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)->u.base.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 #ifdef NO_IMPLICIT_EXTERN_C
936 /* A new declaration doesn't match a built-in one unless it
937 is also extern "C". */
938 if (DECL_BUILT_IN (olddecl)
939 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1063 permerror (input_location, "previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1117 unsigned olddecl_uid = DECL_UID (olddecl);
1118 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1119 int new_defines_function = 0;
1120 tree new_template_info;
1122 if (newdecl == olddecl)
1125 types_match = decls_match (newdecl, olddecl);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl) == error_mark_node
1133 || TREE_TYPE (olddecl) == error_mark_node)
1134 return error_mark_node;
1136 if (DECL_P (olddecl)
1137 && TREE_CODE (newdecl) == FUNCTION_DECL
1138 && TREE_CODE (olddecl) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1141 if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (newdecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl)
1150 && DECL_UNINLINABLE (olddecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl);
1158 else if (DECL_DECLARED_INLINE_P (olddecl)
1159 && DECL_UNINLINABLE (newdecl)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1162 warning (OPT_Wattributes, "function %q+D redeclared with "
1163 "attribute noinline", newdecl);
1164 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1174 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl))
1186 warning (OPT_Wshadow, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1216 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1221 else if (TREE_VALUE (t2) == fileptr_type_node)
1223 tree t = TREE_VALUE (t1);
1225 if (TREE_CODE (t) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1231 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1235 types_match = decls_match (newdecl, olddecl);
1237 return duplicate_decls (newdecl, olddecl,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1242 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1245 else if ((DECL_EXTERN_C_P (newdecl)
1246 && DECL_EXTERN_C_P (olddecl))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl))
1254 warning (0, "new declaration %q#D", newdecl);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl, olddecl);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl))
1275 tree type = TREE_TYPE (newdecl);
1276 tree attribs = (*targetm.merge_type_attributes)
1277 (TREE_TYPE (olddecl), type);
1279 type = cp_build_type_attribute_variant (type, attribs);
1280 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl)
1287 && TREE_NOTHROW (newdecl)
1288 && !TREE_NOTHROW (olddecl)
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1292 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl) = 0;
1298 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl) = 1;
1303 TREE_PUBLIC (olddecl) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1309 COPY_DECL_RTL (newdecl, olddecl);
1312 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1321 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1324 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1325 && TREE_CODE (newdecl) != TYPE_DECL)
1326 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1327 && TREE_CODE (olddecl) != TYPE_DECL))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1339 || (TREE_CODE (olddecl) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl);
1345 if (TREE_CODE (olddecl) == TREE_LIST)
1346 olddecl = TREE_VALUE (olddecl);
1347 error ("previous declaration of %q+#D", olddecl);
1349 return error_mark_node;
1351 else if (!types_match)
1353 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1366 error ("declaration of template %q#D", newdecl);
1367 error ("conflicts with previous declaration %q+#D", olddecl);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1374 DECL_TEMPLATE_PARMS (olddecl))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1378 TREE_TYPE (TREE_TYPE (olddecl))))
1380 error ("new declaration %q#D", newdecl);
1381 error ("ambiguates old declaration %q+#D", olddecl);
1385 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1387 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1396 error ("new declaration %q#D", newdecl);
1397 error ("ambiguates old declaration %q+#D", olddecl);
1398 return error_mark_node;
1405 error ("conflicting declaration %q#D", newdecl);
1406 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1407 return error_mark_node;
1410 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1412 && (!DECL_TEMPLATE_INFO (newdecl)
1413 || (DECL_TI_TEMPLATE (newdecl)
1414 != DECL_TI_TEMPLATE (olddecl))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1416 && (!DECL_TEMPLATE_INFO (olddecl)
1417 || (DECL_TI_TEMPLATE (olddecl)
1418 != DECL_TI_TEMPLATE (newdecl))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1430 && !DECL_USE_TEMPLATE (newdecl))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1432 && !DECL_USE_TEMPLATE (olddecl))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl)
1448 && (DECL_NAMESPACE_ALIAS (newdecl)
1449 == DECL_NAMESPACE_ALIAS (olddecl)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl);
1459 error ("previous declaration of namespace %q+D here", olddecl);
1460 return error_mark_node;
1464 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1467 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1468 if (DECL_NAME (olddecl) != NULL_TREE)
1469 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl);
1472 return error_mark_node;
1474 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1481 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1482 "follows non-prototype definition here");
1484 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1485 || TREE_CODE (olddecl) == VAR_DECL)
1486 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1489 If two declarations of the same function or object
1490 specify different linkage-specifications ..., the program
1491 is ill-formed.... Except for functions with C++ linkage,
1492 a function declaration without a linkage specification
1493 shall not precede the first linkage specification for
1494 that function. A function can be declared without a
1495 linkage specification after an explicit linkage
1496 specification has been seen; the linkage explicitly
1497 specified in the earlier declaration is not affected by
1498 such a function declaration.
1500 DR 563 raises the question why the restrictions on
1501 functions should not also apply to objects. Older
1502 versions of G++ silently ignore the linkage-specification
1510 which is clearly wrong. Therefore, we now treat objects
1512 if (current_lang_depth () == 0)
1514 /* There is no explicit linkage-specification, so we use
1515 the linkage from the previous declaration. */
1516 if (!DECL_LANG_SPECIFIC (newdecl))
1517 retrofit_lang_decl (newdecl);
1518 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1522 error ("previous declaration of %q+#D with %qL linkage",
1523 olddecl, DECL_LANGUAGE (olddecl));
1524 error ("conflicts with new declaration with %qL linkage",
1525 DECL_LANGUAGE (newdecl));
1529 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1531 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1533 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1534 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1537 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1538 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1540 for (; t1 && t1 != void_list_node;
1541 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1542 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1544 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1547 permerror (input_location, "default argument given for parameter %d of %q#D",
1549 permerror (input_location, "after previous specification in %q+#D", olddecl);
1553 error ("default argument given for parameter %d of %q#D",
1555 error ("after previous specification in %q+#D",
1562 /* Do not merge an implicit typedef with an explicit one. In:
1566 typedef class A A __attribute__ ((foo));
1568 the attribute should apply only to the typedef. */
1569 if (TREE_CODE (olddecl) == TYPE_DECL
1570 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1571 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1574 /* If new decl is `static' and an `extern' was seen previously,
1576 warn_extern_redeclared_static (newdecl, olddecl);
1578 /* We have committed to returning 1 at this point. */
1579 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1581 /* Now that functions must hold information normally held
1582 by field decls, there is extra work to do so that
1583 declaration information does not get destroyed during
1585 if (DECL_VINDEX (olddecl))
1586 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1587 if (DECL_CONTEXT (olddecl))
1588 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1589 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1590 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1591 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1592 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1593 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1594 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1595 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1596 SET_OVERLOADED_OPERATOR_CODE
1597 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1598 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1600 /* Optionally warn about more than one declaration for the same
1601 name, but don't warn about a function declaration followed by a
1603 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1604 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1605 /* Don't warn about extern decl followed by definition. */
1606 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1607 /* Don't warn about friends, let add_friend take care of it. */
1608 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1610 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1611 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1614 if (DECL_DELETED_FN (newdecl))
1616 error ("deleted definition of %qD", newdecl);
1617 error ("after previous declaration %q+D", olddecl);
1621 /* Deal with C++: must preserve virtual function table size. */
1622 if (TREE_CODE (olddecl) == TYPE_DECL)
1624 tree newtype = TREE_TYPE (newdecl);
1625 tree oldtype = TREE_TYPE (olddecl);
1627 if (newtype != error_mark_node && oldtype != error_mark_node
1628 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1629 CLASSTYPE_FRIEND_CLASSES (newtype)
1630 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1632 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1635 /* Copy all the DECL_... slots specified in the new decl
1636 except for any that we copy here from the old type. */
1637 DECL_ATTRIBUTES (newdecl)
1638 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1640 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1644 old_result = DECL_TEMPLATE_RESULT (olddecl);
1645 new_result = DECL_TEMPLATE_RESULT (newdecl);
1646 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1647 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1648 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1649 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1651 DECL_ATTRIBUTES (old_result)
1652 = (*targetm.merge_decl_attributes) (old_result, new_result);
1654 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1656 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1657 && DECL_INITIAL (new_result))
1659 if (DECL_INITIAL (old_result))
1660 DECL_UNINLINABLE (old_result) = 1;
1662 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1663 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1664 DECL_NOT_REALLY_EXTERN (old_result)
1665 = DECL_NOT_REALLY_EXTERN (new_result);
1666 DECL_INTERFACE_KNOWN (old_result)
1667 = DECL_INTERFACE_KNOWN (new_result);
1668 DECL_DECLARED_INLINE_P (old_result)
1669 = DECL_DECLARED_INLINE_P (new_result);
1670 DECL_DISREGARD_INLINE_LIMITS (old_result)
1671 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1676 DECL_DECLARED_INLINE_P (old_result)
1677 |= DECL_DECLARED_INLINE_P (new_result);
1678 DECL_DISREGARD_INLINE_LIMITS (old_result)
1679 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1680 check_redeclaration_exception_specification (newdecl, olddecl);
1684 /* If the new declaration is a definition, update the file and
1685 line information on the declaration, and also make
1686 the old declaration the same definition. */
1687 if (DECL_INITIAL (new_result) != NULL_TREE)
1689 DECL_SOURCE_LOCATION (olddecl)
1690 = DECL_SOURCE_LOCATION (old_result)
1691 = DECL_SOURCE_LOCATION (newdecl);
1692 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1693 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1696 DECL_ARGUMENTS (old_result)
1697 = DECL_ARGUMENTS (new_result);
1698 for (parm = DECL_ARGUMENTS (old_result); parm;
1699 parm = TREE_CHAIN (parm))
1700 DECL_CONTEXT (parm) = old_result;
1709 /* Automatically handles default parameters. */
1710 tree oldtype = TREE_TYPE (olddecl);
1713 /* Merge the data types specified in the two decls. */
1714 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1716 /* If merge_types produces a non-typedef type, just use the old type. */
1717 if (TREE_CODE (newdecl) == TYPE_DECL
1718 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1721 if (TREE_CODE (newdecl) == VAR_DECL)
1723 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1724 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1725 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1726 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1727 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1728 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1730 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1731 if (DECL_LANG_SPECIFIC (olddecl)
1732 && CP_DECL_THREADPRIVATE_P (olddecl))
1734 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1735 if (!DECL_LANG_SPECIFIC (newdecl))
1736 retrofit_lang_decl (newdecl);
1738 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1739 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1743 /* Do this after calling `merge_types' so that default
1744 parameters don't confuse us. */
1745 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 check_redeclaration_exception_specification (newdecl, olddecl);
1747 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1749 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1750 check_default_args (newdecl);
1752 /* Lay the type out, unless already done. */
1753 if (! same_type_p (newtype, oldtype)
1754 && TREE_TYPE (newdecl) != error_mark_node
1755 && !(processing_template_decl && uses_template_parms (newdecl)))
1756 layout_type (TREE_TYPE (newdecl));
1758 if ((TREE_CODE (newdecl) == VAR_DECL
1759 || TREE_CODE (newdecl) == PARM_DECL
1760 || TREE_CODE (newdecl) == RESULT_DECL
1761 || TREE_CODE (newdecl) == FIELD_DECL
1762 || TREE_CODE (newdecl) == TYPE_DECL)
1763 && !(processing_template_decl && uses_template_parms (newdecl)))
1764 layout_decl (newdecl, 0);
1766 /* Merge the type qualifiers. */
1767 if (TREE_READONLY (newdecl))
1768 TREE_READONLY (olddecl) = 1;
1769 if (TREE_THIS_VOLATILE (newdecl))
1770 TREE_THIS_VOLATILE (olddecl) = 1;
1771 if (TREE_NOTHROW (newdecl))
1772 TREE_NOTHROW (olddecl) = 1;
1774 /* Merge deprecatedness. */
1775 if (TREE_DEPRECATED (newdecl))
1776 TREE_DEPRECATED (olddecl) = 1;
1778 /* Preserve function specific target and optimization options */
1779 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1781 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1782 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1783 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1784 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1786 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1787 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1788 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1789 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1792 /* Merge the initialization information. */
1793 if (DECL_INITIAL (newdecl) == NULL_TREE
1794 && DECL_INITIAL (olddecl) != NULL_TREE)
1796 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1797 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1798 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1800 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1801 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1805 /* Merge the section attribute.
1806 We want to issue an error if the sections conflict but that must be
1807 done later in decl_attributes since we are called before attributes
1809 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1810 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1814 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1815 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1816 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1817 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1818 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1819 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1820 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1821 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1822 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1823 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1824 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1825 /* Keep the old RTL. */
1826 COPY_DECL_RTL (olddecl, newdecl);
1828 else if (TREE_CODE (newdecl) == VAR_DECL
1829 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1831 /* Keep the old RTL. We cannot keep the old RTL if the old
1832 declaration was for an incomplete object and the new
1833 declaration is not since many attributes of the RTL will
1835 COPY_DECL_RTL (olddecl, newdecl);
1838 /* If cannot merge, then use the new type and qualifiers,
1839 and don't preserve the old rtl. */
1842 /* Clean out any memory we had of the old declaration. */
1843 tree oldstatic = value_member (olddecl, static_aggregates);
1845 TREE_VALUE (oldstatic) = error_mark_node;
1847 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1848 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1849 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1850 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1853 /* Merge the storage class information. */
1854 merge_weak (newdecl, olddecl);
1856 if (DECL_ONE_ONLY (olddecl))
1857 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1859 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1860 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1861 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1862 if (! DECL_EXTERNAL (olddecl))
1863 DECL_EXTERNAL (newdecl) = 0;
1865 new_template_info = NULL_TREE;
1866 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1868 bool new_redefines_gnu_inline = false;
1870 if (new_defines_function
1871 && ((DECL_INTERFACE_KNOWN (olddecl)
1872 && TREE_CODE (olddecl) == FUNCTION_DECL)
1873 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1874 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1875 == FUNCTION_DECL))))
1879 if (TREE_CODE (fn) == TEMPLATE_DECL)
1880 fn = DECL_TEMPLATE_RESULT (olddecl);
1882 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1885 if (!new_redefines_gnu_inline)
1887 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1888 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1889 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1891 DECL_TEMPLATE_INSTANTIATED (newdecl)
1892 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1894 /* If the OLDDECL is an instantiation and/or specialization,
1895 then the NEWDECL must be too. But, it may not yet be marked
1896 as such if the caller has created NEWDECL, but has not yet
1897 figured out that it is a redeclaration. */
1898 if (!DECL_USE_TEMPLATE (newdecl))
1899 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1901 /* Don't really know how much of the language-specific
1902 values we should copy from old to new. */
1903 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1904 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1905 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1906 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1908 if (LANG_DECL_HAS_MIN (newdecl))
1910 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1911 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1912 if (DECL_TEMPLATE_INFO (newdecl))
1913 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1914 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1916 /* Only functions have these fields. */
1917 if (TREE_CODE (newdecl) == FUNCTION_DECL
1918 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1920 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1921 olddecl_friend = DECL_FRIEND_P (olddecl);
1922 hidden_friend = (DECL_ANTICIPATED (olddecl)
1923 && DECL_HIDDEN_FRIEND_P (olddecl)
1924 && newdecl_is_friend);
1925 DECL_BEFRIENDING_CLASSES (newdecl)
1926 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1927 DECL_BEFRIENDING_CLASSES (olddecl));
1928 /* DECL_THUNKS is only valid for virtual functions,
1929 otherwise it is a DECL_FRIEND_CONTEXT. */
1930 if (DECL_VIRTUAL_P (newdecl))
1931 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1939 /* Merge parameter attributes. */
1940 tree oldarg, newarg;
1941 for (oldarg = DECL_ARGUMENTS(olddecl),
1942 newarg = DECL_ARGUMENTS(newdecl);
1944 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1945 DECL_ATTRIBUTES (newarg)
1946 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1947 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1950 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1951 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1953 /* If newdecl is not a specialization, then it is not a
1954 template-related function at all. And that means that we
1955 should have exited above, returning 0. */
1956 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1958 if (TREE_USED (olddecl))
1959 /* From [temp.expl.spec]:
1961 If a template, a member template or the member of a class
1962 template is explicitly specialized then that
1963 specialization shall be declared before the first use of
1964 that specialization that would cause an implicit
1965 instantiation to take place, in every translation unit in
1966 which such a use occurs. */
1967 error ("explicit specialization of %qD after first use",
1970 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1972 /* Don't propagate visibility from the template to the
1973 specialization here. We'll do that in determine_visibility if
1975 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1977 /* [temp.expl.spec/14] We don't inline explicit specialization
1978 just because the primary template says so. */
1980 else if (new_defines_function && DECL_INITIAL (olddecl))
1982 /* Never inline re-defined extern inline functions.
1983 FIXME: this could be better handled by keeping both
1984 function as separate declarations. */
1985 DECL_UNINLINABLE (newdecl) = 1;
1989 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1990 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1992 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1994 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1995 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1997 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1998 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1999 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2000 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2003 /* Preserve abstractness on cloned [cd]tors. */
2004 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2006 /* Update newdecl's parms to point at olddecl. */
2007 for (parm = DECL_ARGUMENTS (newdecl); parm;
2008 parm = TREE_CHAIN (parm))
2009 DECL_CONTEXT (parm) = olddecl;
2013 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2014 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2015 COPY_DECL_RTL (newdecl, olddecl);
2017 if (! types_match || new_defines_function)
2019 /* These need to be copied so that the names are available.
2020 Note that if the types do match, we'll preserve inline
2021 info and other bits, but if not, we won't. */
2022 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2023 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2025 if (new_defines_function)
2026 /* If defining a function declared with other language
2027 linkage, use the previously declared language linkage. */
2028 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2029 else if (types_match)
2031 /* If redeclaring a builtin function, and not a definition,
2032 it stays built in. */
2033 if (DECL_BUILT_IN (olddecl))
2035 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2036 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2037 /* If we're keeping the built-in definition, keep the rtl,
2038 regardless of declaration matches. */
2039 COPY_DECL_RTL (olddecl, newdecl);
2042 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2043 /* Don't clear out the arguments if we're just redeclaring a
2045 if (DECL_ARGUMENTS (olddecl))
2046 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2049 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2050 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2052 /* Now preserve various other info from the definition. */
2053 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2054 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2055 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2056 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2058 /* Warn about conflicting visibility specifications. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2060 && DECL_VISIBILITY_SPECIFIED (newdecl)
2061 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2063 warning_at (input_location, OPT_Wattributes,
2064 "%q+D: visibility attribute ignored because it", newdecl);
2065 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2066 "conflicts with previous declaration here");
2068 /* Choose the declaration which specified visibility. */
2069 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2071 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2072 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2074 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2075 so keep this behavior. */
2076 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2078 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2079 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2082 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2083 with that from NEWDECL below. */
2084 if (DECL_LANG_SPECIFIC (olddecl))
2086 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2087 != DECL_LANG_SPECIFIC (newdecl));
2088 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2091 /* Merge the USED information. */
2092 if (TREE_USED (olddecl))
2093 TREE_USED (newdecl) = 1;
2094 else if (TREE_USED (newdecl))
2095 TREE_USED (olddecl) = 1;
2097 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2101 function_size = sizeof (struct tree_decl_common);
2103 memcpy ((char *) olddecl + sizeof (struct tree_common),
2104 (char *) newdecl + sizeof (struct tree_common),
2105 function_size - sizeof (struct tree_common));
2107 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2108 (char *) newdecl + sizeof (struct tree_decl_common),
2109 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2110 if (new_template_info)
2111 /* If newdecl is a template instantiation, it is possible that
2112 the following sequence of events has occurred:
2114 o A friend function was declared in a class template. The
2115 class template was instantiated.
2117 o The instantiation of the friend declaration was
2118 recorded on the instantiation list, and is newdecl.
2120 o Later, however, instantiate_class_template called pushdecl
2121 on the newdecl to perform name injection. But, pushdecl in
2122 turn called duplicate_decls when it discovered that another
2123 declaration of a global function with the same name already
2126 o Here, in duplicate_decls, we decided to clobber newdecl.
2128 If we're going to do that, we'd better make sure that
2129 olddecl, and not newdecl, is on the list of
2130 instantiations so that if we try to do the instantiation
2131 again we won't get the clobbered declaration. */
2132 reregister_specialization (newdecl,
2138 size_t size = tree_code_size (TREE_CODE (olddecl));
2139 memcpy ((char *) olddecl + sizeof (struct tree_common),
2140 (char *) newdecl + sizeof (struct tree_common),
2141 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2142 switch (TREE_CODE (olddecl))
2152 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2153 (char *) newdecl + sizeof (struct tree_decl_common),
2154 size - sizeof (struct tree_decl_common)
2155 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2159 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2160 (char *) newdecl + sizeof (struct tree_decl_common),
2161 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2162 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2166 DECL_UID (olddecl) = olddecl_uid;
2168 DECL_FRIEND_P (olddecl) = 1;
2171 DECL_ANTICIPATED (olddecl) = 1;
2172 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2175 /* NEWDECL contains the merged attribute lists.
2176 Update OLDDECL to be the same. */
2177 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2179 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2180 so that encode_section_info has a chance to look at the new decl
2181 flags and attributes. */
2182 if (DECL_RTL_SET_P (olddecl)
2183 && (TREE_CODE (olddecl) == FUNCTION_DECL
2184 || (TREE_CODE (olddecl) == VAR_DECL
2185 && TREE_STATIC (olddecl))))
2186 make_decl_rtl (olddecl);
2188 /* The NEWDECL will no longer be needed. Because every out-of-class
2189 declaration of a member results in a call to duplicate_decls,
2190 freeing these nodes represents in a significant savings. */
2196 /* Return zero if the declaration NEWDECL is valid
2197 when the declaration OLDDECL (assumed to be for the same name)
2198 has already been seen.
2199 Otherwise return an error message format string with a %s
2200 where the identifier should go. */
2203 redeclaration_error_message (tree newdecl, tree olddecl)
2205 if (TREE_CODE (newdecl) == TYPE_DECL)
2207 /* Because C++ can put things into name space for free,
2208 constructs like "typedef struct foo { ... } foo"
2209 would look like an erroneous redeclaration. */
2210 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2213 return "redefinition of %q#D";
2215 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2217 /* If this is a pure function, its olddecl will actually be
2218 the original initialization to `0' (which we force to call
2219 abort()). Don't complain about redefinition in this case. */
2220 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2221 && DECL_INITIAL (olddecl) == NULL_TREE)
2224 /* If both functions come from different namespaces, this is not
2225 a redeclaration - this is a conflict with a used function. */
2226 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2227 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2228 && ! decls_match (olddecl, newdecl))
2229 return "%qD conflicts with used function";
2231 /* We'll complain about linkage mismatches in
2232 warn_extern_redeclared_static. */
2234 /* Defining the same name twice is no good. */
2235 if (DECL_INITIAL (olddecl) != NULL_TREE
2236 && DECL_INITIAL (newdecl) != NULL_TREE)
2238 if (DECL_NAME (olddecl) == NULL_TREE)
2239 return "%q#D not declared in class";
2240 else if (!GNU_INLINE_P (olddecl)
2241 || GNU_INLINE_P (newdecl))
2242 return "redefinition of %q#D";
2245 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2247 bool olda = GNU_INLINE_P (olddecl);
2248 bool newa = GNU_INLINE_P (newdecl);
2253 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2255 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2265 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2267 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2268 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2269 return "redefinition of %q#D";
2273 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2274 || (DECL_TEMPLATE_RESULT (newdecl)
2275 == DECL_TEMPLATE_RESULT (olddecl)))
2278 nt = DECL_TEMPLATE_RESULT (newdecl);
2279 if (DECL_TEMPLATE_INFO (nt))
2280 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2281 ot = DECL_TEMPLATE_RESULT (olddecl);
2282 if (DECL_TEMPLATE_INFO (ot))
2283 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2284 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2285 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2286 return "redefinition of %q#D";
2288 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2290 bool olda = GNU_INLINE_P (ot);
2291 bool newa = GNU_INLINE_P (nt);
2296 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2298 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2302 /* Core issue #226 (C++0x):
2304 If a friend function template declaration specifies a
2305 default template-argument, that declaration shall be a
2306 definition and shall be the only declaration of the
2307 function template in the translation unit. */
2308 if ((cxx_dialect != cxx98)
2309 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2310 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2311 /*is_primary=*/1, /*is_partial=*/0,
2312 /*is_friend_decl=*/2))
2313 return "redeclaration of friend %q#D may not have default template arguments";
2317 else if (TREE_CODE (newdecl) == VAR_DECL
2318 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2319 && (! DECL_LANG_SPECIFIC (olddecl)
2320 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2321 || DECL_THREAD_LOCAL_P (newdecl)))
2323 /* Only variables can be thread-local, and all declarations must
2324 agree on this property. */
2325 if (DECL_THREAD_LOCAL_P (newdecl))
2326 return "thread-local declaration of %q#D follows "
2327 "non-thread-local declaration";
2329 return "non-thread-local declaration of %q#D follows "
2330 "thread-local declaration";
2332 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2334 /* The objects have been declared at namespace scope. If either
2335 is a member of an anonymous union, then this is an invalid
2336 redeclaration. For example:
2342 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2343 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2344 return "redeclaration of %q#D";
2345 /* If at least one declaration is a reference, there is no
2346 conflict. For example:
2352 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2354 /* Reject two definitions. */
2355 return "redefinition of %q#D";
2359 /* Objects declared with block scope: */
2360 /* Reject two definitions, and reject a definition
2361 together with an external reference. */
2362 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2363 return "redeclaration of %q#D";
2368 /* Hash and equality functions for the named_label table. */
2371 named_label_entry_hash (const void *data)
2373 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2374 return DECL_UID (ent->label_decl);
2378 named_label_entry_eq (const void *a, const void *b)
2380 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2381 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2382 return ent_a->label_decl == ent_b->label_decl;
2385 /* Create a new label, named ID. */
2388 make_label_decl (tree id, int local_p)
2390 struct named_label_entry *ent;
2394 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2396 DECL_CONTEXT (decl) = current_function_decl;
2397 DECL_MODE (decl) = VOIDmode;
2398 C_DECLARED_LABEL_FLAG (decl) = local_p;
2400 /* Say where one reference is to the label, for the sake of the
2401 error if it is not defined. */
2402 DECL_SOURCE_LOCATION (decl) = input_location;
2404 /* Record the fact that this identifier is bound to this label. */
2405 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2407 /* Create the label htab for the function on demand. */
2409 named_labels = htab_create_ggc (13, named_label_entry_hash,
2410 named_label_entry_eq, NULL);
2412 /* Record this label on the list of labels used in this function.
2413 We do this before calling make_label_decl so that we get the
2414 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2415 ent = GGC_CNEW (struct named_label_entry);
2416 ent->label_decl = decl;
2418 slot = htab_find_slot (named_labels, ent, INSERT);
2419 gcc_assert (*slot == NULL);
2425 /* Look for a label named ID in the current function. If one cannot
2426 be found, create one. (We keep track of used, but undefined,
2427 labels, and complain about them at the end of a function.) */
2430 lookup_label (tree id)
2434 timevar_push (TV_NAME_LOOKUP);
2435 /* You can't use labels at global scope. */
2436 if (current_function_decl == NULL_TREE)
2438 error ("label %qE referenced outside of any function", id);
2439 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2442 /* See if we've already got this label. */
2443 decl = IDENTIFIER_LABEL_VALUE (id);
2444 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2445 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2447 decl = make_label_decl (id, /*local_p=*/0);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2451 /* Declare a local label named ID. */
2454 declare_local_label (tree id)
2458 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2459 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2460 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2461 current_binding_level->shadowed_labels);
2462 current_binding_level->shadowed_labels = shadow;
2464 decl = make_label_decl (id, /*local_p=*/1);
2465 TREE_VALUE (shadow) = decl;
2470 /* Returns nonzero if it is ill-formed to jump past the declaration of
2471 DECL. Returns 2 if it's also a real problem. */
2474 decl_jump_unsafe (tree decl)
2476 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2477 with automatic storage duration is not in scope to a point where it is
2478 in scope is ill-formed unless the variable has scalar type, class type
2479 with a trivial default constructor and a trivial destructor, a
2480 cv-qualified version of one of these types, or an array of one of the
2481 preceding types and is declared without an initializer (8.5). */
2482 tree type = TREE_TYPE (decl);
2484 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2485 || type == error_mark_node)
2488 type = strip_array_types (type);
2490 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2491 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2494 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2500 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2503 identify_goto (tree decl, const location_t *locus)
2506 permerror (input_location, "jump to label %qD", decl);
2508 permerror (input_location, "jump to case label");
2510 permerror (*locus, " from here");
2513 /* Check that a single previously seen jump to a newly defined label
2514 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2515 the jump context; NAMES are the names in scope in LEVEL at the jump
2516 context; LOCUS is the source position of the jump or 0. Returns
2517 true if all is well. */
2520 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2521 bool exited_omp, const location_t *locus)
2523 struct cp_binding_level *b;
2524 bool identified = false, saw_eh = false, saw_omp = false;
2528 identify_goto (decl, locus);
2529 error (" exits OpenMP structured block");
2530 identified = saw_omp = true;
2533 for (b = current_binding_level; b ; b = b->level_chain)
2535 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2537 for (new_decls = b->names; new_decls != old_decls;
2538 new_decls = TREE_CHAIN (new_decls))
2540 int problem = decl_jump_unsafe (new_decls);
2546 identify_goto (decl, locus);
2550 error (" crosses initialization of %q+#D", new_decls);
2552 permerror (input_location, " enters scope of %q+#D which has "
2553 "non-trivial destructor", new_decls);
2558 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2562 identify_goto (decl, locus);
2565 if (b->kind == sk_try)
2566 error (" enters try block");
2568 error (" enters catch block");
2571 if (b->kind == sk_omp && !saw_omp)
2575 identify_goto (decl, locus);
2578 error (" enters OpenMP structured block");
2587 check_previous_goto (tree decl, struct named_label_use_entry *use)
2589 check_previous_goto_1 (decl, use->binding_level,
2590 use->names_in_scope, use->in_omp_scope,
2591 &use->o_goto_locus);
2595 check_switch_goto (struct cp_binding_level* level)
2597 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2600 /* Check that a new jump to a label DECL is OK. Called by
2601 finish_goto_stmt. */
2604 check_goto (tree decl)
2606 struct named_label_entry *ent, dummy;
2607 bool saw_catch = false, identified = false;
2610 /* We can't know where a computed goto is jumping.
2611 So we assume that it's OK. */
2612 if (TREE_CODE (decl) != LABEL_DECL)
2615 /* We didn't record any information about this label when we created it,
2616 and there's not much point since it's trivial to analyze as a return. */
2617 if (decl == cdtor_label)
2620 dummy.label_decl = decl;
2621 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2622 gcc_assert (ent != NULL);
2624 /* If the label hasn't been defined yet, defer checking. */
2625 if (! DECL_INITIAL (decl))
2627 struct named_label_use_entry *new_use;
2629 /* Don't bother creating another use if the last goto had the
2630 same data, and will therefore create the same set of errors. */
2632 && ent->uses->names_in_scope == current_binding_level->names)
2635 new_use = GGC_NEW (struct named_label_use_entry);
2636 new_use->binding_level = current_binding_level;
2637 new_use->names_in_scope = current_binding_level->names;
2638 new_use->o_goto_locus = input_location;
2639 new_use->in_omp_scope = false;
2641 new_use->next = ent->uses;
2642 ent->uses = new_use;
2646 if (ent->in_try_scope || ent->in_catch_scope
2647 || ent->in_omp_scope || ent->bad_decls)
2649 permerror (input_location, "jump to label %q+D", decl);
2650 permerror (input_location, " from here");
2654 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2656 tree b = TREE_VALUE (bad);
2657 int u = decl_jump_unsafe (b);
2659 if (u > 1 && DECL_ARTIFICIAL (b))
2661 /* Can't skip init of __exception_info. */
2662 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2666 error (" skips initialization of %q+#D", b);
2668 permerror (input_location, " enters scope of %q+#D which has "
2669 "non-trivial destructor", b);
2672 if (ent->in_try_scope)
2673 error (" enters try block");
2674 else if (ent->in_catch_scope && !saw_catch)
2675 error (" enters catch block");
2677 if (ent->in_omp_scope)
2678 error (" enters OpenMP structured block");
2679 else if (flag_openmp)
2681 struct cp_binding_level *b;
2682 for (b = current_binding_level; b ; b = b->level_chain)
2684 if (b == ent->binding_level)
2686 if (b->kind == sk_omp)
2690 permerror (input_location, "jump to label %q+D", decl);
2691 permerror (input_location, " from here");
2694 error (" exits OpenMP structured block");
2701 /* Check that a return is ok wrt OpenMP structured blocks.
2702 Called by finish_return_stmt. Returns true if all is well. */
2705 check_omp_return (void)
2707 struct cp_binding_level *b;
2708 for (b = current_binding_level; b ; b = b->level_chain)
2709 if (b->kind == sk_omp)
2711 error ("invalid exit from OpenMP structured block");
2717 /* Define a label, specifying the location in the source file.
2718 Return the LABEL_DECL node for the label. */
2721 define_label (location_t location, tree name)
2723 struct named_label_entry *ent, dummy;
2724 struct cp_binding_level *p;
2727 timevar_push (TV_NAME_LOOKUP);
2729 decl = lookup_label (name);
2731 dummy.label_decl = decl;
2732 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2733 gcc_assert (ent != NULL);
2735 /* After labels, make any new cleanups in the function go into their
2736 own new (temporary) binding contour. */
2737 for (p = current_binding_level;
2738 p->kind != sk_function_parms;
2740 p->more_cleanups_ok = 0;
2742 if (name == get_identifier ("wchar_t"))
2743 permerror (input_location, "label named wchar_t");
2745 if (DECL_INITIAL (decl) != NULL_TREE)
2747 error ("duplicate label %qD", decl);
2748 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2752 struct named_label_use_entry *use;
2754 /* Mark label as having been defined. */
2755 DECL_INITIAL (decl) = error_mark_node;
2756 /* Say where in the source. */
2757 DECL_SOURCE_LOCATION (decl) = location;
2759 ent->binding_level = current_binding_level;
2760 ent->names_in_scope = current_binding_level->names;
2762 for (use = ent->uses; use ; use = use->next)
2763 check_previous_goto (decl, use);
2767 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2772 struct cp_binding_level *level;
2773 struct cp_switch *next;
2774 /* The SWITCH_STMT being built. */
2776 /* A splay-tree mapping the low element of a case range to the high
2777 element, or NULL_TREE if there is no high element. Used to
2778 determine whether or not a new case label duplicates an old case
2779 label. We need a tree, rather than simply a hash table, because
2780 of the GNU case range extension. */
2784 /* A stack of the currently active switch statements. The innermost
2785 switch statement is on the top of the stack. There is no need to
2786 mark the stack for garbage collection because it is only active
2787 during the processing of the body of a function, and we never
2788 collect at that point. */
2790 static struct cp_switch *switch_stack;
2792 /* Called right after a switch-statement condition is parsed.
2793 SWITCH_STMT is the switch statement being parsed. */
2796 push_switch (tree switch_stmt)
2798 struct cp_switch *p = XNEW (struct cp_switch);
2799 p->level = current_binding_level;
2800 p->next = switch_stack;
2801 p->switch_stmt = switch_stmt;
2802 p->cases = splay_tree_new (case_compare, NULL, NULL);
2809 struct cp_switch *cs = switch_stack;
2810 location_t switch_location;
2812 /* Emit warnings as needed. */
2813 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2814 switch_location = EXPR_LOCATION (cs->switch_stmt);
2816 switch_location = input_location;
2817 if (!processing_template_decl)
2818 c_do_switch_warnings (cs->cases, switch_location,
2819 SWITCH_STMT_TYPE (cs->switch_stmt),
2820 SWITCH_STMT_COND (cs->switch_stmt));
2822 splay_tree_delete (cs->cases);
2823 switch_stack = switch_stack->next;
2827 /* Note that we've seen a definition of a case label, and complain if this
2828 is a bad place for one. */
2831 finish_case_label (location_t loc, tree low_value, tree high_value)
2834 struct cp_binding_level *p;
2836 if (processing_template_decl)
2840 /* For templates, just add the case label; we'll do semantic
2841 analysis at instantiation-time. */
2842 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2843 return add_stmt (build_case_label (loc, low_value, high_value, label));
2846 /* Find the condition on which this switch statement depends. */
2847 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2848 if (cond && TREE_CODE (cond) == TREE_LIST)
2849 cond = TREE_VALUE (cond);
2851 if (!check_switch_goto (switch_stack->level))
2852 return error_mark_node;
2854 r = c_add_case_label (loc, switch_stack->cases, cond,
2855 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2856 low_value, high_value);
2858 /* After labels, make any new cleanups in the function go into their
2859 own new (temporary) binding contour. */
2860 for (p = current_binding_level;
2861 p->kind != sk_function_parms;
2863 p->more_cleanups_ok = 0;
2868 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2871 typename_hash (const void* k)
2874 const_tree const t = (const_tree) k;
2876 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2877 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2882 typedef struct typename_info {
2890 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2891 really of type `typename_info*' */
2894 typename_compare (const void * k1, const void * k2)
2896 const_tree const t1 = (const_tree) k1;
2897 const typename_info *const t2 = (const typename_info *) k2;
2899 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2900 && TYPE_CONTEXT (t1) == t2->scope
2901 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2902 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2903 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2906 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2907 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2909 Returns the new TYPENAME_TYPE. */
2911 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2914 build_typename_type (tree context, tree name, tree fullname,
2915 enum tag_types tag_type)
2923 if (typename_htab == NULL)
2924 typename_htab = htab_create_ggc (61, &typename_hash,
2925 &typename_compare, NULL);
2927 ti.scope = FROB_CONTEXT (context);
2929 ti.template_id = fullname;
2930 ti.enum_p = tag_type == enum_type;
2931 ti.class_p = (tag_type == class_type
2932 || tag_type == record_type
2933 || tag_type == union_type);
2934 hash = (htab_hash_pointer (ti.scope)
2935 ^ htab_hash_pointer (ti.name));
2937 /* See if we already have this type. */
2938 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2943 /* Build the TYPENAME_TYPE. */
2944 t = cxx_make_type (TYPENAME_TYPE);
2945 TYPE_CONTEXT (t) = ti.scope;
2946 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2947 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2948 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2950 /* Build the corresponding TYPE_DECL. */
2951 d = build_decl (input_location, TYPE_DECL, name, t);
2952 TYPE_NAME (TREE_TYPE (d)) = d;
2953 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2954 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2955 DECL_ARTIFICIAL (d) = 1;
2957 /* Store it in the hash table. */
2960 /* TYPENAME_TYPEs must always be compared structurally, because
2961 they may or may not resolve down to another type depending on
2962 the currently open classes. */
2963 SET_TYPE_STRUCTURAL_EQUALITY (t);
2969 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2970 provided to name the type. Returns an appropriate type, unless an
2971 error occurs, in which case error_mark_node is returned. If we
2972 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2973 return that, rather than the _TYPE it corresponds to, in other
2974 cases we look through the type decl. If TF_ERROR is set, complain
2975 about errors, otherwise be quiet. */
2978 make_typename_type (tree context, tree name, enum tag_types tag_type,
2979 tsubst_flags_t complain)
2985 if (name == error_mark_node
2986 || context == NULL_TREE
2987 || context == error_mark_node)
2988 return error_mark_node;
2992 if (!(TYPE_LANG_SPECIFIC (name)
2993 && (CLASSTYPE_IS_TEMPLATE (name)
2994 || CLASSTYPE_USE_TEMPLATE (name))))
2995 name = TYPE_IDENTIFIER (name);
2997 /* Create a TEMPLATE_ID_EXPR for the type. */
2998 name = build_nt (TEMPLATE_ID_EXPR,
2999 CLASSTYPE_TI_TEMPLATE (name),
3000 CLASSTYPE_TI_ARGS (name));
3002 else if (TREE_CODE (name) == TYPE_DECL)
3003 name = DECL_NAME (name);
3007 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3009 name = TREE_OPERAND (name, 0);
3010 if (TREE_CODE (name) == TEMPLATE_DECL)
3011 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3012 else if (TREE_CODE (name) == OVERLOAD)
3014 error ("%qD is not a type", name);
3015 return error_mark_node;
3018 if (TREE_CODE (name) == TEMPLATE_DECL)
3020 error ("%qD used without template parameters", name);
3021 return error_mark_node;
3023 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3024 gcc_assert (TYPE_P (context));
3026 if (!MAYBE_CLASS_TYPE_P (context))
3028 if (complain & tf_error)
3029 error ("%q#T is not a class", context);
3030 return error_mark_node;
3033 /* When the CONTEXT is a dependent type, NAME could refer to a
3034 dependent base class of CONTEXT. But look inside it anyway
3035 if CONTEXT is a currently open scope, in case it refers to a
3036 member of the current instantiation or a non-dependent base;
3037 lookup will stop when we hit a dependent base. */
3038 if (!dependent_scope_p (context))
3039 /* We should only set WANT_TYPE when we're a nested typename type.
3040 Then we can give better diagnostics if we find a non-type. */
3041 t = lookup_field (context, name, 0, /*want_type=*/true);
3045 if (!t && dependent_type_p (context))
3046 return build_typename_type (context, name, fullname, tag_type);
3048 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3052 if (complain & tf_error)
3053 error (want_template ? "no class template named %q#T in %q#T"
3054 : "no type named %q#T in %q#T", name, context);
3055 return error_mark_node;
3058 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3060 if (complain & tf_error)
3061 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3063 return error_mark_node;
3065 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3067 if (complain & tf_error)
3068 error ("%<typename %T::%D%> names %q#T, which is not a type",
3070 return error_mark_node;
3073 if (complain & tf_error)
3074 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3077 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3079 /*entering_scope=*/0,
3080 tf_warning_or_error | tf_user);
3082 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3088 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3089 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3090 in which case error_mark_node is returned.
3092 If PARM_LIST is non-NULL, also make sure that the template parameter
3093 list of TEMPLATE_DECL matches.
3095 If COMPLAIN zero, don't complain about any errors that occur. */
3098 make_unbound_class_template (tree context, tree name, tree parm_list,
3099 tsubst_flags_t complain)
3105 name = TYPE_IDENTIFIER (name);
3106 else if (DECL_P (name))
3107 name = DECL_NAME (name);
3108 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3110 if (!dependent_type_p (context)
3111 || currently_open_class (context))
3113 tree tmpl = NULL_TREE;
3115 if (MAYBE_CLASS_TYPE_P (context))
3116 tmpl = lookup_field (context, name, 0, false);
3118 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3120 if (complain & tf_error)
3121 error ("no class template named %q#T in %q#T", name, context);
3122 return error_mark_node;
3126 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3128 if (complain & tf_error)
3130 error ("template parameters do not match template");
3131 error ("%q+D declared here", tmpl);
3133 return error_mark_node;
3136 if (complain & tf_error)
3137 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3142 /* Build the UNBOUND_CLASS_TEMPLATE. */
3143 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3144 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3145 TREE_TYPE (t) = NULL_TREE;
3146 SET_TYPE_STRUCTURAL_EQUALITY (t);
3148 /* Build the corresponding TEMPLATE_DECL. */
3149 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3150 TYPE_NAME (TREE_TYPE (d)) = d;
3151 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3152 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3153 DECL_ARTIFICIAL (d) = 1;
3154 DECL_TEMPLATE_PARMS (d) = parm_list;
3161 /* Push the declarations of builtin types into the namespace.
3162 RID_INDEX is the index of the builtin type in the array
3163 RID_POINTERS. NAME is the name used when looking up the builtin
3164 type. TYPE is the _TYPE node for the builtin type. */
3167 record_builtin_type (enum rid rid_index,
3171 tree rname = NULL_TREE, tname = NULL_TREE;
3172 tree tdecl = NULL_TREE;
3174 if ((int) rid_index < (int) RID_MAX)
3175 rname = ridpointers[(int) rid_index];
3177 tname = get_identifier (name);
3179 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3180 eliminated. Built-in types should not be looked up name; their
3181 names are keywords that the parser can recognize. However, there
3182 is code in c-common.c that uses identifier_global_value to look
3183 up built-in types by name. */
3186 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3187 DECL_ARTIFICIAL (tdecl) = 1;
3188 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3194 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3195 DECL_ARTIFICIAL (tdecl) = 1;
3197 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3200 if (!TYPE_NAME (type))
3201 TYPE_NAME (type) = tdecl;
3204 debug_hooks->type_decl (tdecl, 0);
3207 /* Record one of the standard Java types.
3208 * Declare it as having the given NAME.
3209 * If SIZE > 0, it is the size of one of the integral types;
3210 * otherwise it is the negative of the size of one of the other types. */
3213 record_builtin_java_type (const char* name, int size)
3217 type = build_nonstandard_integer_type (size, 0);
3218 else if (size > -32)
3221 /* "__java_char" or ""__java_boolean". */
3222 type = build_nonstandard_integer_type (-size, 1);
3223 /* Get the signed type cached and attached to the unsigned type,
3224 so it doesn't get garbage-collected at "random" times,
3225 causing potential codegen differences out of different UIDs
3226 and different alias set numbers. */
3227 stype = build_nonstandard_integer_type (-size, 0);
3228 TREE_CHAIN (type) = stype;
3229 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3232 { /* "__java_float" or ""__java_double". */
3233 type = make_node (REAL_TYPE);
3234 TYPE_PRECISION (type) = - size;
3237 record_builtin_type (RID_MAX, name, type);
3238 decl = TYPE_NAME (type);
3240 /* Suppress generate debug symbol entries for these types,
3241 since for normal C++ they are just clutter.
3242 However, push_lang_context undoes this if extern "Java" is seen. */
3243 DECL_IGNORED_P (decl) = 1;
3245 TYPE_FOR_JAVA (type) = 1;
3249 /* Push a type into the namespace so that the back ends ignore it. */
3252 record_unknown_type (tree type, const char* name)
3254 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3255 TYPE_DECL, get_identifier (name), type));
3256 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3257 DECL_IGNORED_P (decl) = 1;
3258 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3259 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3260 TYPE_ALIGN (type) = 1;
3261 TYPE_USER_ALIGN (type) = 0;
3262 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3265 /* A string for which we should create an IDENTIFIER_NODE at
3268 typedef struct predefined_identifier
3270 /* The name of the identifier. */
3271 const char *const name;
3272 /* The place where the IDENTIFIER_NODE should be stored. */
3274 /* Nonzero if this is the name of a constructor or destructor. */
3275 const int ctor_or_dtor_p;
3276 } predefined_identifier;
3278 /* Create all the predefined identifiers. */
3281 initialize_predefined_identifiers (void)
3283 const predefined_identifier *pid;
3285 /* A table of identifiers to create at startup. */
3286 static const predefined_identifier predefined_identifiers[] = {
3287 { "C++", &lang_name_cplusplus, 0 },
3288 { "C", &lang_name_c, 0 },
3289 { "Java", &lang_name_java, 0 },
3290 /* Some of these names have a trailing space so that it is
3291 impossible for them to conflict with names written by users. */
3292 { "__ct ", &ctor_identifier, 1 },
3293 { "__base_ctor ", &base_ctor_identifier, 1 },
3294 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3295 { "__dt ", &dtor_identifier, 1 },
3296 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3297 { "__base_dtor ", &base_dtor_identifier, 1 },
3298 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3299 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3300 { "nelts", &nelts_identifier, 0 },
3301 { THIS_NAME, &this_identifier, 0 },
3302 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3303 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3304 { "_vptr", &vptr_identifier, 0 },
3305 { "__vtt_parm", &vtt_parm_identifier, 0 },
3306 { "::", &global_scope_name, 0 },
3307 { "std", &std_identifier, 0 },
3311 for (pid = predefined_identifiers; pid->name; ++pid)
3313 *pid->node = get_identifier (pid->name);
3314 if (pid->ctor_or_dtor_p)
3315 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3319 /* Create the predefined scalar types of C,
3320 and some nodes representing standard constants (0, 1, (void *)0).
3321 Initialize the global binding level.
3322 Make definitions for built-in primitive functions. */
3325 cxx_init_decl_processing (void)
3328 tree void_ftype_ptr;
3330 build_common_tree_nodes (flag_signed_char, false);
3332 /* Create all the identifiers we need. */
3333 initialize_predefined_identifiers ();
3335 /* Create the global variables. */
3336 push_to_top_level ();
3338 current_function_decl = NULL_TREE;
3339 current_binding_level = NULL;
3340 /* Enter the global namespace. */
3341 gcc_assert (global_namespace == NULL_TREE);
3342 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3344 TREE_PUBLIC (global_namespace) = 1;
3345 begin_scope (sk_namespace, global_namespace);
3347 current_lang_name = NULL_TREE;
3349 if (flag_visibility_ms_compat)
3350 default_visibility = VISIBILITY_HIDDEN;
3353 current_lang_name = lang_name_c;
3355 /* Create the `std' namespace. */
3356 push_namespace (std_identifier);
3357 std_node = current_namespace;
3360 c_common_nodes_and_builtins ();
3362 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3363 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3364 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3365 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3366 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3367 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3368 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3369 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3371 integer_two_node = build_int_cst (NULL_TREE, 2);
3372 integer_three_node = build_int_cst (NULL_TREE, 3);
3374 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3375 truthvalue_type_node = boolean_type_node;
3376 truthvalue_false_node = boolean_false_node;
3377 truthvalue_true_node = boolean_true_node;
3379 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3382 record_builtin_type (RID_MAX, NULL, string_type_node);
3385 delta_type_node = ptrdiff_type_node;
3386 vtable_index_type = ptrdiff_type_node;
3388 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3389 void_ftype = build_function_type (void_type_node, void_list_node);
3390 void_ftype_ptr = build_function_type (void_type_node,
3391 tree_cons (NULL_TREE,
3395 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3397 /* C++ extensions */
3399 unknown_type_node = make_node (UNKNOWN_TYPE);
3400 record_unknown_type (unknown_type_node, "unknown type");
3402 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3403 TREE_TYPE (unknown_type_node) = unknown_type_node;
3405 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3407 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3408 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3410 init_list_type_node = make_node (UNKNOWN_TYPE);
3411 record_unknown_type (init_list_type_node, "init list");
3414 /* Make sure we get a unique function type, so we can give
3415 its pointer type a name. (This wins for gdb.) */
3416 tree vfunc_type = make_node (FUNCTION_TYPE);
3417 TREE_TYPE (vfunc_type) = integer_type_node;
3418 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3419 layout_type (vfunc_type);
3421 vtable_entry_type = build_pointer_type (vfunc_type);
3423 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3426 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3427 layout_type (vtbl_type_node);
3428 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3429 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3430 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3431 layout_type (vtbl_ptr_type_node);
3432 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3434 push_namespace (get_identifier ("__cxxabiv1"));
3435 abi_node = current_namespace;
3438 global_type_node = make_node (LANG_TYPE);
3439 record_unknown_type (global_type_node, "global type");
3442 current_lang_name = lang_name_cplusplus;
3446 tree bad_alloc_type_node;
3447 tree bad_alloc_decl;
3448 tree newtype, deltype;
3449 tree ptr_ftype_sizetype;
3451 push_namespace (std_identifier);
3452 bad_alloc_id = get_identifier ("bad_alloc");
3453 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3454 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3456 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3457 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3458 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3462 = build_function_type (ptr_type_node,
3463 tree_cons (NULL_TREE,
3466 newtype = build_exception_variant
3467 (ptr_ftype_sizetype, add_exception_specifier
3468 (NULL_TREE, bad_alloc_type_node, -1));
3469 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3470 push_cp_library_fn (NEW_EXPR, newtype);
3471 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3472 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3473 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3477 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3479 /* Perform other language dependent initializations. */
3480 init_class_processing ();
3481 init_rtti_processing ();
3482 init_template_processing ();
3484 if (flag_exceptions)
3485 init_exception_processing ();
3487 if (! supports_one_only ())
3490 make_fname_decl = cp_make_fname_decl;
3491 start_fname_decls ();
3493 /* Show we use EH for cleanups. */
3494 if (flag_exceptions)
3495 using_eh_for_cleanups ();
3498 /* Generate an initializer for a function naming variable from
3499 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3500 filled in with the type of the init. */
3503 cp_fname_init (const char* name, tree *type_p)
3505 tree domain = NULL_TREE;
3507 tree init = NULL_TREE;
3512 length = strlen (name);
3513 domain = build_index_type (size_int (length));
3514 init = build_string (length + 1, name);
3517 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3518 type = build_cplus_array_type (type, domain);
3523 TREE_TYPE (init) = type;
3525 init = error_mark_node;
3530 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3531 the decl, LOC is the location to give the decl, NAME is the
3532 initialization string and TYPE_DEP indicates whether NAME depended
3533 on the type of the function. We make use of that to detect
3534 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3535 at the point of first use, so we mustn't push the decl now. */
3538 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3540 const char *const name = (type_dep && processing_template_decl
3541 ? NULL : fname_as_string (type_dep));
3543 tree init = cp_fname_init (name, &type);
3544 tree decl = build_decl (loc, VAR_DECL, id, type);
3547 free (CONST_CAST (char *, name));
3549 /* As we're using pushdecl_with_scope, we must set the context. */
3550 DECL_CONTEXT (decl) = current_function_decl;
3551 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3553 TREE_STATIC (decl) = 1;
3554 TREE_READONLY (decl) = 1;
3555 DECL_ARTIFICIAL (decl) = 1;
3557 TREE_USED (decl) = 1;
3559 if (current_function_decl)
3561 struct cp_binding_level *b = current_binding_level;
3562 while (b->level_chain->kind != sk_function_parms)
3564 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3565 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3566 LOOKUP_ONLYCONVERTING);
3569 pushdecl_top_level_and_finish (decl, init);
3575 builtin_function_1 (tree decl, tree context, bool is_global)
3577 tree id = DECL_NAME (decl);
3578 const char *name = IDENTIFIER_POINTER (id);
3580 retrofit_lang_decl (decl);
3582 /* All nesting of C++ functions is lexical; there is never a "static
3583 chain" in the sense of GNU C nested functions. */
3584 DECL_NO_STATIC_CHAIN (decl) = 1;
3586 DECL_ARTIFICIAL (decl) = 1;
3587 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3588 SET_DECL_LANGUAGE (decl, lang_c);
3589 /* Runtime library routines are, by definition, available in an
3590 external shared object. */
3591 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3592 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3594 DECL_CONTEXT (decl) = context;
3597 pushdecl_top_level (decl);
3601 /* A function in the user's namespace should have an explicit
3602 declaration before it is used. Mark the built-in function as
3603 anticipated but not actually declared. */
3604 if (name[0] != '_' || name[1] != '_')
3605 DECL_ANTICIPATED (decl) = 1;
3606 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3608 size_t len = strlen (name);
3610 /* Treat __*_chk fortification functions as anticipated as well,
3611 unless they are __builtin_*. */
3612 if (len > strlen ("___chk")
3613 && memcmp (name + len - strlen ("_chk"),
3614 "_chk", strlen ("_chk") + 1) == 0)
3615 DECL_ANTICIPATED (decl) = 1;
3622 cxx_builtin_function (tree decl)
3624 tree id = DECL_NAME (decl);
3625 const char *name = IDENTIFIER_POINTER (id);
3626 /* All builtins that don't begin with an '_' should additionally
3627 go in the 'std' namespace. */
3630 tree decl2 = copy_node(decl);
3631 push_namespace (std_identifier);
3632 builtin_function_1 (decl2, std_node, false);
3636 return builtin_function_1 (decl, NULL_TREE, false);
3639 /* Like cxx_builtin_function, but guarantee the function is added to the global
3640 scope. This is to allow function specific options to add new machine
3641 dependent builtins when the target ISA changes via attribute((target(...)))
3642 which saves space on program startup if the program does not use non-generic
3646 cxx_builtin_function_ext_scope (tree decl)
3649 tree id = DECL_NAME (decl);
3650 const char *name = IDENTIFIER_POINTER (id);
3651 /* All builtins that don't begin with an '_' should additionally
3652 go in the 'std' namespace. */
3655 tree decl2 = copy_node(decl);
3656 push_namespace (std_identifier);
3657 builtin_function_1 (decl2, std_node, true);
3661 return builtin_function_1 (decl, NULL_TREE, true);
3664 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3665 function. Not called directly. */
3668 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3670 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3671 DECL_EXTERNAL (fn) = 1;
3672 TREE_PUBLIC (fn) = 1;
3673 DECL_ARTIFICIAL (fn) = 1;
3674 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3675 SET_DECL_LANGUAGE (fn, lang_c);
3676 /* Runtime library routines are, by definition, available in an
3677 external shared object. */
3678 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3679 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3683 /* Returns the _DECL for a library function with C linkage.
3684 We assume that such functions never throw; if this is incorrect,
3685 callers should unset TREE_NOTHROW. */
3688 build_library_fn (tree name, tree type)
3690 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3691 TREE_NOTHROW (fn) = 1;
3695 /* Returns the _DECL for a library function with C++ linkage. */
3698 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3700 tree fn = build_library_fn_1 (name, operator_code, type);
3701 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3702 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3703 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3707 /* Like build_library_fn, but takes a C string instead of an
3711 build_library_fn_ptr (const char* name, tree type)
3713 return build_library_fn (get_identifier (name), type);
3716 /* Like build_cp_library_fn, but takes a C string instead of an
3720 build_cp_library_fn_ptr (const char* name, tree type)
3722 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3725 /* Like build_library_fn, but also pushes the function so that we will
3726 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3727 may throw exceptions listed in RAISES. */
3730 push_library_fn (tree name, tree type, tree raises)
3735 type = build_exception_variant (type, raises);
3737 fn = build_library_fn (name, type);
3738 pushdecl_top_level (fn);
3742 /* Like build_cp_library_fn, but also pushes the function so that it
3743 will be found by normal lookup. */
3746 push_cp_library_fn (enum tree_code operator_code, tree type)
3748 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3755 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3759 push_void_library_fn (tree name, tree parmtypes)
3761 tree type = build_function_type (void_type_node, parmtypes);
3762 return push_library_fn (name, type, NULL_TREE);
3765 /* Like push_library_fn, but also note that this function throws
3766 and does not return. Used for __throw_foo and the like. */
3769 push_throw_library_fn (tree name, tree type)
3771 tree fn = push_library_fn (name, type, NULL_TREE);
3772 TREE_THIS_VOLATILE (fn) = 1;
3773 TREE_NOTHROW (fn) = 0;
3777 /* When we call finish_struct for an anonymous union, we create
3778 default copy constructors and such. But, an anonymous union
3779 shouldn't have such things; this function undoes the damage to the
3780 anonymous union type T.
3782 (The reason that we create the synthesized methods is that we don't
3783 distinguish `union { int i; }' from `typedef union { int i; } U'.
3784 The first is an anonymous union; the second is just an ordinary
3788 fixup_anonymous_aggr (tree t)
3792 /* Wipe out memory of synthesized methods. */
3793 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3794 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3795 TYPE_HAS_INIT_REF (t) = 0;
3796 TYPE_HAS_CONST_INIT_REF (t) = 0;
3797 TYPE_HAS_ASSIGN_REF (t) = 0;
3798 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3800 /* Splice the implicitly generated functions out of the TYPE_METHODS
3802 q = &TYPE_METHODS (t);
3805 if (DECL_ARTIFICIAL (*q))
3806 *q = TREE_CHAIN (*q);
3808 q = &TREE_CHAIN (*q);
3811 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3812 if (TYPE_METHODS (t))
3814 tree decl = TYPE_MAIN_DECL (t);
3816 if (TREE_CODE (t) != UNION_TYPE)
3817 error_at (DECL_SOURCE_LOCATION (decl),
3818 "an anonymous struct cannot have function members");
3820 error_at (DECL_SOURCE_LOCATION (decl),
3821 "an anonymous union cannot have function members");
3824 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3825 assignment operators (because they cannot have these methods themselves).
3826 For anonymous unions this is already checked because they are not allowed
3827 in any union, otherwise we have to check it. */
3828 if (TREE_CODE (t) != UNION_TYPE)
3832 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3833 if (TREE_CODE (field) == FIELD_DECL)
3835 type = TREE_TYPE (field);
3836 if (CLASS_TYPE_P (type))
3838 if (TYPE_NEEDS_CONSTRUCTING (type))
3839 error ("member %q+#D with constructor not allowed "
3840 "in anonymous aggregate", field);
3841 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3842 error ("member %q+#D with destructor not allowed "
3843 "in anonymous aggregate", field);
3844 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3845 error ("member %q+#D with copy assignment operator "
3846 "not allowed in anonymous aggregate", field);
3852 /* Make sure that a declaration with no declarator is well-formed, i.e.
3853 just declares a tagged type or anonymous union.
3855 Returns the type declared; or NULL_TREE if none. */
3858 check_tag_decl (cp_decl_specifier_seq *declspecs)
3860 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3861 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3862 /* If a class, struct, or enum type is declared by the DECLSPECS
3863 (i.e, if a class-specifier, enum-specifier, or non-typename
3864 elaborated-type-specifier appears in the DECLSPECS),
3865 DECLARED_TYPE is set to the corresponding type. */
3866 tree declared_type = NULL_TREE;
3867 bool error_p = false;
3869 if (declspecs->multiple_types_p)
3870 error ("multiple types in one declaration");
3871 else if (declspecs->redefined_builtin_type)
3873 if (!in_system_header)
3874 permerror (input_location, "redeclaration of C++ built-in type %qT",
3875 declspecs->redefined_builtin_type);
3880 && TYPE_P (declspecs->type)
3881 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3882 && MAYBE_CLASS_TYPE_P (declspecs->type))
3883 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3884 declared_type = declspecs->type;
3885 else if (declspecs->type == error_mark_node)
3887 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3888 permerror (input_location, "declaration does not declare anything");
3889 /* Check for an anonymous union. */
3890 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3891 && TYPE_ANONYMOUS_P (declared_type))
3893 /* 7/3 In a simple-declaration, the optional init-declarator-list
3894 can be omitted only when declaring a class (clause 9) or
3895 enumeration (7.2), that is, when the decl-specifier-seq contains
3896 either a class-specifier, an elaborated-type-specifier with
3897 a class-key (9.1), or an enum-specifier. In these cases and
3898 whenever a class-specifier or enum-specifier is present in the
3899 decl-specifier-seq, the identifiers in these specifiers are among
3900 the names being declared by the declaration (as class-name,
3901 enum-names, or enumerators, depending on the syntax). In such
3902 cases, and except for the declaration of an unnamed bit-field (9.6),
3903 the decl-specifier-seq shall introduce one or more names into the
3904 program, or shall redeclare a name introduced by a previous
3905 declaration. [Example:
3906 enum { }; // ill-formed
3907 typedef class { }; // ill-formed
3911 error ("missing type-name in typedef-declaration");
3914 /* Anonymous unions are objects, so they can have specifiers. */;
3915 SET_ANON_AGGR_TYPE_P (declared_type);
3917 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3918 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3923 if (declspecs->specs[(int)ds_inline]
3924 || declspecs->specs[(int)ds_virtual])
3925 error ("%qs can only be specified for functions",
3926 declspecs->specs[(int)ds_inline]
3927 ? "inline" : "virtual");
3929 && (!current_class_type
3930 || current_scope () != current_class_type))
3931 error ("%<friend%> can only be specified inside a class");
3932 else if (declspecs->specs[(int)ds_explicit])
3933 error ("%<explicit%> can only be specified for constructors");
3934 else if (declspecs->storage_class)
3935 error ("a storage class can only be specified for objects "
3937 else if (declspecs->specs[(int)ds_const]
3938 || declspecs->specs[(int)ds_volatile]
3939 || declspecs->specs[(int)ds_restrict]
3940 || declspecs->specs[(int)ds_thread])
3941 error ("qualifiers can only be specified for objects "
3943 else if (saw_typedef)
3944 warning (0, "%<typedef%> was ignored in this declaration");
3947 return declared_type;
3950 /* Called when a declaration is seen that contains no names to declare.
3951 If its type is a reference to a structure, union or enum inherited
3952 from a containing scope, shadow that tag name for the current scope
3953 with a forward reference.
3954 If its type defines a new named structure or union
3955 or defines an enum, it is valid but we need not do anything here.
3956 Otherwise, it is an error.
3958 C++: may have to grok the declspecs to learn about static,
3959 complain for anonymous unions.
3961 Returns the TYPE declared -- or NULL_TREE if none. */
3964 shadow_tag (cp_decl_specifier_seq *declspecs)
3966 tree t = check_tag_decl (declspecs);
3971 if (declspecs->attributes)
3973 warning (0, "attribute ignored in declaration of %q+#T", t);
3974 warning (0, "attribute for %q+#T must follow the %qs keyword",
3975 t, class_key_or_enum_as_string (t));
3979 if (maybe_process_partial_specialization (t) == error_mark_node)
3982 /* This is where the variables in an anonymous union are
3983 declared. An anonymous union declaration looks like:
3985 because there is no declarator after the union, the parser
3986 sends that declaration here. */
3987 if (ANON_AGGR_TYPE_P (t))
3989 fixup_anonymous_aggr (t);
3991 if (TYPE_FIELDS (t))
3993 tree decl = grokdeclarator (/*declarator=*/NULL,
3994 declspecs, NORMAL, 0, NULL);
3995 finish_anon_union (decl);
4002 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4005 groktypename (cp_decl_specifier_seq *type_specifiers,
4006 const cp_declarator *declarator,
4007 bool is_template_arg)
4011 enum decl_context context
4012 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4013 attrs = type_specifiers->attributes;
4014 type_specifiers->attributes = NULL_TREE;
4015 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4016 if (attrs && type != error_mark_node)
4018 if (CLASS_TYPE_P (type))
4019 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4020 "outside of definition", type);
4021 else if (MAYBE_CLASS_TYPE_P (type))
4022 /* A template type parameter or other dependent type. */
4023 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4024 "type %qT without an associated declaration", type);
4026 cplus_decl_attributes (&type, attrs, 0);
4031 /* Process a DECLARATOR for a function-scope variable declaration,
4032 namespace-scope variable declaration, or function declaration.
4033 (Function definitions go through start_function; class member
4034 declarations appearing in the body of the class go through
4035 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4036 If an error occurs, the error_mark_node is returned instead.
4038 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4039 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4040 for an explicitly defaulted function, or SD_DELETED for an explicitly
4041 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4042 implicitly initialized via a default constructor. ATTRIBUTES and
4043 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4044 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4045 set, the caller is responsible for calling pop_scope. */
4048 start_decl (const cp_declarator *declarator,
4049 cp_decl_specifier_seq *declspecs,
4052 tree prefix_attributes,
4053 tree *pushed_scope_p)
4061 *pushed_scope_p = NULL_TREE;
4063 /* An object declared as __attribute__((deprecated)) suppresses
4064 warnings of uses of other deprecated items. */
4065 if (lookup_attribute ("deprecated", attributes))
4066 deprecated_state = DEPRECATED_SUPPRESS;
4068 attributes = chainon (attributes, prefix_attributes);
4070 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4073 deprecated_state = DEPRECATED_NORMAL;
4075 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4076 || decl == error_mark_node)
4077 return error_mark_node;
4079 type = TREE_TYPE (decl);
4081 context = DECL_CONTEXT (decl);
4085 *pushed_scope_p = push_scope (context);
4087 /* We are only interested in class contexts, later. */
4088 if (TREE_CODE (context) == NAMESPACE_DECL)
4089 context = NULL_TREE;
4093 /* Is it valid for this decl to have an initializer at all?
4094 If not, set INITIALIZED to zero, which will indirectly
4095 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4096 switch (TREE_CODE (decl))
4099 error ("typedef %qD is initialized (use decltype instead)", decl);
4100 return error_mark_node;
4103 if (initialized == SD_DELETED)
4104 /* We'll handle the rest of the semantics later, but we need to
4105 set this now so it's visible to duplicate_decls. */
4106 DECL_DELETED_FN (decl) = 1;
4115 if (! toplevel_bindings_p ()
4116 && DECL_EXTERNAL (decl))
4117 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4119 DECL_EXTERNAL (decl) = 0;
4120 if (toplevel_bindings_p ())
4121 TREE_STATIC (decl) = 1;
4124 /* If this is a typedef that names the class for linkage purposes
4125 (7.1.3p8), apply any attributes directly to the type. */
4126 if (TREE_CODE (decl) == TYPE_DECL
4127 && TAGGED_TYPE_P (TREE_TYPE (decl))
4128 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4129 flags = ATTR_FLAG_TYPE_IN_PLACE;
4133 /* Set attributes here so if duplicate decl, will have proper attributes. */
4134 cplus_decl_attributes (&decl, attributes, flags);
4136 /* Dllimported symbols cannot be defined. Static data members (which
4137 can be initialized in-class and dllimported) go through grokfield,
4138 not here, so we don't need to exclude those decls when checking for
4140 if (initialized && DECL_DLLIMPORT_P (decl))
4142 error ("definition of %q#D is marked %<dllimport%>", decl);
4143 DECL_DLLIMPORT_P (decl) = 0;
4146 /* If #pragma weak was used, mark the decl weak now. */
4147 maybe_apply_pragma_weak (decl);
4149 if (TREE_CODE (decl) == FUNCTION_DECL
4150 && DECL_DECLARED_INLINE_P (decl)
4151 && DECL_UNINLINABLE (decl)
4152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4153 warning (0, "inline function %q+D given attribute noinline", decl);
4155 if (context && COMPLETE_TYPE_P (complete_type (context)))
4157 if (TREE_CODE (decl) == VAR_DECL)
4159 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4160 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4161 error ("%q#D is not a static member of %q#T", decl, context);
4164 if (DECL_CONTEXT (field) != context)
4166 if (!same_type_p (DECL_CONTEXT (field), context))
4167 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4168 "to be defined as %<%T::%D%>",
4169 DECL_CONTEXT (field), DECL_NAME (decl),
4170 context, DECL_NAME (decl));
4171 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4173 if (processing_specialization
4174 && template_class_depth (context) == 0
4175 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4176 error ("template header not allowed in member definition "
4177 "of explicitly specialized class");
4178 /* Static data member are tricky; an in-class initialization
4179 still doesn't provide a definition, so the in-class
4180 declaration will have DECL_EXTERNAL set, but will have an
4181 initialization. Thus, duplicate_decls won't warn
4182 about this situation, and so we check here. */
4183 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4184 error ("duplicate initialization of %qD", decl);
4185 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4191 tree field = check_classfn (context, decl,
4192 (processing_template_decl
4193 > template_class_depth (context))
4194 ? current_template_parms
4196 if (field && field != error_mark_node
4197 && duplicate_decls (decl, field,
4198 /*newdecl_is_friend=*/false))
4202 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4203 DECL_IN_AGGR_P (decl) = 0;
4204 /* Do not mark DECL as an explicit specialization if it was not
4205 already marked as an instantiation; a declaration should
4206 never be marked as a specialization unless we know what
4207 template is being specialized. */
4208 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4210 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4212 /* [temp.expl.spec] An explicit specialization of a static data
4213 member of a template is a definition if the declaration
4214 includes an initializer; otherwise, it is a declaration.
4216 We check for processing_specialization so this only applies
4217 to the new specialization syntax. */
4218 if (!initialized && processing_specialization)
4219 DECL_EXTERNAL (decl) = 1;
4222 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4223 permerror (input_location, "declaration of %q#D outside of class is not definition",
4227 was_public = TREE_PUBLIC (decl);
4229 /* Enter this declaration into the symbol table. */
4230 decl = maybe_push_decl (decl);
4232 if (processing_template_decl)
4233 decl = push_template_decl (decl);
4234 if (decl == error_mark_node)
4235 return error_mark_node;
4237 /* Tell the back end to use or not use .common as appropriate. If we say
4238 -fconserve-space, we want this to save .data space, at the expense of
4239 wrong semantics. If we say -fno-conserve-space, we want this to
4240 produce errors about redefs; to do this we force variables into the
4242 if (flag_conserve_space
4243 && TREE_CODE (decl) == VAR_DECL
4244 && TREE_PUBLIC (decl)
4245 && !DECL_THREAD_LOCAL_P (decl)
4246 && !have_global_bss_p ())
4247 DECL_COMMON (decl) = 1;
4249 if (TREE_CODE (decl) == VAR_DECL
4250 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4251 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4253 /* This is a const variable with implicit 'static'. Set
4254 DECL_THIS_STATIC so we can tell it from variables that are
4255 !TREE_PUBLIC because of the anonymous namespace. */
4256 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4257 DECL_THIS_STATIC (decl) = 1;
4260 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4261 start_decl_1 (decl, initialized);
4266 /* Process the declaration of a variable DECL. INITIALIZED is true
4267 iff DECL is explicitly initialized. (INITIALIZED is false if the
4268 variable is initialized via an implicitly-called constructor.)
4269 This function must be called for ordinary variables (including, for
4270 example, implicit instantiations of templates), but must not be
4271 called for template declarations. */
4274 start_decl_1 (tree decl, bool initialized)
4278 bool aggregate_definition_p;
4280 gcc_assert (!processing_template_decl);
4282 if (error_operand_p (decl))
4285 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4287 type = TREE_TYPE (decl);
4288 complete_p = COMPLETE_TYPE_P (type);
4289 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4291 /* If an explicit initializer is present, or if this is a definition
4292 of an aggregate, then we need a complete type at this point.
4293 (Scalars are always complete types, so there is nothing to
4294 check.) This code just sets COMPLETE_P; errors (if necessary)
4295 are issued below. */
4296 if ((initialized || aggregate_definition_p)
4298 && COMPLETE_TYPE_P (complete_type (type)))
4301 /* We will not yet have set TREE_READONLY on DECL if the type
4302 was "const", but incomplete, before this point. But, now, we
4303 have a complete type, so we can try again. */
4304 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4308 /* Is it valid for this decl to have an initializer at all? */
4310 /* Don't allow initializations for incomplete types except for
4311 arrays which might be completed by the initialization. */
4313 ; /* A complete type is ok. */
4314 else if (type_uses_auto (type))
4315 ; /* An auto type is ok. */
4316 else if (TREE_CODE (type) != ARRAY_TYPE)
4318 error ("variable %q#D has initializer but incomplete type", decl);
4319 type = TREE_TYPE (decl) = error_mark_node;
4321 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4323 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4324 error ("elements of array %q#D have incomplete type", decl);
4325 /* else we already gave an error in start_decl. */
4328 else if (aggregate_definition_p && !complete_p)
4330 if (type_uses_auto (type))
4331 error ("declaration of %q#D has no initializer", decl);
4333 error ("aggregate %q#D has incomplete type and cannot be defined",
4335 /* Change the type so that assemble_variable will give
4336 DECL an rtl we can live with: (mem (const_int 0)). */
4337 type = TREE_TYPE (decl) = error_mark_node;
4340 /* Create a new scope to hold this declaration if necessary.
4341 Whether or not a new scope is necessary cannot be determined
4342 until after the type has been completed; if the type is a
4343 specialization of a class template it is not until after
4344 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4345 will be set correctly. */
4346 maybe_push_cleanup_level (type);
4349 /* Handle initialization of references. DECL, TYPE, and INIT have the
4350 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4351 but will be set to a new CLEANUP_STMT if a temporary is created
4352 that must be destroyed subsequently.
4354 Returns an initializer expression to use to initialize DECL, or
4355 NULL if the initialization can be performed statically.
4357 Quotes on semantics can be found in ARM 8.4.3. */
4360 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4364 if (init == NULL_TREE)
4366 if ((DECL_LANG_SPECIFIC (decl) == 0
4367 || DECL_IN_AGGR_P (decl) == 0)
4368 && ! DECL_THIS_EXTERN (decl))
4369 error ("%qD declared as reference but not initialized", decl);
4373 if (TREE_CODE (init) == TREE_LIST)
4374 init = build_x_compound_expr_from_list (init, "initializer");
4376 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4377 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4378 /* Note: default conversion is only called in very special cases. */
4379 init = decay_conversion (init);
4381 /* Convert INIT to the reference type TYPE. This may involve the
4382 creation of a temporary, whose lifetime must be the same as that
4383 of the reference. If so, a DECL_EXPR for the temporary will be
4384 added just after the DECL_EXPR for DECL. That's why we don't set
4385 DECL_INITIAL for local references (instead assigning to them
4386 explicitly); we need to allow the temporary to be initialized
4388 tmp = initialize_reference (type, init, decl, cleanup);
4390 if (tmp == error_mark_node)
4392 else if (tmp == NULL_TREE)
4394 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4398 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4401 DECL_INITIAL (decl) = tmp;
4406 /* Subroutine of check_initializer. We're initializing a DECL of
4407 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4408 extend the lifetime of the underlying array to match that of the decl,
4409 just like for reference initialization. CLEANUP is as for
4410 grok_reference_init. */
4413 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4415 tree aggr_init, array, arrtype;
4416 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4417 aggr_init = TARGET_EXPR_INITIAL (init);
4418 init = build2 (INIT_EXPR, type, decl, init);
4420 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4421 arrtype = TREE_TYPE (array);
4423 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4424 array = TREE_OPERAND (array, 0);
4425 /* If the array is constant, finish_compound_literal already made it a
4426 static variable and we don't need to do anything here. */
4427 if (decl && TREE_CODE (array) == TARGET_EXPR)
4430 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4431 var = build_address (var);
4432 var = convert (arrtype, var);
4433 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4434 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4439 /* Designated initializers in arrays are not supported in GNU C++.
4440 The parser cannot detect this error since it does not know whether
4441 a given brace-enclosed initializer is for a class type or for an
4442 array. This function checks that CE does not use a designated
4443 initializer. If it does, an error is issued. Returns true if CE
4444 is valid, i.e., does not have a designated initializer. */
4447 check_array_designated_initializer (const constructor_elt *ce)
4449 /* Designated initializers for array elements are not supported. */
4452 /* The parser only allows identifiers as designated
4454 if (ce->index == error_mark_node)
4455 error ("name used in a GNU-style designated "
4456 "initializer for an array");
4459 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4460 error ("name %qD used in a GNU-style designated "
4461 "initializer for an array", ce->index);
4469 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4470 array until we finish parsing the initializer. If that's the
4471 situation we're in, update DECL accordingly. */
4474 maybe_deduce_size_from_array_init (tree decl, tree init)
4476 tree type = TREE_TYPE (decl);
4478 if (TREE_CODE (type) == ARRAY_TYPE
4479 && TYPE_DOMAIN (type) == NULL_TREE
4480 && TREE_CODE (decl) != TYPE_DECL)
4482 /* do_default is really a C-ism to deal with tentative definitions.
4483 But let's leave it here to ease the eventual merge. */
4484 int do_default = !DECL_EXTERNAL (decl);
4485 tree initializer = init ? init : DECL_INITIAL (decl);
4488 /* Check that there are no designated initializers in INIT, as
4489 those are not supported in GNU C++, and as the middle-end
4490 will crash if presented with a non-numeric designated
4492 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4494 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4495 constructor_elt *ce;
4498 VEC_iterate (constructor_elt, v, i, ce);
4500 if (!check_array_designated_initializer (ce))
4506 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4510 error ("initializer fails to determine size of %qD", decl);
4511 TREE_TYPE (decl) = error_mark_node;
4513 else if (failure == 2)
4517 error ("array size missing in %qD", decl);
4518 TREE_TYPE (decl) = error_mark_node;
4520 /* If a `static' var's size isn't known, make it extern as
4521 well as static, so it does not get allocated. If it's not
4522 `static', then don't mark it extern; finish_incomplete_decl
4523 will give it a default size and it will get allocated. */
4524 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4525 DECL_EXTERNAL (decl) = 1;
4527 else if (failure == 3)
4529 error ("zero-size array %qD", decl);
4530 TREE_TYPE (decl) = error_mark_node;
4534 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4536 relayout_decl (decl);
4540 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4541 any appropriate error messages regarding the layout. */
4544 layout_var_decl (tree decl)
4548 type = TREE_TYPE (decl);
4549 if (type == error_mark_node)
4552 /* If we haven't already layed out this declaration, do so now.
4553 Note that we must not call complete type for an external object
4554 because it's type might involve templates that we are not
4555 supposed to instantiate yet. (And it's perfectly valid to say
4556 `extern X x' for some incomplete type `X'.) */
4557 if (!DECL_EXTERNAL (decl))
4558 complete_type (type);
4559 if (!DECL_SIZE (decl)
4560 && TREE_TYPE (decl) != error_mark_node
4561 && (COMPLETE_TYPE_P (type)
4562 || (TREE_CODE (type) == ARRAY_TYPE
4563 && !TYPE_DOMAIN (type)
4564 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4565 layout_decl (decl, 0);
4567 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4569 /* An automatic variable with an incomplete type: that is an error.
4570 Don't talk about array types here, since we took care of that
4571 message in grokdeclarator. */
4572 error ("storage size of %qD isn't known", decl);
4573 TREE_TYPE (decl) = error_mark_node;
4576 /* Keep this code around in case we later want to control debug info
4577 based on whether a type is "used". (jason 1999-11-11) */
4579 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4580 /* Let debugger know it should output info for this type. */
4581 note_debug_info_needed (ttype);
4583 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4584 note_debug_info_needed (DECL_CONTEXT (decl));
4587 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4588 && DECL_SIZE (decl) != NULL_TREE
4589 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4591 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4592 constant_expression_warning (DECL_SIZE (decl));
4595 error ("storage size of %qD isn't constant", decl);
4596 TREE_TYPE (decl) = error_mark_node;
4601 /* If a local static variable is declared in an inline function, or if
4602 we have a weak definition, we must endeavor to create only one
4603 instance of the variable at link-time. */
4606 maybe_commonize_var (tree decl)
4608 /* Static data in a function with comdat linkage also has comdat
4610 if (TREE_STATIC (decl)
4611 /* Don't mess with __FUNCTION__. */
4612 && ! DECL_ARTIFICIAL (decl)
4613 && DECL_FUNCTION_SCOPE_P (decl)
4614 /* Unfortunately, import_export_decl has not always been called
4615 before the function is processed, so we cannot simply check
4617 && (DECL_COMDAT (DECL_CONTEXT (decl))
4618 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4619 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4620 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4624 /* With weak symbols, we simply make the variable COMDAT;
4625 that will cause copies in multiple translations units to
4627 comdat_linkage (decl);
4631 if (DECL_INITIAL (decl) == NULL_TREE
4632 || DECL_INITIAL (decl) == error_mark_node)
4634 /* Without weak symbols, we can use COMMON to merge
4635 uninitialized variables. */
4636 TREE_PUBLIC (decl) = 1;
4637 DECL_COMMON (decl) = 1;
4641 /* While for initialized variables, we must use internal
4642 linkage -- which means that multiple copies will not
4644 TREE_PUBLIC (decl) = 0;
4645 DECL_COMMON (decl) = 0;
4646 warning_at (input_location, 0,
4647 "sorry: semantics of inline function static "
4648 "data %q+#D are wrong (you'll wind up "
4649 "with multiple copies)", decl);
4650 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4651 " you can work around this by removing "
4656 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4657 /* Set it up again; we might have set DECL_INITIAL since the last
4659 comdat_linkage (decl);
4662 /* Issue an error message if DECL is an uninitialized const variable. */
4665 check_for_uninitialized_const_var (tree decl)
4667 tree type = TREE_TYPE (decl);
4669 /* ``Unless explicitly declared extern, a const object does not have
4670 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4672 if (TREE_CODE (decl) == VAR_DECL
4673 && TREE_CODE (type) != REFERENCE_TYPE
4674 && CP_TYPE_CONST_P (type)
4675 && !TYPE_NEEDS_CONSTRUCTING (type)
4676 && !DECL_INITIAL (decl))
4677 error ("uninitialized const %qD", decl);
4681 /* Structure holding the current initializer being processed by reshape_init.
4682 CUR is a pointer to the current element being processed, END is a pointer
4683 after the last element present in the initializer. */
4684 typedef struct reshape_iterator_t
4686 constructor_elt *cur;
4687 constructor_elt *end;
4690 static tree reshape_init_r (tree, reshape_iter *, bool);
4692 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4693 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4694 initialized. If there are no more such fields, the return value
4698 next_initializable_field (tree field)
4701 && (TREE_CODE (field) != FIELD_DECL
4702 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4703 || DECL_ARTIFICIAL (field)))
4704 field = TREE_CHAIN (field);
4709 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4710 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4711 INTEGER_CST representing the size of the array minus one (the maximum index),
4712 or NULL_TREE if the array was declared without specifying the size. D is
4713 the iterator within the constructor. */
4716 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4719 bool sized_array_p = (max_index != NULL_TREE);
4720 unsigned HOST_WIDE_INT max_index_cst = 0;
4721 unsigned HOST_WIDE_INT index;
4723 /* The initializer for an array is always a CONSTRUCTOR. */
4724 new_init = build_constructor (init_list_type_node, NULL);
4728 /* Minus 1 is used for zero sized arrays. */
4729 if (integer_all_onesp (max_index))
4732 if (host_integerp (max_index, 1))
4733 max_index_cst = tree_low_cst (max_index, 1);
4734 /* sizetype is sign extended, not zero extended. */
4736 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4740 /* Loop until there are no more initializers. */
4742 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4747 check_array_designated_initializer (d->cur);
4748 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4749 if (elt_init == error_mark_node)
4750 return error_mark_node;
4751 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4757 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4758 Parameters are the same of reshape_init_r. */
4761 reshape_init_array (tree type, reshape_iter *d)
4763 tree max_index = NULL_TREE;
4765 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4767 if (TYPE_DOMAIN (type))
4768 max_index = array_type_nelts (type);
4770 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4773 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4774 Parameters are the same of reshape_init_r. */
4777 reshape_init_vector (tree type, reshape_iter *d)
4779 tree max_index = NULL_TREE;
4782 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4784 if (COMPOUND_LITERAL_P (d->cur->value))
4786 tree value = d->cur->value;
4787 if (!same_type_p (TREE_TYPE (value), type))
4789 error ("invalid type %qT as initializer for a vector of type %qT",
4790 TREE_TYPE (d->cur->value), type);
4791 value = error_mark_node;
4797 /* For a vector, the representation type is a struct
4798 containing a single member which is an array of the
4799 appropriate size. */
4800 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4801 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4802 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4804 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4807 /* Subroutine of reshape_init_r, processes the initializers for classes
4808 or union. Parameters are the same of reshape_init_r. */
4811 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4816 gcc_assert (CLASS_TYPE_P (type));
4818 /* The initializer for a class is always a CONSTRUCTOR. */
4819 new_init = build_constructor (init_list_type_node, NULL);
4820 field = next_initializable_field (TYPE_FIELDS (type));
4826 An initializer for an aggregate member that is an
4827 empty class shall have the form of an empty
4828 initializer-list {}. */
4829 if (!first_initializer_p)
4831 error ("initializer for %qT must be brace-enclosed", type);
4832 return error_mark_node;
4837 /* Loop through the initializable fields, gathering initializers. */
4838 while (d->cur != d->end)
4842 /* Handle designated initializers, as an extension. */
4845 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4847 if (!field || TREE_CODE (field) != FIELD_DECL)
4849 error ("%qT has no non-static data member named %qD", type,
4851 return error_mark_node;
4855 /* If we processed all the member of the class, we are done. */
4859 field_init = reshape_init_r (TREE_TYPE (field), d,
4860 /*first_initializer_p=*/false);
4861 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4865 When a union is initialized with a brace-enclosed
4866 initializer, the braces shall only contain an
4867 initializer for the first member of the union. */
4868 if (TREE_CODE (type) == UNION_TYPE)
4871 field = next_initializable_field (TREE_CHAIN (field));
4877 /* Subroutine of reshape_init, which processes a single initializer (part of
4878 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4879 iterator within the CONSTRUCTOR which points to the initializer to process.
4880 FIRST_INITIALIZER_P is true if this is the first initializer of the
4881 outermost CONSTRUCTOR node. */
4884 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4886 tree init = d->cur->value;
4888 if (error_operand_p (init))
4889 return error_mark_node;
4891 /* A non-aggregate type is always initialized with a single
4893 if (!CP_AGGREGATE_TYPE_P (type))
4895 /* It is invalid to initialize a non-aggregate type with a
4896 brace-enclosed initializer before C++0x.
4897 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4898 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4899 a CONSTRUCTOR (with a record type). */
4900 if (TREE_CODE (init) == CONSTRUCTOR
4901 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4903 if (SCALAR_TYPE_P (type))
4905 error ("braces around scalar initializer for type %qT", type);
4906 init = error_mark_node;
4909 maybe_warn_cpp0x ("extended initializer lists");
4918 All implicit type conversions (clause _conv_) are considered when
4919 initializing the aggregate member with an initializer from an
4920 initializer-list. If the initializer can initialize a member,
4921 the member is initialized. Otherwise, if the member is itself a
4922 non-empty subaggregate, brace elision is assumed and the
4923 initializer is considered for the initialization of the first
4924 member of the subaggregate. */
4925 if (TREE_CODE (init) != CONSTRUCTOR
4926 /* But don't try this for the first initializer, since that would be
4927 looking through the outermost braces; A a2 = { a1 }; is not a
4928 valid aggregate initialization. */
4929 && !first_initializer_p
4930 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4936 /* [dcl.init.string]
4938 A char array (whether plain char, signed char, or unsigned char)
4939 can be initialized by a string-literal (optionally enclosed in
4940 braces); a wchar_t array can be initialized by a wide
4941 string-literal (optionally enclosed in braces). */
4942 if (TREE_CODE (type) == ARRAY_TYPE
4943 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4945 tree str_init = init;
4947 /* Strip one level of braces if and only if they enclose a single
4948 element (as allowed by [dcl.init.string]). */
4949 if (!first_initializer_p
4950 && TREE_CODE (str_init) == CONSTRUCTOR
4951 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4953 str_init = VEC_index (constructor_elt,
4954 CONSTRUCTOR_ELTS (str_init), 0)->value;
4957 /* If it's a string literal, then it's the initializer for the array
4958 as a whole. Otherwise, continue with normal initialization for
4959 array types (one value per array element). */
4960 if (TREE_CODE (str_init) == STRING_CST)
4967 /* The following cases are about aggregates. If we are not within a full
4968 initializer already, and there is not a CONSTRUCTOR, it means that there
4969 is a missing set of braces (that is, we are processing the case for
4970 which reshape_init exists). */
4971 if (!first_initializer_p)
4973 if (TREE_CODE (init) == CONSTRUCTOR)
4975 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4976 /* There is no need to reshape pointer-to-member function
4977 initializers, as they are always constructed correctly
4978 by the front end. */
4980 else if (COMPOUND_LITERAL_P (init))
4981 /* For a nested compound literal, there is no need to reshape since
4982 brace elision is not allowed. Even if we decided to allow it,
4983 we should add a call to reshape_init in finish_compound_literal,
4984 before calling digest_init, so changing this code would still
4985 not be necessary. */
4986 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4990 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4991 return reshape_init (type, init);
4995 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4999 /* Dispatch to specialized routines. */
5000 if (CLASS_TYPE_P (type))
5001 return reshape_init_class (type, d, first_initializer_p);
5002 else if (TREE_CODE (type) == ARRAY_TYPE)
5003 return reshape_init_array (type, d);
5004 else if (TREE_CODE (type) == VECTOR_TYPE)
5005 return reshape_init_vector (type, d);
5010 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5011 brace-enclosed aggregate initializer.
5013 INIT is the CONSTRUCTOR containing the list of initializers describing
5014 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5015 It may not presently match the shape of the TYPE; for example:
5017 struct S { int a; int b; };
5018 struct S a[] = { 1, 2, 3, 4 };
5020 Here INIT will hold a VEC of four elements, rather than a
5021 VEC of two elements, each itself a VEC of two elements. This
5022 routine transforms INIT from the former form into the latter. The
5023 revised CONSTRUCTOR node is returned. */
5026 reshape_init (tree type, tree init)
5028 VEC(constructor_elt, gc) *v;
5032 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5034 v = CONSTRUCTOR_ELTS (init);
5036 /* An empty constructor does not need reshaping, and it is always a valid
5038 if (VEC_empty (constructor_elt, v))
5041 /* Recurse on this CONSTRUCTOR. */
5042 d.cur = VEC_index (constructor_elt, v, 0);
5043 d.end = d.cur + VEC_length (constructor_elt, v);
5045 new_init = reshape_init_r (type, &d, true);
5046 if (new_init == error_mark_node)
5047 return error_mark_node;
5049 /* Make sure all the element of the constructor were used. Otherwise,
5050 issue an error about exceeding initializers. */
5052 error ("too many initializers for %qT", type);
5057 /* Verify array initializer. Returns true if errors have been reported. */
5060 check_array_initializer (tree decl, tree type, tree init)
5062 tree element_type = TREE_TYPE (type);
5064 /* The array type itself need not be complete, because the
5065 initializer may tell us how many elements are in the array.
5066 But, the elements of the array must be complete. */
5067 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5070 error ("elements of array %q#D have incomplete type", decl);
5072 error ("elements of array %q#T have incomplete type", type);
5075 /* It is not valid to initialize a VLA. */
5077 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5078 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5081 error ("variable-sized object %qD may not be initialized", decl);
5083 error ("variable-sized compound literal");
5089 /* Subroutine of check_initializer; args are passed down from that function.
5090 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5093 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5096 int saved_stmts_are_full_exprs_p = 0;
5097 if (building_stmt_tree ())
5099 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5100 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5102 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5103 if (building_stmt_tree ())
5104 current_stmt_tree ()->stmts_are_full_exprs_p =
5105 saved_stmts_are_full_exprs_p;
5109 /* Verify INIT (the initializer for DECL), and record the
5110 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5111 grok_reference_init.
5113 If the return value is non-NULL, it is an expression that must be
5114 evaluated dynamically to initialize DECL. */
5117 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5119 tree type = TREE_TYPE (decl);
5120 tree init_code = NULL;
5122 /* Things that are going to be initialized need to have complete
5124 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5126 if (type == error_mark_node)
5127 /* We will have already complained. */
5130 if (TREE_CODE (type) == ARRAY_TYPE)
5132 if (check_array_initializer (decl, type, init))
5135 else if (!COMPLETE_TYPE_P (type))
5137 error ("%qD has incomplete type", decl);
5138 TREE_TYPE (decl) = error_mark_node;
5142 /* There is no way to make a variable-sized class type in GNU C++. */
5143 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5145 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5147 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5148 if (SCALAR_TYPE_P (type))
5152 maybe_warn_cpp0x ("extended initializer lists");
5153 init = build_zero_init (type, NULL_TREE, false);
5155 else if (init_len != 1)
5157 error ("scalar object %qD requires one element in initializer",
5159 TREE_TYPE (decl) = error_mark_node;
5165 if (TREE_CODE (decl) == CONST_DECL)
5167 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5169 DECL_INITIAL (decl) = init;
5171 gcc_assert (init != NULL_TREE);
5174 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5175 init = grok_reference_init (decl, type, init, cleanup);
5178 /* Do not reshape constructors of vectors (they don't need to be
5180 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5182 if (is_std_init_list (type))
5183 return build_init_list_var_init (decl, type, init, cleanup);
5184 else if (TYPE_NON_AGGREGATE_CLASS (type))
5186 /* Don't reshape if the class has constructors. */
5187 if (cxx_dialect == cxx98)
5188 error ("in C++98 %qD must be initialized by constructor, "
5191 init = build_tree_list (NULL_TREE, init);
5193 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5195 error ("opaque vector types cannot be initialized");
5196 init = error_mark_node;
5199 init = reshape_init (type, init);
5202 /* If DECL has an array type without a specific bound, deduce the
5203 array size from the initializer. */
5204 maybe_deduce_size_from_array_init (decl, init);
5205 type = TREE_TYPE (decl);
5206 if (type == error_mark_node)
5209 if (TYPE_NEEDS_CONSTRUCTING (type)
5210 || (CLASS_TYPE_P (type)
5211 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5212 return build_aggr_init_full_exprs (decl, init, flags);
5213 else if (TREE_CODE (init) != TREE_VEC)
5215 init_code = store_init_value (decl, init, flags);
5216 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5217 && DECL_INITIAL (decl)
5218 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5219 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5220 warning (0, "array %qD initialized by parenthesized string literal %qE",
5221 decl, DECL_INITIAL (decl));
5225 else if (DECL_EXTERNAL (decl))
5227 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5228 return build_aggr_init_full_exprs (decl, init, flags);
5229 else if (MAYBE_CLASS_TYPE_P (type))
5231 tree core_type = strip_array_types (type);
5233 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5234 error ("structure %qD with uninitialized const members", decl);
5235 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5236 error ("structure %qD with uninitialized reference members", decl);
5238 check_for_uninitialized_const_var (decl);
5241 check_for_uninitialized_const_var (decl);
5243 if (init && init != error_mark_node)
5244 init_code = build2 (INIT_EXPR, type, decl, init);
5249 /* If DECL is not a local variable, give it RTL. */
5252 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5254 int toplev = toplevel_bindings_p ();
5256 const char *filename;
5258 /* Set the DECL_ASSEMBLER_NAME for the object. */
5261 /* The `register' keyword, when used together with an
5262 asm-specification, indicates that the variable should be
5263 placed in a particular register. */
5264 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5266 set_user_assembler_name (decl, asmspec);
5267 DECL_HARD_REGISTER (decl) = 1;
5271 if (TREE_CODE (decl) == FUNCTION_DECL
5272 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5273 set_builtin_user_assembler_name (decl, asmspec);
5274 set_user_assembler_name (decl, asmspec);
5278 /* Handle non-variables up front. */
5279 if (TREE_CODE (decl) != VAR_DECL)
5281 rest_of_decl_compilation (decl, toplev, at_eof);
5285 /* If we see a class member here, it should be a static data
5287 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5289 gcc_assert (TREE_STATIC (decl));
5290 /* An in-class declaration of a static data member should be
5291 external; it is only a declaration, and not a definition. */
5292 if (init == NULL_TREE)
5293 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5296 /* We don't create any RTL for local variables. */
5297 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5300 /* We defer emission of local statics until the corresponding
5301 DECL_EXPR is expanded. */
5302 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5304 /* We try to defer namespace-scope static constants so that they are
5305 not emitted into the object file unnecessarily. */
5306 filename = input_filename;
5307 if (!DECL_VIRTUAL_P (decl)
5308 && TREE_READONLY (decl)
5309 && DECL_INITIAL (decl) != NULL_TREE
5310 && DECL_INITIAL (decl) != error_mark_node
5312 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5314 && !TREE_PUBLIC (decl))
5316 /* Fool with the linkage of static consts according to #pragma
5318 struct c_fileinfo *finfo = get_fileinfo (filename);
5319 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5321 TREE_PUBLIC (decl) = 1;
5322 DECL_EXTERNAL (decl) = finfo->interface_only;
5327 /* Likewise for template instantiations. */
5328 else if (DECL_LANG_SPECIFIC (decl)
5329 && DECL_IMPLICIT_INSTANTIATION (decl))
5332 /* If we're not deferring, go ahead and assemble the variable. */
5334 rest_of_decl_compilation (decl, toplev, at_eof);
5337 /* walk_tree helper for wrap_temporary_cleanups, below. */
5340 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5342 if (TYPE_P (*stmt_p))
5348 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5350 tree guard = (tree)data;
5351 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5353 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5354 /* Tell honor_protect_cleanup_actions to handle this as a separate
5356 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5358 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5364 /* We're initializing a local variable which has a cleanup GUARD. If there
5365 are any temporaries used in the initializer INIT of this variable, we
5366 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5367 variable will be cleaned up properly if one of them throws.
5369 Unfortunately, there's no way to express this properly in terms of
5370 nesting, as the regions for the temporaries overlap the region for the
5371 variable itself; if there are two temporaries, the variable needs to be
5372 the first thing destroyed if either of them throws. However, we only
5373 want to run the variable's cleanup if it actually got constructed. So
5374 we need to guard the temporary cleanups with the variable's cleanup if
5375 they are run on the normal path, but not if they are run on the
5376 exceptional path. We implement this by telling
5377 honor_protect_cleanup_actions to strip the variable cleanup from the
5378 exceptional path. */
5381 wrap_temporary_cleanups (tree init, tree guard)
5383 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5386 /* Generate code to initialize DECL (a local variable). */
5389 initialize_local_var (tree decl, tree init)
5391 tree type = TREE_TYPE (decl);
5395 gcc_assert (TREE_CODE (decl) == VAR_DECL
5396 || TREE_CODE (decl) == RESULT_DECL);
5397 gcc_assert (!TREE_STATIC (decl));
5399 if (DECL_SIZE (decl) == NULL_TREE)
5401 /* If we used it already as memory, it must stay in memory. */
5402 DECL_INITIAL (decl) = NULL_TREE;
5403 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5407 if (type == error_mark_node)
5410 /* Compute and store the initial value. */
5411 already_used = TREE_USED (decl) || TREE_USED (type);
5413 /* Generate a cleanup, if necessary. */
5414 cleanup = cxx_maybe_build_cleanup (decl);
5416 /* Perform the initialization. */
5419 int saved_stmts_are_full_exprs_p;
5421 /* If we're only initializing a single object, guard the destructors
5422 of any temporaries used in its initializer with its destructor.
5423 This isn't right for arrays because each element initialization is
5424 a full-expression. */
5425 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5426 wrap_temporary_cleanups (init, cleanup);
5428 gcc_assert (building_stmt_tree ());
5429 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5430 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5431 finish_expr_stmt (init);
5432 current_stmt_tree ()->stmts_are_full_exprs_p =
5433 saved_stmts_are_full_exprs_p;
5436 /* Set this to 0 so we can tell whether an aggregate which was
5437 initialized was ever used. Don't do this if it has a
5438 destructor, so we don't complain about the 'resource
5439 allocation is initialization' idiom. Now set
5440 attribute((unused)) on types so decls of that type will be
5441 marked used. (see TREE_USED, above.) */
5442 if (TYPE_NEEDS_CONSTRUCTING (type)
5444 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5445 && DECL_NAME (decl))
5446 TREE_USED (decl) = 0;
5447 else if (already_used)
5448 TREE_USED (decl) = 1;
5451 finish_decl_cleanup (decl, cleanup);
5454 /* DECL is a VAR_DECL for a compiler-generated variable with static
5455 storage duration (like a virtual table) whose initializer is a
5456 compile-time constant. INIT must be either a TREE_LIST of values,
5457 or a CONSTRUCTOR. Initialize the variable and provide it to the
5461 initialize_artificial_var (tree decl, tree init)
5463 gcc_assert (DECL_ARTIFICIAL (decl));
5464 if (TREE_CODE (init) == TREE_LIST)
5465 init = build_constructor_from_list (TREE_TYPE (decl), init);
5466 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5467 DECL_INITIAL (decl) = init;
5468 DECL_INITIALIZED_P (decl) = 1;
5469 determine_visibility (decl);
5470 layout_var_decl (decl);
5471 maybe_commonize_var (decl);
5472 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5475 /* INIT is the initializer for a variable, as represented by the
5476 parser. Returns true iff INIT is value-dependent. */
5479 value_dependent_init_p (tree init)
5481 if (TREE_CODE (init) == TREE_LIST)
5482 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5483 return any_value_dependent_elements_p (init);
5484 else if (TREE_CODE (init) == CONSTRUCTOR)
5485 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5487 VEC(constructor_elt, gc) *elts;
5491 elts = CONSTRUCTOR_ELTS (init);
5492 nelts = VEC_length (constructor_elt, elts);
5493 for (i = 0; i < nelts; ++i)
5494 if (value_dependent_init_p (VEC_index (constructor_elt,
5499 /* It must be a simple expression, e.g., int i = 3; */
5500 return value_dependent_expression_p (init);
5505 /* Finish processing of a declaration;
5506 install its line number and initial value.
5507 If the length of an array type is not known before,
5508 it must be determined now, from the initial value, or it is an error.
5510 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5511 true, then INIT is an integral constant expression.
5513 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5514 if the (init) syntax was used. */
5517 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5518 tree asmspec_tree, int flags)
5522 const char *asmspec = NULL;
5523 int was_readonly = 0;
5524 bool var_definition_p = false;
5525 int saved_processing_template_decl;
5528 if (decl == error_mark_node)
5533 error ("assignment (not initialization) in declaration");
5537 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5538 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5539 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5541 type = TREE_TYPE (decl);
5542 if (type == error_mark_node)
5545 /* Assume no cleanup is required. */
5546 cleanup = NULL_TREE;
5547 saved_processing_template_decl = processing_template_decl;
5549 /* If a name was specified, get the string. */
5550 if (global_scope_p (current_binding_level))
5551 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5552 if (asmspec_tree && asmspec_tree != error_mark_node)
5553 asmspec = TREE_STRING_POINTER (asmspec_tree);
5555 if (current_class_type
5556 && CP_DECL_CONTEXT (decl) == current_class_type
5557 && TYPE_BEING_DEFINED (current_class_type)
5558 && (DECL_INITIAL (decl) || init))
5559 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5561 auto_node = type_uses_auto (type);
5564 if (init == NULL_TREE)
5566 error ("declaration of %q#D has no initializer", decl);
5567 TREE_TYPE (decl) = error_mark_node;
5570 if (TREE_CODE (init) == TREE_LIST)
5571 init = build_x_compound_expr_from_list (init, "initializer");
5572 if (describable_type (init))
5574 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5575 if (type == error_mark_node)
5580 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5582 if (init == ridpointers[(int)RID_DELETE])
5584 /* FIXME check this is 1st decl. */
5585 DECL_DELETED_FN (decl) = 1;
5586 DECL_DECLARED_INLINE_P (decl) = 1;
5587 DECL_INITIAL (decl) = error_mark_node;
5590 else if (init == ridpointers[(int)RID_DEFAULT])
5592 if (!defaultable_fn_p (decl))
5594 error ("%qD cannot be defaulted", decl);
5595 DECL_INITIAL (decl) = NULL_TREE;
5598 DECL_DEFAULTED_FN (decl) = 1;
5602 if (processing_template_decl)
5604 bool type_dependent_p;
5606 /* Add this declaration to the statement-tree. */
5607 if (at_function_scope_p ())
5608 add_decl_expr (decl);
5610 type_dependent_p = dependent_type_p (type);
5612 if (check_for_bare_parameter_packs (init))
5615 DECL_INITIAL (decl) = NULL_TREE;
5618 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5620 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5621 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5622 TREE_CONSTANT (decl) = 1;
5625 /* Generally, initializers in templates are expanded when the
5626 template is instantiated. But, if DECL is an integral
5627 constant static data member, then it can be used in future
5628 integral constant expressions, and its value must be
5631 && DECL_CLASS_SCOPE_P (decl)
5632 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5633 && !type_dependent_p
5634 && !value_dependent_init_p (init)))
5637 DECL_INITIAL (decl) = init;
5638 if (TREE_CODE (decl) == VAR_DECL
5639 && !DECL_PRETTY_FUNCTION_P (decl)
5640 && !type_dependent_p)
5641 maybe_deduce_size_from_array_init (decl, init);
5645 if (TREE_CODE (init) == TREE_LIST)
5647 /* If the parenthesized-initializer form was used (e.g.,
5648 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5649 arguments. (There is generally only one.) We convert them
5652 for (; list; list = TREE_CHAIN (list))
5654 tree elt = TREE_VALUE (list);
5655 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5659 init = fold_non_dependent_expr (init);
5660 processing_template_decl = 0;
5663 /* Take care of TYPE_DECLs up front. */
5664 if (TREE_CODE (decl) == TYPE_DECL)
5666 if (type != error_mark_node
5667 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5669 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5670 warning (0, "shadowing previous type declaration of %q#D", decl);
5671 set_identifier_type_value (DECL_NAME (decl), decl);
5674 /* If we have installed this as the canonical typedef for this
5675 type, and that type has not been defined yet, delay emitting
5676 the debug information for it, as we will emit it later. */
5677 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5678 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5679 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5681 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5686 /* A reference will be modified here, as it is initialized. */
5687 if (! DECL_EXTERNAL (decl)
5688 && TREE_READONLY (decl)
5689 && TREE_CODE (type) == REFERENCE_TYPE)
5692 TREE_READONLY (decl) = 0;
5695 if (TREE_CODE (decl) == VAR_DECL)
5697 /* Only variables with trivial initialization and destruction can
5698 have thread-local storage. */
5699 if (DECL_THREAD_LOCAL_P (decl)
5700 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5701 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5702 error ("%qD cannot be thread-local because it has non-trivial "
5703 "type %qT", decl, TREE_TYPE (decl));
5704 /* If this is a local variable that will need a mangled name,
5705 register it now. We must do this before processing the
5706 initializer for the variable, since the initialization might
5707 require a guard variable, and since the mangled name of the
5708 guard variable will depend on the mangled name of this
5710 if (DECL_FUNCTION_SCOPE_P (decl)
5711 && TREE_STATIC (decl)
5712 && !DECL_ARTIFICIAL (decl))
5713 push_local_name (decl);
5714 /* Convert the initializer to the type of DECL, if we have not
5715 already initialized DECL. */
5716 if (!DECL_INITIALIZED_P (decl)
5717 /* If !DECL_EXTERNAL then DECL is being defined. In the
5718 case of a static data member initialized inside the
5719 class-specifier, there can be an initializer even if DECL
5720 is *not* defined. */
5721 && (!DECL_EXTERNAL (decl) || init))
5723 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5726 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5727 /* Allow libjava/prims.cc define primitive classes. */
5728 if (init != NULL_TREE
5729 || jclass == NULL_TREE
5730 || TREE_CODE (jclass) != TYPE_DECL
5731 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5732 || !same_type_ignoring_top_level_qualifiers_p
5733 (type, TREE_TYPE (TREE_TYPE (jclass))))
5734 error ("Java object %qD not allocated with %<new%>", decl);
5739 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5740 if (init_const_expr_p)
5742 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5743 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5744 TREE_CONSTANT (decl) = 1;
5747 init = check_initializer (decl, init, flags, &cleanup);
5748 /* Thread-local storage cannot be dynamically initialized. */
5749 if (DECL_THREAD_LOCAL_P (decl) && init)
5751 error ("%qD is thread-local and so cannot be dynamically "
5752 "initialized", decl);
5756 /* Check that the initializer for a static data member was a
5757 constant. Although we check in the parser that the
5758 initializer is an integral constant expression, we do not
5759 simplify division-by-zero at the point at which it
5760 occurs. Therefore, in:
5762 struct S { static const int i = 7 / 0; };
5764 we issue an error at this point. It would
5765 probably be better to forbid division by zero in
5766 integral constant expressions. */
5767 if (DECL_EXTERNAL (decl) && init)
5769 error ("%qD cannot be initialized by a non-constant expression"
5770 " when being declared", decl);
5771 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5779 The memory occupied by any object of static storage
5780 duration is zero-initialized at program startup before
5781 any other initialization takes place.
5783 We cannot create an appropriate initializer until after
5784 the type of DECL is finalized. If DECL_INITIAL is set,
5785 then the DECL is statically initialized, and any
5786 necessary zero-initialization has already been performed. */
5787 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5788 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5789 /*nelts=*/NULL_TREE,
5790 /*static_storage_p=*/true);
5791 /* Remember that the initialization for this variable has
5793 DECL_INITIALIZED_P (decl) = 1;
5794 /* This declaration is the definition of this variable,
5795 unless we are initializing a static data member within
5796 the class specifier. */
5797 if (!DECL_EXTERNAL (decl))
5798 var_definition_p = true;
5800 /* If the variable has an array type, lay out the type, even if
5801 there is no initializer. It is valid to index through the
5802 array, and we must get TYPE_ALIGN set correctly on the array
5804 else if (TREE_CODE (type) == ARRAY_TYPE)
5807 else if (TREE_CODE (decl) == FIELD_DECL
5808 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5809 error ("non-static data member %qD has Java class type", decl);
5811 /* Add this declaration to the statement-tree. This needs to happen
5812 after the call to check_initializer so that the DECL_EXPR for a
5813 reference temp is added before the DECL_EXPR for the reference itself. */
5814 if (at_function_scope_p ())
5815 add_decl_expr (decl);
5817 /* Let the middle end know about variables and functions -- but not
5818 static data members in uninstantiated class templates. */
5819 if (!saved_processing_template_decl
5820 && (TREE_CODE (decl) == VAR_DECL
5821 || TREE_CODE (decl) == FUNCTION_DECL))
5823 if (TREE_CODE (decl) == VAR_DECL)
5825 layout_var_decl (decl);
5826 maybe_commonize_var (decl);
5829 /* This needs to happen after the linkage is set. */
5830 determine_visibility (decl);
5832 if (var_definition_p && TREE_STATIC (decl))
5834 /* If a TREE_READONLY variable needs initialization
5835 at runtime, it is no longer readonly and we need to
5836 avoid MEM_READONLY_P being set on RTL created for it. */
5839 if (TREE_READONLY (decl))
5840 TREE_READONLY (decl) = 0;
5843 else if (was_readonly)
5844 TREE_READONLY (decl) = 1;
5847 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5849 /* Check for abstractness of the type. Notice that there is no
5850 need to strip array types here since the check for those types
5851 is already done within create_array_type_for_decl. */
5852 if (TREE_CODE (type) == FUNCTION_TYPE
5853 || TREE_CODE (type) == METHOD_TYPE)
5854 abstract_virtuals_error (decl, TREE_TYPE (type));
5856 abstract_virtuals_error (decl, type);
5858 if (TREE_TYPE (decl) == error_mark_node)
5859 /* No initialization required. */
5861 else if (TREE_CODE (decl) == FUNCTION_DECL)
5865 if (init == ridpointers[(int)RID_DEFAULT])
5867 /* An out-of-class default definition is defined at
5868 the point where it is explicitly defaulted. */
5869 if (DECL_INITIAL (decl) == error_mark_node)
5870 synthesize_method (decl);
5873 error ("function %q#D is initialized like a variable", decl);
5875 /* else no initialization required. */
5877 else if (DECL_EXTERNAL (decl)
5878 && ! (DECL_LANG_SPECIFIC (decl)
5879 && DECL_NOT_REALLY_EXTERN (decl)))
5882 DECL_INITIAL (decl) = init;
5884 /* A variable definition. */
5885 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5886 /* Initialize the local variable. */
5887 initialize_local_var (decl, init);
5889 /* If a variable is defined, and then a subsequent
5890 definition with external linkage is encountered, we will
5891 get here twice for the same variable. We want to avoid
5892 calling expand_static_init more than once. For variables
5893 that are not static data members, we can call
5894 expand_static_init only when we actually process the
5895 initializer. It is not legal to redeclare a static data
5896 member, so this issue does not arise in that case. */
5897 else if (var_definition_p && TREE_STATIC (decl))
5898 expand_static_init (decl, init);
5901 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5902 reference, insert it in the statement-tree now. */
5904 push_cleanup (decl, cleanup, false);
5907 processing_template_decl = saved_processing_template_decl;
5910 TREE_READONLY (decl) = 1;
5912 /* If this was marked 'used', be sure it will be output. */
5913 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5914 mark_decl_referenced (decl);
5917 /* Returns a declaration for a VAR_DECL as if:
5919 extern "C" TYPE NAME;
5921 had been seen. Used to create compiler-generated global
5925 declare_global_var (tree name, tree type)
5929 push_to_top_level ();
5930 decl = build_decl (input_location, VAR_DECL, name, type);
5931 TREE_PUBLIC (decl) = 1;
5932 DECL_EXTERNAL (decl) = 1;
5933 DECL_ARTIFICIAL (decl) = 1;
5934 /* If the user has explicitly declared this variable (perhaps
5935 because the code we are compiling is part of a low-level runtime
5936 library), then it is possible that our declaration will be merged
5937 with theirs by pushdecl. */
5938 decl = pushdecl (decl);
5939 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5940 pop_from_top_level ();
5945 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5946 if "__cxa_atexit" is not being used) corresponding to the function
5947 to be called when the program exits. */
5950 get_atexit_fn_ptr_type (void)
5955 if (!atexit_fn_ptr_type_node)
5957 if (flag_use_cxa_atexit
5958 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5959 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5960 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5962 /* The parameter to "atexit" is "void (*)(void)". */
5963 arg_types = void_list_node;
5965 fn_type = build_function_type (void_type_node, arg_types);
5966 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5969 return atexit_fn_ptr_type_node;
5972 /* Returns a pointer to the `atexit' function. Note that if
5973 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5974 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5977 get_atexit_node (void)
5984 bool use_aeabi_atexit;
5989 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5991 /* The declaration for `__cxa_atexit' is:
5993 int __cxa_atexit (void (*)(void *), void *, void *)
5995 We build up the argument types and then then function type
5998 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5999 /* First, build the pointer-to-function type for the first
6001 fn_ptr_type = get_atexit_fn_ptr_type ();
6002 /* Then, build the rest of the argument types. */
6003 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6004 if (use_aeabi_atexit)
6006 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6007 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6011 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6012 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6014 /* And the final __cxa_atexit type. */
6015 fn_type = build_function_type (integer_type_node, arg_types);
6016 fn_ptr_type = build_pointer_type (fn_type);
6017 if (use_aeabi_atexit)
6018 name = "__aeabi_atexit";
6020 name = "__cxa_atexit";
6024 /* The declaration for `atexit' is:
6026 int atexit (void (*)());
6028 We build up the argument types and then then function type
6030 fn_ptr_type = get_atexit_fn_ptr_type ();
6031 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6032 /* Build the final atexit type. */
6033 fn_type = build_function_type (integer_type_node, arg_types);
6037 /* Now, build the function declaration. */
6038 push_lang_context (lang_name_c);
6039 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6040 mark_used (atexit_fndecl);
6041 pop_lang_context ();
6042 atexit_node = decay_conversion (atexit_fndecl);
6047 /* Returns the __dso_handle VAR_DECL. */
6050 get_dso_handle_node (void)
6052 if (dso_handle_node)
6053 return dso_handle_node;
6055 /* Declare the variable. */
6056 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6059 return dso_handle_node;
6062 /* Begin a new function with internal linkage whose job will be simply
6063 to destroy some particular variable. */
6065 static GTY(()) int start_cleanup_cnt;
6068 start_cleanup_fn (void)
6073 bool use_cxa_atexit = flag_use_cxa_atexit
6074 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6076 push_to_top_level ();
6078 /* No need to mangle this. */
6079 push_lang_context (lang_name_c);
6081 /* Build the name of the function. */
6082 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6083 /* Build the function declaration. */
6084 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6085 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6086 /* It's a function with internal linkage, generated by the
6088 TREE_PUBLIC (fndecl) = 0;
6089 DECL_ARTIFICIAL (fndecl) = 1;
6090 /* Make the function `inline' so that it is only emitted if it is
6091 actually needed. It is unlikely that it will be inlined, since
6092 it is only called via a function pointer, but we avoid unnecessary
6093 emissions this way. */
6094 DECL_DECLARED_INLINE_P (fndecl) = 1;
6095 DECL_INTERFACE_KNOWN (fndecl) = 1;
6096 /* Build the parameter. */
6101 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6102 DECL_CONTEXT (parmdecl) = fndecl;
6103 TREE_USED (parmdecl) = 1;
6104 DECL_ARGUMENTS (fndecl) = parmdecl;
6108 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6110 pop_lang_context ();
6112 return current_function_decl;
6115 /* Finish the cleanup function begun by start_cleanup_fn. */
6118 end_cleanup_fn (void)
6120 expand_or_defer_fn (finish_function (0));
6122 pop_from_top_level ();
6125 /* Generate code to handle the destruction of DECL, an object with
6126 static storage duration. */
6129 register_dtor_fn (tree decl)
6138 type = TREE_TYPE (decl);
6139 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6140 return void_zero_node;
6142 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6143 a class object, we can just pass the destructor to
6144 "__cxa_atexit"; we don't have to build a temporary function to do
6146 use_dtor = (flag_use_cxa_atexit
6147 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6148 && CLASS_TYPE_P (type));
6153 /* Find the destructor. */
6154 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6155 gcc_assert (idx >= 0);
6156 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6157 /* Make sure it is accessible. */
6158 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6162 /* Call build_cleanup before we enter the anonymous function so
6163 that any access checks will be done relative to the current
6164 scope, rather than the scope of the anonymous function. */
6165 build_cleanup (decl);
6167 /* Now start the function. */
6168 cleanup = start_cleanup_fn ();
6170 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6171 to the original function, rather than the anonymous one. That
6172 will make the back end think that nested functions are in use,
6173 which causes confusion. */
6174 push_deferring_access_checks (dk_no_check);
6175 fcall = build_cleanup (decl);
6176 pop_deferring_access_checks ();
6178 /* Create the body of the anonymous function. */
6179 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6180 finish_expr_stmt (fcall);
6181 finish_compound_stmt (compound_stmt);
6185 /* Call atexit with the cleanup function. */
6186 mark_used (cleanup);
6187 cleanup = build_address (cleanup);
6188 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6194 /* We must convert CLEANUP to the type that "__cxa_atexit"
6196 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6197 /* "__cxa_atexit" will pass the address of DECL to the
6198 cleanup function. */
6200 addr = build_address (decl);
6201 /* The declared type of the parameter to "__cxa_atexit" is
6202 "void *". For plain "T*", we could just let the
6203 machinery in cp_build_function_call convert it -- but if the
6204 type is "cv-qualified T *", then we need to convert it
6205 before passing it in, to avoid spurious errors. */
6206 addr = build_nop (ptr_type_node, addr);
6209 /* Since the cleanup functions we build ignore the address
6210 they're given, there's no reason to pass the actual address
6211 in, and, in general, it's cheaper to pass NULL than any
6213 addr = null_pointer_node;
6214 args = tree_cons (NULL_TREE,
6215 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6216 tf_warning_or_error),
6218 if (targetm.cxx.use_aeabi_atexit ())
6220 args = tree_cons (NULL_TREE, cleanup, args);
6221 args = tree_cons (NULL_TREE, addr, args);
6225 args = tree_cons (NULL_TREE, addr, args);
6226 args = tree_cons (NULL_TREE, cleanup, args);
6230 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6231 return cp_build_function_call (get_atexit_node (), args,
6232 tf_warning_or_error);
6235 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6236 is its initializer. Generate code to handle the construction
6237 and destruction of DECL. */
6240 expand_static_init (tree decl, tree init)
6242 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6243 gcc_assert (TREE_STATIC (decl));
6245 /* Some variables require no initialization. */
6247 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6248 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6251 if (DECL_FUNCTION_SCOPE_P (decl))
6253 /* Emit code to perform this initialization but once. */
6254 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6255 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6256 tree guard, guard_addr;
6257 tree acquire_fn, release_fn, abort_fn;
6260 /* Emit code to perform this initialization but once. This code
6263 static <type> guard;
6264 if (!guard.first_byte) {
6265 if (__cxa_guard_acquire (&guard)) {
6268 // Do initialization.
6269 flag = true; __cxa_guard_release (&guard);
6270 // Register variable for destruction at end of program.
6272 if (!flag) __cxa_guard_abort (&guard);
6276 Note that the `flag' variable is only set to 1 *after* the
6277 initialization is complete. This ensures that an exception,
6278 thrown during the construction, will cause the variable to
6279 reinitialized when we pass through this code again, as per:
6283 If the initialization exits by throwing an exception, the
6284 initialization is not complete, so it will be tried again
6285 the next time control enters the declaration.
6287 This process should be thread-safe, too; multiple threads
6288 should not be able to initialize the variable more than
6291 /* Create the guard variable. */
6292 guard = get_guard (decl);
6294 /* This optimization isn't safe on targets with relaxed memory
6295 consistency. On such targets we force synchronization in
6296 __cxa_guard_acquire. */
6297 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6299 /* Begin the conditional initialization. */
6300 if_stmt = begin_if_stmt ();
6301 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6302 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6305 if (flag_threadsafe_statics)
6307 guard_addr = build_address (guard);
6309 acquire_fn = get_identifier ("__cxa_guard_acquire");
6310 release_fn = get_identifier ("__cxa_guard_release");
6311 abort_fn = get_identifier ("__cxa_guard_abort");
6312 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6314 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6316 tree vfntype = build_function_type (void_type_node, argtypes);
6317 acquire_fn = push_library_fn
6318 (acquire_fn, build_function_type (integer_type_node, argtypes),
6320 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6321 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6325 release_fn = identifier_global_value (release_fn);
6326 abort_fn = identifier_global_value (abort_fn);
6329 inner_if_stmt = begin_if_stmt ();
6330 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6333 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6334 begin = get_target_expr (boolean_false_node);
6335 flag = TARGET_EXPR_SLOT (begin);
6337 TARGET_EXPR_CLEANUP (begin)
6338 = build3 (COND_EXPR, void_type_node, flag,
6340 build_call_n (abort_fn, 1, guard_addr));
6341 CLEANUP_EH_ONLY (begin) = 1;
6343 /* Do the initialization itself. */
6344 init = add_stmt_to_compound (begin, init);
6345 init = add_stmt_to_compound
6346 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6347 init = add_stmt_to_compound
6348 (init, build_call_n (release_fn, 1, guard_addr));
6351 init = add_stmt_to_compound (init, set_guard (guard));
6353 /* Use atexit to register a function for destroying this static
6355 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6357 finish_expr_stmt (init);
6359 if (flag_threadsafe_statics)
6361 finish_compound_stmt (inner_then_clause);
6362 finish_then_clause (inner_if_stmt);
6363 finish_if_stmt (inner_if_stmt);
6366 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6368 finish_compound_stmt (then_clause);
6369 finish_then_clause (if_stmt);
6370 finish_if_stmt (if_stmt);
6374 static_aggregates = tree_cons (init, decl, static_aggregates);
6378 /* Make TYPE a complete type based on INITIAL_VALUE.
6379 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6380 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6381 3 if the initializer list is empty (in pedantic mode). */
6384 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6387 tree type, elt_type;
6391 unsigned HOST_WIDE_INT i;
6394 /* An array of character type can be initialized from a
6395 brace-enclosed string constant.
6397 FIXME: this code is duplicated from reshape_init. Probably
6398 we should just call reshape_init here? */
6399 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6400 && TREE_CODE (initial_value) == CONSTRUCTOR
6401 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6403 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6404 tree value = VEC_index (constructor_elt, v, 0)->value;
6406 if (TREE_CODE (value) == STRING_CST
6407 && VEC_length (constructor_elt, v) == 1)
6408 initial_value = value;
6411 /* If any of the elements are parameter packs, we can't actually
6412 complete this type now because the array size is dependent. */
6413 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6415 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6418 if (PACK_EXPANSION_P (value))
6424 failure = complete_array_type (ptype, initial_value, do_default);
6426 /* We can create the array before the element type is complete, which
6427 means that we didn't have these two bits set in the original type
6428 either. In completing the type, we are expected to propagate these
6429 bits. See also complete_type which does the same thing for arrays
6432 if (TYPE_DOMAIN (type))
6434 elt_type = TREE_TYPE (type);
6435 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6436 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6437 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6443 /* Return zero if something is declared to be a member of type
6444 CTYPE when in the context of CUR_TYPE. STRING is the error
6445 message to print in that case. Otherwise, quietly return 1. */
6448 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6450 if (ctype && ctype != cur_type)
6452 if (flags == DTOR_FLAG)
6453 error ("destructor for alien class %qT cannot be a member", ctype);
6455 error ("constructor for alien class %qT cannot be a member", ctype);
6461 /* Subroutine of `grokdeclarator'. */
6463 /* Generate errors possibly applicable for a given set of specifiers.
6464 This is for ARM $7.1.2. */
6467 bad_specifiers (tree object,
6476 error ("%qD declared as a %<virtual%> %s", object, type);
6478 error ("%qD declared as an %<inline%> %s", object, type);
6480 error ("%<const%> and %<volatile%> function specifiers on "
6481 "%qD invalid in %s declaration",
6484 error ("%q+D declared as a friend", object);
6486 && (TREE_CODE (object) == TYPE_DECL
6487 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6488 && !TYPE_REFFN_P (TREE_TYPE (object))
6489 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6490 error ("%q+D declared with an exception specification", object);
6493 /* DECL is a member function or static data member and is presently
6494 being defined. Check that the definition is taking place in a
6498 check_class_member_definition_namespace (tree decl)
6500 /* These checks only apply to member functions and static data
6502 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6503 || TREE_CODE (decl) == VAR_DECL);
6504 /* We check for problems with specializations in pt.c in
6505 check_specialization_namespace, where we can issue better
6507 if (processing_specialization)
6509 /* There are no restrictions on the placement of
6510 explicit instantiations. */
6511 if (processing_explicit_instantiation)
6515 A member function definition that appears outside of the
6516 class definition shall appear in a namespace scope enclosing
6517 the class definition.
6521 The definition for a static data member shall appear in a
6522 namespace scope enclosing the member's class definition. */
6523 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6524 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6525 decl, DECL_CONTEXT (decl));
6528 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6529 METHOD_TYPE for a non-static member function; QUALS are the
6530 cv-qualifiers that apply to the function. */
6533 build_this_parm (tree type, cp_cv_quals quals)
6538 cp_cv_quals this_quals;
6540 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6541 /* The `this' parameter is implicitly `const'; it cannot be
6543 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6544 qual_type = cp_build_qualified_type (this_type, this_quals);
6545 parm = build_artificial_parm (this_identifier, qual_type);
6546 cp_apply_type_quals_to_decl (this_quals, parm);
6550 /* CTYPE is class type, or null if non-class.
6551 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6553 DECLARATOR is the function's name.
6554 PARMS is a chain of PARM_DECLs for the function.
6555 VIRTUALP is truthvalue of whether the function is virtual or not.
6556 FLAGS are to be passed through to `grokclassfn'.
6557 QUALS are qualifiers indicating whether the function is `const'
6559 RAISES is a list of exceptions that this function can raise.
6560 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6561 not look, and -1 if we should not call `grokclassfn' at all.
6563 SFK is the kind of special function (if any) for the new function.
6565 Returns `NULL_TREE' if something goes wrong, after issuing
6566 applicable error messages. */
6569 grokfndecl (tree ctype,
6573 tree orig_declarator,
6575 enum overload_flags flags,
6582 special_function_kind sfk,
6587 location_t location)
6590 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6594 type = build_exception_variant (type, raises);
6596 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6598 /* If we have an explicit location, use it, otherwise use whatever
6599 build_lang_decl used (probably input_location). */
6600 if (location != UNKNOWN_LOCATION)
6601 DECL_SOURCE_LOCATION (decl) = location;
6603 if (TREE_CODE (type) == METHOD_TYPE)
6606 parm = build_this_parm (type, quals);
6607 TREE_CHAIN (parm) = parms;
6610 DECL_ARGUMENTS (decl) = parms;
6611 for (t = parms; t; t = TREE_CHAIN (t))
6612 DECL_CONTEXT (t) = decl;
6613 /* Propagate volatile out from type to decl. */
6614 if (TYPE_VOLATILE (type))
6615 TREE_THIS_VOLATILE (decl) = 1;
6617 /* Setup decl according to sfk. */
6620 case sfk_constructor:
6621 case sfk_copy_constructor:
6622 DECL_CONSTRUCTOR_P (decl) = 1;
6624 case sfk_destructor:
6625 DECL_DESTRUCTOR_P (decl) = 1;
6631 /* If pointers to member functions use the least significant bit to
6632 indicate whether a function is virtual, ensure a pointer
6633 to this function will have that bit clear. */
6634 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6635 && TREE_CODE (type) == METHOD_TYPE
6636 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6637 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6640 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6644 ("defining explicit specialization %qD in friend declaration",
6648 tree fns = TREE_OPERAND (orig_declarator, 0);
6649 tree args = TREE_OPERAND (orig_declarator, 1);
6651 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6653 /* Something like `template <class T> friend void f<T>()'. */
6654 error ("invalid use of template-id %qD in declaration "
6655 "of primary template",
6661 /* A friend declaration of the form friend void f<>(). Record
6662 the information in the TEMPLATE_ID_EXPR. */
6663 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6665 if (TREE_CODE (fns) == COMPONENT_REF)
6667 /* Due to bison parser ickiness, we will have already looked
6668 up an operator_name or PFUNCNAME within the current class
6669 (see template_id in parse.y). If the current class contains
6670 such a name, we'll get a COMPONENT_REF here. Undo that. */
6672 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6673 == current_class_type);
6674 fns = TREE_OPERAND (fns, 1);
6676 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6677 || TREE_CODE (fns) == OVERLOAD);
6678 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6680 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6681 if (TREE_PURPOSE (t)
6682 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6684 error ("default arguments are not allowed in declaration "
6685 "of friend template specialization %qD",
6692 error ("%<inline%> is not allowed in declaration of friend "
6693 "template specialization %qD",
6700 /* If this decl has namespace scope, set that up. */
6702 set_decl_namespace (decl, in_namespace, friendp);
6704 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6706 /* `main' and builtins have implicit 'C' linkage. */
6707 if ((MAIN_NAME_P (declarator)
6708 || (IDENTIFIER_LENGTH (declarator) > 10
6709 && IDENTIFIER_POINTER (declarator)[0] == '_'
6710 && IDENTIFIER_POINTER (declarator)[1] == '_'
6711 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6712 && current_lang_name == lang_name_cplusplus
6713 && ctype == NULL_TREE
6714 /* NULL_TREE means global namespace. */
6715 && DECL_CONTEXT (decl) == NULL_TREE)
6716 SET_DECL_LANGUAGE (decl, lang_c);
6718 /* Should probably propagate const out from type to decl I bet (mrs). */
6721 DECL_STATIC_FUNCTION_P (decl) = 1;
6722 DECL_CONTEXT (decl) = ctype;
6727 DECL_CONTEXT (decl) = ctype;
6729 check_class_member_definition_namespace (decl);
6732 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6734 if (processing_template_decl)
6735 error ("cannot declare %<::main%> to be a template");
6737 error ("cannot declare %<::main%> to be inline");
6739 error ("cannot declare %<::main%> to be static");
6744 /* Members of anonymous types and local classes have no linkage; make
6745 them internal. If a typedef is made later, this will be changed. */
6746 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6747 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6752 /* [basic.link]: A name with no linkage (notably, the name of a class
6753 or enumeration declared in a local scope) shall not be used to
6754 declare an entity with linkage.
6756 Only check this for public decls for now. See core 319, 389. */
6757 t = no_linkage_check (TREE_TYPE (decl),
6758 /*relaxed_p=*/false);
6761 if (TYPE_ANONYMOUS_P (t))
6763 if (DECL_EXTERN_C_P (decl))
6764 /* Allow this; it's pretty common in C. */;
6767 permerror (input_location, "non-local function %q#D uses anonymous type",
6769 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6770 permerror (input_location, "%q+#D does not refer to the unqualified "
6771 "type, so it is not used for linkage",
6776 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6780 TREE_PUBLIC (decl) = publicp;
6783 DECL_INTERFACE_KNOWN (decl) = 1;
6784 DECL_NOT_REALLY_EXTERN (decl) = 1;
6787 /* If the declaration was declared inline, mark it as such. */
6789 DECL_DECLARED_INLINE_P (decl) = 1;
6791 DECL_EXTERNAL (decl) = 1;
6792 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6795 ? G_("static member function %qD cannot have cv-qualifier")
6796 : G_("non-member function %qD cannot have cv-qualifier"),
6798 quals = TYPE_UNQUALIFIED;
6801 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6802 && !grok_op_properties (decl, /*complain=*/true))
6805 if (ctype && decl_function_context (decl))
6806 DECL_NO_STATIC_CHAIN (decl) = 1;
6809 /* Make the init_value nonzero so pushdecl knows this is not
6810 tentative. error_mark_node is replaced later with the BLOCK. */
6811 DECL_INITIAL (decl) = error_mark_node;
6813 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6814 TREE_NOTHROW (decl) = 1;
6816 /* Caller will do the rest of this. */
6820 if (ctype != NULL_TREE)
6821 grokclassfn (ctype, decl, flags);
6823 decl = check_explicit_specialization (orig_declarator, decl,
6826 4 * (friendp != 0));
6827 if (decl == error_mark_node)
6832 cplus_decl_attributes (&decl, *attrlist, 0);
6833 *attrlist = NULL_TREE;
6836 /* Check main's type after attributes have been applied. */
6837 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6839 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6842 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6844 error ("%<::main%> must return %<int%>");
6845 newtype = build_function_type (integer_type_node, oldtypeargs);
6846 TREE_TYPE (decl) = newtype;
6849 check_main_parameter_types (decl);
6852 if (ctype != NULL_TREE
6853 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6856 tree old_decl = check_classfn (ctype, decl,
6857 (processing_template_decl
6858 > template_class_depth (ctype))
6859 ? current_template_parms
6862 if (old_decl == error_mark_node)
6870 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6871 /* Because grokfndecl is always supposed to return a
6872 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6873 here. We depend on our callers to figure out that its
6874 really a template that's being returned. */
6875 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6877 if (DECL_STATIC_FUNCTION_P (old_decl)
6878 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6879 /* Remove the `this' parm added by grokclassfn.
6880 XXX Isn't this done in start_function, too? */
6881 revert_static_member_fn (decl);
6882 if (DECL_ARTIFICIAL (old_decl))
6884 error ("definition of implicitly-declared %qD", old_decl);
6888 /* Since we've smashed OLD_DECL to its
6889 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6890 if (TREE_CODE (decl) == TEMPLATE_DECL)
6891 decl = DECL_TEMPLATE_RESULT (decl);
6893 /* Attempt to merge the declarations. This can fail, in
6894 the case of some invalid specialization declarations. */
6895 pushed_scope = push_scope (ctype);
6896 ok = duplicate_decls (decl, old_decl, friendp);
6898 pop_scope (pushed_scope);
6901 error ("no %q#D member function declared in class %qT",
6909 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6912 if (ctype == NULL_TREE || check)
6916 DECL_VIRTUAL_P (decl) = 1;
6921 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6922 the linkage that DECL will receive in the object file. */
6925 set_linkage_for_static_data_member (tree decl)
6927 /* A static data member always has static storage duration and
6928 external linkage. Note that static data members are forbidden in
6929 local classes -- the only situation in which a class has
6930 non-external linkage. */
6931 TREE_PUBLIC (decl) = 1;
6932 TREE_STATIC (decl) = 1;
6933 /* For non-template classes, static data members are always put
6934 out in exactly those files where they are defined, just as
6935 with ordinary namespace-scope variables. */
6936 if (!processing_template_decl)
6937 DECL_INTERFACE_KNOWN (decl) = 1;
6940 /* Create a VAR_DECL named NAME with the indicated TYPE.
6942 If SCOPE is non-NULL, it is the class type or namespace containing
6943 the variable. If SCOPE is NULL, the variable should is created in
6944 the innermost enclosings scope. */
6947 grokvardecl (tree type,
6949 const cp_decl_specifier_seq *declspecs,
6955 tree explicit_scope;
6957 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6959 /* Compute the scope in which to place the variable, but remember
6960 whether or not that scope was explicitly specified by the user. */
6961 explicit_scope = scope;
6964 /* An explicit "extern" specifier indicates a namespace-scope
6966 if (declspecs->storage_class == sc_extern)
6967 scope = current_namespace;
6968 else if (!at_function_scope_p ())
6969 scope = current_scope ();
6973 && (/* If the variable is a namespace-scope variable declared in a
6974 template, we need DECL_LANG_SPECIFIC. */
6975 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6976 /* Similarly for namespace-scope variables with language linkage
6978 || (TREE_CODE (scope) == NAMESPACE_DECL
6979 && current_lang_name != lang_name_cplusplus)
6980 /* Similarly for static data members. */
6982 decl = build_lang_decl (VAR_DECL, name, type);
6984 decl = build_decl (input_location, VAR_DECL, name, type);
6986 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6987 set_decl_namespace (decl, explicit_scope, 0);
6989 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6991 if (declspecs->storage_class == sc_extern)
6993 DECL_THIS_EXTERN (decl) = 1;
6994 DECL_EXTERNAL (decl) = !initialized;
6997 if (DECL_CLASS_SCOPE_P (decl))
6999 set_linkage_for_static_data_member (decl);
7000 /* This function is only called with out-of-class definitions. */
7001 DECL_EXTERNAL (decl) = 0;
7002 check_class_member_definition_namespace (decl);
7004 /* At top level, either `static' or no s.c. makes a definition
7005 (perhaps tentative), and absence of `static' makes it public. */
7006 else if (toplevel_bindings_p ())
7008 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7009 && (DECL_THIS_EXTERN (decl) || ! constp));
7010 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7012 /* Not at top level, only `static' makes a static definition. */
7015 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7016 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7019 if (declspecs->specs[(int)ds_thread])
7020 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7022 if (TREE_PUBLIC (decl))
7024 /* [basic.link]: A name with no linkage (notably, the name of a class
7025 or enumeration declared in a local scope) shall not be used to
7026 declare an entity with linkage.
7028 Only check this for public decls for now. */
7029 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7032 if (TYPE_ANONYMOUS_P (t))
7034 if (DECL_EXTERN_C_P (decl))
7035 /* Allow this; it's pretty common in C. */
7039 /* DRs 132, 319 and 389 seem to indicate types with
7040 no linkage can only be used to declare extern "C"
7041 entities. Since it's not always an error in the
7042 ISO C++ 90 Standard, we only issue a warning. */
7043 warning (0, "non-local variable %q#D uses anonymous type",
7045 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7046 warning (0, "%q+#D does not refer to the unqualified "
7047 "type, so it is not used for linkage",
7052 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7056 DECL_INTERFACE_KNOWN (decl) = 1;
7061 /* Create and return a canonical pointer to member function type, for
7062 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7065 build_ptrmemfunc_type (tree type)
7069 tree unqualified_variant = NULL_TREE;
7071 if (type == error_mark_node)
7074 /* If a canonical type already exists for this type, use it. We use
7075 this method instead of type_hash_canon, because it only does a
7076 simple equality check on the list of field members. */
7078 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7081 /* Make sure that we always have the unqualified pointer-to-member
7083 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7085 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7087 t = make_class_type (RECORD_TYPE);
7088 xref_basetypes (t, NULL_TREE);
7090 /* Let the front end know this is a pointer to member function... */
7091 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7092 /* ... and not really a class type. */
7093 SET_CLASS_TYPE_P (t, 0);
7095 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7098 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7100 TREE_CHAIN (field) = fields;
7103 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7105 /* Zap out the name so that the back end will give us the debugging
7106 information for this anonymous RECORD_TYPE. */
7107 TYPE_NAME (t) = NULL_TREE;
7109 /* If this is not the unqualified form of this pointer-to-member
7110 type, set the TYPE_MAIN_VARIANT for this type to be the
7111 unqualified type. Since they are actually RECORD_TYPEs that are
7112 not variants of each other, we must do this manually. */
7113 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7115 t = build_qualified_type (t, cp_type_quals (type));
7116 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7117 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7118 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7119 TREE_TYPE (TYPE_BINFO (t)) = t;
7122 /* Cache this pointer-to-member type so that we can find it again
7124 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7126 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7127 SET_TYPE_STRUCTURAL_EQUALITY (t);
7128 else if (TYPE_CANONICAL (type) != type)
7129 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7134 /* Create and return a pointer to data member type. */
7137 build_ptrmem_type (tree class_type, tree member_type)
7139 if (TREE_CODE (member_type) == METHOD_TYPE)
7143 arg_types = TYPE_ARG_TYPES (member_type);
7144 class_type = (cp_build_qualified_type
7146 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7148 = build_method_type_directly (class_type,
7149 TREE_TYPE (member_type),
7150 TREE_CHAIN (arg_types));
7151 return build_ptrmemfunc_type (build_pointer_type (member_type));
7155 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7156 return build_offset_type (class_type, member_type);
7160 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7161 Check to see that the definition is valid. Issue appropriate error
7162 messages. Return 1 if the definition is particularly bad, or 0
7166 check_static_variable_definition (tree decl, tree type)
7168 /* Motion 10 at San Diego: If a static const integral data member is
7169 initialized with an integral constant expression, the initializer
7170 may appear either in the declaration (within the class), or in
7171 the definition, but not both. If it appears in the class, the
7172 member is a member constant. The file-scope definition is always
7174 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7176 error ("invalid in-class initialization of static data member "
7177 "of non-integral type %qT",
7179 /* If we just return the declaration, crashes will sometimes
7180 occur. We therefore return void_type_node, as if this were a
7181 friend declaration, to cause callers to completely ignore
7182 this declaration. */
7185 else if (!CP_TYPE_CONST_P (type))
7186 error ("ISO C++ forbids in-class initialization of non-const "
7187 "static member %qD",
7189 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7190 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7191 "%qD of non-integral type %qT", decl, type);
7196 /* Given the SIZE (i.e., number of elements) in an array, compute an
7197 appropriate index type for the array. If non-NULL, NAME is the
7198 name of the thing being declared. */
7201 compute_array_index_type (tree name, tree size)
7205 tree abi_1_itype = NULL_TREE;
7207 if (error_operand_p (size))
7208 return error_mark_node;
7210 type = TREE_TYPE (size);
7211 /* The array bound must be an integer type. */
7212 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7215 error ("size of array %qD has non-integral type %qT", name, type);
7217 error ("size of array has non-integral type %qT", type);
7218 size = integer_one_node;
7219 type = TREE_TYPE (size);
7222 /* We can only call value_dependent_expression_p on integral constant
7223 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7224 set if this isn't one. */
7225 if (processing_template_decl
7226 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7228 /* We cannot do any checking for a SIZE that isn't known to be
7229 constant. Just build the index type and mark that it requires
7230 structural equality checks. */
7231 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7232 size, integer_one_node));
7233 if (!TREE_SIDE_EFFECTS (size))
7235 TYPE_DEPENDENT_P (itype) = 1;
7236 TYPE_DEPENDENT_P_VALID (itype) = 1;
7238 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7242 if (!abi_version_at_least (2) && processing_template_decl)
7243 /* For abi-1, we handled all instances in templates the same way,
7244 even when they were non-dependent. This affects the manglings
7245 produced. So, we do the normal checking for non-dependent
7246 sizes, but at the end we'll return the same type that abi-1
7247 would have, but with TYPE_CANONICAL set to the "right"
7248 value that the current ABI would provide. */
7249 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7250 size, integer_one_node));
7252 /* The size might be the result of a cast. */
7253 STRIP_TYPE_NOPS (size);
7255 /* It might be a const variable or enumeration constant. */
7256 size = integral_constant_value (size);
7258 /* Normally, the array-bound will be a constant. */
7259 if (TREE_CODE (size) == INTEGER_CST)
7261 /* Check to see if the array bound overflowed. Make that an
7262 error, no matter how generous we're being. */
7263 constant_expression_error (size);
7265 /* An array must have a positive number of elements. */
7266 if (INT_CST_LT (size, integer_zero_node))
7269 error ("size of array %qD is negative", name);
7271 error ("size of array is negative");
7272 size = integer_one_node;
7274 /* As an extension we allow zero-sized arrays. We always allow
7275 them in system headers because glibc uses them. */
7276 else if (integer_zerop (size) && !in_system_header)
7279 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7281 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7284 else if (TREE_CONSTANT (size))
7286 /* `(int) &fn' is not a valid array bound. */
7288 error ("size of array %qD is not an integral constant-expression",
7291 error ("size of array is not an integral constant-expression");
7292 size = integer_one_node;
7294 else if (pedantic && warn_vla != 0)
7297 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7299 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7301 else if (warn_vla > 0)
7305 "variable length array %qD is used", name);
7308 "variable length array is used");
7311 if (processing_template_decl && !TREE_CONSTANT (size))
7312 /* A variable sized array. */
7313 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7316 HOST_WIDE_INT saved_processing_template_decl;
7318 /* Compute the index of the largest element in the array. It is
7319 one less than the number of elements in the array. We save
7320 and restore PROCESSING_TEMPLATE_DECL so that computations in
7321 cp_build_binary_op will be appropriately folded. */
7322 saved_processing_template_decl = processing_template_decl;
7323 processing_template_decl = 0;
7324 itype = cp_build_binary_op (input_location,
7326 cp_convert (ssizetype, size),
7327 cp_convert (ssizetype, integer_one_node),
7328 tf_warning_or_error);
7329 itype = fold (itype);
7330 processing_template_decl = saved_processing_template_decl;
7332 if (!TREE_CONSTANT (itype))
7333 /* A variable sized array. */
7334 itype = variable_size (itype);
7335 /* Make sure that there was no overflow when creating to a signed
7336 index type. (For example, on a 32-bit machine, an array with
7337 size 2^32 - 1 is too big.) */
7338 else if (TREE_CODE (itype) == INTEGER_CST
7339 && TREE_OVERFLOW (itype))
7341 error ("overflow in array dimension");
7342 TREE_OVERFLOW (itype) = 0;
7346 /* Create and return the appropriate index type. */
7349 tree t = build_index_type (itype);
7350 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7354 return build_index_type (itype);
7357 /* Returns the scope (if any) in which the entity declared by
7358 DECLARATOR will be located. If the entity was declared with an
7359 unqualified name, NULL_TREE is returned. */
7362 get_scope_of_declarator (const cp_declarator *declarator)
7364 while (declarator && declarator->kind != cdk_id)
7365 declarator = declarator->declarator;
7367 /* If the declarator-id is a SCOPE_REF, the scope in which the
7368 declaration occurs is the first operand. */
7370 && declarator->u.id.qualifying_scope)
7371 return declarator->u.id.qualifying_scope;
7373 /* Otherwise, the declarator is not a qualified name; the entity will
7374 be declared in the current scope. */
7378 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7379 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7383 create_array_type_for_decl (tree name, tree type, tree size)
7385 tree itype = NULL_TREE;
7386 const char* error_msg;
7388 /* If things have already gone awry, bail now. */
7389 if (type == error_mark_node || size == error_mark_node)
7390 return error_mark_node;
7392 /* Assume that everything will go OK. */
7395 /* There are some types which cannot be array elements. */
7396 switch (TREE_CODE (type))
7399 error_msg = "array of void";
7403 error_msg = "array of functions";
7406 case REFERENCE_TYPE:
7407 error_msg = "array of references";
7411 error_msg = "array of function members";
7418 /* If something went wrong, issue an error-message and return. */
7422 error ("declaration of %qD as %s", name, error_msg);
7424 error ("creating %s", error_msg);
7426 return error_mark_node;
7431 The constant expressions that specify the bounds of the arrays
7432 can be omitted only for the first member of the sequence. */
7433 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7436 error ("declaration of %qD as multidimensional array must "
7437 "have bounds for all dimensions except the first",
7440 error ("multidimensional array must have bounds for all "
7441 "dimensions except the first");
7443 return error_mark_node;
7446 /* Figure out the index type for the array. */
7448 itype = compute_array_index_type (name, size);
7451 T is called the array element type; this type shall not be [...] an
7452 abstract class type. */
7453 abstract_virtuals_error (name, type);
7455 return build_cplus_array_type (type, itype);
7458 /* Check that it's OK to declare a function with the indicated TYPE.
7459 SFK indicates the kind of special function (if any) that this
7460 function is. OPTYPE is the type given in a conversion operator
7461 declaration, or the class type for a constructor/destructor.
7462 Returns the actual return type of the function; that
7463 may be different than TYPE if an error occurs, or for certain
7464 special functions. */
7467 check_special_function_return_type (special_function_kind sfk,
7473 case sfk_constructor:
7475 error ("return type specification for constructor invalid");
7477 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7478 type = build_pointer_type (optype);
7480 type = void_type_node;
7483 case sfk_destructor:
7485 error ("return type specification for destructor invalid");
7486 /* We can't use the proper return type here because we run into
7487 problems with ambiguous bases and covariant returns.
7488 Java classes are left unchanged because (void *) isn't a valid
7489 Java type, and we don't want to change the Java ABI. */
7490 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7491 type = build_pointer_type (void_type_node);
7493 type = void_type_node;
7496 case sfk_conversion:
7498 error ("return type specified for %<operator %T%>", optype);
7509 /* A variable or data member (whose unqualified name is IDENTIFIER)
7510 has been declared with the indicated TYPE. If the TYPE is not
7511 acceptable, issue an error message and return a type to use for
7512 error-recovery purposes. */
7515 check_var_type (tree identifier, tree type)
7517 if (VOID_TYPE_P (type))
7520 error ("unnamed variable or field declared void");
7521 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7523 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7524 error ("variable or field %qE declared void", identifier);
7527 error ("variable or field declared void");
7528 type = error_mark_node;
7534 /* Given declspecs and a declarator (abstract or otherwise), determine
7535 the name and type of the object declared and construct a DECL node
7538 DECLSPECS points to the representation of declaration-specifier
7539 sequence that precedes declarator.
7541 DECL_CONTEXT says which syntactic context this declaration is in:
7542 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7543 FUNCDEF for a function definition. Like NORMAL but a few different
7544 error messages in each case. Return value may be zero meaning
7545 this definition is too screwy to try to parse.
7546 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7547 handle member functions (which have FIELD context).
7548 Return value may be zero meaning this definition is too screwy to
7550 PARM for a parameter declaration (either within a function prototype
7551 or before a function body). Make a PARM_DECL, or return void_type_node.
7552 CATCHPARM for a parameter declaration before a catch clause.
7553 TYPENAME if for a typename (in a cast or sizeof).
7554 Don't make a DECL node; just return the ..._TYPE node.
7555 FIELD for a struct or union field; make a FIELD_DECL.
7556 BITFIELD for a field with specified width.
7557 INITIALIZED is as for start_decl.
7559 ATTRLIST is a pointer to the list of attributes, which may be NULL
7560 if there are none; *ATTRLIST may be modified if attributes from inside
7561 the declarator should be applied to the declaration.
7563 When this function is called, scoping variables (such as
7564 CURRENT_CLASS_TYPE) should reflect the scope in which the
7565 declaration occurs, not the scope in which the new declaration will
7566 be placed. For example, on:
7570 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7573 Returns a DECL (if a declarator is present), a TYPE (if there is no
7574 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7578 grokdeclarator (const cp_declarator *declarator,
7579 const cp_decl_specifier_seq *declspecs,
7580 enum decl_context decl_context,
7584 tree type = NULL_TREE;
7586 int virtualp, explicitp, friendp, inlinep, staticp;
7587 int explicit_int = 0;
7588 int explicit_char = 0;
7589 int defaulted_int = 0;
7590 tree dependent_name = NULL_TREE;
7592 tree typedef_decl = NULL_TREE;
7593 const char *name = NULL;
7594 tree typedef_type = NULL_TREE;
7595 /* True if this declarator is a function definition. */
7596 bool funcdef_flag = false;
7597 cp_declarator_kind innermost_code = cdk_error;
7600 /* See the code below that used this. */
7601 tree decl_attr = NULL_TREE;
7604 /* Keep track of what sort of function is being processed
7605 so that we can warn about default return values, or explicit
7606 return values which do not match prescribed defaults. */
7607 special_function_kind sfk = sfk_none;
7609 tree dname = NULL_TREE;
7610 tree ctor_return_type = NULL_TREE;
7611 enum overload_flags flags = NO_SPECIAL;
7612 /* cv-qualifiers that apply to the declarator, for a declaration of
7613 a member function. */
7614 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7615 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7617 tree raises = NULL_TREE;
7618 int template_count = 0;
7619 tree returned_attrs = NULL_TREE;
7620 tree parms = NULL_TREE;
7621 const cp_declarator *id_declarator;
7622 /* The unqualified name of the declarator; either an
7623 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7624 tree unqualified_id;
7625 /* The class type, if any, in which this entity is located,
7626 or NULL_TREE if none. Note that this value may be different from
7627 the current class type; for example if an attempt is made to declare
7628 "A::f" inside "B", this value will be "A". */
7629 tree ctype = current_class_type;
7630 /* The NAMESPACE_DECL for the namespace in which this entity is
7631 located. If an unqualified name is used to declare the entity,
7632 this value will be NULL_TREE, even if the entity is located at
7634 tree in_namespace = NULL_TREE;
7635 cp_storage_class storage_class;
7636 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7637 bool type_was_error_mark_node = false;
7638 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7639 bool template_type_arg = false;
7642 signed_p = declspecs->specs[(int)ds_signed];
7643 unsigned_p = declspecs->specs[(int)ds_unsigned];
7644 short_p = declspecs->specs[(int)ds_short];
7645 long_p = declspecs->specs[(int)ds_long];
7646 longlong = declspecs->specs[(int)ds_long] >= 2;
7647 thread_p = declspecs->specs[(int)ds_thread];
7649 if (decl_context == FUNCDEF)
7650 funcdef_flag = true, decl_context = NORMAL;
7651 else if (decl_context == MEMFUNCDEF)
7652 funcdef_flag = true, decl_context = FIELD;
7653 else if (decl_context == BITFIELD)
7654 bitfield = 1, decl_context = FIELD;
7655 else if (decl_context == TEMPLATE_TYPE_ARG)
7656 template_type_arg = true, decl_context = TYPENAME;
7658 if (initialized > 1)
7659 funcdef_flag = true;
7661 /* Look inside a declarator for the name being declared
7662 and get it as a string, for an error message. */
7663 for (id_declarator = declarator;
7665 id_declarator = id_declarator->declarator)
7667 if (id_declarator->kind != cdk_id)
7668 innermost_code = id_declarator->kind;
7670 switch (id_declarator->kind)
7673 if (id_declarator->declarator
7674 && id_declarator->declarator->kind == cdk_id)
7676 sfk = id_declarator->declarator->u.id.sfk;
7677 if (sfk == sfk_destructor)
7684 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7685 tree decl = id_declarator->u.id.unqualified_name;
7688 if (qualifying_scope)
7690 if (at_function_scope_p ())
7694 A declarator-id shall not be qualified except
7697 None of the cases are permitted in block
7699 if (qualifying_scope == global_namespace)
7700 error ("invalid use of qualified-name %<::%D%>",
7702 else if (TYPE_P (qualifying_scope))
7703 error ("invalid use of qualified-name %<%T::%D%>",
7704 qualifying_scope, decl);
7706 error ("invalid use of qualified-name %<%D::%D%>",
7707 qualifying_scope, decl);
7708 return error_mark_node;
7710 else if (TYPE_P (qualifying_scope))
7712 ctype = qualifying_scope;
7713 if (innermost_code != cdk_function
7714 && current_class_type
7715 && !UNIQUELY_DERIVED_FROM_P (ctype,
7716 current_class_type))
7718 error ("type %qT is not derived from type %qT",
7719 ctype, current_class_type);
7720 return error_mark_node;
7723 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7724 in_namespace = qualifying_scope;
7726 switch (TREE_CODE (decl))
7732 if (innermost_code != cdk_function)
7734 error ("declaration of %qD as non-function", decl);
7735 return error_mark_node;
7737 else if (!qualifying_scope
7738 && !(current_class_type && at_class_scope_p ()))
7740 error ("declaration of %qD as non-member", decl);
7741 return error_mark_node;
7744 type = TREE_OPERAND (decl, 0);
7746 type = constructor_name (type);
7747 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7752 case TEMPLATE_ID_EXPR:
7754 tree fns = TREE_OPERAND (decl, 0);
7757 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7759 gcc_assert (is_overloaded_fn (dname));
7760 dname = DECL_NAME (get_first_fn (dname));
7765 case IDENTIFIER_NODE:
7766 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7769 if (C_IS_RESERVED_WORD (dname))
7771 error ("declarator-id missing; using reserved word %qD",
7773 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7775 else if (!IDENTIFIER_TYPENAME_P (dname))
7776 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7779 gcc_assert (flags == NO_SPECIAL);
7780 flags = TYPENAME_FLAG;
7781 ctor_return_type = TREE_TYPE (dname);
7782 sfk = sfk_conversion;
7783 if (is_typename_at_global_scope (dname))
7784 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7786 name = "<invalid operator>";
7803 return error_mark_node;
7808 if (id_declarator->kind == cdk_id)
7814 The declarator in a function-definition shall have the form
7815 D1 ( parameter-declaration-clause) ... */
7816 if (funcdef_flag && innermost_code != cdk_function)
7818 error ("function definition does not declare parameters");
7819 return error_mark_node;
7822 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7823 && innermost_code != cdk_function
7824 && ! (ctype && !declspecs->any_specifiers_p))
7826 error ("declaration of %qD as non-function", dname);
7827 return error_mark_node;
7830 /* Anything declared one level down from the top level
7831 must be one of the parameters of a function
7832 (because the body is at least two levels down). */
7834 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7835 by not allowing C++ class definitions to specify their parameters
7836 with xdecls (must be spec.d in the parmlist).
7838 Since we now wait to push a class scope until we are sure that
7839 we are in a legitimate method context, we must set oldcname
7840 explicitly (since current_class_name is not yet alive).
7842 We also want to avoid calling this a PARM if it is in a namespace. */
7844 if (decl_context == NORMAL && !toplevel_bindings_p ())
7846 struct cp_binding_level *b = current_binding_level;
7847 current_binding_level = b->level_chain;
7848 if (current_binding_level != 0 && toplevel_bindings_p ())
7849 decl_context = PARM;
7850 current_binding_level = b;
7854 name = decl_context == PARM ? "parameter" : "type name";
7856 /* If there were multiple types specified in the decl-specifier-seq,
7857 issue an error message. */
7858 if (declspecs->multiple_types_p)
7860 error ("two or more data types in declaration of %qs", name);
7861 return error_mark_node;
7864 if (declspecs->conflicting_specifiers_p)
7866 error ("conflicting specifiers in declaration of %qs", name);
7867 return error_mark_node;
7870 /* Extract the basic type from the decl-specifier-seq. */
7871 type = declspecs->type;
7872 if (type == error_mark_node)
7875 type_was_error_mark_node = true;
7877 /* If the entire declaration is itself tagged as deprecated then
7878 suppress reports of deprecated items. */
7879 if (type && TREE_DEPRECATED (type)
7880 && deprecated_state != DEPRECATED_SUPPRESS)
7881 warn_deprecated_use (type, NULL_TREE);
7882 if (type && TREE_CODE (type) == TYPE_DECL)
7884 typedef_decl = type;
7885 type = TREE_TYPE (typedef_decl);
7886 if (TREE_DEPRECATED (type)
7887 && DECL_ARTIFICIAL (typedef_decl)
7888 && deprecated_state != DEPRECATED_SUPPRESS)
7889 warn_deprecated_use (type, NULL_TREE);
7891 /* No type at all: default to `int', and set DEFAULTED_INT
7892 because it was not a user-defined typedef. */
7893 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7895 /* These imply 'int'. */
7896 type = integer_type_node;
7900 explicit_int = declspecs->explicit_int_p;
7901 explicit_char = declspecs->explicit_char_p;
7904 /* See the code below that used this. */
7906 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7908 typedef_type = type;
7911 if (sfk != sfk_conversion)
7912 ctor_return_type = ctype;
7914 if (sfk != sfk_none)
7915 type = check_special_function_return_type (sfk, type,
7917 else if (type == NULL_TREE)
7923 /* We handle `main' specially here, because 'main () { }' is so
7924 common. With no options, it is allowed. With -Wreturn-type,
7925 it is a warning. It is only an error with -pedantic-errors. */
7926 is_main = (funcdef_flag
7927 && dname && MAIN_NAME_P (dname)
7928 && ctype == NULL_TREE
7929 && in_namespace == NULL_TREE
7930 && current_namespace == global_namespace);
7932 if (type_was_error_mark_node)
7933 /* We've already issued an error, don't complain more. */;
7934 else if (in_system_header || flag_ms_extensions)
7935 /* Allow it, sigh. */;
7937 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7939 pedwarn (input_location, OPT_pedantic,
7940 "ISO C++ forbids declaration of %qs with no type", name);
7942 warning (OPT_Wreturn_type,
7943 "ISO C++ forbids declaration of %qs with no type", name);
7945 type = integer_type_node;
7950 /* Now process the modifiers that were specified
7951 and check for invalid combinations. */
7953 /* Long double is a special combination. */
7954 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7957 type = build_qualified_type (long_double_type_node,
7958 cp_type_quals (type));
7961 /* Check all other uses of type modifiers. */
7963 if (unsigned_p || signed_p || long_p || short_p)
7967 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7968 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7969 else if (signed_p && unsigned_p)
7970 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7971 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7972 error ("%<long long%> invalid for %qs", name);
7973 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7974 error ("%<long%> invalid for %qs", name);
7975 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7976 error ("%<short%> invalid for %qs", name);
7977 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7978 error ("%<long%> or %<short%> invalid for %qs", name);
7979 else if ((long_p || short_p) && explicit_char)
7980 error ("%<long%> or %<short%> specified with char for %qs", name);
7981 else if (long_p && short_p)
7982 error ("%<long%> and %<short%> specified together for %qs", name);
7983 else if (type == char16_type_node || type == char32_type_node)
7985 if (signed_p || unsigned_p)
7986 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7987 else if (short_p || long_p)
7988 error ("%<short%> or %<long%> invalid for %qs", name);
7993 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7995 pedwarn (input_location, OPT_pedantic,
7996 "long, short, signed or unsigned used invalidly for %qs",
7998 if (flag_pedantic_errors)
8003 /* Discard the type modifiers if they are invalid. */
8014 /* Decide whether an integer type is signed or not.
8015 Optionally treat bitfields as signed by default. */
8019 It is implementation-defined whether a plain (neither
8020 explicitly signed or unsigned) char, short, int, or long
8021 bit-field is signed or unsigned.
8023 Naturally, we extend this to long long as well. Note that
8024 this does not include wchar_t. */
8025 || (bitfield && !flag_signed_bitfields
8027 /* A typedef for plain `int' without `signed' can be
8028 controlled just like plain `int', but a typedef for
8029 `signed int' cannot be so controlled. */
8031 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8032 && TREE_CODE (type) == INTEGER_TYPE
8033 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8036 type = long_long_unsigned_type_node;
8038 type = long_unsigned_type_node;
8040 type = short_unsigned_type_node;
8041 else if (type == char_type_node)
8042 type = unsigned_char_type_node;
8043 else if (typedef_decl)
8044 type = unsigned_type_for (type);
8046 type = unsigned_type_node;
8048 else if (signed_p && type == char_type_node)
8049 type = signed_char_type_node;
8051 type = long_long_integer_type_node;
8053 type = long_integer_type_node;
8055 type = short_integer_type_node;
8057 if (declspecs->specs[(int)ds_complex])
8059 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8060 error ("complex invalid for %qs", name);
8061 /* If we just have "complex", it is equivalent to
8062 "complex double", but if any modifiers at all are specified it is
8063 the complex form of TYPE. E.g, "complex short" is
8064 "complex short int". */
8066 else if (defaulted_int && ! longlong
8067 && ! (long_p || short_p || signed_p || unsigned_p))
8068 type = complex_double_type_node;
8069 else if (type == integer_type_node)
8070 type = complex_integer_type_node;
8071 else if (type == float_type_node)
8072 type = complex_float_type_node;
8073 else if (type == double_type_node)
8074 type = complex_double_type_node;
8075 else if (type == long_double_type_node)
8076 type = complex_long_double_type_node;
8078 type = build_complex_type (type);
8081 type_quals = TYPE_UNQUALIFIED;
8082 if (declspecs->specs[(int)ds_const])
8083 type_quals |= TYPE_QUAL_CONST;
8084 if (declspecs->specs[(int)ds_volatile])
8085 type_quals |= TYPE_QUAL_VOLATILE;
8086 if (declspecs->specs[(int)ds_restrict])
8087 type_quals |= TYPE_QUAL_RESTRICT;
8088 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8089 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8092 if (TREE_CODE (type) == FUNCTION_TYPE
8093 && type_quals != TYPE_UNQUALIFIED)
8095 /* This was an error in C++98 (cv-qualifiers cannot be added to
8096 a function type), but DR 295 makes the code well-formed by
8097 dropping the extra qualifiers. */
8100 tree bad_type = build_qualified_type (type, type_quals);
8101 pedwarn (input_location, OPT_pedantic,
8102 "ignoring %qV qualifiers added to function type %qT",
8105 type_quals = TYPE_UNQUALIFIED;
8107 type_quals |= cp_type_quals (type);
8108 type = cp_build_qualified_type_real
8109 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8110 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8111 /* We might have ignored or rejected some of the qualifiers. */
8112 type_quals = cp_type_quals (type);
8115 inlinep = !! declspecs->specs[(int)ds_inline];
8116 virtualp = !! declspecs->specs[(int)ds_virtual];
8117 explicitp = !! declspecs->specs[(int)ds_explicit];
8119 storage_class = declspecs->storage_class;
8120 if (storage_class == sc_static)
8121 staticp = 1 + (decl_context == FIELD);
8123 if (virtualp && staticp == 2)
8125 error ("member %qD cannot be declared both virtual and static", dname);
8126 storage_class = sc_none;
8129 friendp = !! declspecs->specs[(int)ds_friend];
8131 if (dependent_name && !friendp)
8133 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8134 return error_mark_node;
8137 /* Issue errors about use of storage classes for parameters. */
8138 if (decl_context == PARM)
8140 if (declspecs->specs[(int)ds_typedef])
8142 error ("typedef declaration invalid in parameter declaration");
8143 return error_mark_node;
8145 else if (storage_class == sc_static
8146 || storage_class == sc_extern
8148 error ("storage class specifiers invalid in parameter declarations");
8150 if (type_uses_auto (type))
8152 error ("parameter declared %<auto%>");
8153 type = error_mark_node;
8157 /* Give error if `virtual' is used outside of class declaration. */
8159 && (current_class_name == NULL_TREE || decl_context != FIELD))
8161 error ("%<virtual%> outside class declaration");
8165 /* Static anonymous unions are dealt with here. */
8166 if (staticp && decl_context == TYPENAME
8168 && ANON_AGGR_TYPE_P (declspecs->type))
8169 decl_context = FIELD;
8171 /* Warn about storage classes that are invalid for certain
8172 kinds of declarations (parameters, typenames, etc.). */
8175 && storage_class != sc_extern
8176 && storage_class != sc_static)
8177 || declspecs->specs[(int)ds_typedef]))
8179 error ("multiple storage classes in declaration of %qs", name);
8182 if (decl_context != NORMAL
8183 && ((storage_class != sc_none
8184 && storage_class != sc_mutable)
8187 if ((decl_context == PARM || decl_context == CATCHPARM)
8188 && (storage_class == sc_register
8189 || storage_class == sc_auto))
8191 else if (declspecs->specs[(int)ds_typedef])
8193 else if (decl_context == FIELD
8194 /* C++ allows static class elements. */
8195 && storage_class == sc_static)
8196 /* C++ also allows inlines and signed and unsigned elements,
8197 but in those cases we don't come in here. */
8201 if (decl_context == FIELD)
8202 error ("storage class specified for %qs", name);
8205 if (decl_context == PARM || decl_context == CATCHPARM)
8206 error ("storage class specified for parameter %qs", name);
8208 error ("storage class specified for typename");
8210 if (storage_class == sc_register
8211 || storage_class == sc_auto
8212 || storage_class == sc_extern
8214 storage_class = sc_none;
8217 else if (storage_class == sc_extern && funcdef_flag
8218 && ! toplevel_bindings_p ())
8219 error ("nested function %qs declared %<extern%>", name);
8220 else if (toplevel_bindings_p ())
8222 if (storage_class == sc_auto)
8223 error ("top-level declaration of %qs specifies %<auto%>", name);
8226 && storage_class != sc_extern
8227 && storage_class != sc_static)
8229 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8234 if (storage_class && friendp)
8236 error ("storage class specifiers invalid in friend function declarations");
8237 storage_class = sc_none;
8242 unqualified_id = NULL_TREE;
8245 unqualified_id = id_declarator->u.id.unqualified_name;
8246 switch (TREE_CODE (unqualified_id))
8249 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8250 if (TYPE_P (unqualified_id))
8251 unqualified_id = constructor_name (unqualified_id);
8254 case IDENTIFIER_NODE:
8255 case TEMPLATE_ID_EXPR:
8263 /* Determine the type of the entity declared by recurring on the
8265 for (; declarator; declarator = declarator->declarator)
8267 const cp_declarator *inner_declarator;
8270 if (type == error_mark_node)
8271 return error_mark_node;
8273 attrs = declarator->attributes;
8279 if (declarator == NULL || declarator->kind == cdk_id)
8280 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8281 if (declarator->kind == cdk_function)
8282 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8283 if (declarator->kind == cdk_array)
8284 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8285 returned_attrs = decl_attributes (&type,
8286 chainon (returned_attrs, attrs),
8290 if (declarator->kind == cdk_id)
8293 inner_declarator = declarator->declarator;
8295 switch (declarator->kind)
8298 type = create_array_type_for_decl (dname, type,
8299 declarator->u.array.bounds);
8307 /* Declaring a function type.
8308 Make sure we have a valid type for the function to return. */
8310 if (type_quals != TYPE_UNQUALIFIED)
8312 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8313 warning (OPT_Wignored_qualifiers,
8314 "type qualifiers ignored on function return type");
8315 /* We now know that the TYPE_QUALS don't apply to the
8316 decl, but to its return type. */
8317 type_quals = TYPE_UNQUALIFIED;
8319 errmsg = targetm.invalid_return_type (type);
8323 type = integer_type_node;
8326 /* Error about some types functions can't return. */
8328 if (TREE_CODE (type) == FUNCTION_TYPE)
8330 error ("%qs declared as function returning a function", name);
8331 return error_mark_node;
8333 if (TREE_CODE (type) == ARRAY_TYPE)
8335 error ("%qs declared as function returning an array", name);
8336 return error_mark_node;
8339 /* Pick up type qualifiers which should be applied to `this'. */
8340 memfn_quals = declarator->u.function.qualifiers;
8342 /* Pick up the exception specifications. */
8343 raises = declarator->u.function.exception_specification;
8345 /* Say it's a definition only for the CALL_EXPR
8346 closest to the identifier. */
8347 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8349 /* Handle a late-specified return type. */
8352 if (type_uses_auto (type))
8354 if (!declarator->u.function.late_return_type)
8356 error ("%qs function uses %<auto%> type specifier without"
8357 " late return type", name);
8358 return error_mark_node;
8360 else if (!is_auto (type))
8362 error ("%qs function with late return type has"
8363 " %qT as its type rather than plain %<auto%>",
8365 return error_mark_node;
8368 else if (declarator->u.function.late_return_type)
8370 error ("%qs function with late return type not declared"
8371 " with %<auto%> type specifier", name);
8372 return error_mark_node;
8375 type = splice_late_return_type
8376 (type, declarator->u.function.late_return_type);
8377 if (type == error_mark_node)
8378 return error_mark_node;
8380 if (ctype == NULL_TREE
8381 && decl_context == FIELD
8383 && (friendp == 0 || dname == current_class_name))
8384 ctype = current_class_type;
8386 if (ctype && (sfk == sfk_constructor
8387 || sfk == sfk_destructor))
8389 /* We are within a class's scope. If our declarator name
8390 is the same as the class name, and we are defining
8391 a function, then it is a constructor/destructor, and
8392 therefore returns a void type. */
8394 /* ISO C++ 12.4/2. A destructor may not be declared
8395 const or volatile. A destructor may not be
8398 ISO C++ 12.1. A constructor may not be declared
8399 const or volatile. A constructor may not be
8400 virtual. A constructor may not be static. */
8402 error ((flags == DTOR_FLAG)
8403 ? "destructor cannot be static member function"
8404 : "constructor cannot be static member function");
8407 error ((flags == DTOR_FLAG)
8408 ? "destructors may not be cv-qualified"
8409 : "constructors may not be cv-qualified");
8410 memfn_quals = TYPE_UNQUALIFIED;
8413 if (decl_context == FIELD
8414 && !member_function_or_else (ctype,
8417 return error_mark_node;
8419 if (flags != DTOR_FLAG)
8421 /* It's a constructor. */
8426 permerror (input_location, "constructors cannot be declared virtual");
8429 if (decl_context == FIELD
8430 && sfk != sfk_constructor)
8431 return error_mark_node;
8433 if (decl_context == FIELD)
8439 error ("can't initialize friend function %qs", name);
8442 /* Cannot be both friend and virtual. */
8443 error ("virtual functions cannot be friends");
8446 if (decl_context == NORMAL)
8447 error ("friend declaration not in class definition");
8448 if (current_function_decl && funcdef_flag)
8449 error ("can't define friend function %qs in a local "
8453 else if (ctype && sfk == sfk_conversion)
8457 maybe_warn_cpp0x ("explicit conversion operators");
8462 arg_types = grokparms (declarator->u.function.parameters,
8465 if (inner_declarator
8466 && inner_declarator->kind == cdk_id
8467 && inner_declarator->u.id.sfk == sfk_destructor
8468 && arg_types != void_list_node)
8470 error ("destructors may not have parameters");
8471 arg_types = void_list_node;
8475 type = build_function_type (type, arg_types);
8482 /* Filter out pointers-to-references and references-to-references.
8483 We can get these if a TYPE_DECL is used. */
8485 if (TREE_CODE (type) == REFERENCE_TYPE)
8487 if (declarator->kind != cdk_reference)
8489 error ("cannot declare pointer to %q#T", type);
8490 type = TREE_TYPE (type);
8493 /* In C++0x, we allow reference to reference declarations
8494 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8495 and template type arguments [14.3.1/4 temp.arg.type]. The
8496 check for direct reference to reference declarations, which
8497 are still forbidden, occurs below. Reasoning behind the change
8498 can be found in DR106, DR540, and the rvalue reference
8500 else if (cxx_dialect == cxx98)
8502 error ("cannot declare reference to %q#T", type);
8503 type = TREE_TYPE (type);
8506 else if (VOID_TYPE_P (type))
8508 if (declarator->kind == cdk_reference)
8509 error ("cannot declare reference to %q#T", type);
8510 else if (declarator->kind == cdk_ptrmem)
8511 error ("cannot declare pointer to %q#T member", type);
8514 /* We now know that the TYPE_QUALS don't apply to the decl,
8515 but to the target of the pointer. */
8516 type_quals = TYPE_UNQUALIFIED;
8518 if (declarator->kind == cdk_ptrmem
8519 && (TREE_CODE (type) == FUNCTION_TYPE
8520 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8522 memfn_quals |= cp_type_quals (type);
8523 type = build_memfn_type (type,
8524 declarator->u.pointer.class_type,
8526 memfn_quals = TYPE_UNQUALIFIED;
8529 if (TREE_CODE (type) == FUNCTION_TYPE
8530 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8531 error ("cannot declare %s to qualified function type %qT",
8532 declarator->kind == cdk_reference ? "reference" : "pointer",
8535 if (declarator->kind == cdk_reference)
8537 /* In C++0x, the type we are creating a reference to might be
8538 a typedef which is itself a reference type. In that case,
8539 we follow the reference collapsing rules in
8540 [7.1.3/8 dcl.typedef] to create the final reference type:
8542 "If a typedef TD names a type that is a reference to a type
8543 T, an attempt to create the type 'lvalue reference to cv TD'
8544 creates the type 'lvalue reference to T,' while an attempt
8545 to create the type "rvalue reference to cv TD' creates the
8548 if (!VOID_TYPE_P (type))
8549 type = cp_build_reference_type
8550 ((TREE_CODE (type) == REFERENCE_TYPE
8551 ? TREE_TYPE (type) : type),
8552 (declarator->u.reference.rvalue_ref
8553 && (TREE_CODE(type) != REFERENCE_TYPE
8554 || TYPE_REF_IS_RVALUE (type))));
8556 /* In C++0x, we need this check for direct reference to
8557 reference declarations, which are forbidden by
8558 [8.3.2/5 dcl.ref]. Reference to reference declarations
8559 are only allowed indirectly through typedefs and template
8560 type arguments. Example:
8562 void foo(int & &); // invalid ref-to-ref decl
8564 typedef int & int_ref;
8565 void foo(int_ref &); // valid ref-to-ref decl
8567 if (inner_declarator && inner_declarator->kind == cdk_reference)
8568 error ("cannot declare reference to %q#T, which is not "
8569 "a typedef or a template type argument", type);
8571 else if (TREE_CODE (type) == METHOD_TYPE)
8572 type = build_ptrmemfunc_type (build_pointer_type (type));
8573 else if (declarator->kind == cdk_ptrmem)
8575 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8577 if (declarator->u.pointer.class_type == error_mark_node)
8578 /* We will already have complained. */
8579 type = error_mark_node;
8581 type = build_ptrmem_type (declarator->u.pointer.class_type,
8585 type = build_pointer_type (type);
8587 /* Process a list of type modifier keywords (such as
8588 const or volatile) that were given inside the `*' or `&'. */
8590 if (declarator->u.pointer.qualifiers)
8593 = cp_build_qualified_type (type,
8594 declarator->u.pointer.qualifiers);
8595 type_quals = cp_type_quals (type);
8608 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8609 && TREE_CODE (type) != FUNCTION_TYPE
8610 && TREE_CODE (type) != METHOD_TYPE)
8612 error ("template-id %qD used as a declarator",
8614 unqualified_id = dname;
8617 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8618 qualified with a class-name, turn it into a METHOD_TYPE, unless
8619 we know that the function is static. We take advantage of this
8620 opportunity to do other processing that pertains to entities
8621 explicitly declared to be class members. Note that if DECLARATOR
8622 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8623 would not have exited the loop above. */
8625 && declarator->u.id.qualifying_scope
8626 && TYPE_P (declarator->u.id.qualifying_scope))
8630 ctype = declarator->u.id.qualifying_scope;
8631 ctype = TYPE_MAIN_VARIANT (ctype);
8633 while (t != NULL_TREE && CLASS_TYPE_P (t))
8635 /* You're supposed to have one `template <...>' for every
8636 template class, but you don't need one for a full
8637 specialization. For example:
8639 template <class T> struct S{};
8640 template <> struct S<int> { void f(); };
8641 void S<int>::f () {}
8643 is correct; there shouldn't be a `template <>' for the
8644 definition of `S<int>::f'. */
8645 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8646 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8647 /* T is an explicit (not partial) specialization. All
8648 containing classes must therefore also be explicitly
8651 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8652 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8653 template_count += 1;
8655 t = TYPE_MAIN_DECL (t);
8656 t = DECL_CONTEXT (t);
8659 if (ctype == current_class_type)
8663 permerror (input_location, "member functions are implicitly friends of their class");
8667 permerror (declarator->id_loc,
8668 "extra qualification %<%T::%> on member %qs",
8671 else if (/* If the qualifying type is already complete, then we
8672 can skip the following checks. */
8673 !COMPLETE_TYPE_P (ctype)
8674 && (/* If the function is being defined, then
8675 qualifying type must certainly be complete. */
8677 /* A friend declaration of "T::f" is OK, even if
8678 "T" is a template parameter. But, if this
8679 function is not a friend, the qualifying type
8681 || (!friendp && !CLASS_TYPE_P (ctype))
8682 /* For a declaration, the type need not be
8683 complete, if either it is dependent (since there
8684 is no meaningful definition of complete in that
8685 case) or the qualifying class is currently being
8687 || !(dependent_type_p (ctype)
8688 || currently_open_class (ctype)))
8689 /* Check that the qualifying type is complete. */
8690 && !complete_type_or_else (ctype, NULL_TREE))
8691 return error_mark_node;
8692 else if (TREE_CODE (type) == FUNCTION_TYPE)
8694 tree sname = declarator->u.id.unqualified_name;
8696 if (current_class_type
8697 && (!friendp || funcdef_flag))
8700 ? "cannot define member function %<%T::%s%> within %<%T%>"
8701 : "cannot declare member function %<%T::%s%> within %<%T%>",
8702 ctype, name, current_class_type);
8703 return error_mark_node;
8706 if (TREE_CODE (sname) == IDENTIFIER_NODE
8707 && NEW_DELETE_OPNAME_P (sname))
8708 /* Overloaded operator new and operator delete
8709 are always static functions. */
8712 type = build_memfn_type (type, ctype, memfn_quals);
8714 else if (declspecs->specs[(int)ds_typedef]
8715 && current_class_type)
8717 error ("cannot declare member %<%T::%s%> within %qT",
8718 ctype, name, current_class_type);
8719 return error_mark_node;
8723 /* Now TYPE has the actual type. */
8728 *attrlist = chainon (returned_attrs, *attrlist);
8730 attrlist = &returned_attrs;
8733 /* Handle parameter packs. */
8734 if (parameter_pack_p)
8736 if (decl_context == PARM)
8737 /* Turn the type into a pack expansion.*/
8738 type = make_pack_expansion (type);
8740 error ("non-parameter %qs cannot be a parameter pack", name);
8743 /* Did array size calculations overflow? */
8745 if (TREE_CODE (type) == ARRAY_TYPE
8746 && COMPLETE_TYPE_P (type)
8747 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8748 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8750 error ("size of array %qs is too large", name);
8751 /* If we proceed with the array type as it is, we'll eventually
8752 crash in tree_low_cst(). */
8753 type = error_mark_node;
8756 if ((decl_context == FIELD || decl_context == PARM)
8757 && !processing_template_decl
8758 && variably_modified_type_p (type, NULL_TREE))
8760 if (decl_context == FIELD)
8761 error ("data member may not have variably modified type %qT", type);
8763 error ("parameter may not have variably modified type %qT", type);
8764 type = error_mark_node;
8767 if (explicitp == 1 || (explicitp && friendp))
8769 /* [dcl.fct.spec] The explicit specifier shall only be used in
8770 declarations of constructors within a class definition. */
8771 error ("only declarations of constructors can be %<explicit%>");
8775 if (storage_class == sc_mutable)
8777 if (decl_context != FIELD || friendp)
8779 error ("non-member %qs cannot be declared %<mutable%>", name);
8780 storage_class = sc_none;
8782 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8784 error ("non-object member %qs cannot be declared %<mutable%>", name);
8785 storage_class = sc_none;
8787 else if (TREE_CODE (type) == FUNCTION_TYPE
8788 || TREE_CODE (type) == METHOD_TYPE)
8790 error ("function %qs cannot be declared %<mutable%>", name);
8791 storage_class = sc_none;
8795 error ("static %qs cannot be declared %<mutable%>", name);
8796 storage_class = sc_none;
8798 else if (type_quals & TYPE_QUAL_CONST)
8800 error ("const %qs cannot be declared %<mutable%>", name);
8801 storage_class = sc_none;
8805 /* If this is declaring a typedef name, return a TYPE_DECL. */
8806 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8810 /* Note that the grammar rejects storage classes
8811 in typenames, fields or parameters. */
8812 if (current_lang_name == lang_name_java)
8813 TYPE_FOR_JAVA (type) = 1;
8815 /* This declaration:
8817 typedef void f(int) const;
8819 declares a function type which is not a member of any
8820 particular class, but which is cv-qualified; for
8821 example "f S::*" declares a pointer to a const-qualified
8822 member function of S. We record the cv-qualification in the
8824 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8826 type = cp_build_qualified_type (type, memfn_quals);
8828 /* We have now dealt with these qualifiers. */
8829 memfn_quals = TYPE_UNQUALIFIED;
8832 if (decl_context == FIELD)
8833 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8835 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8836 if (id_declarator && declarator->u.id.qualifying_scope) {
8837 error_at (DECL_SOURCE_LOCATION (decl),
8838 "typedef name may not be a nested-name-specifier");
8839 TREE_TYPE (decl) = error_mark_node;
8842 if (decl_context != FIELD)
8844 if (!current_function_decl)
8845 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8846 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8847 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8848 (current_function_decl)))
8849 /* The TYPE_DECL is "abstract" because there will be
8850 clones of this constructor/destructor, and there will
8851 be copies of this TYPE_DECL generated in those
8853 DECL_ABSTRACT (decl) = 1;
8855 else if (constructor_name_p (unqualified_id, current_class_type))
8856 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8857 "as enclosing class",
8860 /* If the user declares "typedef struct {...} foo" then the
8861 struct will have an anonymous name. Fill that name in now.
8862 Nothing can refer to it, so nothing needs know about the name
8864 if (type != error_mark_node
8867 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8868 && TYPE_ANONYMOUS_P (type)
8869 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8873 /* Replace the anonymous name with the real name everywhere. */
8874 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8876 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8878 debug_hooks->set_name (t, decl);
8879 TYPE_NAME (t) = decl;
8883 if (TYPE_LANG_SPECIFIC (type))
8884 TYPE_WAS_ANONYMOUS (type) = 1;
8886 /* If this is a typedef within a template class, the nested
8887 type is a (non-primary) template. The name for the
8888 template needs updating as well. */
8889 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8890 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8891 = TYPE_IDENTIFIER (type);
8893 /* FIXME remangle member functions; member functions of a
8894 type with external linkage have external linkage. */
8898 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8899 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8901 bad_specifiers (decl, "type", virtualp,
8902 memfn_quals != TYPE_UNQUALIFIED,
8903 inlinep, friendp, raises != NULL_TREE);
8908 /* Detect the case of an array type of unspecified size
8909 which came, as such, direct from a typedef name.
8910 We must copy the type, so that the array's domain can be
8911 individually set by the object's initializer. */
8913 if (type && typedef_type
8914 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8915 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8916 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8918 /* Detect where we're using a typedef of function type to declare a
8919 function. PARMS will not be set, so we must create it now. */
8921 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8923 tree decls = NULL_TREE;
8926 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8928 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8930 TREE_CHAIN (decl) = decls;
8934 parms = nreverse (decls);
8936 if (decl_context != TYPENAME)
8938 /* A cv-qualifier-seq shall only be part of the function type
8939 for a non-static member function. [8.3.5/4 dcl.fct] */
8940 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8941 && (current_class_type == NULL_TREE || staticp) )
8944 ? G_("qualified function types cannot be used to "
8945 "declare static member functions")
8946 : G_("qualified function types cannot be used to "
8947 "declare free functions"));
8948 type = TYPE_MAIN_VARIANT (type);
8951 /* The qualifiers on the function type become the qualifiers on
8952 the non-static member function. */
8953 memfn_quals |= cp_type_quals (type);
8957 /* If this is a type name (such as, in a cast or sizeof),
8958 compute the type and return it now. */
8960 if (decl_context == TYPENAME)
8962 /* Note that the grammar rejects storage classes
8963 in typenames, fields or parameters. */
8964 if (type_quals != TYPE_UNQUALIFIED)
8965 type_quals = TYPE_UNQUALIFIED;
8967 /* Special case: "friend class foo" looks like a TYPENAME context. */
8970 if (type_quals != TYPE_UNQUALIFIED)
8972 error ("type qualifiers specified for friend class declaration");
8973 type_quals = TYPE_UNQUALIFIED;
8977 error ("%<inline%> specified for friend class declaration");
8983 /* Don't allow friend declaration without a class-key. */
8984 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8985 permerror (input_location, "template parameters cannot be friends");
8986 else if (TREE_CODE (type) == TYPENAME_TYPE)
8987 permerror (input_location, "friend declaration requires class-key, "
8988 "i.e. %<friend class %T::%D%>",
8989 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8991 permerror (input_location, "friend declaration requires class-key, "
8992 "i.e. %<friend %#T%>",
8996 /* Only try to do this stuff if we didn't already give up. */
8997 if (type != integer_type_node)
8999 /* A friendly class? */
9000 if (current_class_type)
9001 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9004 error ("trying to make class %qT a friend of global scope",
9007 type = void_type_node;
9010 else if (memfn_quals)
9012 if (ctype == NULL_TREE
9013 && TREE_CODE (type) == METHOD_TYPE)
9014 ctype = TYPE_METHOD_BASETYPE (type);
9017 type = build_memfn_type (type, ctype, memfn_quals);
9018 /* Core issue #547: need to allow this in template type args. */
9019 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9020 type = cp_build_qualified_type (type, memfn_quals);
9022 error ("invalid qualifiers on non-member function type");
9027 else if (unqualified_id == NULL_TREE && decl_context != PARM
9028 && decl_context != CATCHPARM
9029 && TREE_CODE (type) != UNION_TYPE
9032 error ("abstract declarator %qT used as declaration", type);
9033 return error_mark_node;
9036 /* Only functions may be declared using an operator-function-id. */
9038 && IDENTIFIER_OPNAME_P (unqualified_id)
9039 && TREE_CODE (type) != FUNCTION_TYPE
9040 && TREE_CODE (type) != METHOD_TYPE)
9042 error ("declaration of %qD as non-function", unqualified_id);
9043 return error_mark_node;
9046 /* We don't check parameter types here because we can emit a better
9047 error message later. */
9048 if (decl_context != PARM)
9050 type = check_var_type (unqualified_id, type);
9051 if (type == error_mark_node)
9052 return error_mark_node;
9055 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9056 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9058 if (decl_context == PARM || decl_context == CATCHPARM)
9060 if (ctype || in_namespace)
9061 error ("cannot use %<::%> in parameter declaration");
9063 /* A parameter declared as an array of T is really a pointer to T.
9064 One declared as a function is really a pointer to a function.
9065 One declared as a member is really a pointer to member. */
9067 if (TREE_CODE (type) == ARRAY_TYPE)
9069 /* Transfer const-ness of array into that of type pointed to. */
9070 type = build_pointer_type (TREE_TYPE (type));
9071 type_quals = TYPE_UNQUALIFIED;
9073 else if (TREE_CODE (type) == FUNCTION_TYPE)
9074 type = build_pointer_type (type);
9080 if (decl_context == PARM)
9082 decl = cp_build_parm_decl (unqualified_id, type);
9084 bad_specifiers (decl, "parameter", virtualp,
9085 memfn_quals != TYPE_UNQUALIFIED,
9086 inlinep, friendp, raises != NULL_TREE);
9088 else if (decl_context == FIELD)
9090 /* The C99 flexible array extension. */
9091 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9092 && TYPE_DOMAIN (type) == NULL_TREE)
9094 tree itype = compute_array_index_type (dname, integer_zero_node);
9095 type = build_cplus_array_type (TREE_TYPE (type), itype);
9098 if (type == error_mark_node)
9100 /* Happens when declaring arrays of sizes which
9101 are error_mark_node, for example. */
9104 else if (in_namespace && !friendp)
9106 /* Something like struct S { int N::j; }; */
9107 error ("invalid use of %<::%>");
9108 return error_mark_node;
9110 else if (TREE_CODE (type) == FUNCTION_TYPE)
9113 tree function_context;
9117 if (ctype == NULL_TREE)
9118 ctype = current_class_type;
9120 if (ctype == NULL_TREE)
9122 error ("can't make %qD into a method -- not in a class",
9124 return error_mark_node;
9127 /* ``A union may [ ... ] not [ have ] virtual functions.''
9129 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9131 error ("function %qD declared virtual inside a union",
9133 return error_mark_node;
9136 if (NEW_DELETE_OPNAME_P (unqualified_id))
9140 error ("%qD cannot be declared virtual, since it "
9146 else if (staticp < 2)
9147 type = build_memfn_type (type, ctype, memfn_quals);
9150 /* Check that the name used for a destructor makes sense. */
9151 if (sfk == sfk_destructor)
9153 tree uqname = id_declarator->u.id.unqualified_name;
9157 gcc_assert (friendp);
9158 error ("expected qualified name in friend declaration "
9159 "for destructor %qD", uqname);
9160 return error_mark_node;
9163 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9165 error ("declaration of %qD as member of %qT",
9167 return error_mark_node;
9170 else if (sfk == sfk_constructor && friendp)
9172 error ("expected qualified name in friend declaration "
9173 "for constructor %qD",
9174 id_declarator->u.id.unqualified_name);
9175 return error_mark_node;
9178 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9179 function_context = (ctype != NULL_TREE) ?
9180 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9181 publicp = (! friendp || ! staticp)
9182 && function_context == NULL_TREE;
9183 decl = grokfndecl (ctype, type,
9184 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9185 ? unqualified_id : dname,
9188 virtualp, flags, memfn_quals, raises,
9189 friendp ? -1 : 0, friendp, publicp, inlinep,
9191 funcdef_flag, template_count, in_namespace,
9192 attrlist, declarator->id_loc);
9193 if (decl == NULL_TREE)
9194 return error_mark_node;
9196 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9197 /* The decl and setting of decl_attr is also turned off. */
9198 decl = build_decl_attribute_variant (decl, decl_attr);
9201 /* [class.conv.ctor]
9203 A constructor declared without the function-specifier
9204 explicit that can be called with a single parameter
9205 specifies a conversion from the type of its first
9206 parameter to the type of its class. Such a constructor
9207 is called a converting constructor. */
9209 DECL_NONCONVERTING_P (decl) = 1;
9211 else if (TREE_CODE (type) == METHOD_TYPE)
9213 /* We only get here for friend declarations of
9214 members of other classes. */
9215 /* All method decls are public, so tell grokfndecl to set
9216 TREE_PUBLIC, also. */
9217 decl = grokfndecl (ctype, type,
9218 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9219 ? unqualified_id : dname,
9222 virtualp, flags, memfn_quals, raises,
9223 friendp ? -1 : 0, friendp, 1, 0, sfk,
9224 funcdef_flag, template_count, in_namespace,
9226 declarator->id_loc);
9227 if (decl == NULL_TREE)
9228 return error_mark_node;
9230 else if (!staticp && !dependent_type_p (type)
9231 && !COMPLETE_TYPE_P (complete_type (type))
9232 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9235 error ("field %qD has incomplete type", unqualified_id);
9237 error ("name %qT has incomplete type", type);
9239 /* If we're instantiating a template, tell them which
9240 instantiation made the field's type be incomplete. */
9241 if (current_class_type
9242 && TYPE_NAME (current_class_type)
9243 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9245 && declspecs->type == type)
9246 error (" in instantiation of template %qT",
9247 current_class_type);
9249 return error_mark_node;
9255 error ("%qE is neither function nor member function; "
9256 "cannot be declared friend", unqualified_id);
9264 /* Friends are treated specially. */
9265 if (ctype == current_class_type)
9266 ; /* We already issued a permerror. */
9267 else if (decl && DECL_NAME (decl))
9269 if (template_class_depth (current_class_type) == 0)
9271 decl = check_explicit_specialization
9272 (unqualified_id, decl, template_count,
9273 2 * funcdef_flag + 4);
9274 if (decl == error_mark_node)
9275 return error_mark_node;
9278 decl = do_friend (ctype, unqualified_id, decl,
9284 return error_mark_node;
9287 /* Structure field. It may not be a function, except for C++. */
9289 if (decl == NULL_TREE)
9295 /* An attempt is being made to initialize a non-static
9296 member. But, from [class.mem]:
9298 4 A member-declarator can contain a
9299 constant-initializer only if it declares a static
9300 member (_class.static_) of integral or enumeration
9301 type, see _class.static.data_.
9303 This used to be relatively common practice, but
9304 the rest of the compiler does not correctly
9305 handle the initialization unless the member is
9306 static so we make it static below. */
9307 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9309 permerror (input_location, "making %qD static", unqualified_id);
9313 if (uses_template_parms (type))
9314 /* We'll check at instantiation time. */
9316 else if (check_static_variable_definition (unqualified_id,
9318 /* If we just return the declaration, crashes
9319 will sometimes occur. We therefore return
9320 void_type_node, as if this was a friend
9321 declaration, to cause callers to completely
9322 ignore this declaration. */
9323 return error_mark_node;
9328 /* C++ allows static class members. All other work
9329 for this is done by grokfield. */
9330 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9331 set_linkage_for_static_data_member (decl);
9332 /* Even if there is an in-class initialization, DECL
9333 is considered undefined until an out-of-class
9334 definition is provided. */
9335 DECL_EXTERNAL (decl) = 1;
9338 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9342 decl = build_decl (input_location,
9343 FIELD_DECL, unqualified_id, type);
9344 DECL_NONADDRESSABLE_P (decl) = bitfield;
9345 if (bitfield && !unqualified_id)
9346 TREE_NO_WARNING (decl) = 1;
9348 if (storage_class == sc_mutable)
9350 DECL_MUTABLE_P (decl) = 1;
9351 storage_class = sc_none;
9355 bad_specifiers (decl, "field", virtualp,
9356 memfn_quals != TYPE_UNQUALIFIED,
9357 inlinep, friendp, raises != NULL_TREE);
9360 else if (TREE_CODE (type) == FUNCTION_TYPE
9361 || TREE_CODE (type) == METHOD_TYPE)
9366 if (!unqualified_id)
9367 return error_mark_node;
9369 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9370 original_name = dname;
9372 original_name = unqualified_id;
9374 if (storage_class == sc_auto)
9375 error ("storage class %<auto%> invalid for function %qs", name);
9376 else if (storage_class == sc_register)
9377 error ("storage class %<register%> invalid for function %qs", name);
9379 error ("storage class %<__thread%> invalid for function %qs", name);
9381 /* Function declaration not at top level.
9382 Storage classes other than `extern' are not allowed
9383 and `extern' makes no difference. */
9384 if (! toplevel_bindings_p ()
9385 && (storage_class == sc_static
9386 || declspecs->specs[(int)ds_inline])
9389 if (storage_class == sc_static)
9390 pedwarn (input_location, OPT_pedantic,
9391 "%<static%> specified invalid for function %qs "
9392 "declared out of global scope", name);
9394 pedwarn (input_location, OPT_pedantic,
9395 "%<inline%> specifier invalid for function %qs "
9396 "declared out of global scope", name);
9399 if (ctype != NULL_TREE
9400 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9402 error ("%q#T is not a class or a namespace", ctype);
9406 if (ctype == NULL_TREE)
9410 error ("virtual non-class function %qs", name);
9413 else if (sfk == sfk_constructor
9414 || sfk == sfk_destructor)
9417 ? "%qs defined in a non-class scope"
9418 : "%qs declared in a non-class scope", name);
9422 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9423 && !NEW_DELETE_OPNAME_P (original_name))
9424 type = build_method_type_directly (ctype,
9426 TYPE_ARG_TYPES (type));
9428 /* Record presence of `static'. */
9429 publicp = (ctype != NULL_TREE
9430 || storage_class == sc_extern
9431 || storage_class != sc_static);
9433 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9434 virtualp, flags, memfn_quals, raises,
9436 publicp, inlinep, sfk, funcdef_flag,
9437 template_count, in_namespace, attrlist,
9438 declarator->id_loc);
9439 if (decl == NULL_TREE)
9440 return error_mark_node;
9444 int invalid_static = 0;
9446 /* Don't allow a static member function in a class, and forbid
9447 declaring main to be static. */
9448 if (TREE_CODE (type) == METHOD_TYPE)
9450 permerror (input_location, "cannot declare member function %qD to have "
9451 "static linkage", decl);
9454 else if (current_function_decl)
9456 /* FIXME need arm citation */
9457 error ("cannot declare static function inside another function");
9464 storage_class = sc_none;
9470 /* It's a variable. */
9472 /* An uninitialized decl with `extern' is a reference. */
9473 decl = grokvardecl (type, unqualified_id,
9476 (type_quals & TYPE_QUAL_CONST) != 0,
9477 ctype ? ctype : in_namespace);
9478 bad_specifiers (decl, "variable", virtualp,
9479 memfn_quals != TYPE_UNQUALIFIED,
9480 inlinep, friendp, raises != NULL_TREE);
9484 DECL_CONTEXT (decl) = ctype;
9487 permerror (input_location, "%<static%> may not be used when defining "
9488 "(as opposed to declaring) a static data member");
9490 storage_class = sc_none;
9492 if (storage_class == sc_register && TREE_STATIC (decl))
9494 error ("static member %qD declared %<register%>", decl);
9495 storage_class = sc_none;
9497 if (storage_class == sc_extern && pedantic)
9499 pedwarn (input_location, OPT_pedantic,
9500 "cannot explicitly declare member %q#D to have "
9501 "extern linkage", decl);
9502 storage_class = sc_none;
9507 if (storage_class == sc_extern && initialized && !funcdef_flag)
9509 if (toplevel_bindings_p ())
9511 /* It's common practice (and completely valid) to have a const
9512 be initialized and declared extern. */
9513 if (!(type_quals & TYPE_QUAL_CONST))
9514 warning (0, "%qs initialized and declared %<extern%>", name);
9518 error ("%qs has both %<extern%> and initializer", name);
9519 return error_mark_node;
9523 /* Record `register' declaration for warnings on &
9524 and in case doing stupid register allocation. */
9526 if (storage_class == sc_register)
9527 DECL_REGISTER (decl) = 1;
9528 else if (storage_class == sc_extern)
9529 DECL_THIS_EXTERN (decl) = 1;
9530 else if (storage_class == sc_static)
9531 DECL_THIS_STATIC (decl) = 1;
9533 /* Record constancy and volatility on the DECL itself . There's
9534 no need to do this when processing a template; we'll do this
9535 for the instantiated declaration based on the type of DECL. */
9536 if (!processing_template_decl)
9537 cp_apply_type_quals_to_decl (type_quals, decl);
9543 /* Subroutine of start_function. Ensure that each of the parameter
9544 types (as listed in PARMS) is complete, as is required for a
9545 function definition. */
9548 require_complete_types_for_parms (tree parms)
9550 for (; parms; parms = TREE_CHAIN (parms))
9552 if (dependent_type_p (TREE_TYPE (parms)))
9554 if (!VOID_TYPE_P (TREE_TYPE (parms))
9555 && complete_type_or_else (TREE_TYPE (parms), parms))
9557 relayout_decl (parms);
9558 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9561 /* grokparms or complete_type_or_else will have already issued
9563 TREE_TYPE (parms) = error_mark_node;
9567 /* Returns nonzero if T is a local variable. */
9570 local_variable_p (const_tree t)
9572 if ((TREE_CODE (t) == VAR_DECL
9573 /* A VAR_DECL with a context that is a _TYPE is a static data
9575 && !TYPE_P (CP_DECL_CONTEXT (t))
9576 /* Any other non-local variable must be at namespace scope. */
9577 && !DECL_NAMESPACE_SCOPE_P (t))
9578 || (TREE_CODE (t) == PARM_DECL))
9584 /* Like local_variable_p, but suitable for use as a tree-walking
9588 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9589 void *data ATTRIBUTE_UNUSED)
9591 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9593 else if (TYPE_P (*tp))
9600 /* Check that ARG, which is a default-argument expression for a
9601 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9602 something goes wrong. DECL may also be a _TYPE node, rather than a
9603 DECL, if there is no DECL available. */
9606 check_default_argument (tree decl, tree arg)
9611 if (TREE_CODE (arg) == DEFAULT_ARG)
9612 /* We get a DEFAULT_ARG when looking at an in-class declaration
9613 with a default argument. Ignore the argument for now; we'll
9614 deal with it after the class is complete. */
9623 decl_type = TREE_TYPE (decl);
9625 if (arg == error_mark_node
9626 || decl == error_mark_node
9627 || TREE_TYPE (arg) == error_mark_node
9628 || decl_type == error_mark_node)
9629 /* Something already went wrong. There's no need to check
9631 return error_mark_node;
9633 /* [dcl.fct.default]
9635 A default argument expression is implicitly converted to the
9637 if (!TREE_TYPE (arg)
9638 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9641 error ("default argument for %q#D has type %qT",
9642 decl, TREE_TYPE (arg));
9644 error ("default argument for parameter of type %qT has type %qT",
9645 decl_type, TREE_TYPE (arg));
9647 return error_mark_node;
9650 /* [dcl.fct.default]
9652 Local variables shall not be used in default argument
9655 The keyword `this' shall not be used in a default argument of a
9657 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9660 error ("default argument %qE uses local variable %qD", arg, var);
9661 return error_mark_node;
9668 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9671 type_is_deprecated (tree type)
9673 enum tree_code code;
9674 if (TREE_DEPRECATED (type))
9676 if (TYPE_NAME (type)
9677 && TREE_DEPRECATED (TYPE_NAME (type)))
9680 code = TREE_CODE (type);
9682 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9683 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9684 || code == METHOD_TYPE || code == ARRAY_TYPE)
9685 return type_is_deprecated (TREE_TYPE (type));
9687 if (TYPE_PTRMEMFUNC_P (type))
9688 return type_is_deprecated
9689 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9694 /* Decode the list of parameter types for a function type.
9695 Given the list of things declared inside the parens,
9696 return a list of types.
9698 If this parameter does not end with an ellipsis, we append
9701 *PARMS is set to the chain of PARM_DECLs created. */
9704 grokparms (tree parmlist, tree *parms)
9706 tree result = NULL_TREE;
9707 tree decls = NULL_TREE;
9711 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9713 tree type = NULL_TREE;
9714 tree init = TREE_PURPOSE (parm);
9715 tree decl = TREE_VALUE (parm);
9718 if (parm == void_list_node)
9721 if (! decl || TREE_TYPE (decl) == error_mark_node)
9724 type = TREE_TYPE (decl);
9725 if (VOID_TYPE_P (type))
9727 if (same_type_p (type, void_type_node)
9728 && DECL_SELF_REFERENCE_P (type)
9729 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9730 /* this is a parmlist of `(void)', which is ok. */
9732 cxx_incomplete_type_error (decl, type);
9733 /* It's not a good idea to actually create parameters of
9734 type `void'; other parts of the compiler assume that a
9735 void type terminates the parameter list. */
9736 type = error_mark_node;
9737 TREE_TYPE (decl) = error_mark_node;
9740 if (type != error_mark_node
9741 && TYPE_FOR_JAVA (type)
9742 && MAYBE_CLASS_TYPE_P (type))
9744 error ("parameter %qD has Java class type", decl);
9745 type = error_mark_node;
9746 TREE_TYPE (decl) = error_mark_node;
9750 if (type != error_mark_node
9751 && (errmsg = targetm.invalid_parameter_type (type)))
9754 type = error_mark_node;
9755 TREE_TYPE (decl) = error_mark_node;
9758 if (type != error_mark_node)
9760 if (deprecated_state != DEPRECATED_SUPPRESS)
9762 tree deptype = type_is_deprecated (type);
9764 warn_deprecated_use (deptype, NULL_TREE);
9767 /* Top-level qualifiers on the parameters are
9768 ignored for function types. */
9769 type = cp_build_qualified_type (type, 0);
9770 if (TREE_CODE (type) == METHOD_TYPE)
9772 error ("parameter %qD invalidly declared method type", decl);
9773 type = build_pointer_type (type);
9774 TREE_TYPE (decl) = type;
9776 else if (abstract_virtuals_error (decl, type))
9777 any_error = 1; /* Seems like a good idea. */
9778 else if (POINTER_TYPE_P (type))
9780 /* [dcl.fct]/6, parameter types cannot contain pointers
9781 (references) to arrays of unknown bound. */
9782 tree t = TREE_TYPE (type);
9783 int ptr = TYPE_PTR_P (type);
9789 else if (TREE_CODE (t) != ARRAY_TYPE)
9791 else if (!TYPE_DOMAIN (t))
9795 if (TREE_CODE (t) == ARRAY_TYPE)
9796 error ("parameter %qD includes %s to array of unknown "
9798 decl, ptr ? "pointer" : "reference", t);
9803 else if (init && !processing_template_decl)
9804 init = check_default_argument (decl, init);
9807 if (TREE_CODE (decl) == PARM_DECL
9808 && FUNCTION_PARAMETER_PACK_P (decl)
9809 && TREE_CHAIN (parm)
9810 && TREE_CHAIN (parm) != void_list_node)
9811 error ("parameter packs must be at the end of the parameter list");
9813 TREE_CHAIN (decl) = decls;
9815 result = tree_cons (init, type, result);
9817 decls = nreverse (decls);
9818 result = nreverse (result);
9820 result = chainon (result, void_list_node);
9827 /* D is a constructor or overloaded `operator='.
9829 Let T be the class in which D is declared. Then, this function
9832 -1 if D's is an ill-formed constructor or copy assignment operator
9833 whose first parameter is of type `T'.
9834 0 if D is not a copy constructor or copy assignment
9836 1 if D is a copy constructor or copy assignment operator whose
9837 first parameter is a reference to const qualified T.
9838 2 if D is a copy constructor or copy assignment operator whose
9839 first parameter is a reference to non-const qualified T.
9841 This function can be used as a predicate. Positive values indicate
9842 a copy constructor and nonzero values indicate a copy assignment
9846 copy_fn_p (const_tree d)
9852 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9854 if (TREE_CODE (d) == TEMPLATE_DECL
9855 || (DECL_TEMPLATE_INFO (d)
9856 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9857 /* Instantiations of template member functions are never copy
9858 functions. Note that member functions of templated classes are
9859 represented as template functions internally, and we must
9860 accept those as copy functions. */
9863 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9867 arg_type = TREE_VALUE (args);
9868 if (arg_type == error_mark_node)
9871 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9873 /* Pass by value copy assignment operator. */
9876 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9877 && !TYPE_REF_IS_RVALUE (arg_type)
9878 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9880 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9886 args = TREE_CHAIN (args);
9888 if (args && args != void_list_node && !TREE_PURPOSE (args))
9889 /* There are more non-optional args. */
9895 /* D is a constructor or overloaded `operator='.
9897 Let T be the class in which D is declared. Then, this function
9898 returns true when D is a move constructor or move assignment
9899 operator, false otherwise. */
9902 move_fn_p (const_tree d)
9906 bool result = false;
9908 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9910 if (cxx_dialect == cxx98)
9911 /* There are no move constructors if we are in C++98 mode. */
9914 if (TREE_CODE (d) == TEMPLATE_DECL
9915 || (DECL_TEMPLATE_INFO (d)
9916 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9917 /* Instantiations of template member functions are never copy
9918 functions. Note that member functions of templated classes are
9919 represented as template functions internally, and we must
9920 accept those as copy functions. */
9923 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9927 arg_type = TREE_VALUE (args);
9928 if (arg_type == error_mark_node)
9931 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9932 && TYPE_REF_IS_RVALUE (arg_type)
9933 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9937 args = TREE_CHAIN (args);
9939 if (args && args != void_list_node && !TREE_PURPOSE (args))
9940 /* There are more non-optional args. */
9946 /* Remember any special properties of member function DECL. */
9949 grok_special_member_properties (tree decl)
9953 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9956 class_type = DECL_CONTEXT (decl);
9957 if (DECL_CONSTRUCTOR_P (decl))
9959 int ctor = copy_fn_p (decl);
9961 if (!DECL_ARTIFICIAL (decl))
9962 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9968 A non-template constructor for class X is a copy
9969 constructor if its first parameter is of type X&, const
9970 X&, volatile X& or const volatile X&, and either there
9971 are no other parameters or else all other parameters have
9972 default arguments. */
9973 TYPE_HAS_INIT_REF (class_type) = 1;
9974 if (!DECL_DEFAULTED_FN (decl))
9975 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9977 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9979 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9981 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9982 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9983 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9985 else if (is_list_ctor (decl))
9986 TYPE_HAS_LIST_CTOR (class_type) = 1;
9988 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9992 A non-template assignment operator for class X is a copy
9993 assignment operator if its parameter is of type X, X&, const
9994 X&, volatile X& or const volatile X&. */
9996 int assop = copy_fn_p (decl);
10000 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10001 if (!DECL_DEFAULTED_FN (decl))
10002 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10004 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10009 /* Check a constructor DECL has the correct form. Complains
10010 if the class has a constructor of the form X(X). */
10013 grok_ctor_properties (const_tree ctype, const_tree decl)
10015 int ctor_parm = copy_fn_p (decl);
10021 A declaration of a constructor for a class X is ill-formed if
10022 its first parameter is of type (optionally cv-qualified) X
10023 and either there are no other parameters or else all other
10024 parameters have default arguments.
10026 We *don't* complain about member template instantiations that
10027 have this form, though; they can occur as we try to decide
10028 what constructor to use during overload resolution. Since
10029 overload resolution will never prefer such a constructor to
10030 the non-template copy constructor (which is either explicitly
10031 or implicitly defined), there's no need to worry about their
10032 existence. Theoretically, they should never even be
10033 instantiated, but that's hard to forestall. */
10034 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10042 /* An operator with this code is unary, but can also be binary. */
10045 ambi_op_p (enum tree_code code)
10047 return (code == INDIRECT_REF
10048 || code == ADDR_EXPR
10049 || code == UNARY_PLUS_EXPR
10050 || code == NEGATE_EXPR
10051 || code == PREINCREMENT_EXPR
10052 || code == PREDECREMENT_EXPR);
10055 /* An operator with this name can only be unary. */
10058 unary_op_p (enum tree_code code)
10060 return (code == TRUTH_NOT_EXPR
10061 || code == BIT_NOT_EXPR
10062 || code == COMPONENT_REF
10063 || code == TYPE_EXPR);
10066 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10067 errors are issued for invalid declarations. */
10070 grok_op_properties (tree decl, bool complain)
10072 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10074 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10075 tree name = DECL_NAME (decl);
10076 enum tree_code operator_code;
10081 /* Count the number of arguments and check for ellipsis. */
10082 for (argtype = argtypes, arity = 0;
10083 argtype && argtype != void_list_node;
10084 argtype = TREE_CHAIN (argtype))
10086 ellipsis_p = !argtype;
10088 class_type = DECL_CONTEXT (decl);
10089 if (class_type && !CLASS_TYPE_P (class_type))
10090 class_type = NULL_TREE;
10092 if (DECL_CONV_FN_P (decl))
10093 operator_code = TYPE_EXPR;
10097 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10098 if (ansi_opname (CODE) == name) \
10100 operator_code = (CODE); \
10103 else if (ansi_assopname (CODE) == name) \
10105 operator_code = (CODE); \
10106 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10110 #include "operators.def"
10111 #undef DEF_OPERATOR
10113 gcc_unreachable ();
10116 gcc_assert (operator_code != MAX_TREE_CODES);
10117 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10120 switch (operator_code)
10123 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10127 TYPE_GETS_DELETE (class_type) |= 1;
10131 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10134 case VEC_DELETE_EXPR:
10135 TYPE_GETS_DELETE (class_type) |= 2;
10142 /* [basic.std.dynamic.allocation]/1:
10144 A program is ill-formed if an allocation function is declared
10145 in a namespace scope other than global scope or declared static
10148 The same also holds true for deallocation functions. */
10149 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10150 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10152 if (DECL_NAMESPACE_SCOPE_P (decl))
10154 if (CP_DECL_CONTEXT (decl) != global_namespace)
10156 error ("%qD may not be declared within a namespace", decl);
10159 else if (!TREE_PUBLIC (decl))
10161 error ("%qD may not be declared as static", decl);
10167 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10169 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10170 DECL_IS_OPERATOR_NEW (decl) = 1;
10172 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10173 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10176 /* An operator function must either be a non-static member function
10177 or have at least one parameter of a class, a reference to a class,
10178 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10179 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10181 if (operator_code == TYPE_EXPR
10182 || operator_code == CALL_EXPR
10183 || operator_code == COMPONENT_REF
10184 || operator_code == ARRAY_REF
10185 || operator_code == NOP_EXPR)
10187 error ("%qD must be a nonstatic member function", decl);
10194 if (DECL_STATIC_FUNCTION_P (decl))
10196 error ("%qD must be either a non-static member "
10197 "function or a non-member function", decl);
10201 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10203 tree arg = non_reference (TREE_VALUE (p));
10204 if (arg == error_mark_node)
10207 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10208 because these checks are performed even on
10209 template functions. */
10210 if (MAYBE_CLASS_TYPE_P (arg)
10211 || TREE_CODE (arg) == ENUMERAL_TYPE)
10215 if (!p || p == void_list_node)
10218 error ("%qD must have an argument of class or "
10219 "enumerated type", decl);
10225 /* There are no restrictions on the arguments to an overloaded
10227 if (operator_code == CALL_EXPR)
10230 /* Warn about conversion operators that will never be used. */
10231 if (IDENTIFIER_TYPENAME_P (name)
10232 && ! DECL_TEMPLATE_INFO (decl)
10234 /* Warn only declaring the function; there is no need to
10235 warn again about out-of-class definitions. */
10236 && class_type == current_class_type)
10238 tree t = TREE_TYPE (name);
10239 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10240 const char *what = 0;
10243 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10245 if (TREE_CODE (t) == VOID_TYPE)
10247 else if (class_type)
10249 if (t == class_type)
10250 what = "the same type";
10251 /* Don't force t to be complete here. */
10252 else if (MAYBE_CLASS_TYPE_P (t)
10253 && COMPLETE_TYPE_P (t)
10254 && DERIVED_FROM_P (t, class_type))
10255 what = "a base class";
10259 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10260 "conversion operator",
10261 ref ? "a reference to " : "", what);
10264 if (operator_code == COND_EXPR)
10267 error ("ISO C++ prohibits overloading operator ?:");
10270 else if (ellipsis_p)
10272 error ("%qD must not have variable number of arguments", decl);
10275 else if (ambi_op_p (operator_code))
10278 /* We pick the one-argument operator codes by default, so
10279 we don't have to change anything. */
10281 else if (arity == 2)
10283 /* If we thought this was a unary operator, we now know
10284 it to be a binary operator. */
10285 switch (operator_code)
10288 operator_code = MULT_EXPR;
10292 operator_code = BIT_AND_EXPR;
10295 case UNARY_PLUS_EXPR:
10296 operator_code = PLUS_EXPR;
10300 operator_code = MINUS_EXPR;
10303 case PREINCREMENT_EXPR:
10304 operator_code = POSTINCREMENT_EXPR;
10307 case PREDECREMENT_EXPR:
10308 operator_code = POSTDECREMENT_EXPR;
10312 gcc_unreachable ();
10315 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10317 if ((operator_code == POSTINCREMENT_EXPR
10318 || operator_code == POSTDECREMENT_EXPR)
10319 && ! processing_template_decl
10320 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10323 error ("postfix %qD must take %<int%> as its argument",
10326 error ("postfix %qD must take %<int%> as its second "
10334 error ("%qD must take either zero or one argument", decl);
10336 error ("%qD must take either one or two arguments", decl);
10340 /* More Effective C++ rule 6. */
10342 && (operator_code == POSTINCREMENT_EXPR
10343 || operator_code == POSTDECREMENT_EXPR
10344 || operator_code == PREINCREMENT_EXPR
10345 || operator_code == PREDECREMENT_EXPR))
10347 tree arg = TREE_VALUE (argtypes);
10348 tree ret = TREE_TYPE (TREE_TYPE (decl));
10349 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10350 arg = TREE_TYPE (arg);
10351 arg = TYPE_MAIN_VARIANT (arg);
10352 if (operator_code == PREINCREMENT_EXPR
10353 || operator_code == PREDECREMENT_EXPR)
10355 if (TREE_CODE (ret) != REFERENCE_TYPE
10356 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10358 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10359 build_reference_type (arg));
10363 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10364 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10368 else if (unary_op_p (operator_code))
10373 error ("%qD must take %<void%>", decl);
10375 error ("%qD must take exactly one argument", decl);
10379 else /* if (binary_op_p (operator_code)) */
10384 error ("%qD must take exactly one argument", decl);
10386 error ("%qD must take exactly two arguments", decl);
10390 /* More Effective C++ rule 7. */
10392 && (operator_code == TRUTH_ANDIF_EXPR
10393 || operator_code == TRUTH_ORIF_EXPR
10394 || operator_code == COMPOUND_EXPR))
10395 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10399 /* Effective C++ rule 23. */
10402 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10403 && (operator_code == PLUS_EXPR
10404 || operator_code == MINUS_EXPR
10405 || operator_code == TRUNC_DIV_EXPR
10406 || operator_code == MULT_EXPR
10407 || operator_code == TRUNC_MOD_EXPR)
10408 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10409 warning (OPT_Weffc__, "%qD should return by value", decl);
10411 /* [over.oper]/8 */
10412 for (; argtypes && argtypes != void_list_node;
10413 argtypes = TREE_CHAIN (argtypes))
10414 if (TREE_PURPOSE (argtypes))
10416 TREE_PURPOSE (argtypes) = NULL_TREE;
10417 if (operator_code == POSTINCREMENT_EXPR
10418 || operator_code == POSTDECREMENT_EXPR)
10420 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10425 error ("%qD cannot have default arguments", decl);
10433 /* Return a string giving the keyword associate with CODE. */
10435 static const char *
10436 tag_name (enum tag_types code)
10448 case typename_type:
10451 gcc_unreachable ();
10455 /* Name lookup in an elaborated-type-specifier (after the keyword
10456 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10457 elaborated-type-specifier is invalid, issue a diagnostic and return
10458 error_mark_node; otherwise, return the *_TYPE to which it referred.
10459 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10462 check_elaborated_type_specifier (enum tag_types tag_code,
10464 bool allow_template_p)
10470 struct S { struct S *p; };
10472 name lookup will find the TYPE_DECL for the implicit "S::S"
10473 typedef. Adjust for that here. */
10474 if (DECL_SELF_REFERENCE_P (decl))
10475 decl = TYPE_NAME (TREE_TYPE (decl));
10477 type = TREE_TYPE (decl);
10479 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10480 is false for this case as well. */
10481 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10483 error ("using template type parameter %qT after %qs",
10484 type, tag_name (tag_code));
10485 return error_mark_node;
10489 If the identifier resolves to a typedef-name or a template
10490 type-parameter, the elaborated-type-specifier is ill-formed.
10492 In other words, the only legitimate declaration to use in the
10493 elaborated type specifier is the implicit typedef created when
10494 the type is declared. */
10495 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10496 && tag_code != typename_type)
10498 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10499 error ("%q+D has a previous declaration here", decl);
10500 return error_mark_node;
10502 else if (TREE_CODE (type) != RECORD_TYPE
10503 && TREE_CODE (type) != UNION_TYPE
10504 && tag_code != enum_type
10505 && tag_code != typename_type)
10507 error ("%qT referred to as %qs", type, tag_name (tag_code));
10508 error ("%q+T has a previous declaration here", type);
10509 return error_mark_node;
10511 else if (TREE_CODE (type) != ENUMERAL_TYPE
10512 && tag_code == enum_type)
10514 error ("%qT referred to as enum", type);
10515 error ("%q+T has a previous declaration here", type);
10516 return error_mark_node;
10518 else if (!allow_template_p
10519 && TREE_CODE (type) == RECORD_TYPE
10520 && CLASSTYPE_IS_TEMPLATE (type))
10522 /* If a class template appears as elaborated type specifier
10523 without a template header such as:
10525 template <class T> class C {};
10526 void f(class C); // No template header here
10528 then the required template argument is missing. */
10529 error ("template argument required for %<%s %T%>",
10530 tag_name (tag_code),
10531 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10532 return error_mark_node;
10538 /* Lookup NAME in elaborate type specifier in scope according to
10539 SCOPE and issue diagnostics if necessary.
10540 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10541 found, and ERROR_MARK_NODE for type error. */
10544 lookup_and_check_tag (enum tag_types tag_code, tree name,
10545 tag_scope scope, bool template_header_p)
10549 if (scope == ts_global)
10551 /* First try ordinary name lookup, ignoring hidden class name
10552 injected via friend declaration. */
10553 decl = lookup_name_prefer_type (name, 2);
10554 /* If that fails, the name will be placed in the smallest
10555 non-class, non-function-prototype scope according to 3.3.1/5.
10556 We may already have a hidden name declared as friend in this
10557 scope. So lookup again but not ignoring hidden names.
10558 If we find one, that name will be made visible rather than
10559 creating a new tag. */
10561 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10564 decl = lookup_type_scope (name, scope);
10566 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10567 decl = DECL_TEMPLATE_RESULT (decl);
10569 if (decl && TREE_CODE (decl) == TYPE_DECL)
10571 /* Look for invalid nested type:
10575 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10577 error ("%qD has the same name as the class in which it is "
10580 return error_mark_node;
10583 /* Two cases we need to consider when deciding if a class
10584 template is allowed as an elaborated type specifier:
10585 1. It is a self reference to its own class.
10586 2. It comes with a template header.
10590 template <class T> class C {
10591 class C *c1; // DECL_SELF_REFERENCE_P is true
10594 template <class U> class C; // template_header_p is true
10595 template <class T> class C<T>::D {
10596 class C *c2; // DECL_SELF_REFERENCE_P is true
10599 t = check_elaborated_type_specifier (tag_code,
10602 | DECL_SELF_REFERENCE_P (decl));
10605 else if (decl && TREE_CODE (decl) == TREE_LIST)
10607 error ("reference to %qD is ambiguous", name);
10608 print_candidates (decl);
10609 return error_mark_node;
10615 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10616 Define the tag as a forward-reference if it is not defined.
10618 If a declaration is given, process it here, and report an error if
10619 multiple declarations are not identical.
10621 SCOPE is TS_CURRENT when this is also a definition. Only look in
10622 the current frame for the name (since C++ allows new names in any
10623 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10624 declaration. Only look beginning from the current scope outward up
10625 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10627 TEMPLATE_HEADER_P is true when this declaration is preceded by
10628 a set of template parameters. */
10631 xref_tag (enum tag_types tag_code, tree name,
10632 tag_scope scope, bool template_header_p)
10634 enum tree_code code;
10636 tree context = NULL_TREE;
10638 timevar_push (TV_NAME_LOOKUP);
10640 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10646 code = RECORD_TYPE;
10652 code = ENUMERAL_TYPE;
10655 gcc_unreachable ();
10658 /* In case of anonymous name, xref_tag is only called to
10659 make type node and push name. Name lookup is not required. */
10660 if (ANON_AGGRNAME_P (name))
10663 t = lookup_and_check_tag (tag_code, name,
10664 scope, template_header_p);
10666 if (t == error_mark_node)
10667 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10669 if (scope != ts_current && t && current_class_type
10670 && template_class_depth (current_class_type)
10671 && template_header_p)
10673 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10674 definition of this tag. Since, in addition, we are currently
10675 processing a (member) template declaration of a template
10676 class, we must be very careful; consider:
10683 { template <class V>
10684 friend struct S1; };
10686 Here, the S2::S1 declaration should not be confused with the
10687 outer declaration. In particular, the inner version should
10688 have a template parameter of level 2, not level 1. This
10689 would be particularly important if the member declaration
10692 template <class V = U> friend struct S1;
10694 say, when we should tsubst into `U' when instantiating
10695 S2. On the other hand, when presented with:
10705 we must find the inner binding eventually. We
10706 accomplish this by making sure that the new type we
10707 create to represent this declaration has the right
10709 context = TYPE_CONTEXT (t);
10715 /* If no such tag is yet defined, create a forward-reference node
10716 and record it as the "definition".
10717 When a real declaration of this type is found,
10718 the forward-reference will be altered into a real type. */
10719 if (code == ENUMERAL_TYPE)
10721 error ("use of enum %q#D without previous declaration", name);
10722 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10726 t = make_class_type (code);
10727 TYPE_CONTEXT (t) = context;
10728 t = pushtag (name, t, scope);
10733 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10735 if (!redeclare_class_template (t, current_template_parms))
10736 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10738 else if (!processing_template_decl
10739 && CLASS_TYPE_P (t)
10740 && CLASSTYPE_IS_TEMPLATE (t))
10742 error ("redeclaration of %qT as a non-template", t);
10743 error ("previous declaration %q+D", t);
10744 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10747 /* Make injected friend class visible. */
10748 if (scope != ts_within_enclosing_non_class
10749 && hidden_name_p (TYPE_NAME (t)))
10751 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10752 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10754 if (TYPE_TEMPLATE_INFO (t))
10756 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10757 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10762 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10766 xref_tag_from_type (tree old, tree id, tag_scope scope)
10768 enum tag_types tag_kind;
10770 if (TREE_CODE (old) == RECORD_TYPE)
10771 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10773 tag_kind = union_type;
10775 if (id == NULL_TREE)
10776 id = TYPE_IDENTIFIER (old);
10778 return xref_tag (tag_kind, id, scope, false);
10781 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10782 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10783 access_* node, and the TREE_VALUE is the type of the base-class.
10784 Non-NULL TREE_TYPE indicates virtual inheritance.
10786 Returns true if the binfo hierarchy was successfully created,
10787 false if an error was detected. */
10790 xref_basetypes (tree ref, tree base_list)
10793 tree binfo, base_binfo;
10794 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10795 unsigned max_bases = 0; /* Maximum direct bases. */
10797 tree default_access;
10798 tree igo_prev; /* Track Inheritance Graph Order. */
10800 if (ref == error_mark_node)
10803 /* The base of a derived class is private by default, all others are
10805 default_access = (TREE_CODE (ref) == RECORD_TYPE
10806 && CLASSTYPE_DECLARED_CLASS (ref)
10807 ? access_private_node : access_public_node);
10809 /* First, make sure that any templates in base-classes are
10810 instantiated. This ensures that if we call ourselves recursively
10811 we do not get confused about which classes are marked and which
10813 basep = &base_list;
10816 tree basetype = TREE_VALUE (*basep);
10818 if (!(processing_template_decl && uses_template_parms (basetype))
10819 && !complete_type_or_else (basetype, NULL))
10820 /* An incomplete type. Remove it from the list. */
10821 *basep = TREE_CHAIN (*basep);
10825 if (TREE_TYPE (*basep))
10827 if (CLASS_TYPE_P (basetype))
10828 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10829 basep = &TREE_CHAIN (*basep);
10833 TYPE_MARKED_P (ref) = 1;
10835 /* The binfo slot should be empty, unless this is an (ill-formed)
10837 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10838 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10840 binfo = make_tree_binfo (max_bases);
10842 TYPE_BINFO (ref) = binfo;
10843 BINFO_OFFSET (binfo) = size_zero_node;
10844 BINFO_TYPE (binfo) = ref;
10846 /* Apply base-class info set up to the variants of this type. */
10847 fixup_type_variants (ref);
10851 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10852 /* An aggregate cannot have baseclasses. */
10853 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10855 if (TREE_CODE (ref) == UNION_TYPE)
10857 error ("derived union %qT invalid", ref);
10864 if (TYPE_FOR_JAVA (ref))
10866 error ("Java class %qT cannot have multiple bases", ref);
10873 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10875 if (TYPE_FOR_JAVA (ref))
10877 error ("Java class %qT cannot have virtual bases", ref);
10882 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10884 tree access = TREE_PURPOSE (base_list);
10885 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10886 tree basetype = TREE_VALUE (base_list);
10888 if (access == access_default_node)
10889 access = default_access;
10891 if (PACK_EXPANSION_P (basetype))
10892 basetype = PACK_EXPANSION_PATTERN (basetype);
10893 if (TREE_CODE (basetype) == TYPE_DECL)
10894 basetype = TREE_TYPE (basetype);
10895 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10897 error ("base type %qT fails to be a struct or class type",
10902 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10903 TYPE_FOR_JAVA (ref) = 1;
10905 base_binfo = NULL_TREE;
10906 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10908 base_binfo = TYPE_BINFO (basetype);
10909 /* The original basetype could have been a typedef'd type. */
10910 basetype = BINFO_TYPE (base_binfo);
10912 /* Inherit flags from the base. */
10913 TYPE_HAS_NEW_OPERATOR (ref)
10914 |= TYPE_HAS_NEW_OPERATOR (basetype);
10915 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10916 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10917 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10918 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10919 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10920 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10921 CLASSTYPE_REPEATED_BASE_P (ref)
10922 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10925 /* We must do this test after we've seen through a typedef
10927 if (TYPE_MARKED_P (basetype))
10929 if (basetype == ref)
10930 error ("recursive type %qT undefined", basetype);
10932 error ("duplicate base type %qT invalid", basetype);
10936 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10937 /* Regenerate the pack expansion for the bases. */
10938 basetype = make_pack_expansion (basetype);
10940 TYPE_MARKED_P (basetype) = 1;
10942 base_binfo = copy_binfo (base_binfo, basetype, ref,
10943 &igo_prev, via_virtual);
10944 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10945 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10947 BINFO_BASE_APPEND (binfo, base_binfo);
10948 BINFO_BASE_ACCESS_APPEND (binfo, access);
10951 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10952 /* If we have space in the vbase vector, we must have shared at
10953 least one of them, and are therefore diamond shaped. */
10954 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10956 /* Unmark all the types. */
10957 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10958 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10959 TYPE_MARKED_P (ref) = 0;
10961 /* Now see if we have a repeated base type. */
10962 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10964 for (base_binfo = binfo; base_binfo;
10965 base_binfo = TREE_CHAIN (base_binfo))
10967 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10969 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10972 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10974 for (base_binfo = binfo; base_binfo;
10975 base_binfo = TREE_CHAIN (base_binfo))
10976 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10977 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10986 /* Begin compiling the definition of an enumeration type.
10989 UNDERLYING_TYPE is the type that will be used as the storage for
10990 the enumeration type. This should be NULL_TREE if no storage type
10993 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10995 Returns the type object, as yet incomplete.
10996 Also records info about it so that build_enumerator
10997 may be used to declare the individual values as they are read. */
11000 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11004 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11006 /* If this is the real definition for a previous forward reference,
11007 fill in the contents in the same object that used to be the
11008 forward reference. */
11010 enumtype = lookup_and_check_tag (enum_type, name,
11011 /*tag_scope=*/ts_current,
11012 /*template_header_p=*/false);
11014 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11016 error_at (input_location, "multiple definition of %q#T", enumtype);
11017 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11018 "previous definition here");
11019 /* Clear out TYPE_VALUES, and start again. */
11020 TYPE_VALUES (enumtype) = NULL_TREE;
11024 /* In case of error, make a dummy enum to allow parsing to
11026 if (enumtype == error_mark_node)
11027 name = make_anon_name ();
11029 enumtype = make_node (ENUMERAL_TYPE);
11030 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11033 if (enumtype == error_mark_node)
11038 SET_SCOPED_ENUM_P (enumtype, 1);
11039 begin_scope (sk_scoped_enum, enumtype);
11041 /* [C++0x dcl.enum]p5:
11043 If not explicitly specified, the underlying type of a scoped
11044 enumeration type is int. */
11045 if (!underlying_type)
11046 underlying_type = integer_type_node;
11049 if (underlying_type)
11051 if (CP_INTEGRAL_TYPE_P (underlying_type))
11053 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11054 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11055 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11056 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11057 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11058 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11059 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11060 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11061 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11062 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11064 else if (!dependent_type_p (underlying_type))
11065 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11066 underlying_type, enumtype);
11072 /* After processing and defining all the values of an enumeration type,
11073 install their decls in the enumeration type and finish it off.
11074 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11077 finish_enum (tree enumtype)
11086 bool use_short_enum;
11091 tree underlying_type = NULL_TREE;
11092 bool fixed_underlying_type_p
11093 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11095 /* We built up the VALUES in reverse order. */
11096 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11098 /* For an enum defined in a template, just set the type of the values;
11099 all further processing is postponed until the template is
11100 instantiated. We need to set the type so that tsubst of a CONST_DECL
11102 if (processing_template_decl)
11104 for (values = TYPE_VALUES (enumtype);
11106 values = TREE_CHAIN (values))
11107 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11108 if (at_function_scope_p ())
11109 add_stmt (build_min (TAG_DEFN, enumtype));
11110 if (SCOPED_ENUM_P (enumtype))
11115 /* Determine the minimum and maximum values of the enumerators. */
11116 if (TYPE_VALUES (enumtype))
11118 minnode = maxnode = NULL_TREE;
11120 for (values = TYPE_VALUES (enumtype);
11122 values = TREE_CHAIN (values))
11124 decl = TREE_VALUE (values);
11126 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11127 each enumerator has the type of its enumeration. Prior to the
11128 closing brace, the type of each enumerator is the type of its
11129 initializing value. */
11130 TREE_TYPE (decl) = enumtype;
11132 /* Update the minimum and maximum values, if appropriate. */
11133 value = DECL_INITIAL (decl);
11134 if (value == error_mark_node)
11135 value = integer_zero_node;
11136 /* Figure out what the minimum and maximum values of the
11137 enumerators are. */
11139 minnode = maxnode = value;
11140 else if (tree_int_cst_lt (maxnode, value))
11142 else if (tree_int_cst_lt (value, minnode))
11149 If the enumerator-list is empty, the underlying type is as if
11150 the enumeration had a single enumerator with value 0. */
11151 minnode = maxnode = integer_zero_node;
11153 /* Compute the number of bits require to represent all values of the
11154 enumeration. We must do this before the type of MINNODE and
11155 MAXNODE are transformed, since tree_int_cst_min_precision relies
11156 on the TREE_TYPE of the value it is passed. */
11157 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11158 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11159 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11160 precision = MAX (lowprec, highprec);
11162 if (!fixed_underlying_type_p)
11164 /* Determine the underlying type of the enumeration.
11168 The underlying type of an enumeration is an integral type that
11169 can represent all the enumerator values defined in the
11170 enumeration. It is implementation-defined which integral type is
11171 used as the underlying type for an enumeration except that the
11172 underlying type shall not be larger than int unless the value of
11173 an enumerator cannot fit in an int or unsigned int.
11175 We use "int" or an "unsigned int" as the underlying type, even if
11176 a smaller integral type would work, unless the user has
11177 explicitly requested that we use the smallest possible type. The
11178 user can request that for all enumerations with a command line
11179 flag, or for just one enumeration with an attribute. */
11181 use_short_enum = flag_short_enums
11182 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11184 for (itk = (use_short_enum ? itk_char : itk_int);
11188 underlying_type = integer_types[itk];
11189 if (TYPE_PRECISION (underlying_type) >= precision
11190 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11193 if (itk == itk_none)
11197 IF no integral type can represent all the enumerator values, the
11198 enumeration is ill-formed. */
11199 error ("no integral type can represent all of the enumerator values "
11200 "for %qT", enumtype);
11201 precision = TYPE_PRECISION (long_long_integer_type_node);
11202 underlying_type = integer_types[itk_unsigned_long_long];
11207 The value of sizeof() applied to an enumeration type, an object
11208 of an enumeration type, or an enumerator, is the value of sizeof()
11209 applied to the underlying type. */
11210 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11211 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11212 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11213 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11214 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11215 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11217 /* Set the underlying type of the enumeration type to the
11218 computed enumeration type, restricted to the enumerator
11220 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11221 set_min_and_max_values_for_integral_type
11222 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11225 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11227 /* Compute the minimum and maximum values for the type.
11231 For an enumeration where emin is the smallest enumerator and emax
11232 is the largest, the values of the enumeration are the values of the
11233 underlying type in the range bmin to bmax, where bmin and bmax are,
11234 respectively, the smallest and largest values of the smallest bit-
11235 field that can store emin and emax. */
11237 /* The middle-end currently assumes that types with TYPE_PRECISION
11238 narrower than their underlying type are suitably zero or sign
11239 extended to fill their mode. g++ doesn't make these guarantees.
11240 Until the middle-end can represent such paradoxical types, we
11241 set the TYPE_PRECISION to the width of the underlying type. */
11242 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11244 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11246 /* Convert each of the enumerators to the type of the underlying
11247 type of the enumeration. */
11248 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11250 location_t saved_location;
11252 decl = TREE_VALUE (values);
11253 saved_location = input_location;
11254 input_location = DECL_SOURCE_LOCATION (decl);
11255 if (fixed_underlying_type_p)
11256 /* If the enumeration type has a fixed underlying type, we
11257 already checked all of the enumerator values. */
11258 value = DECL_INITIAL (decl);
11260 value = perform_implicit_conversion (underlying_type,
11261 DECL_INITIAL (decl),
11262 tf_warning_or_error);
11263 input_location = saved_location;
11265 /* Do not clobber shared ints. */
11266 value = copy_node (value);
11268 TREE_TYPE (value) = enumtype;
11269 DECL_INITIAL (decl) = value;
11272 /* Fix up all variant types of this enum type. */
11273 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11275 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11276 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11277 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11278 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11279 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11280 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11281 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11282 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11283 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11284 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11285 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11288 /* Finish up the scope of a scoped enumeration. */
11289 if (SCOPED_ENUM_P (enumtype))
11292 /* Finish debugging output for this type. */
11293 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11296 /* Build and install a CONST_DECL for an enumeration constant of the
11297 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11298 Assignment of sequential values by default is handled here. */
11301 build_enumerator (tree name, tree value, tree enumtype)
11307 /* If the VALUE was erroneous, pretend it wasn't there; that will
11308 result in the enum being assigned the next value in sequence. */
11309 if (value == error_mark_node)
11312 /* Remove no-op casts from the value. */
11314 STRIP_TYPE_NOPS (value);
11316 if (! processing_template_decl)
11318 /* Validate and default VALUE. */
11319 if (value != NULL_TREE)
11321 value = integral_constant_value (value);
11323 if (TREE_CODE (value) == INTEGER_CST)
11325 value = perform_integral_promotions (value);
11326 constant_expression_warning (value);
11330 error ("enumerator value for %qD is not an integer constant", name);
11335 /* Default based on previous value. */
11336 if (value == NULL_TREE)
11338 if (TYPE_VALUES (enumtype))
11341 unsigned HOST_WIDE_INT lo;
11345 /* The next value is the previous value plus one.
11346 add_double doesn't know the type of the target expression,
11347 so we must check with int_fits_type_p as well. */
11348 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11349 if (error_operand_p (prev_value))
11350 value = error_mark_node;
11353 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11354 TREE_INT_CST_HIGH (prev_value),
11356 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11358 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11362 error ("overflow in enumeration values at %qD", name);
11363 value = error_mark_node;
11368 value = integer_zero_node;
11371 /* Remove no-op casts from the value. */
11372 STRIP_TYPE_NOPS (value);
11374 /* If the underlying type of the enum is fixed, check whether
11375 the enumerator values fits in the underlying type. If it
11376 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11377 if (ENUM_UNDERLYING_TYPE (enumtype)
11379 && TREE_CODE (value) == INTEGER_CST
11380 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11382 error ("enumerator value %E is too large for underlying type %<%T%>",
11383 value, ENUM_UNDERLYING_TYPE (enumtype));
11385 /* Silently convert the value so that we can continue. */
11386 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11391 /* C++ associates enums with global, function, or class declarations. */
11392 context = current_scope ();
11394 /* Build the actual enumeration constant. Note that the enumeration
11395 constants have the underlying type of the enum (if it is fixed)
11396 or the type of their initializer (if the underlying type of the
11397 enum is not fixed):
11401 If the underlying type is fixed, the type of each enumerator
11402 prior to the closing brace is the underlying type; if the
11403 initializing value of an enumerator cannot be represented by
11404 the underlying type, the program is ill-formed. If the
11405 underlying type is not fixed, the type of each enumerator is
11406 the type of its initializing value.
11408 If the underlying type is not fixed, it will be computed by
11409 finish_enum and we will reset the type of this enumerator. Of
11410 course, if we're processing a template, there may be no value. */
11411 type = value ? TREE_TYPE (value) : NULL_TREE;
11413 if (context && context == current_class_type)
11414 /* This enum declaration is local to the class. We need the full
11415 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11416 decl = build_lang_decl (CONST_DECL, name, type);
11418 /* It's a global enum, or it's local to a function. (Note local to
11419 a function could mean local to a class method. */
11420 decl = build_decl (input_location, CONST_DECL, name, type);
11422 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11423 TREE_CONSTANT (decl) = 1;
11424 TREE_READONLY (decl) = 1;
11425 DECL_INITIAL (decl) = value;
11427 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11428 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11429 on the TYPE_FIELDS list for `S'. (That's so that you can say
11430 things like `S::i' later.) */
11431 finish_member_declaration (decl);
11435 /* Add this enumeration constant to the list for this type. */
11436 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11439 /* Look for an enumerator with the given NAME within the enumeration
11440 type ENUMTYPE. This routine is used primarily for qualified name
11441 lookup into an enumerator in C++0x, e.g.,
11443 enum class Color { Red, Green, Blue };
11445 Color color = Color::Red;
11447 Returns the value corresponding to the enumerator, or
11448 NULL_TREE if no such enumerator was found. */
11450 lookup_enumerator (tree enumtype, tree name)
11453 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11455 e = purpose_member (name, TYPE_VALUES (enumtype));
11456 return e? TREE_VALUE (e) : NULL_TREE;
11460 /* We're defining DECL. Make sure that it's type is OK. */
11463 check_function_type (tree decl, tree current_function_parms)
11465 tree fntype = TREE_TYPE (decl);
11466 tree return_type = complete_type (TREE_TYPE (fntype));
11468 /* In a function definition, arg types must be complete. */
11469 require_complete_types_for_parms (current_function_parms);
11471 if (dependent_type_p (return_type))
11473 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11474 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11476 tree args = TYPE_ARG_TYPES (fntype);
11478 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11479 error ("return type %q#T is incomplete", return_type);
11481 error ("return type has Java class type %q#T", return_type);
11483 /* Make it return void instead. */
11484 if (TREE_CODE (fntype) == METHOD_TYPE)
11485 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11487 TREE_CHAIN (args));
11489 fntype = build_function_type (void_type_node, args);
11491 = build_exception_variant (fntype,
11492 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11495 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11498 /* Create the FUNCTION_DECL for a function definition.
11499 DECLSPECS and DECLARATOR are the parts of the declaration;
11500 they describe the function's name and the type it returns,
11501 but twisted together in a fashion that parallels the syntax of C.
11503 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11504 DECLARATOR is really the DECL for the function we are about to
11505 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11506 indicating that the function is an inline defined in-class.
11508 This function creates a binding context for the function body
11509 as well as setting up the FUNCTION_DECL in current_function_decl.
11511 For C++, we must first check whether that datum makes any sense.
11512 For example, "class A local_a(1,2);" means that variable local_a
11513 is an aggregate of type A, which should have a constructor
11514 applied to it with the argument list [1, 2].
11516 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11517 or may be a BLOCK if the function has been defined previously
11518 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11519 error_mark_node if the function has never been defined, or
11520 a BLOCK if the function has been defined somewhere. */
11523 start_preparsed_function (tree decl1, tree attrs, int flags)
11525 tree ctype = NULL_TREE;
11528 int doing_friend = 0;
11529 struct cp_binding_level *bl;
11530 tree current_function_parms;
11531 struct c_fileinfo *finfo
11532 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11533 bool honor_interface;
11535 /* Sanity check. */
11536 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11537 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11539 fntype = TREE_TYPE (decl1);
11540 if (TREE_CODE (fntype) == METHOD_TYPE)
11541 ctype = TYPE_METHOD_BASETYPE (fntype);
11543 /* ISO C++ 11.4/5. A friend function defined in a class is in
11544 the (lexical) scope of the class in which it is defined. */
11545 if (!ctype && DECL_FRIEND_P (decl1))
11547 ctype = DECL_FRIEND_CONTEXT (decl1);
11549 /* CTYPE could be null here if we're dealing with a template;
11550 for example, `inline friend float foo()' inside a template
11551 will have no CTYPE set. */
11552 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11558 if (DECL_DECLARED_INLINE_P (decl1)
11559 && lookup_attribute ("noinline", attrs))
11560 warning (0, "inline function %q+D given attribute noinline", decl1);
11562 /* Handle gnu_inline attribute. */
11563 if (GNU_INLINE_P (decl1))
11565 DECL_EXTERNAL (decl1) = 1;
11566 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11567 DECL_INTERFACE_KNOWN (decl1) = 1;
11568 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11571 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11572 /* This is a constructor, we must ensure that any default args
11573 introduced by this definition are propagated to the clones
11574 now. The clones are used directly in overload resolution. */
11575 adjust_clone_args (decl1);
11577 /* Sometimes we don't notice that a function is a static member, and
11578 build a METHOD_TYPE for it. Fix that up now. */
11579 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11580 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11582 revert_static_member_fn (decl1);
11586 /* Set up current_class_type, and enter the scope of the class, if
11589 push_nested_class (ctype);
11590 else if (DECL_STATIC_FUNCTION_P (decl1))
11591 push_nested_class (DECL_CONTEXT (decl1));
11593 /* Now that we have entered the scope of the class, we must restore
11594 the bindings for any template parameters surrounding DECL1, if it
11595 is an inline member template. (Order is important; consider the
11596 case where a template parameter has the same name as a field of
11597 the class.) It is not until after this point that
11598 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11599 if (flags & SF_INCLASS_INLINE)
11600 maybe_begin_member_template_processing (decl1);
11602 /* Effective C++ rule 15. */
11604 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11605 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11606 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11608 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11609 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11610 if (!DECL_INITIAL (decl1))
11611 DECL_INITIAL (decl1) = error_mark_node;
11613 /* This function exists in static storage.
11614 (This does not mean `static' in the C sense!) */
11615 TREE_STATIC (decl1) = 1;
11617 /* We must call push_template_decl after current_class_type is set
11618 up. (If we are processing inline definitions after exiting a
11619 class scope, current_class_type will be NULL_TREE until set above
11620 by push_nested_class.) */
11621 if (processing_template_decl)
11623 /* FIXME: Handle error_mark_node more gracefully. */
11624 tree newdecl1 = push_template_decl (decl1);
11625 if (newdecl1 != error_mark_node)
11629 /* We are now in the scope of the function being defined. */
11630 current_function_decl = decl1;
11632 /* Save the parm names or decls from this function's declarator
11633 where store_parm_decls will find them. */
11634 current_function_parms = DECL_ARGUMENTS (decl1);
11636 /* Make sure the parameter and return types are reasonable. When
11637 you declare a function, these types can be incomplete, but they
11638 must be complete when you define the function. */
11639 check_function_type (decl1, current_function_parms);
11641 /* Build the return declaration for the function. */
11642 restype = TREE_TYPE (fntype);
11643 if (DECL_RESULT (decl1) == NULL_TREE)
11647 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11648 DECL_ARTIFICIAL (resdecl) = 1;
11649 DECL_IGNORED_P (resdecl) = 1;
11650 DECL_RESULT (decl1) = resdecl;
11652 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11655 /* Let the user know we're compiling this function. */
11656 announce_function (decl1);
11658 /* Record the decl so that the function name is defined.
11659 If we already have a decl for this name, and it is a FUNCTION_DECL,
11660 use the old decl. */
11661 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11663 /* A specialization is not used to guide overload resolution. */
11664 if (!DECL_FUNCTION_MEMBER_P (decl1)
11665 && !(DECL_USE_TEMPLATE (decl1) &&
11666 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11668 tree olddecl = pushdecl (decl1);
11670 if (olddecl == error_mark_node)
11671 /* If something went wrong when registering the declaration,
11672 use DECL1; we have to have a FUNCTION_DECL to use when
11673 parsing the body of the function. */
11677 /* Otherwise, OLDDECL is either a previous declaration
11678 of the same function or DECL1 itself. */
11680 if (warn_missing_declarations
11681 && olddecl == decl1
11682 && !DECL_MAIN_P (decl1)
11683 && TREE_PUBLIC (decl1)
11684 && !DECL_DECLARED_INLINE_P (decl1))
11688 /* Check whether DECL1 is in an anonymous
11690 for (context = DECL_CONTEXT (decl1);
11692 context = DECL_CONTEXT (context))
11694 if (TREE_CODE (context) == NAMESPACE_DECL
11695 && DECL_NAME (context) == NULL_TREE)
11699 if (context == NULL)
11700 warning (OPT_Wmissing_declarations,
11701 "no previous declaration for %q+D", decl1);
11709 /* We need to set the DECL_CONTEXT. */
11710 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11711 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11713 fntype = TREE_TYPE (decl1);
11715 /* If #pragma weak applies, mark the decl appropriately now.
11716 The pragma only applies to global functions. Because
11717 determining whether or not the #pragma applies involves
11718 computing the mangled name for the declaration, we cannot
11719 apply the pragma until after we have merged this declaration
11720 with any previous declarations; if the original declaration
11721 has a linkage specification, that specification applies to
11722 the definition as well, and may affect the mangled name. */
11723 if (!DECL_CONTEXT (decl1))
11724 maybe_apply_pragma_weak (decl1);
11727 /* Reset this in case the call to pushdecl changed it. */
11728 current_function_decl = decl1;
11730 gcc_assert (DECL_INITIAL (decl1));
11732 /* This function may already have been parsed, in which case just
11733 return; our caller will skip over the body without parsing. */
11734 if (DECL_INITIAL (decl1) != error_mark_node)
11737 /* Initialize RTL machinery. We cannot do this until
11738 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11739 even when processing a template; this is how we get
11740 CFUN set up, and our per-function variables initialized.
11741 FIXME factor out the non-RTL stuff. */
11742 bl = current_binding_level;
11743 allocate_struct_function (decl1, processing_template_decl);
11745 /* Initialize the language data structures. Whenever we start
11746 a new function, we destroy temporaries in the usual way. */
11747 cfun->language = GGC_CNEW (struct language_function);
11748 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11749 current_binding_level = bl;
11751 /* Even though we're inside a function body, we still don't want to
11752 call expand_expr to calculate the size of a variable-sized array.
11753 We haven't necessarily assigned RTL to all variables yet, so it's
11754 not safe to try to expand expressions involving them. */
11755 cfun->dont_save_pending_sizes_p = 1;
11757 /* Start the statement-tree, start the tree now. */
11758 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11760 /* If we are (erroneously) defining a function that we have already
11761 defined before, wipe out what we knew before. */
11762 if (!DECL_PENDING_INLINE_P (decl1))
11763 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11765 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11767 /* We know that this was set up by `grokclassfn'. We do not
11768 wait until `store_parm_decls', since evil parse errors may
11769 never get us to that point. Here we keep the consistency
11770 between `current_class_type' and `current_class_ptr'. */
11771 tree t = DECL_ARGUMENTS (decl1);
11773 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11774 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11776 cp_function_chain->x_current_class_ref
11777 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11778 cp_function_chain->x_current_class_ptr = t;
11780 /* Constructors and destructors need to know whether they're "in
11781 charge" of initializing virtual base classes. */
11782 t = TREE_CHAIN (t);
11783 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11785 current_in_charge_parm = t;
11786 t = TREE_CHAIN (t);
11788 if (DECL_HAS_VTT_PARM_P (decl1))
11790 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11791 current_vtt_parm = t;
11795 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11796 /* Implicitly-defined methods (like the
11797 destructor for a class in which no destructor
11798 is explicitly declared) must not be defined
11799 until their definition is needed. So, we
11800 ignore interface specifications for
11801 compiler-generated functions. */
11802 && !DECL_ARTIFICIAL (decl1));
11804 if (DECL_INTERFACE_KNOWN (decl1))
11806 tree ctx = decl_function_context (decl1);
11808 if (DECL_NOT_REALLY_EXTERN (decl1))
11809 DECL_EXTERNAL (decl1) = 0;
11811 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11812 && TREE_PUBLIC (ctx))
11813 /* This is a function in a local class in an extern inline
11815 comdat_linkage (decl1);
11817 /* If this function belongs to an interface, it is public.
11818 If it belongs to someone else's interface, it is also external.
11819 This only affects inlines and template instantiations. */
11820 else if (!finfo->interface_unknown && honor_interface)
11822 if (DECL_DECLARED_INLINE_P (decl1)
11823 || DECL_TEMPLATE_INSTANTIATION (decl1)
11824 || processing_template_decl)
11826 DECL_EXTERNAL (decl1)
11827 = (finfo->interface_only
11828 || (DECL_DECLARED_INLINE_P (decl1)
11829 && ! flag_implement_inlines
11830 && !DECL_VINDEX (decl1)));
11832 /* For WIN32 we also want to put these in linkonce sections. */
11833 maybe_make_one_only (decl1);
11836 DECL_EXTERNAL (decl1) = 0;
11837 DECL_INTERFACE_KNOWN (decl1) = 1;
11838 /* If this function is in an interface implemented in this file,
11839 make sure that the back end knows to emit this function
11841 if (!DECL_EXTERNAL (decl1))
11842 mark_needed (decl1);
11844 else if (finfo->interface_unknown && finfo->interface_only
11845 && honor_interface)
11847 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11848 interface, we will have both finfo->interface_unknown and
11849 finfo->interface_only set. In that case, we don't want to
11850 use the normal heuristics because someone will supply a
11851 #pragma implementation elsewhere, and deducing it here would
11852 produce a conflict. */
11853 comdat_linkage (decl1);
11854 DECL_EXTERNAL (decl1) = 0;
11855 DECL_INTERFACE_KNOWN (decl1) = 1;
11856 DECL_DEFER_OUTPUT (decl1) = 1;
11860 /* This is a definition, not a reference.
11861 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11862 if (!GNU_INLINE_P (decl1))
11863 DECL_EXTERNAL (decl1) = 0;
11865 if ((DECL_DECLARED_INLINE_P (decl1)
11866 || DECL_TEMPLATE_INSTANTIATION (decl1))
11867 && ! DECL_INTERFACE_KNOWN (decl1)
11868 /* Don't try to defer nested functions for now. */
11869 && ! decl_function_context (decl1))
11870 DECL_DEFER_OUTPUT (decl1) = 1;
11872 DECL_INTERFACE_KNOWN (decl1) = 1;
11875 /* Determine the ELF visibility attribute for the function. We must not
11876 do this before calling "pushdecl", as we must allow "duplicate_decls"
11877 to merge any attributes appropriately. We also need to wait until
11879 if (!DECL_CLONED_FUNCTION_P (decl1))
11880 determine_visibility (decl1);
11882 begin_scope (sk_function_parms, decl1);
11886 if (DECL_DESTRUCTOR_P (decl1)
11887 || (DECL_CONSTRUCTOR_P (decl1)
11888 && targetm.cxx.cdtor_returns_this ()))
11890 cdtor_label = build_decl (input_location,
11891 LABEL_DECL, NULL_TREE, NULL_TREE);
11892 DECL_CONTEXT (cdtor_label) = current_function_decl;
11895 start_fname_decls ();
11897 store_parm_decls (current_function_parms);
11901 /* Like start_preparsed_function, except that instead of a
11902 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11904 Returns 1 on success. If the DECLARATOR is not suitable for a function
11905 (it defines a datum instead), we return 0, which tells
11906 yyparse to report a parse error. */
11909 start_function (cp_decl_specifier_seq *declspecs,
11910 const cp_declarator *declarator,
11915 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11916 if (decl1 == error_mark_node)
11918 /* If the declarator is not suitable for a function definition,
11919 cause a syntax error. */
11920 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11922 error ("invalid function declaration");
11926 if (DECL_MAIN_P (decl1))
11927 /* main must return int. grokfndecl should have corrected it
11928 (and issued a diagnostic) if the user got it wrong. */
11929 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11930 integer_type_node));
11932 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11937 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11941 use_eh_spec_block (tree fn)
11943 return (flag_exceptions && flag_enforce_eh_specs
11944 && !processing_template_decl
11945 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11946 /* We insert the EH_SPEC_BLOCK only in the original
11947 function; then, it is copied automatically to the
11949 && !DECL_CLONED_FUNCTION_P (fn)
11950 /* Implicitly-generated constructors and destructors have
11951 exception specifications. However, those specifications
11952 are the union of the possible exceptions specified by the
11953 constructors/destructors for bases and members, so no
11954 unallowed exception will ever reach this function. By
11955 not creating the EH_SPEC_BLOCK we save a little memory,
11956 and we avoid spurious warnings about unreachable
11958 && !DECL_ARTIFICIAL (fn));
11961 /* Store the parameter declarations into the current function declaration.
11962 This is called after parsing the parameter declarations, before
11963 digesting the body of the function.
11965 Also install to binding contour return value identifier, if any. */
11968 store_parm_decls (tree current_function_parms)
11970 tree fndecl = current_function_decl;
11973 /* This is a chain of any other decls that came in among the parm
11974 declarations. If a parm is declared with enum {foo, bar} x;
11975 then CONST_DECLs for foo and bar are put here. */
11976 tree nonparms = NULL_TREE;
11978 if (current_function_parms)
11980 /* This case is when the function was defined with an ANSI prototype.
11981 The parms already have decls, so we need not do anything here
11982 except record them as in effect
11983 and complain if any redundant old-style parm decls were written. */
11985 tree specparms = current_function_parms;
11988 /* Must clear this because it might contain TYPE_DECLs declared
11990 current_binding_level->names = NULL;
11992 /* If we're doing semantic analysis, then we'll call pushdecl
11993 for each of these. We must do them in reverse order so that
11994 they end in the correct forward order. */
11995 specparms = nreverse (specparms);
11997 for (parm = specparms; parm; parm = next)
11999 next = TREE_CHAIN (parm);
12000 if (TREE_CODE (parm) == PARM_DECL)
12002 if (DECL_NAME (parm) == NULL_TREE
12003 || TREE_CODE (parm) != VOID_TYPE)
12006 error ("parameter %qD declared void", parm);
12010 /* If we find an enum constant or a type tag,
12011 put it aside for the moment. */
12012 TREE_CHAIN (parm) = NULL_TREE;
12013 nonparms = chainon (nonparms, parm);
12017 /* Get the decls in their original chain order and record in the
12018 function. This is all and only the PARM_DECLs that were
12019 pushed into scope by the loop above. */
12020 DECL_ARGUMENTS (fndecl) = getdecls ();
12023 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12025 /* Now store the final chain of decls for the arguments
12026 as the decl-chain of the current lexical scope.
12027 Put the enumerators in as well, at the front so that
12028 DECL_ARGUMENTS is not modified. */
12029 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12031 if (use_eh_spec_block (current_function_decl))
12032 current_eh_spec_block = begin_eh_spec_block ();
12036 /* We have finished doing semantic analysis on DECL, but have not yet
12037 generated RTL for its body. Save away our current state, so that
12038 when we want to generate RTL later we know what to do. */
12041 save_function_data (tree decl)
12043 struct language_function *f;
12045 /* Save the language-specific per-function data so that we can
12046 get it back when we really expand this function. */
12047 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12050 f = GGC_NEW (struct language_function);
12051 memcpy (f, cp_function_chain, sizeof (struct language_function));
12052 DECL_SAVED_FUNCTION_DATA (decl) = f;
12054 /* Clear out the bits we don't need. */
12055 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12056 f->bindings = NULL;
12057 f->x_local_names = NULL;
12061 /* Set the return value of the constructor (if present). */
12064 finish_constructor_body (void)
12069 if (targetm.cxx.cdtor_returns_this ()
12070 && (! TYPE_FOR_JAVA (current_class_type)))
12072 /* Any return from a constructor will end up here. */
12073 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12075 val = DECL_ARGUMENTS (current_function_decl);
12076 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12077 DECL_RESULT (current_function_decl), val);
12078 /* Return the address of the object. */
12079 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12080 add_stmt (exprstmt);
12084 /* Do all the processing for the beginning of a destructor; set up the
12085 vtable pointers and cleanups for bases and members. */
12088 begin_destructor_body (void)
12090 tree compound_stmt;
12092 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12093 issued an error message. We still want to try to process the
12094 body of the function, but initialize_vtbl_ptrs will crash if
12095 TYPE_BINFO is NULL. */
12096 if (COMPLETE_TYPE_P (current_class_type))
12098 compound_stmt = begin_compound_stmt (0);
12099 /* Make all virtual function table pointers in non-virtual base
12100 classes point to CURRENT_CLASS_TYPE's virtual function
12102 initialize_vtbl_ptrs (current_class_ptr);
12103 finish_compound_stmt (compound_stmt);
12105 /* And insert cleanups for our bases and members so that they
12106 will be properly destroyed if we throw. */
12107 push_base_cleanups ();
12111 /* At the end of every destructor we generate code to delete the object if
12112 necessary. Do that now. */
12115 finish_destructor_body (void)
12119 /* Any return from a destructor will end up here; that way all base
12120 and member cleanups will be run when the function returns. */
12121 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12123 /* In a virtual destructor, we must call delete. */
12124 if (DECL_VIRTUAL_P (current_function_decl))
12127 tree virtual_size = cxx_sizeof (current_class_type);
12131 At the point of definition of a virtual destructor (including
12132 an implicit definition), non-placement operator delete shall
12133 be looked up in the scope of the destructor's class and if
12134 found shall be accessible and unambiguous. */
12135 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12137 /*global_p=*/false,
12138 /*placement=*/NULL_TREE,
12139 /*alloc_fn=*/NULL_TREE);
12141 if_stmt = begin_if_stmt ();
12142 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12143 current_in_charge_parm,
12146 finish_expr_stmt (exprstmt);
12147 finish_then_clause (if_stmt);
12148 finish_if_stmt (if_stmt);
12151 if (targetm.cxx.cdtor_returns_this ())
12155 val = DECL_ARGUMENTS (current_function_decl);
12156 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12157 DECL_RESULT (current_function_decl), val);
12158 /* Return the address of the object. */
12159 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12160 add_stmt (exprstmt);
12164 /* Do the necessary processing for the beginning of a function body, which
12165 in this case includes member-initializers, but not the catch clauses of
12166 a function-try-block. Currently, this means opening a binding level
12167 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12170 begin_function_body (void)
12174 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12177 if (processing_template_decl)
12178 /* Do nothing now. */;
12180 /* Always keep the BLOCK node associated with the outermost pair of
12181 curly braces of a function. These are needed for correct
12182 operation of dwarfout.c. */
12183 keep_next_level (true);
12185 stmt = begin_compound_stmt (BCS_FN_BODY);
12187 if (processing_template_decl)
12188 /* Do nothing now. */;
12189 else if (DECL_DESTRUCTOR_P (current_function_decl))
12190 begin_destructor_body ();
12195 /* Do the processing for the end of a function body. Currently, this means
12196 closing out the cleanups for fully-constructed bases and members, and in
12197 the case of the destructor, deleting the object if desired. Again, this
12198 is only meaningful for [cd]tors, since they are the only functions where
12199 there is a significant distinction between the main body and any
12200 function catch clauses. Handling, say, main() return semantics here
12201 would be wrong, as flowing off the end of a function catch clause for
12202 main() would also need to return 0. */
12205 finish_function_body (tree compstmt)
12207 if (compstmt == NULL_TREE)
12210 /* Close the block. */
12211 finish_compound_stmt (compstmt);
12213 if (processing_template_decl)
12214 /* Do nothing now. */;
12215 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12216 finish_constructor_body ();
12217 else if (DECL_DESTRUCTOR_P (current_function_decl))
12218 finish_destructor_body ();
12221 /* Given a function, returns the BLOCK corresponding to the outermost level
12222 of curly braces, skipping the artificial block created for constructor
12226 outer_curly_brace_block (tree fndecl)
12228 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12229 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12230 /* Skip the artificial function body block. */
12231 block = BLOCK_SUBBLOCKS (block);
12235 /* Finish up a function declaration and compile that function
12236 all the way to assembler language output. The free the storage
12237 for the function definition.
12239 FLAGS is a bitwise or of the following values:
12241 We just finished processing the body of an in-class inline
12242 function definition. (This processing will have taken place
12243 after the class definition is complete.) */
12246 finish_function (int flags)
12248 tree fndecl = current_function_decl;
12249 tree fntype, ctype = NULL_TREE;
12250 int inclass_inline = (flags & 2) != 0;
12253 /* When we get some parse errors, we can end up without a
12254 current_function_decl, so cope. */
12255 if (fndecl == NULL_TREE)
12256 return error_mark_node;
12258 gcc_assert (!defer_mark_used_calls);
12259 defer_mark_used_calls = true;
12261 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12262 && DECL_VIRTUAL_P (fndecl)
12263 && !processing_template_decl)
12265 tree fnclass = DECL_CONTEXT (fndecl);
12266 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12267 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12270 nested = function_depth > 1;
12271 fntype = TREE_TYPE (fndecl);
12273 /* TREE_READONLY (fndecl) = 1;
12274 This caused &foo to be of type ptr-to-const-function
12275 which then got a warning when stored in a ptr-to-function variable. */
12277 gcc_assert (building_stmt_tree ());
12278 /* The current function is being defined, so its DECL_INITIAL should
12279 be set, and unless there's a multiple definition, it should be
12280 error_mark_node. */
12281 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12283 /* For a cloned function, we've already got all the code we need;
12284 there's no need to add any extra bits. */
12285 if (!DECL_CLONED_FUNCTION_P (fndecl))
12287 if (DECL_MAIN_P (current_function_decl))
12291 /* Make it so that `main' always returns 0 by default (or
12294 stmt = finish_return_stmt (integer_one_node);
12296 stmt = finish_return_stmt (integer_zero_node);
12298 /* Hack. We don't want the middle-end to warn that this
12299 return is unreachable, so put the statement on the
12302 location_t linezero = linemap_line_start (line_table, 0, 1);
12303 SET_EXPR_LOCATION (stmt, linezero);
12307 if (use_eh_spec_block (current_function_decl))
12308 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12309 (TREE_TYPE (current_function_decl)),
12310 current_eh_spec_block);
12313 /* If we're saving up tree structure, tie off the function now. */
12314 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12316 finish_fname_decls ();
12318 /* If this function can't throw any exceptions, remember that. */
12319 if (!processing_template_decl
12320 && !cp_function_chain->can_throw
12321 && !flag_non_call_exceptions
12322 && !DECL_REPLACEABLE_P (fndecl))
12323 TREE_NOTHROW (fndecl) = 1;
12325 /* This must come after expand_function_end because cleanups might
12326 have declarations (from inline functions) that need to go into
12327 this function's blocks. */
12329 /* If the current binding level isn't the outermost binding level
12330 for this function, either there is a bug, or we have experienced
12331 syntax errors and the statement tree is malformed. */
12332 if (current_binding_level->kind != sk_function_parms)
12334 /* Make sure we have already experienced errors. */
12335 gcc_assert (errorcount);
12337 /* Throw away the broken statement tree and extra binding
12339 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12341 while (current_binding_level->kind != sk_function_parms)
12343 if (current_binding_level->kind == sk_class)
12344 pop_nested_class ();
12346 poplevel (0, 0, 0);
12349 poplevel (1, 0, 1);
12351 /* Statements should always be full-expressions at the outermost set
12352 of curly braces for a function. */
12353 gcc_assert (stmts_are_full_exprs_p ());
12355 /* Set up the named return value optimization, if we can. Candidate
12356 variables are selected in check_return_expr. */
12357 if (current_function_return_value)
12359 tree r = current_function_return_value;
12362 if (r != error_mark_node
12363 /* This is only worth doing for fns that return in memory--and
12364 simpler, since we don't have to worry about promoted modes. */
12365 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12366 /* Only allow this for variables declared in the outer scope of
12367 the function so we know that their lifetime always ends with a
12368 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12369 we were to do this optimization in tree-ssa. */
12370 && (outer = outer_curly_brace_block (fndecl))
12371 && chain_member (r, BLOCK_VARS (outer)))
12372 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12374 current_function_return_value = NULL_TREE;
12377 /* Remember that we were in class scope. */
12378 if (current_class_name)
12379 ctype = current_class_type;
12381 /* Must mark the RESULT_DECL as being in this function. */
12382 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12384 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12385 to the FUNCTION_DECL node itself. */
12386 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12388 /* Save away current state, if appropriate. */
12389 if (!processing_template_decl)
12390 save_function_data (fndecl);
12392 /* Complain if there's just no return statement. */
12393 if (warn_return_type
12394 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12395 && !dependent_type_p (TREE_TYPE (fntype))
12396 && !current_function_returns_value && !current_function_returns_null
12397 /* Don't complain if we abort or throw. */
12398 && !current_function_returns_abnormally
12399 && !DECL_NAME (DECL_RESULT (fndecl))
12400 && !TREE_NO_WARNING (fndecl)
12401 /* Structor return values (if any) are set by the compiler. */
12402 && !DECL_CONSTRUCTOR_P (fndecl)
12403 && !DECL_DESTRUCTOR_P (fndecl))
12405 warning (OPT_Wreturn_type,
12406 "no return statement in function returning non-void");
12407 TREE_NO_WARNING (fndecl) = 1;
12410 /* Store the end of the function, so that we get good line number
12411 info for the epilogue. */
12412 cfun->function_end_locus = input_location;
12414 /* Genericize before inlining. */
12415 if (!processing_template_decl)
12417 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12418 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12419 cp_genericize (fndecl);
12420 /* Clear out the bits we don't need. */
12421 f->x_current_class_ptr = NULL;
12422 f->x_current_class_ref = NULL;
12423 f->x_eh_spec_block = NULL;
12424 f->x_in_charge_parm = NULL;
12425 f->x_vtt_parm = NULL;
12426 f->x_return_value = NULL;
12427 f->bindings = NULL;
12428 f->extern_decl_map = NULL;
12430 /* Clear out the bits we don't need. */
12431 local_names = NULL;
12433 /* We're leaving the context of this function, so zap cfun. It's still in
12434 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12436 current_function_decl = NULL;
12438 /* If this is an in-class inline definition, we may have to pop the
12439 bindings for the template parameters that we added in
12440 maybe_begin_member_template_processing when start_function was
12442 if (inclass_inline)
12443 maybe_end_member_template_processing ();
12445 /* Leave the scope of the class. */
12447 pop_nested_class ();
12453 /* Let the error reporting routines know that we're outside a
12454 function. For a nested function, this value is used in
12455 cxx_pop_function_context and then reset via pop_function_context. */
12456 current_function_decl = NULL_TREE;
12458 defer_mark_used_calls = false;
12459 if (deferred_mark_used_calls)
12464 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12466 VEC_free (tree, gc, deferred_mark_used_calls);
12472 /* Create the FUNCTION_DECL for a function definition.
12473 DECLSPECS and DECLARATOR are the parts of the declaration;
12474 they describe the return type and the name of the function,
12475 but twisted together in a fashion that parallels the syntax of C.
12477 This function creates a binding context for the function body
12478 as well as setting up the FUNCTION_DECL in current_function_decl.
12480 Returns a FUNCTION_DECL on success.
12482 If the DECLARATOR is not suitable for a function (it defines a datum
12483 instead), we return 0, which tells yyparse to report a parse error.
12485 May return void_type_node indicating that this method is actually
12486 a friend. See grokfield for more details.
12488 Came here with a `.pushlevel' .
12490 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12491 CHANGES TO CODE IN `grokfield'. */
12494 start_method (cp_decl_specifier_seq *declspecs,
12495 const cp_declarator *declarator, tree attrlist)
12497 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12500 if (fndecl == error_mark_node)
12501 return error_mark_node;
12503 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12505 error ("invalid member function declaration");
12506 return error_mark_node;
12510 cplus_decl_attributes (&fndecl, attrlist, 0);
12512 /* Pass friends other than inline friend functions back. */
12513 if (fndecl == void_type_node)
12516 if (DECL_IN_AGGR_P (fndecl))
12518 if (DECL_CONTEXT (fndecl)
12519 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12520 error ("%qD is already defined in class %qT", fndecl,
12521 DECL_CONTEXT (fndecl));
12522 return error_mark_node;
12525 check_template_shadow (fndecl);
12527 DECL_DECLARED_INLINE_P (fndecl) = 1;
12528 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12530 /* We process method specializations in finish_struct_1. */
12531 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12533 fndecl = push_template_decl (fndecl);
12534 if (fndecl == error_mark_node)
12538 if (! DECL_FRIEND_P (fndecl))
12540 if (TREE_CHAIN (fndecl))
12542 fndecl = copy_node (fndecl);
12543 TREE_CHAIN (fndecl) = NULL_TREE;
12547 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12549 /* Make a place for the parms. */
12550 begin_scope (sk_function_parms, fndecl);
12552 DECL_IN_AGGR_P (fndecl) = 1;
12556 /* Go through the motions of finishing a function definition.
12557 We don't compile this method until after the whole class has
12560 FINISH_METHOD must return something that looks as though it
12561 came from GROKFIELD (since we are defining a method, after all).
12563 This is called after parsing the body of the function definition.
12564 STMTS is the chain of statements that makes up the function body.
12566 DECL is the ..._DECL that `start_method' provided. */
12569 finish_method (tree decl)
12571 tree fndecl = decl;
12576 if (decl == void_type_node)
12579 old_initial = DECL_INITIAL (fndecl);
12581 /* Undo the level for the parms (from start_method).
12582 This is like poplevel, but it causes nothing to be
12583 saved. Saving information here confuses symbol-table
12584 output routines. Besides, this information will
12585 be correctly output when this method is actually
12588 /* Clear out the meanings of the local variables of this level;
12589 also record in each decl which block it belongs to. */
12591 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12593 if (DECL_NAME (link) != NULL_TREE)
12594 pop_binding (DECL_NAME (link), link);
12595 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12596 DECL_CONTEXT (link) = NULL_TREE;
12599 poplevel (0, 0, 0);
12601 DECL_INITIAL (fndecl) = old_initial;
12607 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12608 we can lay it out later, when and if its type becomes complete. */
12611 maybe_register_incomplete_var (tree var)
12613 gcc_assert (TREE_CODE (var) == VAR_DECL);
12615 /* Keep track of variables with incomplete types. */
12616 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12617 && DECL_EXTERNAL (var))
12619 tree inner_type = TREE_TYPE (var);
12621 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12622 inner_type = TREE_TYPE (inner_type);
12623 inner_type = TYPE_MAIN_VARIANT (inner_type);
12625 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12626 /* RTTI TD entries are created while defining the type_info. */
12627 || (TYPE_LANG_SPECIFIC (inner_type)
12628 && TYPE_BEING_DEFINED (inner_type)))
12629 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12633 /* Called when a class type (given by TYPE) is defined. If there are
12634 any existing VAR_DECLs whose type has been completed by this
12635 declaration, update them now. */
12638 complete_vars (tree type)
12640 tree *list = &incomplete_vars;
12642 gcc_assert (CLASS_TYPE_P (type));
12645 if (same_type_p (type, TREE_PURPOSE (*list)))
12647 tree var = TREE_VALUE (*list);
12648 tree type = TREE_TYPE (var);
12649 /* Complete the type of the variable. The VAR_DECL itself
12650 will be laid out in expand_expr. */
12651 complete_type (type);
12652 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12653 /* Remove this entry from the list. */
12654 *list = TREE_CHAIN (*list);
12657 list = &TREE_CHAIN (*list);
12660 /* Check for pending declarations which may have abstract type. */
12661 complete_type_check_abstract (type);
12664 /* If DECL is of a type which needs a cleanup, build and return an
12665 expression to perform that cleanup here. Return NULL_TREE if no
12666 cleanup need be done. */
12669 cxx_maybe_build_cleanup (tree decl)
12675 /* Assume no cleanup is required. */
12676 cleanup = NULL_TREE;
12678 if (error_operand_p (decl))
12681 /* Handle "__attribute__((cleanup))". We run the cleanup function
12682 before the destructor since the destructor is what actually
12683 terminates the lifetime of the object. */
12684 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12691 /* Get the name specified by the user for the cleanup function. */
12692 id = TREE_VALUE (TREE_VALUE (attr));
12693 /* Look up the name to find the cleanup function to call. It is
12694 important to use lookup_name here because that is what is
12695 used in c-common.c:handle_cleanup_attribute when performing
12696 initial checks on the attribute. Note that those checks
12697 include ensuring that the function found is not an overloaded
12698 function, or an object with an overloaded call operator,
12699 etc.; we can rely on the fact that the function found is an
12700 ordinary FUNCTION_DECL. */
12701 fn = lookup_name (id);
12702 arg = build_address (decl);
12704 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12706 tf_warning_or_error);
12708 /* Handle ordinary C++ destructors. */
12709 type = TREE_TYPE (decl);
12710 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12712 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12713 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12714 && CLASSTYPE_VBASECLASSES (type));
12718 if (TREE_CODE (type) == ARRAY_TYPE)
12721 addr = build_address (decl);
12723 /* Optimize for space over speed here. */
12724 if (!has_vbases || flag_expensive_optimizations)
12725 flags |= LOOKUP_NONVIRTUAL;
12727 call = build_delete (TREE_TYPE (addr), addr,
12728 sfk_complete_destructor, flags, 0);
12730 cleanup = build_compound_expr (input_location, cleanup, call);
12738 /* When a stmt has been parsed, this function is called. */
12745 /* DECL was originally constructed as a non-static member function,
12746 but turned out to be static. Update it accordingly. */
12749 revert_static_member_fn (tree decl)
12752 tree function = TREE_TYPE (decl);
12753 tree args = TYPE_ARG_TYPES (function);
12755 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12756 != TYPE_UNQUALIFIED)
12757 error ("static member function %q#D declared with type qualifiers", decl);
12759 args = TREE_CHAIN (args);
12760 tmp = build_function_type (TREE_TYPE (function), args);
12761 tmp = build_qualified_type (tmp, cp_type_quals (function));
12762 tmp = build_exception_variant (tmp,
12763 TYPE_RAISES_EXCEPTIONS (function));
12764 TREE_TYPE (decl) = tmp;
12765 if (DECL_ARGUMENTS (decl))
12766 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12767 DECL_STATIC_FUNCTION_P (decl) = 1;
12770 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12771 one of the language-independent trees. */
12773 enum cp_tree_node_structure_enum
12774 cp_tree_node_structure (union lang_tree_node * t)
12776 switch (TREE_CODE (&t->generic))
12778 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12779 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12780 case OVERLOAD: return TS_CP_OVERLOAD;
12781 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12782 case PTRMEM_CST: return TS_CP_PTRMEM;
12783 case BASELINK: return TS_CP_BASELINK;
12784 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12785 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12786 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12787 default: return TS_CP_GENERIC;
12791 /* Build the void_list_node (void_type_node having been created). */
12793 build_void_list_node (void)
12795 tree t = build_tree_list (NULL_TREE, void_type_node);
12800 cp_missing_noreturn_ok_p (tree decl)
12802 /* A missing noreturn is ok for the `main' function. */
12803 return DECL_MAIN_P (decl);
12806 /* Return the COMDAT group into which DECL should be placed. */
12809 cxx_comdat_group (tree decl)
12813 /* Virtual tables, construction virtual tables, and virtual table
12814 tables all go in a single COMDAT group, named after the primary
12816 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12817 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12818 /* For all other DECLs, the COMDAT group is the mangled name of the
12819 declaration itself. */
12822 while (DECL_THUNK_P (decl))
12824 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12825 into the same section as the target function. In that case
12826 we must return target's name. */
12827 tree target = THUNK_TARGET (decl);
12828 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12829 && DECL_SECTION_NAME (target) != NULL
12830 && DECL_ONE_ONLY (target))
12835 name = DECL_ASSEMBLER_NAME (decl);
12841 #include "gt-cp-decl.h"