen. Used to create compiler-generated global
5891 declare_global_var (tree name, tree type)
5895 push_to_top_level ();
5896 decl = build_decl (input_location, VAR_DECL, name, type);
5897 TREE_PUBLIC (decl) = 1;
5898 DECL_EXTERNAL (decl) = 1;
5899 DECL_ARTIFICIAL (decl) = 1;
5900 /* If the user has explicitly declared this variable (perhaps
5901 because the code we are compiling is part of a low-level runtime
5902 library), then it is possible that our declaration will be merged
5903 with theirs by pushdecl. */
5904 decl = pushdecl (decl);
5905 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5906 pop_from_top_level ();
5911 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5912 if "__cxa_atexit" is not being used) corresponding to the function
5913 to be called when the program exits. */
5916 get_atexit_fn_ptr_type (void)
5921 if (!atexit_fn_ptr_type_node)
5923 if (flag_use_cxa_atexit
5924 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5925 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5926 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5928 /* The parameter to "atexit" is "void (*)(void)". */
5929 arg_types = void_list_node;
5931 fn_type = build_function_type (void_type_node, arg_types);
5932 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5935 return atexit_fn_ptr_type_node;
5938 /* Returns a pointer to the `atexit' function. Note that if
5939 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5940 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5943 get_atexit_node (void)
5950 bool use_aeabi_atexit;
5955 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5957 /* The declaration for `__cxa_atexit' is:
5959 int __cxa_atexit (void (*)(void *), void *, void *)
5961 We build up the argument types and then then function type
5964 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5965 /* First, build the pointer-to-function type for the first
5967 fn_ptr_type = get_atexit_fn_ptr_type ();
5968 /* Then, build the rest of the argument types. */
5969 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5970 if (use_aeabi_atexit)
5972 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5973 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5977 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5978 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5980 /* And the final __cxa_atexit type. */
5981 fn_type = build_function_type (integer_type_node, arg_types);
5982 fn_ptr_type = build_pointer_type (fn_type);
5983 if (use_aeabi_atexit)
5984 name = "__aeabi_atexit";
5986 name = "__cxa_atexit";
5990 /* The declaration for `atexit' is:
5992 int atexit (void (*)());
5994 We build up the argument types and then then function type
5996 fn_ptr_type = get_atexit_fn_ptr_type ();
5997 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5998 /* Build the final atexit type. */
5999 fn_type = build_function_type (integer_type_node, arg_types);
6003 /* Now, build the function declaration. */
6004 push_lang_context (lang_name_c);
6005 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6006 mark_used (atexit_fndecl);
6007 pop_lang_context ();
6008 atexit_node = decay_conversion (atexit_fndecl);
6013 /* Returns the __dso_handle VAR_DECL. */
6016 get_dso_handle_node (void)
6018 if (dso_handle_node)
6019 return dso_handle_node;
6021 /* Declare the variable. */
6022 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6025 return dso_handle_node;
6028 /* Begin a new function with internal linkage whose job will be simply
6029 to destroy some particular variable. */
6031 static GTY(()) int start_cleanup_cnt;
6034 start_cleanup_fn (void)
6039 bool use_cxa_atexit = flag_use_cxa_atexit
6040 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6042 push_to_top_level ();
6044 /* No need to mangle this. */
6045 push_lang_context (lang_name_c);
6047 /* Build the name of the function. */
6048 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6049 /* Build the function declaration. */
6050 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6051 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6052 /* It's a function with internal linkage, generated by the
6054 TREE_PUBLIC (fndecl) = 0;
6055 DECL_ARTIFICIAL (fndecl) = 1;
6056 /* Make the function `inline' so that it is only emitted if it is
6057 actually needed. It is unlikely that it will be inlined, since
6058 it is only called via a function pointer, but we avoid unnecessary
6059 emissions this way. */
6060 DECL_DECLARED_INLINE_P (fndecl) = 1;
6061 DECL_INTERFACE_KNOWN (fndecl) = 1;
6062 /* Build the parameter. */
6067 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6068 DECL_CONTEXT (parmdecl) = fndecl;
6069 TREE_USED (parmdecl) = 1;
6070 DECL_ARGUMENTS (fndecl) = parmdecl;
6074 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6076 pop_lang_context ();
6078 return current_function_decl;
6081 /* Finish the cleanup function begun by start_cleanup_fn. */
6084 end_cleanup_fn (void)
6086 expand_or_defer_fn (finish_function (0));
6088 pop_from_top_level ();
6091 /* Generate code to handle the destruction of DECL, an object with
6092 static storage duration. */
6095 register_dtor_fn (tree decl)
6104 type = TREE_TYPE (decl);
6105 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6106 return void_zero_node;
6108 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6109 a class object, we can just pass the destructor to
6110 "__cxa_atexit"; we don't have to build a temporary function to do
6112 use_dtor = (flag_use_cxa_atexit
6113 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6114 && CLASS_TYPE_P (type));
6119 /* Find the destructor. */
6120 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6121 gcc_assert (idx >= 0);
6122 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6123 /* Make sure it is accessible. */
6124 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6128 /* Call build_cleanup before we enter the anonymous function so
6129 that any access checks will be done relative to the current
6130 scope, rather than the scope of the anonymous function. */
6131 build_cleanup (decl);
6133 /* Now start the function. */
6134 cleanup = start_cleanup_fn ();
6136 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6137 to the original function, rather than the anonymous one. That
6138 will make the back end think that nested functions are in use,
6139 which causes confusion. */
6140 push_deferring_access_checks (dk_no_check);
6141 fcall = build_cleanup (decl);
6142 pop_deferring_access_checks ();
6144 /* Create the body of the anonymous function. */
6145 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6146 finish_expr_stmt (fcall);
6147 finish_compound_stmt (compound_stmt);
6151 /* Call atexit with the cleanup function. */
6152 mark_used (cleanup);
6153 cleanup = build_address (cleanup);
6154 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6160 /* We must convert CLEANUP to the type that "__cxa_atexit"
6162 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6163 /* "__cxa_atexit" will pass the address of DECL to the
6164 cleanup function. */
6166 addr = build_address (decl);
6167 /* The declared type of the parameter to "__cxa_atexit" is
6168 "void *". For plain "T*", we could just let the
6169 machinery in cp_build_function_call convert it -- but if the
6170 type is "cv-qualified T *", then we need to convert it
6171 before passing it in, to avoid spurious errors. */
6172 addr = build_nop (ptr_type_node, addr);
6175 /* Since the cleanup functions we build ignore the address
6176 they're given, there's no reason to pass the actual address
6177 in, and, in general, it's cheaper to pass NULL than any
6179 addr = null_pointer_node;
6180 args = tree_cons (NULL_TREE,
6181 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6182 tf_warning_or_error),
6184 if (targetm.cxx.use_aeabi_atexit ())
6186 args = tree_cons (NULL_TREE, cleanup, args);
6187 args = tree_cons (NULL_TREE, addr, args);
6191 args = tree_cons (NULL_TREE, addr, args);
6192 args = tree_cons (NULL_TREE, cleanup, args);
6196 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6197 return cp_build_function_call (get_atexit_node (), args,
6198 tf_warning_or_error);
6201 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6202 is its initializer. Generate code to handle the construction
6203 and destruction of DECL. */
6206 expand_static_init (tree decl, tree init)
6208 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6209 gcc_assert (TREE_STATIC (decl));
6211 /* Some variables require no initialization. */
6213 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6214 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6217 if (DECL_FUNCTION_SCOPE_P (decl))
6219 /* Emit code to perform this initialization but once. */
6220 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6221 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6222 tree guard, guard_addr;
6223 tree acquire_fn, release_fn, abort_fn;
6226 /* Emit code to perform this initialization but once. This code
6229 static <type> guard;
6230 if (!guard.first_byte) {
6231 if (__cxa_guard_acquire (&guard)) {
6234 // Do initialization.
6235 flag = true; __cxa_guard_release (&guard);
6236 // Register variable for destruction at end of program.
6238 if (!flag) __cxa_guard_abort (&guard);
6242 Note that the `flag' variable is only set to 1 *after* the
6243 initialization is complete. This ensures that an exception,
6244 thrown during the construction, will cause the variable to
6245 reinitialized when we pass through this code again, as per:
6249 If the initialization exits by throwing an exception, the
6250 initialization is not complete, so it will be tried again
6251 the next time control enters the declaration.
6253 This process should be thread-safe, too; multiple threads
6254 should not be able to initialize the variable more than
6257 /* Create the guard variable. */
6258 guard = get_guard (decl);
6260 /* This optimization isn't safe on targets with relaxed memory
6261 consistency. On such targets we force synchronization in
6262 __cxa_guard_acquire. */
6263 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6265 /* Begin the conditional initialization. */
6266 if_stmt = begin_if_stmt ();
6267 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6268 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6271 if (flag_threadsafe_statics)
6273 guard_addr = build_address (guard);
6275 acquire_fn = get_identifier ("__cxa_guard_acquire");
6276 release_fn = get_identifier ("__cxa_guard_release");
6277 abort_fn = get_identifier ("__cxa_guard_abort");
6278 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6280 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6282 tree vfntype = build_function_type (void_type_node, argtypes);
6283 acquire_fn = push_library_fn
6284 (acquire_fn, build_function_type (integer_type_node, argtypes),
6286 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6287 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6291 release_fn = identifier_global_value (release_fn);
6292 abort_fn = identifier_global_value (abort_fn);
6295 inner_if_stmt = begin_if_stmt ();
6296 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6299 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6300 begin = get_target_expr (boolean_false_node);
6301 flag = TARGET_EXPR_SLOT (begin);
6303 TARGET_EXPR_CLEANUP (begin)
6304 = build3 (COND_EXPR, void_type_node, flag,
6306 build_call_n (abort_fn, 1, guard_addr));
6307 CLEANUP_EH_ONLY (begin) = 1;
6309 /* Do the initialization itself. */
6310 init = add_stmt_to_compound (begin, init);
6311 init = add_stmt_to_compound
6312 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6313 init = add_stmt_to_compound
6314 (init, build_call_n (release_fn, 1, guard_addr));
6317 init = add_stmt_to_compound (init, set_guard (guard));
6319 /* Use atexit to register a function for destroying this static
6321 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6323 finish_expr_stmt (init);
6325 if (flag_threadsafe_statics)
6327 finish_compound_stmt (inner_then_clause);
6328 finish_then_clause (inner_if_stmt);
6329 finish_if_stmt (inner_if_stmt);
6332 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6334 finish_compound_stmt (then_clause);
6335 finish_then_clause (if_stmt);
6336 finish_if_stmt (if_stmt);
6340 static_aggregates = tree_cons (init, decl, static_aggregates);
6344 /* Make TYPE a complete type based on INITIAL_VALUE.
6345 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6346 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6347 3 if the initializer list is empty (in pedantic mode). */
6350 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6353 tree type, elt_type;
6357 unsigned HOST_WIDE_INT i;
6360 /* An array of character type can be initialized from a
6361 brace-enclosed string constant.
6363 FIXME: this code is duplicated from reshape_init. Probably
6364 we should just call reshape_init here? */
6365 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6366 && TREE_CODE (initial_value) == CONSTRUCTOR
6367 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6369 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6370 tree value = VEC_index (constructor_elt, v, 0)->value;
6372 if (TREE_CODE (value) == STRING_CST
6373 && VEC_length (constructor_elt, v) == 1)
6374 initial_value = value;
6377 /* If any of the elements are parameter packs, we can't actually
6378 complete this type now because the array size is dependent. */
6379 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6381 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6384 if (PACK_EXPANSION_P (value))
6390 failure = complete_array_type (ptype, initial_value, do_default);
6392 /* We can create the array before the element type is complete, which
6393 means that we didn't have these two bits set in the original type
6394 either. In completing the type, we are expected to propagate these
6395 bits. See also complete_type which does the same thing for arrays
6398 if (TYPE_DOMAIN (type))
6400 elt_type = TREE_TYPE (type);
6401 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6402 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6403 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6409 /* Return zero if something is declared to be a member of type
6410 CTYPE when in the context of CUR_TYPE. STRING is the error
6411 message to print in that case. Otherwise, quietly return 1. */
6414 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6416 if (ctype && ctype != cur_type)
6418 if (flags == DTOR_FLAG)
6419 error ("destructor for alien class %qT cannot be a member", ctype);
6421 error ("constructor for alien class %qT cannot be a member", ctype);
6427 /* Subroutine of `grokdeclarator'. */
6429 /* Generate errors possibly applicable for a given set of specifiers.
6430 This is for ARM $7.1.2. */
6433 bad_specifiers (tree object,
6442 error ("%qD declared as a %<virtual%> %s", object, type);
6444 error ("%qD declared as an %<inline%> %s", object, type);
6446 error ("%<const%> and %<volatile%> function specifiers on "
6447 "%qD invalid in %s declaration",
6450 error ("%q+D declared as a friend", object);
6452 && (TREE_CODE (object) == TYPE_DECL
6453 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6454 && !TYPE_REFFN_P (TREE_TYPE (object))
6455 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6456 error ("%q+D declared with an exception specification", object);
6459 /* DECL is a member function or static data member and is presently
6460 being defined. Check that the definition is taking place in a
6464 check_class_member_definition_namespace (tree decl)
6466 /* These checks only apply to member functions and static data
6468 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6469 || TREE_CODE (decl) == VAR_DECL);
6470 /* We check for problems with specializations in pt.c in
6471 check_specialization_namespace, where we can issue better
6473 if (processing_specialization)
6475 /* There are no restrictions on the placement of
6476 explicit instantiations. */
6477 if (processing_explicit_instantiation)
6481 A member function definition that appears outside of the
6482 class definition shall appear in a namespace scope enclosing
6483 the class definition.
6487 The definition for a static data member shall appear in a
6488 namespace scope enclosing the member's class definition. */
6489 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6490 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6491 decl, DECL_CONTEXT (decl));
6494 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6495 METHOD_TYPE for a non-static member function; QUALS are the
6496 cv-qualifiers that apply to the function. */
6499 build_this_parm (tree type, cp_cv_quals quals)
6504 cp_cv_quals this_quals;
6506 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6507 /* The `this' parameter is implicitly `const'; it cannot be
6509 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6510 qual_type = cp_build_qualified_type (this_type, this_quals);
6511 parm = build_artificial_parm (this_identifier, qual_type);
6512 cp_apply_type_quals_to_decl (this_quals, parm);
6516 /* CTYPE is class type, or null if non-class.
6517 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6519 DECLARATOR is the function's name.
6520 PARMS is a chain of PARM_DECLs for the function.
6521 VIRTUALP is truthvalue of whether the function is virtual or not.
6522 FLAGS are to be passed through to `grokclassfn'.
6523 QUALS are qualifiers indicating whether the function is `const'
6525 RAISES is a list of exceptions that this function can raise.
6526 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6527 not look, and -1 if we should not call `grokclassfn' at all.
6529 SFK is the kind of special function (if any) for the new function.
6531 Returns `NULL_TREE' if something goes wrong, after issuing
6532 applicable error messages. */
6535 grokfndecl (tree ctype,
6539 tree orig_declarator,
6541 enum overload_flags flags,
6548 special_function_kind sfk,
6553 location_t location)
6556 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6560 type = build_exception_variant (type, raises);
6562 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6564 /* If we have an explicit location, use it, otherwise use whatever
6565 build_lang_decl used (probably input_location). */
6566 if (location != UNKNOWN_LOCATION)
6567 DECL_SOURCE_LOCATION (decl) = location;
6569 if (TREE_CODE (type) == METHOD_TYPE)
6572 parm = build_this_parm (type, quals);
6573 TREE_CHAIN (parm) = parms;
6576 DECL_ARGUMENTS (decl) = parms;
6577 for (t = parms; t; t = TREE_CHAIN (t))
6578 DECL_CONTEXT (t) = decl;
6579 /* Propagate volatile out from type to decl. */
6580 if (TYPE_VOLATILE (type))
6581 TREE_THIS_VOLATILE (decl) = 1;
6583 /* Setup decl according to sfk. */
6586 case sfk_constructor:
6587 case sfk_copy_constructor:
6588 DECL_CONSTRUCTOR_P (decl) = 1;
6590 case sfk_destructor:
6591 DECL_DESTRUCTOR_P (decl) = 1;
6597 /* If pointers to member functions use the least significant bit to
6598 indicate whether a function is virtual, ensure a pointer
6599 to this function will have that bit clear. */
6600 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6601 && TREE_CODE (type) == METHOD_TYPE
6602 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6603 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6606 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6610 ("defining explicit specialization %qD in friend declaration",
6614 tree fns = TREE_OPERAND (orig_declarator, 0);
6615 tree args = TREE_OPERAND (orig_declarator, 1);
6617 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6619 /* Something like `template <class T> friend void f<T>()'. */
6620 error ("invalid use of template-id %qD in declaration "
6621 "of primary template",
6627 /* A friend declaration of the form friend void f<>(). Record
6628 the information in the TEMPLATE_ID_EXPR. */
6629 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6631 if (TREE_CODE (fns) == COMPONENT_REF)
6633 /* Due to bison parser ickiness, we will have already looked
6634 up an operator_name or PFUNCNAME within the current class
6635 (see template_id in parse.y). If the current class contains
6636 such a name, we'll get a COMPONENT_REF here. Undo that. */
6638 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6639 == current_class_type);
6640 fns = TREE_OPERAND (fns, 1);
6642 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6643 || TREE_CODE (fns) == OVERLOAD);
6644 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6646 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6647 if (TREE_PURPOSE (t)
6648 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6650 error ("default arguments are not allowed in declaration "
6651 "of friend template specialization %qD",
6658 error ("%<inline%> is not allowed in declaration of friend "
6659 "template specialization %qD",
6666 /* If this decl has namespace scope, set that up. */
6668 set_decl_namespace (decl, in_namespace, friendp);
6670 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6672 /* `main' and builtins have implicit 'C' linkage. */
6673 if ((MAIN_NAME_P (declarator)
6674 || (IDENTIFIER_LENGTH (declarator) > 10
6675 && IDENTIFIER_POINTER (declarator)[0] == '_'
6676 && IDENTIFIER_POINTER (declarator)[1] == '_'
6677 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6678 && current_lang_name == lang_name_cplusplus
6679 && ctype == NULL_TREE
6680 /* NULL_TREE means global namespace. */
6681 && DECL_CONTEXT (decl) == NULL_TREE)
6682 SET_DECL_LANGUAGE (decl, lang_c);
6684 /* Should probably propagate const out from type to decl I bet (mrs). */
6687 DECL_STATIC_FUNCTION_P (decl) = 1;
6688 DECL_CONTEXT (decl) = ctype;
6693 DECL_CONTEXT (decl) = ctype;
6695 check_class_member_definition_namespace (decl);
6698 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6700 if (processing_template_decl)
6701 error ("cannot declare %<::main%> to be a template");
6703 error ("cannot declare %<::main%> to be inline");
6705 error ("cannot declare %<::main%> to be static");
6710 /* Members of anonymous types and local classes have no linkage; make
6711 them internal. If a typedef is made later, this will be changed. */
6712 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6713 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6718 /* [basic.link]: A name with no linkage (notably, the name of a class
6719 or enumeration declared in a local scope) shall not be used to
6720 declare an entity with linkage.
6722 Only check this for public decls for now. See core 319, 389. */
6723 t = no_linkage_check (TREE_TYPE (decl),
6724 /*relaxed_p=*/false);
6727 if (TYPE_ANONYMOUS_P (t))
6729 if (DECL_EXTERN_C_P (decl))
6730 /* Allow this; it's pretty common in C. */;
6733 permerror (input_location, "non-local function %q#D uses anonymous type",
6735 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6736 permerror (input_location, "%q+#D does not refer to the unqualified "
6737 "type, so it is not used for linkage",
6742 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6746 TREE_PUBLIC (decl) = publicp;
6749 DECL_INTERFACE_KNOWN (decl) = 1;
6750 DECL_NOT_REALLY_EXTERN (decl) = 1;
6753 /* If the declaration was declared inline, mark it as such. */
6755 DECL_DECLARED_INLINE_P (decl) = 1;
6757 DECL_EXTERNAL (decl) = 1;
6758 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6761 ? G_("static member function %qD cannot have cv-qualifier")
6762 : G_("non-member function %qD cannot have cv-qualifier"),
6764 quals = TYPE_UNQUALIFIED;
6767 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6768 && !grok_op_properties (decl, /*complain=*/true))
6771 if (ctype && decl_function_context (decl))
6772 DECL_NO_STATIC_CHAIN (decl) = 1;
6775 /* Make the init_value nonzero so pushdecl knows this is not
6776 tentative. error_mark_node is replaced later with the BLOCK. */
6777 DECL_INITIAL (decl) = error_mark_node;
6779 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6780 TREE_NOTHROW (decl) = 1;
6782 /* Caller will do the rest of this. */
6786 if (ctype != NULL_TREE)
6787 grokclassfn (ctype, decl, flags);
6789 decl = check_explicit_specialization (orig_declarator, decl,
6792 4 * (friendp != 0));
6793 if (decl == error_mark_node)
6798 cplus_decl_attributes (&decl, *attrlist, 0);
6799 *attrlist = NULL_TREE;
6802 /* Check main's type after attributes have been applied. */
6803 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6805 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6808 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6810 error ("%<::main%> must return %<int%>");
6811 newtype = build_function_type (integer_type_node, oldtypeargs);
6812 TREE_TYPE (decl) = newtype;
6815 check_main_parameter_types (decl);
6818 if (ctype != NULL_TREE
6819 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6822 tree old_decl = check_classfn (ctype, decl,
6823 (processing_template_decl
6824 > template_class_depth (ctype))
6825 ? current_template_parms
6828 if (old_decl == error_mark_node)
6836 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6837 /* Because grokfndecl is always supposed to return a
6838 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6839 here. We depend on our callers to figure out that its
6840 really a template that's being returned. */
6841 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6843 if (DECL_STATIC_FUNCTION_P (old_decl)
6844 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6845 /* Remove the `this' parm added by grokclassfn.
6846 XXX Isn't this done in start_function, too? */
6847 revert_static_member_fn (decl);
6848 if (DECL_ARTIFICIAL (old_decl))
6850 error ("definition of implicitly-declared %qD", old_decl);
6854 /* Since we've smashed OLD_DECL to its
6855 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6856 if (TREE_CODE (decl) == TEMPLATE_DECL)
6857 decl = DECL_TEMPLATE_RESULT (decl);
6859 /* Attempt to merge the declarations. This can fail, in
6860 the case of some invalid specialization declarations. */
6861 pushed_scope = push_scope (ctype);
6862 ok = duplicate_decls (decl, old_decl, friendp);
6864 pop_scope (pushed_scope);
6867 error ("no %q#D member function declared in class %qT",
6875 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6878 if (ctype == NULL_TREE || check)
6882 DECL_VIRTUAL_P (decl) = 1;
6887 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6888 the linkage that DECL will receive in the object file. */
6891 set_linkage_for_static_data_member (tree decl)
6893 /* A static data member always has static storage duration and
6894 external linkage. Note that static data members are forbidden in
6895 local classes -- the only situation in which a class has
6896 non-external linkage. */
6897 TREE_PUBLIC (decl) = 1;
6898 TREE_STATIC (decl) = 1;
6899 /* For non-template classes, static data members are always put
6900 out in exactly those files where they are defined, just as
6901 with ordinary namespace-scope variables. */
6902 if (!processing_template_decl)
6903 DECL_INTERFACE_KNOWN (decl) = 1;
6906 /* Create a VAR_DECL named NAME with the indicated TYPE.
6908 If SCOPE is non-NULL, it is the class type or namespace containing
6909 the variable. If SCOPE is NULL, the variable should is created in
6910 the innermost enclosings scope. */
6913 grokvardecl (tree type,
6915 const cp_decl_specifier_seq *declspecs,
6921 tree explicit_scope;
6923 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6925 /* Compute the scope in which to place the variable, but remember
6926 whether or not that scope was explicitly specified by the user. */
6927 explicit_scope = scope;
6930 /* An explicit "extern" specifier indicates a namespace-scope
6932 if (declspecs->storage_class == sc_extern)
6933 scope = current_namespace;
6934 else if (!at_function_scope_p ())
6935 scope = current_scope ();
6939 && (/* If the variable is a namespace-scope variable declared in a
6940 template, we need DECL_LANG_SPECIFIC. */
6941 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6942 /* Similarly for namespace-scope variables with language linkage
6944 || (TREE_CODE (scope) == NAMESPACE_DECL
6945 && current_lang_name != lang_name_cplusplus)
6946 /* Similarly for static data members. */
6948 decl = build_lang_decl (VAR_DECL, name, type);
6950 decl = build_decl (input_location, VAR_DECL, name, type);
6952 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6953 set_decl_namespace (decl, explicit_scope, 0);
6955 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6957 if (declspecs->storage_class == sc_extern)
6959 DECL_THIS_EXTERN (decl) = 1;
6960 DECL_EXTERNAL (decl) = !initialized;
6963 if (DECL_CLASS_SCOPE_P (decl))
6965 set_linkage_for_static_data_member (decl);
6966 /* This function is only called with out-of-class definitions. */
6967 DECL_EXTERNAL (decl) = 0;
6968 check_class_member_definition_namespace (decl);
6970 /* At top level, either `static' or no s.c. makes a definition
6971 (perhaps tentative), and absence of `static' makes it public. */
6972 else if (toplevel_bindings_p ())
6974 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6975 && (DECL_THIS_EXTERN (decl) || ! constp));
6976 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6978 /* Not at top level, only `static' makes a static definition. */
6981 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6982 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6985 if (declspecs->specs[(int)ds_thread])
6986 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6988 if (TREE_PUBLIC (decl))
6990 /* [basic.link]: A name with no linkage (notably, the name of a class
6991 or enumeration declared in a local scope) shall not be used to
6992 declare an entity with linkage.
6994 Only check this for public decls for now. */
6995 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6998 if (TYPE_ANONYMOUS_P (t))
7000 if (DECL_EXTERN_C_P (decl))
7001 /* Allow this; it's pretty common in C. */
7005 /* DRs 132, 319 and 389 seem to indicate types with
7006 no linkage can only be used to declare extern "C"
7007 entities. Since it's not always an error in the
7008 ISO C++ 90 Standard, we only issue a warning. */
7009 warning (0, "non-local variable %q#D uses anonymous type",
7011 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7012 warning (0, "%q+#D does not refer to the unqualified "
7013 "type, so it is not used for linkage",
7018 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7022 DECL_INTERFACE_KNOWN (decl) = 1;
7027 /* Create and return a canonical pointer to member function type, for
7028 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7031 build_ptrmemfunc_type (tree type)
7035 tree unqualified_variant = NULL_TREE;
7037 if (type == error_mark_node)
7040 /* If a canonical type already exists for this type, use it. We use
7041 this method instead of type_hash_canon, because it only does a
7042 simple equality check on the list of field members. */
7044 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7047 /* Make sure that we always have the unqualified pointer-to-member
7049 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7051 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7053 t = make_class_type (RECORD_TYPE);
7054 xref_basetypes (t, NULL_TREE);
7056 /* Let the front end know this is a pointer to member function... */
7057 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7058 /* ... and not really a class type. */
7059 SET_CLASS_TYPE_P (t, 0);
7061 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7064 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7066 TREE_CHAIN (field) = fields;
7069 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7071 /* Zap out the name so that the back end will give us the debugging
7072 information for this anonymous RECORD_TYPE. */
7073 TYPE_NAME (t) = NULL_TREE;
7075 /* If this is not the unqualified form of this pointer-to-member
7076 type, set the TYPE_MAIN_VARIANT for this type to be the
7077 unqualified type. Since they are actually RECORD_TYPEs that are
7078 not variants of each other, we must do this manually. */
7079 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7081 t = build_qualified_type (t, cp_type_quals (type));
7082 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7083 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7084 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7085 TREE_TYPE (TYPE_BINFO (t)) = t;
7088 /* Cache this pointer-to-member type so that we can find it again
7090 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7092 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7093 SET_TYPE_STRUCTURAL_EQUALITY (t);
7094 else if (TYPE_CANONICAL (type) != type)
7095 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7100 /* Create and return a pointer to data member type. */
7103 build_ptrmem_type (tree class_type, tree member_type)
7105 if (TREE_CODE (member_type) == METHOD_TYPE)
7109 arg_types = TYPE_ARG_TYPES (member_type);
7110 class_type = (cp_build_qualified_type
7112 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7114 = build_method_type_directly (class_type,
7115 TREE_TYPE (member_type),
7116 TREE_CHAIN (arg_types));
7117 return build_ptrmemfunc_type (build_pointer_type (member_type));
7121 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7122 return build_offset_type (class_type, member_type);
7126 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7127 Check to see that the definition is valid. Issue appropriate error
7128 messages. Return 1 if the definition is particularly bad, or 0
7132 check_static_variable_definition (tree decl, tree type)
7134 /* Motion 10 at San Diego: If a static const integral data member is
7135 initialized with an integral constant expression, the initializer
7136 may appear either in the declaration (within the class), or in
7137 the definition, but not both. If it appears in the class, the
7138 member is a member constant. The file-scope definition is always
7140 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7142 error ("invalid in-class initialization of static data member "
7143 "of non-integral type %qT",
7145 /* If we just return the declaration, crashes will sometimes
7146 occur. We therefore return void_type_node, as if this were a
7147 friend declaration, to cause callers to completely ignore
7148 this declaration. */
7151 else if (!CP_TYPE_CONST_P (type))
7152 error ("ISO C++ forbids in-class initialization of non-const "
7153 "static member %qD",
7155 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7156 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7157 "%qD of non-integral type %qT", decl, type);
7162 /* Given the SIZE (i.e., number of elements) in an array, compute an
7163 appropriate index type for the array. If non-NULL, NAME is the
7164 name of the thing being declared. */
7167 compute_array_index_type (tree name, tree size)
7171 tree abi_1_itype = NULL_TREE;
7173 if (error_operand_p (size))
7174 return error_mark_node;
7176 type = TREE_TYPE (size);
7177 /* The array bound must be an integer type. */
7178 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7181 error ("size of array %qD has non-integral type %qT", name, type);
7183 error ("size of array has non-integral type %qT", type);
7184 size = integer_one_node;
7185 type = TREE_TYPE (size);
7188 /* We can only call value_dependent_expression_p on integral constant
7189 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7190 set if this isn't one. */
7191 if (processing_template_decl
7192 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7194 /* We cannot do any checking for a SIZE that isn't known to be
7195 constant. Just build the index type and mark that it requires
7196 structural equality checks. */
7197 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7198 size, integer_one_node));
7199 if (!TREE_SIDE_EFFECTS (size))
7201 TYPE_DEPENDENT_P (itype) = 1;
7202 TYPE_DEPENDENT_P_VALID (itype) = 1;
7204 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7208 if (!abi_version_at_least (2) && processing_template_decl)
7209 /* For abi-1, we handled all instances in templates the same way,
7210 even when they were non-dependent. This affects the manglings
7211 produced. So, we do the normal checking for non-dependent
7212 sizes, but at the end we'll return the same type that abi-1
7213 would have, but with TYPE_CANONICAL set to the "right"
7214 value that the current ABI would provide. */
7215 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7216 size, integer_one_node));
7218 /* The size might be the result of a cast. */
7219 STRIP_TYPE_NOPS (size);
7221 /* It might be a const variable or enumeration constant. */
7222 size = integral_constant_value (size);
7224 /* Normally, the array-bound will be a constant. */
7225 if (TREE_CODE (size) == INTEGER_CST)
7227 /* Check to see if the array bound overflowed. Make that an
7228 error, no matter how generous we're being. */
7229 constant_expression_error (size);
7231 /* An array must have a positive number of elements. */
7232 if (INT_CST_LT (size, integer_zero_node))
7235 error ("size of array %qD is negative", name);
7237 error ("size of array is negative");
7238 size = integer_one_node;
7240 /* As an extension we allow zero-sized arrays. We always allow
7241 them in system headers because glibc uses them. */
7242 else if (integer_zerop (size) && !in_system_header)
7245 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7247 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7250 else if (TREE_CONSTANT (size))
7252 /* `(int) &fn' is not a valid array bound. */
7254 error ("size of array %qD is not an integral constant-expression",
7257 error ("size of array is not an integral constant-expression");
7258 size = integer_one_node;
7260 else if (pedantic && warn_vla != 0)
7263 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7265 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7267 else if (warn_vla > 0)
7271 "variable length array %qD is used", name);
7274 "variable length array is used");
7277 if (processing_template_decl && !TREE_CONSTANT (size))
7278 /* A variable sized array. */
7279 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7282 HOST_WIDE_INT saved_processing_template_decl;
7284 /* Compute the index of the largest element in the array. It is
7285 one less than the number of elements in the array. We save
7286 and restore PROCESSING_TEMPLATE_DECL so that computations in
7287 cp_build_binary_op will be appropriately folded. */
7288 saved_processing_template_decl = processing_template_decl;
7289 processing_template_decl = 0;
7290 itype = cp_build_binary_op (input_location,
7292 cp_convert (ssizetype, size),
7293 cp_convert (ssizetype, integer_one_node),
7294 tf_warning_or_error);
7295 itype = fold (itype);
7296 processing_template_decl = saved_processing_template_decl;
7298 if (!TREE_CONSTANT (itype))
7299 /* A variable sized array. */
7300 itype = variable_size (itype);
7301 /* Make sure that there was no overflow when creating to a signed
7302 index type. (For example, on a 32-bit machine, an array with
7303 size 2^32 - 1 is too big.) */
7304 else if (TREE_CODE (itype) == INTEGER_CST
7305 && TREE_OVERFLOW (itype))
7307 error ("overflow in array dimension");
7308 TREE_OVERFLOW (itype) = 0;
7312 /* Create and return the appropriate index type. */
7315 tree t = build_index_type (itype);
7316 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7320 return build_index_type (itype);
7323 /* Returns the scope (if any) in which the entity declared by
7324 DECLARATOR will be located. If the entity was declared with an
7325 unqualified name, NULL_TREE is returned. */
7328 get_scope_of_declarator (const cp_declarator *declarator)
7330 while (declarator && declarator->kind != cdk_id)
7331 declarator = declarator->declarator;
7333 /* If the declarator-id is a SCOPE_REF, the scope in which the
7334 declaration occurs is the first operand. */
7336 && declarator->u.id.qualifying_scope)
7337 return declarator->u.id.qualifying_scope;
7339 /* Otherwise, the declarator is not a qualified name; the entity will
7340 be declared in the current scope. */
7344 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7345 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7349 create_array_type_for_decl (tree name, tree type, tree size)
7351 tree itype = NULL_TREE;
7352 const char* error_msg;
7354 /* If things have already gone awry, bail now. */
7355 if (type == error_mark_node || size == error_mark_node)
7356 return error_mark_node;
7358 /* Assume that everything will go OK. */
7361 /* There are some types which cannot be array elements. */
7362 switch (TREE_CODE (type))
7365 error_msg = "array of void";
7369 error_msg = "array of functions";
7372 case REFERENCE_TYPE:
7373 error_msg = "array of references";
7377 error_msg = "array of function members";
7384 /* If something went wrong, issue an error-message and return. */
7388 error ("declaration of %qD as %s", name, error_msg);
7390 error ("creating %s", error_msg);
7392 return error_mark_node;
7397 The constant expressions that specify the bounds of the arrays
7398 can be omitted only for the first member of the sequence. */
7399 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7402 error ("declaration of %qD as multidimensional array must "
7403 "have bounds for all dimensions except the first",
7406 error ("multidimensional array must have bounds for all "
7407 "dimensions except the first");
7409 return error_mark_node;
7412 /* Figure out the index type for the array. */
7414 itype = compute_array_index_type (name, size);
7417 T is called the array element type; this type shall not be [...] an
7418 abstract class type. */
7419 abstract_virtuals_error (name, type);
7421 return build_cplus_array_type (type, itype);
7424 /* Check that it's OK to declare a function with the indicated TYPE.
7425 SFK indicates the kind of special function (if any) that this
7426 function is. OPTYPE is the type given in a conversion operator
7427 declaration, or the class type for a constructor/destructor.
7428 Returns the actual return type of the function; that
7429 may be different than TYPE if an error occurs, or for certain
7430 special functions. */
7433 check_special_function_return_type (special_function_kind sfk,
7439 case sfk_constructor:
7441 error ("return type specification for constructor invalid");
7443 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7444 type = build_pointer_type (optype);
7446 type = void_type_node;
7449 case sfk_destructor:
7451 error ("return type specification for destructor invalid");
7452 /* We can't use the proper return type here because we run into
7453 problems with ambiguous bases and covariant returns.
7454 Java classes are left unchanged because (void *) isn't a valid
7455 Java type, and we don't want to change the Java ABI. */
7456 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7457 type = build_pointer_type (void_type_node);
7459 type = void_type_node;
7462 case sfk_conversion:
7464 error ("return type specified for %<operator %T%>", optype);
7475 /* A variable or data member (whose unqualified name is IDENTIFIER)
7476 has been declared with the indicated TYPE. If the TYPE is not
7477 acceptable, issue an error message and return a type to use for
7478 error-recovery purposes. */
7481 check_var_type (tree identifier, tree type)
7483 if (VOID_TYPE_P (type))
7486 error ("unnamed variable or field declared void");
7487 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7489 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7490 error ("variable or field %qE declared void", identifier);
7493 error ("variable or field declared void");
7494 type = error_mark_node;
7500 /* Given declspecs and a declarator (abstract or otherwise), determine
7501 the name and type of the object declared and construct a DECL node
7504 DECLSPECS points to the representation of declaration-specifier
7505 sequence that precedes declarator.
7507 DECL_CONTEXT says which syntactic context this declaration is in:
7508 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7509 FUNCDEF for a function definition. Like NORMAL but a few different
7510 error messages in each case. Return value may be zero meaning
7511 this definition is too screwy to try to parse.
7512 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7513 handle member functions (which have FIELD context).
7514 Return value may be zero meaning this definition is too screwy to
7516 PARM for a parameter declaration (either within a function prototype
7517 or before a function body). Make a PARM_DECL, or return void_type_node.
7518 CATCHPARM for a parameter declaration before a catch clause.
7519 TYPENAME if for a typename (in a cast or sizeof).
7520 Don't make a DECL node; just return the ..._TYPE node.
7521 FIELD for a struct or union field; make a FIELD_DECL.
7522 BITFIELD for a field with specified width.
7523 INITIALIZED is as for start_decl.
7525 ATTRLIST is a pointer to the list of attributes, which may be NULL
7526 if there are none; *ATTRLIST may be modified if attributes from inside
7527 the declarator should be applied to the declaration.
7529 When this function is called, scoping variables (such as
7530 CURRENT_CLASS_TYPE) should reflect the scope in which the
7531 declaration occurs, not the scope in which the new declaration will
7532 be placed. For example, on:
7536 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7539 Returns a DECL (if a declarator is present), a TYPE (if there is no
7540 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7544 grokdeclarator (const cp_declarator *declarator,
7545 const cp_decl_specifier_seq *declspecs,
7546 enum decl_context decl_context,
7550 tree type = NULL_TREE;
7552 int virtualp, explicitp, friendp, inlinep, staticp;
7553 int explicit_int = 0;
7554 int explicit_char = 0;
7555 int defaulted_int = 0;
7556 tree dependent_name = NULL_TREE;
7558 tree typedef_decl = NULL_TREE;
7559 const char *name = NULL;
7560 tree typedef_type = NULL_TREE;
7561 /* True if this declarator is a function definition. */
7562 bool funcdef_flag = false;
7563 cp_declarator_kind innermost_code = cdk_error;
7566 /* See the code below that used this. */
7567 tree decl_attr = NULL_TREE;
7570 /* Keep track of what sort of function is being processed
7571 so that we can warn about default return values, or explicit
7572 return values which do not match prescribed defaults. */
7573 special_function_kind sfk = sfk_none;
7575 tree dname = NULL_TREE;
7576 tree ctor_return_type = NULL_TREE;
7577 enum overload_flags flags = NO_SPECIAL;
7578 /* cv-qualifiers that apply to the declarator, for a declaration of
7579 a member function. */
7580 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7581 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7583 tree raises = NULL_TREE;
7584 int template_count = 0;
7585 tree returned_attrs = NULL_TREE;
7586 tree parms = NULL_TREE;
7587 const cp_declarator *id_declarator;
7588 /* The unqualified name of the declarator; either an
7589 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7590 tree unqualified_id;
7591 /* The class type, if any, in which this entity is located,
7592 or NULL_TREE if none. Note that this value may be different from
7593 the current class type; for example if an attempt is made to declare
7594 "A::f" inside "B", this value will be "A". */
7595 tree ctype = current_class_type;
7596 /* The NAMESPACE_DECL for the namespace in which this entity is
7597 located. If an unqualified name is used to declare the entity,
7598 this value will be NULL_TREE, even if the entity is located at
7600 tree in_namespace = NULL_TREE;
7601 cp_storage_class storage_class;
7602 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7603 bool type_was_error_mark_node = false;
7604 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7605 bool set_no_warning = false;
7606 bool template_type_arg = false;
7609 signed_p = declspecs->specs[(int)ds_signed];
7610 unsigned_p = declspecs->specs[(int)ds_unsigned];
7611 short_p = declspecs->specs[(int)ds_short];
7612 long_p = declspecs->specs[(int)ds_long];
7613 longlong = declspecs->specs[(int)ds_long] >= 2;
7614 thread_p = declspecs->specs[(int)ds_thread];
7616 if (decl_context == FUNCDEF)
7617 funcdef_flag = true, decl_context = NORMAL;
7618 else if (decl_context == MEMFUNCDEF)
7619 funcdef_flag = true, decl_context = FIELD;
7620 else if (decl_context == BITFIELD)
7621 bitfield = 1, decl_context = FIELD;
7622 else if (decl_context == TEMPLATE_TYPE_ARG)
7623 template_type_arg = true, decl_context = TYPENAME;
7625 if (initialized > 1)
7626 funcdef_flag = true;
7628 /* Look inside a declarator for the name being declared
7629 and get it as a string, for an error message. */
7630 for (id_declarator = declarator;
7632 id_declarator = id_declarator->declarator)
7634 if (id_declarator->kind != cdk_id)
7635 innermost_code = id_declarator->kind;
7637 switch (id_declarator->kind)
7640 if (id_declarator->declarator
7641 && id_declarator->declarator->kind == cdk_id)
7643 sfk = id_declarator->declarator->u.id.sfk;
7644 if (sfk == sfk_destructor)
7651 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7652 tree decl = id_declarator->u.id.unqualified_name;
7655 if (qualifying_scope)
7657 if (at_function_scope_p ())
7661 A declarator-id shall not be qualified except
7664 None of the cases are permitted in block
7666 if (qualifying_scope == global_namespace)
7667 error ("invalid use of qualified-name %<::%D%>",
7669 else if (TYPE_P (qualifying_scope))
7670 error ("invalid use of qualified-name %<%T::%D%>",
7671 qualifying_scope, decl);
7673 error ("invalid use of qualified-name %<%D::%D%>",
7674 qualifying_scope, decl);
7675 return error_mark_node;
7677 else if (TYPE_P (qualifying_scope))
7679 ctype = qualifying_scope;
7680 if (innermost_code != cdk_function
7681 && current_class_type
7682 && !UNIQUELY_DERIVED_FROM_P (ctype,
7683 current_class_type))
7685 error ("type %qT is not derived from type %qT",
7686 ctype, current_class_type);
7687 return error_mark_node;
7690 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7691 in_namespace = qualifying_scope;
7693 switch (TREE_CODE (decl))
7699 if (innermost_code != cdk_function)
7701 error ("declaration of %qD as non-function", decl);
7702 return error_mark_node;
7704 else if (!qualifying_scope
7705 && !(current_class_type && at_class_scope_p ()))
7707 error ("declaration of %qD as non-member", decl);
7708 return error_mark_node;
7711 type = TREE_OPERAND (decl, 0);
7713 type = constructor_name (type);
7714 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7719 case TEMPLATE_ID_EXPR:
7721 tree fns = TREE_OPERAND (decl, 0);
7724 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7726 gcc_assert (is_overloaded_fn (dname));
7727 dname = DECL_NAME (get_first_fn (dname));
7732 case IDENTIFIER_NODE:
7733 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7736 if (C_IS_RESERVED_WORD (dname))
7738 error ("declarator-id missing; using reserved word %qD",
7740 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7742 else if (!IDENTIFIER_TYPENAME_P (dname))
7743 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7746 gcc_assert (flags == NO_SPECIAL);
7747 flags = TYPENAME_FLAG;
7748 ctor_return_type = TREE_TYPE (dname);
7749 sfk = sfk_conversion;
7750 if (is_typename_at_global_scope (dname))
7751 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7753 name = "<invalid operator>";
7770 return error_mark_node;
7775 if (id_declarator->kind == cdk_id)
7781 The declarator in a function-definition shall have the form
7782 D1 ( parameter-declaration-clause) ... */
7783 if (funcdef_flag && innermost_code != cdk_function)
7785 error ("function definition does not declare parameters");
7786 return error_mark_node;
7789 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7790 && innermost_code != cdk_function
7791 && ! (ctype && !declspecs->any_specifiers_p))
7793 error ("declaration of %qD as non-function", dname);
7794 return error_mark_node;
7797 /* Anything declared one level down from the top level
7798 must be one of the parameters of a function
7799 (because the body is at least two levels down). */
7801 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7802 by not allowing C++ class definitions to specify their parameters
7803 with xdecls (must be spec.d in the parmlist).
7805 Since we now wait to push a class scope until we are sure that
7806 we are in a legitimate method context, we must set oldcname
7807 explicitly (since current_class_name is not yet alive).
7809 We also want to avoid calling this a PARM if it is in a namespace. */
7811 if (decl_context == NORMAL && !toplevel_bindings_p ())
7813 struct cp_binding_level *b = current_binding_level;
7814 current_binding_level = b->level_chain;
7815 if (current_binding_level != 0 && toplevel_bindings_p ())
7816 decl_context = PARM;
7817 current_binding_level = b;
7821 name = decl_context == PARM ? "parameter" : "type name";
7823 /* If there were multiple types specified in the decl-specifier-seq,
7824 issue an error message. */
7825 if (declspecs->multiple_types_p)
7827 error ("two or more data types in declaration of %qs", name);
7828 return error_mark_node;
7831 if (declspecs->conflicting_specifiers_p)
7833 error ("conflicting specifiers in declaration of %qs", name);
7834 return error_mark_node;
7837 /* Extract the basic type from the decl-specifier-seq. */
7838 type = declspecs->type;
7839 if (type == error_mark_node)
7842 type_was_error_mark_node = true;
7844 /* If the entire declaration is itself tagged as deprecated then
7845 suppress reports of deprecated items. */
7846 if (type && TREE_DEPRECATED (type)
7847 && deprecated_state != DEPRECATED_SUPPRESS)
7848 warn_deprecated_use (type, NULL_TREE);
7849 if (type && TREE_CODE (type) == TYPE_DECL)
7851 typedef_decl = type;
7852 type = TREE_TYPE (typedef_decl);
7853 if (TREE_DEPRECATED (type)
7854 && DECL_ARTIFICIAL (typedef_decl)
7855 && deprecated_state != DEPRECATED_SUPPRESS)
7856 warn_deprecated_use (type, NULL_TREE);
7858 /* No type at all: default to `int', and set DEFAULTED_INT
7859 because it was not a user-defined typedef. */
7860 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7862 /* These imply 'int'. */
7863 type = integer_type_node;
7867 explicit_int = declspecs->explicit_int_p;
7868 explicit_char = declspecs->explicit_char_p;
7871 /* See the code below that used this. */
7873 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7875 typedef_type = type;
7878 if (sfk != sfk_conversion)
7879 ctor_return_type = ctype;
7881 if (sfk != sfk_none)
7882 type = check_special_function_return_type (sfk, type,
7884 else if (type == NULL_TREE)
7890 /* We handle `main' specially here, because 'main () { }' is so
7891 common. With no options, it is allowed. With -Wreturn-type,
7892 it is a warning. It is only an error with -pedantic-errors. */
7893 is_main = (funcdef_flag
7894 && dname && MAIN_NAME_P (dname)
7895 && ctype == NULL_TREE
7896 && in_namespace == NULL_TREE
7897 && current_namespace == global_namespace);
7899 if (type_was_error_mark_node)
7900 /* We've already issued an error, don't complain more. */;
7901 else if (in_system_header || flag_ms_extensions)
7902 /* Allow it, sigh. */;
7904 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7906 pedwarn (input_location, OPT_pedantic,
7907 "ISO C++ forbids declaration of %qs with no type", name);
7909 warning (OPT_Wreturn_type,
7910 "ISO C++ forbids declaration of %qs with no type", name);
7912 type = integer_type_node;
7917 /* Now process the modifiers that were specified
7918 and check for invalid combinations. */
7920 /* Long double is a special combination. */
7921 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7924 type = build_qualified_type (long_double_type_node,
7925 cp_type_quals (type));
7928 /* Check all other uses of type modifiers. */
7930 if (unsigned_p || signed_p || long_p || short_p)
7934 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7935 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7936 else if (signed_p && unsigned_p)
7937 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7938 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7939 error ("%<long long%> invalid for %qs", name);
7940 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7941 error ("%<long%> invalid for %qs", name);
7942 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7943 error ("%<short%> invalid for %qs", name);
7944 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7945 error ("%<long%> or %<short%> invalid for %qs", name);
7946 else if ((long_p || short_p) && explicit_char)
7947 error ("%<long%> or %<short%> specified with char for %qs", name);
7948 else if (long_p && short_p)
7949 error ("%<long%> and %<short%> specified together for %qs", name);
7950 else if (type == char16_type_node || type == char32_type_node)
7952 if (signed_p || unsigned_p)
7953 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7954 else if (short_p || long_p)
7955 error ("%<short%> or %<long%> invalid for %qs", name);
7960 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7962 pedwarn (input_location, OPT_pedantic,
7963 "long, short, signed or unsigned used invalidly for %qs",
7965 if (flag_pedantic_errors)
7970 /* Discard the type modifiers if they are invalid. */
7981 /* Decide whether an integer type is signed or not.
7982 Optionally treat bitfields as signed by default. */
7986 It is implementation-defined whether a plain (neither
7987 explicitly signed or unsigned) char, short, int, or long
7988 bit-field is signed or unsigned.
7990 Naturally, we extend this to long long as well. Note that
7991 this does not include wchar_t. */
7992 || (bitfield && !flag_signed_bitfields
7994 /* A typedef for plain `int' without `signed' can be
7995 controlled just like plain `int', but a typedef for
7996 `signed int' cannot be so controlled. */
7998 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7999 && TREE_CODE (type) == INTEGER_TYPE
8000 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8003 type = long_long_unsigned_type_node;
8005 type = long_unsigned_type_node;
8007 type = short_unsigned_type_node;
8008 else if (type == char_type_node)
8009 type = unsigned_char_type_node;
8010 else if (typedef_decl)
8011 type = unsigned_type_for (type);
8013 type = unsigned_type_node;
8015 else if (signed_p && type == char_type_node)
8016 type = signed_char_type_node;
8018 type = long_long_integer_type_node;
8020 type = long_integer_type_node;
8022 type = short_integer_type_node;
8024 if (declspecs->specs[(int)ds_complex])
8026 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8027 error ("complex invalid for %qs", name);
8028 /* If we just have "complex", it is equivalent to
8029 "complex double", but if any modifiers at all are specified it is
8030 the complex form of TYPE. E.g, "complex short" is
8031 "complex short int". */
8033 else if (defaulted_int && ! longlong
8034 && ! (long_p || short_p || signed_p || unsigned_p))
8035 type = complex_double_type_node;
8036 else if (type == integer_type_node)
8037 type = complex_integer_type_node;
8038 else if (type == float_type_node)
8039 type = complex_float_type_node;
8040 else if (type == double_type_node)
8041 type = complex_double_type_node;
8042 else if (type == long_double_type_node)
8043 type = complex_long_double_type_node;
8045 type = build_complex_type (type);
8048 type_quals = TYPE_UNQUALIFIED;
8049 if (declspecs->specs[(int)ds_const])
8050 type_quals |= TYPE_QUAL_CONST;
8051 if (declspecs->specs[(int)ds_volatile])
8052 type_quals |= TYPE_QUAL_VOLATILE;
8053 if (declspecs->specs[(int)ds_restrict])
8054 type_quals |= TYPE_QUAL_RESTRICT;
8055 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8056 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8059 if (TREE_CODE (type) == FUNCTION_TYPE
8060 && type_quals != TYPE_UNQUALIFIED)
8062 /* This was an error in C++98 (cv-qualifiers cannot be added to
8063 a function type), but DR 295 makes the code well-formed by
8064 dropping the extra qualifiers. */
8067 tree bad_type = build_qualified_type (type, type_quals);
8068 pedwarn (input_location, OPT_pedantic,
8069 "ignoring %qV qualifiers added to function type %qT",
8072 type_quals = TYPE_UNQUALIFIED;
8074 type_quals |= cp_type_quals (type);
8075 type = cp_build_qualified_type_real
8076 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8077 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8078 /* We might have ignored or rejected some of the qualifiers. */
8079 type_quals = cp_type_quals (type);
8082 inlinep = !! declspecs->specs[(int)ds_inline];
8083 virtualp = !! declspecs->specs[(int)ds_virtual];
8084 explicitp = !! declspecs->specs[(int)ds_explicit];
8086 storage_class = declspecs->storage_class;
8087 if (storage_class == sc_static)
8088 staticp = 1 + (decl_context == FIELD);
8090 if (virtualp && staticp == 2)
8092 error ("member %qD cannot be declared both virtual and static", dname);
8093 storage_class = sc_none;
8096 friendp = !! declspecs->specs[(int)ds_friend];
8098 if (dependent_name && !friendp)
8100 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8101 return error_mark_node;
8104 /* Issue errors about use of storage classes for parameters. */
8105 if (decl_context == PARM)
8107 if (declspecs->specs[(int)ds_typedef])
8109 error ("typedef declaration invalid in parameter declaration");
8110 return error_mark_node;
8112 else if (storage_class == sc_static
8113 || storage_class == sc_extern
8115 error ("storage class specifiers invalid in parameter declarations");
8117 if (type_uses_auto (type))
8119 error ("parameter declared %<auto%>");
8120 type = error_mark_node;
8124 /* Give error if `virtual' is used outside of class declaration. */
8126 && (current_class_name == NULL_TREE || decl_context != FIELD))
8128 error ("%<virtual%> outside class declaration");
8132 /* Static anonymous unions are dealt with here. */
8133 if (staticp && decl_context == TYPENAME
8135 && ANON_AGGR_TYPE_P (declspecs->type))
8136 decl_context = FIELD;
8138 /* Warn about storage classes that are invalid for certain
8139 kinds of declarations (parameters, typenames, etc.). */
8142 && storage_class != sc_extern
8143 && storage_class != sc_static)
8144 || declspecs->specs[(int)ds_typedef]))
8146 error ("multiple storage classes in declaration of %qs", name);
8149 if (decl_context != NORMAL
8150 && ((storage_class != sc_none
8151 && storage_class != sc_mutable)
8154 if ((decl_context == PARM || decl_context == CATCHPARM)
8155 && (storage_class == sc_register
8156 || storage_class == sc_auto))
8158 else if (declspecs->specs[(int)ds_typedef])
8160 else if (decl_context == FIELD
8161 /* C++ allows static class elements. */
8162 && storage_class == sc_static)
8163 /* C++ also allows inlines and signed and unsigned elements,
8164 but in those cases we don't come in here. */
8168 if (decl_context == FIELD)
8169 error ("storage class specified for %qs", name);
8172 if (decl_context == PARM || decl_context == CATCHPARM)
8173 error ("storage class specified for parameter %qs", name);
8175 error ("storage class specified for typename");
8177 if (storage_class == sc_register
8178 || storage_class == sc_auto
8179 || storage_class == sc_extern
8181 storage_class = sc_none;
8184 else if (storage_class == sc_extern && funcdef_flag
8185 && ! toplevel_bindings_p ())
8186 error ("nested function %qs declared %<extern%>", name);
8187 else if (toplevel_bindings_p ())
8189 if (storage_class == sc_auto)
8190 error ("top-level declaration of %qs specifies %<auto%>", name);
8193 && storage_class != sc_extern
8194 && storage_class != sc_static)
8196 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8201 if (storage_class && friendp)
8203 error ("storage class specifiers invalid in friend function declarations");
8204 storage_class = sc_none;
8209 unqualified_id = NULL_TREE;
8212 unqualified_id = id_declarator->u.id.unqualified_name;
8213 switch (TREE_CODE (unqualified_id))
8216 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8217 if (TYPE_P (unqualified_id))
8218 unqualified_id = constructor_name (unqualified_id);
8221 case IDENTIFIER_NODE:
8222 case TEMPLATE_ID_EXPR:
8230 /* Determine the type of the entity declared by recurring on the
8232 for (; declarator; declarator = declarator->declarator)
8234 const cp_declarator *inner_declarator;
8237 if (type == error_mark_node)
8238 return error_mark_node;
8240 attrs = declarator->attributes;
8246 if (declarator == NULL || declarator->kind == cdk_id)
8247 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8248 if (declarator->kind == cdk_function)
8249 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8250 if (declarator->kind == cdk_array)
8251 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8252 returned_attrs = decl_attributes (&type,
8253 chainon (returned_attrs, attrs),
8257 if (declarator->kind == cdk_id)
8260 inner_declarator = declarator->declarator;
8262 switch (declarator->kind)
8265 type = create_array_type_for_decl (dname, type,
8266 declarator->u.array.bounds);
8274 /* Declaring a function type.
8275 Make sure we have a valid type for the function to return. */
8277 if (type_quals != TYPE_UNQUALIFIED)
8279 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8280 warning (OPT_Wignored_qualifiers,
8281 "type qualifiers ignored on function return type");
8282 /* We now know that the TYPE_QUALS don't apply to the
8283 decl, but to its return type. */
8284 type_quals = TYPE_UNQUALIFIED;
8285 set_no_warning = true;
8287 errmsg = targetm.invalid_return_type (type);
8291 type = integer_type_node;
8294 /* Error about some types functions can't return. */
8296 if (TREE_CODE (type) == FUNCTION_TYPE)
8298 error ("%qs declared as function returning a function", name);
8299 return error_mark_node;
8301 if (TREE_CODE (type) == ARRAY_TYPE)
8303 error ("%qs declared as function returning an array", name);
8304 return error_mark_node;
8307 /* Pick up type qualifiers which should be applied to `this'. */
8308 memfn_quals = declarator->u.function.qualifiers;
8310 /* Pick up the exception specifications. */
8311 raises = declarator->u.function.exception_specification;
8313 /* Say it's a definition only for the CALL_EXPR
8314 closest to the identifier. */
8315 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8317 /* Handle a late-specified return type. */
8320 if (type_uses_auto (type))
8322 if (!declarator->u.function.late_return_type)
8324 error ("%qs function uses %<auto%> type specifier without"
8325 " late return type", name);
8326 return error_mark_node;
8328 else if (!is_auto (type))
8330 error ("%qs function with late return type has"
8331 " %qT as its type rather than plain %<auto%>",
8333 return error_mark_node;
8336 else if (declarator->u.function.late_return_type)
8338 error ("%qs function with late return type not declared"
8339 " with %<auto%> type specifier", name);
8340 return error_mark_node;
8343 type = splice_late_return_type
8344 (type, declarator->u.function.late_return_type);
8345 if (type == error_mark_node)
8346 return error_mark_node;
8348 if (ctype == NULL_TREE
8349 && decl_context == FIELD
8351 && (friendp == 0 || dname == current_class_name))
8352 ctype = current_class_type;
8354 if (ctype && (sfk == sfk_constructor
8355 || sfk == sfk_destructor))
8357 /* We are within a class's scope. If our declarator name
8358 is the same as the class name, and we are defining
8359 a function, then it is a constructor/destructor, and
8360 therefore returns a void type. */
8362 /* ISO C++ 12.4/2. A destructor may not be declared
8363 const or volatile. A destructor may not be
8366 ISO C++ 12.1. A constructor may not be declared
8367 const or volatile. A constructor may not be
8368 virtual. A constructor may not be static. */
8370 error ((flags == DTOR_FLAG)
8371 ? "destructor cannot be static member function"
8372 : "constructor cannot be static member function");
8375 error ((flags == DTOR_FLAG)
8376 ? "destructors may not be cv-qualified"
8377 : "constructors may not be cv-qualified");
8378 memfn_quals = TYPE_UNQUALIFIED;
8381 if (decl_context == FIELD
8382 && !member_function_or_else (ctype,
8385 return error_mark_node;
8387 if (flags != DTOR_FLAG)
8389 /* It's a constructor. */
8394 permerror (input_location, "constructors cannot be declared virtual");
8397 if (decl_context == FIELD
8398 && sfk != sfk_constructor)
8399 return error_mark_node;
8401 if (decl_context == FIELD)
8407 error ("can't initialize friend function %qs", name);
8410 /* Cannot be both friend and virtual. */
8411 error ("virtual functions cannot be friends");
8414 if (decl_context == NORMAL)
8415 error ("friend declaration not in class definition");
8416 if (current_function_decl && funcdef_flag)
8417 error ("can't define friend function %qs in a local "
8421 else if (ctype && sfk == sfk_conversion)
8425 maybe_warn_cpp0x ("explicit conversion operators");
8430 arg_types = grokparms (declarator->u.function.parameters,
8433 if (inner_declarator
8434 && inner_declarator->kind == cdk_id
8435 && inner_declarator->u.id.sfk == sfk_destructor
8436 && arg_types != void_list_node)
8438 error ("destructors may not have parameters");
8439 arg_types = void_list_node;
8443 type = build_function_type (type, arg_types);
8450 /* Filter out pointers-to-references and references-to-references.
8451 We can get these if a TYPE_DECL is used. */
8453 if (TREE_CODE (type) == REFERENCE_TYPE)
8455 if (declarator->kind != cdk_reference)
8457 error ("cannot declare pointer to %q#T", type);
8458 type = TREE_TYPE (type);
8461 /* In C++0x, we allow reference to reference declarations
8462 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8463 and template type arguments [14.3.1/4 temp.arg.type]. The
8464 check for direct reference to reference declarations, which
8465 are still forbidden, occurs below. Reasoning behind the change
8466 can be found in DR106, DR540, and the rvalue reference
8468 else if (cxx_dialect == cxx98)
8470 error ("cannot declare reference to %q#T", type);
8471 type = TREE_TYPE (type);
8474 else if (VOID_TYPE_P (type))
8476 if (declarator->kind == cdk_reference)
8477 error ("cannot declare reference to %q#T", type);
8478 else if (declarator->kind == cdk_ptrmem)
8479 error ("cannot declare pointer to %q#T member", type);
8482 /* We now know that the TYPE_QUALS don't apply to the decl,
8483 but to the target of the pointer. */
8484 type_quals = TYPE_UNQUALIFIED;
8486 if (declarator->kind == cdk_ptrmem
8487 && (TREE_CODE (type) == FUNCTION_TYPE
8488 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8490 memfn_quals |= cp_type_quals (type);
8491 type = build_memfn_type (type,
8492 declarator->u.pointer.class_type,
8494 memfn_quals = TYPE_UNQUALIFIED;
8497 if (TREE_CODE (type) == FUNCTION_TYPE
8498 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8499 error ("cannot declare %s to qualified function type %qT",
8500 declarator->kind == cdk_reference ? "reference" : "pointer",
8503 if (declarator->kind == cdk_reference)
8505 /* In C++0x, the type we are creating a reference to might be
8506 a typedef which is itself a reference type. In that case,
8507 we follow the reference collapsing rules in
8508 [7.1.3/8 dcl.typedef] to create the final reference type:
8510 "If a typedef TD names a type that is a reference to a type
8511 T, an attempt to create the type 'lvalue reference to cv TD'
8512 creates the type 'lvalue reference to T,' while an attempt
8513 to create the type "rvalue reference to cv TD' creates the
8516 if (!VOID_TYPE_P (type))
8517 type = cp_build_reference_type
8518 ((TREE_CODE (type) == REFERENCE_TYPE
8519 ? TREE_TYPE (type) : type),
8520 (declarator->u.reference.rvalue_ref
8521 && (TREE_CODE(type) != REFERENCE_TYPE
8522 || TYPE_REF_IS_RVALUE (type))));
8524 /* In C++0x, we need this check for direct reference to
8525 reference declarations, which are forbidden by
8526 [8.3.2/5 dcl.ref]. Reference to reference declarations
8527 are only allowed indirectly through typedefs and template
8528 type arguments. Example:
8530 void foo(int & &); // invalid ref-to-ref decl
8532 typedef int & int_ref;
8533 void foo(int_ref &); // valid ref-to-ref decl
8535 if (inner_declarator && inner_declarator->kind == cdk_reference)
8536 error ("cannot declare reference to %q#T, which is not "
8537 "a typedef or a template type argument", type);
8539 else if (TREE_CODE (type) == METHOD_TYPE)
8540 type = build_ptrmemfunc_type (build_pointer_type (type));
8541 else if (declarator->kind == cdk_ptrmem)
8543 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8545 if (declarator->u.pointer.class_type == error_mark_node)
8546 /* We will already have complained. */
8547 type = error_mark_node;
8549 type = build_ptrmem_type (declarator->u.pointer.class_type,
8553 type = build_pointer_type (type);
8555 /* Process a list of type modifier keywords (such as
8556 const or volatile) that were given inside the `*' or `&'. */
8558 if (declarator->u.pointer.qualifiers)
8561 = cp_build_qualified_type (type,
8562 declarator->u.pointer.qualifiers);
8563 type_quals = cp_type_quals (type);
8576 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8577 && TREE_CODE (type) != FUNCTION_TYPE
8578 && TREE_CODE (type) != METHOD_TYPE)
8580 error ("template-id %qD used as a declarator",
8582 unqualified_id = dname;
8585 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8586 qualified with a class-name, turn it into a METHOD_TYPE, unless
8587 we know that the function is static. We take advantage of this
8588 opportunity to do other processing that pertains to entities
8589 explicitly declared to be class members. Note that if DECLARATOR
8590 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8591 would not have exited the loop above. */
8593 && declarator->u.id.qualifying_scope
8594 && TYPE_P (declarator->u.id.qualifying_scope))
8598 ctype = declarator->u.id.qualifying_scope;
8599 ctype = TYPE_MAIN_VARIANT (ctype);
8601 while (t != NULL_TREE && CLASS_TYPE_P (t))
8603 /* You're supposed to have one `template <...>' for every
8604 template class, but you don't need one for a full
8605 specialization. For example:
8607 template <class T> struct S{};
8608 template <> struct S<int> { void f(); };
8609 void S<int>::f () {}
8611 is correct; there shouldn't be a `template <>' for the
8612 definition of `S<int>::f'. */
8613 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8614 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8615 /* T is an explicit (not partial) specialization. All
8616 containing classes must therefore also be explicitly
8619 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8620 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8621 template_count += 1;
8623 t = TYPE_MAIN_DECL (t);
8624 t = DECL_CONTEXT (t);
8627 if (ctype == current_class_type)
8631 permerror (input_location, "member functions are implicitly friends of their class");
8635 permerror (declarator->id_loc,
8636 "extra qualification %<%T::%> on member %qs",
8639 else if (/* If the qualifying type is already complete, then we
8640 can skip the following checks. */
8641 !COMPLETE_TYPE_P (ctype)
8642 && (/* If the function is being defined, then
8643 qualifying type must certainly be complete. */
8645 /* A friend declaration of "T::f" is OK, even if
8646 "T" is a template parameter. But, if this
8647 function is not a friend, the qualifying type
8649 || (!friendp && !CLASS_TYPE_P (ctype))
8650 /* For a declaration, the type need not be
8651 complete, if either it is dependent (since there
8652 is no meaningful definition of complete in that
8653 case) or the qualifying class is currently being
8655 || !(dependent_type_p (ctype)
8656 || currently_open_class (ctype)))
8657 /* Check that the qualifying type is complete. */
8658 && !complete_type_or_else (ctype, NULL_TREE))
8659 return error_mark_node;
8660 else if (TREE_CODE (type) == FUNCTION_TYPE)
8662 tree sname = declarator->u.id.unqualified_name;
8664 if (current_class_type
8665 && (!friendp || funcdef_flag))
8668 ? "cannot define member function %<%T::%s%> within %<%T%>"
8669 : "cannot declare member function %<%T::%s%> within %<%T%>",
8670 ctype, name, current_class_type);
8671 return error_mark_node;
8674 if (TREE_CODE (sname) == IDENTIFIER_NODE
8675 && NEW_DELETE_OPNAME_P (sname))
8676 /* Overloaded operator new and operator delete
8677 are always static functions. */
8680 type = build_memfn_type (type, ctype, memfn_quals);
8682 else if (declspecs->specs[(int)ds_typedef]
8683 && current_class_type)
8685 error ("cannot declare member %<%T::%s%> within %qT",
8686 ctype, name, current_class_type);
8687 return error_mark_node;
8691 /* Now TYPE has the actual type. */
8696 *attrlist = chainon (returned_attrs, *attrlist);
8698 attrlist = &returned_attrs;
8701 /* Handle parameter packs. */
8702 if (parameter_pack_p)
8704 if (decl_context == PARM)
8705 /* Turn the type into a pack expansion.*/
8706 type = make_pack_expansion (type);
8708 error ("non-parameter %qs cannot be a parameter pack", name);
8711 /* Did array size calculations overflow? */
8713 if (TREE_CODE (type) == ARRAY_TYPE
8714 && COMPLETE_TYPE_P (type)
8715 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8716 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8718 error ("size of array %qs is too large", name);
8719 /* If we proceed with the array type as it is, we'll eventually
8720 crash in tree_low_cst(). */
8721 type = error_mark_node;
8724 if ((decl_context == FIELD || decl_context == PARM)
8725 && !processing_template_decl
8726 && variably_modified_type_p (type, NULL_TREE))
8728 if (decl_context == FIELD)
8729 error ("data member may not have variably modified type %qT", type);
8731 error ("parameter may not have variably modified type %qT", type);
8732 type = error_mark_node;
8735 if (explicitp == 1 || (explicitp && friendp))
8737 /* [dcl.fct.spec] The explicit specifier shall only be used in
8738 declarations of constructors within a class definition. */
8739 error ("only declarations of constructors can be %<explicit%>");
8743 if (storage_class == sc_mutable)
8745 if (decl_context != FIELD || friendp)
8747 error ("non-member %qs cannot be declared %<mutable%>", name);
8748 storage_class = sc_none;
8750 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8752 error ("non-object member %qs cannot be declared %<mutable%>", name);
8753 storage_class = sc_none;
8755 else if (TREE_CODE (type) == FUNCTION_TYPE
8756 || TREE_CODE (type) == METHOD_TYPE)
8758 error ("function %qs cannot be declared %<mutable%>", name);
8759 storage_class = sc_none;
8763 error ("static %qs cannot be declared %<mutable%>", name);
8764 storage_class = sc_none;
8766 else if (type_quals & TYPE_QUAL_CONST)
8768 error ("const %qs cannot be declared %<mutable%>", name);
8769 storage_class = sc_none;
8773 /* If this is declaring a typedef name, return a TYPE_DECL. */
8774 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8778 /* Note that the grammar rejects storage classes
8779 in typenames, fields or parameters. */
8780 if (current_lang_name == lang_name_java)
8781 TYPE_FOR_JAVA (type) = 1;
8783 /* This declaration:
8785 typedef void f(int) const;
8787 declares a function type which is not a member of any
8788 particular class, but which is cv-qualified; for
8789 example "f S::*" declares a pointer to a const-qualified
8790 member function of S. We record the cv-qualification in the
8792 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8794 type = cp_build_qualified_type (type, memfn_quals);
8796 /* We have now dealt with these qualifiers. */
8797 memfn_quals = TYPE_UNQUALIFIED;
8800 if (decl_context == FIELD)
8801 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8803 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8804 if (id_declarator && declarator->u.id.qualifying_scope) {
8805 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8806 TREE_TYPE (decl) = error_mark_node;
8809 if (decl_context != FIELD)
8811 if (!current_function_decl)
8812 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8813 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8814 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8815 (current_function_decl)))
8816 /* The TYPE_DECL is "abstract" because there will be
8817 clones of this constructor/destructor, and there will
8818 be copies of this TYPE_DECL generated in those
8820 DECL_ABSTRACT (decl) = 1;
8822 else if (constructor_name_p (unqualified_id, current_class_type))
8823 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8824 "as enclosing class",
8827 /* If the user declares "typedef struct {...} foo" then the
8828 struct will have an anonymous name. Fill that name in now.
8829 Nothing can refer to it, so nothing needs know about the name
8831 if (type != error_mark_node
8834 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8835 && TYPE_ANONYMOUS_P (type)
8836 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8840 /* Replace the anonymous name with the real name everywhere. */
8841 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8843 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8845 debug_hooks->set_name (t, decl);
8846 TYPE_NAME (t) = decl;
8850 if (TYPE_LANG_SPECIFIC (type))
8851 TYPE_WAS_ANONYMOUS (type) = 1;
8853 /* If this is a typedef within a template class, the nested
8854 type is a (non-primary) template. The name for the
8855 template needs updating as well. */
8856 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8857 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8858 = TYPE_IDENTIFIER (type);
8860 /* FIXME remangle member functions; member functions of a
8861 type with external linkage have external linkage. */
8865 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8866 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8868 bad_specifiers (decl, "type", virtualp,
8869 memfn_quals != TYPE_UNQUALIFIED,
8870 inlinep, friendp, raises != NULL_TREE);
8875 /* Detect the case of an array type of unspecified size
8876 which came, as such, direct from a typedef name.
8877 We must copy the type, so that the array's domain can be
8878 individually set by the object's initializer. */
8880 if (type && typedef_type
8881 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8882 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8883 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8885 /* Detect where we're using a typedef of function type to declare a
8886 function. PARMS will not be set, so we must create it now. */
8888 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8890 tree decls = NULL_TREE;
8893 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8895 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8897 TREE_CHAIN (decl) = decls;
8901 parms = nreverse (decls);
8903 if (decl_context != TYPENAME)
8905 /* A cv-qualifier-seq shall only be part of the function type
8906 for a non-static member function. [8.3.5/4 dcl.fct] */
8907 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8908 && (current_class_type == NULL_TREE || staticp) )
8911 ? G_("qualified function types cannot be used to "
8912 "declare static member functions")
8913 : G_("qualified function types cannot be used to "
8914 "declare free functions"));
8915 type = TYPE_MAIN_VARIANT (type);
8918 /* The qualifiers on the function type become the qualifiers on
8919 the non-static member function. */
8920 memfn_quals |= cp_type_quals (type);
8924 /* If this is a type name (such as, in a cast or sizeof),
8925 compute the type and return it now. */
8927 if (decl_context == TYPENAME)
8929 /* Note that the grammar rejects storage classes
8930 in typenames, fields or parameters. */
8931 if (type_quals != TYPE_UNQUALIFIED)
8932 type_quals = TYPE_UNQUALIFIED;
8934 /* Special case: "friend class foo" looks like a TYPENAME context. */
8937 if (type_quals != TYPE_UNQUALIFIED)
8939 error ("type qualifiers specified for friend class declaration");
8940 type_quals = TYPE_UNQUALIFIED;
8944 error ("%<inline%> specified for friend class declaration");
8950 /* Don't allow friend declaration without a class-key. */
8951 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8952 permerror (input_location, "template parameters cannot be friends");
8953 else if (TREE_CODE (type) == TYPENAME_TYPE)
8954 permerror (input_location, "friend declaration requires class-key, "
8955 "i.e. %<friend class %T::%D%>",
8956 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8958 permerror (input_location, "friend declaration requires class-key, "
8959 "i.e. %<friend %#T%>",
8963 /* Only try to do this stuff if we didn't already give up. */
8964 if (type != integer_type_node)
8966 /* A friendly class? */
8967 if (current_class_type)
8968 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8971 error ("trying to make class %qT a friend of global scope",
8974 type = void_type_node;
8977 else if (memfn_quals)
8979 if (ctype == NULL_TREE
8980 && TREE_CODE (type) == METHOD_TYPE)
8981 ctype = TYPE_METHOD_BASETYPE (type);
8984 type = build_memfn_type (type, ctype, memfn_quals);
8985 /* Core issue #547: need to allow this in template type args. */
8986 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8987 type = cp_build_qualified_type (type, memfn_quals);
8989 error ("invalid qualifiers on non-member function type");
8994 else if (unqualified_id == NULL_TREE && decl_context != PARM
8995 && decl_context != CATCHPARM
8996 && TREE_CODE (type) != UNION_TYPE
8999 error ("abstract declarator %qT used as declaration", type);
9000 return error_mark_node;
9003 /* Only functions may be declared using an operator-function-id. */
9005 && IDENTIFIER_OPNAME_P (unqualified_id)
9006 && TREE_CODE (type) != FUNCTION_TYPE
9007 && TREE_CODE (type) != METHOD_TYPE)
9009 error ("declaration of %qD as non-function", unqualified_id);
9010 return error_mark_node;
9013 /* We don't check parameter types here because we can emit a better
9014 error message later. */
9015 if (decl_context != PARM)
9017 type = check_var_type (unqualified_id, type);
9018 if (type == error_mark_node)
9019 return error_mark_node;
9022 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9023 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9025 if (decl_context == PARM || decl_context == CATCHPARM)
9027 if (ctype || in_namespace)
9028 error ("cannot use %<::%> in parameter declaration");
9030 /* A parameter declared as an array of T is really a pointer to T.
9031 One declared as a function is really a pointer to a function.
9032 One declared as a member is really a pointer to member. */
9034 if (TREE_CODE (type) == ARRAY_TYPE)
9036 /* Transfer const-ness of array into that of type pointed to. */
9037 type = build_pointer_type (TREE_TYPE (type));
9038 type_quals = TYPE_UNQUALIFIED;
9040 else if (TREE_CODE (type) == FUNCTION_TYPE)
9041 type = build_pointer_type (type);
9047 if (decl_context == PARM)
9049 decl = cp_build_parm_decl (unqualified_id, type);
9051 bad_specifiers (decl, "parameter", virtualp,
9052 memfn_quals != TYPE_UNQUALIFIED,
9053 inlinep, friendp, raises != NULL_TREE);
9055 else if (decl_context == FIELD)
9057 /* The C99 flexible array extension. */
9058 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9059 && TYPE_DOMAIN (type) == NULL_TREE)
9061 tree itype = compute_array_index_type (dname, integer_zero_node);
9062 type = build_cplus_array_type (TREE_TYPE (type), itype);
9065 if (type == error_mark_node)
9067 /* Happens when declaring arrays of sizes which
9068 are error_mark_node, for example. */
9071 else if (in_namespace && !friendp)
9073 /* Something like struct S { int N::j; }; */
9074 error ("invalid use of %<::%>");
9075 return error_mark_node;
9077 else if (TREE_CODE (type) == FUNCTION_TYPE)
9080 tree function_context;
9084 if (ctype == NULL_TREE)
9085 ctype = current_class_type;
9087 if (ctype == NULL_TREE)
9089 error ("can't make %qD into a method -- not in a class",
9091 return error_mark_node;
9094 /* ``A union may [ ... ] not [ have ] virtual functions.''
9096 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9098 error ("function %qD declared virtual inside a union",
9100 return error_mark_node;
9103 if (NEW_DELETE_OPNAME_P (unqualified_id))
9107 error ("%qD cannot be declared virtual, since it "
9113 else if (staticp < 2)
9114 type = build_memfn_type (type, ctype, memfn_quals);
9117 /* Check that the name used for a destructor makes sense. */
9118 if (sfk == sfk_destructor)
9120 tree uqname = id_declarator->u.id.unqualified_name;
9124 gcc_assert (friendp);
9125 error ("expected qualified name in friend declaration "
9126 "for destructor %qD", uqname);
9127 return error_mark_node;
9130 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9132 error ("declaration of %qD as member of %qT",
9134 return error_mark_node;
9137 else if (sfk == sfk_constructor && friendp)
9139 error ("expected qualified name in friend declaration "
9140 "for constructor %qD",
9141 id_declarator->u.id.unqualified_name);
9142 return error_mark_node;
9145 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9146 function_context = (ctype != NULL_TREE) ?
9147 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9148 publicp = (! friendp || ! staticp)
9149 && function_context == NULL_TREE;
9150 decl = grokfndecl (ctype, type,
9151 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9152 ? unqualified_id : dname,
9155 virtualp, flags, memfn_quals, raises,
9156 friendp ? -1 : 0, friendp, publicp, inlinep,
9158 funcdef_flag, template_count, in_namespace,
9159 attrlist, declarator->id_loc);
9160 if (decl == NULL_TREE)
9161 return error_mark_node;
9163 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9164 /* The decl and setting of decl_attr is also turned off. */
9165 decl = build_decl_attribute_variant (decl, decl_attr);
9168 /* [class.conv.ctor]
9170 A constructor declared without the function-specifier
9171 explicit that can be called with a single parameter
9172 specifies a conversion from the type of its first
9173 parameter to the type of its class. Such a constructor
9174 is called a converting constructor. */
9176 DECL_NONCONVERTING_P (decl) = 1;
9178 else if (TREE_CODE (type) == METHOD_TYPE)
9180 /* We only get here for friend declarations of
9181 members of other classes. */
9182 /* All method decls are public, so tell grokfndecl to set
9183 TREE_PUBLIC, also. */
9184 decl = grokfndecl (ctype, type,
9185 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9186 ? unqualified_id : dname,
9189 virtualp, flags, memfn_quals, raises,
9190 friendp ? -1 : 0, friendp, 1, 0, sfk,
9191 funcdef_flag, template_count, in_namespace,
9193 declarator->id_loc);
9194 if (decl == NULL_TREE)
9195 return error_mark_node;
9197 else if (!staticp && !dependent_type_p (type)
9198 && !COMPLETE_TYPE_P (complete_type (type))
9199 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9202 error ("field %qD has incomplete type", unqualified_id);
9204 error ("name %qT has incomplete type", type);
9206 /* If we're instantiating a template, tell them which
9207 instantiation made the field's type be incomplete. */
9208 if (current_class_type
9209 && TYPE_NAME (current_class_type)
9210 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9212 && declspecs->type == type)
9213 error (" in instantiation of template %qT",
9214 current_class_type);
9216 return error_mark_node;
9222 error ("%qE is neither function nor member function; "
9223 "cannot be declared friend", unqualified_id);
9231 /* Friends are treated specially. */
9232 if (ctype == current_class_type)
9233 ; /* We already issued a permerror. */
9234 else if (decl && DECL_NAME (decl))
9236 if (template_class_depth (current_class_type) == 0)
9238 decl = check_explicit_specialization
9239 (unqualified_id, decl, template_count,
9240 2 * funcdef_flag + 4);
9241 if (decl == error_mark_node)
9242 return error_mark_node;
9245 decl = do_friend (ctype, unqualified_id, decl,
9251 return error_mark_node;
9254 /* Structure field. It may not be a function, except for C++. */
9256 if (decl == NULL_TREE)
9262 /* An attempt is being made to initialize a non-static
9263 member. But, from [class.mem]:
9265 4 A member-declarator can contain a
9266 constant-initializer only if it declares a static
9267 member (_class.static_) of integral or enumeration
9268 type, see _class.static.data_.
9270 This used to be relatively common practice, but
9271 the rest of the compiler does not correctly
9272 handle the initialization unless the member is
9273 static so we make it static below. */
9274 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9276 permerror (input_location, "making %qD static", unqualified_id);
9280 if (uses_template_parms (type))
9281 /* We'll check at instantiation time. */
9283 else if (check_static_variable_definition (unqualified_id,
9285 /* If we just return the declaration, crashes
9286 will sometimes occur. We therefore return
9287 void_type_node, as if this was a friend
9288 declaration, to cause callers to completely
9289 ignore this declaration. */
9290 return error_mark_node;
9295 /* C++ allows static class members. All other work
9296 for this is done by grokfield. */
9297 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9298 set_linkage_for_static_data_member (decl);
9299 /* Even if there is an in-class initialization, DECL
9300 is considered undefined until an out-of-class
9301 definition is provided. */
9302 DECL_EXTERNAL (decl) = 1;
9305 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9309 decl = build_decl (input_location,
9310 FIELD_DECL, unqualified_id, type);
9311 DECL_NONADDRESSABLE_P (decl) = bitfield;
9312 if (bitfield && !unqualified_id)
9313 TREE_NO_WARNING (decl) = 1;
9315 if (storage_class == sc_mutable)
9317 DECL_MUTABLE_P (decl) = 1;
9318 storage_class = sc_none;
9322 bad_specifiers (decl, "field", virtualp,
9323 memfn_quals != TYPE_UNQUALIFIED,
9324 inlinep, friendp, raises != NULL_TREE);
9327 else if (TREE_CODE (type) == FUNCTION_TYPE
9328 || TREE_CODE (type) == METHOD_TYPE)
9333 if (!unqualified_id)
9334 return error_mark_node;
9336 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9337 original_name = dname;
9339 original_name = unqualified_id;
9341 if (storage_class == sc_auto)
9342 error ("storage class %<auto%> invalid for function %qs", name);
9343 else if (storage_class == sc_register)
9344 error ("storage class %<register%> invalid for function %qs", name);
9346 error ("storage class %<__thread%> invalid for function %qs", name);
9348 /* Function declaration not at top level.
9349 Storage classes other than `extern' are not allowed
9350 and `extern' makes no difference. */
9351 if (! toplevel_bindings_p ()
9352 && (storage_class == sc_static
9353 || declspecs->specs[(int)ds_inline])
9356 if (storage_class == sc_static)
9357 pedwarn (input_location, OPT_pedantic,
9358 "%<static%> specified invalid for function %qs "
9359 "declared out of global scope", name);
9361 pedwarn (input_location, OPT_pedantic,
9362 "%<inline%> specifier invalid for function %qs "
9363 "declared out of global scope", name);
9366 if (ctype != NULL_TREE
9367 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9369 error ("%q#T is not a class or a namespace", ctype);
9373 if (ctype == NULL_TREE)
9377 error ("virtual non-class function %qs", name);
9380 else if (sfk == sfk_constructor
9381 || sfk == sfk_destructor)
9384 ? "%qs defined in a non-class scope"
9385 : "%qs declared in a non-class scope", name);
9389 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9390 && !NEW_DELETE_OPNAME_P (original_name))
9391 type = build_method_type_directly (ctype,
9393 TYPE_ARG_TYPES (type));
9395 /* Record presence of `static'. */
9396 publicp = (ctype != NULL_TREE
9397 || storage_class == sc_extern
9398 || storage_class != sc_static);
9400 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9401 virtualp, flags, memfn_quals, raises,
9403 publicp, inlinep, sfk, funcdef_flag,
9404 template_count, in_namespace, attrlist,
9405 declarator->id_loc);
9406 if (decl == NULL_TREE)
9407 return error_mark_node;
9411 int invalid_static = 0;
9413 /* Don't allow a static member function in a class, and forbid
9414 declaring main to be static. */
9415 if (TREE_CODE (type) == METHOD_TYPE)
9417 permerror (input_location, "cannot declare member function %qD to have "
9418 "static linkage", decl);
9421 else if (current_function_decl)
9423 /* FIXME need arm citation */
9424 error ("cannot declare static function inside another function");
9431 storage_class = sc_none;
9437 /* It's a variable. */
9439 /* An uninitialized decl with `extern' is a reference. */
9440 decl = grokvardecl (type, unqualified_id,
9443 (type_quals & TYPE_QUAL_CONST) != 0,
9444 ctype ? ctype : in_namespace);
9445 bad_specifiers (decl, "variable", virtualp,
9446 memfn_quals != TYPE_UNQUALIFIED,
9447 inlinep, friendp, raises != NULL_TREE);
9451 DECL_CONTEXT (decl) = ctype;
9454 permerror (input_location, "%<static%> may not be used when defining "
9455 "(as opposed to declaring) a static data member");
9457 storage_class = sc_none;
9459 if (storage_class == sc_register && TREE_STATIC (decl))
9461 error ("static member %qD declared %<register%>", decl);
9462 storage_class = sc_none;
9464 if (storage_class == sc_extern && pedantic)
9466 pedwarn (input_location, OPT_pedantic,
9467 "cannot explicitly declare member %q#D to have "
9468 "extern linkage", decl);
9469 storage_class = sc_none;
9474 if (storage_class == sc_extern && initialized && !funcdef_flag)
9476 if (toplevel_bindings_p ())
9478 /* It's common practice (and completely valid) to have a const
9479 be initialized and declared extern. */
9480 if (!(type_quals & TYPE_QUAL_CONST))
9481 warning (0, "%qs initialized and declared %<extern%>", name);
9485 error ("%qs has both %<extern%> and initializer", name);
9486 return error_mark_node;
9490 /* Record `register' declaration for warnings on &
9491 and in case doing stupid register allocation. */
9493 if (storage_class == sc_register)
9494 DECL_REGISTER (decl) = 1;
9495 else if (storage_class == sc_extern)
9496 DECL_THIS_EXTERN (decl) = 1;
9497 else if (storage_class == sc_static)
9498 DECL_THIS_STATIC (decl) = 1;
9500 /* Record constancy and volatility on the DECL itself . There's
9501 no need to do this when processing a template; we'll do this
9502 for the instantiated declaration based on the type of DECL. */
9503 if (!processing_template_decl)
9504 cp_apply_type_quals_to_decl (type_quals, decl);
9507 TREE_NO_WARNING (decl) = 1;
9513 /* Subroutine of start_function. Ensure that each of the parameter
9514 types (as listed in PARMS) is complete, as is required for a
9515 function definition. */
9518 require_complete_types_for_parms (tree parms)
9520 for (; parms; parms = TREE_CHAIN (parms))
9522 if (dependent_type_p (TREE_TYPE (parms)))
9524 if (!VOID_TYPE_P (TREE_TYPE (parms))
9525 && complete_type_or_else (TREE_TYPE (parms), parms))
9527 relayout_decl (parms);
9528 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9531 /* grokparms or complete_type_or_else will have already issued
9533 TREE_TYPE (parms) = error_mark_node;
9537 /* Returns nonzero if T is a local variable. */
9540 local_variable_p (const_tree t)
9542 if ((TREE_CODE (t) == VAR_DECL
9543 /* A VAR_DECL with a context that is a _TYPE is a static data
9545 && !TYPE_P (CP_DECL_CONTEXT (t))
9546 /* Any other non-local variable must be at namespace scope. */
9547 && !DECL_NAMESPACE_SCOPE_P (t))
9548 || (TREE_CODE (t) == PARM_DECL))
9554 /* Like local_variable_p, but suitable for use as a tree-walking
9558 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9559 void *data ATTRIBUTE_UNUSED)
9561 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9563 else if (TYPE_P (*tp))
9570 /* Check that ARG, which is a default-argument expression for a
9571 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9572 something goes wrong. DECL may also be a _TYPE node, rather than a
9573 DECL, if there is no DECL available. */
9576 check_default_argument (tree decl, tree arg)
9581 if (TREE_CODE (arg) == DEFAULT_ARG)
9582 /* We get a DEFAULT_ARG when looking at an in-class declaration
9583 with a default argument. Ignore the argument for now; we'll
9584 deal with it after the class is complete. */
9593 decl_type = TREE_TYPE (decl);
9595 if (arg == error_mark_node
9596 || decl == error_mark_node
9597 || TREE_TYPE (arg) == error_mark_node
9598 || decl_type == error_mark_node)
9599 /* Something already went wrong. There's no need to check
9601 return error_mark_node;
9603 /* [dcl.fct.default]
9605 A default argument expression is implicitly converted to the
9607 if (!TREE_TYPE (arg)
9608 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9611 error ("default argument for %q#D has type %qT",
9612 decl, TREE_TYPE (arg));
9614 error ("default argument for parameter of type %qT has type %qT",
9615 decl_type, TREE_TYPE (arg));
9617 return error_mark_node;
9620 /* [dcl.fct.default]
9622 Local variables shall not be used in default argument
9625 The keyword `this' shall not be used in a default argument of a
9627 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9630 error ("default argument %qE uses local variable %qD", arg, var);
9631 return error_mark_node;
9638 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9641 type_is_deprecated (tree type)
9643 enum tree_code code;
9644 if (TREE_DEPRECATED (type))
9646 if (TYPE_NAME (type)
9647 && TREE_DEPRECATED (TYPE_NAME (type)))
9650 code = TREE_CODE (type);
9652 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9653 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9654 || code == METHOD_TYPE || code == ARRAY_TYPE)
9655 return type_is_deprecated (TREE_TYPE (type));
9657 if (TYPE_PTRMEMFUNC_P (type))
9658 return type_is_deprecated
9659 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9664 /* Decode the list of parameter types for a function type.
9665 Given the list of things declared inside the parens,
9666 return a list of types.
9668 If this parameter does not end with an ellipsis, we append
9671 *PARMS is set to the chain of PARM_DECLs created. */
9674 grokparms (tree parmlist, tree *parms)
9676 tree result = NULL_TREE;
9677 tree decls = NULL_TREE;
9681 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9683 tree type = NULL_TREE;
9684 tree init = TREE_PURPOSE (parm);
9685 tree decl = TREE_VALUE (parm);
9688 if (parm == void_list_node)
9691 if (! decl || TREE_TYPE (decl) == error_mark_node)
9694 type = TREE_TYPE (decl);
9695 if (VOID_TYPE_P (type))
9697 if (same_type_p (type, void_type_node)
9698 && DECL_SELF_REFERENCE_P (type)
9699 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9700 /* this is a parmlist of `(void)', which is ok. */
9702 cxx_incomplete_type_error (decl, type);
9703 /* It's not a good idea to actually create parameters of
9704 type `void'; other parts of the compiler assume that a
9705 void type terminates the parameter list. */
9706 type = error_mark_node;
9707 TREE_TYPE (decl) = error_mark_node;
9710 if (type != error_mark_node
9711 && TYPE_FOR_JAVA (type)
9712 && MAYBE_CLASS_TYPE_P (type))
9714 error ("parameter %qD has Java class type", decl);
9715 type = error_mark_node;
9716 TREE_TYPE (decl) = error_mark_node;
9720 if (type != error_mark_node
9721 && (errmsg = targetm.invalid_parameter_type (type)))
9724 type = error_mark_node;
9725 TREE_TYPE (decl) = error_mark_node;
9728 if (type != error_mark_node)
9730 if (deprecated_state != DEPRECATED_SUPPRESS)
9732 tree deptype = type_is_deprecated (type);
9734 warn_deprecated_use (deptype, NULL_TREE);
9737 /* Top-level qualifiers on the parameters are
9738 ignored for function types. */
9739 type = cp_build_qualified_type (type, 0);
9740 if (TREE_CODE (type) == METHOD_TYPE)
9742 error ("parameter %qD invalidly declared method type", decl);
9743 type = build_pointer_type (type);
9744 TREE_TYPE (decl) = type;
9746 else if (abstract_virtuals_error (decl, type))
9747 any_error = 1; /* Seems like a good idea. */
9748 else if (POINTER_TYPE_P (type))
9750 /* [dcl.fct]/6, parameter types cannot contain pointers
9751 (references) to arrays of unknown bound. */
9752 tree t = TREE_TYPE (type);
9753 int ptr = TYPE_PTR_P (type);
9759 else if (TREE_CODE (t) != ARRAY_TYPE)
9761 else if (!TYPE_DOMAIN (t))
9765 if (TREE_CODE (t) == ARRAY_TYPE)
9766 error ("parameter %qD includes %s to array of unknown "
9768 decl, ptr ? "pointer" : "reference", t);
9773 else if (init && !processing_template_decl)
9774 init = check_default_argument (decl, init);
9777 if (TREE_CODE (decl) == PARM_DECL
9778 && FUNCTION_PARAMETER_PACK_P (decl)
9779 && TREE_CHAIN (parm)
9780 && TREE_CHAIN (parm) != void_list_node)
9781 error ("parameter packs must be at the end of the parameter list");
9783 TREE_CHAIN (decl) = decls;
9785 result = tree_cons (init, type, result);
9787 decls = nreverse (decls);
9788 result = nreverse (result);
9790 result = chainon (result, void_list_node);
9797 /* D is a constructor or overloaded `operator='.
9799 Let T be the class in which D is declared. Then, this function
9802 -1 if D's is an ill-formed constructor or copy assignment operator
9803 whose first parameter is of type `T'.
9804 0 if D is not a copy constructor or copy assignment
9806 1 if D is a copy constructor or copy assignment operator whose
9807 first parameter is a reference to const qualified T.
9808 2 if D is a copy constructor or copy assignment operator whose
9809 first parameter is a reference to non-const qualified T.
9811 This function can be used as a predicate. Positive values indicate
9812 a copy constructor and nonzero values indicate a copy assignment
9816 copy_fn_p (const_tree d)
9822 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9824 if (TREE_CODE (d) == TEMPLATE_DECL
9825 || (DECL_TEMPLATE_INFO (d)
9826 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9827 /* Instantiations of template member functions are never copy
9828 functions. Note that member functions of templated classes are
9829 represented as template functions internally, and we must
9830 accept those as copy functions. */
9833 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9837 arg_type = TREE_VALUE (args);
9838 if (arg_type == error_mark_node)
9841 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9843 /* Pass by value copy assignment operator. */
9846 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9847 && !TYPE_REF_IS_RVALUE (arg_type)
9848 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9850 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9856 args = TREE_CHAIN (args);
9858 if (args && args != void_list_node && !TREE_PURPOSE (args))
9859 /* There are more non-optional args. */
9865 /* D is a constructor or overloaded `operator='.
9867 Let T be the class in which D is declared. Then, this function
9868 returns true when D is a move constructor or move assignment
9869 operator, false otherwise. */
9872 move_fn_p (const_tree d)
9876 bool result = false;
9878 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9880 if (cxx_dialect == cxx98)
9881 /* There are no move constructors if we are in C++98 mode. */
9884 if (TREE_CODE (d) == TEMPLATE_DECL
9885 || (DECL_TEMPLATE_INFO (d)
9886 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9887 /* Instantiations of template member functions are never copy
9888 functions. Note that member functions of templated classes are
9889 represented as template functions internally, and we must
9890 accept those as copy functions. */
9893 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9897 arg_type = TREE_VALUE (args);
9898 if (arg_type == error_mark_node)
9901 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9902 && TYPE_REF_IS_RVALUE (arg_type)
9903 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9907 args = TREE_CHAIN (args);
9909 if (args && args != void_list_node && !TREE_PURPOSE (args))
9910 /* There are more non-optional args. */
9916 /* Remember any special properties of member function DECL. */
9919 grok_special_member_properties (tree decl)
9923 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9926 class_type = DECL_CONTEXT (decl);
9927 if (DECL_CONSTRUCTOR_P (decl))
9929 int ctor = copy_fn_p (decl);
9931 if (!DECL_ARTIFICIAL (decl))
9932 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9938 A non-template constructor for class X is a copy
9939 constructor if its first parameter is of type X&, const
9940 X&, volatile X& or const volatile X&, and either there
9941 are no other parameters or else all other parameters have
9942 default arguments. */
9943 TYPE_HAS_INIT_REF (class_type) = 1;
9944 if (!DECL_DEFAULTED_FN (decl))
9945 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9947 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9949 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9951 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9952 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9953 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9955 else if (is_list_ctor (decl))
9956 TYPE_HAS_LIST_CTOR (class_type) = 1;
9958 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9962 A non-template assignment operator for class X is a copy
9963 assignment operator if its parameter is of type X, X&, const
9964 X&, volatile X& or const volatile X&. */
9966 int assop = copy_fn_p (decl);
9970 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9971 if (!DECL_DEFAULTED_FN (decl))
9972 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9974 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9979 /* Check a constructor DECL has the correct form. Complains
9980 if the class has a constructor of the form X(X). */
9983 grok_ctor_properties (const_tree ctype, const_tree decl)
9985 int ctor_parm = copy_fn_p (decl);
9991 A declaration of a constructor for a class X is ill-formed if
9992 its first parameter is of type (optionally cv-qualified) X
9993 and either there are no other parameters or else all other
9994 parameters have default arguments.
9996 We *don't* complain about member template instantiations that
9997 have this form, though; they can occur as we try to decide
9998 what constructor to use during overload resolution. Since
9999 overload resolution will never prefer such a constructor to
10000 the non-template copy constructor (which is either explicitly
10001 or implicitly defined), there's no need to worry about their
10002 existence. Theoretically, they should never even be
10003 instantiated, but that's hard to forestall. */
10004 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10012 /* An operator with this code is unary, but can also be binary. */
10015 ambi_op_p (enum tree_code code)
10017 return (code == INDIRECT_REF
10018 || code == ADDR_EXPR
10019 || code == UNARY_PLUS_EXPR
10020 || code == NEGATE_EXPR
10021 || code == PREINCREMENT_EXPR
10022 || code == PREDECREMENT_EXPR);
10025 /* An operator with this name can only be unary. */
10028 unary_op_p (enum tree_code code)
10030 return (code == TRUTH_NOT_EXPR
10031 || code == BIT_NOT_EXPR
10032 || code == COMPONENT_REF
10033 || code == TYPE_EXPR);
10036 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10037 errors are issued for invalid declarations. */
10040 grok_op_properties (tree decl, bool complain)
10042 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10044 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10045 tree name = DECL_NAME (decl);
10046 enum tree_code operator_code;
10051 /* Count the number of arguments and check for ellipsis. */
10052 for (argtype = argtypes, arity = 0;
10053 argtype && argtype != void_list_node;
10054 argtype = TREE_CHAIN (argtype))
10056 ellipsis_p = !argtype;
10058 class_type = DECL_CONTEXT (decl);
10059 if (class_type && !CLASS_TYPE_P (class_type))
10060 class_type = NULL_TREE;
10062 if (DECL_CONV_FN_P (decl))
10063 operator_code = TYPE_EXPR;
10067 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10068 if (ansi_opname (CODE) == name) \
10070 operator_code = (CODE); \
10073 else if (ansi_assopname (CODE) == name) \
10075 operator_code = (CODE); \
10076 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10080 #include "operators.def"
10081 #undef DEF_OPERATOR
10083 gcc_unreachable ();
10086 gcc_assert (operator_code != MAX_TREE_CODES);
10087 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10090 switch (operator_code)
10093 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10097 TYPE_GETS_DELETE (class_type) |= 1;
10101 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10104 case VEC_DELETE_EXPR:
10105 TYPE_GETS_DELETE (class_type) |= 2;
10112 /* [basic.std.dynamic.allocation]/1:
10114 A program is ill-formed if an allocation function is declared
10115 in a namespace scope other than global scope or declared static
10118 The same also holds true for deallocation functions. */
10119 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10120 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10122 if (DECL_NAMESPACE_SCOPE_P (decl))
10124 if (CP_DECL_CONTEXT (decl) != global_namespace)
10126 error ("%qD may not be declared within a namespace", decl);
10129 else if (!TREE_PUBLIC (decl))
10131 error ("%qD may not be declared as static", decl);
10137 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10139 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10140 DECL_IS_OPERATOR_NEW (decl) = 1;
10142 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10143 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10146 /* An operator function must either be a non-static member function
10147 or have at least one parameter of a class, a reference to a class,
10148 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10149 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10151 if (operator_code == TYPE_EXPR
10152 || operator_code == CALL_EXPR
10153 || operator_code == COMPONENT_REF
10154 || operator_code == ARRAY_REF
10155 || operator_code == NOP_EXPR)
10157 error ("%qD must be a nonstatic member function", decl);
10164 if (DECL_STATIC_FUNCTION_P (decl))
10166 error ("%qD must be either a non-static member "
10167 "function or a non-member function", decl);
10171 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10173 tree arg = non_reference (TREE_VALUE (p));
10174 if (arg == error_mark_node)
10177 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10178 because these checks are performed even on
10179 template functions. */
10180 if (MAYBE_CLASS_TYPE_P (arg)
10181 || TREE_CODE (arg) == ENUMERAL_TYPE)
10185 if (!p || p == void_list_node)
10188 error ("%qD must have an argument of class or "
10189 "enumerated type", decl);
10195 /* There are no restrictions on the arguments to an overloaded
10197 if (operator_code == CALL_EXPR)
10200 /* Warn about conversion operators that will never be used. */
10201 if (IDENTIFIER_TYPENAME_P (name)
10202 && ! DECL_TEMPLATE_INFO (decl)
10204 /* Warn only declaring the function; there is no need to
10205 warn again about out-of-class definitions. */
10206 && class_type == current_class_type)
10208 tree t = TREE_TYPE (name);
10209 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10210 const char *what = 0;
10213 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10215 if (TREE_CODE (t) == VOID_TYPE)
10217 else if (class_type)
10219 if (t == class_type)
10220 what = "the same type";
10221 /* Don't force t to be complete here. */
10222 else if (MAYBE_CLASS_TYPE_P (t)
10223 && COMPLETE_TYPE_P (t)
10224 && DERIVED_FROM_P (t, class_type))
10225 what = "a base class";
10229 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10230 "conversion operator",
10231 ref ? "a reference to " : "", what);
10234 if (operator_code == COND_EXPR)
10237 error ("ISO C++ prohibits overloading operator ?:");
10240 else if (ellipsis_p)
10242 error ("%qD must not have variable number of arguments", decl);
10245 else if (ambi_op_p (operator_code))
10248 /* We pick the one-argument operator codes by default, so
10249 we don't have to change anything. */
10251 else if (arity == 2)
10253 /* If we thought this was a unary operator, we now know
10254 it to be a binary operator. */
10255 switch (operator_code)
10258 operator_code = MULT_EXPR;
10262 operator_code = BIT_AND_EXPR;
10265 case UNARY_PLUS_EXPR:
10266 operator_code = PLUS_EXPR;
10270 operator_code = MINUS_EXPR;
10273 case PREINCREMENT_EXPR:
10274 operator_code = POSTINCREMENT_EXPR;
10277 case PREDECREMENT_EXPR:
10278 operator_code = POSTDECREMENT_EXPR;
10282 gcc_unreachable ();
10285 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10287 if ((operator_code == POSTINCREMENT_EXPR
10288 || operator_code == POSTDECREMENT_EXPR)
10289 && ! processing_template_decl
10290 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10293 error ("postfix %qD must take %<int%> as its argument",
10296 error ("postfix %qD must take %<int%> as its second "
10304 error ("%qD must take either zero or one argument", decl);
10306 error ("%qD must take either one or two arguments", decl);
10310 /* More Effective C++ rule 6. */
10312 && (operator_code == POSTINCREMENT_EXPR
10313 || operator_code == POSTDECREMENT_EXPR
10314 || operator_code == PREINCREMENT_EXPR
10315 || operator_code == PREDECREMENT_EXPR))
10317 tree arg = TREE_VALUE (argtypes);
10318 tree ret = TREE_TYPE (TREE_TYPE (decl));
10319 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10320 arg = TREE_TYPE (arg);
10321 arg = TYPE_MAIN_VARIANT (arg);
10322 if (operator_code == PREINCREMENT_EXPR
10323 || operator_code == PREDECREMENT_EXPR)
10325 if (TREE_CODE (ret) != REFERENCE_TYPE
10326 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10328 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10329 build_reference_type (arg));
10333 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10334 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10338 else if (unary_op_p (operator_code))
10343 error ("%qD must take %<void%>", decl);
10345 error ("%qD must take exactly one argument", decl);
10349 else /* if (binary_op_p (operator_code)) */
10354 error ("%qD must take exactly one argument", decl);
10356 error ("%qD must take exactly two arguments", decl);
10360 /* More Effective C++ rule 7. */
10362 && (operator_code == TRUTH_ANDIF_EXPR
10363 || operator_code == TRUTH_ORIF_EXPR
10364 || operator_code == COMPOUND_EXPR))
10365 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10369 /* Effective C++ rule 23. */
10372 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10373 && (operator_code == PLUS_EXPR
10374 || operator_code == MINUS_EXPR
10375 || operator_code == TRUNC_DIV_EXPR
10376 || operator_code == MULT_EXPR
10377 || operator_code == TRUNC_MOD_EXPR)
10378 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10379 warning (OPT_Weffc__, "%qD should return by value", decl);
10381 /* [over.oper]/8 */
10382 for (; argtypes && argtypes != void_list_node;
10383 argtypes = TREE_CHAIN (argtypes))
10384 if (TREE_PURPOSE (argtypes))
10386 TREE_PURPOSE (argtypes) = NULL_TREE;
10387 if (operator_code == POSTINCREMENT_EXPR
10388 || operator_code == POSTDECREMENT_EXPR)
10390 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10395 error ("%qD cannot have default arguments", decl);
10403 /* Return a string giving the keyword associate with CODE. */
10405 static const char *
10406 tag_name (enum tag_types code)
10418 case typename_type:
10421 gcc_unreachable ();
10425 /* Name lookup in an elaborated-type-specifier (after the keyword
10426 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10427 elaborated-type-specifier is invalid, issue a diagnostic and return
10428 error_mark_node; otherwise, return the *_TYPE to which it referred.
10429 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10432 check_elaborated_type_specifier (enum tag_types tag_code,
10434 bool allow_template_p)
10440 struct S { struct S *p; };
10442 name lookup will find the TYPE_DECL for the implicit "S::S"
10443 typedef. Adjust for that here. */
10444 if (DECL_SELF_REFERENCE_P (decl))
10445 decl = TYPE_NAME (TREE_TYPE (decl));
10447 type = TREE_TYPE (decl);
10449 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10450 is false for this case as well. */
10451 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10453 error ("using template type parameter %qT after %qs",
10454 type, tag_name (tag_code));
10455 return error_mark_node;
10459 If the identifier resolves to a typedef-name or a template
10460 type-parameter, the elaborated-type-specifier is ill-formed.
10462 In other words, the only legitimate declaration to use in the
10463 elaborated type specifier is the implicit typedef created when
10464 the type is declared. */
10465 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10466 && tag_code != typename_type)
10468 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10469 error ("%q+D has a previous declaration here", decl);
10470 return error_mark_node;
10472 else if (TREE_CODE (type) != RECORD_TYPE
10473 && TREE_CODE (type) != UNION_TYPE
10474 && tag_code != enum_type
10475 && tag_code != typename_type)
10477 error ("%qT referred to as %qs", type, tag_name (tag_code));
10478 error ("%q+T has a previous declaration here", type);
10479 return error_mark_node;
10481 else if (TREE_CODE (type) != ENUMERAL_TYPE
10482 && tag_code == enum_type)
10484 error ("%qT referred to as enum", type);
10485 error ("%q+T has a previous declaration here", type);
10486 return error_mark_node;
10488 else if (!allow_template_p
10489 && TREE_CODE (type) == RECORD_TYPE
10490 && CLASSTYPE_IS_TEMPLATE (type))
10492 /* If a class template appears as elaborated type specifier
10493 without a template header such as:
10495 template <class T> class C {};
10496 void f(class C); // No template header here
10498 then the required template argument is missing. */
10499 error ("template argument required for %<%s %T%>",
10500 tag_name (tag_code),
10501 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10502 return error_mark_node;
10508 /* Lookup NAME in elaborate type specifier in scope according to
10509 SCOPE and issue diagnostics if necessary.
10510 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10511 found, and ERROR_MARK_NODE for type error. */
10514 lookup_and_check_tag (enum tag_types tag_code, tree name,
10515 tag_scope scope, bool template_header_p)
10519 if (scope == ts_global)
10521 /* First try ordinary name lookup, ignoring hidden class name
10522 injected via friend declaration. */
10523 decl = lookup_name_prefer_type (name, 2);
10524 /* If that fails, the name will be placed in the smallest
10525 non-class, non-function-prototype scope according to 3.3.1/5.
10526 We may already have a hidden name declared as friend in this
10527 scope. So lookup again but not ignoring hidden names.
10528 If we find one, that name will be made visible rather than
10529 creating a new tag. */
10531 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10534 decl = lookup_type_scope (name, scope);
10536 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10537 decl = DECL_TEMPLATE_RESULT (decl);
10539 if (decl && TREE_CODE (decl) == TYPE_DECL)
10541 /* Look for invalid nested type:
10545 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10547 error ("%qD has the same name as the class in which it is "
10550 return error_mark_node;
10553 /* Two cases we need to consider when deciding if a class
10554 template is allowed as an elaborated type specifier:
10555 1. It is a self reference to its own class.
10556 2. It comes with a template header.
10560 template <class T> class C {
10561 class C *c1; // DECL_SELF_REFERENCE_P is true
10564 template <class U> class C; // template_header_p is true
10565 template <class T> class C<T>::D {
10566 class C *c2; // DECL_SELF_REFERENCE_P is true
10569 t = check_elaborated_type_specifier (tag_code,
10572 | DECL_SELF_REFERENCE_P (decl));
10575 else if (decl && TREE_CODE (decl) == TREE_LIST)
10577 error ("reference to %qD is ambiguous", name);
10578 print_candidates (decl);
10579 return error_mark_node;
10585 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10586 Define the tag as a forward-reference if it is not defined.
10588 If a declaration is given, process it here, and report an error if
10589 multiple declarations are not identical.
10591 SCOPE is TS_CURRENT when this is also a definition. Only look in
10592 the current frame for the name (since C++ allows new names in any
10593 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10594 declaration. Only look beginning from the current scope outward up
10595 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10597 TEMPLATE_HEADER_P is true when this declaration is preceded by
10598 a set of template parameters. */
10601 xref_tag (enum tag_types tag_code, tree name,
10602 tag_scope scope, bool template_header_p)
10604 enum tree_code code;
10606 tree context = NULL_TREE;
10608 timevar_push (TV_NAME_LOOKUP);
10610 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10616 code = RECORD_TYPE;
10622 code = ENUMERAL_TYPE;
10625 gcc_unreachable ();
10628 /* In case of anonymous name, xref_tag is only called to
10629 make type node and push name. Name lookup is not required. */
10630 if (ANON_AGGRNAME_P (name))
10633 t = lookup_and_check_tag (tag_code, name,
10634 scope, template_header_p);
10636 if (t == error_mark_node)
10637 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10639 if (scope != ts_current && t && current_class_type
10640 && template_class_depth (current_class_type)
10641 && template_header_p)
10643 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10644 definition of this tag. Since, in addition, we are currently
10645 processing a (member) template declaration of a template
10646 class, we must be very careful; consider:
10653 { template <class V>
10654 friend struct S1; };
10656 Here, the S2::S1 declaration should not be confused with the
10657 outer declaration. In particular, the inner version should
10658 have a template parameter of level 2, not level 1. This
10659 would be particularly important if the member declaration
10662 template <class V = U> friend struct S1;
10664 say, when we should tsubst into `U' when instantiating
10665 S2. On the other hand, when presented with:
10675 we must find the inner binding eventually. We
10676 accomplish this by making sure that the new type we
10677 create to represent this declaration has the right
10679 context = TYPE_CONTEXT (t);
10685 /* If no such tag is yet defined, create a forward-reference node
10686 and record it as the "definition".
10687 When a real declaration of this type is found,
10688 the forward-reference will be altered into a real type. */
10689 if (code == ENUMERAL_TYPE)
10691 error ("use of enum %q#D without previous declaration", name);
10692 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10696 t = make_class_type (code);
10697 TYPE_CONTEXT (t) = context;
10698 t = pushtag (name, t, scope);
10703 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10705 if (!redeclare_class_template (t, current_template_parms))
10706 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10708 else if (!processing_template_decl
10709 && CLASS_TYPE_P (t)
10710 && CLASSTYPE_IS_TEMPLATE (t))
10712 error ("redeclaration of %qT as a non-template", t);
10713 error ("previous declaration %q+D", t);
10714 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10717 /* Make injected friend class visible. */
10718 if (scope != ts_within_enclosing_non_class
10719 && hidden_name_p (TYPE_NAME (t)))
10721 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10722 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10724 if (TYPE_TEMPLATE_INFO (t))
10726 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10727 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10732 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10736 xref_tag_from_type (tree old, tree id, tag_scope scope)
10738 enum tag_types tag_kind;
10740 if (TREE_CODE (old) == RECORD_TYPE)
10741 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10743 tag_kind = union_type;
10745 if (id == NULL_TREE)
10746 id = TYPE_IDENTIFIER (old);
10748 return xref_tag (tag_kind, id, scope, false);
10751 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10752 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10753 access_* node, and the TREE_VALUE is the type of the base-class.
10754 Non-NULL TREE_TYPE indicates virtual inheritance.
10756 Returns true if the binfo hierarchy was successfully created,
10757 false if an error was detected. */
10760 xref_basetypes (tree ref, tree base_list)
10763 tree binfo, base_binfo;
10764 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10765 unsigned max_bases = 0; /* Maximum direct bases. */
10767 tree default_access;
10768 tree igo_prev; /* Track Inheritance Graph Order. */
10770 if (ref == error_mark_node)
10773 /* The base of a derived class is private by default, all others are
10775 default_access = (TREE_CODE (ref) == RECORD_TYPE
10776 && CLASSTYPE_DECLARED_CLASS (ref)
10777 ? access_private_node : access_public_node);
10779 /* First, make sure that any templates in base-classes are
10780 instantiated. This ensures that if we call ourselves recursively
10781 we do not get confused about which classes are marked and which
10783 basep = &base_list;
10786 tree basetype = TREE_VALUE (*basep);
10788 if (!(processing_template_decl && uses_template_parms (basetype))
10789 && !complete_type_or_else (basetype, NULL))
10790 /* An incomplete type. Remove it from the list. */
10791 *basep = TREE_CHAIN (*basep);
10795 if (TREE_TYPE (*basep))
10797 if (CLASS_TYPE_P (basetype))
10798 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10799 basep = &TREE_CHAIN (*basep);
10803 TYPE_MARKED_P (ref) = 1;
10805 /* The binfo slot should be empty, unless this is an (ill-formed)
10807 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10808 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10810 binfo = make_tree_binfo (max_bases);
10812 TYPE_BINFO (ref) = binfo;
10813 BINFO_OFFSET (binfo) = size_zero_node;
10814 BINFO_TYPE (binfo) = ref;
10816 /* Apply base-class info set up to the variants of this type. */
10817 fixup_type_variants (ref);
10821 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10822 /* An aggregate cannot have baseclasses. */
10823 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10825 if (TREE_CODE (ref) == UNION_TYPE)
10827 error ("derived union %qT invalid", ref);
10834 if (TYPE_FOR_JAVA (ref))
10836 error ("Java class %qT cannot have multiple bases", ref);
10843 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10845 if (TYPE_FOR_JAVA (ref))
10847 error ("Java class %qT cannot have virtual bases", ref);
10852 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10854 tree access = TREE_PURPOSE (base_list);
10855 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10856 tree basetype = TREE_VALUE (base_list);
10858 if (access == access_default_node)
10859 access = default_access;
10861 if (PACK_EXPANSION_P (basetype))
10862 basetype = PACK_EXPANSION_PATTERN (basetype);
10863 if (TREE_CODE (basetype) == TYPE_DECL)
10864 basetype = TREE_TYPE (basetype);
10865 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10867 error ("base type %qT fails to be a struct or class type",
10872 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10873 TYPE_FOR_JAVA (ref) = 1;
10875 base_binfo = NULL_TREE;
10876 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10878 base_binfo = TYPE_BINFO (basetype);
10879 /* The original basetype could have been a typedef'd type. */
10880 basetype = BINFO_TYPE (base_binfo);
10882 /* Inherit flags from the base. */
10883 TYPE_HAS_NEW_OPERATOR (ref)
10884 |= TYPE_HAS_NEW_OPERATOR (basetype);
10885 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10886 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10887 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10888 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10889 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10890 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10891 CLASSTYPE_REPEATED_BASE_P (ref)
10892 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10895 /* We must do this test after we've seen through a typedef
10897 if (TYPE_MARKED_P (basetype))
10899 if (basetype == ref)
10900 error ("recursive type %qT undefined", basetype);
10902 error ("duplicate base type %qT invalid", basetype);
10906 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10907 /* Regenerate the pack expansion for the bases. */
10908 basetype = make_pack_expansion (basetype);
10910 TYPE_MARKED_P (basetype) = 1;
10912 base_binfo = copy_binfo (base_binfo, basetype, ref,
10913 &igo_prev, via_virtual);
10914 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10915 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10917 BINFO_BASE_APPEND (binfo, base_binfo);
10918 BINFO_BASE_ACCESS_APPEND (binfo, access);
10921 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10922 /* If we have space in the vbase vector, we must have shared at
10923 least one of them, and are therefore diamond shaped. */
10924 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10926 /* Unmark all the types. */
10927 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10928 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10929 TYPE_MARKED_P (ref) = 0;
10931 /* Now see if we have a repeated base type. */
10932 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10934 for (base_binfo = binfo; base_binfo;
10935 base_binfo = TREE_CHAIN (base_binfo))
10937 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10939 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10942 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10944 for (base_binfo = binfo; base_binfo;
10945 base_binfo = TREE_CHAIN (base_binfo))
10946 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10947 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10956 /* Begin compiling the definition of an enumeration type.
10959 UNDERLYING_TYPE is the type that will be used as the storage for
10960 the enumeration type. This should be NULL_TREE if no storage type
10963 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10965 Returns the type object, as yet incomplete.
10966 Also records info about it so that build_enumerator
10967 may be used to declare the individual values as they are read. */
10970 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10974 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10976 /* If this is the real definition for a previous forward reference,
10977 fill in the contents in the same object that used to be the
10978 forward reference. */
10980 enumtype = lookup_and_check_tag (enum_type, name,
10981 /*tag_scope=*/ts_current,
10982 /*template_header_p=*/false);
10984 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10986 error ("multiple definition of %q#T", enumtype);
10987 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10988 /* Clear out TYPE_VALUES, and start again. */
10989 TYPE_VALUES (enumtype) = NULL_TREE;
10993 /* In case of error, make a dummy enum to allow parsing to
10995 if (enumtype == error_mark_node)
10996 name = make_anon_name ();
10998 enumtype = make_node (ENUMERAL_TYPE);
10999 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11002 if (enumtype == error_mark_node)
11007 SET_SCOPED_ENUM_P (enumtype, 1);
11008 begin_scope (sk_scoped_enum, enumtype);
11010 /* [C++0x dcl.enum]p5:
11012 If not explicitly specified, the underlying type of a scoped
11013 enumeration type is int. */
11014 if (!underlying_type)
11015 underlying_type = integer_type_node;
11018 if (underlying_type)
11020 if (CP_INTEGRAL_TYPE_P (underlying_type))
11022 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11023 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11024 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11025 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11026 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11027 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11028 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11029 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11030 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11031 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11034 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11035 underlying_type, enumtype);
11041 /* After processing and defining all the values of an enumeration type,
11042 install their decls in the enumeration type and finish it off.
11043 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11046 finish_enum (tree enumtype)
11055 bool use_short_enum;
11060 tree underlying_type = NULL_TREE;
11061 bool fixed_underlying_type_p
11062 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11064 /* We built up the VALUES in reverse order. */
11065 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11067 /* For an enum defined in a template, just set the type of the values;
11068 all further processing is postponed until the template is
11069 instantiated. We need to set the type so that tsubst of a CONST_DECL
11071 if (processing_template_decl)
11073 for (values = TYPE_VALUES (enumtype);
11075 values = TREE_CHAIN (values))
11076 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11077 if (at_function_scope_p ())
11078 add_stmt (build_min (TAG_DEFN, enumtype));
11082 /* Determine the minimum and maximum values of the enumerators. */
11083 if (TYPE_VALUES (enumtype))
11085 minnode = maxnode = NULL_TREE;
11087 for (values = TYPE_VALUES (enumtype);
11089 values = TREE_CHAIN (values))
11091 decl = TREE_VALUE (values);
11093 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11094 each enumerator has the type of its enumeration. Prior to the
11095 closing brace, the type of each enumerator is the type of its
11096 initializing value. */
11097 TREE_TYPE (decl) = enumtype;
11099 /* Update the minimum and maximum values, if appropriate. */
11100 value = DECL_INITIAL (decl);
11101 if (value == error_mark_node)
11102 value = integer_zero_node;
11103 /* Figure out what the minimum and maximum values of the
11104 enumerators are. */
11106 minnode = maxnode = value;
11107 else if (tree_int_cst_lt (maxnode, value))
11109 else if (tree_int_cst_lt (value, minnode))
11116 If the enumerator-list is empty, the underlying type is as if
11117 the enumeration had a single enumerator with value 0. */
11118 minnode = maxnode = integer_zero_node;
11120 /* Compute the number of bits require to represent all values of the
11121 enumeration. We must do this before the type of MINNODE and
11122 MAXNODE are transformed, since tree_int_cst_min_precision relies
11123 on the TREE_TYPE of the value it is passed. */
11124 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11125 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11126 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11127 precision = MAX (lowprec, highprec);
11129 if (!fixed_underlying_type_p)
11131 /* Determine the underlying type of the enumeration.
11135 The underlying type of an enumeration is an integral type that
11136 can represent all the enumerator values defined in the
11137 enumeration. It is implementation-defined which integral type is
11138 used as the underlying type for an enumeration except that the
11139 underlying type shall not be larger than int unless the value of
11140 an enumerator cannot fit in an int or unsigned int.
11142 We use "int" or an "unsigned int" as the underlying type, even if
11143 a smaller integral type would work, unless the user has
11144 explicitly requested that we use the smallest possible type. The
11145 user can request that for all enumerations with a command line
11146 flag, or for just one enumeration with an attribute. */
11148 use_short_enum = flag_short_enums
11149 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11151 for (itk = (use_short_enum ? itk_char : itk_int);
11155 underlying_type = integer_types[itk];
11156 if (TYPE_PRECISION (underlying_type) >= precision
11157 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11160 if (itk == itk_none)
11164 IF no integral type can represent all the enumerator values, the
11165 enumeration is ill-formed. */
11166 error ("no integral type can represent all of the enumerator values "
11167 "for %qT", enumtype);
11168 precision = TYPE_PRECISION (long_long_integer_type_node);
11169 underlying_type = integer_types[itk_unsigned_long_long];
11174 The value of sizeof() applied to an enumeration type, an object
11175 of an enumeration type, or an enumerator, is the value of sizeof()
11176 applied to the underlying type. */
11177 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11178 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11179 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11180 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11181 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11182 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11184 /* Set the underlying type of the enumeration type to the
11185 computed enumeration type, restricted to the enumerator
11187 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11188 set_min_and_max_values_for_integral_type
11189 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11192 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11194 /* Compute the minimum and maximum values for the type.
11198 For an enumeration where emin is the smallest enumerator and emax
11199 is the largest, the values of the enumeration are the values of the
11200 underlying type in the range bmin to bmax, where bmin and bmax are,
11201 respectively, the smallest and largest values of the smallest bit-
11202 field that can store emin and emax. */
11204 /* The middle-end currently assumes that types with TYPE_PRECISION
11205 narrower than their underlying type are suitably zero or sign
11206 extended to fill their mode. g++ doesn't make these guarantees.
11207 Until the middle-end can represent such paradoxical types, we
11208 set the TYPE_PRECISION to the width of the underlying type. */
11209 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11211 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11213 /* Convert each of the enumerators to the type of the underlying
11214 type of the enumeration. */
11215 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11217 location_t saved_location;
11219 decl = TREE_VALUE (values);
11220 saved_location = input_location;
11221 input_location = DECL_SOURCE_LOCATION (decl);
11222 if (fixed_underlying_type_p)
11223 /* If the enumeration type has a fixed underlying type, we
11224 already checked all of the enumerator values. */
11225 value = DECL_INITIAL (decl);
11227 value = perform_implicit_conversion (underlying_type,
11228 DECL_INITIAL (decl),
11229 tf_warning_or_error);
11230 input_location = saved_location;
11232 /* Do not clobber shared ints. */
11233 value = copy_node (value);
11235 TREE_TYPE (value) = enumtype;
11236 DECL_INITIAL (decl) = value;
11239 /* Fix up all variant types of this enum type. */
11240 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11242 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11243 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11244 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11245 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11246 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11247 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11248 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11249 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11250 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11251 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11252 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11255 /* Finish up the scope of a scoped enumeration. */
11256 if (SCOPED_ENUM_P (enumtype))
11259 /* Finish debugging output for this type. */
11260 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11263 /* Build and install a CONST_DECL for an enumeration constant of the
11264 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11265 Assignment of sequential values by default is handled here. */
11268 build_enumerator (tree name, tree value, tree enumtype)
11274 /* If the VALUE was erroneous, pretend it wasn't there; that will
11275 result in the enum being assigned the next value in sequence. */
11276 if (value == error_mark_node)
11279 /* Remove no-op casts from the value. */
11281 STRIP_TYPE_NOPS (value);
11283 if (! processing_template_decl)
11285 /* Validate and default VALUE. */
11286 if (value != NULL_TREE)
11288 value = integral_constant_value (value);
11290 if (TREE_CODE (value) == INTEGER_CST)
11292 value = perform_integral_promotions (value);
11293 constant_expression_warning (value);
11297 error ("enumerator value for %qD is not an integer constant", name);
11302 /* Default based on previous value. */
11303 if (value == NULL_TREE)
11305 if (TYPE_VALUES (enumtype))
11308 unsigned HOST_WIDE_INT lo;
11312 /* The next value is the previous value plus one.
11313 add_double doesn't know the type of the target expression,
11314 so we must check with int_fits_type_p as well. */
11315 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11316 if (error_operand_p (prev_value))
11317 value = error_mark_node;
11320 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11321 TREE_INT_CST_HIGH (prev_value),
11323 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11325 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11329 error ("overflow in enumeration values at %qD", name);
11330 value = error_mark_node;
11335 value = integer_zero_node;
11338 /* Remove no-op casts from the value. */
11339 STRIP_TYPE_NOPS (value);
11341 /* If the underlying type of the enum is fixed, check whether
11342 the enumerator values fits in the underlying type. If it
11343 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11344 if (ENUM_UNDERLYING_TYPE (enumtype)
11346 && TREE_CODE (value) == INTEGER_CST
11347 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11349 error ("enumerator value %E is too large for underlying type %<%T%>",
11350 value, ENUM_UNDERLYING_TYPE (enumtype));
11352 /* Silently convert the value so that we can continue. */
11353 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11358 /* C++ associates enums with global, function, or class declarations. */
11359 context = current_scope ();
11361 /* Build the actual enumeration constant. Note that the enumeration
11362 constants have the underlying type of the enum (if it is fixed)
11363 or the type of their initializer (if the underlying type of the
11364 enum is not fixed):
11368 If the underlying type is fixed, the type of each enumerator
11369 prior to the closing brace is the underlying type; if the
11370 initializing value of an enumerator cannot be represented by
11371 the underlying type, the program is ill-formed. If the
11372 underlying type is not fixed, the type of each enumerator is
11373 the type of its initializing value.
11375 If the underlying type is not fixed, it will be computed by
11376 finish_enum and we will reset the type of this enumerator. Of
11377 course, if we're processing a template, there may be no value. */
11378 type = value ? TREE_TYPE (value) : NULL_TREE;
11380 if (context && context == current_class_type)
11381 /* This enum declaration is local to the class. We need the full
11382 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11383 decl = build_lang_decl (CONST_DECL, name, type);
11385 /* It's a global enum, or it's local to a function. (Note local to
11386 a function could mean local to a class method. */
11387 decl = build_decl (input_location, CONST_DECL, name, type);
11389 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11390 TREE_CONSTANT (decl) = 1;
11391 TREE_READONLY (decl) = 1;
11392 DECL_INITIAL (decl) = value;
11394 if (context && context == current_class_type)
11395 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11396 on the TYPE_FIELDS list for `S'. (That's so that you can say
11397 things like `S::i' later.) */
11398 finish_member_declaration (decl);
11402 /* Add this enumeration constant to the list for this type. */
11403 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11406 /* Look for an enumerator with the given NAME within the enumeration
11407 type ENUMTYPE. This routine is used primarily for qualified name
11408 lookup into an enumerator in C++0x, e.g.,
11410 enum class Color { Red, Green, Blue };
11412 Color color = Color::Red;
11414 Returns the value corresponding to the enumerator, or
11415 NULL_TREE if no such enumerator was found. */
11417 lookup_enumerator (tree enumtype, tree name)
11420 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11422 e = purpose_member (name, TYPE_VALUES (enumtype));
11423 return e? TREE_VALUE (e) : NULL_TREE;
11427 /* We're defining DECL. Make sure that it's type is OK. */
11430 check_function_type (tree decl, tree current_function_parms)
11432 tree fntype = TREE_TYPE (decl);
11433 tree return_type = complete_type (TREE_TYPE (fntype));
11435 /* In a function definition, arg types must be complete. */
11436 require_complete_types_for_parms (current_function_parms);
11438 if (dependent_type_p (return_type))
11440 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11441 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11443 tree args = TYPE_ARG_TYPES (fntype);
11445 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11446 error ("return type %q#T is incomplete", return_type);
11448 error ("return type has Java class type %q#T", return_type);
11450 /* Make it return void instead. */
11451 if (TREE_CODE (fntype) == METHOD_TYPE)
11452 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11454 TREE_CHAIN (args));
11456 fntype = build_function_type (void_type_node, args);
11458 = build_exception_variant (fntype,
11459 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11462 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11465 /* Create the FUNCTION_DECL for a function definition.
11466 DECLSPECS and DECLARATOR are the parts of the declaration;
11467 they describe the function's name and the type it returns,
11468 but twisted together in a fashion that parallels the syntax of C.
11470 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11471 DECLARATOR is really the DECL for the function we are about to
11472 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11473 indicating that the function is an inline defined in-class.
11475 This function creates a binding context for the function body
11476 as well as setting up the FUNCTION_DECL in current_function_decl.
11478 For C++, we must first check whether that datum makes any sense.
11479 For example, "class A local_a(1,2);" means that variable local_a
11480 is an aggregate of type A, which should have a constructor
11481 applied to it with the argument list [1, 2].
11483 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11484 or may be a BLOCK if the function has been defined previously
11485 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11486 error_mark_node if the function has never been defined, or
11487 a BLOCK if the function has been defined somewhere. */
11490 start_preparsed_function (tree decl1, tree attrs, int flags)
11492 tree ctype = NULL_TREE;
11495 int doing_friend = 0;
11496 struct cp_binding_level *bl;
11497 tree current_function_parms;
11498 struct c_fileinfo *finfo
11499 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11500 bool honor_interface;
11502 /* Sanity check. */
11503 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11504 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11506 fntype = TREE_TYPE (decl1);
11507 if (TREE_CODE (fntype) == METHOD_TYPE)
11508 ctype = TYPE_METHOD_BASETYPE (fntype);
11510 /* ISO C++ 11.4/5. A friend function defined in a class is in
11511 the (lexical) scope of the class in which it is defined. */
11512 if (!ctype && DECL_FRIEND_P (decl1))
11514 ctype = DECL_FRIEND_CONTEXT (decl1);
11516 /* CTYPE could be null here if we're dealing with a template;
11517 for example, `inline friend float foo()' inside a template
11518 will have no CTYPE set. */
11519 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11525 if (DECL_DECLARED_INLINE_P (decl1)
11526 && lookup_attribute ("noinline", attrs))
11527 warning (0, "inline function %q+D given attribute noinline", decl1);
11529 /* Handle gnu_inline attribute. */
11530 if (GNU_INLINE_P (decl1))
11532 DECL_EXTERNAL (decl1) = 1;
11533 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11534 DECL_INTERFACE_KNOWN (decl1) = 1;
11535 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11538 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11539 /* This is a constructor, we must ensure that any default args
11540 introduced by this definition are propagated to the clones
11541 now. The clones are used directly in overload resolution. */
11542 adjust_clone_args (decl1);
11544 /* Sometimes we don't notice that a function is a static member, and
11545 build a METHOD_TYPE for it. Fix that up now. */
11546 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11547 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11549 revert_static_member_fn (decl1);
11553 /* Set up current_class_type, and enter the scope of the class, if
11556 push_nested_class (ctype);
11557 else if (DECL_STATIC_FUNCTION_P (decl1))
11558 push_nested_class (DECL_CONTEXT (decl1));
11560 /* Now that we have entered the scope of the class, we must restore
11561 the bindings for any template parameters surrounding DECL1, if it
11562 is an inline member template. (Order is important; consider the
11563 case where a template parameter has the same name as a field of
11564 the class.) It is not until after this point that
11565 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11566 if (flags & SF_INCLASS_INLINE)
11567 maybe_begin_member_template_processing (decl1);
11569 /* Effective C++ rule 15. */
11571 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11572 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11573 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11575 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11576 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11577 if (!DECL_INITIAL (decl1))
11578 DECL_INITIAL (decl1) = error_mark_node;
11580 /* This function exists in static storage.
11581 (This does not mean `static' in the C sense!) */
11582 TREE_STATIC (decl1) = 1;
11584 /* We must call push_template_decl after current_class_type is set
11585 up. (If we are processing inline definitions after exiting a
11586 class scope, current_class_type will be NULL_TREE until set above
11587 by push_nested_class.) */
11588 if (processing_template_decl)
11590 /* FIXME: Handle error_mark_node more gracefully. */
11591 tree newdecl1 = push_template_decl (decl1);
11592 if (newdecl1 != error_mark_node)
11596 /* We are now in the scope of the function being defined. */
11597 current_function_decl = decl1;
11599 /* Save the parm names or decls from this function's declarator
11600 where store_parm_decls will find them. */
11601 current_function_parms = DECL_ARGUMENTS (decl1);
11603 /* Make sure the parameter and return types are reasonable. When
11604 you declare a function, these types can be incomplete, but they
11605 must be complete when you define the function. */
11606 check_function_type (decl1, current_function_parms);
11608 /* Build the return declaration for the function. */
11609 restype = TREE_TYPE (fntype);
11610 if (DECL_RESULT (decl1) == NULL_TREE)
11614 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11615 DECL_ARTIFICIAL (resdecl) = 1;
11616 DECL_IGNORED_P (resdecl) = 1;
11617 DECL_RESULT (decl1) = resdecl;
11619 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11622 /* Let the user know we're compiling this function. */
11623 announce_function (decl1);
11625 /* Record the decl so that the function name is defined.
11626 If we already have a decl for this name, and it is a FUNCTION_DECL,
11627 use the old decl. */
11628 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11630 /* A specialization is not used to guide overload resolution. */
11631 if (!DECL_FUNCTION_MEMBER_P (decl1)
11632 && !(DECL_USE_TEMPLATE (decl1) &&
11633 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11635 tree olddecl = pushdecl (decl1);
11637 if (olddecl == error_mark_node)
11638 /* If something went wrong when registering the declaration,
11639 use DECL1; we have to have a FUNCTION_DECL to use when
11640 parsing the body of the function. */
11644 /* Otherwise, OLDDECL is either a previous declaration
11645 of the same function or DECL1 itself. */
11647 if (warn_missing_declarations
11648 && olddecl == decl1
11649 && !DECL_MAIN_P (decl1)
11650 && TREE_PUBLIC (decl1)
11651 && !DECL_DECLARED_INLINE_P (decl1))
11655 /* Check whether DECL1 is in an anonymous
11657 for (context = DECL_CONTEXT (decl1);
11659 context = DECL_CONTEXT (context))
11661 if (TREE_CODE (context) == NAMESPACE_DECL
11662 && DECL_NAME (context) == NULL_TREE)
11666 if (context == NULL)
11667 warning (OPT_Wmissing_declarations,
11668 "no previous declaration for %q+D", decl1);
11676 /* We need to set the DECL_CONTEXT. */
11677 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11678 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11680 fntype = TREE_TYPE (decl1);
11682 /* If #pragma weak applies, mark the decl appropriately now.
11683 The pragma only applies to global functions. Because
11684 determining whether or not the #pragma applies involves
11685 computing the mangled name for the declaration, we cannot
11686 apply the pragma until after we have merged this declaration
11687 with any previous declarations; if the original declaration
11688 has a linkage specification, that specification applies to
11689 the definition as well, and may affect the mangled name. */
11690 if (!DECL_CONTEXT (decl1))
11691 maybe_apply_pragma_weak (decl1);
11694 /* Reset this in case the call to pushdecl changed it. */
11695 current_function_decl = decl1;
11697 gcc_assert (DECL_INITIAL (decl1));
11699 /* This function may already have been parsed, in which case just
11700 return; our caller will skip over the body without parsing. */
11701 if (DECL_INITIAL (decl1) != error_mark_node)
11704 /* Initialize RTL machinery. We cannot do this until
11705 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11706 even when processing a template; this is how we get
11707 CFUN set up, and our per-function variables initialized.
11708 FIXME factor out the non-RTL stuff. */
11709 bl = current_binding_level;
11710 allocate_struct_function (decl1, processing_template_decl);
11712 /* Initialize the language data structures. Whenever we start
11713 a new function, we destroy temporaries in the usual way. */
11714 cfun->language = GGC_CNEW (struct language_function);
11715 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11716 current_binding_level = bl;
11718 /* Even though we're inside a function body, we still don't want to
11719 call expand_expr to calculate the size of a variable-sized array.
11720 We haven't necessarily assigned RTL to all variables yet, so it's
11721 not safe to try to expand expressions involving them. */
11722 cfun->dont_save_pending_sizes_p = 1;
11724 /* Start the statement-tree, start the tree now. */
11725 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11727 /* If we are (erroneously) defining a function that we have already
11728 defined before, wipe out what we knew before. */
11729 if (!DECL_PENDING_INLINE_P (decl1))
11730 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11732 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11734 /* We know that this was set up by `grokclassfn'. We do not
11735 wait until `store_parm_decls', since evil parse errors may
11736 never get us to that point. Here we keep the consistency
11737 between `current_class_type' and `current_class_ptr'. */
11738 tree t = DECL_ARGUMENTS (decl1);
11740 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11741 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11743 cp_function_chain->x_current_class_ref
11744 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11745 cp_function_chain->x_current_class_ptr = t;
11747 /* Constructors and destructors need to know whether they're "in
11748 charge" of initializing virtual base classes. */
11749 t = TREE_CHAIN (t);
11750 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11752 current_in_charge_parm = t;
11753 t = TREE_CHAIN (t);
11755 if (DECL_HAS_VTT_PARM_P (decl1))
11757 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11758 current_vtt_parm = t;
11762 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11763 /* Implicitly-defined methods (like the
11764 destructor for a class in which no destructor
11765 is explicitly declared) must not be defined
11766 until their definition is needed. So, we
11767 ignore interface specifications for
11768 compiler-generated functions. */
11769 && !DECL_ARTIFICIAL (decl1));
11771 if (DECL_INTERFACE_KNOWN (decl1))
11773 tree ctx = decl_function_context (decl1);
11775 if (DECL_NOT_REALLY_EXTERN (decl1))
11776 DECL_EXTERNAL (decl1) = 0;
11778 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11779 && TREE_PUBLIC (ctx))
11780 /* This is a function in a local class in an extern inline
11782 comdat_linkage (decl1);
11784 /* If this function belongs to an interface, it is public.
11785 If it belongs to someone else's interface, it is also external.
11786 This only affects inlines and template instantiations. */
11787 else if (!finfo->interface_unknown && honor_interface)
11789 if (DECL_DECLARED_INLINE_P (decl1)
11790 || DECL_TEMPLATE_INSTANTIATION (decl1)
11791 || processing_template_decl)
11793 DECL_EXTERNAL (decl1)
11794 = (finfo->interface_only
11795 || (DECL_DECLARED_INLINE_P (decl1)
11796 && ! flag_implement_inlines
11797 && !DECL_VINDEX (decl1)));
11799 /* For WIN32 we also want to put these in linkonce sections. */
11800 maybe_make_one_only (decl1);
11803 DECL_EXTERNAL (decl1) = 0;
11804 DECL_INTERFACE_KNOWN (decl1) = 1;
11805 /* If this function is in an interface implemented in this file,
11806 make sure that the back end knows to emit this function
11808 if (!DECL_EXTERNAL (decl1))
11809 mark_needed (decl1);
11811 else if (finfo->interface_unknown && finfo->interface_only
11812 && honor_interface)
11814 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11815 interface, we will have both finfo->interface_unknown and
11816 finfo->interface_only set. In that case, we don't want to
11817 use the normal heuristics because someone will supply a
11818 #pragma implementation elsewhere, and deducing it here would
11819 produce a conflict. */
11820 comdat_linkage (decl1);
11821 DECL_EXTERNAL (decl1) = 0;
11822 DECL_INTERFACE_KNOWN (decl1) = 1;
11823 DECL_DEFER_OUTPUT (decl1) = 1;
11827 /* This is a definition, not a reference.
11828 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11829 if (!GNU_INLINE_P (decl1))
11830 DECL_EXTERNAL (decl1) = 0;
11832 if ((DECL_DECLARED_INLINE_P (decl1)
11833 || DECL_TEMPLATE_INSTANTIATION (decl1))
11834 && ! DECL_INTERFACE_KNOWN (decl1)
11835 /* Don't try to defer nested functions for now. */
11836 && ! decl_function_context (decl1))
11837 DECL_DEFER_OUTPUT (decl1) = 1;
11839 DECL_INTERFACE_KNOWN (decl1) = 1;
11842 /* Determine the ELF visibility attribute for the function. We must not
11843 do this before calling "pushdecl", as we must allow "duplicate_decls"
11844 to merge any attributes appropriately. We also need to wait until
11846 if (!DECL_CLONED_FUNCTION_P (decl1))
11847 determine_visibility (decl1);
11849 begin_scope (sk_function_parms, decl1);
11853 if (DECL_DESTRUCTOR_P (decl1)
11854 || (DECL_CONSTRUCTOR_P (decl1)
11855 && targetm.cxx.cdtor_returns_this ()))
11857 cdtor_label = build_decl (input_location,
11858 LABEL_DECL, NULL_TREE, NULL_TREE);
11859 DECL_CONTEXT (cdtor_label) = current_function_decl;
11862 start_fname_decls ();
11864 store_parm_decls (current_function_parms);
11868 /* Like start_preparsed_function, except that instead of a
11869 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11871 Returns 1 on success. If the DECLARATOR is not suitable for a function
11872 (it defines a datum instead), we return 0, which tells
11873 yyparse to report a parse error. */
11876 start_function (cp_decl_specifier_seq *declspecs,
11877 const cp_declarator *declarator,
11882 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11883 if (decl1 == error_mark_node)
11885 /* If the declarator is not suitable for a function definition,
11886 cause a syntax error. */
11887 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11889 error ("invalid function declaration");
11893 if (DECL_MAIN_P (decl1))
11894 /* main must return int. grokfndecl should have corrected it
11895 (and issued a diagnostic) if the user got it wrong. */
11896 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11897 integer_type_node));
11899 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11904 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11908 use_eh_spec_block (tree fn)
11910 return (flag_exceptions && flag_enforce_eh_specs
11911 && !processing_template_decl
11912 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11913 /* We insert the EH_SPEC_BLOCK only in the original
11914 function; then, it is copied automatically to the
11916 && !DECL_CLONED_FUNCTION_P (fn)
11917 /* Implicitly-generated constructors and destructors have
11918 exception specifications. However, those specifications
11919 are the union of the possible exceptions specified by the
11920 constructors/destructors for bases and members, so no
11921 unallowed exception will ever reach this function. By
11922 not creating the EH_SPEC_BLOCK we save a little memory,
11923 and we avoid spurious warnings about unreachable
11925 && !DECL_ARTIFICIAL (fn));
11928 /* Store the parameter declarations into the current function declaration.
11929 This is called after parsing the parameter declarations, before
11930 digesting the body of the function.
11932 Also install to binding contour return value identifier, if any. */
11935 store_parm_decls (tree current_function_parms)
11937 tree fndecl = current_function_decl;
11940 /* This is a chain of any other decls that came in among the parm
11941 declarations. If a parm is declared with enum {foo, bar} x;
11942 then CONST_DECLs for foo and bar are put here. */
11943 tree nonparms = NULL_TREE;
11945 if (current_function_parms)
11947 /* This case is when the function was defined with an ANSI prototype.
11948 The parms already have decls, so we need not do anything here
11949 except record them as in effect
11950 and complain if any redundant old-style parm decls were written. */
11952 tree specparms = current_function_parms;
11955 /* Must clear this because it might contain TYPE_DECLs declared
11957 current_binding_level->names = NULL;
11959 /* If we're doing semantic analysis, then we'll call pushdecl
11960 for each of these. We must do them in reverse order so that
11961 they end in the correct forward order. */
11962 specparms = nreverse (specparms);
11964 for (parm = specparms; parm; parm = next)
11966 next = TREE_CHAIN (parm);
11967 if (TREE_CODE (parm) == PARM_DECL)
11969 if (DECL_NAME (parm) == NULL_TREE
11970 || TREE_CODE (parm) != VOID_TYPE)
11973 error ("parameter %qD declared void", parm);
11977 /* If we find an enum constant or a type tag,
11978 put it aside for the moment. */
11979 TREE_CHAIN (parm) = NULL_TREE;
11980 nonparms = chainon (nonparms, parm);
11984 /* Get the decls in their original chain order and record in the
11985 function. This is all and only the PARM_DECLs that were
11986 pushed into scope by the loop above. */
11987 DECL_ARGUMENTS (fndecl) = getdecls ();
11990 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11992 /* Now store the final chain of decls for the arguments
11993 as the decl-chain of the current lexical scope.
11994 Put the enumerators in as well, at the front so that
11995 DECL_ARGUMENTS is not modified. */
11996 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11998 if (use_eh_spec_block (current_function_decl))
11999 current_eh_spec_block = begin_eh_spec_block ();
12003 /* We have finished doing semantic analysis on DECL, but have not yet
12004 generated RTL for its body. Save away our current state, so that
12005 when we want to generate RTL later we know what to do. */
12008 save_function_data (tree decl)
12010 struct language_function *f;
12012 /* Save the language-specific per-function data so that we can
12013 get it back when we really expand this function. */
12014 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12017 f = GGC_NEW (struct language_function);
12018 memcpy (f, cp_function_chain, sizeof (struct language_function));
12019 DECL_SAVED_FUNCTION_DATA (decl) = f;
12021 /* Clear out the bits we don't need. */
12022 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12023 f->bindings = NULL;
12024 f->x_local_names = NULL;
12028 /* Set the return value of the constructor (if present). */
12031 finish_constructor_body (void)
12036 if (targetm.cxx.cdtor_returns_this ()
12037 && (! TYPE_FOR_JAVA (current_class_type)))
12039 /* Any return from a constructor will end up here. */
12040 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12042 val = DECL_ARGUMENTS (current_function_decl);
12043 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12044 DECL_RESULT (current_function_decl), val);
12045 /* Return the address of the object. */
12046 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12047 add_stmt (exprstmt);
12051 /* Do all the processing for the beginning of a destructor; set up the
12052 vtable pointers and cleanups for bases and members. */
12055 begin_destructor_body (void)
12057 tree compound_stmt;
12059 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12060 issued an error message. We still want to try to process the
12061 body of the function, but initialize_vtbl_ptrs will crash if
12062 TYPE_BINFO is NULL. */
12063 if (COMPLETE_TYPE_P (current_class_type))
12065 compound_stmt = begin_compound_stmt (0);
12066 /* Make all virtual function table pointers in non-virtual base
12067 classes point to CURRENT_CLASS_TYPE's virtual function
12069 initialize_vtbl_ptrs (current_class_ptr);
12070 finish_compound_stmt (compound_stmt);
12072 /* And insert cleanups for our bases and members so that they
12073 will be properly destroyed if we throw. */
12074 push_base_cleanups ();
12078 /* At the end of every destructor we generate code to delete the object if
12079 necessary. Do that now. */
12082 finish_destructor_body (void)
12086 /* Any return from a destructor will end up here; that way all base
12087 and member cleanups will be run when the function returns. */
12088 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12090 /* In a virtual destructor, we must call delete. */
12091 if (DECL_VIRTUAL_P (current_function_decl))
12094 tree virtual_size = cxx_sizeof (current_class_type);
12098 At the point of definition of a virtual destructor (including
12099 an implicit definition), non-placement operator delete shall
12100 be looked up in the scope of the destructor's class and if
12101 found shall be accessible and unambiguous. */
12102 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12104 /*global_p=*/false,
12105 /*placement=*/NULL_TREE,
12106 /*alloc_fn=*/NULL_TREE);
12108 if_stmt = begin_if_stmt ();
12109 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12110 current_in_charge_parm,
12113 finish_expr_stmt (exprstmt);
12114 finish_then_clause (if_stmt);
12115 finish_if_stmt (if_stmt);
12118 if (targetm.cxx.cdtor_returns_this ())
12122 val = DECL_ARGUMENTS (current_function_decl);
12123 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12124 DECL_RESULT (current_function_decl), val);
12125 /* Return the address of the object. */
12126 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12127 add_stmt (exprstmt);
12131 /* Do the necessary processing for the beginning of a function body, which
12132 in this case includes member-initializers, but not the catch clauses of
12133 a function-try-block. Currently, this means opening a binding level
12134 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12137 begin_function_body (void)
12141 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12144 if (processing_template_decl)
12145 /* Do nothing now. */;
12147 /* Always keep the BLOCK node associated with the outermost pair of
12148 curly braces of a function. These are needed for correct
12149 operation of dwarfout.c. */
12150 keep_next_level (true);
12152 stmt = begin_compound_stmt (BCS_FN_BODY);
12154 if (processing_template_decl)
12155 /* Do nothing now. */;
12156 else if (DECL_DESTRUCTOR_P (current_function_decl))
12157 begin_destructor_body ();
12162 /* Do the processing for the end of a function body. Currently, this means
12163 closing out the cleanups for fully-constructed bases and members, and in
12164 the case of the destructor, deleting the object if desired. Again, this
12165 is only meaningful for [cd]tors, since they are the only functions where
12166 there is a significant distinction between the main body and any
12167 function catch clauses. Handling, say, main() return semantics here
12168 would be wrong, as flowing off the end of a function catch clause for
12169 main() would also need to return 0. */
12172 finish_function_body (tree compstmt)
12174 if (compstmt == NULL_TREE)
12177 /* Close the block. */
12178 finish_compound_stmt (compstmt);
12180 if (processing_template_decl)
12181 /* Do nothing now. */;
12182 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12183 finish_constructor_body ();
12184 else if (DECL_DESTRUCTOR_P (current_function_decl))
12185 finish_destructor_body ();
12188 /* Given a function, returns the BLOCK corresponding to the outermost level
12189 of curly braces, skipping the artificial block created for constructor
12193 outer_curly_brace_block (tree fndecl)
12195 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12196 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12197 /* Skip the artificial function body block. */
12198 block = BLOCK_SUBBLOCKS (block);
12202 /* Finish up a function declaration and compile that function
12203 all the way to assembler language output. The free the storage
12204 for the function definition.
12206 FLAGS is a bitwise or of the following values:
12208 We just finished processing the body of an in-class inline
12209 function definition. (This processing will have taken place
12210 after the class definition is complete.) */
12213 finish_function (int flags)
12215 tree fndecl = current_function_decl;
12216 tree fntype, ctype = NULL_TREE;
12217 int inclass_inline = (flags & 2) != 0;
12220 /* When we get some parse errors, we can end up without a
12221 current_function_decl, so cope. */
12222 if (fndecl == NULL_TREE)
12223 return error_mark_node;
12225 gcc_assert (!defer_mark_used_calls);
12226 defer_mark_used_calls = true;
12228 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12229 && DECL_VIRTUAL_P (fndecl)
12230 && !processing_template_decl)
12232 tree fnclass = DECL_CONTEXT (fndecl);
12233 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12234 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12237 nested = function_depth > 1;
12238 fntype = TREE_TYPE (fndecl);
12240 /* TREE_READONLY (fndecl) = 1;
12241 This caused &foo to be of type ptr-to-const-function
12242 which then got a warning when stored in a ptr-to-function variable. */
12244 gcc_assert (building_stmt_tree ());
12245 /* The current function is being defined, so its DECL_INITIAL should
12246 be set, and unless there's a multiple definition, it should be
12247 error_mark_node. */
12248 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12250 /* For a cloned function, we've already got all the code we need;
12251 there's no need to add any extra bits. */
12252 if (!DECL_CLONED_FUNCTION_P (fndecl))
12254 if (DECL_MAIN_P (current_function_decl))
12258 /* Make it so that `main' always returns 0 by default (or
12261 stmt = finish_return_stmt (integer_one_node);
12263 stmt = finish_return_stmt (integer_zero_node);
12265 /* Hack. We don't want the middle-end to warn that this
12266 return is unreachable, so put the statement on the
12269 location_t linezero = linemap_line_start (line_table, 0, 1);
12270 SET_EXPR_LOCATION (stmt, linezero);
12274 if (use_eh_spec_block (current_function_decl))
12275 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12276 (TREE_TYPE (current_function_decl)),
12277 current_eh_spec_block);
12280 /* If we're saving up tree structure, tie off the function now. */
12281 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12283 finish_fname_decls ();
12285 /* If this function can't throw any exceptions, remember that. */
12286 if (!processing_template_decl
12287 && !cp_function_chain->can_throw
12288 && !flag_non_call_exceptions
12289 && !DECL_REPLACEABLE_P (fndecl))
12290 TREE_NOTHROW (fndecl) = 1;
12292 /* This must come after expand_function_end because cleanups might
12293 have declarations (from inline functions) that need to go into
12294 this function's blocks. */
12296 /* If the current binding level isn't the outermost binding level
12297 for this function, either there is a bug, or we have experienced
12298 syntax errors and the statement tree is malformed. */
12299 if (current_binding_level->kind != sk_function_parms)
12301 /* Make sure we have already experienced errors. */
12302 gcc_assert (errorcount);
12304 /* Throw away the broken statement tree and extra binding
12306 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12308 while (current_binding_level->kind != sk_function_parms)
12310 if (current_binding_level->kind == sk_class)
12311 pop_nested_class ();
12313 poplevel (0, 0, 0);
12316 poplevel (1, 0, 1);
12318 /* Statements should always be full-expressions at the outermost set
12319 of curly braces for a function. */
12320 gcc_assert (stmts_are_full_exprs_p ());
12322 /* Set up the named return value optimization, if we can. Candidate
12323 variables are selected in check_return_expr. */
12324 if (current_function_return_value)
12326 tree r = current_function_return_value;
12329 if (r != error_mark_node
12330 /* This is only worth doing for fns that return in memory--and
12331 simpler, since we don't have to worry about promoted modes. */
12332 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12333 /* Only allow this for variables declared in the outer scope of
12334 the function so we know that their lifetime always ends with a
12335 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12336 we were to do this optimization in tree-ssa. */
12337 && (outer = outer_curly_brace_block (fndecl))
12338 && chain_member (r, BLOCK_VARS (outer)))
12339 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12341 current_function_return_value = NULL_TREE;
12344 /* Remember that we were in class scope. */
12345 if (current_class_name)
12346 ctype = current_class_type;
12348 /* Must mark the RESULT_DECL as being in this function. */
12349 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12351 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12352 to the FUNCTION_DECL node itself. */
12353 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12355 /* Save away current state, if appropriate. */
12356 if (!processing_template_decl)
12357 save_function_data (fndecl);
12359 /* Complain if there's just no return statement. */
12360 if (warn_return_type
12361 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12362 && !dependent_type_p (TREE_TYPE (fntype))
12363 && !current_function_returns_value && !current_function_returns_null
12364 /* Don't complain if we abort or throw. */
12365 && !current_function_returns_abnormally
12366 && !DECL_NAME (DECL_RESULT (fndecl))
12367 && !TREE_NO_WARNING (fndecl)
12368 /* Structor return values (if any) are set by the compiler. */
12369 && !DECL_CONSTRUCTOR_P (fndecl)
12370 && !DECL_DESTRUCTOR_P (fndecl))
12372 warning (OPT_Wreturn_type,
12373 "no return statement in function returning non-void");
12374 TREE_NO_WARNING (fndecl) = 1;
12377 /* Store the end of the function, so that we get good line number
12378 info for the epilogue. */
12379 cfun->function_end_locus = input_location;
12381 /* Genericize before inlining. */
12382 if (!processing_template_decl)
12384 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12385 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12386 cp_genericize (fndecl);
12387 /* Clear out the bits we don't need. */
12388 f->x_current_class_ptr = NULL;
12389 f->x_current_class_ref = NULL;
12390 f->x_eh_spec_block = NULL;
12391 f->x_in_charge_parm = NULL;
12392 f->x_vtt_parm = NULL;
12393 f->x_return_value = NULL;
12394 f->bindings = NULL;
12395 f->extern_decl_map = NULL;
12397 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12398 c_warn_unused_result (gimple_body (fndecl));
12400 /* Clear out the bits we don't need. */
12401 local_names = NULL;
12403 /* We're leaving the context of this function, so zap cfun. It's still in
12404 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12406 current_function_decl = NULL;
12408 /* If this is an in-class inline definition, we may have to pop the
12409 bindings for the template parameters that we added in
12410 maybe_begin_member_template_processing when start_function was
12412 if (inclass_inline)
12413 maybe_end_member_template_processing ();
12415 /* Leave the scope of the class. */
12417 pop_nested_class ();
12423 /* Let the error reporting routines know that we're outside a
12424 function. For a nested function, this value is used in
12425 cxx_pop_function_context and then reset via pop_function_context. */
12426 current_function_decl = NULL_TREE;
12428 defer_mark_used_calls = false;
12429 if (deferred_mark_used_calls)
12434 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12436 VEC_free (tree, gc, deferred_mark_used_calls);
12442 /* Create the FUNCTION_DECL for a function definition.
12443 DECLSPECS and DECLARATOR are the parts of the declaration;
12444 they describe the return type and the name of the function,
12445 but twisted together in a fashion that parallels the syntax of C.
12447 This function creates a binding context for the function body
12448 as well as setting up the FUNCTION_DECL in current_function_decl.
12450 Returns a FUNCTION_DECL on success.
12452 If the DECLARATOR is not suitable for a function (it defines a datum
12453 instead), we return 0, which tells yyparse to report a parse error.
12455 May return void_type_node indicating that this method is actually
12456 a friend. See grokfield for more details.
12458 Came here with a `.pushlevel' .
12460 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12461 CHANGES TO CODE IN `grokfield'. */
12464 start_method (cp_decl_specifier_seq *declspecs,
12465 const cp_declarator *declarator, tree attrlist)
12467 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12470 if (fndecl == error_mark_node)
12471 return error_mark_node;
12473 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12475 error ("invalid member function declaration");
12476 return error_mark_node;
12480 cplus_decl_attributes (&fndecl, attrlist, 0);
12482 /* Pass friends other than inline friend functions back. */
12483 if (fndecl == void_type_node)
12486 if (DECL_IN_AGGR_P (fndecl))
12488 if (DECL_CONTEXT (fndecl)
12489 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12490 error ("%qD is already defined in class %qT", fndecl,
12491 DECL_CONTEXT (fndecl));
12492 return error_mark_node;
12495 check_template_shadow (fndecl);
12497 DECL_DECLARED_INLINE_P (fndecl) = 1;
12498 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12500 /* We process method specializations in finish_struct_1. */
12501 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12503 fndecl = push_template_decl (fndecl);
12504 if (fndecl == error_mark_node)
12508 if (! DECL_FRIEND_P (fndecl))
12510 if (TREE_CHAIN (fndecl))
12512 fndecl = copy_node (fndecl);
12513 TREE_CHAIN (fndecl) = NULL_TREE;
12517 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12519 /* Make a place for the parms. */
12520 begin_scope (sk_function_parms, fndecl);
12522 DECL_IN_AGGR_P (fndecl) = 1;
12526 /* Go through the motions of finishing a function definition.
12527 We don't compile this method until after the whole class has
12530 FINISH_METHOD must return something that looks as though it
12531 came from GROKFIELD (since we are defining a method, after all).
12533 This is called after parsing the body of the function definition.
12534 STMTS is the chain of statements that makes up the function body.
12536 DECL is the ..._DECL that `start_method' provided. */
12539 finish_method (tree decl)
12541 tree fndecl = decl;
12546 if (decl == void_type_node)
12549 old_initial = DECL_INITIAL (fndecl);
12551 /* Undo the level for the parms (from start_method).
12552 This is like poplevel, but it causes nothing to be
12553 saved. Saving information here confuses symbol-table
12554 output routines. Besides, this information will
12555 be correctly output when this method is actually
12558 /* Clear out the meanings of the local variables of this level;
12559 also record in each decl which block it belongs to. */
12561 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12563 if (DECL_NAME (link) != NULL_TREE)
12564 pop_binding (DECL_NAME (link), link);
12565 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12566 DECL_CONTEXT (link) = NULL_TREE;
12569 poplevel (0, 0, 0);
12571 DECL_INITIAL (fndecl) = old_initial;
12573 /* We used to check if the context of FNDECL was different from
12574 current_class_type as another way to get inside here. This didn't work
12575 for String.cc in libg++. */
12576 if (DECL_FRIEND_P (fndecl))
12578 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12580 decl = void_type_node;
12587 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12588 we can lay it out later, when and if its type becomes complete. */
12591 maybe_register_incomplete_var (tree var)
12593 gcc_assert (TREE_CODE (var) == VAR_DECL);
12595 /* Keep track of variables with incomplete types. */
12596 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12597 && DECL_EXTERNAL (var))
12599 tree inner_type = TREE_TYPE (var);
12601 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12602 inner_type = TREE_TYPE (inner_type);
12603 inner_type = TYPE_MAIN_VARIANT (inner_type);
12605 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12606 /* RTTI TD entries are created while defining the type_info. */
12607 || (TYPE_LANG_SPECIFIC (inner_type)
12608 && TYPE_BEING_DEFINED (inner_type)))
12609 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12613 /* Called when a class type (given by TYPE) is defined. If there are
12614 any existing VAR_DECLs whose type has been completed by this
12615 declaration, update them now. */
12618 complete_vars (tree type)
12620 tree *list = &incomplete_vars;
12622 gcc_assert (CLASS_TYPE_P (type));
12625 if (same_type_p (type, TREE_PURPOSE (*list)))
12627 tree var = TREE_VALUE (*list);
12628 tree type = TREE_TYPE (var);
12629 /* Complete the type of the variable. The VAR_DECL itself
12630 will be laid out in expand_expr. */
12631 complete_type (type);
12632 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12633 /* Remove this entry from the list. */
12634 *list = TREE_CHAIN (*list);
12637 list = &TREE_CHAIN (*list);
12640 /* Check for pending declarations which may have abstract type. */
12641 complete_type_check_abstract (type);
12644 /* If DECL is of a type which needs a cleanup, build and return an
12645 expression to perform that cleanup here. Return NULL_TREE if no
12646 cleanup need be done. */
12649 cxx_maybe_build_cleanup (tree decl)
12655 /* Assume no cleanup is required. */
12656 cleanup = NULL_TREE;
12658 if (error_operand_p (decl))
12661 /* Handle "__attribute__((cleanup))". We run the cleanup function
12662 before the destructor since the destructor is what actually
12663 terminates the lifetime of the object. */
12664 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12671 /* Get the name specified by the user for the cleanup function. */
12672 id = TREE_VALUE (TREE_VALUE (attr));
12673 /* Look up the name to find the cleanup function to call. It is
12674 important to use lookup_name here because that is what is
12675 used in c-common.c:handle_cleanup_attribute when performing
12676 initial checks on the attribute. Note that those checks
12677 include ensuring that the function found is not an overloaded
12678 function, or an object with an overloaded call operator,
12679 etc.; we can rely on the fact that the function found is an
12680 ordinary FUNCTION_DECL. */
12681 fn = lookup_name (id);
12682 arg = build_address (decl);
12684 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12686 tf_warning_or_error);
12688 /* Handle ordinary C++ destructors. */
12689 type = TREE_TYPE (decl);
12690 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12692 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12693 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12694 && CLASSTYPE_VBASECLASSES (type));
12698 if (TREE_CODE (type) == ARRAY_TYPE)
12701 addr = build_address (decl);
12703 /* Optimize for space over speed here. */
12704 if (!has_vbases || flag_expensive_optimizations)
12705 flags |= LOOKUP_NONVIRTUAL;
12707 call = build_delete (TREE_TYPE (addr), addr,
12708 sfk_complete_destructor, flags, 0);
12710 cleanup = build_compound_expr (input_location, cleanup, call);
12718 /* When a stmt has been parsed, this function is called. */
12725 /* DECL was originally constructed as a non-static member function,
12726 but turned out to be static. Update it accordingly. */
12729 revert_static_member_fn (tree decl)
12732 tree function = TREE_TYPE (decl);
12733 tree args = TYPE_ARG_TYPES (function);
12735 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12736 != TYPE_UNQUALIFIED)
12737 error ("static member function %q#D declared with type qualifiers", decl);
12739 args = TREE_CHAIN (args);
12740 tmp = build_function_type (TREE_TYPE (function), args);
12741 tmp = build_qualified_type (tmp, cp_type_quals (function));
12742 tmp = build_exception_variant (tmp,
12743 TYPE_RAISES_EXCEPTIONS (function));
12744 TREE_TYPE (decl) = tmp;
12745 if (DECL_ARGUMENTS (decl))
12746 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12747 DECL_STATIC_FUNCTION_P (decl) = 1;
12750 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12751 one of the language-independent trees. */
12753 enum cp_tree_node_structure_enum
12754 cp_tree_node_structure (union lang_tree_node * t)
12756 switch (TREE_CODE (&t->generic))
12758 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12759 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12760 case OVERLOAD: return TS_CP_OVERLOAD;
12761 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12762 case PTRMEM_CST: return TS_CP_PTRMEM;
12763 case BASELINK: return TS_CP_BASELINK;
12764 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12765 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12766 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12767 default: return TS_CP_GENERIC;
12771 /* Build the void_list_node (void_type_node having been created). */
12773 build_void_list_node (void)
12775 tree t = build_tree_list (NULL_TREE, void_type_node);
12780 cp_missing_noreturn_ok_p (tree decl)
12782 /* A missing noreturn is ok for the `main' function. */
12783 return DECL_MAIN_P (decl);
12786 /* Return the COMDAT group into which DECL should be placed. */
12789 cxx_comdat_group (tree decl)
12793 /* Virtual tables, construction virtual tables, and virtual table
12794 tables all go in a single COMDAT group, named after the primary
12796 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12797 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12798 /* For all other DECLs, the COMDAT group is the mangled name of the
12799 declaration itself. */
12802 while (DECL_THUNK_P (decl))
12804 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12805 into the same section as the target function. In that case
12806 we must return target's name. */
12807 tree target = THUNK_TARGET (decl);
12808 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12809 && DECL_SECTION_NAME (target) != NULL
12810 && DECL_ONE_ONLY (target))
12815 name = DECL_ASSEMBLER_NAME (decl);
12821 #include "gt-cp-decl.h"