1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 if (TREE_CODE (f1) != TREE_CODE (f2))
938 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
940 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
941 && (DECL_BUILT_IN (olddecl)
942 #ifndef NO_IMPLICIT_EXTERN_C
943 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
944 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
948 types_match = self_promoting_args_p (p1);
949 if (p1 == void_list_node)
950 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
952 #ifndef NO_IMPLICIT_EXTERN_C
953 else if (p1 == NULL_TREE
954 && (DECL_EXTERN_C_P (olddecl)
955 && DECL_IN_SYSTEM_HEADER (olddecl)
956 && !DECL_CLASS_SCOPE_P (olddecl))
957 && (DECL_EXTERN_C_P (newdecl)
958 && DECL_IN_SYSTEM_HEADER (newdecl)
959 && !DECL_CLASS_SCOPE_P (newdecl)))
961 types_match = self_promoting_args_p (p2);
962 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
966 types_match = compparms (p1, p2);
971 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
973 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
974 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
977 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
978 DECL_TEMPLATE_PARMS (olddecl)))
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
982 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
983 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
985 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
986 DECL_TEMPLATE_RESULT (newdecl));
990 /* Need to check scope for variable declaration (VAR_DECL).
991 For typedef (TYPE_DECL), scope is ignored. */
992 if (TREE_CODE (newdecl) == VAR_DECL
993 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
995 Two declarations for an object with C language linkage
996 with the same name (ignoring the namespace that qualify
997 it) that appear in different namespace scopes refer to
999 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1002 if (TREE_TYPE (newdecl) == error_mark_node)
1003 types_match = TREE_TYPE (olddecl) == error_mark_node;
1004 else if (TREE_TYPE (olddecl) == NULL_TREE)
1005 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1006 else if (TREE_TYPE (newdecl) == NULL_TREE)
1009 types_match = comptypes (TREE_TYPE (newdecl),
1010 TREE_TYPE (olddecl),
1011 COMPARE_REDECLARATION);
1017 /* If NEWDECL is `static' and an `extern' was seen previously,
1018 warn about it. OLDDECL is the previous declaration.
1020 Note that this does not apply to the C++ case of declaring
1021 a variable `extern const' and then later `const'.
1023 Don't complain about built-in functions, since they are beyond
1024 the user's control. */
1027 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1031 if (TREE_CODE (newdecl) == TYPE_DECL
1032 || TREE_CODE (newdecl) == TEMPLATE_DECL
1033 || TREE_CODE (newdecl) == CONST_DECL
1034 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1037 /* Don't get confused by static member functions; that's a different
1039 if (TREE_CODE (newdecl) == FUNCTION_DECL
1040 && DECL_STATIC_FUNCTION_P (newdecl))
1043 /* If the old declaration was `static', or the new one isn't, then
1044 then everything is OK. */
1045 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1048 /* It's OK to declare a builtin function as `static'. */
1049 if (TREE_CODE (olddecl) == FUNCTION_DECL
1050 && DECL_ARTIFICIAL (olddecl))
1053 name = DECL_ASSEMBLER_NAME (newdecl);
1054 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1055 permerror (input_location, "previous declaration of %q+D", olddecl);
1058 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1059 function templates. If their exception specifications do not
1060 match, issue a diagnostic. */
1063 check_redeclaration_exception_specification (tree new_decl,
1068 tree new_exceptions;
1069 tree old_exceptions;
1071 new_type = TREE_TYPE (new_decl);
1072 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1073 old_type = TREE_TYPE (old_decl);
1074 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1078 If any declaration of a function has an exception-specification,
1079 all declarations, including the definition and an explicit
1080 specialization, of that function shall have an
1081 exception-specification with the same set of type-ids. */
1082 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1083 && ! DECL_IS_BUILTIN (old_decl)
1085 && !comp_except_specs (new_exceptions, old_exceptions,
1088 error ("declaration of %qF throws different exceptions", new_decl);
1089 error ("from previous declaration %q+F", old_decl);
1093 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1094 && lookup_attribute ("gnu_inline", \
1095 DECL_ATTRIBUTES (fn)))
1097 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1098 If the redeclaration is invalid, a diagnostic is issued, and the
1099 error_mark_node is returned. Otherwise, OLDDECL is returned.
1101 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1104 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1107 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1109 unsigned olddecl_uid = DECL_UID (olddecl);
1110 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1111 int new_defines_function = 0;
1112 tree new_template_info;
1114 if (newdecl == olddecl)
1117 types_match = decls_match (newdecl, olddecl);
1119 /* If either the type of the new decl or the type of the old decl is an
1120 error_mark_node, then that implies that we have already issued an
1121 error (earlier) for some bogus type specification, and in that case,
1122 it is rather pointless to harass the user with yet more error message
1123 about the same declaration, so just pretend the types match here. */
1124 if (TREE_TYPE (newdecl) == error_mark_node
1125 || TREE_TYPE (olddecl) == error_mark_node)
1126 return error_mark_node;
1128 if (DECL_P (olddecl)
1129 && TREE_CODE (newdecl) == FUNCTION_DECL
1130 && TREE_CODE (olddecl) == FUNCTION_DECL
1131 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1133 if (DECL_DECLARED_INLINE_P (newdecl)
1134 && DECL_UNINLINABLE (newdecl)
1135 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1136 /* Already warned elsewhere. */;
1137 else if (DECL_DECLARED_INLINE_P (olddecl)
1138 && DECL_UNINLINABLE (olddecl)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1140 /* Already warned. */;
1141 else if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (olddecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1145 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1147 warning (OPT_Wattributes, "previous declaration of %q+D "
1148 "with attribute noinline", olddecl);
1150 else if (DECL_DECLARED_INLINE_P (olddecl)
1151 && DECL_UNINLINABLE (newdecl)
1152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1154 warning (OPT_Wattributes, "function %q+D redeclared with "
1155 "attribute noinline", newdecl);
1156 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1161 /* Check for redeclaration and other discrepancies. */
1162 if (TREE_CODE (olddecl) == FUNCTION_DECL
1163 && DECL_ARTIFICIAL (olddecl))
1165 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1166 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1168 /* Avoid warnings redeclaring built-ins which have not been
1169 explicitly declared. */
1170 if (DECL_ANTICIPATED (olddecl))
1173 /* If you declare a built-in or predefined function name as static,
1174 the old definition is overridden, but optionally warn this was a
1175 bad choice of name. */
1176 if (! TREE_PUBLIC (newdecl))
1178 warning (OPT_Wshadow, "shadowing %s function %q#D",
1179 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1181 /* Discard the old built-in function. */
1184 /* If the built-in is not ansi, then programs can override
1185 it even globally without an error. */
1186 else if (! DECL_BUILT_IN (olddecl))
1187 warning (0, "library function %q#D redeclared as non-function %q#D",
1191 error ("declaration of %q#D", newdecl);
1192 error ("conflicts with built-in declaration %q#D",
1197 else if (!types_match)
1199 /* Avoid warnings redeclaring built-ins which have not been
1200 explicitly declared. */
1201 if (DECL_ANTICIPATED (olddecl))
1203 /* Deal with fileptr_type_node. FILE type is not known
1204 at the time we create the builtins. */
1207 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1208 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1210 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1213 else if (TREE_VALUE (t2) == fileptr_type_node)
1215 tree t = TREE_VALUE (t1);
1217 if (TREE_CODE (t) == POINTER_TYPE
1218 && TYPE_NAME (TREE_TYPE (t))
1219 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1220 == get_identifier ("FILE")
1221 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1223 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1225 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1226 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1227 types_match = decls_match (newdecl, olddecl);
1229 return duplicate_decls (newdecl, olddecl,
1231 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1234 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1237 else if ((DECL_EXTERN_C_P (newdecl)
1238 && DECL_EXTERN_C_P (olddecl))
1239 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1240 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1242 /* A near match; override the builtin. */
1244 if (TREE_PUBLIC (newdecl))
1246 warning (0, "new declaration %q#D", newdecl);
1247 warning (0, "ambiguates built-in declaration %q#D",
1251 warning (OPT_Wshadow, "shadowing %s function %q#D",
1252 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1256 /* Discard the old built-in function. */
1259 /* Replace the old RTL to avoid problems with inlining. */
1260 COPY_DECL_RTL (newdecl, olddecl);
1262 /* Even if the types match, prefer the new declarations type for
1263 built-ins which have not been explicitly declared, for
1264 exception lists, etc... */
1265 else if (DECL_ANTICIPATED (olddecl))
1267 tree type = TREE_TYPE (newdecl);
1268 tree attribs = (*targetm.merge_type_attributes)
1269 (TREE_TYPE (olddecl), type);
1271 type = cp_build_type_attribute_variant (type, attribs);
1272 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1275 /* If a function is explicitly declared "throw ()", propagate that to
1276 the corresponding builtin. */
1277 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1278 && DECL_ANTICIPATED (olddecl)
1279 && TREE_NOTHROW (newdecl)
1280 && !TREE_NOTHROW (olddecl)
1281 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1282 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1284 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1286 /* Whether or not the builtin can throw exceptions has no
1287 bearing on this declarator. */
1288 TREE_NOTHROW (olddecl) = 0;
1290 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1292 /* If a builtin function is redeclared as `static', merge
1293 the declarations, but make the original one static. */
1294 DECL_THIS_STATIC (olddecl) = 1;
1295 TREE_PUBLIC (olddecl) = 0;
1297 /* Make the old declaration consistent with the new one so
1298 that all remnants of the builtin-ness of this function
1299 will be banished. */
1300 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1301 COPY_DECL_RTL (newdecl, olddecl);
1304 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1306 /* C++ Standard, 3.3, clause 4:
1307 "[Note: a namespace name or a class template name must be unique
1308 in its declarative region (7.3.2, clause 14). ]" */
1309 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1310 && TREE_CODE (newdecl) != NAMESPACE_DECL
1311 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1312 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1313 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1314 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1316 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1317 && TREE_CODE (newdecl) != TYPE_DECL)
1318 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1319 && TREE_CODE (olddecl) != TYPE_DECL))
1321 /* We do nothing special here, because C++ does such nasty
1322 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1323 get shadowed, and know that if we need to find a TYPE_DECL
1324 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1325 slot of the identifier. */
1329 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1330 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1331 || (TREE_CODE (olddecl) == FUNCTION_DECL
1332 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1336 error ("%q#D redeclared as different kind of symbol", newdecl);
1337 if (TREE_CODE (olddecl) == TREE_LIST)
1338 olddecl = TREE_VALUE (olddecl);
1339 error ("previous declaration of %q+#D", olddecl);
1341 return error_mark_node;
1343 else if (!types_match)
1345 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1346 /* These are certainly not duplicate declarations; they're
1347 from different scopes. */
1350 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1352 /* The name of a class template may not be declared to refer to
1353 any other template, class, function, object, namespace, value,
1354 or type in the same scope. */
1355 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1356 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1358 error ("declaration of template %q#D", newdecl);
1359 error ("conflicts with previous declaration %q+#D", olddecl);
1361 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1362 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1363 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1364 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1365 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1366 DECL_TEMPLATE_PARMS (olddecl))
1367 /* Template functions can be disambiguated by
1369 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1370 TREE_TYPE (TREE_TYPE (olddecl))))
1372 error ("new declaration %q#D", newdecl);
1373 error ("ambiguates old declaration %q+#D", olddecl);
1377 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1379 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1381 error ("declaration of C function %q#D conflicts with",
1383 error ("previous declaration %q+#D here", olddecl);
1385 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1386 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1388 error ("new declaration %q#D", newdecl);
1389 error ("ambiguates old declaration %q+#D", olddecl);
1390 return error_mark_node;
1397 error ("conflicting declaration %q#D", newdecl);
1398 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1399 return error_mark_node;
1402 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1403 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1404 && (!DECL_TEMPLATE_INFO (newdecl)
1405 || (DECL_TI_TEMPLATE (newdecl)
1406 != DECL_TI_TEMPLATE (olddecl))))
1407 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1408 && (!DECL_TEMPLATE_INFO (olddecl)
1409 || (DECL_TI_TEMPLATE (olddecl)
1410 != DECL_TI_TEMPLATE (newdecl))))))
1411 /* It's OK to have a template specialization and a non-template
1412 with the same type, or to have specializations of two
1413 different templates with the same type. Note that if one is a
1414 specialization, and the other is an instantiation of the same
1415 template, that we do not exit at this point. That situation
1416 can occur if we instantiate a template class, and then
1417 specialize one of its methods. This situation is valid, but
1418 the declarations must be merged in the usual way. */
1420 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1421 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1422 && !DECL_USE_TEMPLATE (newdecl))
1423 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1424 && !DECL_USE_TEMPLATE (olddecl))))
1425 /* One of the declarations is a template instantiation, and the
1426 other is not a template at all. That's OK. */
1428 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1430 /* In [namespace.alias] we have:
1432 In a declarative region, a namespace-alias-definition can be
1433 used to redefine a namespace-alias declared in that declarative
1434 region to refer only to the namespace to which it already
1437 Therefore, if we encounter a second alias directive for the same
1438 alias, we can just ignore the second directive. */
1439 if (DECL_NAMESPACE_ALIAS (newdecl)
1440 && (DECL_NAMESPACE_ALIAS (newdecl)
1441 == DECL_NAMESPACE_ALIAS (olddecl)))
1443 /* [namespace.alias]
1445 A namespace-name or namespace-alias shall not be declared as
1446 the name of any other entity in the same declarative region.
1447 A namespace-name defined at global scope shall not be
1448 declared as the name of any other entity in any global scope
1450 error ("declaration of namespace %qD conflicts with", newdecl);
1451 error ("previous declaration of namespace %q+D here", olddecl);
1452 return error_mark_node;
1456 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1459 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1460 if (DECL_NAME (olddecl) != NULL_TREE)
1461 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1462 ? "%q+#D previously defined here"
1463 : "%q+#D previously declared here", olddecl);
1464 return error_mark_node;
1466 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1467 && DECL_INITIAL (olddecl) != NULL_TREE
1468 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1469 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1471 /* Prototype decl follows defn w/o prototype. */
1472 warning (0, "prototype for %q+#D", newdecl);
1473 warning (0, "%Jfollows non-prototype definition here", olddecl);
1475 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1476 || TREE_CODE (olddecl) == VAR_DECL)
1477 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1480 If two declarations of the same function or object
1481 specify different linkage-specifications ..., the program
1482 is ill-formed.... Except for functions with C++ linkage,
1483 a function declaration without a linkage specification
1484 shall not precede the first linkage specification for
1485 that function. A function can be declared without a
1486 linkage specification after an explicit linkage
1487 specification has been seen; the linkage explicitly
1488 specified in the earlier declaration is not affected by
1489 such a function declaration.
1491 DR 563 raises the question why the restrictions on
1492 functions should not also apply to objects. Older
1493 versions of G++ silently ignore the linkage-specification
1501 which is clearly wrong. Therefore, we now treat objects
1503 if (current_lang_depth () == 0)
1505 /* There is no explicit linkage-specification, so we use
1506 the linkage from the previous declaration. */
1507 if (!DECL_LANG_SPECIFIC (newdecl))
1508 retrofit_lang_decl (newdecl);
1509 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1513 error ("previous declaration of %q+#D with %qL linkage",
1514 olddecl, DECL_LANGUAGE (olddecl));
1515 error ("conflicts with new declaration with %qL linkage",
1516 DECL_LANGUAGE (newdecl));
1520 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1522 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1524 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1525 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1528 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1529 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1531 for (; t1 && t1 != void_list_node;
1532 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1533 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1535 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1538 permerror (input_location, "default argument given for parameter %d of %q#D",
1540 permerror (input_location, "after previous specification in %q+#D", olddecl);
1544 error ("default argument given for parameter %d of %q#D",
1546 error ("after previous specification in %q+#D",
1553 /* Do not merge an implicit typedef with an explicit one. In:
1557 typedef class A A __attribute__ ((foo));
1559 the attribute should apply only to the typedef. */
1560 if (TREE_CODE (olddecl) == TYPE_DECL
1561 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1562 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1565 /* If new decl is `static' and an `extern' was seen previously,
1567 warn_extern_redeclared_static (newdecl, olddecl);
1569 /* We have committed to returning 1 at this point. */
1570 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1572 /* Now that functions must hold information normally held
1573 by field decls, there is extra work to do so that
1574 declaration information does not get destroyed during
1576 if (DECL_VINDEX (olddecl))
1577 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1578 if (DECL_CONTEXT (olddecl))
1579 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1580 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1581 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1582 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1583 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1584 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1585 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1586 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1587 SET_OVERLOADED_OPERATOR_CODE
1588 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1589 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1591 /* Optionally warn about more than one declaration for the same
1592 name, but don't warn about a function declaration followed by a
1594 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1595 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1596 /* Don't warn about extern decl followed by definition. */
1597 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1598 /* Don't warn about friends, let add_friend take care of it. */
1599 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1601 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1602 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1605 if (DECL_DELETED_FN (newdecl))
1607 error ("deleted definition of %qD", newdecl);
1608 error ("after previous declaration %q+D", olddecl);
1612 /* Deal with C++: must preserve virtual function table size. */
1613 if (TREE_CODE (olddecl) == TYPE_DECL)
1615 tree newtype = TREE_TYPE (newdecl);
1616 tree oldtype = TREE_TYPE (olddecl);
1618 if (newtype != error_mark_node && oldtype != error_mark_node
1619 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1620 CLASSTYPE_FRIEND_CLASSES (newtype)
1621 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1623 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1626 /* Copy all the DECL_... slots specified in the new decl
1627 except for any that we copy here from the old type. */
1628 DECL_ATTRIBUTES (newdecl)
1629 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1631 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1635 old_result = DECL_TEMPLATE_RESULT (olddecl);
1636 new_result = DECL_TEMPLATE_RESULT (newdecl);
1637 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1638 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1639 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1640 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1642 DECL_ATTRIBUTES (old_result)
1643 = (*targetm.merge_decl_attributes) (old_result, new_result);
1645 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1647 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1648 && DECL_INITIAL (new_result))
1650 if (DECL_INITIAL (old_result))
1651 DECL_UNINLINABLE (old_result) = 1;
1653 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1654 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1655 DECL_NOT_REALLY_EXTERN (old_result)
1656 = DECL_NOT_REALLY_EXTERN (new_result);
1657 DECL_INTERFACE_KNOWN (old_result)
1658 = DECL_INTERFACE_KNOWN (new_result);
1659 DECL_DECLARED_INLINE_P (old_result)
1660 = DECL_DECLARED_INLINE_P (new_result);
1661 DECL_DISREGARD_INLINE_LIMITS (old_result)
1662 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1667 DECL_DECLARED_INLINE_P (old_result)
1668 |= DECL_DECLARED_INLINE_P (new_result);
1669 DECL_DISREGARD_INLINE_LIMITS (old_result)
1670 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1671 check_redeclaration_exception_specification (newdecl, olddecl);
1675 /* If the new declaration is a definition, update the file and
1676 line information on the declaration, and also make
1677 the old declaration the same definition. */
1678 if (DECL_INITIAL (new_result) != NULL_TREE)
1680 DECL_SOURCE_LOCATION (olddecl)
1681 = DECL_SOURCE_LOCATION (old_result)
1682 = DECL_SOURCE_LOCATION (newdecl);
1683 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1684 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1687 DECL_ARGUMENTS (old_result)
1688 = DECL_ARGUMENTS (new_result);
1689 for (parm = DECL_ARGUMENTS (old_result); parm;
1690 parm = TREE_CHAIN (parm))
1691 DECL_CONTEXT (parm) = old_result;
1700 /* Automatically handles default parameters. */
1701 tree oldtype = TREE_TYPE (olddecl);
1704 /* Merge the data types specified in the two decls. */
1705 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1707 /* If merge_types produces a non-typedef type, just use the old type. */
1708 if (TREE_CODE (newdecl) == TYPE_DECL
1709 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1712 if (TREE_CODE (newdecl) == VAR_DECL)
1714 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1715 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1716 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1717 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1718 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1719 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1721 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1722 if (DECL_LANG_SPECIFIC (olddecl)
1723 && CP_DECL_THREADPRIVATE_P (olddecl))
1725 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1726 if (!DECL_LANG_SPECIFIC (newdecl))
1727 retrofit_lang_decl (newdecl);
1729 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1730 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1734 /* Do this after calling `merge_types' so that default
1735 parameters don't confuse us. */
1736 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1737 check_redeclaration_exception_specification (newdecl, olddecl);
1738 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1740 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1741 check_default_args (newdecl);
1743 /* Lay the type out, unless already done. */
1744 if (! same_type_p (newtype, oldtype)
1745 && TREE_TYPE (newdecl) != error_mark_node
1746 && !(processing_template_decl && uses_template_parms (newdecl)))
1747 layout_type (TREE_TYPE (newdecl));
1749 if ((TREE_CODE (newdecl) == VAR_DECL
1750 || TREE_CODE (newdecl) == PARM_DECL
1751 || TREE_CODE (newdecl) == RESULT_DECL
1752 || TREE_CODE (newdecl) == FIELD_DECL
1753 || TREE_CODE (newdecl) == TYPE_DECL)
1754 && !(processing_template_decl && uses_template_parms (newdecl)))
1755 layout_decl (newdecl, 0);
1757 /* Merge the type qualifiers. */
1758 if (TREE_READONLY (newdecl))
1759 TREE_READONLY (olddecl) = 1;
1760 if (TREE_THIS_VOLATILE (newdecl))
1761 TREE_THIS_VOLATILE (olddecl) = 1;
1762 if (TREE_NOTHROW (newdecl))
1763 TREE_NOTHROW (olddecl) = 1;
1765 /* Merge deprecatedness. */
1766 if (TREE_DEPRECATED (newdecl))
1767 TREE_DEPRECATED (olddecl) = 1;
1769 /* Preserve function specific target and optimization options */
1770 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1772 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1773 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1774 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1775 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1777 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1778 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1779 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1780 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1783 /* Merge the initialization information. */
1784 if (DECL_INITIAL (newdecl) == NULL_TREE
1785 && DECL_INITIAL (olddecl) != NULL_TREE)
1787 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1788 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1789 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1790 && DECL_LANG_SPECIFIC (newdecl)
1791 && DECL_LANG_SPECIFIC (olddecl))
1793 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1794 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1798 /* Merge the section attribute.
1799 We want to issue an error if the sections conflict but that must be
1800 done later in decl_attributes since we are called before attributes
1802 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1803 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1805 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1807 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1808 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1809 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1810 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1811 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1812 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1813 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1814 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1815 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1816 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1817 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1818 /* Keep the old RTL. */
1819 COPY_DECL_RTL (olddecl, newdecl);
1821 else if (TREE_CODE (newdecl) == VAR_DECL
1822 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1824 /* Keep the old RTL. We cannot keep the old RTL if the old
1825 declaration was for an incomplete object and the new
1826 declaration is not since many attributes of the RTL will
1828 COPY_DECL_RTL (olddecl, newdecl);
1831 /* If cannot merge, then use the new type and qualifiers,
1832 and don't preserve the old rtl. */
1835 /* Clean out any memory we had of the old declaration. */
1836 tree oldstatic = value_member (olddecl, static_aggregates);
1838 TREE_VALUE (oldstatic) = error_mark_node;
1840 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1841 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1842 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1843 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1846 /* Merge the storage class information. */
1847 merge_weak (newdecl, olddecl);
1849 if (DECL_ONE_ONLY (olddecl))
1850 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1852 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1853 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1854 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1855 if (! DECL_EXTERNAL (olddecl))
1856 DECL_EXTERNAL (newdecl) = 0;
1858 new_template_info = NULL_TREE;
1859 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1861 bool new_redefines_gnu_inline = false;
1863 if (new_defines_function
1864 && ((DECL_INTERFACE_KNOWN (olddecl)
1865 && TREE_CODE (olddecl) == FUNCTION_DECL)
1866 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1867 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1868 == FUNCTION_DECL))))
1872 if (TREE_CODE (fn) == TEMPLATE_DECL)
1873 fn = DECL_TEMPLATE_RESULT (olddecl);
1875 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1878 if (!new_redefines_gnu_inline)
1880 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1881 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1882 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1884 DECL_TEMPLATE_INSTANTIATED (newdecl)
1885 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1887 /* If the OLDDECL is an instantiation and/or specialization,
1888 then the NEWDECL must be too. But, it may not yet be marked
1889 as such if the caller has created NEWDECL, but has not yet
1890 figured out that it is a redeclaration. */
1891 if (!DECL_USE_TEMPLATE (newdecl))
1892 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1894 /* Don't really know how much of the language-specific
1895 values we should copy from old to new. */
1896 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1897 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1898 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1899 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1900 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1901 if (DECL_TEMPLATE_INFO (newdecl))
1902 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1903 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1904 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1905 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1906 olddecl_friend = DECL_FRIEND_P (olddecl);
1907 hidden_friend = (DECL_ANTICIPATED (olddecl)
1908 && DECL_HIDDEN_FRIEND_P (olddecl)
1909 && newdecl_is_friend);
1911 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1912 if (TREE_CODE (newdecl) == FUNCTION_DECL
1913 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1915 DECL_BEFRIENDING_CLASSES (newdecl)
1916 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1917 DECL_BEFRIENDING_CLASSES (olddecl));
1918 /* DECL_THUNKS is only valid for virtual functions,
1919 otherwise it is a DECL_FRIEND_CONTEXT. */
1920 if (DECL_VIRTUAL_P (newdecl))
1921 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1925 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1929 /* Merge parameter attributes. */
1930 tree oldarg, newarg;
1931 for (oldarg = DECL_ARGUMENTS(olddecl),
1932 newarg = DECL_ARGUMENTS(newdecl);
1934 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1935 DECL_ATTRIBUTES (newarg)
1936 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1937 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1940 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1941 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1943 /* If newdecl is not a specialization, then it is not a
1944 template-related function at all. And that means that we
1945 should have exited above, returning 0. */
1946 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1948 if (TREE_USED (olddecl))
1949 /* From [temp.expl.spec]:
1951 If a template, a member template or the member of a class
1952 template is explicitly specialized then that
1953 specialization shall be declared before the first use of
1954 that specialization that would cause an implicit
1955 instantiation to take place, in every translation unit in
1956 which such a use occurs. */
1957 error ("explicit specialization of %qD after first use",
1960 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1962 /* Don't propagate visibility from the template to the
1963 specialization here. We'll do that in determine_visibility if
1965 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1967 /* [temp.expl.spec/14] We don't inline explicit specialization
1968 just because the primary template says so. */
1970 else if (new_defines_function && DECL_INITIAL (olddecl))
1972 /* Never inline re-defined extern inline functions.
1973 FIXME: this could be better handled by keeping both
1974 function as separate declarations. */
1975 DECL_UNINLINABLE (newdecl) = 1;
1979 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1980 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1982 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1984 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1985 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1987 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1988 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1989 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1990 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1993 /* Preserve abstractness on cloned [cd]tors. */
1994 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1996 /* Update newdecl's parms to point at olddecl. */
1997 for (parm = DECL_ARGUMENTS (newdecl); parm;
1998 parm = TREE_CHAIN (parm))
1999 DECL_CONTEXT (parm) = olddecl;
2003 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2004 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2005 COPY_DECL_RTL (newdecl, olddecl);
2007 if (! types_match || new_defines_function)
2009 /* These need to be copied so that the names are available.
2010 Note that if the types do match, we'll preserve inline
2011 info and other bits, but if not, we won't. */
2012 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2013 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2015 if (new_defines_function)
2016 /* If defining a function declared with other language
2017 linkage, use the previously declared language linkage. */
2018 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2019 else if (types_match)
2021 /* If redeclaring a builtin function, and not a definition,
2022 it stays built in. */
2023 if (DECL_BUILT_IN (olddecl))
2025 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2026 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2027 /* If we're keeping the built-in definition, keep the rtl,
2028 regardless of declaration matches. */
2029 COPY_DECL_RTL (olddecl, newdecl);
2032 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2033 /* Don't clear out the arguments if we're just redeclaring a
2035 if (DECL_ARGUMENTS (olddecl))
2036 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2039 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2040 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2042 /* Now preserve various other info from the definition. */
2043 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2044 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2045 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2046 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2048 /* Warn about conflicting visibility specifications. */
2049 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2050 && DECL_VISIBILITY_SPECIFIED (newdecl)
2051 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2053 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2054 "because it", newdecl);
2055 warning (OPT_Wattributes, "%Jconflicts with previous "
2056 "declaration here", olddecl);
2058 /* Choose the declaration which specified visibility. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2061 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2062 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2064 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2065 so keep this behavior. */
2066 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2068 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2069 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2072 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2073 with that from NEWDECL below. */
2074 if (DECL_LANG_SPECIFIC (olddecl))
2076 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2077 != DECL_LANG_SPECIFIC (newdecl));
2078 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2081 /* Merge the USED information. */
2082 if (TREE_USED (olddecl))
2083 TREE_USED (newdecl) = 1;
2084 else if (TREE_USED (newdecl))
2085 TREE_USED (olddecl) = 1;
2087 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2091 function_size = sizeof (struct tree_decl_common);
2093 memcpy ((char *) olddecl + sizeof (struct tree_common),
2094 (char *) newdecl + sizeof (struct tree_common),
2095 function_size - sizeof (struct tree_common));
2097 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2098 (char *) newdecl + sizeof (struct tree_decl_common),
2099 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2100 if (new_template_info)
2101 /* If newdecl is a template instantiation, it is possible that
2102 the following sequence of events has occurred:
2104 o A friend function was declared in a class template. The
2105 class template was instantiated.
2107 o The instantiation of the friend declaration was
2108 recorded on the instantiation list, and is newdecl.
2110 o Later, however, instantiate_class_template called pushdecl
2111 on the newdecl to perform name injection. But, pushdecl in
2112 turn called duplicate_decls when it discovered that another
2113 declaration of a global function with the same name already
2116 o Here, in duplicate_decls, we decided to clobber newdecl.
2118 If we're going to do that, we'd better make sure that
2119 olddecl, and not newdecl, is on the list of
2120 instantiations so that if we try to do the instantiation
2121 again we won't get the clobbered declaration. */
2122 reregister_specialization (newdecl,
2128 size_t size = tree_code_size (TREE_CODE (olddecl));
2129 memcpy ((char *) olddecl + sizeof (struct tree_common),
2130 (char *) newdecl + sizeof (struct tree_common),
2131 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2132 switch (TREE_CODE (olddecl))
2142 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2143 (char *) newdecl + sizeof (struct tree_decl_common),
2144 size - sizeof (struct tree_decl_common)
2145 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2149 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2150 (char *) newdecl + sizeof (struct tree_decl_common),
2151 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2152 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2156 DECL_UID (olddecl) = olddecl_uid;
2158 DECL_FRIEND_P (olddecl) = 1;
2161 DECL_ANTICIPATED (olddecl) = 1;
2162 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2165 /* NEWDECL contains the merged attribute lists.
2166 Update OLDDECL to be the same. */
2167 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2169 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2170 so that encode_section_info has a chance to look at the new decl
2171 flags and attributes. */
2172 if (DECL_RTL_SET_P (olddecl)
2173 && (TREE_CODE (olddecl) == FUNCTION_DECL
2174 || (TREE_CODE (olddecl) == VAR_DECL
2175 && TREE_STATIC (olddecl))))
2176 make_decl_rtl (olddecl);
2178 /* The NEWDECL will no longer be needed. Because every out-of-class
2179 declaration of a member results in a call to duplicate_decls,
2180 freeing these nodes represents in a significant savings. */
2186 /* Return zero if the declaration NEWDECL is valid
2187 when the declaration OLDDECL (assumed to be for the same name)
2188 has already been seen.
2189 Otherwise return an error message format string with a %s
2190 where the identifier should go. */
2193 redeclaration_error_message (tree newdecl, tree olddecl)
2195 if (TREE_CODE (newdecl) == TYPE_DECL)
2197 /* Because C++ can put things into name space for free,
2198 constructs like "typedef struct foo { ... } foo"
2199 would look like an erroneous redeclaration. */
2200 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2203 return "redefinition of %q#D";
2205 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2207 /* If this is a pure function, its olddecl will actually be
2208 the original initialization to `0' (which we force to call
2209 abort()). Don't complain about redefinition in this case. */
2210 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2211 && DECL_INITIAL (olddecl) == NULL_TREE)
2214 /* If both functions come from different namespaces, this is not
2215 a redeclaration - this is a conflict with a used function. */
2216 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2217 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2218 && ! decls_match (olddecl, newdecl))
2219 return "%qD conflicts with used function";
2221 /* We'll complain about linkage mismatches in
2222 warn_extern_redeclared_static. */
2224 /* Defining the same name twice is no good. */
2225 if (DECL_INITIAL (olddecl) != NULL_TREE
2226 && DECL_INITIAL (newdecl) != NULL_TREE)
2228 if (DECL_NAME (olddecl) == NULL_TREE)
2229 return "%q#D not declared in class";
2230 else if (!GNU_INLINE_P (olddecl)
2231 || GNU_INLINE_P (newdecl))
2232 return "redefinition of %q#D";
2235 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2237 bool olda = GNU_INLINE_P (olddecl);
2238 bool newa = GNU_INLINE_P (newdecl);
2243 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2245 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2251 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2255 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2257 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2258 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2259 return "redefinition of %q#D";
2263 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2264 || (DECL_TEMPLATE_RESULT (newdecl)
2265 == DECL_TEMPLATE_RESULT (olddecl)))
2268 nt = DECL_TEMPLATE_RESULT (newdecl);
2269 if (DECL_TEMPLATE_INFO (nt))
2270 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2271 ot = DECL_TEMPLATE_RESULT (olddecl);
2272 if (DECL_TEMPLATE_INFO (ot))
2273 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2274 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2275 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2276 return "redefinition of %q#D";
2278 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2280 bool olda = GNU_INLINE_P (ot);
2281 bool newa = GNU_INLINE_P (nt);
2286 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2288 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2292 /* Core issue #226 (C++0x):
2294 If a friend function template declaration specifies a
2295 default template-argument, that declaration shall be a
2296 definition and shall be the only declaration of the
2297 function template in the translation unit. */
2298 if ((cxx_dialect != cxx98)
2299 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2300 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2301 /*is_primary=*/1, /*is_partial=*/0,
2302 /*is_friend_decl=*/2))
2303 return "redeclaration of friend %q#D may not have default template arguments";
2307 else if (TREE_CODE (newdecl) == VAR_DECL
2308 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2309 && (! DECL_LANG_SPECIFIC (olddecl)
2310 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2311 || DECL_THREAD_LOCAL_P (newdecl)))
2313 /* Only variables can be thread-local, and all declarations must
2314 agree on this property. */
2315 if (DECL_THREAD_LOCAL_P (newdecl))
2316 return "thread-local declaration of %q#D follows "
2317 "non-thread-local declaration";
2319 return "non-thread-local declaration of %q#D follows "
2320 "thread-local declaration";
2322 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2324 /* The objects have been declared at namespace scope. If either
2325 is a member of an anonymous union, then this is an invalid
2326 redeclaration. For example:
2332 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2333 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2334 return "redeclaration of %q#D";
2335 /* If at least one declaration is a reference, there is no
2336 conflict. For example:
2342 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2344 /* Reject two definitions. */
2345 return "redefinition of %q#D";
2349 /* Objects declared with block scope: */
2350 /* Reject two definitions, and reject a definition
2351 together with an external reference. */
2352 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2353 return "redeclaration of %q#D";
2358 /* Hash and equality functions for the named_label table. */
2361 named_label_entry_hash (const void *data)
2363 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2364 return DECL_UID (ent->label_decl);
2368 named_label_entry_eq (const void *a, const void *b)
2370 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2371 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2372 return ent_a->label_decl == ent_b->label_decl;
2375 /* Create a new label, named ID. */
2378 make_label_decl (tree id, int local_p)
2380 struct named_label_entry *ent;
2384 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2386 DECL_CONTEXT (decl) = current_function_decl;
2387 DECL_MODE (decl) = VOIDmode;
2388 C_DECLARED_LABEL_FLAG (decl) = local_p;
2390 /* Say where one reference is to the label, for the sake of the
2391 error if it is not defined. */
2392 DECL_SOURCE_LOCATION (decl) = input_location;
2394 /* Record the fact that this identifier is bound to this label. */
2395 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2397 /* Create the label htab for the function on demand. */
2399 named_labels = htab_create_ggc (13, named_label_entry_hash,
2400 named_label_entry_eq, NULL);
2402 /* Record this label on the list of labels used in this function.
2403 We do this before calling make_label_decl so that we get the
2404 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2405 ent = GGC_CNEW (struct named_label_entry);
2406 ent->label_decl = decl;
2408 slot = htab_find_slot (named_labels, ent, INSERT);
2409 gcc_assert (*slot == NULL);
2415 /* Look for a label named ID in the current function. If one cannot
2416 be found, create one. (We keep track of used, but undefined,
2417 labels, and complain about them at the end of a function.) */
2420 lookup_label (tree id)
2424 timevar_push (TV_NAME_LOOKUP);
2425 /* You can't use labels at global scope. */
2426 if (current_function_decl == NULL_TREE)
2428 error ("label %qE referenced outside of any function", id);
2429 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2432 /* See if we've already got this label. */
2433 decl = IDENTIFIER_LABEL_VALUE (id);
2434 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2435 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2437 decl = make_label_decl (id, /*local_p=*/0);
2438 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2441 /* Declare a local label named ID. */
2444 declare_local_label (tree id)
2448 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2449 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2450 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2451 current_binding_level->shadowed_labels);
2452 current_binding_level->shadowed_labels = shadow;
2454 decl = make_label_decl (id, /*local_p=*/1);
2455 TREE_VALUE (shadow) = decl;
2460 /* Returns nonzero if it is ill-formed to jump past the declaration of
2461 DECL. Returns 2 if it's also a real problem. */
2464 decl_jump_unsafe (tree decl)
2466 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2467 || TREE_TYPE (decl) == error_mark_node)
2470 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2471 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2474 if (pod_type_p (TREE_TYPE (decl)))
2477 /* The POD stuff is just pedantry; why should it matter if the class
2478 contains a field of pointer to member type? */
2482 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2485 identify_goto (tree decl, const location_t *locus)
2488 permerror (input_location, "jump to label %qD", decl);
2490 permerror (input_location, "jump to case label");
2492 permerror (input_location, "%H from here", locus);
2495 /* Check that a single previously seen jump to a newly defined label
2496 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2497 the jump context; NAMES are the names in scope in LEVEL at the jump
2498 context; LOCUS is the source position of the jump or 0. Returns
2499 true if all is well. */
2502 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2503 bool exited_omp, const location_t *locus)
2505 struct cp_binding_level *b;
2506 bool identified = false, saw_eh = false, saw_omp = false;
2510 identify_goto (decl, locus);
2511 error (" exits OpenMP structured block");
2512 identified = saw_omp = true;
2515 for (b = current_binding_level; b ; b = b->level_chain)
2517 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2519 for (new_decls = b->names; new_decls != old_decls;
2520 new_decls = TREE_CHAIN (new_decls))
2522 int problem = decl_jump_unsafe (new_decls);
2528 identify_goto (decl, locus);
2532 error (" crosses initialization of %q+#D", new_decls);
2534 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2539 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2543 identify_goto (decl, locus);
2546 if (b->kind == sk_try)
2547 error (" enters try block");
2549 error (" enters catch block");
2552 if (b->kind == sk_omp && !saw_omp)
2556 identify_goto (decl, locus);
2559 error (" enters OpenMP structured block");
2568 check_previous_goto (tree decl, struct named_label_use_entry *use)
2570 check_previous_goto_1 (decl, use->binding_level,
2571 use->names_in_scope, use->in_omp_scope,
2572 &use->o_goto_locus);
2576 check_switch_goto (struct cp_binding_level* level)
2578 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2581 /* Check that a new jump to a label DECL is OK. Called by
2582 finish_goto_stmt. */
2585 check_goto (tree decl)
2587 struct named_label_entry *ent, dummy;
2588 bool saw_catch = false, identified = false;
2591 /* We can't know where a computed goto is jumping.
2592 So we assume that it's OK. */
2593 if (TREE_CODE (decl) != LABEL_DECL)
2596 /* We didn't record any information about this label when we created it,
2597 and there's not much point since it's trivial to analyze as a return. */
2598 if (decl == cdtor_label)
2601 dummy.label_decl = decl;
2602 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2603 gcc_assert (ent != NULL);
2605 /* If the label hasn't been defined yet, defer checking. */
2606 if (! DECL_INITIAL (decl))
2608 struct named_label_use_entry *new_use;
2610 /* Don't bother creating another use if the last goto had the
2611 same data, and will therefore create the same set of errors. */
2613 && ent->uses->names_in_scope == current_binding_level->names)
2616 new_use = GGC_NEW (struct named_label_use_entry);
2617 new_use->binding_level = current_binding_level;
2618 new_use->names_in_scope = current_binding_level->names;
2619 new_use->o_goto_locus = input_location;
2620 new_use->in_omp_scope = false;
2622 new_use->next = ent->uses;
2623 ent->uses = new_use;
2627 if (ent->in_try_scope || ent->in_catch_scope
2628 || ent->in_omp_scope || ent->bad_decls)
2630 permerror (input_location, "jump to label %q+D", decl);
2631 permerror (input_location, " from here");
2635 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2637 tree b = TREE_VALUE (bad);
2638 int u = decl_jump_unsafe (b);
2640 if (u > 1 && DECL_ARTIFICIAL (b))
2642 /* Can't skip init of __exception_info. */
2643 error ("%J enters catch block", b);
2647 error (" skips initialization of %q+#D", b);
2649 permerror (input_location, " enters scope of non-POD %q+#D", b);
2652 if (ent->in_try_scope)
2653 error (" enters try block");
2654 else if (ent->in_catch_scope && !saw_catch)
2655 error (" enters catch block");
2657 if (ent->in_omp_scope)
2658 error (" enters OpenMP structured block");
2659 else if (flag_openmp)
2661 struct cp_binding_level *b;
2662 for (b = current_binding_level; b ; b = b->level_chain)
2664 if (b == ent->binding_level)
2666 if (b->kind == sk_omp)
2670 permerror (input_location, "jump to label %q+D", decl);
2671 permerror (input_location, " from here");
2674 error (" exits OpenMP structured block");
2681 /* Check that a return is ok wrt OpenMP structured blocks.
2682 Called by finish_return_stmt. Returns true if all is well. */
2685 check_omp_return (void)
2687 struct cp_binding_level *b;
2688 for (b = current_binding_level; b ; b = b->level_chain)
2689 if (b->kind == sk_omp)
2691 error ("invalid exit from OpenMP structured block");
2697 /* Define a label, specifying the location in the source file.
2698 Return the LABEL_DECL node for the label. */
2701 define_label (location_t location, tree name)
2703 struct named_label_entry *ent, dummy;
2704 struct cp_binding_level *p;
2707 timevar_push (TV_NAME_LOOKUP);
2709 decl = lookup_label (name);
2711 dummy.label_decl = decl;
2712 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2713 gcc_assert (ent != NULL);
2715 /* After labels, make any new cleanups in the function go into their
2716 own new (temporary) binding contour. */
2717 for (p = current_binding_level;
2718 p->kind != sk_function_parms;
2720 p->more_cleanups_ok = 0;
2722 if (name == get_identifier ("wchar_t"))
2723 permerror (input_location, "label named wchar_t");
2725 if (DECL_INITIAL (decl) != NULL_TREE)
2727 error ("duplicate label %qD", decl);
2728 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2732 struct named_label_use_entry *use;
2734 /* Mark label as having been defined. */
2735 DECL_INITIAL (decl) = error_mark_node;
2736 /* Say where in the source. */
2737 DECL_SOURCE_LOCATION (decl) = location;
2739 ent->binding_level = current_binding_level;
2740 ent->names_in_scope = current_binding_level->names;
2742 for (use = ent->uses; use ; use = use->next)
2743 check_previous_goto (decl, use);
2747 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2752 struct cp_binding_level *level;
2753 struct cp_switch *next;
2754 /* The SWITCH_STMT being built. */
2756 /* A splay-tree mapping the low element of a case range to the high
2757 element, or NULL_TREE if there is no high element. Used to
2758 determine whether or not a new case label duplicates an old case
2759 label. We need a tree, rather than simply a hash table, because
2760 of the GNU case range extension. */
2764 /* A stack of the currently active switch statements. The innermost
2765 switch statement is on the top of the stack. There is no need to
2766 mark the stack for garbage collection because it is only active
2767 during the processing of the body of a function, and we never
2768 collect at that point. */
2770 static struct cp_switch *switch_stack;
2772 /* Called right after a switch-statement condition is parsed.
2773 SWITCH_STMT is the switch statement being parsed. */
2776 push_switch (tree switch_stmt)
2778 struct cp_switch *p = XNEW (struct cp_switch);
2779 p->level = current_binding_level;
2780 p->next = switch_stack;
2781 p->switch_stmt = switch_stmt;
2782 p->cases = splay_tree_new (case_compare, NULL, NULL);
2789 struct cp_switch *cs = switch_stack;
2790 location_t switch_location;
2792 /* Emit warnings as needed. */
2793 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2794 switch_location = EXPR_LOCATION (cs->switch_stmt);
2796 switch_location = input_location;
2797 if (!processing_template_decl)
2798 c_do_switch_warnings (cs->cases, switch_location,
2799 SWITCH_STMT_TYPE (cs->switch_stmt),
2800 SWITCH_STMT_COND (cs->switch_stmt));
2802 splay_tree_delete (cs->cases);
2803 switch_stack = switch_stack->next;
2807 /* Note that we've seen a definition of a case label, and complain if this
2808 is a bad place for one. */
2811 finish_case_label (location_t loc, tree low_value, tree high_value)
2814 struct cp_binding_level *p;
2816 if (processing_template_decl)
2820 /* For templates, just add the case label; we'll do semantic
2821 analysis at instantiation-time. */
2822 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2823 return add_stmt (build_case_label (loc, low_value, high_value, label));
2826 /* Find the condition on which this switch statement depends. */
2827 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2828 if (cond && TREE_CODE (cond) == TREE_LIST)
2829 cond = TREE_VALUE (cond);
2831 if (!check_switch_goto (switch_stack->level))
2832 return error_mark_node;
2834 r = c_add_case_label (loc, switch_stack->cases, cond,
2835 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2836 low_value, high_value);
2838 /* After labels, make any new cleanups in the function go into their
2839 own new (temporary) binding contour. */
2840 for (p = current_binding_level;
2841 p->kind != sk_function_parms;
2843 p->more_cleanups_ok = 0;
2848 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2851 typename_hash (const void* k)
2854 const_tree const t = (const_tree) k;
2856 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2857 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2862 typedef struct typename_info {
2870 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2871 really of type `typename_info*' */
2874 typename_compare (const void * k1, const void * k2)
2876 const_tree const t1 = (const_tree) k1;
2877 const typename_info *const t2 = (const typename_info *) k2;
2879 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2880 && TYPE_CONTEXT (t1) == t2->scope
2881 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2882 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2883 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2886 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2887 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2889 Returns the new TYPENAME_TYPE. */
2891 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2894 build_typename_type (tree context, tree name, tree fullname,
2895 enum tag_types tag_type)
2903 if (typename_htab == NULL)
2904 typename_htab = htab_create_ggc (61, &typename_hash,
2905 &typename_compare, NULL);
2907 ti.scope = FROB_CONTEXT (context);
2909 ti.template_id = fullname;
2910 ti.enum_p = tag_type == enum_type;
2911 ti.class_p = (tag_type == class_type
2912 || tag_type == record_type
2913 || tag_type == union_type);
2914 hash = (htab_hash_pointer (ti.scope)
2915 ^ htab_hash_pointer (ti.name));
2917 /* See if we already have this type. */
2918 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2923 /* Build the TYPENAME_TYPE. */
2924 t = cxx_make_type (TYPENAME_TYPE);
2925 TYPE_CONTEXT (t) = ti.scope;
2926 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2927 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2928 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2930 /* Build the corresponding TYPE_DECL. */
2931 d = build_decl (input_location, TYPE_DECL, name, t);
2932 TYPE_NAME (TREE_TYPE (d)) = d;
2933 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2934 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2935 DECL_ARTIFICIAL (d) = 1;
2937 /* Store it in the hash table. */
2940 /* TYPENAME_TYPEs must always be compared structurally, because
2941 they may or may not resolve down to another type depending on
2942 the currently open classes. */
2943 SET_TYPE_STRUCTURAL_EQUALITY (t);
2949 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2950 provided to name the type. Returns an appropriate type, unless an
2951 error occurs, in which case error_mark_node is returned. If we
2952 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2953 return that, rather than the _TYPE it corresponds to, in other
2954 cases we look through the type decl. If TF_ERROR is set, complain
2955 about errors, otherwise be quiet. */
2958 make_typename_type (tree context, tree name, enum tag_types tag_type,
2959 tsubst_flags_t complain)
2965 if (name == error_mark_node
2966 || context == NULL_TREE
2967 || context == error_mark_node)
2968 return error_mark_node;
2972 if (!(TYPE_LANG_SPECIFIC (name)
2973 && (CLASSTYPE_IS_TEMPLATE (name)
2974 || CLASSTYPE_USE_TEMPLATE (name))))
2975 name = TYPE_IDENTIFIER (name);
2977 /* Create a TEMPLATE_ID_EXPR for the type. */
2978 name = build_nt (TEMPLATE_ID_EXPR,
2979 CLASSTYPE_TI_TEMPLATE (name),
2980 CLASSTYPE_TI_ARGS (name));
2982 else if (TREE_CODE (name) == TYPE_DECL)
2983 name = DECL_NAME (name);
2987 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2989 name = TREE_OPERAND (name, 0);
2990 if (TREE_CODE (name) == TEMPLATE_DECL)
2991 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2992 else if (TREE_CODE (name) == OVERLOAD)
2994 error ("%qD is not a type", name);
2995 return error_mark_node;
2998 if (TREE_CODE (name) == TEMPLATE_DECL)
3000 error ("%qD used without template parameters", name);
3001 return error_mark_node;
3003 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3004 gcc_assert (TYPE_P (context));
3006 if (!MAYBE_CLASS_TYPE_P (context))
3008 if (complain & tf_error)
3009 error ("%q#T is not a class", context);
3010 return error_mark_node;
3013 /* When the CONTEXT is a dependent type, NAME could refer to a
3014 dependent base class of CONTEXT. But look inside it anyway
3015 if CONTEXT is a currently open scope, in case it refers to a
3016 member of the current instantiation or a non-dependent base;
3017 lookup will stop when we hit a dependent base. */
3018 if (!dependent_scope_p (context))
3019 /* We should only set WANT_TYPE when we're a nested typename type.
3020 Then we can give better diagnostics if we find a non-type. */
3021 t = lookup_field (context, name, 0, /*want_type=*/true);
3025 if (!t && dependent_type_p (context))
3026 return build_typename_type (context, name, fullname, tag_type);
3028 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3032 if (complain & tf_error)
3033 error (want_template ? "no class template named %q#T in %q#T"
3034 : "no type named %q#T in %q#T", name, context);
3035 return error_mark_node;
3038 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3040 if (complain & tf_error)
3041 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3043 return error_mark_node;
3045 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3047 if (complain & tf_error)
3048 error ("%<typename %T::%D%> names %q#T, which is not a type",
3050 return error_mark_node;
3053 if (complain & tf_error)
3054 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3057 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3059 /*entering_scope=*/0,
3060 tf_warning_or_error | tf_user);
3062 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3068 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3069 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3070 in which case error_mark_node is returned.
3072 If PARM_LIST is non-NULL, also make sure that the template parameter
3073 list of TEMPLATE_DECL matches.
3075 If COMPLAIN zero, don't complain about any errors that occur. */
3078 make_unbound_class_template (tree context, tree name, tree parm_list,
3079 tsubst_flags_t complain)
3085 name = TYPE_IDENTIFIER (name);
3086 else if (DECL_P (name))
3087 name = DECL_NAME (name);
3088 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3090 if (!dependent_type_p (context)
3091 || currently_open_class (context))
3093 tree tmpl = NULL_TREE;
3095 if (MAYBE_CLASS_TYPE_P (context))
3096 tmpl = lookup_field (context, name, 0, false);
3098 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3100 if (complain & tf_error)
3101 error ("no class template named %q#T in %q#T", name, context);
3102 return error_mark_node;
3106 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3108 if (complain & tf_error)
3110 error ("template parameters do not match template");
3111 error ("%q+D declared here", tmpl);
3113 return error_mark_node;
3116 if (complain & tf_error)
3117 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3122 /* Build the UNBOUND_CLASS_TEMPLATE. */
3123 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3124 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3125 TREE_TYPE (t) = NULL_TREE;
3126 SET_TYPE_STRUCTURAL_EQUALITY (t);
3128 /* Build the corresponding TEMPLATE_DECL. */
3129 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3130 TYPE_NAME (TREE_TYPE (d)) = d;
3131 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3132 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3133 DECL_ARTIFICIAL (d) = 1;
3134 DECL_TEMPLATE_PARMS (d) = parm_list;
3141 /* Push the declarations of builtin types into the namespace.
3142 RID_INDEX is the index of the builtin type in the array
3143 RID_POINTERS. NAME is the name used when looking up the builtin
3144 type. TYPE is the _TYPE node for the builtin type. */
3147 record_builtin_type (enum rid rid_index,
3151 tree rname = NULL_TREE, tname = NULL_TREE;
3152 tree tdecl = NULL_TREE;
3154 if ((int) rid_index < (int) RID_MAX)
3155 rname = ridpointers[(int) rid_index];
3157 tname = get_identifier (name);
3159 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3160 eliminated. Built-in types should not be looked up name; their
3161 names are keywords that the parser can recognize. However, there
3162 is code in c-common.c that uses identifier_global_value to look
3163 up built-in types by name. */
3166 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3167 DECL_ARTIFICIAL (tdecl) = 1;
3168 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3174 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3175 DECL_ARTIFICIAL (tdecl) = 1;
3177 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3180 if (!TYPE_NAME (type))
3181 TYPE_NAME (type) = tdecl;
3184 debug_hooks->type_decl (tdecl, 0);
3187 /* Record one of the standard Java types.
3188 * Declare it as having the given NAME.
3189 * If SIZE > 0, it is the size of one of the integral types;
3190 * otherwise it is the negative of the size of one of the other types. */
3193 record_builtin_java_type (const char* name, int size)
3197 type = build_nonstandard_integer_type (size, 0);
3198 else if (size > -32)
3201 /* "__java_char" or ""__java_boolean". */
3202 type = build_nonstandard_integer_type (-size, 1);
3203 /* Get the signed type cached and attached to the unsigned type,
3204 so it doesn't get garbage-collected at "random" times,
3205 causing potential codegen differences out of different UIDs
3206 and different alias set numbers. */
3207 stype = build_nonstandard_integer_type (-size, 0);
3208 TREE_CHAIN (type) = stype;
3209 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3212 { /* "__java_float" or ""__java_double". */
3213 type = make_node (REAL_TYPE);
3214 TYPE_PRECISION (type) = - size;
3217 record_builtin_type (RID_MAX, name, type);
3218 decl = TYPE_NAME (type);
3220 /* Suppress generate debug symbol entries for these types,
3221 since for normal C++ they are just clutter.
3222 However, push_lang_context undoes this if extern "Java" is seen. */
3223 DECL_IGNORED_P (decl) = 1;
3225 TYPE_FOR_JAVA (type) = 1;
3229 /* Push a type into the namespace so that the back ends ignore it. */
3232 record_unknown_type (tree type, const char* name)
3234 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3235 TYPE_DECL, get_identifier (name), type));
3236 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3237 DECL_IGNORED_P (decl) = 1;
3238 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3239 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3240 TYPE_ALIGN (type) = 1;
3241 TYPE_USER_ALIGN (type) = 0;
3242 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3245 /* A string for which we should create an IDENTIFIER_NODE at
3248 typedef struct predefined_identifier
3250 /* The name of the identifier. */
3251 const char *const name;
3252 /* The place where the IDENTIFIER_NODE should be stored. */
3254 /* Nonzero if this is the name of a constructor or destructor. */
3255 const int ctor_or_dtor_p;
3256 } predefined_identifier;
3258 /* Create all the predefined identifiers. */
3261 initialize_predefined_identifiers (void)
3263 const predefined_identifier *pid;
3265 /* A table of identifiers to create at startup. */
3266 static const predefined_identifier predefined_identifiers[] = {
3267 { "C++", &lang_name_cplusplus, 0 },
3268 { "C", &lang_name_c, 0 },
3269 { "Java", &lang_name_java, 0 },
3270 /* Some of these names have a trailing space so that it is
3271 impossible for them to conflict with names written by users. */
3272 { "__ct ", &ctor_identifier, 1 },
3273 { "__base_ctor ", &base_ctor_identifier, 1 },
3274 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3275 { "__dt ", &dtor_identifier, 1 },
3276 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3277 { "__base_dtor ", &base_dtor_identifier, 1 },
3278 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3279 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3280 { "nelts", &nelts_identifier, 0 },
3281 { THIS_NAME, &this_identifier, 0 },
3282 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3283 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3284 { "_vptr", &vptr_identifier, 0 },
3285 { "__vtt_parm", &vtt_parm_identifier, 0 },
3286 { "::", &global_scope_name, 0 },
3287 { "std", &std_identifier, 0 },
3291 for (pid = predefined_identifiers; pid->name; ++pid)
3293 *pid->node = get_identifier (pid->name);
3294 if (pid->ctor_or_dtor_p)
3295 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3299 /* Create the predefined scalar types of C,
3300 and some nodes representing standard constants (0, 1, (void *)0).
3301 Initialize the global binding level.
3302 Make definitions for built-in primitive functions. */
3305 cxx_init_decl_processing (void)
3308 tree void_ftype_ptr;
3310 build_common_tree_nodes (flag_signed_char, false);
3312 /* Create all the identifiers we need. */
3313 initialize_predefined_identifiers ();
3315 /* Create the global variables. */
3316 push_to_top_level ();
3318 current_function_decl = NULL_TREE;
3319 current_binding_level = NULL;
3320 /* Enter the global namespace. */
3321 gcc_assert (global_namespace == NULL_TREE);
3322 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3324 TREE_PUBLIC (global_namespace) = 1;
3325 begin_scope (sk_namespace, global_namespace);
3327 current_lang_name = NULL_TREE;
3329 if (flag_visibility_ms_compat)
3330 default_visibility = VISIBILITY_HIDDEN;
3333 current_lang_name = lang_name_c;
3335 /* Create the `std' namespace. */
3336 push_namespace (std_identifier);
3337 std_node = current_namespace;
3340 c_common_nodes_and_builtins ();
3342 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3343 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3344 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3345 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3346 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3347 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3348 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3349 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3351 integer_two_node = build_int_cst (NULL_TREE, 2);
3352 integer_three_node = build_int_cst (NULL_TREE, 3);
3354 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3355 truthvalue_type_node = boolean_type_node;
3356 truthvalue_false_node = boolean_false_node;
3357 truthvalue_true_node = boolean_true_node;
3359 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3362 record_builtin_type (RID_MAX, NULL, string_type_node);
3365 delta_type_node = ptrdiff_type_node;
3366 vtable_index_type = ptrdiff_type_node;
3368 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3369 void_ftype = build_function_type (void_type_node, void_list_node);
3370 void_ftype_ptr = build_function_type (void_type_node,
3371 tree_cons (NULL_TREE,
3375 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3377 /* C++ extensions */
3379 unknown_type_node = make_node (UNKNOWN_TYPE);
3380 record_unknown_type (unknown_type_node, "unknown type");
3382 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3383 TREE_TYPE (unknown_type_node) = unknown_type_node;
3385 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3387 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3388 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3390 init_list_type_node = make_node (UNKNOWN_TYPE);
3391 record_unknown_type (init_list_type_node, "init list");
3394 /* Make sure we get a unique function type, so we can give
3395 its pointer type a name. (This wins for gdb.) */
3396 tree vfunc_type = make_node (FUNCTION_TYPE);
3397 TREE_TYPE (vfunc_type) = integer_type_node;
3398 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3399 layout_type (vfunc_type);
3401 vtable_entry_type = build_pointer_type (vfunc_type);
3403 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3406 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3407 layout_type (vtbl_type_node);
3408 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3409 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3410 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3411 layout_type (vtbl_ptr_type_node);
3412 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3414 push_namespace (get_identifier ("__cxxabiv1"));
3415 abi_node = current_namespace;
3418 global_type_node = make_node (LANG_TYPE);
3419 record_unknown_type (global_type_node, "global type");
3422 current_lang_name = lang_name_cplusplus;
3426 tree bad_alloc_type_node;
3427 tree bad_alloc_decl;
3428 tree newtype, deltype;
3429 tree ptr_ftype_sizetype;
3431 push_namespace (std_identifier);
3432 bad_alloc_id = get_identifier ("bad_alloc");
3433 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3434 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3436 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3437 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3438 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3442 = build_function_type (ptr_type_node,
3443 tree_cons (NULL_TREE,
3446 newtype = build_exception_variant
3447 (ptr_ftype_sizetype, add_exception_specifier
3448 (NULL_TREE, bad_alloc_type_node, -1));
3449 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3450 push_cp_library_fn (NEW_EXPR, newtype);
3451 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3452 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3453 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3457 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3459 /* Perform other language dependent initializations. */
3460 init_class_processing ();
3461 init_rtti_processing ();
3462 init_template_processing ();
3464 if (flag_exceptions)
3465 init_exception_processing ();
3467 if (! supports_one_only ())
3470 make_fname_decl = cp_make_fname_decl;
3471 start_fname_decls ();
3473 /* Show we use EH for cleanups. */
3474 if (flag_exceptions)
3475 using_eh_for_cleanups ();
3478 /* Generate an initializer for a function naming variable from
3479 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3480 filled in with the type of the init. */
3483 cp_fname_init (const char* name, tree *type_p)
3485 tree domain = NULL_TREE;
3487 tree init = NULL_TREE;
3492 length = strlen (name);
3493 domain = build_index_type (size_int (length));
3494 init = build_string (length + 1, name);
3497 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3498 type = build_cplus_array_type (type, domain);
3503 TREE_TYPE (init) = type;
3505 init = error_mark_node;
3510 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3511 the decl, LOC is the location to give the decl, NAME is the
3512 initialization string and TYPE_DEP indicates whether NAME depended
3513 on the type of the function. We make use of that to detect
3514 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3515 at the point of first use, so we mustn't push the decl now. */
3518 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3520 const char *const name = (type_dep && processing_template_decl
3521 ? NULL : fname_as_string (type_dep));
3523 tree init = cp_fname_init (name, &type);
3524 tree decl = build_decl (loc, VAR_DECL, id, type);
3527 free (CONST_CAST (char *, name));
3529 /* As we're using pushdecl_with_scope, we must set the context. */
3530 DECL_CONTEXT (decl) = current_function_decl;
3531 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3533 TREE_STATIC (decl) = 1;
3534 TREE_READONLY (decl) = 1;
3535 DECL_ARTIFICIAL (decl) = 1;
3537 TREE_USED (decl) = 1;
3539 if (current_function_decl)
3541 struct cp_binding_level *b = current_binding_level;
3542 while (b->level_chain->kind != sk_function_parms)
3544 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3545 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3546 LOOKUP_ONLYCONVERTING);
3549 pushdecl_top_level_and_finish (decl, init);
3555 builtin_function_1 (tree decl, tree context, bool is_global)
3557 tree id = DECL_NAME (decl);
3558 const char *name = IDENTIFIER_POINTER (id);
3560 retrofit_lang_decl (decl);
3562 /* All nesting of C++ functions is lexical; there is never a "static
3563 chain" in the sense of GNU C nested functions. */
3564 DECL_NO_STATIC_CHAIN (decl) = 1;
3566 DECL_ARTIFICIAL (decl) = 1;
3567 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3568 SET_DECL_LANGUAGE (decl, lang_c);
3569 /* Runtime library routines are, by definition, available in an
3570 external shared object. */
3571 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3572 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3574 DECL_CONTEXT (decl) = context;
3577 pushdecl_top_level (decl);
3581 /* A function in the user's namespace should have an explicit
3582 declaration before it is used. Mark the built-in function as
3583 anticipated but not actually declared. */
3584 if (name[0] != '_' || name[1] != '_')
3585 DECL_ANTICIPATED (decl) = 1;
3586 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3588 size_t len = strlen (name);
3590 /* Treat __*_chk fortification functions as anticipated as well,
3591 unless they are __builtin_*. */
3592 if (len > strlen ("___chk")
3593 && memcmp (name + len - strlen ("_chk"),
3594 "_chk", strlen ("_chk") + 1) == 0)
3595 DECL_ANTICIPATED (decl) = 1;
3602 cxx_builtin_function (tree decl)
3604 tree id = DECL_NAME (decl);
3605 const char *name = IDENTIFIER_POINTER (id);
3606 /* All builtins that don't begin with an '_' should additionally
3607 go in the 'std' namespace. */
3610 tree decl2 = copy_node(decl);
3611 push_namespace (std_identifier);
3612 builtin_function_1 (decl2, std_node, false);
3616 return builtin_function_1 (decl, NULL_TREE, false);
3619 /* Like cxx_builtin_function, but guarantee the function is added to the global
3620 scope. This is to allow function specific options to add new machine
3621 dependent builtins when the target ISA changes via attribute((target(...)))
3622 which saves space on program startup if the program does not use non-generic
3626 cxx_builtin_function_ext_scope (tree decl)
3629 tree id = DECL_NAME (decl);
3630 const char *name = IDENTIFIER_POINTER (id);
3631 /* All builtins that don't begin with an '_' should additionally
3632 go in the 'std' namespace. */
3635 tree decl2 = copy_node(decl);
3636 push_namespace (std_identifier);
3637 builtin_function_1 (decl2, std_node, true);
3641 return builtin_function_1 (decl, NULL_TREE, true);
3644 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3645 function. Not called directly. */
3648 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3650 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3651 DECL_EXTERNAL (fn) = 1;
3652 TREE_PUBLIC (fn) = 1;
3653 DECL_ARTIFICIAL (fn) = 1;
3654 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3655 SET_DECL_LANGUAGE (fn, lang_c);
3656 /* Runtime library routines are, by definition, available in an
3657 external shared object. */
3658 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3659 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3663 /* Returns the _DECL for a library function with C linkage.
3664 We assume that such functions never throw; if this is incorrect,
3665 callers should unset TREE_NOTHROW. */
3668 build_library_fn (tree name, tree type)
3670 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3671 TREE_NOTHROW (fn) = 1;
3675 /* Returns the _DECL for a library function with C++ linkage. */
3678 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3680 tree fn = build_library_fn_1 (name, operator_code, type);
3681 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3682 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3683 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3687 /* Like build_library_fn, but takes a C string instead of an
3691 build_library_fn_ptr (const char* name, tree type)
3693 return build_library_fn (get_identifier (name), type);
3696 /* Like build_cp_library_fn, but takes a C string instead of an
3700 build_cp_library_fn_ptr (const char* name, tree type)
3702 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3705 /* Like build_library_fn, but also pushes the function so that we will
3706 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3707 may throw exceptions listed in RAISES. */
3710 push_library_fn (tree name, tree type, tree raises)
3715 type = build_exception_variant (type, raises);
3717 fn = build_library_fn (name, type);
3718 pushdecl_top_level (fn);
3722 /* Like build_cp_library_fn, but also pushes the function so that it
3723 will be found by normal lookup. */
3726 push_cp_library_fn (enum tree_code operator_code, tree type)
3728 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3735 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3739 push_void_library_fn (tree name, tree parmtypes)
3741 tree type = build_function_type (void_type_node, parmtypes);
3742 return push_library_fn (name, type, NULL_TREE);
3745 /* Like push_library_fn, but also note that this function throws
3746 and does not return. Used for __throw_foo and the like. */
3749 push_throw_library_fn (tree name, tree type)
3751 tree fn = push_library_fn (name, type, NULL_TREE);
3752 TREE_THIS_VOLATILE (fn) = 1;
3753 TREE_NOTHROW (fn) = 0;
3757 /* When we call finish_struct for an anonymous union, we create
3758 default copy constructors and such. But, an anonymous union
3759 shouldn't have such things; this function undoes the damage to the
3760 anonymous union type T.
3762 (The reason that we create the synthesized methods is that we don't
3763 distinguish `union { int i; }' from `typedef union { int i; } U'.
3764 The first is an anonymous union; the second is just an ordinary
3768 fixup_anonymous_aggr (tree t)
3772 /* Wipe out memory of synthesized methods. */
3773 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3774 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3775 TYPE_HAS_INIT_REF (t) = 0;
3776 TYPE_HAS_CONST_INIT_REF (t) = 0;
3777 TYPE_HAS_ASSIGN_REF (t) = 0;
3778 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3780 /* Splice the implicitly generated functions out of the TYPE_METHODS
3782 q = &TYPE_METHODS (t);
3785 if (DECL_ARTIFICIAL (*q))
3786 *q = TREE_CHAIN (*q);
3788 q = &TREE_CHAIN (*q);
3791 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3792 if (TYPE_METHODS (t))
3794 tree decl = TYPE_MAIN_DECL (t);
3796 if (TREE_CODE (t) != UNION_TYPE)
3797 error ("%Jan anonymous struct cannot have function members", decl);
3799 error ("%Jan anonymous union cannot have function members", decl);
3802 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3803 assignment operators (because they cannot have these methods themselves).
3804 For anonymous unions this is already checked because they are not allowed
3805 in any union, otherwise we have to check it. */
3806 if (TREE_CODE (t) != UNION_TYPE)
3810 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3811 if (TREE_CODE (field) == FIELD_DECL)
3813 type = TREE_TYPE (field);
3814 if (CLASS_TYPE_P (type))
3816 if (TYPE_NEEDS_CONSTRUCTING (type))
3817 error ("member %q+#D with constructor not allowed "
3818 "in anonymous aggregate", field);
3819 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3820 error ("member %q+#D with destructor not allowed "
3821 "in anonymous aggregate", field);
3822 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3823 error ("member %q+#D with copy assignment operator "
3824 "not allowed in anonymous aggregate", field);
3830 /* Make sure that a declaration with no declarator is well-formed, i.e.
3831 just declares a tagged type or anonymous union.
3833 Returns the type declared; or NULL_TREE if none. */
3836 check_tag_decl (cp_decl_specifier_seq *declspecs)
3838 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3839 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3840 /* If a class, struct, or enum type is declared by the DECLSPECS
3841 (i.e, if a class-specifier, enum-specifier, or non-typename
3842 elaborated-type-specifier appears in the DECLSPECS),
3843 DECLARED_TYPE is set to the corresponding type. */
3844 tree declared_type = NULL_TREE;
3845 bool error_p = false;
3847 if (declspecs->multiple_types_p)
3848 error ("multiple types in one declaration");
3849 else if (declspecs->redefined_builtin_type)
3851 if (!in_system_header)
3852 permerror (input_location, "redeclaration of C++ built-in type %qT",
3853 declspecs->redefined_builtin_type);
3858 && TYPE_P (declspecs->type)
3859 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3860 && MAYBE_CLASS_TYPE_P (declspecs->type))
3861 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3862 declared_type = declspecs->type;
3863 else if (declspecs->type == error_mark_node)
3865 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3866 permerror (input_location, "declaration does not declare anything");
3867 /* Check for an anonymous union. */
3868 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3869 && TYPE_ANONYMOUS_P (declared_type))
3871 /* 7/3 In a simple-declaration, the optional init-declarator-list
3872 can be omitted only when declaring a class (clause 9) or
3873 enumeration (7.2), that is, when the decl-specifier-seq contains
3874 either a class-specifier, an elaborated-type-specifier with
3875 a class-key (9.1), or an enum-specifier. In these cases and
3876 whenever a class-specifier or enum-specifier is present in the
3877 decl-specifier-seq, the identifiers in these specifiers are among
3878 the names being declared by the declaration (as class-name,
3879 enum-names, or enumerators, depending on the syntax). In such
3880 cases, and except for the declaration of an unnamed bit-field (9.6),
3881 the decl-specifier-seq shall introduce one or more names into the
3882 program, or shall redeclare a name introduced by a previous
3883 declaration. [Example:
3884 enum { }; // ill-formed
3885 typedef class { }; // ill-formed
3889 error ("missing type-name in typedef-declaration");
3892 /* Anonymous unions are objects, so they can have specifiers. */;
3893 SET_ANON_AGGR_TYPE_P (declared_type);
3895 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3896 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3901 if (declspecs->specs[(int)ds_inline]
3902 || declspecs->specs[(int)ds_virtual])
3903 error ("%qs can only be specified for functions",
3904 declspecs->specs[(int)ds_inline]
3905 ? "inline" : "virtual");
3907 && (!current_class_type
3908 || current_scope () != current_class_type))
3909 error ("%<friend%> can only be specified inside a class");
3910 else if (declspecs->specs[(int)ds_explicit])
3911 error ("%<explicit%> can only be specified for constructors");
3912 else if (declspecs->storage_class)
3913 error ("a storage class can only be specified for objects "
3915 else if (declspecs->specs[(int)ds_const]
3916 || declspecs->specs[(int)ds_volatile]
3917 || declspecs->specs[(int)ds_restrict]
3918 || declspecs->specs[(int)ds_thread])
3919 error ("qualifiers can only be specified for objects "
3921 else if (saw_typedef)
3922 warning (0, "%<typedef%> was ignored in this declaration");
3925 return declared_type;
3928 /* Called when a declaration is seen that contains no names to declare.
3929 If its type is a reference to a structure, union or enum inherited
3930 from a containing scope, shadow that tag name for the current scope
3931 with a forward reference.
3932 If its type defines a new named structure or union
3933 or defines an enum, it is valid but we need not do anything here.
3934 Otherwise, it is an error.
3936 C++: may have to grok the declspecs to learn about static,
3937 complain for anonymous unions.
3939 Returns the TYPE declared -- or NULL_TREE if none. */
3942 shadow_tag (cp_decl_specifier_seq *declspecs)
3944 tree t = check_tag_decl (declspecs);
3949 if (declspecs->attributes)
3951 warning (0, "attribute ignored in declaration of %q+#T", t);
3952 warning (0, "attribute for %q+#T must follow the %qs keyword",
3953 t, class_key_or_enum_as_string (t));
3957 if (maybe_process_partial_specialization (t) == error_mark_node)
3960 /* This is where the variables in an anonymous union are
3961 declared. An anonymous union declaration looks like:
3963 because there is no declarator after the union, the parser
3964 sends that declaration here. */
3965 if (ANON_AGGR_TYPE_P (t))
3967 fixup_anonymous_aggr (t);
3969 if (TYPE_FIELDS (t))
3971 tree decl = grokdeclarator (/*declarator=*/NULL,
3972 declspecs, NORMAL, 0, NULL);
3973 finish_anon_union (decl);
3980 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3983 groktypename (cp_decl_specifier_seq *type_specifiers,
3984 const cp_declarator *declarator,
3985 bool is_template_arg)
3989 enum decl_context context
3990 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3991 attrs = type_specifiers->attributes;
3992 type_specifiers->attributes = NULL_TREE;
3993 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3994 if (attrs && type != error_mark_node)
3996 if (CLASS_TYPE_P (type))
3997 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3998 "outside of definition", type);
3999 else if (MAYBE_CLASS_TYPE_P (type))
4000 /* A template type parameter or other dependent type. */
4001 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4002 "type %qT without an associated declaration", type);
4004 cplus_decl_attributes (&type, attrs, 0);
4009 /* Process a DECLARATOR for a function-scope variable declaration,
4010 namespace-scope variable declaration, or function declaration.
4011 (Function definitions go through start_function; class member
4012 declarations appearing in the body of the class go through
4013 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4014 If an error occurs, the error_mark_node is returned instead.
4016 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4017 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4018 for an explicitly defaulted function, or SD_DELETED for an explicitly
4019 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4020 implicitly initialized via a default constructor. ATTRIBUTES and
4021 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4022 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4023 set, the caller is responsible for calling pop_scope. */
4026 start_decl (const cp_declarator *declarator,
4027 cp_decl_specifier_seq *declspecs,
4030 tree prefix_attributes,
4031 tree *pushed_scope_p)
4039 *pushed_scope_p = NULL_TREE;
4041 /* An object declared as __attribute__((deprecated)) suppresses
4042 warnings of uses of other deprecated items. */
4043 if (lookup_attribute ("deprecated", attributes))
4044 deprecated_state = DEPRECATED_SUPPRESS;
4046 attributes = chainon (attributes, prefix_attributes);
4048 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4051 deprecated_state = DEPRECATED_NORMAL;
4053 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4054 || decl == error_mark_node)
4055 return error_mark_node;
4057 type = TREE_TYPE (decl);
4059 context = DECL_CONTEXT (decl);
4063 *pushed_scope_p = push_scope (context);
4065 /* We are only interested in class contexts, later. */
4066 if (TREE_CODE (context) == NAMESPACE_DECL)
4067 context = NULL_TREE;
4071 /* Is it valid for this decl to have an initializer at all?
4072 If not, set INITIALIZED to zero, which will indirectly
4073 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4074 switch (TREE_CODE (decl))
4077 error ("typedef %qD is initialized (use decltype instead)", decl);
4078 return error_mark_node;
4081 if (initialized == SD_DELETED)
4082 /* We'll handle the rest of the semantics later, but we need to
4083 set this now so it's visible to duplicate_decls. */
4084 DECL_DELETED_FN (decl) = 1;
4093 if (! toplevel_bindings_p ()
4094 && DECL_EXTERNAL (decl))
4095 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4097 DECL_EXTERNAL (decl) = 0;
4098 if (toplevel_bindings_p ())
4099 TREE_STATIC (decl) = 1;
4102 /* If this is a typedef that names the class for linkage purposes
4103 (7.1.3p8), apply any attributes directly to the type. */
4104 if (TREE_CODE (decl) == TYPE_DECL
4105 && TAGGED_TYPE_P (TREE_TYPE (decl))
4106 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4107 flags = ATTR_FLAG_TYPE_IN_PLACE;
4111 /* Set attributes here so if duplicate decl, will have proper attributes. */
4112 cplus_decl_attributes (&decl, attributes, flags);
4114 /* Dllimported symbols cannot be defined. Static data members (which
4115 can be initialized in-class and dllimported) go through grokfield,
4116 not here, so we don't need to exclude those decls when checking for
4118 if (initialized && DECL_DLLIMPORT_P (decl))
4120 error ("definition of %q#D is marked %<dllimport%>", decl);
4121 DECL_DLLIMPORT_P (decl) = 0;
4124 /* If #pragma weak was used, mark the decl weak now. */
4125 maybe_apply_pragma_weak (decl);
4127 if (TREE_CODE (decl) == FUNCTION_DECL
4128 && DECL_DECLARED_INLINE_P (decl)
4129 && DECL_UNINLINABLE (decl)
4130 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4131 warning (0, "inline function %q+D given attribute noinline", decl);
4133 if (context && COMPLETE_TYPE_P (complete_type (context)))
4135 if (TREE_CODE (decl) == VAR_DECL)
4137 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4138 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4139 error ("%q#D is not a static member of %q#T", decl, context);
4142 if (DECL_CONTEXT (field) != context)
4144 if (!same_type_p (DECL_CONTEXT (field), context))
4145 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4146 "to be defined as %<%T::%D%>",
4147 DECL_CONTEXT (field), DECL_NAME (decl),
4148 context, DECL_NAME (decl));
4149 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4151 if (processing_specialization
4152 && template_class_depth (context) == 0
4153 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4154 error ("template header not allowed in member definition "
4155 "of explicitly specialized class");
4156 /* Static data member are tricky; an in-class initialization
4157 still doesn't provide a definition, so the in-class
4158 declaration will have DECL_EXTERNAL set, but will have an
4159 initialization. Thus, duplicate_decls won't warn
4160 about this situation, and so we check here. */
4161 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4162 error ("duplicate initialization of %qD", decl);
4163 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4169 tree field = check_classfn (context, decl,
4170 (processing_template_decl
4171 > template_class_depth (context))
4172 ? current_template_parms
4174 if (field && field != error_mark_node
4175 && duplicate_decls (decl, field,
4176 /*newdecl_is_friend=*/false))
4180 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4181 DECL_IN_AGGR_P (decl) = 0;
4182 /* Do not mark DECL as an explicit specialization if it was not
4183 already marked as an instantiation; a declaration should
4184 never be marked as a specialization unless we know what
4185 template is being specialized. */
4186 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4188 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4190 /* [temp.expl.spec] An explicit specialization of a static data
4191 member of a template is a definition if the declaration
4192 includes an initializer; otherwise, it is a declaration.
4194 We check for processing_specialization so this only applies
4195 to the new specialization syntax. */
4196 if (!initialized && processing_specialization)
4197 DECL_EXTERNAL (decl) = 1;
4200 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4201 permerror (input_location, "declaration of %q#D outside of class is not definition",
4205 was_public = TREE_PUBLIC (decl);
4207 /* Enter this declaration into the symbol table. */
4208 decl = maybe_push_decl (decl);
4210 if (processing_template_decl)
4211 decl = push_template_decl (decl);
4212 if (decl == error_mark_node)
4213 return error_mark_node;
4215 /* Tell the back end to use or not use .common as appropriate. If we say
4216 -fconserve-space, we want this to save .data space, at the expense of
4217 wrong semantics. If we say -fno-conserve-space, we want this to
4218 produce errors about redefs; to do this we force variables into the
4220 if (flag_conserve_space
4221 && TREE_CODE (decl) == VAR_DECL
4222 && TREE_PUBLIC (decl)
4223 && !DECL_THREAD_LOCAL_P (decl)
4224 && !have_global_bss_p ())
4225 DECL_COMMON (decl) = 1;
4227 if (TREE_CODE (decl) == VAR_DECL
4228 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4229 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4231 /* This is a const variable with implicit 'static'. Set
4232 DECL_THIS_STATIC so we can tell it from variables that are
4233 !TREE_PUBLIC because of the anonymous namespace. */
4234 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4235 DECL_THIS_STATIC (decl) = 1;
4238 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4239 start_decl_1 (decl, initialized);
4244 /* Process the declaration of a variable DECL. INITIALIZED is true
4245 iff DECL is explicitly initialized. (INITIALIZED is false if the
4246 variable is initialized via an implicitly-called constructor.)
4247 This function must be called for ordinary variables (including, for
4248 example, implicit instantiations of templates), but must not be
4249 called for template declarations. */
4252 start_decl_1 (tree decl, bool initialized)
4256 bool aggregate_definition_p;
4258 gcc_assert (!processing_template_decl);
4260 if (error_operand_p (decl))
4263 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4265 type = TREE_TYPE (decl);
4266 complete_p = COMPLETE_TYPE_P (type);
4267 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4269 /* If an explicit initializer is present, or if this is a definition
4270 of an aggregate, then we need a complete type at this point.
4271 (Scalars are always complete types, so there is nothing to
4272 check.) This code just sets COMPLETE_P; errors (if necessary)
4273 are issued below. */
4274 if ((initialized || aggregate_definition_p)
4276 && COMPLETE_TYPE_P (complete_type (type)))
4279 /* We will not yet have set TREE_READONLY on DECL if the type
4280 was "const", but incomplete, before this point. But, now, we
4281 have a complete type, so we can try again. */
4282 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4286 /* Is it valid for this decl to have an initializer at all? */
4288 /* Don't allow initializations for incomplete types except for
4289 arrays which might be completed by the initialization. */
4291 ; /* A complete type is ok. */
4292 else if (type_uses_auto (type))
4293 ; /* An auto type is ok. */
4294 else if (TREE_CODE (type) != ARRAY_TYPE)
4296 error ("variable %q#D has initializer but incomplete type", decl);
4297 type = TREE_TYPE (decl) = error_mark_node;
4299 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4301 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4302 error ("elements of array %q#D have incomplete type", decl);
4303 /* else we already gave an error in start_decl. */
4306 else if (aggregate_definition_p && !complete_p)
4308 if (type_uses_auto (type))
4309 error ("declaration of %q#D has no initializer", decl);
4311 error ("aggregate %q#D has incomplete type and cannot be defined",
4313 /* Change the type so that assemble_variable will give
4314 DECL an rtl we can live with: (mem (const_int 0)). */
4315 type = TREE_TYPE (decl) = error_mark_node;
4318 /* Create a new scope to hold this declaration if necessary.
4319 Whether or not a new scope is necessary cannot be determined
4320 until after the type has been completed; if the type is a
4321 specialization of a class template it is not until after
4322 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4323 will be set correctly. */
4324 maybe_push_cleanup_level (type);
4327 /* Handle initialization of references. DECL, TYPE, and INIT have the
4328 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4329 but will be set to a new CLEANUP_STMT if a temporary is created
4330 that must be destroyed subsequently.
4332 Returns an initializer expression to use to initialize DECL, or
4333 NULL if the initialization can be performed statically.
4335 Quotes on semantics can be found in ARM 8.4.3. */
4338 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4342 if (init == NULL_TREE)
4344 if ((DECL_LANG_SPECIFIC (decl) == 0
4345 || DECL_IN_AGGR_P (decl) == 0)
4346 && ! DECL_THIS_EXTERN (decl))
4347 error ("%qD declared as reference but not initialized", decl);
4351 if (TREE_CODE (init) == CONSTRUCTOR)
4353 error ("ISO C++ forbids use of initializer list to "
4354 "initialize reference %qD", decl);
4358 if (TREE_CODE (init) == TREE_LIST)
4359 init = build_x_compound_expr_from_list (init, "initializer");
4361 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4362 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4363 /* Note: default conversion is only called in very special cases. */
4364 init = decay_conversion (init);
4366 /* Convert INIT to the reference type TYPE. This may involve the
4367 creation of a temporary, whose lifetime must be the same as that
4368 of the reference. If so, a DECL_EXPR for the temporary will be
4369 added just after the DECL_EXPR for DECL. That's why we don't set
4370 DECL_INITIAL for local references (instead assigning to them
4371 explicitly); we need to allow the temporary to be initialized
4373 tmp = initialize_reference (type, init, decl, cleanup);
4375 if (tmp == error_mark_node)
4377 else if (tmp == NULL_TREE)
4379 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4383 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4386 DECL_INITIAL (decl) = tmp;
4391 /* Subroutine of check_initializer. We're initializing a DECL of
4392 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4393 extend the lifetime of the underlying array to match that of the decl,
4394 just like for reference initialization. CLEANUP is as for
4395 grok_reference_init. */
4398 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4400 tree aggr_init, array, arrtype;
4401 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4402 aggr_init = TARGET_EXPR_INITIAL (init);
4403 init = build2 (INIT_EXPR, type, decl, init);
4405 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4406 arrtype = TREE_TYPE (array);
4408 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4409 array = TREE_OPERAND (array, 0);
4410 /* If the array is constant, finish_compound_literal already made it a
4411 static variable and we don't need to do anything here. */
4412 if (decl && TREE_CODE (array) == TARGET_EXPR)
4415 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4416 var = build_address (var);
4417 var = convert (arrtype, var);
4418 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4419 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4424 /* Designated initializers in arrays are not supported in GNU C++.
4425 The parser cannot detect this error since it does not know whether
4426 a given brace-enclosed initializer is for a class type or for an
4427 array. This function checks that CE does not use a designated
4428 initializer. If it does, an error is issued. Returns true if CE
4429 is valid, i.e., does not have a designated initializer. */
4432 check_array_designated_initializer (const constructor_elt *ce)
4434 /* Designated initializers for array elements are not supported. */
4437 /* The parser only allows identifiers as designated
4439 if (ce->index == error_mark_node)
4440 error ("name used in a GNU-style designated "
4441 "initializer for an array");
4444 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4445 error ("name %qD used in a GNU-style designated "
4446 "initializer for an array", ce->index);
4454 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4455 array until we finish parsing the initializer. If that's the
4456 situation we're in, update DECL accordingly. */
4459 maybe_deduce_size_from_array_init (tree decl, tree init)
4461 tree type = TREE_TYPE (decl);
4463 if (TREE_CODE (type) == ARRAY_TYPE
4464 && TYPE_DOMAIN (type) == NULL_TREE
4465 && TREE_CODE (decl) != TYPE_DECL)
4467 /* do_default is really a C-ism to deal with tentative definitions.
4468 But let's leave it here to ease the eventual merge. */
4469 int do_default = !DECL_EXTERNAL (decl);
4470 tree initializer = init ? init : DECL_INITIAL (decl);
4473 /* Check that there are no designated initializers in INIT, as
4474 those are not supported in GNU C++, and as the middle-end
4475 will crash if presented with a non-numeric designated
4477 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4479 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4480 constructor_elt *ce;
4483 VEC_iterate (constructor_elt, v, i, ce);
4485 if (!check_array_designated_initializer (ce))
4491 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4495 error ("initializer fails to determine size of %qD", decl);
4496 TREE_TYPE (decl) = error_mark_node;
4498 else if (failure == 2)
4502 error ("array size missing in %qD", decl);
4503 TREE_TYPE (decl) = error_mark_node;
4505 /* If a `static' var's size isn't known, make it extern as
4506 well as static, so it does not get allocated. If it's not
4507 `static', then don't mark it extern; finish_incomplete_decl
4508 will give it a default size and it will get allocated. */
4509 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4510 DECL_EXTERNAL (decl) = 1;
4512 else if (failure == 3)
4514 error ("zero-size array %qD", decl);
4515 TREE_TYPE (decl) = error_mark_node;
4519 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4521 relayout_decl (decl);
4525 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4526 any appropriate error messages regarding the layout. */
4529 layout_var_decl (tree decl)
4533 type = TREE_TYPE (decl);
4534 if (type == error_mark_node)
4537 /* If we haven't already layed out this declaration, do so now.
4538 Note that we must not call complete type for an external object
4539 because it's type might involve templates that we are not
4540 supposed to instantiate yet. (And it's perfectly valid to say
4541 `extern X x' for some incomplete type `X'.) */
4542 if (!DECL_EXTERNAL (decl))
4543 complete_type (type);
4544 if (!DECL_SIZE (decl)
4545 && TREE_TYPE (decl) != error_mark_node
4546 && (COMPLETE_TYPE_P (type)
4547 || (TREE_CODE (type) == ARRAY_TYPE
4548 && !TYPE_DOMAIN (type)
4549 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4550 layout_decl (decl, 0);
4552 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4554 /* An automatic variable with an incomplete type: that is an error.
4555 Don't talk about array types here, since we took care of that
4556 message in grokdeclarator. */
4557 error ("storage size of %qD isn't known", decl);
4558 TREE_TYPE (decl) = error_mark_node;
4561 /* Keep this code around in case we later want to control debug info
4562 based on whether a type is "used". (jason 1999-11-11) */
4564 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4565 /* Let debugger know it should output info for this type. */
4566 note_debug_info_needed (ttype);
4568 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4569 note_debug_info_needed (DECL_CONTEXT (decl));
4572 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4573 && DECL_SIZE (decl) != NULL_TREE
4574 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4576 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4577 constant_expression_warning (DECL_SIZE (decl));
4580 error ("storage size of %qD isn't constant", decl);
4581 TREE_TYPE (decl) = error_mark_node;
4586 /* If a local static variable is declared in an inline function, or if
4587 we have a weak definition, we must endeavor to create only one
4588 instance of the variable at link-time. */
4591 maybe_commonize_var (tree decl)
4593 /* Static data in a function with comdat linkage also has comdat
4595 if (TREE_STATIC (decl)
4596 /* Don't mess with __FUNCTION__. */
4597 && ! DECL_ARTIFICIAL (decl)
4598 && DECL_FUNCTION_SCOPE_P (decl)
4599 /* Unfortunately, import_export_decl has not always been called
4600 before the function is processed, so we cannot simply check
4602 && (DECL_COMDAT (DECL_CONTEXT (decl))
4603 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4604 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4605 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4609 /* With weak symbols, we simply make the variable COMDAT;
4610 that will cause copies in multiple translations units to
4612 comdat_linkage (decl);
4616 if (DECL_INITIAL (decl) == NULL_TREE
4617 || DECL_INITIAL (decl) == error_mark_node)
4619 /* Without weak symbols, we can use COMMON to merge
4620 uninitialized variables. */
4621 TREE_PUBLIC (decl) = 1;
4622 DECL_COMMON (decl) = 1;
4626 /* While for initialized variables, we must use internal
4627 linkage -- which means that multiple copies will not
4629 TREE_PUBLIC (decl) = 0;
4630 DECL_COMMON (decl) = 0;
4631 warning (0, "sorry: semantics of inline function static "
4632 "data %q+#D are wrong (you'll wind up "
4633 "with multiple copies)", decl);
4634 warning (0, "%J you can work around this by removing "
4640 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4641 /* Set it up again; we might have set DECL_INITIAL since the last
4643 comdat_linkage (decl);
4646 /* Issue an error message if DECL is an uninitialized const variable. */
4649 check_for_uninitialized_const_var (tree decl)
4651 tree type = TREE_TYPE (decl);
4653 /* ``Unless explicitly declared extern, a const object does not have
4654 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4656 if (TREE_CODE (decl) == VAR_DECL
4657 && TREE_CODE (type) != REFERENCE_TYPE
4658 && CP_TYPE_CONST_P (type)
4659 && !TYPE_NEEDS_CONSTRUCTING (type)
4660 && !DECL_INITIAL (decl))
4661 error ("uninitialized const %qD", decl);
4665 /* Structure holding the current initializer being processed by reshape_init.
4666 CUR is a pointer to the current element being processed, END is a pointer
4667 after the last element present in the initializer. */
4668 typedef struct reshape_iterator_t
4670 constructor_elt *cur;
4671 constructor_elt *end;
4674 static tree reshape_init_r (tree, reshape_iter *, bool);
4676 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4677 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4678 initialized. If there are no more such fields, the return value
4682 next_initializable_field (tree field)
4685 && (TREE_CODE (field) != FIELD_DECL
4686 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4687 || DECL_ARTIFICIAL (field)))
4688 field = TREE_CHAIN (field);
4693 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4694 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4695 INTEGER_CST representing the size of the array minus one (the maximum index),
4696 or NULL_TREE if the array was declared without specifying the size. D is
4697 the iterator within the constructor. */
4700 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4703 bool sized_array_p = (max_index != NULL_TREE);
4704 unsigned HOST_WIDE_INT max_index_cst = 0;
4705 unsigned HOST_WIDE_INT index;
4707 /* The initializer for an array is always a CONSTRUCTOR. */
4708 new_init = build_constructor (init_list_type_node, NULL);
4712 /* Minus 1 is used for zero sized arrays. */
4713 if (integer_all_onesp (max_index))
4716 if (host_integerp (max_index, 1))
4717 max_index_cst = tree_low_cst (max_index, 1);
4718 /* sizetype is sign extended, not zero extended. */
4720 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4724 /* Loop until there are no more initializers. */
4726 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4731 check_array_designated_initializer (d->cur);
4732 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4733 if (elt_init == error_mark_node)
4734 return error_mark_node;
4735 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4741 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4742 Parameters are the same of reshape_init_r. */
4745 reshape_init_array (tree type, reshape_iter *d)
4747 tree max_index = NULL_TREE;
4749 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4751 if (TYPE_DOMAIN (type))
4752 max_index = array_type_nelts (type);
4754 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4757 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4758 Parameters are the same of reshape_init_r. */
4761 reshape_init_vector (tree type, reshape_iter *d)
4763 tree max_index = NULL_TREE;
4766 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4768 if (COMPOUND_LITERAL_P (d->cur->value))
4770 tree value = d->cur->value;
4771 if (!same_type_p (TREE_TYPE (value), type))
4773 error ("invalid type %qT as initializer for a vector of type %qT",
4774 TREE_TYPE (d->cur->value), type);
4775 value = error_mark_node;
4781 /* For a vector, the representation type is a struct
4782 containing a single member which is an array of the
4783 appropriate size. */
4784 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4785 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4786 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4788 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4791 /* Subroutine of reshape_init_r, processes the initializers for classes
4792 or union. Parameters are the same of reshape_init_r. */
4795 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4800 gcc_assert (CLASS_TYPE_P (type));
4802 /* The initializer for a class is always a CONSTRUCTOR. */
4803 new_init = build_constructor (init_list_type_node, NULL);
4804 field = next_initializable_field (TYPE_FIELDS (type));
4810 An initializer for an aggregate member that is an
4811 empty class shall have the form of an empty
4812 initializer-list {}. */
4813 if (!first_initializer_p)
4815 error ("initializer for %qT must be brace-enclosed", type);
4816 return error_mark_node;
4821 /* Loop through the initializable fields, gathering initializers. */
4822 while (d->cur != d->end)
4826 /* Handle designated initializers, as an extension. */
4829 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4831 if (!field || TREE_CODE (field) != FIELD_DECL)
4833 error ("%qT has no non-static data member named %qD", type,
4835 return error_mark_node;
4839 /* If we processed all the member of the class, we are done. */
4843 field_init = reshape_init_r (TREE_TYPE (field), d,
4844 /*first_initializer_p=*/false);
4845 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4849 When a union is initialized with a brace-enclosed
4850 initializer, the braces shall only contain an
4851 initializer for the first member of the union. */
4852 if (TREE_CODE (type) == UNION_TYPE)
4855 field = next_initializable_field (TREE_CHAIN (field));
4861 /* Subroutine of reshape_init, which processes a single initializer (part of
4862 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4863 iterator within the CONSTRUCTOR which points to the initializer to process.
4864 FIRST_INITIALIZER_P is true if this is the first initializer of the
4865 CONSTRUCTOR node. */
4868 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4870 tree init = d->cur->value;
4872 if (error_operand_p (init))
4873 return error_mark_node;
4875 /* A non-aggregate type is always initialized with a single
4877 if (!CP_AGGREGATE_TYPE_P (type))
4879 /* It is invalid to initialize a non-aggregate type with a
4880 brace-enclosed initializer before C++0x.
4881 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4882 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4883 a CONSTRUCTOR (with a record type). */
4884 if (TREE_CODE (init) == CONSTRUCTOR
4885 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4887 if (SCALAR_TYPE_P (type))
4889 error ("braces around scalar initializer for type %qT", type);
4890 init = error_mark_node;
4893 maybe_warn_cpp0x ("extended initializer lists");
4902 All implicit type conversions (clause _conv_) are considered when
4903 initializing the aggregate member with an initializer from an
4904 initializer-list. If the initializer can initialize a member,
4905 the member is initialized. Otherwise, if the member is itself a
4906 non-empty subaggregate, brace elision is assumed and the
4907 initializer is considered for the initialization of the first
4908 member of the subaggregate. */
4909 if (TREE_CODE (init) != CONSTRUCTOR
4910 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4916 /* [dcl.init.string]
4918 A char array (whether plain char, signed char, or unsigned char)
4919 can be initialized by a string-literal (optionally enclosed in
4920 braces); a wchar_t array can be initialized by a wide
4921 string-literal (optionally enclosed in braces). */
4922 if (TREE_CODE (type) == ARRAY_TYPE
4923 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4925 tree str_init = init;
4927 /* Strip one level of braces if and only if they enclose a single
4928 element (as allowed by [dcl.init.string]). */
4929 if (!first_initializer_p
4930 && TREE_CODE (str_init) == CONSTRUCTOR
4931 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4933 str_init = VEC_index (constructor_elt,
4934 CONSTRUCTOR_ELTS (str_init), 0)->value;
4937 /* If it's a string literal, then it's the initializer for the array
4938 as a whole. Otherwise, continue with normal initialization for
4939 array types (one value per array element). */
4940 if (TREE_CODE (str_init) == STRING_CST)
4947 /* The following cases are about aggregates. If we are not within a full
4948 initializer already, and there is not a CONSTRUCTOR, it means that there
4949 is a missing set of braces (that is, we are processing the case for
4950 which reshape_init exists). */
4951 if (!first_initializer_p)
4953 if (TREE_CODE (init) == CONSTRUCTOR)
4955 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4956 /* There is no need to reshape pointer-to-member function
4957 initializers, as they are always constructed correctly
4958 by the front end. */
4960 else if (COMPOUND_LITERAL_P (init))
4961 /* For a nested compound literal, there is no need to reshape since
4962 brace elision is not allowed. Even if we decided to allow it,
4963 we should add a call to reshape_init in finish_compound_literal,
4964 before calling digest_init, so changing this code would still
4965 not be necessary. */
4966 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4970 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4971 return reshape_init (type, init);
4975 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4979 /* Dispatch to specialized routines. */
4980 if (CLASS_TYPE_P (type))
4981 return reshape_init_class (type, d, first_initializer_p);
4982 else if (TREE_CODE (type) == ARRAY_TYPE)
4983 return reshape_init_array (type, d);
4984 else if (TREE_CODE (type) == VECTOR_TYPE)
4985 return reshape_init_vector (type, d);
4990 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4991 brace-enclosed aggregate initializer.
4993 INIT is the CONSTRUCTOR containing the list of initializers describing
4994 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4995 It may not presently match the shape of the TYPE; for example:
4997 struct S { int a; int b; };
4998 struct S a[] = { 1, 2, 3, 4 };
5000 Here INIT will hold a VEC of four elements, rather than a
5001 VEC of two elements, each itself a VEC of two elements. This
5002 routine transforms INIT from the former form into the latter. The
5003 revised CONSTRUCTOR node is returned. */
5006 reshape_init (tree type, tree init)
5008 VEC(constructor_elt, gc) *v;
5012 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5014 v = CONSTRUCTOR_ELTS (init);
5016 /* An empty constructor does not need reshaping, and it is always a valid
5018 if (VEC_empty (constructor_elt, v))
5021 /* Recurse on this CONSTRUCTOR. */
5022 d.cur = VEC_index (constructor_elt, v, 0);
5023 d.end = d.cur + VEC_length (constructor_elt, v);
5025 new_init = reshape_init_r (type, &d, true);
5026 if (new_init == error_mark_node)
5027 return error_mark_node;
5029 /* Make sure all the element of the constructor were used. Otherwise,
5030 issue an error about exceeding initializers. */
5032 error ("too many initializers for %qT", type);
5037 /* Verify array initializer. Returns true if errors have been reported. */
5040 check_array_initializer (tree decl, tree type, tree init)
5042 tree element_type = TREE_TYPE (type);
5044 /* The array type itself need not be complete, because the
5045 initializer may tell us how many elements are in the array.
5046 But, the elements of the array must be complete. */
5047 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5050 error ("elements of array %q#D have incomplete type", decl);
5052 error ("elements of array %q#T have incomplete type", type);
5055 /* It is not valid to initialize a VLA. */
5057 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5058 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5061 error ("variable-sized object %qD may not be initialized", decl);
5063 error ("variable-sized compound literal");
5069 /* Subroutine of check_initializer; args are passed down from that function.
5070 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5073 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5076 int saved_stmts_are_full_exprs_p = 0;
5077 if (building_stmt_tree ())
5079 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5080 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5082 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5083 if (building_stmt_tree ())
5084 current_stmt_tree ()->stmts_are_full_exprs_p =
5085 saved_stmts_are_full_exprs_p;
5089 /* Verify INIT (the initializer for DECL), and record the
5090 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5091 grok_reference_init.
5093 If the return value is non-NULL, it is an expression that must be
5094 evaluated dynamically to initialize DECL. */
5097 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5099 tree type = TREE_TYPE (decl);
5100 tree init_code = NULL;
5102 /* Things that are going to be initialized need to have complete
5104 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5106 if (type == error_mark_node)
5107 /* We will have already complained. */
5110 if (TREE_CODE (type) == ARRAY_TYPE)
5112 if (check_array_initializer (decl, type, init))
5115 else if (!COMPLETE_TYPE_P (type))
5117 error ("%qD has incomplete type", decl);
5118 TREE_TYPE (decl) = error_mark_node;
5122 /* There is no way to make a variable-sized class type in GNU C++. */
5123 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5125 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5127 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5128 if (SCALAR_TYPE_P (type))
5132 maybe_warn_cpp0x ("extended initializer lists");
5133 init = build_zero_init (type, NULL_TREE, false);
5135 else if (init_len != 1)
5137 error ("scalar object %qD requires one element in initializer",
5139 TREE_TYPE (decl) = error_mark_node;
5145 if (TREE_CODE (decl) == CONST_DECL)
5147 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5149 DECL_INITIAL (decl) = init;
5151 gcc_assert (init != NULL_TREE);
5154 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5155 init = grok_reference_init (decl, type, init, cleanup);
5158 /* Do not reshape constructors of vectors (they don't need to be
5160 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5162 if (is_std_init_list (type))
5163 return build_init_list_var_init (decl, type, init, cleanup);
5164 else if (TYPE_NON_AGGREGATE_CLASS (type))
5166 /* Don't reshape if the class has constructors. */
5167 if (cxx_dialect == cxx98)
5168 error ("in C++98 %qD must be initialized by constructor, "
5171 init = build_tree_list (NULL_TREE, init);
5173 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5175 error ("opaque vector types cannot be initialized");
5176 init = error_mark_node;
5179 init = reshape_init (type, init);
5182 /* If DECL has an array type without a specific bound, deduce the
5183 array size from the initializer. */
5184 maybe_deduce_size_from_array_init (decl, init);
5185 type = TREE_TYPE (decl);
5186 if (type == error_mark_node)
5189 if (TYPE_NEEDS_CONSTRUCTING (type)
5190 || (CLASS_TYPE_P (type)
5191 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5192 return build_aggr_init_full_exprs (decl, init, flags);
5193 else if (TREE_CODE (init) != TREE_VEC)
5195 init_code = store_init_value (decl, init, flags);
5196 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5197 && DECL_INITIAL (decl)
5198 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5199 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5200 warning (0, "array %qD initialized by parenthesized string literal %qE",
5201 decl, DECL_INITIAL (decl));
5205 else if (DECL_EXTERNAL (decl))
5207 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5208 return build_aggr_init_full_exprs (decl, init, flags);
5209 else if (MAYBE_CLASS_TYPE_P (type))
5211 tree core_type = strip_array_types (type);
5213 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5214 error ("structure %qD with uninitialized const members", decl);
5215 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5216 error ("structure %qD with uninitialized reference members", decl);
5218 check_for_uninitialized_const_var (decl);
5221 check_for_uninitialized_const_var (decl);
5223 if (init && init != error_mark_node)
5224 init_code = build2 (INIT_EXPR, type, decl, init);
5229 /* If DECL is not a local variable, give it RTL. */
5232 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5234 int toplev = toplevel_bindings_p ();
5236 const char *filename;
5238 /* Set the DECL_ASSEMBLER_NAME for the object. */
5241 /* The `register' keyword, when used together with an
5242 asm-specification, indicates that the variable should be
5243 placed in a particular register. */
5244 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5246 set_user_assembler_name (decl, asmspec);
5247 DECL_HARD_REGISTER (decl) = 1;
5251 if (TREE_CODE (decl) == FUNCTION_DECL
5252 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5253 set_builtin_user_assembler_name (decl, asmspec);
5254 set_user_assembler_name (decl, asmspec);
5258 /* Handle non-variables up front. */
5259 if (TREE_CODE (decl) != VAR_DECL)
5261 rest_of_decl_compilation (decl, toplev, at_eof);
5265 /* If we see a class member here, it should be a static data
5267 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5269 gcc_assert (TREE_STATIC (decl));
5270 /* An in-class declaration of a static data member should be
5271 external; it is only a declaration, and not a definition. */
5272 if (init == NULL_TREE)
5273 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5276 /* We don't create any RTL for local variables. */
5277 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5280 /* We defer emission of local statics until the corresponding
5281 DECL_EXPR is expanded. */
5282 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5284 /* We try to defer namespace-scope static constants so that they are
5285 not emitted into the object file unnecessarily. */
5286 filename = input_filename;
5287 if (!DECL_VIRTUAL_P (decl)
5288 && TREE_READONLY (decl)
5289 && DECL_INITIAL (decl) != NULL_TREE
5290 && DECL_INITIAL (decl) != error_mark_node
5292 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5294 && !TREE_PUBLIC (decl))
5296 /* Fool with the linkage of static consts according to #pragma
5298 struct c_fileinfo *finfo = get_fileinfo (filename);
5299 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5301 TREE_PUBLIC (decl) = 1;
5302 DECL_EXTERNAL (decl) = finfo->interface_only;
5307 /* Likewise for template instantiations. */
5308 else if (DECL_LANG_SPECIFIC (decl)
5309 && DECL_IMPLICIT_INSTANTIATION (decl))
5312 /* If we're not deferring, go ahead and assemble the variable. */
5314 rest_of_decl_compilation (decl, toplev, at_eof);
5317 /* walk_tree helper for wrap_temporary_cleanups, below. */
5320 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5322 if (TYPE_P (*stmt_p))
5328 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5330 tree guard = (tree)data;
5331 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5333 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5334 /* Tell honor_protect_cleanup_actions to handle this as a separate
5336 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5338 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5344 /* We're initializing a local variable which has a cleanup GUARD. If there
5345 are any temporaries used in the initializer INIT of this variable, we
5346 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5347 variable will be cleaned up properly if one of them throws.
5349 Unfortunately, there's no way to express this properly in terms of
5350 nesting, as the regions for the temporaries overlap the region for the
5351 variable itself; if there are two temporaries, the variable needs to be
5352 the first thing destroyed if either of them throws. However, we only
5353 want to run the variable's cleanup if it actually got constructed. So
5354 we need to guard the temporary cleanups with the variable's cleanup if
5355 they are run on the normal path, but not if they are run on the
5356 exceptional path. We implement this by telling
5357 honor_protect_cleanup_actions to strip the variable cleanup from the
5358 exceptional path. */
5361 wrap_temporary_cleanups (tree init, tree guard)
5363 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5366 /* Generate code to initialize DECL (a local variable). */
5369 initialize_local_var (tree decl, tree init)
5371 tree type = TREE_TYPE (decl);
5375 gcc_assert (TREE_CODE (decl) == VAR_DECL
5376 || TREE_CODE (decl) == RESULT_DECL);
5377 gcc_assert (!TREE_STATIC (decl));
5379 if (DECL_SIZE (decl) == NULL_TREE)
5381 /* If we used it already as memory, it must stay in memory. */
5382 DECL_INITIAL (decl) = NULL_TREE;
5383 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5387 if (type == error_mark_node)
5390 /* Compute and store the initial value. */
5391 already_used = TREE_USED (decl) || TREE_USED (type);
5393 /* Generate a cleanup, if necessary. */
5394 cleanup = cxx_maybe_build_cleanup (decl);
5396 /* Perform the initialization. */
5399 int saved_stmts_are_full_exprs_p;
5401 /* If we're only initializing a single object, guard the destructors
5402 of any temporaries used in its initializer with its destructor.
5403 This isn't right for arrays because each element initialization is
5404 a full-expression. */
5405 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5406 wrap_temporary_cleanups (init, cleanup);
5408 gcc_assert (building_stmt_tree ());
5409 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5410 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5411 finish_expr_stmt (init);
5412 current_stmt_tree ()->stmts_are_full_exprs_p =
5413 saved_stmts_are_full_exprs_p;
5416 /* Set this to 0 so we can tell whether an aggregate which was
5417 initialized was ever used. Don't do this if it has a
5418 destructor, so we don't complain about the 'resource
5419 allocation is initialization' idiom. Now set
5420 attribute((unused)) on types so decls of that type will be
5421 marked used. (see TREE_USED, above.) */
5422 if (TYPE_NEEDS_CONSTRUCTING (type)
5424 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5425 && DECL_NAME (decl))
5426 TREE_USED (decl) = 0;
5427 else if (already_used)
5428 TREE_USED (decl) = 1;
5431 finish_decl_cleanup (decl, cleanup);
5434 /* DECL is a VAR_DECL for a compiler-generated variable with static
5435 storage duration (like a virtual table) whose initializer is a
5436 compile-time constant. INIT must be either a TREE_LIST of values,
5437 or a CONSTRUCTOR. Initialize the variable and provide it to the
5441 initialize_artificial_var (tree decl, tree init)
5443 gcc_assert (DECL_ARTIFICIAL (decl));
5444 if (TREE_CODE (init) == TREE_LIST)
5445 init = build_constructor_from_list (TREE_TYPE (decl), init);
5446 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5447 DECL_INITIAL (decl) = init;
5448 DECL_INITIALIZED_P (decl) = 1;
5449 determine_visibility (decl);
5450 layout_var_decl (decl);
5451 maybe_commonize_var (decl);
5452 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5455 /* INIT is the initializer for a variable, as represented by the
5456 parser. Returns true iff INIT is value-dependent. */
5459 value_dependent_init_p (tree init)
5461 if (TREE_CODE (init) == TREE_LIST)
5462 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5463 return any_value_dependent_elements_p (init);
5464 else if (TREE_CODE (init) == CONSTRUCTOR)
5465 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5467 VEC(constructor_elt, gc) *elts;
5471 elts = CONSTRUCTOR_ELTS (init);
5472 nelts = VEC_length (constructor_elt, elts);
5473 for (i = 0; i < nelts; ++i)
5474 if (value_dependent_init_p (VEC_index (constructor_elt,
5479 /* It must be a simple expression, e.g., int i = 3; */
5480 return value_dependent_expression_p (init);
5485 /* Finish processing of a declaration;
5486 install its line number and initial value.
5487 If the length of an array type is not known before,
5488 it must be determined now, from the initial value, or it is an error.
5490 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5491 true, then INIT is an integral constant expression.
5493 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5494 if the (init) syntax was used. */
5497 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5498 tree asmspec_tree, int flags)
5502 const char *asmspec = NULL;
5503 int was_readonly = 0;
5504 bool var_definition_p = false;
5505 int saved_processing_template_decl;
5508 if (decl == error_mark_node)
5513 error ("assignment (not initialization) in declaration");
5517 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5518 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5519 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5521 type = TREE_TYPE (decl);
5522 if (type == error_mark_node)
5525 /* Assume no cleanup is required. */
5526 cleanup = NULL_TREE;
5527 saved_processing_template_decl = processing_template_decl;
5529 /* If a name was specified, get the string. */
5530 if (global_scope_p (current_binding_level))
5531 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5532 if (asmspec_tree && asmspec_tree != error_mark_node)
5533 asmspec = TREE_STRING_POINTER (asmspec_tree);
5535 if (current_class_type
5536 && CP_DECL_CONTEXT (decl) == current_class_type
5537 && TYPE_BEING_DEFINED (current_class_type)
5538 && (DECL_INITIAL (decl) || init))
5539 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5541 auto_node = type_uses_auto (type);
5544 if (init == NULL_TREE)
5546 error ("declaration of %q#D has no initializer", decl);
5547 TREE_TYPE (decl) = error_mark_node;
5550 if (TREE_CODE (init) == TREE_LIST)
5551 init = build_x_compound_expr_from_list (init, "initializer");
5552 if (describable_type (init))
5554 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5555 if (type == error_mark_node)
5560 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5562 if (init == ridpointers[(int)RID_DELETE])
5564 /* FIXME check this is 1st decl. */
5565 DECL_DELETED_FN (decl) = 1;
5566 DECL_DECLARED_INLINE_P (decl) = 1;
5567 DECL_INITIAL (decl) = error_mark_node;
5570 else if (init == ridpointers[(int)RID_DEFAULT])
5572 if (!defaultable_fn_p (decl))
5574 error ("%qD cannot be defaulted", decl);
5575 DECL_INITIAL (decl) = NULL_TREE;
5578 DECL_DEFAULTED_FN (decl) = 1;
5582 if (processing_template_decl)
5584 bool type_dependent_p;
5586 /* Add this declaration to the statement-tree. */
5587 if (at_function_scope_p ())
5588 add_decl_expr (decl);
5590 type_dependent_p = dependent_type_p (type);
5592 if (check_for_bare_parameter_packs (init))
5595 DECL_INITIAL (decl) = NULL_TREE;
5598 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5600 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5601 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5602 TREE_CONSTANT (decl) = 1;
5605 /* Generally, initializers in templates are expanded when the
5606 template is instantiated. But, if DECL is an integral
5607 constant static data member, then it can be used in future
5608 integral constant expressions, and its value must be
5611 && DECL_CLASS_SCOPE_P (decl)
5612 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5613 && !type_dependent_p
5614 && !value_dependent_init_p (init)))
5617 DECL_INITIAL (decl) = init;
5618 if (TREE_CODE (decl) == VAR_DECL
5619 && !DECL_PRETTY_FUNCTION_P (decl)
5620 && !type_dependent_p)
5621 maybe_deduce_size_from_array_init (decl, init);
5625 if (TREE_CODE (init) == TREE_LIST)
5627 /* If the parenthesized-initializer form was used (e.g.,
5628 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5629 arguments. (There is generally only one.) We convert them
5632 for (; list; list = TREE_CHAIN (list))
5634 tree elt = TREE_VALUE (list);
5635 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5639 init = fold_non_dependent_expr (init);
5640 processing_template_decl = 0;
5643 /* Take care of TYPE_DECLs up front. */
5644 if (TREE_CODE (decl) == TYPE_DECL)
5646 if (type != error_mark_node
5647 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5649 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5650 warning (0, "shadowing previous type declaration of %q#D", decl);
5651 set_identifier_type_value (DECL_NAME (decl), decl);
5654 /* If we have installed this as the canonical typedef for this
5655 type, and that type has not been defined yet, delay emitting
5656 the debug information for it, as we will emit it later. */
5657 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5658 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5659 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5661 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5666 /* A reference will be modified here, as it is initialized. */
5667 if (! DECL_EXTERNAL (decl)
5668 && TREE_READONLY (decl)
5669 && TREE_CODE (type) == REFERENCE_TYPE)
5672 TREE_READONLY (decl) = 0;
5675 if (TREE_CODE (decl) == VAR_DECL)
5677 /* Only PODs can have thread-local storage. Other types may require
5678 various kinds of non-trivial initialization. */
5679 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5680 error ("%qD cannot be thread-local because it has non-POD type %qT",
5681 decl, TREE_TYPE (decl));
5682 /* If this is a local variable that will need a mangled name,
5683 register it now. We must do this before processing the
5684 initializer for the variable, since the initialization might
5685 require a guard variable, and since the mangled name of the
5686 guard variable will depend on the mangled name of this
5688 if (DECL_FUNCTION_SCOPE_P (decl)
5689 && TREE_STATIC (decl)
5690 && !DECL_ARTIFICIAL (decl))
5691 push_local_name (decl);
5692 /* Convert the initializer to the type of DECL, if we have not
5693 already initialized DECL. */
5694 if (!DECL_INITIALIZED_P (decl)
5695 /* If !DECL_EXTERNAL then DECL is being defined. In the
5696 case of a static data member initialized inside the
5697 class-specifier, there can be an initializer even if DECL
5698 is *not* defined. */
5699 && (!DECL_EXTERNAL (decl) || init))
5701 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5704 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5705 /* Allow libjava/prims.cc define primitive classes. */
5706 if (init != NULL_TREE
5707 || jclass == NULL_TREE
5708 || TREE_CODE (jclass) != TYPE_DECL
5709 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5710 || !same_type_ignoring_top_level_qualifiers_p
5711 (type, TREE_TYPE (TREE_TYPE (jclass))))
5712 error ("Java object %qD not allocated with %<new%>", decl);
5717 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5718 if (init_const_expr_p)
5720 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5721 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5722 TREE_CONSTANT (decl) = 1;
5725 init = check_initializer (decl, init, flags, &cleanup);
5726 /* Thread-local storage cannot be dynamically initialized. */
5727 if (DECL_THREAD_LOCAL_P (decl) && init)
5729 error ("%qD is thread-local and so cannot be dynamically "
5730 "initialized", decl);
5734 /* Check that the initializer for a static data member was a
5735 constant. Although we check in the parser that the
5736 initializer is an integral constant expression, we do not
5737 simplify division-by-zero at the point at which it
5738 occurs. Therefore, in:
5740 struct S { static const int i = 7 / 0; };
5742 we issue an error at this point. It would
5743 probably be better to forbid division by zero in
5744 integral constant expressions. */
5745 if (DECL_EXTERNAL (decl) && init)
5747 error ("%qD cannot be initialized by a non-constant expression"
5748 " when being declared", decl);
5749 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5757 The memory occupied by any object of static storage
5758 duration is zero-initialized at program startup before
5759 any other initialization takes place.
5761 We cannot create an appropriate initializer until after
5762 the type of DECL is finalized. If DECL_INITIAL is set,
5763 then the DECL is statically initialized, and any
5764 necessary zero-initialization has already been performed. */
5765 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5766 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5767 /*nelts=*/NULL_TREE,
5768 /*static_storage_p=*/true);
5769 /* Remember that the initialization for this variable has
5771 DECL_INITIALIZED_P (decl) = 1;
5772 /* This declaration is the definition of this variable,
5773 unless we are initializing a static data member within
5774 the class specifier. */
5775 if (!DECL_EXTERNAL (decl))
5776 var_definition_p = true;
5778 /* If the variable has an array type, lay out the type, even if
5779 there is no initializer. It is valid to index through the
5780 array, and we must get TYPE_ALIGN set correctly on the array
5782 else if (TREE_CODE (type) == ARRAY_TYPE)
5785 else if (TREE_CODE (decl) == FIELD_DECL
5786 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5787 error ("non-static data member %qD has Java class type", decl);
5789 /* Add this declaration to the statement-tree. This needs to happen
5790 after the call to check_initializer so that the DECL_EXPR for a
5791 reference temp is added before the DECL_EXPR for the reference itself. */
5792 if (at_function_scope_p ())
5793 add_decl_expr (decl);
5795 /* Let the middle end know about variables and functions -- but not
5796 static data members in uninstantiated class templates. */
5797 if (!saved_processing_template_decl
5798 && (TREE_CODE (decl) == VAR_DECL
5799 || TREE_CODE (decl) == FUNCTION_DECL))
5801 if (TREE_CODE (decl) == VAR_DECL)
5803 layout_var_decl (decl);
5804 maybe_commonize_var (decl);
5807 /* This needs to happen after the linkage is set. */
5808 determine_visibility (decl);
5810 if (var_definition_p && TREE_STATIC (decl))
5812 /* If a TREE_READONLY variable needs initialization
5813 at runtime, it is no longer readonly and we need to
5814 avoid MEM_READONLY_P being set on RTL created for it. */
5817 if (TREE_READONLY (decl))
5818 TREE_READONLY (decl) = 0;
5821 else if (was_readonly)
5822 TREE_READONLY (decl) = 1;
5825 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5827 /* Check for abstractness of the type. Notice that there is no
5828 need to strip array types here since the check for those types
5829 is already done within create_array_type_for_decl. */
5830 if (TREE_CODE (type) == FUNCTION_TYPE
5831 || TREE_CODE (type) == METHOD_TYPE)
5832 abstract_virtuals_error (decl, TREE_TYPE (type));
5834 abstract_virtuals_error (decl, type);
5836 if (TREE_TYPE (decl) == error_mark_node)
5837 /* No initialization required. */
5839 else if (TREE_CODE (decl) == FUNCTION_DECL)
5843 if (init == ridpointers[(int)RID_DEFAULT])
5845 /* An out-of-class default definition is defined at
5846 the point where it is explicitly defaulted. */
5847 if (DECL_INITIAL (decl) == error_mark_node)
5848 synthesize_method (decl);
5851 error ("function %q#D is initialized like a variable", decl);
5853 /* else no initialization required. */
5855 else if (DECL_EXTERNAL (decl)
5856 && ! (DECL_LANG_SPECIFIC (decl)
5857 && DECL_NOT_REALLY_EXTERN (decl)))
5860 DECL_INITIAL (decl) = init;
5862 /* A variable definition. */
5863 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5864 /* Initialize the local variable. */
5865 initialize_local_var (decl, init);
5867 /* If a variable is defined, and then a subsequent
5868 definition with external linkage is encountered, we will
5869 get here twice for the same variable. We want to avoid
5870 calling expand_static_init more than once. For variables
5871 that are not static data members, we can call
5872 expand_static_init only when we actually process the
5873 initializer. It is not legal to redeclare a static data
5874 member, so this issue does not arise in that case. */
5875 else if (var_definition_p && TREE_STATIC (decl))
5876 expand_static_init (decl, init);
5879 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5880 reference, insert it in the statement-tree now. */
5882 push_cleanup (decl, cleanup, false);
5885 processing_template_decl = saved_processing_template_decl;
5888 TREE_READONLY (decl) = 1;
5890 /* If this was marked 'used', be sure it will be output. */
5891 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5892 mark_decl_referenced (decl);
5895 /* Returns a declaration for a VAR_DECL as if:
5897 extern "C" TYPE NAME;
5899 had been seen. Used to create compiler-generated global
5903 declare_global_var (tree name, tree type)
5907 push_to_top_level ();
5908 decl = build_decl (input_location, VAR_DECL, name, type);
5909 TREE_PUBLIC (decl) = 1;
5910 DECL_EXTERNAL (decl) = 1;
5911 DECL_ARTIFICIAL (decl) = 1;
5912 /* If the user has explicitly declared this variable (perhaps
5913 because the code we are compiling is part of a low-level runtime
5914 library), then it is possible that our declaration will be merged
5915 with theirs by pushdecl. */
5916 decl = pushdecl (decl);
5917 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5918 pop_from_top_level ();
5923 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5924 if "__cxa_atexit" is not being used) corresponding to the function
5925 to be called when the program exits. */
5928 get_atexit_fn_ptr_type (void)
5933 if (!atexit_fn_ptr_type_node)
5935 if (flag_use_cxa_atexit
5936 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5937 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5938 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5940 /* The parameter to "atexit" is "void (*)(void)". */
5941 arg_types = void_list_node;
5943 fn_type = build_function_type (void_type_node, arg_types);
5944 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5947 return atexit_fn_ptr_type_node;
5950 /* Returns a pointer to the `atexit' function. Note that if
5951 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5952 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5955 get_atexit_node (void)
5962 bool use_aeabi_atexit;
5967 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5969 /* The declaration for `__cxa_atexit' is:
5971 int __cxa_atexit (void (*)(void *), void *, void *)
5973 We build up the argument types and then then function type
5976 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5977 /* First, build the pointer-to-function type for the first
5979 fn_ptr_type = get_atexit_fn_ptr_type ();
5980 /* Then, build the rest of the argument types. */
5981 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5982 if (use_aeabi_atexit)
5984 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5985 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5989 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5990 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5992 /* And the final __cxa_atexit type. */
5993 fn_type = build_function_type (integer_type_node, arg_types);
5994 fn_ptr_type = build_pointer_type (fn_type);
5995 if (use_aeabi_atexit)
5996 name = "__aeabi_atexit";
5998 name = "__cxa_atexit";
6002 /* The declaration for `atexit' is:
6004 int atexit (void (*)());
6006 We build up the argument types and then then function type
6008 fn_ptr_type = get_atexit_fn_ptr_type ();
6009 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6010 /* Build the final atexit type. */
6011 fn_type = build_function_type (integer_type_node, arg_types);
6015 /* Now, build the function declaration. */
6016 push_lang_context (lang_name_c);
6017 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6018 mark_used (atexit_fndecl);
6019 pop_lang_context ();
6020 atexit_node = decay_conversion (atexit_fndecl);
6025 /* Returns the __dso_handle VAR_DECL. */
6028 get_dso_handle_node (void)
6030 if (dso_handle_node)
6031 return dso_handle_node;
6033 /* Declare the variable. */
6034 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6037 return dso_handle_node;
6040 /* Begin a new function with internal linkage whose job will be simply
6041 to destroy some particular variable. */
6043 static GTY(()) int start_cleanup_cnt;
6046 start_cleanup_fn (void)
6051 bool use_cxa_atexit = flag_use_cxa_atexit
6052 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6054 push_to_top_level ();
6056 /* No need to mangle this. */
6057 push_lang_context (lang_name_c);
6059 /* Build the name of the function. */
6060 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6061 /* Build the function declaration. */
6062 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6063 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6064 /* It's a function with internal linkage, generated by the
6066 TREE_PUBLIC (fndecl) = 0;
6067 DECL_ARTIFICIAL (fndecl) = 1;
6068 /* Make the function `inline' so that it is only emitted if it is
6069 actually needed. It is unlikely that it will be inlined, since
6070 it is only called via a function pointer, but we avoid unnecessary
6071 emissions this way. */
6072 DECL_DECLARED_INLINE_P (fndecl) = 1;
6073 DECL_INTERFACE_KNOWN (fndecl) = 1;
6074 /* Build the parameter. */
6079 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6080 DECL_CONTEXT (parmdecl) = fndecl;
6081 TREE_USED (parmdecl) = 1;
6082 DECL_ARGUMENTS (fndecl) = parmdecl;
6086 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6088 pop_lang_context ();
6090 return current_function_decl;
6093 /* Finish the cleanup function begun by start_cleanup_fn. */
6096 end_cleanup_fn (void)
6098 expand_or_defer_fn (finish_function (0));
6100 pop_from_top_level ();
6103 /* Generate code to handle the destruction of DECL, an object with
6104 static storage duration. */
6107 register_dtor_fn (tree decl)
6116 type = TREE_TYPE (decl);
6117 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6118 return void_zero_node;
6120 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6121 a class object, we can just pass the destructor to
6122 "__cxa_atexit"; we don't have to build a temporary function to do
6124 use_dtor = (flag_use_cxa_atexit
6125 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6126 && CLASS_TYPE_P (type));
6131 /* Find the destructor. */
6132 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6133 gcc_assert (idx >= 0);
6134 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6135 /* Make sure it is accessible. */
6136 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6140 /* Call build_cleanup before we enter the anonymous function so
6141 that any access checks will be done relative to the current
6142 scope, rather than the scope of the anonymous function. */
6143 build_cleanup (decl);
6145 /* Now start the function. */
6146 cleanup = start_cleanup_fn ();
6148 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6149 to the original function, rather than the anonymous one. That
6150 will make the back end think that nested functions are in use,
6151 which causes confusion. */
6152 push_deferring_access_checks (dk_no_check);
6153 fcall = build_cleanup (decl);
6154 pop_deferring_access_checks ();
6156 /* Create the body of the anonymous function. */
6157 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6158 finish_expr_stmt (fcall);
6159 finish_compound_stmt (compound_stmt);
6163 /* Call atexit with the cleanup function. */
6164 mark_used (cleanup);
6165 cleanup = build_address (cleanup);
6166 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6172 /* We must convert CLEANUP to the type that "__cxa_atexit"
6174 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6175 /* "__cxa_atexit" will pass the address of DECL to the
6176 cleanup function. */
6178 addr = build_address (decl);
6179 /* The declared type of the parameter to "__cxa_atexit" is
6180 "void *". For plain "T*", we could just let the
6181 machinery in cp_build_function_call convert it -- but if the
6182 type is "cv-qualified T *", then we need to convert it
6183 before passing it in, to avoid spurious errors. */
6184 addr = build_nop (ptr_type_node, addr);
6187 /* Since the cleanup functions we build ignore the address
6188 they're given, there's no reason to pass the actual address
6189 in, and, in general, it's cheaper to pass NULL than any
6191 addr = null_pointer_node;
6192 args = tree_cons (NULL_TREE,
6193 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6194 tf_warning_or_error),
6196 if (targetm.cxx.use_aeabi_atexit ())
6198 args = tree_cons (NULL_TREE, cleanup, args);
6199 args = tree_cons (NULL_TREE, addr, args);
6203 args = tree_cons (NULL_TREE, addr, args);
6204 args = tree_cons (NULL_TREE, cleanup, args);
6208 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6209 return cp_build_function_call (get_atexit_node (), args,
6210 tf_warning_or_error);
6213 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6214 is its initializer. Generate code to handle the construction
6215 and destruction of DECL. */
6218 expand_static_init (tree decl, tree init)
6220 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6221 gcc_assert (TREE_STATIC (decl));
6223 /* Some variables require no initialization. */
6225 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6226 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6229 if (DECL_FUNCTION_SCOPE_P (decl))
6231 /* Emit code to perform this initialization but once. */
6232 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6233 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6234 tree guard, guard_addr;
6235 tree acquire_fn, release_fn, abort_fn;
6238 /* Emit code to perform this initialization but once. This code
6241 static <type> guard;
6242 if (!guard.first_byte) {
6243 if (__cxa_guard_acquire (&guard)) {
6246 // Do initialization.
6247 flag = true; __cxa_guard_release (&guard);
6248 // Register variable for destruction at end of program.
6250 if (!flag) __cxa_guard_abort (&guard);
6254 Note that the `flag' variable is only set to 1 *after* the
6255 initialization is complete. This ensures that an exception,
6256 thrown during the construction, will cause the variable to
6257 reinitialized when we pass through this code again, as per:
6261 If the initialization exits by throwing an exception, the
6262 initialization is not complete, so it will be tried again
6263 the next time control enters the declaration.
6265 This process should be thread-safe, too; multiple threads
6266 should not be able to initialize the variable more than
6269 /* Create the guard variable. */
6270 guard = get_guard (decl);
6272 /* This optimization isn't safe on targets with relaxed memory
6273 consistency. On such targets we force synchronization in
6274 __cxa_guard_acquire. */
6275 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6277 /* Begin the conditional initialization. */
6278 if_stmt = begin_if_stmt ();
6279 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6280 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6283 if (flag_threadsafe_statics)
6285 guard_addr = build_address (guard);
6287 acquire_fn = get_identifier ("__cxa_guard_acquire");
6288 release_fn = get_identifier ("__cxa_guard_release");
6289 abort_fn = get_identifier ("__cxa_guard_abort");
6290 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6292 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6294 tree vfntype = build_function_type (void_type_node, argtypes);
6295 acquire_fn = push_library_fn
6296 (acquire_fn, build_function_type (integer_type_node, argtypes),
6298 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6299 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6303 release_fn = identifier_global_value (release_fn);
6304 abort_fn = identifier_global_value (abort_fn);
6307 inner_if_stmt = begin_if_stmt ();
6308 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6311 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6312 begin = get_target_expr (boolean_false_node);
6313 flag = TARGET_EXPR_SLOT (begin);
6315 TARGET_EXPR_CLEANUP (begin)
6316 = build3 (COND_EXPR, void_type_node, flag,
6318 build_call_n (abort_fn, 1, guard_addr));
6319 CLEANUP_EH_ONLY (begin) = 1;
6321 /* Do the initialization itself. */
6322 init = add_stmt_to_compound (begin, init);
6323 init = add_stmt_to_compound
6324 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6325 init = add_stmt_to_compound
6326 (init, build_call_n (release_fn, 1, guard_addr));
6329 init = add_stmt_to_compound (init, set_guard (guard));
6331 /* Use atexit to register a function for destroying this static
6333 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6335 finish_expr_stmt (init);
6337 if (flag_threadsafe_statics)
6339 finish_compound_stmt (inner_then_clause);
6340 finish_then_clause (inner_if_stmt);
6341 finish_if_stmt (inner_if_stmt);
6344 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6346 finish_compound_stmt (then_clause);
6347 finish_then_clause (if_stmt);
6348 finish_if_stmt (if_stmt);
6352 static_aggregates = tree_cons (init, decl, static_aggregates);
6356 /* Make TYPE a complete type based on INITIAL_VALUE.
6357 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6358 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6359 3 if the initializer list is empty (in pedantic mode). */
6362 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6365 tree type, elt_type;
6369 unsigned HOST_WIDE_INT i;
6372 /* An array of character type can be initialized from a
6373 brace-enclosed string constant.
6375 FIXME: this code is duplicated from reshape_init. Probably
6376 we should just call reshape_init here? */
6377 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6378 && TREE_CODE (initial_value) == CONSTRUCTOR
6379 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6381 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6382 tree value = VEC_index (constructor_elt, v, 0)->value;
6384 if (TREE_CODE (value) == STRING_CST
6385 && VEC_length (constructor_elt, v) == 1)
6386 initial_value = value;
6389 /* If any of the elements are parameter packs, we can't actually
6390 complete this type now because the array size is dependent. */
6391 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6393 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6396 if (PACK_EXPANSION_P (value))
6402 failure = complete_array_type (ptype, initial_value, do_default);
6404 /* We can create the array before the element type is complete, which
6405 means that we didn't have these two bits set in the original type
6406 either. In completing the type, we are expected to propagate these
6407 bits. See also complete_type which does the same thing for arrays
6410 if (TYPE_DOMAIN (type))
6412 elt_type = TREE_TYPE (type);
6413 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6414 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6415 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6421 /* Return zero if something is declared to be a member of type
6422 CTYPE when in the context of CUR_TYPE. STRING is the error
6423 message to print in that case. Otherwise, quietly return 1. */
6426 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6428 if (ctype && ctype != cur_type)
6430 if (flags == DTOR_FLAG)
6431 error ("destructor for alien class %qT cannot be a member", ctype);
6433 error ("constructor for alien class %qT cannot be a member", ctype);
6439 /* Subroutine of `grokdeclarator'. */
6441 /* Generate errors possibly applicable for a given set of specifiers.
6442 This is for ARM $7.1.2. */
6445 bad_specifiers (tree object,
6454 error ("%qD declared as a %<virtual%> %s", object, type);
6456 error ("%qD declared as an %<inline%> %s", object, type);
6458 error ("%<const%> and %<volatile%> function specifiers on "
6459 "%qD invalid in %s declaration",
6462 error ("%q+D declared as a friend", object);
6464 && (TREE_CODE (object) == TYPE_DECL
6465 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6466 && !TYPE_REFFN_P (TREE_TYPE (object))
6467 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6468 error ("%q+D declared with an exception specification", object);
6471 /* DECL is a member function or static data member and is presently
6472 being defined. Check that the definition is taking place in a
6476 check_class_member_definition_namespace (tree decl)
6478 /* These checks only apply to member functions and static data
6480 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6481 || TREE_CODE (decl) == VAR_DECL);
6482 /* We check for problems with specializations in pt.c in
6483 check_specialization_namespace, where we can issue better
6485 if (processing_specialization)
6487 /* There are no restrictions on the placement of
6488 explicit instantiations. */
6489 if (processing_explicit_instantiation)
6493 A member function definition that appears outside of the
6494 class definition shall appear in a namespace scope enclosing
6495 the class definition.
6499 The definition for a static data member shall appear in a
6500 namespace scope enclosing the member's class definition. */
6501 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6502 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6503 decl, DECL_CONTEXT (decl));
6506 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6507 METHOD_TYPE for a non-static member function; QUALS are the
6508 cv-qualifiers that apply to the function. */
6511 build_this_parm (tree type, cp_cv_quals quals)
6516 cp_cv_quals this_quals;
6518 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6519 /* The `this' parameter is implicitly `const'; it cannot be
6521 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6522 qual_type = cp_build_qualified_type (this_type, this_quals);
6523 parm = build_artificial_parm (this_identifier, qual_type);
6524 cp_apply_type_quals_to_decl (this_quals, parm);
6528 /* CTYPE is class type, or null if non-class.
6529 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6531 DECLARATOR is the function's name.
6532 PARMS is a chain of PARM_DECLs for the function.
6533 VIRTUALP is truthvalue of whether the function is virtual or not.
6534 FLAGS are to be passed through to `grokclassfn'.
6535 QUALS are qualifiers indicating whether the function is `const'
6537 RAISES is a list of exceptions that this function can raise.
6538 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6539 not look, and -1 if we should not call `grokclassfn' at all.
6541 SFK is the kind of special function (if any) for the new function.
6543 Returns `NULL_TREE' if something goes wrong, after issuing
6544 applicable error messages. */
6547 grokfndecl (tree ctype,
6551 tree orig_declarator,
6553 enum overload_flags flags,
6560 special_function_kind sfk,
6565 location_t location)
6568 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6572 type = build_exception_variant (type, raises);
6574 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6576 /* If we have an explicit location, use it, otherwise use whatever
6577 build_lang_decl used (probably input_location). */
6578 if (location != UNKNOWN_LOCATION)
6579 DECL_SOURCE_LOCATION (decl) = location;
6581 if (TREE_CODE (type) == METHOD_TYPE)
6584 parm = build_this_parm (type, quals);
6585 TREE_CHAIN (parm) = parms;
6588 DECL_ARGUMENTS (decl) = parms;
6589 for (t = parms; t; t = TREE_CHAIN (t))
6590 DECL_CONTEXT (t) = decl;
6591 /* Propagate volatile out from type to decl. */
6592 if (TYPE_VOLATILE (type))
6593 TREE_THIS_VOLATILE (decl) = 1;
6595 /* Setup decl according to sfk. */
6598 case sfk_constructor:
6599 case sfk_copy_constructor:
6600 DECL_CONSTRUCTOR_P (decl) = 1;
6602 case sfk_destructor:
6603 DECL_DESTRUCTOR_P (decl) = 1;
6609 /* If pointers to member functions use the least significant bit to
6610 indicate whether a function is virtual, ensure a pointer
6611 to this function will have that bit clear. */
6612 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6613 && TREE_CODE (type) == METHOD_TYPE
6614 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6615 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6618 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6622 ("defining explicit specialization %qD in friend declaration",
6626 tree fns = TREE_OPERAND (orig_declarator, 0);
6627 tree args = TREE_OPERAND (orig_declarator, 1);
6629 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6631 /* Something like `template <class T> friend void f<T>()'. */
6632 error ("invalid use of template-id %qD in declaration "
6633 "of primary template",
6639 /* A friend declaration of the form friend void f<>(). Record
6640 the information in the TEMPLATE_ID_EXPR. */
6641 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6643 if (TREE_CODE (fns) == COMPONENT_REF)
6645 /* Due to bison parser ickiness, we will have already looked
6646 up an operator_name or PFUNCNAME within the current class
6647 (see template_id in parse.y). If the current class contains
6648 such a name, we'll get a COMPONENT_REF here. Undo that. */
6650 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6651 == current_class_type);
6652 fns = TREE_OPERAND (fns, 1);
6654 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6655 || TREE_CODE (fns) == OVERLOAD);
6656 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6658 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6659 if (TREE_PURPOSE (t)
6660 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6662 error ("default arguments are not allowed in declaration "
6663 "of friend template specialization %qD",
6670 error ("%<inline%> is not allowed in declaration of friend "
6671 "template specialization %qD",
6678 /* If this decl has namespace scope, set that up. */
6680 set_decl_namespace (decl, in_namespace, friendp);
6682 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6684 /* `main' and builtins have implicit 'C' linkage. */
6685 if ((MAIN_NAME_P (declarator)
6686 || (IDENTIFIER_LENGTH (declarator) > 10
6687 && IDENTIFIER_POINTER (declarator)[0] == '_'
6688 && IDENTIFIER_POINTER (declarator)[1] == '_'
6689 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6690 && current_lang_name == lang_name_cplusplus
6691 && ctype == NULL_TREE
6692 /* NULL_TREE means global namespace. */
6693 && DECL_CONTEXT (decl) == NULL_TREE)
6694 SET_DECL_LANGUAGE (decl, lang_c);
6696 /* Should probably propagate const out from type to decl I bet (mrs). */
6699 DECL_STATIC_FUNCTION_P (decl) = 1;
6700 DECL_CONTEXT (decl) = ctype;
6705 DECL_CONTEXT (decl) = ctype;
6707 check_class_member_definition_namespace (decl);
6710 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6712 if (processing_template_decl)
6713 error ("cannot declare %<::main%> to be a template");
6715 error ("cannot declare %<::main%> to be inline");
6717 error ("cannot declare %<::main%> to be static");
6722 /* Members of anonymous types and local classes have no linkage; make
6723 them internal. If a typedef is made later, this will be changed. */
6724 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6725 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6730 /* [basic.link]: A name with no linkage (notably, the name of a class
6731 or enumeration declared in a local scope) shall not be used to
6732 declare an entity with linkage.
6734 Only check this for public decls for now. See core 319, 389. */
6735 t = no_linkage_check (TREE_TYPE (decl),
6736 /*relaxed_p=*/false);
6739 if (TYPE_ANONYMOUS_P (t))
6741 if (DECL_EXTERN_C_P (decl))
6742 /* Allow this; it's pretty common in C. */;
6745 permerror (input_location, "non-local function %q#D uses anonymous type",
6747 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6748 permerror (input_location, "%q+#D does not refer to the unqualified "
6749 "type, so it is not used for linkage",
6754 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6758 TREE_PUBLIC (decl) = publicp;
6761 DECL_INTERFACE_KNOWN (decl) = 1;
6762 DECL_NOT_REALLY_EXTERN (decl) = 1;
6765 /* If the declaration was declared inline, mark it as such. */
6767 DECL_DECLARED_INLINE_P (decl) = 1;
6769 DECL_EXTERNAL (decl) = 1;
6770 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6773 ? G_("static member function %qD cannot have cv-qualifier")
6774 : G_("non-member function %qD cannot have cv-qualifier"),
6776 quals = TYPE_UNQUALIFIED;
6779 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6780 && !grok_op_properties (decl, /*complain=*/true))
6783 if (ctype && decl_function_context (decl))
6784 DECL_NO_STATIC_CHAIN (decl) = 1;
6787 /* Make the init_value nonzero so pushdecl knows this is not
6788 tentative. error_mark_node is replaced later with the BLOCK. */
6789 DECL_INITIAL (decl) = error_mark_node;
6791 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6792 TREE_NOTHROW (decl) = 1;
6794 /* Caller will do the rest of this. */
6798 if (ctype != NULL_TREE)
6799 grokclassfn (ctype, decl, flags);
6801 decl = check_explicit_specialization (orig_declarator, decl,
6804 4 * (friendp != 0));
6805 if (decl == error_mark_node)
6810 cplus_decl_attributes (&decl, *attrlist, 0);
6811 *attrlist = NULL_TREE;
6814 /* Check main's type after attributes have been applied. */
6815 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6817 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6820 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6822 error ("%<::main%> must return %<int%>");
6823 newtype = build_function_type (integer_type_node, oldtypeargs);
6824 TREE_TYPE (decl) = newtype;
6827 check_main_parameter_types (decl);
6830 if (ctype != NULL_TREE
6831 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6834 tree old_decl = check_classfn (ctype, decl,
6835 (processing_template_decl
6836 > template_class_depth (ctype))
6837 ? current_template_parms
6840 if (old_decl == error_mark_node)
6848 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6849 /* Because grokfndecl is always supposed to return a
6850 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6851 here. We depend on our callers to figure out that its
6852 really a template that's being returned. */
6853 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6855 if (DECL_STATIC_FUNCTION_P (old_decl)
6856 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6857 /* Remove the `this' parm added by grokclassfn.
6858 XXX Isn't this done in start_function, too? */
6859 revert_static_member_fn (decl);
6860 if (DECL_ARTIFICIAL (old_decl))
6862 error ("definition of implicitly-declared %qD", old_decl);
6866 /* Since we've smashed OLD_DECL to its
6867 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6868 if (TREE_CODE (decl) == TEMPLATE_DECL)
6869 decl = DECL_TEMPLATE_RESULT (decl);
6871 /* Attempt to merge the declarations. This can fail, in
6872 the case of some invalid specialization declarations. */
6873 pushed_scope = push_scope (ctype);
6874 ok = duplicate_decls (decl, old_decl, friendp);
6876 pop_scope (pushed_scope);
6879 error ("no %q#D member function declared in class %qT",
6887 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6890 if (ctype == NULL_TREE || check)
6894 DECL_VIRTUAL_P (decl) = 1;
6899 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6900 the linkage that DECL will receive in the object file. */
6903 set_linkage_for_static_data_member (tree decl)
6905 /* A static data member always has static storage duration and
6906 external linkage. Note that static data members are forbidden in
6907 local classes -- the only situation in which a class has
6908 non-external linkage. */
6909 TREE_PUBLIC (decl) = 1;
6910 TREE_STATIC (decl) = 1;
6911 /* For non-template classes, static data members are always put
6912 out in exactly those files where they are defined, just as
6913 with ordinary namespace-scope variables. */
6914 if (!processing_template_decl)
6915 DECL_INTERFACE_KNOWN (decl) = 1;
6918 /* Create a VAR_DECL named NAME with the indicated TYPE.
6920 If SCOPE is non-NULL, it is the class type or namespace containing
6921 the variable. If SCOPE is NULL, the variable should is created in
6922 the innermost enclosings scope. */
6925 grokvardecl (tree type,
6927 const cp_decl_specifier_seq *declspecs,
6933 tree explicit_scope;
6935 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6937 /* Compute the scope in which to place the variable, but remember
6938 whether or not that scope was explicitly specified by the user. */
6939 explicit_scope = scope;
6942 /* An explicit "extern" specifier indicates a namespace-scope
6944 if (declspecs->storage_class == sc_extern)
6945 scope = current_namespace;
6946 else if (!at_function_scope_p ())
6947 scope = current_scope ();
6951 && (/* If the variable is a namespace-scope variable declared in a
6952 template, we need DECL_LANG_SPECIFIC. */
6953 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6954 /* Similarly for namespace-scope variables with language linkage
6956 || (TREE_CODE (scope) == NAMESPACE_DECL
6957 && current_lang_name != lang_name_cplusplus)
6958 /* Similarly for static data members. */
6960 decl = build_lang_decl (VAR_DECL, name, type);
6962 decl = build_decl (input_location, VAR_DECL, name, type);
6964 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6965 set_decl_namespace (decl, explicit_scope, 0);
6967 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6969 if (declspecs->storage_class == sc_extern)
6971 DECL_THIS_EXTERN (decl) = 1;
6972 DECL_EXTERNAL (decl) = !initialized;
6975 if (DECL_CLASS_SCOPE_P (decl))
6977 set_linkage_for_static_data_member (decl);
6978 /* This function is only called with out-of-class definitions. */
6979 DECL_EXTERNAL (decl) = 0;
6980 check_class_member_definition_namespace (decl);
6982 /* At top level, either `static' or no s.c. makes a definition
6983 (perhaps tentative), and absence of `static' makes it public. */
6984 else if (toplevel_bindings_p ())
6986 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6987 && (DECL_THIS_EXTERN (decl) || ! constp));
6988 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6990 /* Not at top level, only `static' makes a static definition. */
6993 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6994 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6997 if (declspecs->specs[(int)ds_thread])
6998 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7000 if (TREE_PUBLIC (decl))
7002 /* [basic.link]: A name with no linkage (notably, the name of a class
7003 or enumeration declared in a local scope) shall not be used to
7004 declare an entity with linkage.
7006 Only check this for public decls for now. */
7007 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7010 if (TYPE_ANONYMOUS_P (t))
7012 if (DECL_EXTERN_C_P (decl))
7013 /* Allow this; it's pretty common in C. */
7017 /* DRs 132, 319 and 389 seem to indicate types with
7018 no linkage can only be used to declare extern "C"
7019 entities. Since it's not always an error in the
7020 ISO C++ 90 Standard, we only issue a warning. */
7021 warning (0, "non-local variable %q#D uses anonymous type",
7023 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7024 warning (0, "%q+#D does not refer to the unqualified "
7025 "type, so it is not used for linkage",
7030 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7034 DECL_INTERFACE_KNOWN (decl) = 1;
7039 /* Create and return a canonical pointer to member function type, for
7040 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7043 build_ptrmemfunc_type (tree type)
7047 tree unqualified_variant = NULL_TREE;
7049 if (type == error_mark_node)
7052 /* If a canonical type already exists for this type, use it. We use
7053 this method instead of type_hash_canon, because it only does a
7054 simple equality check on the list of field members. */
7056 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7059 /* Make sure that we always have the unqualified pointer-to-member
7061 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7063 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7065 t = make_class_type (RECORD_TYPE);
7066 xref_basetypes (t, NULL_TREE);
7068 /* Let the front end know this is a pointer to member function... */
7069 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7070 /* ... and not really a class type. */
7071 SET_CLASS_TYPE_P (t, 0);
7073 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7076 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7078 TREE_CHAIN (field) = fields;
7081 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7083 /* Zap out the name so that the back end will give us the debugging
7084 information for this anonymous RECORD_TYPE. */
7085 TYPE_NAME (t) = NULL_TREE;
7087 /* If this is not the unqualified form of this pointer-to-member
7088 type, set the TYPE_MAIN_VARIANT for this type to be the
7089 unqualified type. Since they are actually RECORD_TYPEs that are
7090 not variants of each other, we must do this manually. */
7091 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7093 t = build_qualified_type (t, cp_type_quals (type));
7094 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7095 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7096 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7097 TREE_TYPE (TYPE_BINFO (t)) = t;
7100 /* Cache this pointer-to-member type so that we can find it again
7102 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7104 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7105 SET_TYPE_STRUCTURAL_EQUALITY (t);
7106 else if (TYPE_CANONICAL (type) != type)
7107 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7112 /* Create and return a pointer to data member type. */
7115 build_ptrmem_type (tree class_type, tree member_type)
7117 if (TREE_CODE (member_type) == METHOD_TYPE)
7121 arg_types = TYPE_ARG_TYPES (member_type);
7122 class_type = (cp_build_qualified_type
7124 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7126 = build_method_type_directly (class_type,
7127 TREE_TYPE (member_type),
7128 TREE_CHAIN (arg_types));
7129 return build_ptrmemfunc_type (build_pointer_type (member_type));
7133 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7134 return build_offset_type (class_type, member_type);
7138 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7139 Check to see that the definition is valid. Issue appropriate error
7140 messages. Return 1 if the definition is particularly bad, or 0
7144 check_static_variable_definition (tree decl, tree type)
7146 /* Motion 10 at San Diego: If a static const integral data member is
7147 initialized with an integral constant expression, the initializer
7148 may appear either in the declaration (within the class), or in
7149 the definition, but not both. If it appears in the class, the
7150 member is a member constant. The file-scope definition is always
7152 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7154 error ("invalid in-class initialization of static data member "
7155 "of non-integral type %qT",
7157 /* If we just return the declaration, crashes will sometimes
7158 occur. We therefore return void_type_node, as if this were a
7159 friend declaration, to cause callers to completely ignore
7160 this declaration. */
7163 else if (!CP_TYPE_CONST_P (type))
7164 error ("ISO C++ forbids in-class initialization of non-const "
7165 "static member %qD",
7167 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7168 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7169 "%qD of non-integral type %qT", decl, type);
7174 /* Given the SIZE (i.e., number of elements) in an array, compute an
7175 appropriate index type for the array. If non-NULL, NAME is the
7176 name of the thing being declared. */
7179 compute_array_index_type (tree name, tree size)
7183 tree abi_1_itype = NULL_TREE;
7185 if (error_operand_p (size))
7186 return error_mark_node;
7188 type = TREE_TYPE (size);
7189 /* The array bound must be an integer type. */
7190 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7193 error ("size of array %qD has non-integral type %qT", name, type);
7195 error ("size of array has non-integral type %qT", type);
7196 size = integer_one_node;
7197 type = TREE_TYPE (size);
7200 /* We can only call value_dependent_expression_p on integral constant
7201 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7202 set if this isn't one. */
7203 if (processing_template_decl
7204 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7206 /* We cannot do any checking for a SIZE that isn't known to be
7207 constant. Just build the index type and mark that it requires
7208 structural equality checks. */
7209 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7210 size, integer_one_node));
7211 if (!TREE_SIDE_EFFECTS (size))
7213 TYPE_DEPENDENT_P (itype) = 1;
7214 TYPE_DEPENDENT_P_VALID (itype) = 1;
7216 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7220 if (!abi_version_at_least (2) && processing_template_decl)
7221 /* For abi-1, we handled all instances in templates the same way,
7222 even when they were non-dependent. This affects the manglings
7223 produced. So, we do the normal checking for non-dependent
7224 sizes, but at the end we'll return the same type that abi-1
7225 would have, but with TYPE_CANONICAL set to the "right"
7226 value that the current ABI would provide. */
7227 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7228 size, integer_one_node));
7230 /* The size might be the result of a cast. */
7231 STRIP_TYPE_NOPS (size);
7233 /* It might be a const variable or enumeration constant. */
7234 size = integral_constant_value (size);
7236 /* Normally, the array-bound will be a constant. */
7237 if (TREE_CODE (size) == INTEGER_CST)
7239 /* Check to see if the array bound overflowed. Make that an
7240 error, no matter how generous we're being. */
7241 constant_expression_error (size);
7243 /* An array must have a positive number of elements. */
7244 if (INT_CST_LT (size, integer_zero_node))
7247 error ("size of array %qD is negative", name);
7249 error ("size of array is negative");
7250 size = integer_one_node;
7252 /* As an extension we allow zero-sized arrays. We always allow
7253 them in system headers because glibc uses them. */
7254 else if (integer_zerop (size) && !in_system_header)
7257 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7259 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7262 else if (TREE_CONSTANT (size))
7264 /* `(int) &fn' is not a valid array bound. */
7266 error ("size of array %qD is not an integral constant-expression",
7269 error ("size of array is not an integral constant-expression");
7270 size = integer_one_node;
7272 else if (pedantic && warn_vla != 0)
7275 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7277 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7279 else if (warn_vla > 0)
7283 "variable length array %qD is used", name);
7286 "variable length array is used");
7289 if (processing_template_decl && !TREE_CONSTANT (size))
7290 /* A variable sized array. */
7291 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7294 HOST_WIDE_INT saved_processing_template_decl;
7296 /* Compute the index of the largest element in the array. It is
7297 one less than the number of elements in the array. We save
7298 and restore PROCESSING_TEMPLATE_DECL so that computations in
7299 cp_build_binary_op will be appropriately folded. */
7300 saved_processing_template_decl = processing_template_decl;
7301 processing_template_decl = 0;
7302 itype = cp_build_binary_op (input_location,
7304 cp_convert (ssizetype, size),
7305 cp_convert (ssizetype, integer_one_node),
7306 tf_warning_or_error);
7307 itype = fold (itype);
7308 processing_template_decl = saved_processing_template_decl;
7310 if (!TREE_CONSTANT (itype))
7311 /* A variable sized array. */
7312 itype = variable_size (itype);
7313 /* Make sure that there was no overflow when creating to a signed
7314 index type. (For example, on a 32-bit machine, an array with
7315 size 2^32 - 1 is too big.) */
7316 else if (TREE_CODE (itype) == INTEGER_CST
7317 && TREE_OVERFLOW (itype))
7319 error ("overflow in array dimension");
7320 TREE_OVERFLOW (itype) = 0;
7324 /* Create and return the appropriate index type. */
7327 tree t = build_index_type (itype);
7328 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7332 return build_index_type (itype);
7335 /* Returns the scope (if any) in which the entity declared by
7336 DECLARATOR will be located. If the entity was declared with an
7337 unqualified name, NULL_TREE is returned. */
7340 get_scope_of_declarator (const cp_declarator *declarator)
7342 while (declarator && declarator->kind != cdk_id)
7343 declarator = declarator->declarator;
7345 /* If the declarator-id is a SCOPE_REF, the scope in which the
7346 declaration occurs is the first operand. */
7348 && declarator->u.id.qualifying_scope)
7349 return declarator->u.id.qualifying_scope;
7351 /* Otherwise, the declarator is not a qualified name; the entity will
7352 be declared in the current scope. */
7356 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7357 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7361 create_array_type_for_decl (tree name, tree type, tree size)
7363 tree itype = NULL_TREE;
7364 const char* error_msg;
7366 /* If things have already gone awry, bail now. */
7367 if (type == error_mark_node || size == error_mark_node)
7368 return error_mark_node;
7370 /* Assume that everything will go OK. */
7373 /* There are some types which cannot be array elements. */
7374 switch (TREE_CODE (type))
7377 error_msg = "array of void";
7381 error_msg = "array of functions";
7384 case REFERENCE_TYPE:
7385 error_msg = "array of references";
7389 error_msg = "array of function members";
7396 /* If something went wrong, issue an error-message and return. */
7400 error ("declaration of %qD as %s", name, error_msg);
7402 error ("creating %s", error_msg);
7404 return error_mark_node;
7409 The constant expressions that specify the bounds of the arrays
7410 can be omitted only for the first member of the sequence. */
7411 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7414 error ("declaration of %qD as multidimensional array must "
7415 "have bounds for all dimensions except the first",
7418 error ("multidimensional array must have bounds for all "
7419 "dimensions except the first");
7421 return error_mark_node;
7424 /* Figure out the index type for the array. */
7426 itype = compute_array_index_type (name, size);
7429 T is called the array element type; this type shall not be [...] an
7430 abstract class type. */
7431 abstract_virtuals_error (name, type);
7433 return build_cplus_array_type (type, itype);
7436 /* Check that it's OK to declare a function with the indicated TYPE.
7437 SFK indicates the kind of special function (if any) that this
7438 function is. OPTYPE is the type given in a conversion operator
7439 declaration, or the class type for a constructor/destructor.
7440 Returns the actual return type of the function; that
7441 may be different than TYPE if an error occurs, or for certain
7442 special functions. */
7445 check_special_function_return_type (special_function_kind sfk,
7451 case sfk_constructor:
7453 error ("return type specification for constructor invalid");
7455 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7456 type = build_pointer_type (optype);
7458 type = void_type_node;
7461 case sfk_destructor:
7463 error ("return type specification for destructor invalid");
7464 /* We can't use the proper return type here because we run into
7465 problems with ambiguous bases and covariant returns.
7466 Java classes are left unchanged because (void *) isn't a valid
7467 Java type, and we don't want to change the Java ABI. */
7468 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7469 type = build_pointer_type (void_type_node);
7471 type = void_type_node;
7474 case sfk_conversion:
7476 error ("return type specified for %<operator %T%>", optype);
7487 /* A variable or data member (whose unqualified name is IDENTIFIER)
7488 has been declared with the indicated TYPE. If the TYPE is not
7489 acceptable, issue an error message and return a type to use for
7490 error-recovery purposes. */
7493 check_var_type (tree identifier, tree type)
7495 if (VOID_TYPE_P (type))
7498 error ("unnamed variable or field declared void");
7499 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7501 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7502 error ("variable or field %qE declared void", identifier);
7505 error ("variable or field declared void");
7506 type = error_mark_node;
7512 /* Given declspecs and a declarator (abstract or otherwise), determine
7513 the name and type of the object declared and construct a DECL node
7516 DECLSPECS points to the representation of declaration-specifier
7517 sequence that precedes declarator.
7519 DECL_CONTEXT says which syntactic context this declaration is in:
7520 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7521 FUNCDEF for a function definition. Like NORMAL but a few different
7522 error messages in each case. Return value may be zero meaning
7523 this definition is too screwy to try to parse.
7524 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7525 handle member functions (which have FIELD context).
7526 Return value may be zero meaning this definition is too screwy to
7528 PARM for a parameter declaration (either within a function prototype
7529 or before a function body). Make a PARM_DECL, or return void_type_node.
7530 CATCHPARM for a parameter declaration before a catch clause.
7531 TYPENAME if for a typename (in a cast or sizeof).
7532 Don't make a DECL node; just return the ..._TYPE node.
7533 FIELD for a struct or union field; make a FIELD_DECL.
7534 BITFIELD for a field with specified width.
7535 INITIALIZED is as for start_decl.
7537 ATTRLIST is a pointer to the list of attributes, which may be NULL
7538 if there are none; *ATTRLIST may be modified if attributes from inside
7539 the declarator should be applied to the declaration.
7541 When this function is called, scoping variables (such as
7542 CURRENT_CLASS_TYPE) should reflect the scope in which the
7543 declaration occurs, not the scope in which the new declaration will
7544 be placed. For example, on:
7548 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7551 Returns a DECL (if a declarator is present), a TYPE (if there is no
7552 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7556 grokdeclarator (const cp_declarator *declarator,
7557 const cp_decl_specifier_seq *declspecs,
7558 enum decl_context decl_context,
7562 tree type = NULL_TREE;
7564 int virtualp, explicitp, friendp, inlinep, staticp;
7565 int explicit_int = 0;
7566 int explicit_char = 0;
7567 int defaulted_int = 0;
7568 tree dependent_name = NULL_TREE;
7570 tree typedef_decl = NULL_TREE;
7571 const char *name = NULL;
7572 tree typedef_type = NULL_TREE;
7573 /* True if this declarator is a function definition. */
7574 bool funcdef_flag = false;
7575 cp_declarator_kind innermost_code = cdk_error;
7578 /* See the code below that used this. */
7579 tree decl_attr = NULL_TREE;
7582 /* Keep track of what sort of function is being processed
7583 so that we can warn about default return values, or explicit
7584 return values which do not match prescribed defaults. */
7585 special_function_kind sfk = sfk_none;
7587 tree dname = NULL_TREE;
7588 tree ctor_return_type = NULL_TREE;
7589 enum overload_flags flags = NO_SPECIAL;
7590 /* cv-qualifiers that apply to the declarator, for a declaration of
7591 a member function. */
7592 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7593 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7595 tree raises = NULL_TREE;
7596 int template_count = 0;
7597 tree returned_attrs = NULL_TREE;
7598 tree parms = NULL_TREE;
7599 const cp_declarator *id_declarator;
7600 /* The unqualified name of the declarator; either an
7601 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7602 tree unqualified_id;
7603 /* The class type, if any, in which this entity is located,
7604 or NULL_TREE if none. Note that this value may be different from
7605 the current class type; for example if an attempt is made to declare
7606 "A::f" inside "B", this value will be "A". */
7607 tree ctype = current_class_type;
7608 /* The NAMESPACE_DECL for the namespace in which this entity is
7609 located. If an unqualified name is used to declare the entity,
7610 this value will be NULL_TREE, even if the entity is located at
7612 tree in_namespace = NULL_TREE;
7613 cp_storage_class storage_class;
7614 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7615 bool type_was_error_mark_node = false;
7616 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7617 bool set_no_warning = false;
7618 bool template_type_arg = false;
7621 signed_p = declspecs->specs[(int)ds_signed];
7622 unsigned_p = declspecs->specs[(int)ds_unsigned];
7623 short_p = declspecs->specs[(int)ds_short];
7624 long_p = declspecs->specs[(int)ds_long];
7625 longlong = declspecs->specs[(int)ds_long] >= 2;
7626 thread_p = declspecs->specs[(int)ds_thread];
7628 if (decl_context == FUNCDEF)
7629 funcdef_flag = true, decl_context = NORMAL;
7630 else if (decl_context == MEMFUNCDEF)
7631 funcdef_flag = true, decl_context = FIELD;
7632 else if (decl_context == BITFIELD)
7633 bitfield = 1, decl_context = FIELD;
7634 else if (decl_context == TEMPLATE_TYPE_ARG)
7635 template_type_arg = true, decl_context = TYPENAME;
7637 if (initialized > 1)
7638 funcdef_flag = true;
7640 /* Look inside a declarator for the name being declared
7641 and get it as a string, for an error message. */
7642 for (id_declarator = declarator;
7644 id_declarator = id_declarator->declarator)
7646 if (id_declarator->kind != cdk_id)
7647 innermost_code = id_declarator->kind;
7649 switch (id_declarator->kind)
7652 if (id_declarator->declarator
7653 && id_declarator->declarator->kind == cdk_id)
7655 sfk = id_declarator->declarator->u.id.sfk;
7656 if (sfk == sfk_destructor)
7663 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7664 tree decl = id_declarator->u.id.unqualified_name;
7667 if (qualifying_scope)
7669 if (at_function_scope_p ())
7673 A declarator-id shall not be qualified except
7676 None of the cases are permitted in block
7678 if (qualifying_scope == global_namespace)
7679 error ("invalid use of qualified-name %<::%D%>",
7681 else if (TYPE_P (qualifying_scope))
7682 error ("invalid use of qualified-name %<%T::%D%>",
7683 qualifying_scope, decl);
7685 error ("invalid use of qualified-name %<%D::%D%>",
7686 qualifying_scope, decl);
7687 return error_mark_node;
7689 else if (TYPE_P (qualifying_scope))
7691 ctype = qualifying_scope;
7692 if (innermost_code != cdk_function
7693 && current_class_type
7694 && !UNIQUELY_DERIVED_FROM_P (ctype,
7695 current_class_type))
7697 error ("type %qT is not derived from type %qT",
7698 ctype, current_class_type);
7699 return error_mark_node;
7702 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7703 in_namespace = qualifying_scope;
7705 switch (TREE_CODE (decl))
7711 if (innermost_code != cdk_function)
7713 error ("declaration of %qD as non-function", decl);
7714 return error_mark_node;
7716 else if (!qualifying_scope
7717 && !(current_class_type && at_class_scope_p ()))
7719 error ("declaration of %qD as non-member", decl);
7720 return error_mark_node;
7723 type = TREE_OPERAND (decl, 0);
7725 type = constructor_name (type);
7726 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7731 case TEMPLATE_ID_EXPR:
7733 tree fns = TREE_OPERAND (decl, 0);
7736 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7738 gcc_assert (is_overloaded_fn (dname));
7739 dname = DECL_NAME (get_first_fn (dname));
7744 case IDENTIFIER_NODE:
7745 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7748 if (C_IS_RESERVED_WORD (dname))
7750 error ("declarator-id missing; using reserved word %qD",
7752 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7754 else if (!IDENTIFIER_TYPENAME_P (dname))
7755 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7758 gcc_assert (flags == NO_SPECIAL);
7759 flags = TYPENAME_FLAG;
7760 ctor_return_type = TREE_TYPE (dname);
7761 sfk = sfk_conversion;
7762 if (is_typename_at_global_scope (dname))
7763 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7765 name = "<invalid operator>";
7782 return error_mark_node;
7787 if (id_declarator->kind == cdk_id)
7793 The declarator in a function-definition shall have the form
7794 D1 ( parameter-declaration-clause) ... */
7795 if (funcdef_flag && innermost_code != cdk_function)
7797 error ("function definition does not declare parameters");
7798 return error_mark_node;
7801 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7802 && innermost_code != cdk_function
7803 && ! (ctype && !declspecs->any_specifiers_p))
7805 error ("declaration of %qD as non-function", dname);
7806 return error_mark_node;
7809 /* Anything declared one level down from the top level
7810 must be one of the parameters of a function
7811 (because the body is at least two levels down). */
7813 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7814 by not allowing C++ class definitions to specify their parameters
7815 with xdecls (must be spec.d in the parmlist).
7817 Since we now wait to push a class scope until we are sure that
7818 we are in a legitimate method context, we must set oldcname
7819 explicitly (since current_class_name is not yet alive).
7821 We also want to avoid calling this a PARM if it is in a namespace. */
7823 if (decl_context == NORMAL && !toplevel_bindings_p ())
7825 struct cp_binding_level *b = current_binding_level;
7826 current_binding_level = b->level_chain;
7827 if (current_binding_level != 0 && toplevel_bindings_p ())
7828 decl_context = PARM;
7829 current_binding_level = b;
7833 name = decl_context == PARM ? "parameter" : "type name";
7835 /* If there were multiple types specified in the decl-specifier-seq,
7836 issue an error message. */
7837 if (declspecs->multiple_types_p)
7839 error ("two or more data types in declaration of %qs", name);
7840 return error_mark_node;
7843 if (declspecs->conflicting_specifiers_p)
7845 error ("conflicting specifiers in declaration of %qs", name);
7846 return error_mark_node;
7849 /* Extract the basic type from the decl-specifier-seq. */
7850 type = declspecs->type;
7851 if (type == error_mark_node)
7854 type_was_error_mark_node = true;
7856 /* If the entire declaration is itself tagged as deprecated then
7857 suppress reports of deprecated items. */
7858 if (type && TREE_DEPRECATED (type)
7859 && deprecated_state != DEPRECATED_SUPPRESS)
7860 warn_deprecated_use (type, NULL_TREE);
7861 if (type && TREE_CODE (type) == TYPE_DECL)
7863 typedef_decl = type;
7864 type = TREE_TYPE (typedef_decl);
7865 if (TREE_DEPRECATED (type)
7866 && DECL_ARTIFICIAL (typedef_decl)
7867 && deprecated_state != DEPRECATED_SUPPRESS)
7868 warn_deprecated_use (type, NULL_TREE);
7870 /* No type at all: default to `int', and set DEFAULTED_INT
7871 because it was not a user-defined typedef. */
7872 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7874 /* These imply 'int'. */
7875 type = integer_type_node;
7879 explicit_int = declspecs->explicit_int_p;
7880 explicit_char = declspecs->explicit_char_p;
7883 /* See the code below that used this. */
7885 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7887 typedef_type = type;
7890 if (sfk != sfk_conversion)
7891 ctor_return_type = ctype;
7893 if (sfk != sfk_none)
7894 type = check_special_function_return_type (sfk, type,
7896 else if (type == NULL_TREE)
7902 /* We handle `main' specially here, because 'main () { }' is so
7903 common. With no options, it is allowed. With -Wreturn-type,
7904 it is a warning. It is only an error with -pedantic-errors. */
7905 is_main = (funcdef_flag
7906 && dname && MAIN_NAME_P (dname)
7907 && ctype == NULL_TREE
7908 && in_namespace == NULL_TREE
7909 && current_namespace == global_namespace);
7911 if (type_was_error_mark_node)
7912 /* We've already issued an error, don't complain more. */;
7913 else if (in_system_header || flag_ms_extensions)
7914 /* Allow it, sigh. */;
7916 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7918 pedwarn (input_location, OPT_pedantic,
7919 "ISO C++ forbids declaration of %qs with no type", name);
7921 warning (OPT_Wreturn_type,
7922 "ISO C++ forbids declaration of %qs with no type", name);
7924 type = integer_type_node;
7929 /* Now process the modifiers that were specified
7930 and check for invalid combinations. */
7932 /* Long double is a special combination. */
7933 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7936 type = build_qualified_type (long_double_type_node,
7937 cp_type_quals (type));
7940 /* Check all other uses of type modifiers. */
7942 if (unsigned_p || signed_p || long_p || short_p)
7946 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7947 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7948 else if (signed_p && unsigned_p)
7949 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7950 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7951 error ("%<long long%> invalid for %qs", name);
7952 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7953 error ("%<long%> invalid for %qs", name);
7954 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7955 error ("%<short%> invalid for %qs", name);
7956 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7957 error ("%<long%> or %<short%> invalid for %qs", name);
7958 else if ((long_p || short_p) && explicit_char)
7959 error ("%<long%> or %<short%> specified with char for %qs", name);
7960 else if (long_p && short_p)
7961 error ("%<long%> and %<short%> specified together for %qs", name);
7962 else if (type == char16_type_node || type == char32_type_node)
7964 if (signed_p || unsigned_p)
7965 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7966 else if (short_p || long_p)
7967 error ("%<short%> or %<long%> invalid for %qs", name);
7972 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7974 pedwarn (input_location, OPT_pedantic,
7975 "long, short, signed or unsigned used invalidly for %qs",
7977 if (flag_pedantic_errors)
7982 /* Discard the type modifiers if they are invalid. */
7993 /* Decide whether an integer type is signed or not.
7994 Optionally treat bitfields as signed by default. */
7998 It is implementation-defined whether a plain (neither
7999 explicitly signed or unsigned) char, short, int, or long
8000 bit-field is signed or unsigned.
8002 Naturally, we extend this to long long as well. Note that
8003 this does not include wchar_t. */
8004 || (bitfield && !flag_signed_bitfields
8006 /* A typedef for plain `int' without `signed' can be
8007 controlled just like plain `int', but a typedef for
8008 `signed int' cannot be so controlled. */
8010 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8011 && TREE_CODE (type) == INTEGER_TYPE
8012 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8015 type = long_long_unsigned_type_node;
8017 type = long_unsigned_type_node;
8019 type = short_unsigned_type_node;
8020 else if (type == char_type_node)
8021 type = unsigned_char_type_node;
8022 else if (typedef_decl)
8023 type = unsigned_type_for (type);
8025 type = unsigned_type_node;
8027 else if (signed_p && type == char_type_node)
8028 type = signed_char_type_node;
8030 type = long_long_integer_type_node;
8032 type = long_integer_type_node;
8034 type = short_integer_type_node;
8036 if (declspecs->specs[(int)ds_complex])
8038 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8039 error ("complex invalid for %qs", name);
8040 /* If we just have "complex", it is equivalent to
8041 "complex double", but if any modifiers at all are specified it is
8042 the complex form of TYPE. E.g, "complex short" is
8043 "complex short int". */
8045 else if (defaulted_int && ! longlong
8046 && ! (long_p || short_p || signed_p || unsigned_p))
8047 type = complex_double_type_node;
8048 else if (type == integer_type_node)
8049 type = complex_integer_type_node;
8050 else if (type == float_type_node)
8051 type = complex_float_type_node;
8052 else if (type == double_type_node)
8053 type = complex_double_type_node;
8054 else if (type == long_double_type_node)
8055 type = complex_long_double_type_node;
8057 type = build_complex_type (type);
8060 type_quals = TYPE_UNQUALIFIED;
8061 if (declspecs->specs[(int)ds_const])
8062 type_quals |= TYPE_QUAL_CONST;
8063 if (declspecs->specs[(int)ds_volatile])
8064 type_quals |= TYPE_QUAL_VOLATILE;
8065 if (declspecs->specs[(int)ds_restrict])
8066 type_quals |= TYPE_QUAL_RESTRICT;
8067 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8068 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8071 if (TREE_CODE (type) == FUNCTION_TYPE
8072 && type_quals != TYPE_UNQUALIFIED)
8074 /* This was an error in C++98 (cv-qualifiers cannot be added to
8075 a function type), but DR 295 makes the code well-formed by
8076 dropping the extra qualifiers. */
8079 tree bad_type = build_qualified_type (type, type_quals);
8080 pedwarn (input_location, OPT_pedantic,
8081 "ignoring %qV qualifiers added to function type %qT",
8084 type_quals = TYPE_UNQUALIFIED;
8086 type_quals |= cp_type_quals (type);
8087 type = cp_build_qualified_type_real
8088 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8089 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8090 /* We might have ignored or rejected some of the qualifiers. */
8091 type_quals = cp_type_quals (type);
8094 inlinep = !! declspecs->specs[(int)ds_inline];
8095 virtualp = !! declspecs->specs[(int)ds_virtual];
8096 explicitp = !! declspecs->specs[(int)ds_explicit];
8098 storage_class = declspecs->storage_class;
8099 if (storage_class == sc_static)
8100 staticp = 1 + (decl_context == FIELD);
8102 if (virtualp && staticp == 2)
8104 error ("member %qD cannot be declared both virtual and static", dname);
8105 storage_class = sc_none;
8108 friendp = !! declspecs->specs[(int)ds_friend];
8110 if (dependent_name && !friendp)
8112 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8113 return error_mark_node;
8116 /* Issue errors about use of storage classes for parameters. */
8117 if (decl_context == PARM)
8119 if (declspecs->specs[(int)ds_typedef])
8121 error ("typedef declaration invalid in parameter declaration");
8122 return error_mark_node;
8124 else if (storage_class == sc_static
8125 || storage_class == sc_extern
8127 error ("storage class specifiers invalid in parameter declarations");
8129 if (type_uses_auto (type))
8131 error ("parameter declared %<auto%>");
8132 type = error_mark_node;
8136 /* Give error if `virtual' is used outside of class declaration. */
8138 && (current_class_name == NULL_TREE || decl_context != FIELD))
8140 error ("%<virtual%> outside class declaration");
8144 /* Static anonymous unions are dealt with here. */
8145 if (staticp && decl_context == TYPENAME
8147 && ANON_AGGR_TYPE_P (declspecs->type))
8148 decl_context = FIELD;
8150 /* Warn about storage classes that are invalid for certain
8151 kinds of declarations (parameters, typenames, etc.). */
8154 && storage_class != sc_extern
8155 && storage_class != sc_static)
8156 || declspecs->specs[(int)ds_typedef]))
8158 error ("multiple storage classes in declaration of %qs", name);
8161 if (decl_context != NORMAL
8162 && ((storage_class != sc_none
8163 && storage_class != sc_mutable)
8166 if ((decl_context == PARM || decl_context == CATCHPARM)
8167 && (storage_class == sc_register
8168 || storage_class == sc_auto))
8170 else if (declspecs->specs[(int)ds_typedef])
8172 else if (decl_context == FIELD
8173 /* C++ allows static class elements. */
8174 && storage_class == sc_static)
8175 /* C++ also allows inlines and signed and unsigned elements,
8176 but in those cases we don't come in here. */
8180 if (decl_context == FIELD)
8181 error ("storage class specified for %qs", name);
8184 if (decl_context == PARM || decl_context == CATCHPARM)
8185 error ("storage class specified for parameter %qs", name);
8187 error ("storage class specified for typename");
8189 if (storage_class == sc_register
8190 || storage_class == sc_auto
8191 || storage_class == sc_extern
8193 storage_class = sc_none;
8196 else if (storage_class == sc_extern && funcdef_flag
8197 && ! toplevel_bindings_p ())
8198 error ("nested function %qs declared %<extern%>", name);
8199 else if (toplevel_bindings_p ())
8201 if (storage_class == sc_auto)
8202 error ("top-level declaration of %qs specifies %<auto%>", name);
8205 && storage_class != sc_extern
8206 && storage_class != sc_static)
8208 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8213 if (storage_class && friendp)
8215 error ("storage class specifiers invalid in friend function declarations");
8216 storage_class = sc_none;
8221 unqualified_id = NULL_TREE;
8224 unqualified_id = id_declarator->u.id.unqualified_name;
8225 switch (TREE_CODE (unqualified_id))
8228 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8229 if (TYPE_P (unqualified_id))
8230 unqualified_id = constructor_name (unqualified_id);
8233 case IDENTIFIER_NODE:
8234 case TEMPLATE_ID_EXPR:
8242 /* Determine the type of the entity declared by recurring on the
8244 for (; declarator; declarator = declarator->declarator)
8246 const cp_declarator *inner_declarator;
8249 if (type == error_mark_node)
8250 return error_mark_node;
8252 attrs = declarator->attributes;
8258 if (declarator == NULL || declarator->kind == cdk_id)
8259 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8260 if (declarator->kind == cdk_function)
8261 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8262 if (declarator->kind == cdk_array)
8263 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8264 returned_attrs = decl_attributes (&type,
8265 chainon (returned_attrs, attrs),
8269 if (declarator->kind == cdk_id)
8272 inner_declarator = declarator->declarator;
8274 switch (declarator->kind)
8277 type = create_array_type_for_decl (dname, type,
8278 declarator->u.array.bounds);
8286 /* Declaring a function type.
8287 Make sure we have a valid type for the function to return. */
8289 if (type_quals != TYPE_UNQUALIFIED)
8291 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8292 warning (OPT_Wignored_qualifiers,
8293 "type qualifiers ignored on function return type");
8294 /* We now know that the TYPE_QUALS don't apply to the
8295 decl, but to its return type. */
8296 type_quals = TYPE_UNQUALIFIED;
8297 set_no_warning = true;
8299 errmsg = targetm.invalid_return_type (type);
8303 type = integer_type_node;
8306 /* Error about some types functions can't return. */
8308 if (TREE_CODE (type) == FUNCTION_TYPE)
8310 error ("%qs declared as function returning a function", name);
8311 return error_mark_node;
8313 if (TREE_CODE (type) == ARRAY_TYPE)
8315 error ("%qs declared as function returning an array", name);
8316 return error_mark_node;
8319 /* Pick up type qualifiers which should be applied to `this'. */
8320 memfn_quals = declarator->u.function.qualifiers;
8322 /* Pick up the exception specifications. */
8323 raises = declarator->u.function.exception_specification;
8325 /* Say it's a definition only for the CALL_EXPR
8326 closest to the identifier. */
8327 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8329 /* Handle a late-specified return type. */
8332 if (type_uses_auto (type))
8334 if (!declarator->u.function.late_return_type)
8336 error ("%qs function uses %<auto%> type specifier without"
8337 " late return type", name);
8338 return error_mark_node;
8340 else if (!is_auto (type))
8342 error ("%qs function with late return type has"
8343 " %qT as its type rather than plain %<auto%>",
8345 return error_mark_node;
8348 else if (declarator->u.function.late_return_type)
8350 error ("%qs function with late return type not declared"
8351 " with %<auto%> type specifier", name);
8352 return error_mark_node;
8355 type = splice_late_return_type
8356 (type, declarator->u.function.late_return_type);
8357 if (type == error_mark_node)
8358 return error_mark_node;
8360 if (ctype == NULL_TREE
8361 && decl_context == FIELD
8363 && (friendp == 0 || dname == current_class_name))
8364 ctype = current_class_type;
8366 if (ctype && (sfk == sfk_constructor
8367 || sfk == sfk_destructor))
8369 /* We are within a class's scope. If our declarator name
8370 is the same as the class name, and we are defining
8371 a function, then it is a constructor/destructor, and
8372 therefore returns a void type. */
8374 /* ISO C++ 12.4/2. A destructor may not be declared
8375 const or volatile. A destructor may not be
8378 ISO C++ 12.1. A constructor may not be declared
8379 const or volatile. A constructor may not be
8380 virtual. A constructor may not be static. */
8382 error ((flags == DTOR_FLAG)
8383 ? "destructor cannot be static member function"
8384 : "constructor cannot be static member function");
8387 error ((flags == DTOR_FLAG)
8388 ? "destructors may not be cv-qualified"
8389 : "constructors may not be cv-qualified");
8390 memfn_quals = TYPE_UNQUALIFIED;
8393 if (decl_context == FIELD
8394 && !member_function_or_else (ctype,
8397 return error_mark_node;
8399 if (flags != DTOR_FLAG)
8401 /* It's a constructor. */
8406 permerror (input_location, "constructors cannot be declared virtual");
8409 if (decl_context == FIELD
8410 && sfk != sfk_constructor)
8411 return error_mark_node;
8413 if (decl_context == FIELD)
8419 error ("can't initialize friend function %qs", name);
8422 /* Cannot be both friend and virtual. */
8423 error ("virtual functions cannot be friends");
8426 if (decl_context == NORMAL)
8427 error ("friend declaration not in class definition");
8428 if (current_function_decl && funcdef_flag)
8429 error ("can't define friend function %qs in a local "
8433 else if (ctype && sfk == sfk_conversion)
8437 maybe_warn_cpp0x ("explicit conversion operators");
8442 arg_types = grokparms (declarator->u.function.parameters,
8445 if (inner_declarator
8446 && inner_declarator->kind == cdk_id
8447 && inner_declarator->u.id.sfk == sfk_destructor
8448 && arg_types != void_list_node)
8450 error ("destructors may not have parameters");
8451 arg_types = void_list_node;
8455 type = build_function_type (type, arg_types);
8462 /* Filter out pointers-to-references and references-to-references.
8463 We can get these if a TYPE_DECL is used. */
8465 if (TREE_CODE (type) == REFERENCE_TYPE)
8467 if (declarator->kind != cdk_reference)
8469 error ("cannot declare pointer to %q#T", type);
8470 type = TREE_TYPE (type);
8473 /* In C++0x, we allow reference to reference declarations
8474 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8475 and template type arguments [14.3.1/4 temp.arg.type]. The
8476 check for direct reference to reference declarations, which
8477 are still forbidden, occurs below. Reasoning behind the change
8478 can be found in DR106, DR540, and the rvalue reference
8480 else if (cxx_dialect == cxx98)
8482 error ("cannot declare reference to %q#T", type);
8483 type = TREE_TYPE (type);
8486 else if (VOID_TYPE_P (type))
8488 if (declarator->kind == cdk_reference)
8489 error ("cannot declare reference to %q#T", type);
8490 else if (declarator->kind == cdk_ptrmem)
8491 error ("cannot declare pointer to %q#T member", type);
8494 /* We now know that the TYPE_QUALS don't apply to the decl,
8495 but to the target of the pointer. */
8496 type_quals = TYPE_UNQUALIFIED;
8498 if (declarator->kind == cdk_ptrmem
8499 && (TREE_CODE (type) == FUNCTION_TYPE
8500 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8502 memfn_quals |= cp_type_quals (type);
8503 type = build_memfn_type (type,
8504 declarator->u.pointer.class_type,
8506 memfn_quals = TYPE_UNQUALIFIED;
8509 if (TREE_CODE (type) == FUNCTION_TYPE
8510 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8511 error ("cannot declare %s to qualified function type %qT",
8512 declarator->kind == cdk_reference ? "reference" : "pointer",
8515 if (declarator->kind == cdk_reference)
8517 /* In C++0x, the type we are creating a reference to might be
8518 a typedef which is itself a reference type. In that case,
8519 we follow the reference collapsing rules in
8520 [7.1.3/8 dcl.typedef] to create the final reference type:
8522 "If a typedef TD names a type that is a reference to a type
8523 T, an attempt to create the type 'lvalue reference to cv TD'
8524 creates the type 'lvalue reference to T,' while an attempt
8525 to create the type "rvalue reference to cv TD' creates the
8528 if (!VOID_TYPE_P (type))
8529 type = cp_build_reference_type
8530 ((TREE_CODE (type) == REFERENCE_TYPE
8531 ? TREE_TYPE (type) : type),
8532 (declarator->u.reference.rvalue_ref
8533 && (TREE_CODE(type) != REFERENCE_TYPE
8534 || TYPE_REF_IS_RVALUE (type))));
8536 /* In C++0x, we need this check for direct reference to
8537 reference declarations, which are forbidden by
8538 [8.3.2/5 dcl.ref]. Reference to reference declarations
8539 are only allowed indirectly through typedefs and template
8540 type arguments. Example:
8542 void foo(int & &); // invalid ref-to-ref decl
8544 typedef int & int_ref;
8545 void foo(int_ref &); // valid ref-to-ref decl
8547 if (inner_declarator && inner_declarator->kind == cdk_reference)
8548 error ("cannot declare reference to %q#T, which is not "
8549 "a typedef or a template type argument", type);
8551 else if (TREE_CODE (type) == METHOD_TYPE)
8552 type = build_ptrmemfunc_type (build_pointer_type (type));
8553 else if (declarator->kind == cdk_ptrmem)
8555 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8557 if (declarator->u.pointer.class_type == error_mark_node)
8558 /* We will already have complained. */
8559 type = error_mark_node;
8561 type = build_ptrmem_type (declarator->u.pointer.class_type,
8565 type = build_pointer_type (type);
8567 /* Process a list of type modifier keywords (such as
8568 const or volatile) that were given inside the `*' or `&'. */
8570 if (declarator->u.pointer.qualifiers)
8573 = cp_build_qualified_type (type,
8574 declarator->u.pointer.qualifiers);
8575 type_quals = cp_type_quals (type);
8588 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8589 && TREE_CODE (type) != FUNCTION_TYPE
8590 && TREE_CODE (type) != METHOD_TYPE)
8592 error ("template-id %qD used as a declarator",
8594 unqualified_id = dname;
8597 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8598 qualified with a class-name, turn it into a METHOD_TYPE, unless
8599 we know that the function is static. We take advantage of this
8600 opportunity to do other processing that pertains to entities
8601 explicitly declared to be class members. Note that if DECLARATOR
8602 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8603 would not have exited the loop above. */
8605 && declarator->u.id.qualifying_scope
8606 && TYPE_P (declarator->u.id.qualifying_scope))
8610 ctype = declarator->u.id.qualifying_scope;
8611 ctype = TYPE_MAIN_VARIANT (ctype);
8613 while (t != NULL_TREE && CLASS_TYPE_P (t))
8615 /* You're supposed to have one `template <...>' for every
8616 template class, but you don't need one for a full
8617 specialization. For example:
8619 template <class T> struct S{};
8620 template <> struct S<int> { void f(); };
8621 void S<int>::f () {}
8623 is correct; there shouldn't be a `template <>' for the
8624 definition of `S<int>::f'. */
8625 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8626 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8627 /* T is an explicit (not partial) specialization. All
8628 containing classes must therefore also be explicitly
8631 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8632 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8633 template_count += 1;
8635 t = TYPE_MAIN_DECL (t);
8636 t = DECL_CONTEXT (t);
8639 if (ctype == current_class_type)
8643 permerror (input_location, "member functions are implicitly friends of their class");
8647 permerror (declarator->id_loc,
8648 "extra qualification %<%T::%> on member %qs",
8651 else if (/* If the qualifying type is already complete, then we
8652 can skip the following checks. */
8653 !COMPLETE_TYPE_P (ctype)
8654 && (/* If the function is being defined, then
8655 qualifying type must certainly be complete. */
8657 /* A friend declaration of "T::f" is OK, even if
8658 "T" is a template parameter. But, if this
8659 function is not a friend, the qualifying type
8661 || (!friendp && !CLASS_TYPE_P (ctype))
8662 /* For a declaration, the type need not be
8663 complete, if either it is dependent (since there
8664 is no meaningful definition of complete in that
8665 case) or the qualifying class is currently being
8667 || !(dependent_type_p (ctype)
8668 || currently_open_class (ctype)))
8669 /* Check that the qualifying type is complete. */
8670 && !complete_type_or_else (ctype, NULL_TREE))
8671 return error_mark_node;
8672 else if (TREE_CODE (type) == FUNCTION_TYPE)
8674 tree sname = declarator->u.id.unqualified_name;
8676 if (current_class_type
8677 && (!friendp || funcdef_flag))
8680 ? "cannot define member function %<%T::%s%> within %<%T%>"
8681 : "cannot declare member function %<%T::%s%> within %<%T%>",
8682 ctype, name, current_class_type);
8683 return error_mark_node;
8686 if (TREE_CODE (sname) == IDENTIFIER_NODE
8687 && NEW_DELETE_OPNAME_P (sname))
8688 /* Overloaded operator new and operator delete
8689 are always static functions. */
8692 type = build_memfn_type (type, ctype, memfn_quals);
8694 else if (declspecs->specs[(int)ds_typedef]
8695 && current_class_type)
8697 error ("cannot declare member %<%T::%s%> within %qT",
8698 ctype, name, current_class_type);
8699 return error_mark_node;
8703 /* Now TYPE has the actual type. */
8708 *attrlist = chainon (returned_attrs, *attrlist);
8710 attrlist = &returned_attrs;
8713 /* Handle parameter packs. */
8714 if (parameter_pack_p)
8716 if (decl_context == PARM)
8717 /* Turn the type into a pack expansion.*/
8718 type = make_pack_expansion (type);
8720 error ("non-parameter %qs cannot be a parameter pack", name);
8723 /* Did array size calculations overflow? */
8725 if (TREE_CODE (type) == ARRAY_TYPE
8726 && COMPLETE_TYPE_P (type)
8727 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8728 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8730 error ("size of array %qs is too large", name);
8731 /* If we proceed with the array type as it is, we'll eventually
8732 crash in tree_low_cst(). */
8733 type = error_mark_node;
8736 if ((decl_context == FIELD || decl_context == PARM)
8737 && !processing_template_decl
8738 && variably_modified_type_p (type, NULL_TREE))
8740 if (decl_context == FIELD)
8741 error ("data member may not have variably modified type %qT", type);
8743 error ("parameter may not have variably modified type %qT", type);
8744 type = error_mark_node;
8747 if (explicitp == 1 || (explicitp && friendp))
8749 /* [dcl.fct.spec] The explicit specifier shall only be used in
8750 declarations of constructors within a class definition. */
8751 error ("only declarations of constructors can be %<explicit%>");
8755 if (storage_class == sc_mutable)
8757 if (decl_context != FIELD || friendp)
8759 error ("non-member %qs cannot be declared %<mutable%>", name);
8760 storage_class = sc_none;
8762 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8764 error ("non-object member %qs cannot be declared %<mutable%>", name);
8765 storage_class = sc_none;
8767 else if (TREE_CODE (type) == FUNCTION_TYPE
8768 || TREE_CODE (type) == METHOD_TYPE)
8770 error ("function %qs cannot be declared %<mutable%>", name);
8771 storage_class = sc_none;
8775 error ("static %qs cannot be declared %<mutable%>", name);
8776 storage_class = sc_none;
8778 else if (type_quals & TYPE_QUAL_CONST)
8780 error ("const %qs cannot be declared %<mutable%>", name);
8781 storage_class = sc_none;
8785 /* If this is declaring a typedef name, return a TYPE_DECL. */
8786 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8790 /* Note that the grammar rejects storage classes
8791 in typenames, fields or parameters. */
8792 if (current_lang_name == lang_name_java)
8793 TYPE_FOR_JAVA (type) = 1;
8795 /* This declaration:
8797 typedef void f(int) const;
8799 declares a function type which is not a member of any
8800 particular class, but which is cv-qualified; for
8801 example "f S::*" declares a pointer to a const-qualified
8802 member function of S. We record the cv-qualification in the
8804 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8806 type = cp_build_qualified_type (type, memfn_quals);
8808 /* We have now dealt with these qualifiers. */
8809 memfn_quals = TYPE_UNQUALIFIED;
8812 if (decl_context == FIELD)
8813 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8815 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8816 if (id_declarator && declarator->u.id.qualifying_scope) {
8817 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8818 TREE_TYPE (decl) = error_mark_node;
8821 if (decl_context != FIELD)
8823 if (!current_function_decl)
8824 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8825 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8826 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8827 (current_function_decl)))
8828 /* The TYPE_DECL is "abstract" because there will be
8829 clones of this constructor/destructor, and there will
8830 be copies of this TYPE_DECL generated in those
8832 DECL_ABSTRACT (decl) = 1;
8834 else if (constructor_name_p (unqualified_id, current_class_type))
8835 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8836 "as enclosing class",
8839 /* If the user declares "typedef struct {...} foo" then the
8840 struct will have an anonymous name. Fill that name in now.
8841 Nothing can refer to it, so nothing needs know about the name
8843 if (type != error_mark_node
8846 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8847 && TYPE_ANONYMOUS_P (type)
8848 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8852 /* Replace the anonymous name with the real name everywhere. */
8853 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8855 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8857 debug_hooks->set_name (t, decl);
8858 TYPE_NAME (t) = decl;
8862 if (TYPE_LANG_SPECIFIC (type))
8863 TYPE_WAS_ANONYMOUS (type) = 1;
8865 /* If this is a typedef within a template class, the nested
8866 type is a (non-primary) template. The name for the
8867 template needs updating as well. */
8868 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8869 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8870 = TYPE_IDENTIFIER (type);
8872 /* FIXME remangle member functions; member functions of a
8873 type with external linkage have external linkage. */
8877 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8878 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8880 bad_specifiers (decl, "type", virtualp,
8881 memfn_quals != TYPE_UNQUALIFIED,
8882 inlinep, friendp, raises != NULL_TREE);
8887 /* Detect the case of an array type of unspecified size
8888 which came, as such, direct from a typedef name.
8889 We must copy the type, so that the array's domain can be
8890 individually set by the object's initializer. */
8892 if (type && typedef_type
8893 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8894 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8895 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8897 /* Detect where we're using a typedef of function type to declare a
8898 function. PARMS will not be set, so we must create it now. */
8900 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8902 tree decls = NULL_TREE;
8905 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8907 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8909 TREE_CHAIN (decl) = decls;
8913 parms = nreverse (decls);
8915 if (decl_context != TYPENAME)
8917 /* A cv-qualifier-seq shall only be part of the function type
8918 for a non-static member function. [8.3.5/4 dcl.fct] */
8919 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8920 && (current_class_type == NULL_TREE || staticp) )
8923 ? G_("qualified function types cannot be used to "
8924 "declare static member functions")
8925 : G_("qualified function types cannot be used to "
8926 "declare free functions"));
8927 type = TYPE_MAIN_VARIANT (type);
8930 /* The qualifiers on the function type become the qualifiers on
8931 the non-static member function. */
8932 memfn_quals |= cp_type_quals (type);
8936 /* If this is a type name (such as, in a cast or sizeof),
8937 compute the type and return it now. */
8939 if (decl_context == TYPENAME)
8941 /* Note that the grammar rejects storage classes
8942 in typenames, fields or parameters. */
8943 if (type_quals != TYPE_UNQUALIFIED)
8944 type_quals = TYPE_UNQUALIFIED;
8946 /* Special case: "friend class foo" looks like a TYPENAME context. */
8949 if (type_quals != TYPE_UNQUALIFIED)
8951 error ("type qualifiers specified for friend class declaration");
8952 type_quals = TYPE_UNQUALIFIED;
8956 error ("%<inline%> specified for friend class declaration");
8962 /* Don't allow friend declaration without a class-key. */
8963 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8964 permerror (input_location, "template parameters cannot be friends");
8965 else if (TREE_CODE (type) == TYPENAME_TYPE)
8966 permerror (input_location, "friend declaration requires class-key, "
8967 "i.e. %<friend class %T::%D%>",
8968 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8970 permerror (input_location, "friend declaration requires class-key, "
8971 "i.e. %<friend %#T%>",
8975 /* Only try to do this stuff if we didn't already give up. */
8976 if (type != integer_type_node)
8978 /* A friendly class? */
8979 if (current_class_type)
8980 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8983 error ("trying to make class %qT a friend of global scope",
8986 type = void_type_node;
8989 else if (memfn_quals)
8991 if (ctype == NULL_TREE
8992 && TREE_CODE (type) == METHOD_TYPE)
8993 ctype = TYPE_METHOD_BASETYPE (type);
8996 type = build_memfn_type (type, ctype, memfn_quals);
8997 /* Core issue #547: need to allow this in template type args. */
8998 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8999 type = cp_build_qualified_type (type, memfn_quals);
9001 error ("invalid qualifiers on non-member function type");
9006 else if (unqualified_id == NULL_TREE && decl_context != PARM
9007 && decl_context != CATCHPARM
9008 && TREE_CODE (type) != UNION_TYPE
9011 error ("abstract declarator %qT used as declaration", type);
9012 return error_mark_node;
9015 /* Only functions may be declared using an operator-function-id. */
9017 && IDENTIFIER_OPNAME_P (unqualified_id)
9018 && TREE_CODE (type) != FUNCTION_TYPE
9019 && TREE_CODE (type) != METHOD_TYPE)
9021 error ("declaration of %qD as non-function", unqualified_id);
9022 return error_mark_node;
9025 /* We don't check parameter types here because we can emit a better
9026 error message later. */
9027 if (decl_context != PARM)
9029 type = check_var_type (unqualified_id, type);
9030 if (type == error_mark_node)
9031 return error_mark_node;
9034 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9035 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9037 if (decl_context == PARM || decl_context == CATCHPARM)
9039 if (ctype || in_namespace)
9040 error ("cannot use %<::%> in parameter declaration");
9042 /* A parameter declared as an array of T is really a pointer to T.
9043 One declared as a function is really a pointer to a function.
9044 One declared as a member is really a pointer to member. */
9046 if (TREE_CODE (type) == ARRAY_TYPE)
9048 /* Transfer const-ness of array into that of type pointed to. */
9049 type = build_pointer_type (TREE_TYPE (type));
9050 type_quals = TYPE_UNQUALIFIED;
9052 else if (TREE_CODE (type) == FUNCTION_TYPE)
9053 type = build_pointer_type (type);
9059 if (decl_context == PARM)
9061 decl = cp_build_parm_decl (unqualified_id, type);
9063 bad_specifiers (decl, "parameter", virtualp,
9064 memfn_quals != TYPE_UNQUALIFIED,
9065 inlinep, friendp, raises != NULL_TREE);
9067 else if (decl_context == FIELD)
9069 /* The C99 flexible array extension. */
9070 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9071 && TYPE_DOMAIN (type) == NULL_TREE)
9073 tree itype = compute_array_index_type (dname, integer_zero_node);
9074 type = build_cplus_array_type (TREE_TYPE (type), itype);
9077 if (type == error_mark_node)
9079 /* Happens when declaring arrays of sizes which
9080 are error_mark_node, for example. */
9083 else if (in_namespace && !friendp)
9085 /* Something like struct S { int N::j; }; */
9086 error ("invalid use of %<::%>");
9087 return error_mark_node;
9089 else if (TREE_CODE (type) == FUNCTION_TYPE)
9092 tree function_context;
9096 if (ctype == NULL_TREE)
9097 ctype = current_class_type;
9099 if (ctype == NULL_TREE)
9101 error ("can't make %qD into a method -- not in a class",
9103 return error_mark_node;
9106 /* ``A union may [ ... ] not [ have ] virtual functions.''
9108 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9110 error ("function %qD declared virtual inside a union",
9112 return error_mark_node;
9115 if (NEW_DELETE_OPNAME_P (unqualified_id))
9119 error ("%qD cannot be declared virtual, since it "
9125 else if (staticp < 2)
9126 type = build_memfn_type (type, ctype, memfn_quals);
9129 /* Check that the name used for a destructor makes sense. */
9130 if (sfk == sfk_destructor)
9132 tree uqname = id_declarator->u.id.unqualified_name;
9136 gcc_assert (friendp);
9137 error ("expected qualified name in friend declaration "
9138 "for destructor %qD", uqname);
9139 return error_mark_node;
9142 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9144 error ("declaration of %qD as member of %qT",
9146 return error_mark_node;
9149 else if (sfk == sfk_constructor && friendp)
9151 error ("expected qualified name in friend declaration "
9152 "for constructor %qD",
9153 id_declarator->u.id.unqualified_name);
9154 return error_mark_node;
9157 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9158 function_context = (ctype != NULL_TREE) ?
9159 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9160 publicp = (! friendp || ! staticp)
9161 && function_context == NULL_TREE;
9162 decl = grokfndecl (ctype, type,
9163 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9164 ? unqualified_id : dname,
9167 virtualp, flags, memfn_quals, raises,
9168 friendp ? -1 : 0, friendp, publicp, inlinep,
9170 funcdef_flag, template_count, in_namespace,
9171 attrlist, declarator->id_loc);
9172 if (decl == NULL_TREE)
9173 return error_mark_node;
9175 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9176 /* The decl and setting of decl_attr is also turned off. */
9177 decl = build_decl_attribute_variant (decl, decl_attr);
9180 /* [class.conv.ctor]
9182 A constructor declared without the function-specifier
9183 explicit that can be called with a single parameter
9184 specifies a conversion from the type of its first
9185 parameter to the type of its class. Such a constructor
9186 is called a converting constructor. */
9188 DECL_NONCONVERTING_P (decl) = 1;
9190 else if (TREE_CODE (type) == METHOD_TYPE)
9192 /* We only get here for friend declarations of
9193 members of other classes. */
9194 /* All method decls are public, so tell grokfndecl to set
9195 TREE_PUBLIC, also. */
9196 decl = grokfndecl (ctype, type,
9197 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9198 ? unqualified_id : dname,
9201 virtualp, flags, memfn_quals, raises,
9202 friendp ? -1 : 0, friendp, 1, 0, sfk,
9203 funcdef_flag, template_count, in_namespace,
9205 declarator->id_loc);
9206 if (decl == NULL_TREE)
9207 return error_mark_node;
9209 else if (!staticp && !dependent_type_p (type)
9210 && !COMPLETE_TYPE_P (complete_type (type))
9211 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9214 error ("field %qD has incomplete type", unqualified_id);
9216 error ("name %qT has incomplete type", type);
9218 /* If we're instantiating a template, tell them which
9219 instantiation made the field's type be incomplete. */
9220 if (current_class_type
9221 && TYPE_NAME (current_class_type)
9222 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9224 && declspecs->type == type)
9225 error (" in instantiation of template %qT",
9226 current_class_type);
9228 return error_mark_node;
9234 error ("%qE is neither function nor member function; "
9235 "cannot be declared friend", unqualified_id);
9243 /* Friends are treated specially. */
9244 if (ctype == current_class_type)
9245 ; /* We already issued a permerror. */
9246 else if (decl && DECL_NAME (decl))
9248 if (template_class_depth (current_class_type) == 0)
9250 decl = check_explicit_specialization
9251 (unqualified_id, decl, template_count,
9252 2 * funcdef_flag + 4);
9253 if (decl == error_mark_node)
9254 return error_mark_node;
9257 decl = do_friend (ctype, unqualified_id, decl,
9263 return error_mark_node;
9266 /* Structure field. It may not be a function, except for C++. */
9268 if (decl == NULL_TREE)
9274 /* An attempt is being made to initialize a non-static
9275 member. But, from [class.mem]:
9277 4 A member-declarator can contain a
9278 constant-initializer only if it declares a static
9279 member (_class.static_) of integral or enumeration
9280 type, see _class.static.data_.
9282 This used to be relatively common practice, but
9283 the rest of the compiler does not correctly
9284 handle the initialization unless the member is
9285 static so we make it static below. */
9286 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9288 permerror (input_location, "making %qD static", unqualified_id);
9292 if (uses_template_parms (type))
9293 /* We'll check at instantiation time. */
9295 else if (check_static_variable_definition (unqualified_id,
9297 /* If we just return the declaration, crashes
9298 will sometimes occur. We therefore return
9299 void_type_node, as if this was a friend
9300 declaration, to cause callers to completely
9301 ignore this declaration. */
9302 return error_mark_node;
9307 /* C++ allows static class members. All other work
9308 for this is done by grokfield. */
9309 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9310 set_linkage_for_static_data_member (decl);
9311 /* Even if there is an in-class initialization, DECL
9312 is considered undefined until an out-of-class
9313 definition is provided. */
9314 DECL_EXTERNAL (decl) = 1;
9317 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9321 decl = build_decl (input_location,
9322 FIELD_DECL, unqualified_id, type);
9323 DECL_NONADDRESSABLE_P (decl) = bitfield;
9324 if (bitfield && !unqualified_id)
9325 TREE_NO_WARNING (decl) = 1;
9327 if (storage_class == sc_mutable)
9329 DECL_MUTABLE_P (decl) = 1;
9330 storage_class = sc_none;
9334 bad_specifiers (decl, "field", virtualp,
9335 memfn_quals != TYPE_UNQUALIFIED,
9336 inlinep, friendp, raises != NULL_TREE);
9339 else if (TREE_CODE (type) == FUNCTION_TYPE
9340 || TREE_CODE (type) == METHOD_TYPE)
9345 if (!unqualified_id)
9346 return error_mark_node;
9348 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9349 original_name = dname;
9351 original_name = unqualified_id;
9353 if (storage_class == sc_auto)
9354 error ("storage class %<auto%> invalid for function %qs", name);
9355 else if (storage_class == sc_register)
9356 error ("storage class %<register%> invalid for function %qs", name);
9358 error ("storage class %<__thread%> invalid for function %qs", name);
9360 /* Function declaration not at top level.
9361 Storage classes other than `extern' are not allowed
9362 and `extern' makes no difference. */
9363 if (! toplevel_bindings_p ()
9364 && (storage_class == sc_static
9365 || declspecs->specs[(int)ds_inline])
9368 if (storage_class == sc_static)
9369 pedwarn (input_location, OPT_pedantic,
9370 "%<static%> specified invalid for function %qs "
9371 "declared out of global scope", name);
9373 pedwarn (input_location, OPT_pedantic,
9374 "%<inline%> specifier invalid for function %qs "
9375 "declared out of global scope", name);
9378 if (ctype != NULL_TREE
9379 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9381 error ("%q#T is not a class or a namespace", ctype);
9385 if (ctype == NULL_TREE)
9389 error ("virtual non-class function %qs", name);
9392 else if (sfk == sfk_constructor
9393 || sfk == sfk_destructor)
9396 ? "%qs defined in a non-class scope"
9397 : "%qs declared in a non-class scope", name);
9401 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9402 && !NEW_DELETE_OPNAME_P (original_name))
9403 type = build_method_type_directly (ctype,
9405 TYPE_ARG_TYPES (type));
9407 /* Record presence of `static'. */
9408 publicp = (ctype != NULL_TREE
9409 || storage_class == sc_extern
9410 || storage_class != sc_static);
9412 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9413 virtualp, flags, memfn_quals, raises,
9415 publicp, inlinep, sfk, funcdef_flag,
9416 template_count, in_namespace, attrlist,
9417 declarator->id_loc);
9418 if (decl == NULL_TREE)
9419 return error_mark_node;
9423 int invalid_static = 0;
9425 /* Don't allow a static member function in a class, and forbid
9426 declaring main to be static. */
9427 if (TREE_CODE (type) == METHOD_TYPE)
9429 permerror (input_location, "cannot declare member function %qD to have "
9430 "static linkage", decl);
9433 else if (current_function_decl)
9435 /* FIXME need arm citation */
9436 error ("cannot declare static function inside another function");
9443 storage_class = sc_none;
9449 /* It's a variable. */
9451 /* An uninitialized decl with `extern' is a reference. */
9452 decl = grokvardecl (type, unqualified_id,
9455 (type_quals & TYPE_QUAL_CONST) != 0,
9456 ctype ? ctype : in_namespace);
9457 bad_specifiers (decl, "variable", virtualp,
9458 memfn_quals != TYPE_UNQUALIFIED,
9459 inlinep, friendp, raises != NULL_TREE);
9463 DECL_CONTEXT (decl) = ctype;
9466 permerror (input_location, "%<static%> may not be used when defining "
9467 "(as opposed to declaring) a static data member");
9469 storage_class = sc_none;
9471 if (storage_class == sc_register && TREE_STATIC (decl))
9473 error ("static member %qD declared %<register%>", decl);
9474 storage_class = sc_none;
9476 if (storage_class == sc_extern && pedantic)
9478 pedwarn (input_location, OPT_pedantic,
9479 "cannot explicitly declare member %q#D to have "
9480 "extern linkage", decl);
9481 storage_class = sc_none;
9486 if (storage_class == sc_extern && initialized && !funcdef_flag)
9488 if (toplevel_bindings_p ())
9490 /* It's common practice (and completely valid) to have a const
9491 be initialized and declared extern. */
9492 if (!(type_quals & TYPE_QUAL_CONST))
9493 warning (0, "%qs initialized and declared %<extern%>", name);
9497 error ("%qs has both %<extern%> and initializer", name);
9498 return error_mark_node;
9502 /* Record `register' declaration for warnings on &
9503 and in case doing stupid register allocation. */
9505 if (storage_class == sc_register)
9506 DECL_REGISTER (decl) = 1;
9507 else if (storage_class == sc_extern)
9508 DECL_THIS_EXTERN (decl) = 1;
9509 else if (storage_class == sc_static)
9510 DECL_THIS_STATIC (decl) = 1;
9512 /* Record constancy and volatility on the DECL itself . There's
9513 no need to do this when processing a template; we'll do this
9514 for the instantiated declaration based on the type of DECL. */
9515 if (!processing_template_decl)
9516 cp_apply_type_quals_to_decl (type_quals, decl);
9519 TREE_NO_WARNING (decl) = 1;
9525 /* Subroutine of start_function. Ensure that each of the parameter
9526 types (as listed in PARMS) is complete, as is required for a
9527 function definition. */
9530 require_complete_types_for_parms (tree parms)
9532 for (; parms; parms = TREE_CHAIN (parms))
9534 if (dependent_type_p (TREE_TYPE (parms)))
9536 if (!VOID_TYPE_P (TREE_TYPE (parms))
9537 && complete_type_or_else (TREE_TYPE (parms), parms))
9539 relayout_decl (parms);
9540 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9543 /* grokparms or complete_type_or_else will have already issued
9545 TREE_TYPE (parms) = error_mark_node;
9549 /* Returns nonzero if T is a local variable. */
9552 local_variable_p (const_tree t)
9554 if ((TREE_CODE (t) == VAR_DECL
9555 /* A VAR_DECL with a context that is a _TYPE is a static data
9557 && !TYPE_P (CP_DECL_CONTEXT (t))
9558 /* Any other non-local variable must be at namespace scope. */
9559 && !DECL_NAMESPACE_SCOPE_P (t))
9560 || (TREE_CODE (t) == PARM_DECL))
9566 /* Like local_variable_p, but suitable for use as a tree-walking
9570 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9571 void *data ATTRIBUTE_UNUSED)
9573 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9575 else if (TYPE_P (*tp))
9582 /* Check that ARG, which is a default-argument expression for a
9583 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9584 something goes wrong. DECL may also be a _TYPE node, rather than a
9585 DECL, if there is no DECL available. */
9588 check_default_argument (tree decl, tree arg)
9593 if (TREE_CODE (arg) == DEFAULT_ARG)
9594 /* We get a DEFAULT_ARG when looking at an in-class declaration
9595 with a default argument. Ignore the argument for now; we'll
9596 deal with it after the class is complete. */
9605 decl_type = TREE_TYPE (decl);
9607 if (arg == error_mark_node
9608 || decl == error_mark_node
9609 || TREE_TYPE (arg) == error_mark_node
9610 || decl_type == error_mark_node)
9611 /* Something already went wrong. There's no need to check
9613 return error_mark_node;
9615 /* [dcl.fct.default]
9617 A default argument expression is implicitly converted to the
9619 if (!TREE_TYPE (arg)
9620 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9623 error ("default argument for %q#D has type %qT",
9624 decl, TREE_TYPE (arg));
9626 error ("default argument for parameter of type %qT has type %qT",
9627 decl_type, TREE_TYPE (arg));
9629 return error_mark_node;
9632 /* [dcl.fct.default]
9634 Local variables shall not be used in default argument
9637 The keyword `this' shall not be used in a default argument of a
9639 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9642 error ("default argument %qE uses local variable %qD", arg, var);
9643 return error_mark_node;
9650 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9653 type_is_deprecated (tree type)
9655 enum tree_code code;
9656 if (TREE_DEPRECATED (type))
9658 if (TYPE_NAME (type)
9659 && TREE_DEPRECATED (TYPE_NAME (type)))
9662 code = TREE_CODE (type);
9664 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9665 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9666 || code == METHOD_TYPE || code == ARRAY_TYPE)
9667 return type_is_deprecated (TREE_TYPE (type));
9669 if (TYPE_PTRMEMFUNC_P (type))
9670 return type_is_deprecated
9671 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9676 /* Decode the list of parameter types for a function type.
9677 Given the list of things declared inside the parens,
9678 return a list of types.
9680 If this parameter does not end with an ellipsis, we append
9683 *PARMS is set to the chain of PARM_DECLs created. */
9686 grokparms (tree parmlist, tree *parms)
9688 tree result = NULL_TREE;
9689 tree decls = NULL_TREE;
9693 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9695 tree type = NULL_TREE;
9696 tree init = TREE_PURPOSE (parm);
9697 tree decl = TREE_VALUE (parm);
9700 if (parm == void_list_node)
9703 if (! decl || TREE_TYPE (decl) == error_mark_node)
9706 type = TREE_TYPE (decl);
9707 if (VOID_TYPE_P (type))
9709 if (same_type_p (type, void_type_node)
9710 && DECL_SELF_REFERENCE_P (type)
9711 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9712 /* this is a parmlist of `(void)', which is ok. */
9714 cxx_incomplete_type_error (decl, type);
9715 /* It's not a good idea to actually create parameters of
9716 type `void'; other parts of the compiler assume that a
9717 void type terminates the parameter list. */
9718 type = error_mark_node;
9719 TREE_TYPE (decl) = error_mark_node;
9722 if (type != error_mark_node
9723 && TYPE_FOR_JAVA (type)
9724 && MAYBE_CLASS_TYPE_P (type))
9726 error ("parameter %qD has Java class type", decl);
9727 type = error_mark_node;
9728 TREE_TYPE (decl) = error_mark_node;
9732 if (type != error_mark_node
9733 && (errmsg = targetm.invalid_parameter_type (type)))
9736 type = error_mark_node;
9737 TREE_TYPE (decl) = error_mark_node;
9740 if (type != error_mark_node)
9742 if (deprecated_state != DEPRECATED_SUPPRESS)
9744 tree deptype = type_is_deprecated (type);
9746 warn_deprecated_use (deptype, NULL_TREE);
9749 /* Top-level qualifiers on the parameters are
9750 ignored for function types. */
9751 type = cp_build_qualified_type (type, 0);
9752 if (TREE_CODE (type) == METHOD_TYPE)
9754 error ("parameter %qD invalidly declared method type", decl);
9755 type = build_pointer_type (type);
9756 TREE_TYPE (decl) = type;
9758 else if (abstract_virtuals_error (decl, type))
9759 any_error = 1; /* Seems like a good idea. */
9760 else if (POINTER_TYPE_P (type))
9762 /* [dcl.fct]/6, parameter types cannot contain pointers
9763 (references) to arrays of unknown bound. */
9764 tree t = TREE_TYPE (type);
9765 int ptr = TYPE_PTR_P (type);
9771 else if (TREE_CODE (t) != ARRAY_TYPE)
9773 else if (!TYPE_DOMAIN (t))
9777 if (TREE_CODE (t) == ARRAY_TYPE)
9778 error ("parameter %qD includes %s to array of unknown "
9780 decl, ptr ? "pointer" : "reference", t);
9785 else if (init && !processing_template_decl)
9786 init = check_default_argument (decl, init);
9789 if (TREE_CODE (decl) == PARM_DECL
9790 && FUNCTION_PARAMETER_PACK_P (decl)
9791 && TREE_CHAIN (parm)
9792 && TREE_CHAIN (parm) != void_list_node)
9793 error ("parameter packs must be at the end of the parameter list");
9795 TREE_CHAIN (decl) = decls;
9797 result = tree_cons (init, type, result);
9799 decls = nreverse (decls);
9800 result = nreverse (result);
9802 result = chainon (result, void_list_node);
9809 /* D is a constructor or overloaded `operator='.
9811 Let T be the class in which D is declared. Then, this function
9814 -1 if D's is an ill-formed constructor or copy assignment operator
9815 whose first parameter is of type `T'.
9816 0 if D is not a copy constructor or copy assignment
9818 1 if D is a copy constructor or copy assignment operator whose
9819 first parameter is a reference to const qualified T.
9820 2 if D is a copy constructor or copy assignment operator whose
9821 first parameter is a reference to non-const qualified T.
9823 This function can be used as a predicate. Positive values indicate
9824 a copy constructor and nonzero values indicate a copy assignment
9828 copy_fn_p (const_tree d)
9834 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9836 if (TREE_CODE (d) == TEMPLATE_DECL
9837 || (DECL_TEMPLATE_INFO (d)
9838 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9839 /* Instantiations of template member functions are never copy
9840 functions. Note that member functions of templated classes are
9841 represented as template functions internally, and we must
9842 accept those as copy functions. */
9845 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9849 arg_type = TREE_VALUE (args);
9850 if (arg_type == error_mark_node)
9853 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9855 /* Pass by value copy assignment operator. */
9858 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9859 && !TYPE_REF_IS_RVALUE (arg_type)
9860 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9862 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9868 args = TREE_CHAIN (args);
9870 if (args && args != void_list_node && !TREE_PURPOSE (args))
9871 /* There are more non-optional args. */
9877 /* D is a constructor or overloaded `operator='.
9879 Let T be the class in which D is declared. Then, this function
9880 returns true when D is a move constructor or move assignment
9881 operator, false otherwise. */
9884 move_fn_p (const_tree d)
9888 bool result = false;
9890 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9892 if (cxx_dialect == cxx98)
9893 /* There are no move constructors if we are in C++98 mode. */
9896 if (TREE_CODE (d) == TEMPLATE_DECL
9897 || (DECL_TEMPLATE_INFO (d)
9898 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9899 /* Instantiations of template member functions are never copy
9900 functions. Note that member functions of templated classes are
9901 represented as template functions internally, and we must
9902 accept those as copy functions. */
9905 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9909 arg_type = TREE_VALUE (args);
9910 if (arg_type == error_mark_node)
9913 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9914 && TYPE_REF_IS_RVALUE (arg_type)
9915 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9919 args = TREE_CHAIN (args);
9921 if (args && args != void_list_node && !TREE_PURPOSE (args))
9922 /* There are more non-optional args. */
9928 /* Remember any special properties of member function DECL. */
9931 grok_special_member_properties (tree decl)
9935 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9938 class_type = DECL_CONTEXT (decl);
9939 if (DECL_CONSTRUCTOR_P (decl))
9941 int ctor = copy_fn_p (decl);
9943 if (!DECL_ARTIFICIAL (decl))
9944 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9950 A non-template constructor for class X is a copy
9951 constructor if its first parameter is of type X&, const
9952 X&, volatile X& or const volatile X&, and either there
9953 are no other parameters or else all other parameters have
9954 default arguments. */
9955 TYPE_HAS_INIT_REF (class_type) = 1;
9956 if (!DECL_DEFAULTED_FN (decl))
9957 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9959 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9961 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9963 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9964 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9965 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9967 else if (is_list_ctor (decl))
9968 TYPE_HAS_LIST_CTOR (class_type) = 1;
9970 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9974 A non-template assignment operator for class X is a copy
9975 assignment operator if its parameter is of type X, X&, const
9976 X&, volatile X& or const volatile X&. */
9978 int assop = copy_fn_p (decl);
9982 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9983 if (!DECL_DEFAULTED_FN (decl))
9984 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9986 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9991 /* Check a constructor DECL has the correct form. Complains
9992 if the class has a constructor of the form X(X). */
9995 grok_ctor_properties (const_tree ctype, const_tree decl)
9997 int ctor_parm = copy_fn_p (decl);
10003 A declaration of a constructor for a class X is ill-formed if
10004 its first parameter is of type (optionally cv-qualified) X
10005 and either there are no other parameters or else all other
10006 parameters have default arguments.
10008 We *don't* complain about member template instantiations that
10009 have this form, though; they can occur as we try to decide
10010 what constructor to use during overload resolution. Since
10011 overload resolution will never prefer such a constructor to
10012 the non-template copy constructor (which is either explicitly
10013 or implicitly defined), there's no need to worry about their
10014 existence. Theoretically, they should never even be
10015 instantiated, but that's hard to forestall. */
10016 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10024 /* An operator with this code is unary, but can also be binary. */
10027 ambi_op_p (enum tree_code code)
10029 return (code == INDIRECT_REF
10030 || code == ADDR_EXPR
10031 || code == UNARY_PLUS_EXPR
10032 || code == NEGATE_EXPR
10033 || code == PREINCREMENT_EXPR
10034 || code == PREDECREMENT_EXPR);
10037 /* An operator with this name can only be unary. */
10040 unary_op_p (enum tree_code code)
10042 return (code == TRUTH_NOT_EXPR
10043 || code == BIT_NOT_EXPR
10044 || code == COMPONENT_REF
10045 || code == TYPE_EXPR);
10048 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10049 errors are issued for invalid declarations. */
10052 grok_op_properties (tree decl, bool complain)
10054 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10056 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10057 tree name = DECL_NAME (decl);
10058 enum tree_code operator_code;
10063 /* Count the number of arguments and check for ellipsis. */
10064 for (argtype = argtypes, arity = 0;
10065 argtype && argtype != void_list_node;
10066 argtype = TREE_CHAIN (argtype))
10068 ellipsis_p = !argtype;
10070 class_type = DECL_CONTEXT (decl);
10071 if (class_type && !CLASS_TYPE_P (class_type))
10072 class_type = NULL_TREE;
10074 if (DECL_CONV_FN_P (decl))
10075 operator_code = TYPE_EXPR;
10079 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10080 if (ansi_opname (CODE) == name) \
10082 operator_code = (CODE); \
10085 else if (ansi_assopname (CODE) == name) \
10087 operator_code = (CODE); \
10088 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10092 #include "operators.def"
10093 #undef DEF_OPERATOR
10095 gcc_unreachable ();
10098 gcc_assert (operator_code != MAX_TREE_CODES);
10099 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10102 switch (operator_code)
10105 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10109 TYPE_GETS_DELETE (class_type) |= 1;
10113 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10116 case VEC_DELETE_EXPR:
10117 TYPE_GETS_DELETE (class_type) |= 2;
10124 /* [basic.std.dynamic.allocation]/1:
10126 A program is ill-formed if an allocation function is declared
10127 in a namespace scope other than global scope or declared static
10130 The same also holds true for deallocation functions. */
10131 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10132 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10134 if (DECL_NAMESPACE_SCOPE_P (decl))
10136 if (CP_DECL_CONTEXT (decl) != global_namespace)
10138 error ("%qD may not be declared within a namespace", decl);
10141 else if (!TREE_PUBLIC (decl))
10143 error ("%qD may not be declared as static", decl);
10149 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10151 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10152 DECL_IS_OPERATOR_NEW (decl) = 1;
10154 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10155 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10158 /* An operator function must either be a non-static member function
10159 or have at least one parameter of a class, a reference to a class,
10160 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10161 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10163 if (operator_code == TYPE_EXPR
10164 || operator_code == CALL_EXPR
10165 || operator_code == COMPONENT_REF
10166 || operator_code == ARRAY_REF
10167 || operator_code == NOP_EXPR)
10169 error ("%qD must be a nonstatic member function", decl);
10176 if (DECL_STATIC_FUNCTION_P (decl))
10178 error ("%qD must be either a non-static member "
10179 "function or a non-member function", decl);
10183 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10185 tree arg = non_reference (TREE_VALUE (p));
10186 if (arg == error_mark_node)
10189 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10190 because these checks are performed even on
10191 template functions. */
10192 if (MAYBE_CLASS_TYPE_P (arg)
10193 || TREE_CODE (arg) == ENUMERAL_TYPE)
10197 if (!p || p == void_list_node)
10200 error ("%qD must have an argument of class or "
10201 "enumerated type", decl);
10207 /* There are no restrictions on the arguments to an overloaded
10209 if (operator_code == CALL_EXPR)
10212 /* Warn about conversion operators that will never be used. */
10213 if (IDENTIFIER_TYPENAME_P (name)
10214 && ! DECL_TEMPLATE_INFO (decl)
10216 /* Warn only declaring the function; there is no need to
10217 warn again about out-of-class definitions. */
10218 && class_type == current_class_type)
10220 tree t = TREE_TYPE (name);
10221 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10222 const char *what = 0;
10225 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10227 if (TREE_CODE (t) == VOID_TYPE)
10229 else if (class_type)
10231 if (t == class_type)
10232 what = "the same type";
10233 /* Don't force t to be complete here. */
10234 else if (MAYBE_CLASS_TYPE_P (t)
10235 && COMPLETE_TYPE_P (t)
10236 && DERIVED_FROM_P (t, class_type))
10237 what = "a base class";
10241 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10242 "conversion operator",
10243 ref ? "a reference to " : "", what);
10246 if (operator_code == COND_EXPR)
10249 error ("ISO C++ prohibits overloading operator ?:");
10252 else if (ellipsis_p)
10254 error ("%qD must not have variable number of arguments", decl);
10257 else if (ambi_op_p (operator_code))
10260 /* We pick the one-argument operator codes by default, so
10261 we don't have to change anything. */
10263 else if (arity == 2)
10265 /* If we thought this was a unary operator, we now know
10266 it to be a binary operator. */
10267 switch (operator_code)
10270 operator_code = MULT_EXPR;
10274 operator_code = BIT_AND_EXPR;
10277 case UNARY_PLUS_EXPR:
10278 operator_code = PLUS_EXPR;
10282 operator_code = MINUS_EXPR;
10285 case PREINCREMENT_EXPR:
10286 operator_code = POSTINCREMENT_EXPR;
10289 case PREDECREMENT_EXPR:
10290 operator_code = POSTDECREMENT_EXPR;
10294 gcc_unreachable ();
10297 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10299 if ((operator_code == POSTINCREMENT_EXPR
10300 || operator_code == POSTDECREMENT_EXPR)
10301 && ! processing_template_decl
10302 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10305 error ("postfix %qD must take %<int%> as its argument",
10308 error ("postfix %qD must take %<int%> as its second "
10316 error ("%qD must take either zero or one argument", decl);
10318 error ("%qD must take either one or two arguments", decl);
10322 /* More Effective C++ rule 6. */
10324 && (operator_code == POSTINCREMENT_EXPR
10325 || operator_code == POSTDECREMENT_EXPR
10326 || operator_code == PREINCREMENT_EXPR
10327 || operator_code == PREDECREMENT_EXPR))
10329 tree arg = TREE_VALUE (argtypes);
10330 tree ret = TREE_TYPE (TREE_TYPE (decl));
10331 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10332 arg = TREE_TYPE (arg);
10333 arg = TYPE_MAIN_VARIANT (arg);
10334 if (operator_code == PREINCREMENT_EXPR
10335 || operator_code == PREDECREMENT_EXPR)
10337 if (TREE_CODE (ret) != REFERENCE_TYPE
10338 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10340 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10341 build_reference_type (arg));
10345 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10346 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10350 else if (unary_op_p (operator_code))
10355 error ("%qD must take %<void%>", decl);
10357 error ("%qD must take exactly one argument", decl);
10361 else /* if (binary_op_p (operator_code)) */
10366 error ("%qD must take exactly one argument", decl);
10368 error ("%qD must take exactly two arguments", decl);
10372 /* More Effective C++ rule 7. */
10374 && (operator_code == TRUTH_ANDIF_EXPR
10375 || operator_code == TRUTH_ORIF_EXPR
10376 || operator_code == COMPOUND_EXPR))
10377 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10381 /* Effective C++ rule 23. */
10384 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10385 && (operator_code == PLUS_EXPR
10386 || operator_code == MINUS_EXPR
10387 || operator_code == TRUNC_DIV_EXPR
10388 || operator_code == MULT_EXPR
10389 || operator_code == TRUNC_MOD_EXPR)
10390 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10391 warning (OPT_Weffc__, "%qD should return by value", decl);
10393 /* [over.oper]/8 */
10394 for (; argtypes && argtypes != void_list_node;
10395 argtypes = TREE_CHAIN (argtypes))
10396 if (TREE_PURPOSE (argtypes))
10398 TREE_PURPOSE (argtypes) = NULL_TREE;
10399 if (operator_code == POSTINCREMENT_EXPR
10400 || operator_code == POSTDECREMENT_EXPR)
10402 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10407 error ("%qD cannot have default arguments", decl);
10415 /* Return a string giving the keyword associate with CODE. */
10417 static const char *
10418 tag_name (enum tag_types code)
10430 case typename_type:
10433 gcc_unreachable ();
10437 /* Name lookup in an elaborated-type-specifier (after the keyword
10438 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10439 elaborated-type-specifier is invalid, issue a diagnostic and return
10440 error_mark_node; otherwise, return the *_TYPE to which it referred.
10441 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10444 check_elaborated_type_specifier (enum tag_types tag_code,
10446 bool allow_template_p)
10452 struct S { struct S *p; };
10454 name lookup will find the TYPE_DECL for the implicit "S::S"
10455 typedef. Adjust for that here. */
10456 if (DECL_SELF_REFERENCE_P (decl))
10457 decl = TYPE_NAME (TREE_TYPE (decl));
10459 type = TREE_TYPE (decl);
10461 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10462 is false for this case as well. */
10463 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10465 error ("using template type parameter %qT after %qs",
10466 type, tag_name (tag_code));
10467 return error_mark_node;
10471 If the identifier resolves to a typedef-name or a template
10472 type-parameter, the elaborated-type-specifier is ill-formed.
10474 In other words, the only legitimate declaration to use in the
10475 elaborated type specifier is the implicit typedef created when
10476 the type is declared. */
10477 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10478 && tag_code != typename_type)
10480 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10481 error ("%q+D has a previous declaration here", decl);
10482 return error_mark_node;
10484 else if (TREE_CODE (type) != RECORD_TYPE
10485 && TREE_CODE (type) != UNION_TYPE
10486 && tag_code != enum_type
10487 && tag_code != typename_type)
10489 error ("%qT referred to as %qs", type, tag_name (tag_code));
10490 error ("%q+T has a previous declaration here", type);
10491 return error_mark_node;
10493 else if (TREE_CODE (type) != ENUMERAL_TYPE
10494 && tag_code == enum_type)
10496 error ("%qT referred to as enum", type);
10497 error ("%q+T has a previous declaration here", type);
10498 return error_mark_node;
10500 else if (!allow_template_p
10501 && TREE_CODE (type) == RECORD_TYPE
10502 && CLASSTYPE_IS_TEMPLATE (type))
10504 /* If a class template appears as elaborated type specifier
10505 without a template header such as:
10507 template <class T> class C {};
10508 void f(class C); // No template header here
10510 then the required template argument is missing. */
10511 error ("template argument required for %<%s %T%>",
10512 tag_name (tag_code),
10513 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10514 return error_mark_node;
10520 /* Lookup NAME in elaborate type specifier in scope according to
10521 SCOPE and issue diagnostics if necessary.
10522 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10523 found, and ERROR_MARK_NODE for type error. */
10526 lookup_and_check_tag (enum tag_types tag_code, tree name,
10527 tag_scope scope, bool template_header_p)
10531 if (scope == ts_global)
10533 /* First try ordinary name lookup, ignoring hidden class name
10534 injected via friend declaration. */
10535 decl = lookup_name_prefer_type (name, 2);
10536 /* If that fails, the name will be placed in the smallest
10537 non-class, non-function-prototype scope according to 3.3.1/5.
10538 We may already have a hidden name declared as friend in this
10539 scope. So lookup again but not ignoring hidden names.
10540 If we find one, that name will be made visible rather than
10541 creating a new tag. */
10543 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10546 decl = lookup_type_scope (name, scope);
10548 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10549 decl = DECL_TEMPLATE_RESULT (decl);
10551 if (decl && TREE_CODE (decl) == TYPE_DECL)
10553 /* Look for invalid nested type:
10557 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10559 error ("%qD has the same name as the class in which it is "
10562 return error_mark_node;
10565 /* Two cases we need to consider when deciding if a class
10566 template is allowed as an elaborated type specifier:
10567 1. It is a self reference to its own class.
10568 2. It comes with a template header.
10572 template <class T> class C {
10573 class C *c1; // DECL_SELF_REFERENCE_P is true
10576 template <class U> class C; // template_header_p is true
10577 template <class T> class C<T>::D {
10578 class C *c2; // DECL_SELF_REFERENCE_P is true
10581 t = check_elaborated_type_specifier (tag_code,
10584 | DECL_SELF_REFERENCE_P (decl));
10587 else if (decl && TREE_CODE (decl) == TREE_LIST)
10589 error ("reference to %qD is ambiguous", name);
10590 print_candidates (decl);
10591 return error_mark_node;
10597 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10598 Define the tag as a forward-reference if it is not defined.
10600 If a declaration is given, process it here, and report an error if
10601 multiple declarations are not identical.
10603 SCOPE is TS_CURRENT when this is also a definition. Only look in
10604 the current frame for the name (since C++ allows new names in any
10605 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10606 declaration. Only look beginning from the current scope outward up
10607 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10609 TEMPLATE_HEADER_P is true when this declaration is preceded by
10610 a set of template parameters. */
10613 xref_tag (enum tag_types tag_code, tree name,
10614 tag_scope scope, bool template_header_p)
10616 enum tree_code code;
10618 tree context = NULL_TREE;
10620 timevar_push (TV_NAME_LOOKUP);
10622 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10628 code = RECORD_TYPE;
10634 code = ENUMERAL_TYPE;
10637 gcc_unreachable ();
10640 /* In case of anonymous name, xref_tag is only called to
10641 make type node and push name. Name lookup is not required. */
10642 if (ANON_AGGRNAME_P (name))
10645 t = lookup_and_check_tag (tag_code, name,
10646 scope, template_header_p);
10648 if (t == error_mark_node)
10649 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10651 if (scope != ts_current && t && current_class_type
10652 && template_class_depth (current_class_type)
10653 && template_header_p)
10655 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10656 definition of this tag. Since, in addition, we are currently
10657 processing a (member) template declaration of a template
10658 class, we must be very careful; consider:
10665 { template <class V>
10666 friend struct S1; };
10668 Here, the S2::S1 declaration should not be confused with the
10669 outer declaration. In particular, the inner version should
10670 have a template parameter of level 2, not level 1. This
10671 would be particularly important if the member declaration
10674 template <class V = U> friend struct S1;
10676 say, when we should tsubst into `U' when instantiating
10677 S2. On the other hand, when presented with:
10687 we must find the inner binding eventually. We
10688 accomplish this by making sure that the new type we
10689 create to represent this declaration has the right
10691 context = TYPE_CONTEXT (t);
10697 /* If no such tag is yet defined, create a forward-reference node
10698 and record it as the "definition".
10699 When a real declaration of this type is found,
10700 the forward-reference will be altered into a real type. */
10701 if (code == ENUMERAL_TYPE)
10703 error ("use of enum %q#D without previous declaration", name);
10704 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10708 t = make_class_type (code);
10709 TYPE_CONTEXT (t) = context;
10710 t = pushtag (name, t, scope);
10715 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10717 if (!redeclare_class_template (t, current_template_parms))
10718 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10720 else if (!processing_template_decl
10721 && CLASS_TYPE_P (t)
10722 && CLASSTYPE_IS_TEMPLATE (t))
10724 error ("redeclaration of %qT as a non-template", t);
10725 error ("previous declaration %q+D", t);
10726 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10729 /* Make injected friend class visible. */
10730 if (scope != ts_within_enclosing_non_class
10731 && hidden_name_p (TYPE_NAME (t)))
10733 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10734 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10736 if (TYPE_TEMPLATE_INFO (t))
10738 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10739 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10744 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10748 xref_tag_from_type (tree old, tree id, tag_scope scope)
10750 enum tag_types tag_kind;
10752 if (TREE_CODE (old) == RECORD_TYPE)
10753 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10755 tag_kind = union_type;
10757 if (id == NULL_TREE)
10758 id = TYPE_IDENTIFIER (old);
10760 return xref_tag (tag_kind, id, scope, false);
10763 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10764 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10765 access_* node, and the TREE_VALUE is the type of the base-class.
10766 Non-NULL TREE_TYPE indicates virtual inheritance.
10768 Returns true if the binfo hierarchy was successfully created,
10769 false if an error was detected. */
10772 xref_basetypes (tree ref, tree base_list)
10775 tree binfo, base_binfo;
10776 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10777 unsigned max_bases = 0; /* Maximum direct bases. */
10779 tree default_access;
10780 tree igo_prev; /* Track Inheritance Graph Order. */
10782 if (ref == error_mark_node)
10785 /* The base of a derived class is private by default, all others are
10787 default_access = (TREE_CODE (ref) == RECORD_TYPE
10788 && CLASSTYPE_DECLARED_CLASS (ref)
10789 ? access_private_node : access_public_node);
10791 /* First, make sure that any templates in base-classes are
10792 instantiated. This ensures that if we call ourselves recursively
10793 we do not get confused about which classes are marked and which
10795 basep = &base_list;
10798 tree basetype = TREE_VALUE (*basep);
10800 if (!(processing_template_decl && uses_template_parms (basetype))
10801 && !complete_type_or_else (basetype, NULL))
10802 /* An incomplete type. Remove it from the list. */
10803 *basep = TREE_CHAIN (*basep);
10807 if (TREE_TYPE (*basep))
10809 if (CLASS_TYPE_P (basetype))
10810 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10811 basep = &TREE_CHAIN (*basep);
10815 TYPE_MARKED_P (ref) = 1;
10817 /* The binfo slot should be empty, unless this is an (ill-formed)
10819 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10820 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10822 binfo = make_tree_binfo (max_bases);
10824 TYPE_BINFO (ref) = binfo;
10825 BINFO_OFFSET (binfo) = size_zero_node;
10826 BINFO_TYPE (binfo) = ref;
10828 /* Apply base-class info set up to the variants of this type. */
10829 fixup_type_variants (ref);
10833 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10834 /* An aggregate cannot have baseclasses. */
10835 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10837 if (TREE_CODE (ref) == UNION_TYPE)
10839 error ("derived union %qT invalid", ref);
10846 if (TYPE_FOR_JAVA (ref))
10848 error ("Java class %qT cannot have multiple bases", ref);
10855 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10857 if (TYPE_FOR_JAVA (ref))
10859 error ("Java class %qT cannot have virtual bases", ref);
10864 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10866 tree access = TREE_PURPOSE (base_list);
10867 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10868 tree basetype = TREE_VALUE (base_list);
10870 if (access == access_default_node)
10871 access = default_access;
10873 if (PACK_EXPANSION_P (basetype))
10874 basetype = PACK_EXPANSION_PATTERN (basetype);
10875 if (TREE_CODE (basetype) == TYPE_DECL)
10876 basetype = TREE_TYPE (basetype);
10877 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10879 error ("base type %qT fails to be a struct or class type",
10884 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10885 TYPE_FOR_JAVA (ref) = 1;
10887 base_binfo = NULL_TREE;
10888 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10890 base_binfo = TYPE_BINFO (basetype);
10891 /* The original basetype could have been a typedef'd type. */
10892 basetype = BINFO_TYPE (base_binfo);
10894 /* Inherit flags from the base. */
10895 TYPE_HAS_NEW_OPERATOR (ref)
10896 |= TYPE_HAS_NEW_OPERATOR (basetype);
10897 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10898 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10899 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10900 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10901 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10902 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10903 CLASSTYPE_REPEATED_BASE_P (ref)
10904 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10907 /* We must do this test after we've seen through a typedef
10909 if (TYPE_MARKED_P (basetype))
10911 if (basetype == ref)
10912 error ("recursive type %qT undefined", basetype);
10914 error ("duplicate base type %qT invalid", basetype);
10918 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10919 /* Regenerate the pack expansion for the bases. */
10920 basetype = make_pack_expansion (basetype);
10922 TYPE_MARKED_P (basetype) = 1;
10924 base_binfo = copy_binfo (base_binfo, basetype, ref,
10925 &igo_prev, via_virtual);
10926 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10927 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10929 BINFO_BASE_APPEND (binfo, base_binfo);
10930 BINFO_BASE_ACCESS_APPEND (binfo, access);
10933 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10934 /* If we have space in the vbase vector, we must have shared at
10935 least one of them, and are therefore diamond shaped. */
10936 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10938 /* Unmark all the types. */
10939 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10940 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10941 TYPE_MARKED_P (ref) = 0;
10943 /* Now see if we have a repeated base type. */
10944 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10946 for (base_binfo = binfo; base_binfo;
10947 base_binfo = TREE_CHAIN (base_binfo))
10949 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10951 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10954 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10956 for (base_binfo = binfo; base_binfo;
10957 base_binfo = TREE_CHAIN (base_binfo))
10958 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10959 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10968 /* Begin compiling the definition of an enumeration type.
10971 UNDERLYING_TYPE is the type that will be used as the storage for
10972 the enumeration type. This should be NULL_TREE if no storage type
10975 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10977 Returns the type object, as yet incomplete.
10978 Also records info about it so that build_enumerator
10979 may be used to declare the individual values as they are read. */
10982 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10986 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10988 /* If this is the real definition for a previous forward reference,
10989 fill in the contents in the same object that used to be the
10990 forward reference. */
10992 enumtype = lookup_and_check_tag (enum_type, name,
10993 /*tag_scope=*/ts_current,
10994 /*template_header_p=*/false);
10996 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10998 error ("multiple definition of %q#T", enumtype);
10999 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
11000 /* Clear out TYPE_VALUES, and start again. */
11001 TYPE_VALUES (enumtype) = NULL_TREE;
11005 /* In case of error, make a dummy enum to allow parsing to
11007 if (enumtype == error_mark_node)
11008 name = make_anon_name ();
11010 enumtype = make_node (ENUMERAL_TYPE);
11011 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11014 if (enumtype == error_mark_node)
11019 SET_SCOPED_ENUM_P (enumtype, 1);
11020 begin_scope (sk_scoped_enum, enumtype);
11022 /* [C++0x dcl.enum]p5:
11024 If not explicitly specified, the underlying type of a scoped
11025 enumeration type is int. */
11026 if (!underlying_type)
11027 underlying_type = integer_type_node;
11030 if (underlying_type)
11032 if (CP_INTEGRAL_TYPE_P (underlying_type))
11034 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11035 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11036 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11037 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11038 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11039 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11040 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11041 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11042 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11043 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11046 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11047 underlying_type, enumtype);
11053 /* After processing and defining all the values of an enumeration type,
11054 install their decls in the enumeration type and finish it off.
11055 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11058 finish_enum (tree enumtype)
11067 bool use_short_enum;
11072 tree underlying_type = NULL_TREE;
11073 bool fixed_underlying_type_p
11074 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11076 /* We built up the VALUES in reverse order. */
11077 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11079 /* For an enum defined in a template, just set the type of the values;
11080 all further processing is postponed until the template is
11081 instantiated. We need to set the type so that tsubst of a CONST_DECL
11083 if (processing_template_decl)
11085 for (values = TYPE_VALUES (enumtype);
11087 values = TREE_CHAIN (values))
11088 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11089 if (at_function_scope_p ())
11090 add_stmt (build_min (TAG_DEFN, enumtype));
11094 /* Determine the minimum and maximum values of the enumerators. */
11095 if (TYPE_VALUES (enumtype))
11097 minnode = maxnode = NULL_TREE;
11099 for (values = TYPE_VALUES (enumtype);
11101 values = TREE_CHAIN (values))
11103 decl = TREE_VALUE (values);
11105 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11106 each enumerator has the type of its enumeration. Prior to the
11107 closing brace, the type of each enumerator is the type of its
11108 initializing value. */
11109 TREE_TYPE (decl) = enumtype;
11111 /* Update the minimum and maximum values, if appropriate. */
11112 value = DECL_INITIAL (decl);
11113 if (value == error_mark_node)
11114 value = integer_zero_node;
11115 /* Figure out what the minimum and maximum values of the
11116 enumerators are. */
11118 minnode = maxnode = value;
11119 else if (tree_int_cst_lt (maxnode, value))
11121 else if (tree_int_cst_lt (value, minnode))
11128 If the enumerator-list is empty, the underlying type is as if
11129 the enumeration had a single enumerator with value 0. */
11130 minnode = maxnode = integer_zero_node;
11132 /* Compute the number of bits require to represent all values of the
11133 enumeration. We must do this before the type of MINNODE and
11134 MAXNODE are transformed, since tree_int_cst_min_precision relies
11135 on the TREE_TYPE of the value it is passed. */
11136 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11137 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11138 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11139 precision = MAX (lowprec, highprec);
11141 if (!fixed_underlying_type_p)
11143 /* Determine the underlying type of the enumeration.
11147 The underlying type of an enumeration is an integral type that
11148 can represent all the enumerator values defined in the
11149 enumeration. It is implementation-defined which integral type is
11150 used as the underlying type for an enumeration except that the
11151 underlying type shall not be larger than int unless the value of
11152 an enumerator cannot fit in an int or unsigned int.
11154 We use "int" or an "unsigned int" as the underlying type, even if
11155 a smaller integral type would work, unless the user has
11156 explicitly requested that we use the smallest possible type. The
11157 user can request that for all enumerations with a command line
11158 flag, or for just one enumeration with an attribute. */
11160 use_short_enum = flag_short_enums
11161 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11163 for (itk = (use_short_enum ? itk_char : itk_int);
11167 underlying_type = integer_types[itk];
11168 if (TYPE_PRECISION (underlying_type) >= precision
11169 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11172 if (itk == itk_none)
11176 IF no integral type can represent all the enumerator values, the
11177 enumeration is ill-formed. */
11178 error ("no integral type can represent all of the enumerator values "
11179 "for %qT", enumtype);
11180 precision = TYPE_PRECISION (long_long_integer_type_node);
11181 underlying_type = integer_types[itk_unsigned_long_long];
11186 The value of sizeof() applied to an enumeration type, an object
11187 of an enumeration type, or an enumerator, is the value of sizeof()
11188 applied to the underlying type. */
11189 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11190 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11191 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11192 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11193 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11194 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11196 /* Set the underlying type of the enumeration type to the
11197 computed enumeration type, restricted to the enumerator
11199 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11200 set_min_and_max_values_for_integral_type
11201 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11204 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11206 /* Compute the minimum and maximum values for the type.
11210 For an enumeration where emin is the smallest enumerator and emax
11211 is the largest, the values of the enumeration are the values of the
11212 underlying type in the range bmin to bmax, where bmin and bmax are,
11213 respectively, the smallest and largest values of the smallest bit-
11214 field that can store emin and emax. */
11216 /* The middle-end currently assumes that types with TYPE_PRECISION
11217 narrower than their underlying type are suitably zero or sign
11218 extended to fill their mode. g++ doesn't make these guarantees.
11219 Until the middle-end can represent such paradoxical types, we
11220 set the TYPE_PRECISION to the width of the underlying type. */
11221 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11223 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11225 /* Convert each of the enumerators to the type of the underlying
11226 type of the enumeration. */
11227 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11229 location_t saved_location;
11231 decl = TREE_VALUE (values);
11232 saved_location = input_location;
11233 input_location = DECL_SOURCE_LOCATION (decl);
11234 if (fixed_underlying_type_p)
11235 /* If the enumeration type has a fixed underlying type, we
11236 already checked all of the enumerator values. */
11237 value = DECL_INITIAL (decl);
11239 value = perform_implicit_conversion (underlying_type,
11240 DECL_INITIAL (decl),
11241 tf_warning_or_error);
11242 input_location = saved_location;
11244 /* Do not clobber shared ints. */
11245 value = copy_node (value);
11247 TREE_TYPE (value) = enumtype;
11248 DECL_INITIAL (decl) = value;
11251 /* Fix up all variant types of this enum type. */
11252 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11254 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11255 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11256 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11257 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11258 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11259 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11260 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11261 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11262 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11263 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11264 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11267 /* Finish up the scope of a scoped enumeration. */
11268 if (SCOPED_ENUM_P (enumtype))
11271 /* Finish debugging output for this type. */
11272 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11275 /* Build and install a CONST_DECL for an enumeration constant of the
11276 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11277 Assignment of sequential values by default is handled here. */
11280 build_enumerator (tree name, tree value, tree enumtype)
11286 /* If the VALUE was erroneous, pretend it wasn't there; that will
11287 result in the enum being assigned the next value in sequence. */
11288 if (value == error_mark_node)
11291 /* Remove no-op casts from the value. */
11293 STRIP_TYPE_NOPS (value);
11295 if (! processing_template_decl)
11297 /* Validate and default VALUE. */
11298 if (value != NULL_TREE)
11300 value = integral_constant_value (value);
11302 if (TREE_CODE (value) == INTEGER_CST)
11304 value = perform_integral_promotions (value);
11305 constant_expression_warning (value);
11309 error ("enumerator value for %qD is not an integer constant", name);
11314 /* Default based on previous value. */
11315 if (value == NULL_TREE)
11317 if (TYPE_VALUES (enumtype))
11320 unsigned HOST_WIDE_INT lo;
11324 /* The next value is the previous value plus one.
11325 add_double doesn't know the type of the target expression,
11326 so we must check with int_fits_type_p as well. */
11327 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11328 if (error_operand_p (prev_value))
11329 value = error_mark_node;
11332 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11333 TREE_INT_CST_HIGH (prev_value),
11335 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11337 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11341 error ("overflow in enumeration values at %qD", name);
11342 value = error_mark_node;
11347 value = integer_zero_node;
11350 /* Remove no-op casts from the value. */
11351 STRIP_TYPE_NOPS (value);
11353 /* If the underlying type of the enum is fixed, check whether
11354 the enumerator values fits in the underlying type. If it
11355 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11356 if (ENUM_UNDERLYING_TYPE (enumtype)
11358 && TREE_CODE (value) == INTEGER_CST
11359 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11361 error ("enumerator value %E is too large for underlying type %<%T%>",
11362 value, ENUM_UNDERLYING_TYPE (enumtype));
11364 /* Silently convert the value so that we can continue. */
11365 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11370 /* C++ associates enums with global, function, or class declarations. */
11371 context = current_scope ();
11373 /* Build the actual enumeration constant. Note that the enumeration
11374 constants have the underlying type of the enum (if it is fixed)
11375 or the type of their initializer (if the underlying type of the
11376 enum is not fixed):
11380 If the underlying type is fixed, the type of each enumerator
11381 prior to the closing brace is the underlying type; if the
11382 initializing value of an enumerator cannot be represented by
11383 the underlying type, the program is ill-formed. If the
11384 underlying type is not fixed, the type of each enumerator is
11385 the type of its initializing value.
11387 If the underlying type is not fixed, it will be computed by
11388 finish_enum and we will reset the type of this enumerator. Of
11389 course, if we're processing a template, there may be no value. */
11390 type = value ? TREE_TYPE (value) : NULL_TREE;
11392 if (context && context == current_class_type)
11393 /* This enum declaration is local to the class. We need the full
11394 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11395 decl = build_lang_decl (CONST_DECL, name, type);
11397 /* It's a global enum, or it's local to a function. (Note local to
11398 a function could mean local to a class method. */
11399 decl = build_decl (input_location, CONST_DECL, name, type);
11401 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11402 TREE_CONSTANT (decl) = 1;
11403 TREE_READONLY (decl) = 1;
11404 DECL_INITIAL (decl) = value;
11406 if (context && context == current_class_type)
11407 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11408 on the TYPE_FIELDS list for `S'. (That's so that you can say
11409 things like `S::i' later.) */
11410 finish_member_declaration (decl);
11414 /* Add this enumeration constant to the list for this type. */
11415 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11418 /* Look for an enumerator with the given NAME within the enumeration
11419 type ENUMTYPE. This routine is used primarily for qualified name
11420 lookup into an enumerator in C++0x, e.g.,
11422 enum class Color { Red, Green, Blue };
11424 Color color = Color::Red;
11426 Returns the value corresponding to the enumerator, or
11427 NULL_TREE if no such enumerator was found. */
11429 lookup_enumerator (tree enumtype, tree name)
11432 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11434 e = purpose_member (name, TYPE_VALUES (enumtype));
11435 return e? TREE_VALUE (e) : NULL_TREE;
11439 /* We're defining DECL. Make sure that it's type is OK. */
11442 check_function_type (tree decl, tree current_function_parms)
11444 tree fntype = TREE_TYPE (decl);
11445 tree return_type = complete_type (TREE_TYPE (fntype));
11447 /* In a function definition, arg types must be complete. */
11448 require_complete_types_for_parms (current_function_parms);
11450 if (dependent_type_p (return_type))
11452 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11453 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11455 tree args = TYPE_ARG_TYPES (fntype);
11457 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11458 error ("return type %q#T is incomplete", return_type);
11460 error ("return type has Java class type %q#T", return_type);
11462 /* Make it return void instead. */
11463 if (TREE_CODE (fntype) == METHOD_TYPE)
11464 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11466 TREE_CHAIN (args));
11468 fntype = build_function_type (void_type_node, args);
11470 = build_exception_variant (fntype,
11471 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11474 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11477 /* Create the FUNCTION_DECL for a function definition.
11478 DECLSPECS and DECLARATOR are the parts of the declaration;
11479 they describe the function's name and the type it returns,
11480 but twisted together in a fashion that parallels the syntax of C.
11482 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11483 DECLARATOR is really the DECL for the function we are about to
11484 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11485 indicating that the function is an inline defined in-class.
11487 This function creates a binding context for the function body
11488 as well as setting up the FUNCTION_DECL in current_function_decl.
11490 For C++, we must first check whether that datum makes any sense.
11491 For example, "class A local_a(1,2);" means that variable local_a
11492 is an aggregate of type A, which should have a constructor
11493 applied to it with the argument list [1, 2].
11495 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11496 or may be a BLOCK if the function has been defined previously
11497 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11498 error_mark_node if the function has never been defined, or
11499 a BLOCK if the function has been defined somewhere. */
11502 start_preparsed_function (tree decl1, tree attrs, int flags)
11504 tree ctype = NULL_TREE;
11507 int doing_friend = 0;
11508 struct cp_binding_level *bl;
11509 tree current_function_parms;
11510 struct c_fileinfo *finfo
11511 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11512 bool honor_interface;
11514 /* Sanity check. */
11515 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11516 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11518 fntype = TREE_TYPE (decl1);
11519 if (TREE_CODE (fntype) == METHOD_TYPE)
11520 ctype = TYPE_METHOD_BASETYPE (fntype);
11522 /* ISO C++ 11.4/5. A friend function defined in a class is in
11523 the (lexical) scope of the class in which it is defined. */
11524 if (!ctype && DECL_FRIEND_P (decl1))
11526 ctype = DECL_FRIEND_CONTEXT (decl1);
11528 /* CTYPE could be null here if we're dealing with a template;
11529 for example, `inline friend float foo()' inside a template
11530 will have no CTYPE set. */
11531 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11537 if (DECL_DECLARED_INLINE_P (decl1)
11538 && lookup_attribute ("noinline", attrs))
11539 warning (0, "inline function %q+D given attribute noinline", decl1);
11541 /* Handle gnu_inline attribute. */
11542 if (GNU_INLINE_P (decl1))
11544 DECL_EXTERNAL (decl1) = 1;
11545 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11546 DECL_INTERFACE_KNOWN (decl1) = 1;
11547 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11550 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11551 /* This is a constructor, we must ensure that any default args
11552 introduced by this definition are propagated to the clones
11553 now. The clones are used directly in overload resolution. */
11554 adjust_clone_args (decl1);
11556 /* Sometimes we don't notice that a function is a static member, and
11557 build a METHOD_TYPE for it. Fix that up now. */
11558 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11559 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11561 revert_static_member_fn (decl1);
11565 /* Set up current_class_type, and enter the scope of the class, if
11568 push_nested_class (ctype);
11569 else if (DECL_STATIC_FUNCTION_P (decl1))
11570 push_nested_class (DECL_CONTEXT (decl1));
11572 /* Now that we have entered the scope of the class, we must restore
11573 the bindings for any template parameters surrounding DECL1, if it
11574 is an inline member template. (Order is important; consider the
11575 case where a template parameter has the same name as a field of
11576 the class.) It is not until after this point that
11577 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11578 if (flags & SF_INCLASS_INLINE)
11579 maybe_begin_member_template_processing (decl1);
11581 /* Effective C++ rule 15. */
11583 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11584 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11585 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11587 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11588 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11589 if (!DECL_INITIAL (decl1))
11590 DECL_INITIAL (decl1) = error_mark_node;
11592 /* This function exists in static storage.
11593 (This does not mean `static' in the C sense!) */
11594 TREE_STATIC (decl1) = 1;
11596 /* We must call push_template_decl after current_class_type is set
11597 up. (If we are processing inline definitions after exiting a
11598 class scope, current_class_type will be NULL_TREE until set above
11599 by push_nested_class.) */
11600 if (processing_template_decl)
11602 /* FIXME: Handle error_mark_node more gracefully. */
11603 tree newdecl1 = push_template_decl (decl1);
11604 if (newdecl1 != error_mark_node)
11608 /* We are now in the scope of the function being defined. */
11609 current_function_decl = decl1;
11611 /* Save the parm names or decls from this function's declarator
11612 where store_parm_decls will find them. */
11613 current_function_parms = DECL_ARGUMENTS (decl1);
11615 /* Make sure the parameter and return types are reasonable. When
11616 you declare a function, these types can be incomplete, but they
11617 must be complete when you define the function. */
11618 check_function_type (decl1, current_function_parms);
11620 /* Build the return declaration for the function. */
11621 restype = TREE_TYPE (fntype);
11622 if (DECL_RESULT (decl1) == NULL_TREE)
11626 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11627 DECL_ARTIFICIAL (resdecl) = 1;
11628 DECL_IGNORED_P (resdecl) = 1;
11629 DECL_RESULT (decl1) = resdecl;
11631 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11634 /* Let the user know we're compiling this function. */
11635 announce_function (decl1);
11637 /* Record the decl so that the function name is defined.
11638 If we already have a decl for this name, and it is a FUNCTION_DECL,
11639 use the old decl. */
11640 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11642 /* A specialization is not used to guide overload resolution. */
11643 if (!DECL_FUNCTION_MEMBER_P (decl1)
11644 && !(DECL_USE_TEMPLATE (decl1) &&
11645 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11647 tree olddecl = pushdecl (decl1);
11649 if (olddecl == error_mark_node)
11650 /* If something went wrong when registering the declaration,
11651 use DECL1; we have to have a FUNCTION_DECL to use when
11652 parsing the body of the function. */
11656 /* Otherwise, OLDDECL is either a previous declaration
11657 of the same function or DECL1 itself. */
11659 if (warn_missing_declarations
11660 && olddecl == decl1
11661 && !DECL_MAIN_P (decl1)
11662 && TREE_PUBLIC (decl1)
11663 && !DECL_DECLARED_INLINE_P (decl1))
11667 /* Check whether DECL1 is in an anonymous
11669 for (context = DECL_CONTEXT (decl1);
11671 context = DECL_CONTEXT (context))
11673 if (TREE_CODE (context) == NAMESPACE_DECL
11674 && DECL_NAME (context) == NULL_TREE)
11678 if (context == NULL)
11679 warning (OPT_Wmissing_declarations,
11680 "no previous declaration for %q+D", decl1);
11688 /* We need to set the DECL_CONTEXT. */
11689 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11690 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11692 fntype = TREE_TYPE (decl1);
11694 /* If #pragma weak applies, mark the decl appropriately now.
11695 The pragma only applies to global functions. Because
11696 determining whether or not the #pragma applies involves
11697 computing the mangled name for the declaration, we cannot
11698 apply the pragma until after we have merged this declaration
11699 with any previous declarations; if the original declaration
11700 has a linkage specification, that specification applies to
11701 the definition as well, and may affect the mangled name. */
11702 if (!DECL_CONTEXT (decl1))
11703 maybe_apply_pragma_weak (decl1);
11706 /* Reset this in case the call to pushdecl changed it. */
11707 current_function_decl = decl1;
11709 gcc_assert (DECL_INITIAL (decl1));
11711 /* This function may already have been parsed, in which case just
11712 return; our caller will skip over the body without parsing. */
11713 if (DECL_INITIAL (decl1) != error_mark_node)
11716 /* Initialize RTL machinery. We cannot do this until
11717 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11718 even when processing a template; this is how we get
11719 CFUN set up, and our per-function variables initialized.
11720 FIXME factor out the non-RTL stuff. */
11721 bl = current_binding_level;
11722 allocate_struct_function (decl1, processing_template_decl);
11724 /* Initialize the language data structures. Whenever we start
11725 a new function, we destroy temporaries in the usual way. */
11726 cfun->language = GGC_CNEW (struct language_function);
11727 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11728 current_binding_level = bl;
11730 /* Even though we're inside a function body, we still don't want to
11731 call expand_expr to calculate the size of a variable-sized array.
11732 We haven't necessarily assigned RTL to all variables yet, so it's
11733 not safe to try to expand expressions involving them. */
11734 cfun->dont_save_pending_sizes_p = 1;
11736 /* Start the statement-tree, start the tree now. */
11737 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11739 /* If we are (erroneously) defining a function that we have already
11740 defined before, wipe out what we knew before. */
11741 if (!DECL_PENDING_INLINE_P (decl1))
11742 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11744 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11746 /* We know that this was set up by `grokclassfn'. We do not
11747 wait until `store_parm_decls', since evil parse errors may
11748 never get us to that point. Here we keep the consistency
11749 between `current_class_type' and `current_class_ptr'. */
11750 tree t = DECL_ARGUMENTS (decl1);
11752 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11753 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11755 cp_function_chain->x_current_class_ref
11756 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11757 cp_function_chain->x_current_class_ptr = t;
11759 /* Constructors and destructors need to know whether they're "in
11760 charge" of initializing virtual base classes. */
11761 t = TREE_CHAIN (t);
11762 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11764 current_in_charge_parm = t;
11765 t = TREE_CHAIN (t);
11767 if (DECL_HAS_VTT_PARM_P (decl1))
11769 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11770 current_vtt_parm = t;
11774 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11775 /* Implicitly-defined methods (like the
11776 destructor for a class in which no destructor
11777 is explicitly declared) must not be defined
11778 until their definition is needed. So, we
11779 ignore interface specifications for
11780 compiler-generated functions. */
11781 && !DECL_ARTIFICIAL (decl1));
11783 if (DECL_INTERFACE_KNOWN (decl1))
11785 tree ctx = decl_function_context (decl1);
11787 if (DECL_NOT_REALLY_EXTERN (decl1))
11788 DECL_EXTERNAL (decl1) = 0;
11790 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11791 && TREE_PUBLIC (ctx))
11792 /* This is a function in a local class in an extern inline
11794 comdat_linkage (decl1);
11796 /* If this function belongs to an interface, it is public.
11797 If it belongs to someone else's interface, it is also external.
11798 This only affects inlines and template instantiations. */
11799 else if (!finfo->interface_unknown && honor_interface)
11801 if (DECL_DECLARED_INLINE_P (decl1)
11802 || DECL_TEMPLATE_INSTANTIATION (decl1)
11803 || processing_template_decl)
11805 DECL_EXTERNAL (decl1)
11806 = (finfo->interface_only
11807 || (DECL_DECLARED_INLINE_P (decl1)
11808 && ! flag_implement_inlines
11809 && !DECL_VINDEX (decl1)));
11811 /* For WIN32 we also want to put these in linkonce sections. */
11812 maybe_make_one_only (decl1);
11815 DECL_EXTERNAL (decl1) = 0;
11816 DECL_INTERFACE_KNOWN (decl1) = 1;
11817 /* If this function is in an interface implemented in this file,
11818 make sure that the back end knows to emit this function
11820 if (!DECL_EXTERNAL (decl1))
11821 mark_needed (decl1);
11823 else if (finfo->interface_unknown && finfo->interface_only
11824 && honor_interface)
11826 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11827 interface, we will have both finfo->interface_unknown and
11828 finfo->interface_only set. In that case, we don't want to
11829 use the normal heuristics because someone will supply a
11830 #pragma implementation elsewhere, and deducing it here would
11831 produce a conflict. */
11832 comdat_linkage (decl1);
11833 DECL_EXTERNAL (decl1) = 0;
11834 DECL_INTERFACE_KNOWN (decl1) = 1;
11835 DECL_DEFER_OUTPUT (decl1) = 1;
11839 /* This is a definition, not a reference.
11840 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11841 if (!GNU_INLINE_P (decl1))
11842 DECL_EXTERNAL (decl1) = 0;
11844 if ((DECL_DECLARED_INLINE_P (decl1)
11845 || DECL_TEMPLATE_INSTANTIATION (decl1))
11846 && ! DECL_INTERFACE_KNOWN (decl1)
11847 /* Don't try to defer nested functions for now. */
11848 && ! decl_function_context (decl1))
11849 DECL_DEFER_OUTPUT (decl1) = 1;
11851 DECL_INTERFACE_KNOWN (decl1) = 1;
11854 /* Determine the ELF visibility attribute for the function. We must not
11855 do this before calling "pushdecl", as we must allow "duplicate_decls"
11856 to merge any attributes appropriately. We also need to wait until
11858 if (!DECL_CLONED_FUNCTION_P (decl1))
11859 determine_visibility (decl1);
11861 begin_scope (sk_function_parms, decl1);
11865 if (DECL_DESTRUCTOR_P (decl1)
11866 || (DECL_CONSTRUCTOR_P (decl1)
11867 && targetm.cxx.cdtor_returns_this ()))
11869 cdtor_label = build_decl (input_location,
11870 LABEL_DECL, NULL_TREE, NULL_TREE);
11871 DECL_CONTEXT (cdtor_label) = current_function_decl;
11874 start_fname_decls ();
11876 store_parm_decls (current_function_parms);
11880 /* Like start_preparsed_function, except that instead of a
11881 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11883 Returns 1 on success. If the DECLARATOR is not suitable for a function
11884 (it defines a datum instead), we return 0, which tells
11885 yyparse to report a parse error. */
11888 start_function (cp_decl_specifier_seq *declspecs,
11889 const cp_declarator *declarator,
11894 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11895 if (decl1 == error_mark_node)
11897 /* If the declarator is not suitable for a function definition,
11898 cause a syntax error. */
11899 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11901 error ("invalid function declaration");
11905 if (DECL_MAIN_P (decl1))
11906 /* main must return int. grokfndecl should have corrected it
11907 (and issued a diagnostic) if the user got it wrong. */
11908 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11909 integer_type_node));
11911 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11916 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11920 use_eh_spec_block (tree fn)
11922 return (flag_exceptions && flag_enforce_eh_specs
11923 && !processing_template_decl
11924 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11925 /* We insert the EH_SPEC_BLOCK only in the original
11926 function; then, it is copied automatically to the
11928 && !DECL_CLONED_FUNCTION_P (fn)
11929 /* Implicitly-generated constructors and destructors have
11930 exception specifications. However, those specifications
11931 are the union of the possible exceptions specified by the
11932 constructors/destructors for bases and members, so no
11933 unallowed exception will ever reach this function. By
11934 not creating the EH_SPEC_BLOCK we save a little memory,
11935 and we avoid spurious warnings about unreachable
11937 && !DECL_ARTIFICIAL (fn));
11940 /* Store the parameter declarations into the current function declaration.
11941 This is called after parsing the parameter declarations, before
11942 digesting the body of the function.
11944 Also install to binding contour return value identifier, if any. */
11947 store_parm_decls (tree current_function_parms)
11949 tree fndecl = current_function_decl;
11952 /* This is a chain of any other decls that came in among the parm
11953 declarations. If a parm is declared with enum {foo, bar} x;
11954 then CONST_DECLs for foo and bar are put here. */
11955 tree nonparms = NULL_TREE;
11957 if (current_function_parms)
11959 /* This case is when the function was defined with an ANSI prototype.
11960 The parms already have decls, so we need not do anything here
11961 except record them as in effect
11962 and complain if any redundant old-style parm decls were written. */
11964 tree specparms = current_function_parms;
11967 /* Must clear this because it might contain TYPE_DECLs declared
11969 current_binding_level->names = NULL;
11971 /* If we're doing semantic analysis, then we'll call pushdecl
11972 for each of these. We must do them in reverse order so that
11973 they end in the correct forward order. */
11974 specparms = nreverse (specparms);
11976 for (parm = specparms; parm; parm = next)
11978 next = TREE_CHAIN (parm);
11979 if (TREE_CODE (parm) == PARM_DECL)
11981 if (DECL_NAME (parm) == NULL_TREE
11982 || TREE_CODE (parm) != VOID_TYPE)
11985 error ("parameter %qD declared void", parm);
11989 /* If we find an enum constant or a type tag,
11990 put it aside for the moment. */
11991 TREE_CHAIN (parm) = NULL_TREE;
11992 nonparms = chainon (nonparms, parm);
11996 /* Get the decls in their original chain order and record in the
11997 function. This is all and only the PARM_DECLs that were
11998 pushed into scope by the loop above. */
11999 DECL_ARGUMENTS (fndecl) = getdecls ();
12002 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12004 /* Now store the final chain of decls for the arguments
12005 as the decl-chain of the current lexical scope.
12006 Put the enumerators in as well, at the front so that
12007 DECL_ARGUMENTS is not modified. */
12008 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12010 if (use_eh_spec_block (current_function_decl))
12011 current_eh_spec_block = begin_eh_spec_block ();
12015 /* We have finished doing semantic analysis on DECL, but have not yet
12016 generated RTL for its body. Save away our current state, so that
12017 when we want to generate RTL later we know what to do. */
12020 save_function_data (tree decl)
12022 struct language_function *f;
12024 /* Save the language-specific per-function data so that we can
12025 get it back when we really expand this function. */
12026 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12029 f = GGC_NEW (struct language_function);
12030 memcpy (f, cp_function_chain, sizeof (struct language_function));
12031 DECL_SAVED_FUNCTION_DATA (decl) = f;
12033 /* Clear out the bits we don't need. */
12034 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12035 f->bindings = NULL;
12036 f->x_local_names = NULL;
12040 /* Set the return value of the constructor (if present). */
12043 finish_constructor_body (void)
12048 if (targetm.cxx.cdtor_returns_this ()
12049 && (! TYPE_FOR_JAVA (current_class_type)))
12051 /* Any return from a constructor will end up here. */
12052 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12054 val = DECL_ARGUMENTS (current_function_decl);
12055 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12056 DECL_RESULT (current_function_decl), val);
12057 /* Return the address of the object. */
12058 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12059 add_stmt (exprstmt);
12063 /* Do all the processing for the beginning of a destructor; set up the
12064 vtable pointers and cleanups for bases and members. */
12067 begin_destructor_body (void)
12069 tree compound_stmt;
12071 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12072 issued an error message. We still want to try to process the
12073 body of the function, but initialize_vtbl_ptrs will crash if
12074 TYPE_BINFO is NULL. */
12075 if (COMPLETE_TYPE_P (current_class_type))
12077 compound_stmt = begin_compound_stmt (0);
12078 /* Make all virtual function table pointers in non-virtual base
12079 classes point to CURRENT_CLASS_TYPE's virtual function
12081 initialize_vtbl_ptrs (current_class_ptr);
12082 finish_compound_stmt (compound_stmt);
12084 /* And insert cleanups for our bases and members so that they
12085 will be properly destroyed if we throw. */
12086 push_base_cleanups ();
12090 /* At the end of every destructor we generate code to delete the object if
12091 necessary. Do that now. */
12094 finish_destructor_body (void)
12098 /* Any return from a destructor will end up here; that way all base
12099 and member cleanups will be run when the function returns. */
12100 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12102 /* In a virtual destructor, we must call delete. */
12103 if (DECL_VIRTUAL_P (current_function_decl))
12106 tree virtual_size = cxx_sizeof (current_class_type);
12110 At the point of definition of a virtual destructor (including
12111 an implicit definition), non-placement operator delete shall
12112 be looked up in the scope of the destructor's class and if
12113 found shall be accessible and unambiguous. */
12114 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12116 /*global_p=*/false,
12117 /*placement=*/NULL_TREE,
12118 /*alloc_fn=*/NULL_TREE);
12120 if_stmt = begin_if_stmt ();
12121 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12122 current_in_charge_parm,
12125 finish_expr_stmt (exprstmt);
12126 finish_then_clause (if_stmt);
12127 finish_if_stmt (if_stmt);
12130 if (targetm.cxx.cdtor_returns_this ())
12134 val = DECL_ARGUMENTS (current_function_decl);
12135 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12136 DECL_RESULT (current_function_decl), val);
12137 /* Return the address of the object. */
12138 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12139 add_stmt (exprstmt);
12143 /* Do the necessary processing for the beginning of a function body, which
12144 in this case includes member-initializers, but not the catch clauses of
12145 a function-try-block. Currently, this means opening a binding level
12146 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12149 begin_function_body (void)
12153 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12156 if (processing_template_decl)
12157 /* Do nothing now. */;
12159 /* Always keep the BLOCK node associated with the outermost pair of
12160 curly braces of a function. These are needed for correct
12161 operation of dwarfout.c. */
12162 keep_next_level (true);
12164 stmt = begin_compound_stmt (BCS_FN_BODY);
12166 if (processing_template_decl)
12167 /* Do nothing now. */;
12168 else if (DECL_DESTRUCTOR_P (current_function_decl))
12169 begin_destructor_body ();
12174 /* Do the processing for the end of a function body. Currently, this means
12175 closing out the cleanups for fully-constructed bases and members, and in
12176 the case of the destructor, deleting the object if desired. Again, this
12177 is only meaningful for [cd]tors, since they are the only functions where
12178 there is a significant distinction between the main body and any
12179 function catch clauses. Handling, say, main() return semantics here
12180 would be wrong, as flowing off the end of a function catch clause for
12181 main() would also need to return 0. */
12184 finish_function_body (tree compstmt)
12186 if (compstmt == NULL_TREE)
12189 /* Close the block. */
12190 finish_compound_stmt (compstmt);
12192 if (processing_template_decl)
12193 /* Do nothing now. */;
12194 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12195 finish_constructor_body ();
12196 else if (DECL_DESTRUCTOR_P (current_function_decl))
12197 finish_destructor_body ();
12200 /* Given a function, returns the BLOCK corresponding to the outermost level
12201 of curly braces, skipping the artificial block created for constructor
12205 outer_curly_brace_block (tree fndecl)
12207 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12208 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12209 /* Skip the artificial function body block. */
12210 block = BLOCK_SUBBLOCKS (block);
12214 /* Finish up a function declaration and compile that function
12215 all the way to assembler language output. The free the storage
12216 for the function definition.
12218 FLAGS is a bitwise or of the following values:
12220 We just finished processing the body of an in-class inline
12221 function definition. (This processing will have taken place
12222 after the class definition is complete.) */
12225 finish_function (int flags)
12227 tree fndecl = current_function_decl;
12228 tree fntype, ctype = NULL_TREE;
12229 int inclass_inline = (flags & 2) != 0;
12232 /* When we get some parse errors, we can end up without a
12233 current_function_decl, so cope. */
12234 if (fndecl == NULL_TREE)
12235 return error_mark_node;
12237 gcc_assert (!defer_mark_used_calls);
12238 defer_mark_used_calls = true;
12240 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12241 && DECL_VIRTUAL_P (fndecl)
12242 && !processing_template_decl)
12244 tree fnclass = DECL_CONTEXT (fndecl);
12245 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12246 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12249 nested = function_depth > 1;
12250 fntype = TREE_TYPE (fndecl);
12252 /* TREE_READONLY (fndecl) = 1;
12253 This caused &foo to be of type ptr-to-const-function
12254 which then got a warning when stored in a ptr-to-function variable. */
12256 gcc_assert (building_stmt_tree ());
12257 /* The current function is being defined, so its DECL_INITIAL should
12258 be set, and unless there's a multiple definition, it should be
12259 error_mark_node. */
12260 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12262 /* For a cloned function, we've already got all the code we need;
12263 there's no need to add any extra bits. */
12264 if (!DECL_CLONED_FUNCTION_P (fndecl))
12266 if (DECL_MAIN_P (current_function_decl))
12270 /* Make it so that `main' always returns 0 by default (or
12273 stmt = finish_return_stmt (integer_one_node);
12275 stmt = finish_return_stmt (integer_zero_node);
12277 /* Hack. We don't want the middle-end to warn that this
12278 return is unreachable, so put the statement on the
12281 location_t linezero = linemap_line_start (line_table, 0, 1);
12282 SET_EXPR_LOCATION (stmt, linezero);
12286 if (use_eh_spec_block (current_function_decl))
12287 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12288 (TREE_TYPE (current_function_decl)),
12289 current_eh_spec_block);
12292 /* If we're saving up tree structure, tie off the function now. */
12293 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12295 finish_fname_decls ();
12297 /* If this function can't throw any exceptions, remember that. */
12298 if (!processing_template_decl
12299 && !cp_function_chain->can_throw
12300 && !flag_non_call_exceptions
12301 && !DECL_REPLACEABLE_P (fndecl))
12302 TREE_NOTHROW (fndecl) = 1;
12304 /* This must come after expand_function_end because cleanups might
12305 have declarations (from inline functions) that need to go into
12306 this function's blocks. */
12308 /* If the current binding level isn't the outermost binding level
12309 for this function, either there is a bug, or we have experienced
12310 syntax errors and the statement tree is malformed. */
12311 if (current_binding_level->kind != sk_function_parms)
12313 /* Make sure we have already experienced errors. */
12314 gcc_assert (errorcount);
12316 /* Throw away the broken statement tree and extra binding
12318 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12320 while (current_binding_level->kind != sk_function_parms)
12322 if (current_binding_level->kind == sk_class)
12323 pop_nested_class ();
12325 poplevel (0, 0, 0);
12328 poplevel (1, 0, 1);
12330 /* Statements should always be full-expressions at the outermost set
12331 of curly braces for a function. */
12332 gcc_assert (stmts_are_full_exprs_p ());
12334 /* Set up the named return value optimization, if we can. Candidate
12335 variables are selected in check_return_expr. */
12336 if (current_function_return_value)
12338 tree r = current_function_return_value;
12341 if (r != error_mark_node
12342 /* This is only worth doing for fns that return in memory--and
12343 simpler, since we don't have to worry about promoted modes. */
12344 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12345 /* Only allow this for variables declared in the outer scope of
12346 the function so we know that their lifetime always ends with a
12347 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12348 we were to do this optimization in tree-ssa. */
12349 && (outer = outer_curly_brace_block (fndecl))
12350 && chain_member (r, BLOCK_VARS (outer)))
12351 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12353 current_function_return_value = NULL_TREE;
12356 /* Remember that we were in class scope. */
12357 if (current_class_name)
12358 ctype = current_class_type;
12360 /* Must mark the RESULT_DECL as being in this function. */
12361 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12363 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12364 to the FUNCTION_DECL node itself. */
12365 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12367 /* Save away current state, if appropriate. */
12368 if (!processing_template_decl)
12369 save_function_data (fndecl);
12371 /* Complain if there's just no return statement. */
12372 if (warn_return_type
12373 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12374 && !dependent_type_p (TREE_TYPE (fntype))
12375 && !current_function_returns_value && !current_function_returns_null
12376 /* Don't complain if we abort or throw. */
12377 && !current_function_returns_abnormally
12378 && !DECL_NAME (DECL_RESULT (fndecl))
12379 && !TREE_NO_WARNING (fndecl)
12380 /* Structor return values (if any) are set by the compiler. */
12381 && !DECL_CONSTRUCTOR_P (fndecl)
12382 && !DECL_DESTRUCTOR_P (fndecl))
12384 warning (OPT_Wreturn_type,
12385 "no return statement in function returning non-void");
12386 TREE_NO_WARNING (fndecl) = 1;
12389 /* Store the end of the function, so that we get good line number
12390 info for the epilogue. */
12391 cfun->function_end_locus = input_location;
12393 /* Genericize before inlining. */
12394 if (!processing_template_decl)
12396 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12397 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12398 cp_genericize (fndecl);
12399 /* Clear out the bits we don't need. */
12400 f->x_current_class_ptr = NULL;
12401 f->x_current_class_ref = NULL;
12402 f->x_eh_spec_block = NULL;
12403 f->x_in_charge_parm = NULL;
12404 f->x_vtt_parm = NULL;
12405 f->x_return_value = NULL;
12406 f->bindings = NULL;
12407 f->extern_decl_map = NULL;
12409 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12410 c_warn_unused_result (gimple_body (fndecl));
12412 /* Clear out the bits we don't need. */
12413 local_names = NULL;
12415 /* We're leaving the context of this function, so zap cfun. It's still in
12416 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12418 current_function_decl = NULL;
12420 /* If this is an in-class inline definition, we may have to pop the
12421 bindings for the template parameters that we added in
12422 maybe_begin_member_template_processing when start_function was
12424 if (inclass_inline)
12425 maybe_end_member_template_processing ();
12427 /* Leave the scope of the class. */
12429 pop_nested_class ();
12435 /* Let the error reporting routines know that we're outside a
12436 function. For a nested function, this value is used in
12437 cxx_pop_function_context and then reset via pop_function_context. */
12438 current_function_decl = NULL_TREE;
12440 defer_mark_used_calls = false;
12441 if (deferred_mark_used_calls)
12446 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12448 VEC_free (tree, gc, deferred_mark_used_calls);
12454 /* Create the FUNCTION_DECL for a function definition.
12455 DECLSPECS and DECLARATOR are the parts of the declaration;
12456 they describe the return type and the name of the function,
12457 but twisted together in a fashion that parallels the syntax of C.
12459 This function creates a binding context for the function body
12460 as well as setting up the FUNCTION_DECL in current_function_decl.
12462 Returns a FUNCTION_DECL on success.
12464 If the DECLARATOR is not suitable for a function (it defines a datum
12465 instead), we return 0, which tells yyparse to report a parse error.
12467 May return void_type_node indicating that this method is actually
12468 a friend. See grokfield for more details.
12470 Came here with a `.pushlevel' .
12472 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12473 CHANGES TO CODE IN `grokfield'. */
12476 start_method (cp_decl_specifier_seq *declspecs,
12477 const cp_declarator *declarator, tree attrlist)
12479 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12482 if (fndecl == error_mark_node)
12483 return error_mark_node;
12485 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12487 error ("invalid member function declaration");
12488 return error_mark_node;
12492 cplus_decl_attributes (&fndecl, attrlist, 0);
12494 /* Pass friends other than inline friend functions back. */
12495 if (fndecl == void_type_node)
12498 if (DECL_IN_AGGR_P (fndecl))
12500 if (DECL_CONTEXT (fndecl)
12501 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12502 error ("%qD is already defined in class %qT", fndecl,
12503 DECL_CONTEXT (fndecl));
12504 return error_mark_node;
12507 check_template_shadow (fndecl);
12509 DECL_DECLARED_INLINE_P (fndecl) = 1;
12510 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12512 /* We process method specializations in finish_struct_1. */
12513 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12515 fndecl = push_template_decl (fndecl);
12516 if (fndecl == error_mark_node)
12520 if (! DECL_FRIEND_P (fndecl))
12522 if (TREE_CHAIN (fndecl))
12524 fndecl = copy_node (fndecl);
12525 TREE_CHAIN (fndecl) = NULL_TREE;
12529 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12531 /* Make a place for the parms. */
12532 begin_scope (sk_function_parms, fndecl);
12534 DECL_IN_AGGR_P (fndecl) = 1;
12538 /* Go through the motions of finishing a function definition.
12539 We don't compile this method until after the whole class has
12542 FINISH_METHOD must return something that looks as though it
12543 came from GROKFIELD (since we are defining a method, after all).
12545 This is called after parsing the body of the function definition.
12546 STMTS is the chain of statements that makes up the function body.
12548 DECL is the ..._DECL that `start_method' provided. */
12551 finish_method (tree decl)
12553 tree fndecl = decl;
12558 if (decl == void_type_node)
12561 old_initial = DECL_INITIAL (fndecl);
12563 /* Undo the level for the parms (from start_method).
12564 This is like poplevel, but it causes nothing to be
12565 saved. Saving information here confuses symbol-table
12566 output routines. Besides, this information will
12567 be correctly output when this method is actually
12570 /* Clear out the meanings of the local variables of this level;
12571 also record in each decl which block it belongs to. */
12573 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12575 if (DECL_NAME (link) != NULL_TREE)
12576 pop_binding (DECL_NAME (link), link);
12577 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12578 DECL_CONTEXT (link) = NULL_TREE;
12581 poplevel (0, 0, 0);
12583 DECL_INITIAL (fndecl) = old_initial;
12585 /* We used to check if the context of FNDECL was different from
12586 current_class_type as another way to get inside here. This didn't work
12587 for String.cc in libg++. */
12588 if (DECL_FRIEND_P (fndecl))
12590 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12592 decl = void_type_node;
12599 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12600 we can lay it out later, when and if its type becomes complete. */
12603 maybe_register_incomplete_var (tree var)
12605 gcc_assert (TREE_CODE (var) == VAR_DECL);
12607 /* Keep track of variables with incomplete types. */
12608 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12609 && DECL_EXTERNAL (var))
12611 tree inner_type = TREE_TYPE (var);
12613 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12614 inner_type = TREE_TYPE (inner_type);
12615 inner_type = TYPE_MAIN_VARIANT (inner_type);
12617 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12618 /* RTTI TD entries are created while defining the type_info. */
12619 || (TYPE_LANG_SPECIFIC (inner_type)
12620 && TYPE_BEING_DEFINED (inner_type)))
12621 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12625 /* Called when a class type (given by TYPE) is defined. If there are
12626 any existing VAR_DECLs whose type has been completed by this
12627 declaration, update them now. */
12630 complete_vars (tree type)
12632 tree *list = &incomplete_vars;
12634 gcc_assert (CLASS_TYPE_P (type));
12637 if (same_type_p (type, TREE_PURPOSE (*list)))
12639 tree var = TREE_VALUE (*list);
12640 tree type = TREE_TYPE (var);
12641 /* Complete the type of the variable. The VAR_DECL itself
12642 will be laid out in expand_expr. */
12643 complete_type (type);
12644 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12645 /* Remove this entry from the list. */
12646 *list = TREE_CHAIN (*list);
12649 list = &TREE_CHAIN (*list);
12652 /* Check for pending declarations which may have abstract type. */
12653 complete_type_check_abstract (type);
12656 /* If DECL is of a type which needs a cleanup, build and return an
12657 expression to perform that cleanup here. Return NULL_TREE if no
12658 cleanup need be done. */
12661 cxx_maybe_build_cleanup (tree decl)
12667 /* Assume no cleanup is required. */
12668 cleanup = NULL_TREE;
12670 if (error_operand_p (decl))
12673 /* Handle "__attribute__((cleanup))". We run the cleanup function
12674 before the destructor since the destructor is what actually
12675 terminates the lifetime of the object. */
12676 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12683 /* Get the name specified by the user for the cleanup function. */
12684 id = TREE_VALUE (TREE_VALUE (attr));
12685 /* Look up the name to find the cleanup function to call. It is
12686 important to use lookup_name here because that is what is
12687 used in c-common.c:handle_cleanup_attribute when performing
12688 initial checks on the attribute. Note that those checks
12689 include ensuring that the function found is not an overloaded
12690 function, or an object with an overloaded call operator,
12691 etc.; we can rely on the fact that the function found is an
12692 ordinary FUNCTION_DECL. */
12693 fn = lookup_name (id);
12694 arg = build_address (decl);
12696 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12698 tf_warning_or_error);
12700 /* Handle ordinary C++ destructors. */
12701 type = TREE_TYPE (decl);
12702 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12704 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12705 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12706 && CLASSTYPE_VBASECLASSES (type));
12710 if (TREE_CODE (type) == ARRAY_TYPE)
12713 addr = build_address (decl);
12715 /* Optimize for space over speed here. */
12716 if (!has_vbases || flag_expensive_optimizations)
12717 flags |= LOOKUP_NONVIRTUAL;
12719 call = build_delete (TREE_TYPE (addr), addr,
12720 sfk_complete_destructor, flags, 0);
12722 cleanup = build_compound_expr (input_location, cleanup, call);
12730 /* When a stmt has been parsed, this function is called. */
12737 /* DECL was originally constructed as a non-static member function,
12738 but turned out to be static. Update it accordingly. */
12741 revert_static_member_fn (tree decl)
12744 tree function = TREE_TYPE (decl);
12745 tree args = TYPE_ARG_TYPES (function);
12747 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12748 != TYPE_UNQUALIFIED)
12749 error ("static member function %q#D declared with type qualifiers", decl);
12751 args = TREE_CHAIN (args);
12752 tmp = build_function_type (TREE_TYPE (function), args);
12753 tmp = build_qualified_type (tmp, cp_type_quals (function));
12754 tmp = build_exception_variant (tmp,
12755 TYPE_RAISES_EXCEPTIONS (function));
12756 TREE_TYPE (decl) = tmp;
12757 if (DECL_ARGUMENTS (decl))
12758 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12759 DECL_STATIC_FUNCTION_P (decl) = 1;
12762 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12763 one of the language-independent trees. */
12765 enum cp_tree_node_structure_enum
12766 cp_tree_node_structure (union lang_tree_node * t)
12768 switch (TREE_CODE (&t->generic))
12770 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12771 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12772 case OVERLOAD: return TS_CP_OVERLOAD;
12773 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12774 case PTRMEM_CST: return TS_CP_PTRMEM;
12775 case BASELINK: return TS_CP_BASELINK;
12776 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12777 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12778 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12779 default: return TS_CP_GENERIC;
12783 /* Build the void_list_node (void_type_node having been created). */
12785 build_void_list_node (void)
12787 tree t = build_tree_list (NULL_TREE, void_type_node);
12792 cp_missing_noreturn_ok_p (tree decl)
12794 /* A missing noreturn is ok for the `main' function. */
12795 return DECL_MAIN_P (decl);
12798 /* Return the COMDAT group into which DECL should be placed. */
12801 cxx_comdat_group (tree decl)
12805 /* Virtual tables, construction virtual tables, and virtual table
12806 tables all go in a single COMDAT group, named after the primary
12808 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12809 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12810 /* For all other DECLs, the COMDAT group is the mangled name of the
12811 declaration itself. */
12814 while (DECL_THUNK_P (decl))
12816 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12817 into the same section as the target function. In that case
12818 we must return target's name. */
12819 tree target = THUNK_TARGET (decl);
12820 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12821 && DECL_SECTION_NAME (target) != NULL
12822 && DECL_ONE_ONLY (target))
12827 name = DECL_ASSEMBLER_NAME (decl);
12833 #include "gt-cp-decl.h"