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);
1893 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1895 /* If the OLDDECL is an instantiation and/or specialization,
1896 then the NEWDECL must be too. But, it may not yet be marked
1897 as such if the caller has created NEWDECL, but has not yet
1898 figured out that it is a redeclaration. */
1899 if (!DECL_USE_TEMPLATE (newdecl))
1900 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1902 /* Don't really know how much of the language-specific
1903 values we should copy from old to new. */
1904 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1905 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1906 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1907 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1909 if (LANG_DECL_HAS_MIN (newdecl))
1911 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1912 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1913 if (DECL_TEMPLATE_INFO (newdecl))
1914 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1915 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1917 /* Only functions have these fields. */
1918 if (TREE_CODE (newdecl) == FUNCTION_DECL
1919 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1921 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1922 olddecl_friend = DECL_FRIEND_P (olddecl);
1923 hidden_friend = (DECL_ANTICIPATED (olddecl)
1924 && DECL_HIDDEN_FRIEND_P (olddecl)
1925 && newdecl_is_friend);
1926 DECL_BEFRIENDING_CLASSES (newdecl)
1927 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1928 DECL_BEFRIENDING_CLASSES (olddecl));
1929 /* DECL_THUNKS is only valid for virtual functions,
1930 otherwise it is a DECL_FRIEND_CONTEXT. */
1931 if (DECL_VIRTUAL_P (newdecl))
1932 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1936 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1940 /* Merge parameter attributes. */
1941 tree oldarg, newarg;
1942 for (oldarg = DECL_ARGUMENTS(olddecl),
1943 newarg = DECL_ARGUMENTS(newdecl);
1945 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1946 DECL_ATTRIBUTES (newarg)
1947 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1948 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1951 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1952 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1954 /* If newdecl is not a specialization, then it is not a
1955 template-related function at all. And that means that we
1956 should have exited above, returning 0. */
1957 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1959 if (DECL_ODR_USED (olddecl))
1960 /* From [temp.expl.spec]:
1962 If a template, a member template or the member of a class
1963 template is explicitly specialized then that
1964 specialization shall be declared before the first use of
1965 that specialization that would cause an implicit
1966 instantiation to take place, in every translation unit in
1967 which such a use occurs. */
1968 error ("explicit specialization of %qD after first use",
1971 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1973 /* Don't propagate visibility from the template to the
1974 specialization here. We'll do that in determine_visibility if
1976 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1978 /* [temp.expl.spec/14] We don't inline explicit specialization
1979 just because the primary template says so. */
1981 else if (new_defines_function && DECL_INITIAL (olddecl))
1983 /* Never inline re-defined extern inline functions.
1984 FIXME: this could be better handled by keeping both
1985 function as separate declarations. */
1986 DECL_UNINLINABLE (newdecl) = 1;
1990 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1991 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1993 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1995 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1996 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1998 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1999 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2000 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2001 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2004 /* Preserve abstractness on cloned [cd]tors. */
2005 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2007 /* Update newdecl's parms to point at olddecl. */
2008 for (parm = DECL_ARGUMENTS (newdecl); parm;
2009 parm = TREE_CHAIN (parm))
2010 DECL_CONTEXT (parm) = olddecl;
2014 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2015 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2016 COPY_DECL_RTL (newdecl, olddecl);
2018 if (! types_match || new_defines_function)
2020 /* These need to be copied so that the names are available.
2021 Note that if the types do match, we'll preserve inline
2022 info and other bits, but if not, we won't. */
2023 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2024 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2026 if (new_defines_function)
2027 /* If defining a function declared with other language
2028 linkage, use the previously declared language linkage. */
2029 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2030 else if (types_match)
2032 /* If redeclaring a builtin function, and not a definition,
2033 it stays built in. */
2034 if (DECL_BUILT_IN (olddecl))
2036 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2037 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2038 /* If we're keeping the built-in definition, keep the rtl,
2039 regardless of declaration matches. */
2040 COPY_DECL_RTL (olddecl, newdecl);
2043 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2044 /* Don't clear out the arguments if we're just redeclaring a
2046 if (DECL_ARGUMENTS (olddecl))
2047 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2050 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2051 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2053 /* Now preserve various other info from the definition. */
2054 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2055 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2056 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2057 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2059 /* Warn about conflicting visibility specifications. */
2060 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2061 && DECL_VISIBILITY_SPECIFIED (newdecl)
2062 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2064 warning_at (input_location, OPT_Wattributes,
2065 "%q+D: visibility attribute ignored because it", newdecl);
2066 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2067 "conflicts with previous declaration here");
2069 /* Choose the declaration which specified visibility. */
2070 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2072 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2073 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2075 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2076 so keep this behavior. */
2077 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2079 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2080 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2083 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2084 with that from NEWDECL below. */
2085 if (DECL_LANG_SPECIFIC (olddecl))
2087 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2088 != DECL_LANG_SPECIFIC (newdecl));
2089 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2092 /* Merge the USED information. */
2093 if (TREE_USED (olddecl))
2094 TREE_USED (newdecl) = 1;
2095 else if (TREE_USED (newdecl))
2096 TREE_USED (olddecl) = 1;
2098 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2102 function_size = sizeof (struct tree_decl_common);
2104 memcpy ((char *) olddecl + sizeof (struct tree_common),
2105 (char *) newdecl + sizeof (struct tree_common),
2106 function_size - sizeof (struct tree_common));
2108 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2109 (char *) newdecl + sizeof (struct tree_decl_common),
2110 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2111 if (new_template_info)
2112 /* If newdecl is a template instantiation, it is possible that
2113 the following sequence of events has occurred:
2115 o A friend function was declared in a class template. The
2116 class template was instantiated.
2118 o The instantiation of the friend declaration was
2119 recorded on the instantiation list, and is newdecl.
2121 o Later, however, instantiate_class_template called pushdecl
2122 on the newdecl to perform name injection. But, pushdecl in
2123 turn called duplicate_decls when it discovered that another
2124 declaration of a global function with the same name already
2127 o Here, in duplicate_decls, we decided to clobber newdecl.
2129 If we're going to do that, we'd better make sure that
2130 olddecl, and not newdecl, is on the list of
2131 instantiations so that if we try to do the instantiation
2132 again we won't get the clobbered declaration. */
2133 reregister_specialization (newdecl,
2139 size_t size = tree_code_size (TREE_CODE (olddecl));
2140 memcpy ((char *) olddecl + sizeof (struct tree_common),
2141 (char *) newdecl + sizeof (struct tree_common),
2142 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2143 switch (TREE_CODE (olddecl))
2153 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2154 (char *) newdecl + sizeof (struct tree_decl_common),
2155 size - sizeof (struct tree_decl_common)
2156 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2160 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2161 (char *) newdecl + sizeof (struct tree_decl_common),
2162 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2163 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2167 DECL_UID (olddecl) = olddecl_uid;
2169 DECL_FRIEND_P (olddecl) = 1;
2172 DECL_ANTICIPATED (olddecl) = 1;
2173 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2176 /* NEWDECL contains the merged attribute lists.
2177 Update OLDDECL to be the same. */
2178 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2180 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2181 so that encode_section_info has a chance to look at the new decl
2182 flags and attributes. */
2183 if (DECL_RTL_SET_P (olddecl)
2184 && (TREE_CODE (olddecl) == FUNCTION_DECL
2185 || (TREE_CODE (olddecl) == VAR_DECL
2186 && TREE_STATIC (olddecl))))
2187 make_decl_rtl (olddecl);
2189 /* The NEWDECL will no longer be needed. Because every out-of-class
2190 declaration of a member results in a call to duplicate_decls,
2191 freeing these nodes represents in a significant savings. */
2197 /* Return zero if the declaration NEWDECL is valid
2198 when the declaration OLDDECL (assumed to be for the same name)
2199 has already been seen.
2200 Otherwise return an error message format string with a %s
2201 where the identifier should go. */
2204 redeclaration_error_message (tree newdecl, tree olddecl)
2206 if (TREE_CODE (newdecl) == TYPE_DECL)
2208 /* Because C++ can put things into name space for free,
2209 constructs like "typedef struct foo { ... } foo"
2210 would look like an erroneous redeclaration. */
2211 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2214 return "redefinition of %q#D";
2216 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2218 /* If this is a pure function, its olddecl will actually be
2219 the original initialization to `0' (which we force to call
2220 abort()). Don't complain about redefinition in this case. */
2221 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2222 && DECL_INITIAL (olddecl) == NULL_TREE)
2225 /* If both functions come from different namespaces, this is not
2226 a redeclaration - this is a conflict with a used function. */
2227 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2228 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2229 && ! decls_match (olddecl, newdecl))
2230 return "%qD conflicts with used function";
2232 /* We'll complain about linkage mismatches in
2233 warn_extern_redeclared_static. */
2235 /* Defining the same name twice is no good. */
2236 if (DECL_INITIAL (olddecl) != NULL_TREE
2237 && DECL_INITIAL (newdecl) != NULL_TREE)
2239 if (DECL_NAME (olddecl) == NULL_TREE)
2240 return "%q#D not declared in class";
2241 else if (!GNU_INLINE_P (olddecl)
2242 || GNU_INLINE_P (newdecl))
2243 return "redefinition of %q#D";
2246 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2248 bool olda = GNU_INLINE_P (olddecl);
2249 bool newa = GNU_INLINE_P (newdecl);
2254 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2256 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2262 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2266 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2268 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2269 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2270 return "redefinition of %q#D";
2274 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2275 || (DECL_TEMPLATE_RESULT (newdecl)
2276 == DECL_TEMPLATE_RESULT (olddecl)))
2279 nt = DECL_TEMPLATE_RESULT (newdecl);
2280 if (DECL_TEMPLATE_INFO (nt))
2281 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2282 ot = DECL_TEMPLATE_RESULT (olddecl);
2283 if (DECL_TEMPLATE_INFO (ot))
2284 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2285 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2286 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2287 return "redefinition of %q#D";
2289 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2291 bool olda = GNU_INLINE_P (ot);
2292 bool newa = GNU_INLINE_P (nt);
2297 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2299 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2303 /* Core issue #226 (C++0x):
2305 If a friend function template declaration specifies a
2306 default template-argument, that declaration shall be a
2307 definition and shall be the only declaration of the
2308 function template in the translation unit. */
2309 if ((cxx_dialect != cxx98)
2310 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2311 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2312 /*is_primary=*/1, /*is_partial=*/0,
2313 /*is_friend_decl=*/2))
2314 return "redeclaration of friend %q#D may not have default template arguments";
2318 else if (TREE_CODE (newdecl) == VAR_DECL
2319 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2320 && (! DECL_LANG_SPECIFIC (olddecl)
2321 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2322 || DECL_THREAD_LOCAL_P (newdecl)))
2324 /* Only variables can be thread-local, and all declarations must
2325 agree on this property. */
2326 if (DECL_THREAD_LOCAL_P (newdecl))
2327 return "thread-local declaration of %q#D follows "
2328 "non-thread-local declaration";
2330 return "non-thread-local declaration of %q#D follows "
2331 "thread-local declaration";
2333 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2335 /* The objects have been declared at namespace scope. If either
2336 is a member of an anonymous union, then this is an invalid
2337 redeclaration. For example:
2343 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2344 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2345 return "redeclaration of %q#D";
2346 /* If at least one declaration is a reference, there is no
2347 conflict. For example:
2353 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2355 /* Reject two definitions. */
2356 return "redefinition of %q#D";
2360 /* Objects declared with block scope: */
2361 /* Reject two definitions, and reject a definition
2362 together with an external reference. */
2363 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2364 return "redeclaration of %q#D";
2369 /* Hash and equality functions for the named_label table. */
2372 named_label_entry_hash (const void *data)
2374 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2375 return DECL_UID (ent->label_decl);
2379 named_label_entry_eq (const void *a, const void *b)
2381 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2382 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2383 return ent_a->label_decl == ent_b->label_decl;
2386 /* Create a new label, named ID. */
2389 make_label_decl (tree id, int local_p)
2391 struct named_label_entry *ent;
2395 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2397 DECL_CONTEXT (decl) = current_function_decl;
2398 DECL_MODE (decl) = VOIDmode;
2399 C_DECLARED_LABEL_FLAG (decl) = local_p;
2401 /* Say where one reference is to the label, for the sake of the
2402 error if it is not defined. */
2403 DECL_SOURCE_LOCATION (decl) = input_location;
2405 /* Record the fact that this identifier is bound to this label. */
2406 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2408 /* Create the label htab for the function on demand. */
2410 named_labels = htab_create_ggc (13, named_label_entry_hash,
2411 named_label_entry_eq, NULL);
2413 /* Record this label on the list of labels used in this function.
2414 We do this before calling make_label_decl so that we get the
2415 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2416 ent = GGC_CNEW (struct named_label_entry);
2417 ent->label_decl = decl;
2419 slot = htab_find_slot (named_labels, ent, INSERT);
2420 gcc_assert (*slot == NULL);
2426 /* Look for a label named ID in the current function. If one cannot
2427 be found, create one. (We keep track of used, but undefined,
2428 labels, and complain about them at the end of a function.) */
2431 lookup_label (tree id)
2435 timevar_push (TV_NAME_LOOKUP);
2436 /* You can't use labels at global scope. */
2437 if (current_function_decl == NULL_TREE)
2439 error ("label %qE referenced outside of any function", id);
2440 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2443 /* See if we've already got this label. */
2444 decl = IDENTIFIER_LABEL_VALUE (id);
2445 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2446 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2448 decl = make_label_decl (id, /*local_p=*/0);
2449 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2452 /* Declare a local label named ID. */
2455 declare_local_label (tree id)
2459 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2460 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2461 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2462 current_binding_level->shadowed_labels);
2463 current_binding_level->shadowed_labels = shadow;
2465 decl = make_label_decl (id, /*local_p=*/1);
2466 TREE_VALUE (shadow) = decl;
2471 /* Returns nonzero if it is ill-formed to jump past the declaration of
2472 DECL. Returns 2 if it's also a real problem. */
2475 decl_jump_unsafe (tree decl)
2477 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2478 with automatic storage duration is not in scope to a point where it is
2479 in scope is ill-formed unless the variable has scalar type, class type
2480 with a trivial default constructor and a trivial destructor, a
2481 cv-qualified version of one of these types, or an array of one of the
2482 preceding types and is declared without an initializer (8.5). */
2483 tree type = TREE_TYPE (decl);
2485 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2486 || type == error_mark_node)
2489 type = strip_array_types (type);
2491 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2492 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2495 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2501 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2504 identify_goto (tree decl, const location_t *locus)
2507 permerror (input_location, "jump to label %qD", decl);
2509 permerror (input_location, "jump to case label");
2511 permerror (*locus, " from here");
2514 /* Check that a single previously seen jump to a newly defined label
2515 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2516 the jump context; NAMES are the names in scope in LEVEL at the jump
2517 context; LOCUS is the source position of the jump or 0. Returns
2518 true if all is well. */
2521 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2522 bool exited_omp, const location_t *locus)
2524 struct cp_binding_level *b;
2525 bool identified = false, saw_eh = false, saw_omp = false;
2529 identify_goto (decl, locus);
2530 error (" exits OpenMP structured block");
2531 identified = saw_omp = true;
2534 for (b = current_binding_level; b ; b = b->level_chain)
2536 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2538 for (new_decls = b->names; new_decls != old_decls;
2539 new_decls = TREE_CHAIN (new_decls))
2541 int problem = decl_jump_unsafe (new_decls);
2547 identify_goto (decl, locus);
2551 error (" crosses initialization of %q+#D", new_decls);
2553 permerror (input_location, " enters scope of %q+#D which has "
2554 "non-trivial destructor", new_decls);
2559 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2563 identify_goto (decl, locus);
2566 if (b->kind == sk_try)
2567 error (" enters try block");
2569 error (" enters catch block");
2572 if (b->kind == sk_omp && !saw_omp)
2576 identify_goto (decl, locus);
2579 error (" enters OpenMP structured block");
2588 check_previous_goto (tree decl, struct named_label_use_entry *use)
2590 check_previous_goto_1 (decl, use->binding_level,
2591 use->names_in_scope, use->in_omp_scope,
2592 &use->o_goto_locus);
2596 check_switch_goto (struct cp_binding_level* level)
2598 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2601 /* Check that a new jump to a label DECL is OK. Called by
2602 finish_goto_stmt. */
2605 check_goto (tree decl)
2607 struct named_label_entry *ent, dummy;
2608 bool saw_catch = false, identified = false;
2611 /* We can't know where a computed goto is jumping.
2612 So we assume that it's OK. */
2613 if (TREE_CODE (decl) != LABEL_DECL)
2616 /* We didn't record any information about this label when we created it,
2617 and there's not much point since it's trivial to analyze as a return. */
2618 if (decl == cdtor_label)
2621 dummy.label_decl = decl;
2622 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2623 gcc_assert (ent != NULL);
2625 /* If the label hasn't been defined yet, defer checking. */
2626 if (! DECL_INITIAL (decl))
2628 struct named_label_use_entry *new_use;
2630 /* Don't bother creating another use if the last goto had the
2631 same data, and will therefore create the same set of errors. */
2633 && ent->uses->names_in_scope == current_binding_level->names)
2636 new_use = GGC_NEW (struct named_label_use_entry);
2637 new_use->binding_level = current_binding_level;
2638 new_use->names_in_scope = current_binding_level->names;
2639 new_use->o_goto_locus = input_location;
2640 new_use->in_omp_scope = false;
2642 new_use->next = ent->uses;
2643 ent->uses = new_use;
2647 if (ent->in_try_scope || ent->in_catch_scope
2648 || ent->in_omp_scope || ent->bad_decls)
2650 permerror (input_location, "jump to label %q+D", decl);
2651 permerror (input_location, " from here");
2655 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2657 tree b = TREE_VALUE (bad);
2658 int u = decl_jump_unsafe (b);
2660 if (u > 1 && DECL_ARTIFICIAL (b))
2662 /* Can't skip init of __exception_info. */
2663 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2667 error (" skips initialization of %q+#D", b);
2669 permerror (input_location, " enters scope of %q+#D which has "
2670 "non-trivial destructor", b);
2673 if (ent->in_try_scope)
2674 error (" enters try block");
2675 else if (ent->in_catch_scope && !saw_catch)
2676 error (" enters catch block");
2678 if (ent->in_omp_scope)
2679 error (" enters OpenMP structured block");
2680 else if (flag_openmp)
2682 struct cp_binding_level *b;
2683 for (b = current_binding_level; b ; b = b->level_chain)
2685 if (b == ent->binding_level)
2687 if (b->kind == sk_omp)
2691 permerror (input_location, "jump to label %q+D", decl);
2692 permerror (input_location, " from here");
2695 error (" exits OpenMP structured block");
2702 /* Check that a return is ok wrt OpenMP structured blocks.
2703 Called by finish_return_stmt. Returns true if all is well. */
2706 check_omp_return (void)
2708 struct cp_binding_level *b;
2709 for (b = current_binding_level; b ; b = b->level_chain)
2710 if (b->kind == sk_omp)
2712 error ("invalid exit from OpenMP structured block");
2718 /* Define a label, specifying the location in the source file.
2719 Return the LABEL_DECL node for the label. */
2722 define_label (location_t location, tree name)
2724 struct named_label_entry *ent, dummy;
2725 struct cp_binding_level *p;
2728 timevar_push (TV_NAME_LOOKUP);
2730 decl = lookup_label (name);
2732 dummy.label_decl = decl;
2733 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2734 gcc_assert (ent != NULL);
2736 /* After labels, make any new cleanups in the function go into their
2737 own new (temporary) binding contour. */
2738 for (p = current_binding_level;
2739 p->kind != sk_function_parms;
2741 p->more_cleanups_ok = 0;
2743 if (name == get_identifier ("wchar_t"))
2744 permerror (input_location, "label named wchar_t");
2746 if (DECL_INITIAL (decl) != NULL_TREE)
2748 error ("duplicate label %qD", decl);
2749 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2753 struct named_label_use_entry *use;
2755 /* Mark label as having been defined. */
2756 DECL_INITIAL (decl) = error_mark_node;
2757 /* Say where in the source. */
2758 DECL_SOURCE_LOCATION (decl) = location;
2760 ent->binding_level = current_binding_level;
2761 ent->names_in_scope = current_binding_level->names;
2763 for (use = ent->uses; use ; use = use->next)
2764 check_previous_goto (decl, use);
2768 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2773 struct cp_binding_level *level;
2774 struct cp_switch *next;
2775 /* The SWITCH_STMT being built. */
2777 /* A splay-tree mapping the low element of a case range to the high
2778 element, or NULL_TREE if there is no high element. Used to
2779 determine whether or not a new case label duplicates an old case
2780 label. We need a tree, rather than simply a hash table, because
2781 of the GNU case range extension. */
2785 /* A stack of the currently active switch statements. The innermost
2786 switch statement is on the top of the stack. There is no need to
2787 mark the stack for garbage collection because it is only active
2788 during the processing of the body of a function, and we never
2789 collect at that point. */
2791 static struct cp_switch *switch_stack;
2793 /* Called right after a switch-statement condition is parsed.
2794 SWITCH_STMT is the switch statement being parsed. */
2797 push_switch (tree switch_stmt)
2799 struct cp_switch *p = XNEW (struct cp_switch);
2800 p->level = current_binding_level;
2801 p->next = switch_stack;
2802 p->switch_stmt = switch_stmt;
2803 p->cases = splay_tree_new (case_compare, NULL, NULL);
2810 struct cp_switch *cs = switch_stack;
2811 location_t switch_location;
2813 /* Emit warnings as needed. */
2814 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2815 switch_location = EXPR_LOCATION (cs->switch_stmt);
2817 switch_location = input_location;
2818 if (!processing_template_decl)
2819 c_do_switch_warnings (cs->cases, switch_location,
2820 SWITCH_STMT_TYPE (cs->switch_stmt),
2821 SWITCH_STMT_COND (cs->switch_stmt));
2823 splay_tree_delete (cs->cases);
2824 switch_stack = switch_stack->next;
2828 /* Note that we've seen a definition of a case label, and complain if this
2829 is a bad place for one. */
2832 finish_case_label (location_t loc, tree low_value, tree high_value)
2835 struct cp_binding_level *p;
2837 if (processing_template_decl)
2841 /* For templates, just add the case label; we'll do semantic
2842 analysis at instantiation-time. */
2843 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2844 return add_stmt (build_case_label (loc, low_value, high_value, label));
2847 /* Find the condition on which this switch statement depends. */
2848 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2849 if (cond && TREE_CODE (cond) == TREE_LIST)
2850 cond = TREE_VALUE (cond);
2852 if (!check_switch_goto (switch_stack->level))
2853 return error_mark_node;
2855 r = c_add_case_label (loc, switch_stack->cases, cond,
2856 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2857 low_value, high_value);
2859 /* After labels, make any new cleanups in the function go into their
2860 own new (temporary) binding contour. */
2861 for (p = current_binding_level;
2862 p->kind != sk_function_parms;
2864 p->more_cleanups_ok = 0;
2869 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2872 typename_hash (const void* k)
2875 const_tree const t = (const_tree) k;
2877 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2878 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2883 typedef struct typename_info {
2891 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2892 really of type `typename_info*' */
2895 typename_compare (const void * k1, const void * k2)
2897 const_tree const t1 = (const_tree) k1;
2898 const typename_info *const t2 = (const typename_info *) k2;
2900 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2901 && TYPE_CONTEXT (t1) == t2->scope
2902 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2903 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2904 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2907 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2908 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2910 Returns the new TYPENAME_TYPE. */
2912 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2915 build_typename_type (tree context, tree name, tree fullname,
2916 enum tag_types tag_type)
2924 if (typename_htab == NULL)
2925 typename_htab = htab_create_ggc (61, &typename_hash,
2926 &typename_compare, NULL);
2928 ti.scope = FROB_CONTEXT (context);
2930 ti.template_id = fullname;
2931 ti.enum_p = tag_type == enum_type;
2932 ti.class_p = (tag_type == class_type
2933 || tag_type == record_type
2934 || tag_type == union_type);
2935 hash = (htab_hash_pointer (ti.scope)
2936 ^ htab_hash_pointer (ti.name));
2938 /* See if we already have this type. */
2939 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2944 /* Build the TYPENAME_TYPE. */
2945 t = cxx_make_type (TYPENAME_TYPE);
2946 TYPE_CONTEXT (t) = ti.scope;
2947 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2948 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2949 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2951 /* Build the corresponding TYPE_DECL. */
2952 d = build_decl (input_location, TYPE_DECL, name, t);
2953 TYPE_NAME (TREE_TYPE (d)) = d;
2954 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2955 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2956 DECL_ARTIFICIAL (d) = 1;
2958 /* Store it in the hash table. */
2961 /* TYPENAME_TYPEs must always be compared structurally, because
2962 they may or may not resolve down to another type depending on
2963 the currently open classes. */
2964 SET_TYPE_STRUCTURAL_EQUALITY (t);
2970 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2971 provided to name the type. Returns an appropriate type, unless an
2972 error occurs, in which case error_mark_node is returned. If we
2973 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2974 return that, rather than the _TYPE it corresponds to, in other
2975 cases we look through the type decl. If TF_ERROR is set, complain
2976 about errors, otherwise be quiet. */
2979 make_typename_type (tree context, tree name, enum tag_types tag_type,
2980 tsubst_flags_t complain)
2986 if (name == error_mark_node
2987 || context == NULL_TREE
2988 || context == error_mark_node)
2989 return error_mark_node;
2993 if (!(TYPE_LANG_SPECIFIC (name)
2994 && (CLASSTYPE_IS_TEMPLATE (name)
2995 || CLASSTYPE_USE_TEMPLATE (name))))
2996 name = TYPE_IDENTIFIER (name);
2998 /* Create a TEMPLATE_ID_EXPR for the type. */
2999 name = build_nt (TEMPLATE_ID_EXPR,
3000 CLASSTYPE_TI_TEMPLATE (name),
3001 CLASSTYPE_TI_ARGS (name));
3003 else if (TREE_CODE (name) == TYPE_DECL)
3004 name = DECL_NAME (name);
3008 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3010 name = TREE_OPERAND (name, 0);
3011 if (TREE_CODE (name) == TEMPLATE_DECL)
3012 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3013 else if (TREE_CODE (name) == OVERLOAD)
3015 error ("%qD is not a type", name);
3016 return error_mark_node;
3019 if (TREE_CODE (name) == TEMPLATE_DECL)
3021 error ("%qD used without template parameters", name);
3022 return error_mark_node;
3024 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3025 gcc_assert (TYPE_P (context));
3027 if (!MAYBE_CLASS_TYPE_P (context))
3029 if (complain & tf_error)
3030 error ("%q#T is not a class", context);
3031 return error_mark_node;
3034 /* When the CONTEXT is a dependent type, NAME could refer to a
3035 dependent base class of CONTEXT. But look inside it anyway
3036 if CONTEXT is a currently open scope, in case it refers to a
3037 member of the current instantiation or a non-dependent base;
3038 lookup will stop when we hit a dependent base. */
3039 if (!dependent_scope_p (context))
3040 /* We should only set WANT_TYPE when we're a nested typename type.
3041 Then we can give better diagnostics if we find a non-type. */
3042 t = lookup_field (context, name, 0, /*want_type=*/true);
3046 if (!t && dependent_type_p (context))
3047 return build_typename_type (context, name, fullname, tag_type);
3049 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3053 if (complain & tf_error)
3054 error (want_template ? "no class template named %q#T in %q#T"
3055 : "no type named %q#T in %q#T", name, context);
3056 return error_mark_node;
3059 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3061 if (complain & tf_error)
3062 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3064 return error_mark_node;
3066 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3068 if (complain & tf_error)
3069 error ("%<typename %T::%D%> names %q#T, which is not a type",
3071 return error_mark_node;
3074 if (complain & tf_error)
3075 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3078 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3080 /*entering_scope=*/0,
3081 tf_warning_or_error | tf_user);
3083 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3089 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3090 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3091 in which case error_mark_node is returned.
3093 If PARM_LIST is non-NULL, also make sure that the template parameter
3094 list of TEMPLATE_DECL matches.
3096 If COMPLAIN zero, don't complain about any errors that occur. */
3099 make_unbound_class_template (tree context, tree name, tree parm_list,
3100 tsubst_flags_t complain)
3106 name = TYPE_IDENTIFIER (name);
3107 else if (DECL_P (name))
3108 name = DECL_NAME (name);
3109 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3111 if (!dependent_type_p (context)
3112 || currently_open_class (context))
3114 tree tmpl = NULL_TREE;
3116 if (MAYBE_CLASS_TYPE_P (context))
3117 tmpl = lookup_field (context, name, 0, false);
3119 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3121 if (complain & tf_error)
3122 error ("no class template named %q#T in %q#T", name, context);
3123 return error_mark_node;
3127 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3129 if (complain & tf_error)
3131 error ("template parameters do not match template");
3132 error ("%q+D declared here", tmpl);
3134 return error_mark_node;
3137 if (complain & tf_error)
3138 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3143 /* Build the UNBOUND_CLASS_TEMPLATE. */
3144 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3145 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3146 TREE_TYPE (t) = NULL_TREE;
3147 SET_TYPE_STRUCTURAL_EQUALITY (t);
3149 /* Build the corresponding TEMPLATE_DECL. */
3150 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3151 TYPE_NAME (TREE_TYPE (d)) = d;
3152 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3153 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3154 DECL_ARTIFICIAL (d) = 1;
3155 DECL_TEMPLATE_PARMS (d) = parm_list;
3162 /* Push the declarations of builtin types into the namespace.
3163 RID_INDEX is the index of the builtin type in the array
3164 RID_POINTERS. NAME is the name used when looking up the builtin
3165 type. TYPE is the _TYPE node for the builtin type. */
3168 record_builtin_type (enum rid rid_index,
3172 tree rname = NULL_TREE, tname = NULL_TREE;
3173 tree tdecl = NULL_TREE;
3175 if ((int) rid_index < (int) RID_MAX)
3176 rname = ridpointers[(int) rid_index];
3178 tname = get_identifier (name);
3180 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3181 eliminated. Built-in types should not be looked up name; their
3182 names are keywords that the parser can recognize. However, there
3183 is code in c-common.c that uses identifier_global_value to look
3184 up built-in types by name. */
3187 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3188 DECL_ARTIFICIAL (tdecl) = 1;
3189 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3195 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3196 DECL_ARTIFICIAL (tdecl) = 1;
3198 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3201 if (!TYPE_NAME (type))
3202 TYPE_NAME (type) = tdecl;
3205 debug_hooks->type_decl (tdecl, 0);
3208 /* Record one of the standard Java types.
3209 * Declare it as having the given NAME.
3210 * If SIZE > 0, it is the size of one of the integral types;
3211 * otherwise it is the negative of the size of one of the other types. */
3214 record_builtin_java_type (const char* name, int size)
3218 type = build_nonstandard_integer_type (size, 0);
3219 else if (size > -32)
3222 /* "__java_char" or ""__java_boolean". */
3223 type = build_nonstandard_integer_type (-size, 1);
3224 /* Get the signed type cached and attached to the unsigned type,
3225 so it doesn't get garbage-collected at "random" times,
3226 causing potential codegen differences out of different UIDs
3227 and different alias set numbers. */
3228 stype = build_nonstandard_integer_type (-size, 0);
3229 TREE_CHAIN (type) = stype;
3230 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3233 { /* "__java_float" or ""__java_double". */
3234 type = make_node (REAL_TYPE);
3235 TYPE_PRECISION (type) = - size;
3238 record_builtin_type (RID_MAX, name, type);
3239 decl = TYPE_NAME (type);
3241 /* Suppress generate debug symbol entries for these types,
3242 since for normal C++ they are just clutter.
3243 However, push_lang_context undoes this if extern "Java" is seen. */
3244 DECL_IGNORED_P (decl) = 1;
3246 TYPE_FOR_JAVA (type) = 1;
3250 /* Push a type into the namespace so that the back ends ignore it. */
3253 record_unknown_type (tree type, const char* name)
3255 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3256 TYPE_DECL, get_identifier (name), type));
3257 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3258 DECL_IGNORED_P (decl) = 1;
3259 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3260 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3261 TYPE_ALIGN (type) = 1;
3262 TYPE_USER_ALIGN (type) = 0;
3263 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3266 /* A string for which we should create an IDENTIFIER_NODE at
3269 typedef struct predefined_identifier
3271 /* The name of the identifier. */
3272 const char *const name;
3273 /* The place where the IDENTIFIER_NODE should be stored. */
3275 /* Nonzero if this is the name of a constructor or destructor. */
3276 const int ctor_or_dtor_p;
3277 } predefined_identifier;
3279 /* Create all the predefined identifiers. */
3282 initialize_predefined_identifiers (void)
3284 const predefined_identifier *pid;
3286 /* A table of identifiers to create at startup. */
3287 static const predefined_identifier predefined_identifiers[] = {
3288 { "C++", &lang_name_cplusplus, 0 },
3289 { "C", &lang_name_c, 0 },
3290 { "Java", &lang_name_java, 0 },
3291 /* Some of these names have a trailing space so that it is
3292 impossible for them to conflict with names written by users. */
3293 { "__ct ", &ctor_identifier, 1 },
3294 { "__base_ctor ", &base_ctor_identifier, 1 },
3295 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3296 { "__dt ", &dtor_identifier, 1 },
3297 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3298 { "__base_dtor ", &base_dtor_identifier, 1 },
3299 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3300 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3301 { "nelts", &nelts_identifier, 0 },
3302 { THIS_NAME, &this_identifier, 0 },
3303 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3304 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3305 { "_vptr", &vptr_identifier, 0 },
3306 { "__vtt_parm", &vtt_parm_identifier, 0 },
3307 { "::", &global_scope_name, 0 },
3308 { "std", &std_identifier, 0 },
3312 for (pid = predefined_identifiers; pid->name; ++pid)
3314 *pid->node = get_identifier (pid->name);
3315 if (pid->ctor_or_dtor_p)
3316 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3320 /* Create the predefined scalar types of C,
3321 and some nodes representing standard constants (0, 1, (void *)0).
3322 Initialize the global binding level.
3323 Make definitions for built-in primitive functions. */
3326 cxx_init_decl_processing (void)
3329 tree void_ftype_ptr;
3331 build_common_tree_nodes (flag_signed_char, false);
3333 /* Create all the identifiers we need. */
3334 initialize_predefined_identifiers ();
3336 /* Create the global variables. */
3337 push_to_top_level ();
3339 current_function_decl = NULL_TREE;
3340 current_binding_level = NULL;
3341 /* Enter the global namespace. */
3342 gcc_assert (global_namespace == NULL_TREE);
3343 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3345 TREE_PUBLIC (global_namespace) = 1;
3346 begin_scope (sk_namespace, global_namespace);
3348 current_lang_name = NULL_TREE;
3350 if (flag_visibility_ms_compat)
3351 default_visibility = VISIBILITY_HIDDEN;
3354 current_lang_name = lang_name_c;
3356 /* Create the `std' namespace. */
3357 push_namespace (std_identifier);
3358 std_node = current_namespace;
3361 c_common_nodes_and_builtins ();
3363 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3364 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3365 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3366 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3367 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3368 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3369 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3370 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3372 integer_two_node = build_int_cst (NULL_TREE, 2);
3373 integer_three_node = build_int_cst (NULL_TREE, 3);
3375 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3376 truthvalue_type_node = boolean_type_node;
3377 truthvalue_false_node = boolean_false_node;
3378 truthvalue_true_node = boolean_true_node;
3380 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3383 record_builtin_type (RID_MAX, NULL, string_type_node);
3386 delta_type_node = ptrdiff_type_node;
3387 vtable_index_type = ptrdiff_type_node;
3389 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3390 void_ftype = build_function_type (void_type_node, void_list_node);
3391 void_ftype_ptr = build_function_type (void_type_node,
3392 tree_cons (NULL_TREE,
3396 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3398 /* C++ extensions */
3400 unknown_type_node = make_node (UNKNOWN_TYPE);
3401 record_unknown_type (unknown_type_node, "unknown type");
3403 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3404 TREE_TYPE (unknown_type_node) = unknown_type_node;
3406 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3408 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3409 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3411 init_list_type_node = make_node (UNKNOWN_TYPE);
3412 record_unknown_type (init_list_type_node, "init list");
3415 /* Make sure we get a unique function type, so we can give
3416 its pointer type a name. (This wins for gdb.) */
3417 tree vfunc_type = make_node (FUNCTION_TYPE);
3418 TREE_TYPE (vfunc_type) = integer_type_node;
3419 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3420 layout_type (vfunc_type);
3422 vtable_entry_type = build_pointer_type (vfunc_type);
3424 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3427 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3428 layout_type (vtbl_type_node);
3429 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3430 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3431 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3432 layout_type (vtbl_ptr_type_node);
3433 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3435 push_namespace (get_identifier ("__cxxabiv1"));
3436 abi_node = current_namespace;
3439 global_type_node = make_node (LANG_TYPE);
3440 record_unknown_type (global_type_node, "global type");
3443 current_lang_name = lang_name_cplusplus;
3447 tree bad_alloc_type_node;
3448 tree bad_alloc_decl;
3449 tree newtype, deltype;
3450 tree ptr_ftype_sizetype;
3452 push_namespace (std_identifier);
3453 bad_alloc_id = get_identifier ("bad_alloc");
3454 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3455 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3457 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3458 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3459 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3463 = build_function_type (ptr_type_node,
3464 tree_cons (NULL_TREE,
3467 newtype = build_exception_variant
3468 (ptr_ftype_sizetype, add_exception_specifier
3469 (NULL_TREE, bad_alloc_type_node, -1));
3470 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3471 push_cp_library_fn (NEW_EXPR, newtype);
3472 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3473 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3474 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3478 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3480 /* Perform other language dependent initializations. */
3481 init_class_processing ();
3482 init_rtti_processing ();
3483 init_template_processing ();
3485 if (flag_exceptions)
3486 init_exception_processing ();
3488 if (! supports_one_only ())
3491 make_fname_decl = cp_make_fname_decl;
3492 start_fname_decls ();
3494 /* Show we use EH for cleanups. */
3495 if (flag_exceptions)
3496 using_eh_for_cleanups ();
3499 /* Generate an initializer for a function naming variable from
3500 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3501 filled in with the type of the init. */
3504 cp_fname_init (const char* name, tree *type_p)
3506 tree domain = NULL_TREE;
3508 tree init = NULL_TREE;
3513 length = strlen (name);
3514 domain = build_index_type (size_int (length));
3515 init = build_string (length + 1, name);
3518 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3519 type = build_cplus_array_type (type, domain);
3524 TREE_TYPE (init) = type;
3526 init = error_mark_node;
3531 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3532 the decl, LOC is the location to give the decl, NAME is the
3533 initialization string and TYPE_DEP indicates whether NAME depended
3534 on the type of the function. We make use of that to detect
3535 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3536 at the point of first use, so we mustn't push the decl now. */
3539 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3541 const char *const name = (type_dep && processing_template_decl
3542 ? NULL : fname_as_string (type_dep));
3544 tree init = cp_fname_init (name, &type);
3545 tree decl = build_decl (loc, VAR_DECL, id, type);
3548 free (CONST_CAST (char *, name));
3550 /* As we're using pushdecl_with_scope, we must set the context. */
3551 DECL_CONTEXT (decl) = current_function_decl;
3552 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3554 TREE_STATIC (decl) = 1;
3555 TREE_READONLY (decl) = 1;
3556 DECL_ARTIFICIAL (decl) = 1;
3558 TREE_USED (decl) = 1;
3560 if (current_function_decl)
3562 struct cp_binding_level *b = current_binding_level;
3563 while (b->level_chain->kind != sk_function_parms)
3565 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3566 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3567 LOOKUP_ONLYCONVERTING);
3570 pushdecl_top_level_and_finish (decl, init);
3576 builtin_function_1 (tree decl, tree context, bool is_global)
3578 tree id = DECL_NAME (decl);
3579 const char *name = IDENTIFIER_POINTER (id);
3581 retrofit_lang_decl (decl);
3583 /* All nesting of C++ functions is lexical; there is never a "static
3584 chain" in the sense of GNU C nested functions. */
3585 DECL_NO_STATIC_CHAIN (decl) = 1;
3587 DECL_ARTIFICIAL (decl) = 1;
3588 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3589 SET_DECL_LANGUAGE (decl, lang_c);
3590 /* Runtime library routines are, by definition, available in an
3591 external shared object. */
3592 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3593 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3595 DECL_CONTEXT (decl) = context;
3598 pushdecl_top_level (decl);
3602 /* A function in the user's namespace should have an explicit
3603 declaration before it is used. Mark the built-in function as
3604 anticipated but not actually declared. */
3605 if (name[0] != '_' || name[1] != '_')
3606 DECL_ANTICIPATED (decl) = 1;
3607 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3609 size_t len = strlen (name);
3611 /* Treat __*_chk fortification functions as anticipated as well,
3612 unless they are __builtin_*. */
3613 if (len > strlen ("___chk")
3614 && memcmp (name + len - strlen ("_chk"),
3615 "_chk", strlen ("_chk") + 1) == 0)
3616 DECL_ANTICIPATED (decl) = 1;
3623 cxx_builtin_function (tree decl)
3625 tree id = DECL_NAME (decl);
3626 const char *name = IDENTIFIER_POINTER (id);
3627 /* All builtins that don't begin with an '_' should additionally
3628 go in the 'std' namespace. */
3631 tree decl2 = copy_node(decl);
3632 push_namespace (std_identifier);
3633 builtin_function_1 (decl2, std_node, false);
3637 return builtin_function_1 (decl, NULL_TREE, false);
3640 /* Like cxx_builtin_function, but guarantee the function is added to the global
3641 scope. This is to allow function specific options to add new machine
3642 dependent builtins when the target ISA changes via attribute((target(...)))
3643 which saves space on program startup if the program does not use non-generic
3647 cxx_builtin_function_ext_scope (tree decl)
3650 tree id = DECL_NAME (decl);
3651 const char *name = IDENTIFIER_POINTER (id);
3652 /* All builtins that don't begin with an '_' should additionally
3653 go in the 'std' namespace. */
3656 tree decl2 = copy_node(decl);
3657 push_namespace (std_identifier);
3658 builtin_function_1 (decl2, std_node, true);
3662 return builtin_function_1 (decl, NULL_TREE, true);
3665 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3666 function. Not called directly. */
3669 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3671 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3672 DECL_EXTERNAL (fn) = 1;
3673 TREE_PUBLIC (fn) = 1;
3674 DECL_ARTIFICIAL (fn) = 1;
3675 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3676 SET_DECL_LANGUAGE (fn, lang_c);
3677 /* Runtime library routines are, by definition, available in an
3678 external shared object. */
3679 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3680 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3684 /* Returns the _DECL for a library function with C linkage.
3685 We assume that such functions never throw; if this is incorrect,
3686 callers should unset TREE_NOTHROW. */
3689 build_library_fn (tree name, tree type)
3691 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3692 TREE_NOTHROW (fn) = 1;
3696 /* Returns the _DECL for a library function with C++ linkage. */
3699 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3701 tree fn = build_library_fn_1 (name, operator_code, type);
3702 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3703 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3704 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3708 /* Like build_library_fn, but takes a C string instead of an
3712 build_library_fn_ptr (const char* name, tree type)
3714 return build_library_fn (get_identifier (name), type);
3717 /* Like build_cp_library_fn, but takes a C string instead of an
3721 build_cp_library_fn_ptr (const char* name, tree type)
3723 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3726 /* Like build_library_fn, but also pushes the function so that we will
3727 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3728 may throw exceptions listed in RAISES. */
3731 push_library_fn (tree name, tree type, tree raises)
3736 type = build_exception_variant (type, raises);
3738 fn = build_library_fn (name, type);
3739 pushdecl_top_level (fn);
3743 /* Like build_cp_library_fn, but also pushes the function so that it
3744 will be found by normal lookup. */
3747 push_cp_library_fn (enum tree_code operator_code, tree type)
3749 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3756 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3760 push_void_library_fn (tree name, tree parmtypes)
3762 tree type = build_function_type (void_type_node, parmtypes);
3763 return push_library_fn (name, type, NULL_TREE);
3766 /* Like push_library_fn, but also note that this function throws
3767 and does not return. Used for __throw_foo and the like. */
3770 push_throw_library_fn (tree name, tree type)
3772 tree fn = push_library_fn (name, type, NULL_TREE);
3773 TREE_THIS_VOLATILE (fn) = 1;
3774 TREE_NOTHROW (fn) = 0;
3778 /* When we call finish_struct for an anonymous union, we create
3779 default copy constructors and such. But, an anonymous union
3780 shouldn't have such things; this function undoes the damage to the
3781 anonymous union type T.
3783 (The reason that we create the synthesized methods is that we don't
3784 distinguish `union { int i; }' from `typedef union { int i; } U'.
3785 The first is an anonymous union; the second is just an ordinary
3789 fixup_anonymous_aggr (tree t)
3793 /* Wipe out memory of synthesized methods. */
3794 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3795 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3796 TYPE_HAS_INIT_REF (t) = 0;
3797 TYPE_HAS_CONST_INIT_REF (t) = 0;
3798 TYPE_HAS_ASSIGN_REF (t) = 0;
3799 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3801 /* Splice the implicitly generated functions out of the TYPE_METHODS
3803 q = &TYPE_METHODS (t);
3806 if (DECL_ARTIFICIAL (*q))
3807 *q = TREE_CHAIN (*q);
3809 q = &TREE_CHAIN (*q);
3812 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3813 if (TYPE_METHODS (t))
3815 tree decl = TYPE_MAIN_DECL (t);
3817 if (TREE_CODE (t) != UNION_TYPE)
3818 error_at (DECL_SOURCE_LOCATION (decl),
3819 "an anonymous struct cannot have function members");
3821 error_at (DECL_SOURCE_LOCATION (decl),
3822 "an anonymous union cannot have function members");
3825 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3826 assignment operators (because they cannot have these methods themselves).
3827 For anonymous unions this is already checked because they are not allowed
3828 in any union, otherwise we have to check it. */
3829 if (TREE_CODE (t) != UNION_TYPE)
3833 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3834 if (TREE_CODE (field) == FIELD_DECL)
3836 type = TREE_TYPE (field);
3837 if (CLASS_TYPE_P (type))
3839 if (TYPE_NEEDS_CONSTRUCTING (type))
3840 error ("member %q+#D with constructor not allowed "
3841 "in anonymous aggregate", field);
3842 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3843 error ("member %q+#D with destructor not allowed "
3844 "in anonymous aggregate", field);
3845 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3846 error ("member %q+#D with copy assignment operator "
3847 "not allowed in anonymous aggregate", field);
3853 /* Make sure that a declaration with no declarator is well-formed, i.e.
3854 just declares a tagged type or anonymous union.
3856 Returns the type declared; or NULL_TREE if none. */
3859 check_tag_decl (cp_decl_specifier_seq *declspecs)
3861 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3862 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3863 /* If a class, struct, or enum type is declared by the DECLSPECS
3864 (i.e, if a class-specifier, enum-specifier, or non-typename
3865 elaborated-type-specifier appears in the DECLSPECS),
3866 DECLARED_TYPE is set to the corresponding type. */
3867 tree declared_type = NULL_TREE;
3868 bool error_p = false;
3870 if (declspecs->multiple_types_p)
3871 error ("multiple types in one declaration");
3872 else if (declspecs->redefined_builtin_type)
3874 if (!in_system_header)
3875 permerror (input_location, "redeclaration of C++ built-in type %qT",
3876 declspecs->redefined_builtin_type);
3881 && TYPE_P (declspecs->type)
3882 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3883 && MAYBE_CLASS_TYPE_P (declspecs->type))
3884 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3885 declared_type = declspecs->type;
3886 else if (declspecs->type == error_mark_node)
3888 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3889 permerror (input_location, "declaration does not declare anything");
3890 /* Check for an anonymous union. */
3891 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3892 && TYPE_ANONYMOUS_P (declared_type))
3894 /* 7/3 In a simple-declaration, the optional init-declarator-list
3895 can be omitted only when declaring a class (clause 9) or
3896 enumeration (7.2), that is, when the decl-specifier-seq contains
3897 either a class-specifier, an elaborated-type-specifier with
3898 a class-key (9.1), or an enum-specifier. In these cases and
3899 whenever a class-specifier or enum-specifier is present in the
3900 decl-specifier-seq, the identifiers in these specifiers are among
3901 the names being declared by the declaration (as class-name,
3902 enum-names, or enumerators, depending on the syntax). In such
3903 cases, and except for the declaration of an unnamed bit-field (9.6),
3904 the decl-specifier-seq shall introduce one or more names into the
3905 program, or shall redeclare a name introduced by a previous
3906 declaration. [Example:
3907 enum { }; // ill-formed
3908 typedef class { }; // ill-formed
3912 error ("missing type-name in typedef-declaration");
3915 /* Anonymous unions are objects, so they can have specifiers. */;
3916 SET_ANON_AGGR_TYPE_P (declared_type);
3918 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3919 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3924 if (declspecs->specs[(int)ds_inline]
3925 || declspecs->specs[(int)ds_virtual])
3926 error ("%qs can only be specified for functions",
3927 declspecs->specs[(int)ds_inline]
3928 ? "inline" : "virtual");
3930 && (!current_class_type
3931 || current_scope () != current_class_type))
3932 error ("%<friend%> can only be specified inside a class");
3933 else if (declspecs->specs[(int)ds_explicit])
3934 error ("%<explicit%> can only be specified for constructors");
3935 else if (declspecs->storage_class)
3936 error ("a storage class can only be specified for objects "
3938 else if (declspecs->specs[(int)ds_const]
3939 || declspecs->specs[(int)ds_volatile]
3940 || declspecs->specs[(int)ds_restrict]
3941 || declspecs->specs[(int)ds_thread])
3942 error ("qualifiers can only be specified for objects "
3944 else if (saw_typedef)
3945 warning (0, "%<typedef%> was ignored in this declaration");
3948 return declared_type;
3951 /* Called when a declaration is seen that contains no names to declare.
3952 If its type is a reference to a structure, union or enum inherited
3953 from a containing scope, shadow that tag name for the current scope
3954 with a forward reference.
3955 If its type defines a new named structure or union
3956 or defines an enum, it is valid but we need not do anything here.
3957 Otherwise, it is an error.
3959 C++: may have to grok the declspecs to learn about static,
3960 complain for anonymous unions.
3962 Returns the TYPE declared -- or NULL_TREE if none. */
3965 shadow_tag (cp_decl_specifier_seq *declspecs)
3967 tree t = check_tag_decl (declspecs);
3972 if (declspecs->attributes)
3974 warning (0, "attribute ignored in declaration of %q+#T", t);
3975 warning (0, "attribute for %q+#T must follow the %qs keyword",
3976 t, class_key_or_enum_as_string (t));
3980 if (maybe_process_partial_specialization (t) == error_mark_node)
3983 /* This is where the variables in an anonymous union are
3984 declared. An anonymous union declaration looks like:
3986 because there is no declarator after the union, the parser
3987 sends that declaration here. */
3988 if (ANON_AGGR_TYPE_P (t))
3990 fixup_anonymous_aggr (t);
3992 if (TYPE_FIELDS (t))
3994 tree decl = grokdeclarator (/*declarator=*/NULL,
3995 declspecs, NORMAL, 0, NULL);
3996 finish_anon_union (decl);
4003 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4006 groktypename (cp_decl_specifier_seq *type_specifiers,
4007 const cp_declarator *declarator,
4008 bool is_template_arg)
4012 enum decl_context context
4013 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4014 attrs = type_specifiers->attributes;
4015 type_specifiers->attributes = NULL_TREE;
4016 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4017 if (attrs && type != error_mark_node)
4019 if (CLASS_TYPE_P (type))
4020 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4021 "outside of definition", type);
4022 else if (MAYBE_CLASS_TYPE_P (type))
4023 /* A template type parameter or other dependent type. */
4024 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4025 "type %qT without an associated declaration", type);
4027 cplus_decl_attributes (&type, attrs, 0);
4032 /* Process a DECLARATOR for a function-scope variable declaration,
4033 namespace-scope variable declaration, or function declaration.
4034 (Function definitions go through start_function; class member
4035 declarations appearing in the body of the class go through
4036 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4037 If an error occurs, the error_mark_node is returned instead.
4039 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4040 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4041 for an explicitly defaulted function, or SD_DELETED for an explicitly
4042 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4043 implicitly initialized via a default constructor. ATTRIBUTES and
4044 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4045 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4046 set, the caller is responsible for calling pop_scope. */
4049 start_decl (const cp_declarator *declarator,
4050 cp_decl_specifier_seq *declspecs,
4053 tree prefix_attributes,
4054 tree *pushed_scope_p)
4062 *pushed_scope_p = NULL_TREE;
4064 /* An object declared as __attribute__((deprecated)) suppresses
4065 warnings of uses of other deprecated items. */
4066 if (lookup_attribute ("deprecated", attributes))
4067 deprecated_state = DEPRECATED_SUPPRESS;
4069 attributes = chainon (attributes, prefix_attributes);
4071 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4074 deprecated_state = DEPRECATED_NORMAL;
4076 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4077 || decl == error_mark_node)
4078 return error_mark_node;
4080 type = TREE_TYPE (decl);
4082 context = DECL_CONTEXT (decl);
4086 *pushed_scope_p = push_scope (context);
4088 /* We are only interested in class contexts, later. */
4089 if (TREE_CODE (context) == NAMESPACE_DECL)
4090 context = NULL_TREE;
4094 /* Is it valid for this decl to have an initializer at all?
4095 If not, set INITIALIZED to zero, which will indirectly
4096 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4097 switch (TREE_CODE (decl))
4100 error ("typedef %qD is initialized (use decltype instead)", decl);
4101 return error_mark_node;
4104 if (initialized == SD_DELETED)
4105 /* We'll handle the rest of the semantics later, but we need to
4106 set this now so it's visible to duplicate_decls. */
4107 DECL_DELETED_FN (decl) = 1;
4116 if (! toplevel_bindings_p ()
4117 && DECL_EXTERNAL (decl))
4118 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4120 DECL_EXTERNAL (decl) = 0;
4121 if (toplevel_bindings_p ())
4122 TREE_STATIC (decl) = 1;
4125 /* If this is a typedef that names the class for linkage purposes
4126 (7.1.3p8), apply any attributes directly to the type. */
4127 if (TREE_CODE (decl) == TYPE_DECL
4128 && TAGGED_TYPE_P (TREE_TYPE (decl))
4129 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4130 flags = ATTR_FLAG_TYPE_IN_PLACE;
4134 /* Set attributes here so if duplicate decl, will have proper attributes. */
4135 cplus_decl_attributes (&decl, attributes, flags);
4137 /* Dllimported symbols cannot be defined. Static data members (which
4138 can be initialized in-class and dllimported) go through grokfield,
4139 not here, so we don't need to exclude those decls when checking for
4141 if (initialized && DECL_DLLIMPORT_P (decl))
4143 error ("definition of %q#D is marked %<dllimport%>", decl);
4144 DECL_DLLIMPORT_P (decl) = 0;
4147 /* If #pragma weak was used, mark the decl weak now. */
4148 maybe_apply_pragma_weak (decl);
4150 if (TREE_CODE (decl) == FUNCTION_DECL
4151 && DECL_DECLARED_INLINE_P (decl)
4152 && DECL_UNINLINABLE (decl)
4153 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4154 warning (0, "inline function %q+D given attribute noinline", decl);
4156 if (context && COMPLETE_TYPE_P (complete_type (context)))
4158 if (TREE_CODE (decl) == VAR_DECL)
4160 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4161 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4162 error ("%q#D is not a static member of %q#T", decl, context);
4165 if (DECL_CONTEXT (field) != context)
4167 if (!same_type_p (DECL_CONTEXT (field), context))
4168 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4169 "to be defined as %<%T::%D%>",
4170 DECL_CONTEXT (field), DECL_NAME (decl),
4171 context, DECL_NAME (decl));
4172 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4174 if (processing_specialization
4175 && template_class_depth (context) == 0
4176 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4177 error ("template header not allowed in member definition "
4178 "of explicitly specialized class");
4179 /* Static data member are tricky; an in-class initialization
4180 still doesn't provide a definition, so the in-class
4181 declaration will have DECL_EXTERNAL set, but will have an
4182 initialization. Thus, duplicate_decls won't warn
4183 about this situation, and so we check here. */
4184 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4185 error ("duplicate initialization of %qD", decl);
4186 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4192 tree field = check_classfn (context, decl,
4193 (processing_template_decl
4194 > template_class_depth (context))
4195 ? current_template_parms
4197 if (field && field != error_mark_node
4198 && duplicate_decls (decl, field,
4199 /*newdecl_is_friend=*/false))
4203 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4204 DECL_IN_AGGR_P (decl) = 0;
4205 /* Do not mark DECL as an explicit specialization if it was not
4206 already marked as an instantiation; a declaration should
4207 never be marked as a specialization unless we know what
4208 template is being specialized. */
4209 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4211 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4213 /* [temp.expl.spec] An explicit specialization of a static data
4214 member of a template is a definition if the declaration
4215 includes an initializer; otherwise, it is a declaration.
4217 We check for processing_specialization so this only applies
4218 to the new specialization syntax. */
4219 if (!initialized && processing_specialization)
4220 DECL_EXTERNAL (decl) = 1;
4223 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4224 permerror (input_location, "declaration of %q#D outside of class is not definition",
4228 was_public = TREE_PUBLIC (decl);
4230 /* Enter this declaration into the symbol table. */
4231 decl = maybe_push_decl (decl);
4233 if (processing_template_decl)
4234 decl = push_template_decl (decl);
4235 if (decl == error_mark_node)
4236 return error_mark_node;
4238 /* Tell the back end to use or not use .common as appropriate. If we say
4239 -fconserve-space, we want this to save .data space, at the expense of
4240 wrong semantics. If we say -fno-conserve-space, we want this to
4241 produce errors about redefs; to do this we force variables into the
4243 if (flag_conserve_space
4244 && TREE_CODE (decl) == VAR_DECL
4245 && TREE_PUBLIC (decl)
4246 && !DECL_THREAD_LOCAL_P (decl)
4247 && !have_global_bss_p ())
4248 DECL_COMMON (decl) = 1;
4250 if (TREE_CODE (decl) == VAR_DECL
4251 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4252 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4254 /* This is a const variable with implicit 'static'. Set
4255 DECL_THIS_STATIC so we can tell it from variables that are
4256 !TREE_PUBLIC because of the anonymous namespace. */
4257 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4258 DECL_THIS_STATIC (decl) = 1;
4261 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4262 start_decl_1 (decl, initialized);
4267 /* Process the declaration of a variable DECL. INITIALIZED is true
4268 iff DECL is explicitly initialized. (INITIALIZED is false if the
4269 variable is initialized via an implicitly-called constructor.)
4270 This function must be called for ordinary variables (including, for
4271 example, implicit instantiations of templates), but must not be
4272 called for template declarations. */
4275 start_decl_1 (tree decl, bool initialized)
4279 bool aggregate_definition_p;
4281 gcc_assert (!processing_template_decl);
4283 if (error_operand_p (decl))
4286 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4288 type = TREE_TYPE (decl);
4289 complete_p = COMPLETE_TYPE_P (type);
4290 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4292 /* If an explicit initializer is present, or if this is a definition
4293 of an aggregate, then we need a complete type at this point.
4294 (Scalars are always complete types, so there is nothing to
4295 check.) This code just sets COMPLETE_P; errors (if necessary)
4296 are issued below. */
4297 if ((initialized || aggregate_definition_p)
4299 && COMPLETE_TYPE_P (complete_type (type)))
4302 /* We will not yet have set TREE_READONLY on DECL if the type
4303 was "const", but incomplete, before this point. But, now, we
4304 have a complete type, so we can try again. */
4305 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4309 /* Is it valid for this decl to have an initializer at all? */
4311 /* Don't allow initializations for incomplete types except for
4312 arrays which might be completed by the initialization. */
4314 ; /* A complete type is ok. */
4315 else if (type_uses_auto (type))
4316 ; /* An auto type is ok. */
4317 else if (TREE_CODE (type) != ARRAY_TYPE)
4319 error ("variable %q#D has initializer but incomplete type", decl);
4320 type = TREE_TYPE (decl) = error_mark_node;
4322 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4324 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4325 error ("elements of array %q#D have incomplete type", decl);
4326 /* else we already gave an error in start_decl. */
4329 else if (aggregate_definition_p && !complete_p)
4331 if (type_uses_auto (type))
4332 error ("declaration of %q#D has no initializer", decl);
4334 error ("aggregate %q#D has incomplete type and cannot be defined",
4336 /* Change the type so that assemble_variable will give
4337 DECL an rtl we can live with: (mem (const_int 0)). */
4338 type = TREE_TYPE (decl) = error_mark_node;
4341 /* Create a new scope to hold this declaration if necessary.
4342 Whether or not a new scope is necessary cannot be determined
4343 until after the type has been completed; if the type is a
4344 specialization of a class template it is not until after
4345 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4346 will be set correctly. */
4347 maybe_push_cleanup_level (type);
4350 /* Handle initialization of references. DECL, TYPE, and INIT have the
4351 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4352 but will be set to a new CLEANUP_STMT if a temporary is created
4353 that must be destroyed subsequently.
4355 Returns an initializer expression to use to initialize DECL, or
4356 NULL if the initialization can be performed statically.
4358 Quotes on semantics can be found in ARM 8.4.3. */
4361 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4365 if (init == NULL_TREE)
4367 if ((DECL_LANG_SPECIFIC (decl) == 0
4368 || DECL_IN_AGGR_P (decl) == 0)
4369 && ! DECL_THIS_EXTERN (decl))
4370 error ("%qD declared as reference but not initialized", decl);
4374 if (TREE_CODE (init) == TREE_LIST)
4375 init = build_x_compound_expr_from_list (init, "initializer");
4377 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4378 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4379 /* Note: default conversion is only called in very special cases. */
4380 init = decay_conversion (init);
4382 /* Convert INIT to the reference type TYPE. This may involve the
4383 creation of a temporary, whose lifetime must be the same as that
4384 of the reference. If so, a DECL_EXPR for the temporary will be
4385 added just after the DECL_EXPR for DECL. That's why we don't set
4386 DECL_INITIAL for local references (instead assigning to them
4387 explicitly); we need to allow the temporary to be initialized
4389 tmp = initialize_reference (type, init, decl, cleanup);
4391 if (tmp == error_mark_node)
4393 else if (tmp == NULL_TREE)
4395 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4399 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4402 DECL_INITIAL (decl) = tmp;
4407 /* Subroutine of check_initializer. We're initializing a DECL of
4408 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4409 extend the lifetime of the underlying array to match that of the decl,
4410 just like for reference initialization. CLEANUP is as for
4411 grok_reference_init. */
4414 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4416 tree aggr_init, array, arrtype;
4417 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4418 if (error_operand_p (init))
4419 return error_mark_node;
4421 aggr_init = TARGET_EXPR_INITIAL (init);
4422 init = build2 (INIT_EXPR, type, decl, init);
4424 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4425 arrtype = TREE_TYPE (array);
4427 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4428 array = TREE_OPERAND (array, 0);
4429 /* If the array is constant, finish_compound_literal already made it a
4430 static variable and we don't need to do anything here. */
4431 if (decl && TREE_CODE (array) == TARGET_EXPR)
4434 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4435 var = build_address (var);
4436 var = convert (arrtype, var);
4437 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4438 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4443 /* Designated initializers in arrays are not supported in GNU C++.
4444 The parser cannot detect this error since it does not know whether
4445 a given brace-enclosed initializer is for a class type or for an
4446 array. This function checks that CE does not use a designated
4447 initializer. If it does, an error is issued. Returns true if CE
4448 is valid, i.e., does not have a designated initializer. */
4451 check_array_designated_initializer (const constructor_elt *ce)
4453 /* Designated initializers for array elements are not supported. */
4456 /* The parser only allows identifiers as designated
4458 if (ce->index == error_mark_node)
4459 error ("name used in a GNU-style designated "
4460 "initializer for an array");
4463 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4464 error ("name %qD used in a GNU-style designated "
4465 "initializer for an array", ce->index);
4473 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4474 array until we finish parsing the initializer. If that's the
4475 situation we're in, update DECL accordingly. */
4478 maybe_deduce_size_from_array_init (tree decl, tree init)
4480 tree type = TREE_TYPE (decl);
4482 if (TREE_CODE (type) == ARRAY_TYPE
4483 && TYPE_DOMAIN (type) == NULL_TREE
4484 && TREE_CODE (decl) != TYPE_DECL)
4486 /* do_default is really a C-ism to deal with tentative definitions.
4487 But let's leave it here to ease the eventual merge. */
4488 int do_default = !DECL_EXTERNAL (decl);
4489 tree initializer = init ? init : DECL_INITIAL (decl);
4492 /* Check that there are no designated initializers in INIT, as
4493 those are not supported in GNU C++, and as the middle-end
4494 will crash if presented with a non-numeric designated
4496 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4498 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4499 constructor_elt *ce;
4502 VEC_iterate (constructor_elt, v, i, ce);
4504 if (!check_array_designated_initializer (ce))
4510 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4514 error ("initializer fails to determine size of %qD", decl);
4515 TREE_TYPE (decl) = error_mark_node;
4517 else if (failure == 2)
4521 error ("array size missing in %qD", decl);
4522 TREE_TYPE (decl) = error_mark_node;
4524 /* If a `static' var's size isn't known, make it extern as
4525 well as static, so it does not get allocated. If it's not
4526 `static', then don't mark it extern; finish_incomplete_decl
4527 will give it a default size and it will get allocated. */
4528 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4529 DECL_EXTERNAL (decl) = 1;
4531 else if (failure == 3)
4533 error ("zero-size array %qD", decl);
4534 TREE_TYPE (decl) = error_mark_node;
4538 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4540 relayout_decl (decl);
4544 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4545 any appropriate error messages regarding the layout. */
4548 layout_var_decl (tree decl)
4552 type = TREE_TYPE (decl);
4553 if (type == error_mark_node)
4556 /* If we haven't already layed out this declaration, do so now.
4557 Note that we must not call complete type for an external object
4558 because it's type might involve templates that we are not
4559 supposed to instantiate yet. (And it's perfectly valid to say
4560 `extern X x' for some incomplete type `X'.) */
4561 if (!DECL_EXTERNAL (decl))
4562 complete_type (type);
4563 if (!DECL_SIZE (decl)
4564 && TREE_TYPE (decl) != error_mark_node
4565 && (COMPLETE_TYPE_P (type)
4566 || (TREE_CODE (type) == ARRAY_TYPE
4567 && !TYPE_DOMAIN (type)
4568 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4569 layout_decl (decl, 0);
4571 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4573 /* An automatic variable with an incomplete type: that is an error.
4574 Don't talk about array types here, since we took care of that
4575 message in grokdeclarator. */
4576 error ("storage size of %qD isn't known", decl);
4577 TREE_TYPE (decl) = error_mark_node;
4580 /* Keep this code around in case we later want to control debug info
4581 based on whether a type is "used". (jason 1999-11-11) */
4583 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4584 /* Let debugger know it should output info for this type. */
4585 note_debug_info_needed (ttype);
4587 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4588 note_debug_info_needed (DECL_CONTEXT (decl));
4591 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4592 && DECL_SIZE (decl) != NULL_TREE
4593 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4595 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4596 constant_expression_warning (DECL_SIZE (decl));
4599 error ("storage size of %qD isn't constant", decl);
4600 TREE_TYPE (decl) = error_mark_node;
4605 /* If a local static variable is declared in an inline function, or if
4606 we have a weak definition, we must endeavor to create only one
4607 instance of the variable at link-time. */
4610 maybe_commonize_var (tree decl)
4612 /* Static data in a function with comdat linkage also has comdat
4614 if (TREE_STATIC (decl)
4615 /* Don't mess with __FUNCTION__. */
4616 && ! DECL_ARTIFICIAL (decl)
4617 && DECL_FUNCTION_SCOPE_P (decl)
4618 /* Unfortunately, import_export_decl has not always been called
4619 before the function is processed, so we cannot simply check
4621 && (DECL_COMDAT (DECL_CONTEXT (decl))
4622 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4623 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4624 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4628 /* With weak symbols, we simply make the variable COMDAT;
4629 that will cause copies in multiple translations units to
4631 comdat_linkage (decl);
4635 if (DECL_INITIAL (decl) == NULL_TREE
4636 || DECL_INITIAL (decl) == error_mark_node)
4638 /* Without weak symbols, we can use COMMON to merge
4639 uninitialized variables. */
4640 TREE_PUBLIC (decl) = 1;
4641 DECL_COMMON (decl) = 1;
4645 /* While for initialized variables, we must use internal
4646 linkage -- which means that multiple copies will not
4648 TREE_PUBLIC (decl) = 0;
4649 DECL_COMMON (decl) = 0;
4650 warning_at (input_location, 0,
4651 "sorry: semantics of inline function static "
4652 "data %q+#D are wrong (you'll wind up "
4653 "with multiple copies)", decl);
4654 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4655 " you can work around this by removing "
4660 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4661 /* Set it up again; we might have set DECL_INITIAL since the last
4663 comdat_linkage (decl);
4666 /* Issue an error message if DECL is an uninitialized const variable. */
4669 check_for_uninitialized_const_var (tree decl)
4671 tree type = TREE_TYPE (decl);
4673 /* ``Unless explicitly declared extern, a const object does not have
4674 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4676 if (TREE_CODE (decl) == VAR_DECL
4677 && TREE_CODE (type) != REFERENCE_TYPE
4678 && CP_TYPE_CONST_P (type)
4679 && !TYPE_NEEDS_CONSTRUCTING (type)
4680 && !DECL_INITIAL (decl))
4681 error ("uninitialized const %qD", decl);
4685 /* Structure holding the current initializer being processed by reshape_init.
4686 CUR is a pointer to the current element being processed, END is a pointer
4687 after the last element present in the initializer. */
4688 typedef struct reshape_iterator_t
4690 constructor_elt *cur;
4691 constructor_elt *end;
4694 static tree reshape_init_r (tree, reshape_iter *, bool);
4696 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4697 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4698 initialized. If there are no more such fields, the return value
4702 next_initializable_field (tree field)
4705 && (TREE_CODE (field) != FIELD_DECL
4706 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4707 || DECL_ARTIFICIAL (field)))
4708 field = TREE_CHAIN (field);
4713 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4714 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4715 INTEGER_CST representing the size of the array minus one (the maximum index),
4716 or NULL_TREE if the array was declared without specifying the size. D is
4717 the iterator within the constructor. */
4720 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4723 bool sized_array_p = (max_index != NULL_TREE);
4724 unsigned HOST_WIDE_INT max_index_cst = 0;
4725 unsigned HOST_WIDE_INT index;
4727 /* The initializer for an array is always a CONSTRUCTOR. */
4728 new_init = build_constructor (init_list_type_node, NULL);
4732 /* Minus 1 is used for zero sized arrays. */
4733 if (integer_all_onesp (max_index))
4736 if (host_integerp (max_index, 1))
4737 max_index_cst = tree_low_cst (max_index, 1);
4738 /* sizetype is sign extended, not zero extended. */
4740 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4744 /* Loop until there are no more initializers. */
4746 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4751 check_array_designated_initializer (d->cur);
4752 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4753 if (elt_init == error_mark_node)
4754 return error_mark_node;
4755 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4761 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4762 Parameters are the same of reshape_init_r. */
4765 reshape_init_array (tree type, reshape_iter *d)
4767 tree max_index = NULL_TREE;
4769 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4771 if (TYPE_DOMAIN (type))
4772 max_index = array_type_nelts (type);
4774 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4777 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4778 Parameters are the same of reshape_init_r. */
4781 reshape_init_vector (tree type, reshape_iter *d)
4783 tree max_index = NULL_TREE;
4786 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4788 if (COMPOUND_LITERAL_P (d->cur->value))
4790 tree value = d->cur->value;
4791 if (!same_type_p (TREE_TYPE (value), type))
4793 error ("invalid type %qT as initializer for a vector of type %qT",
4794 TREE_TYPE (d->cur->value), type);
4795 value = error_mark_node;
4801 /* For a vector, the representation type is a struct
4802 containing a single member which is an array of the
4803 appropriate size. */
4804 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4805 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4806 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4808 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4811 /* Subroutine of reshape_init_r, processes the initializers for classes
4812 or union. Parameters are the same of reshape_init_r. */
4815 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4820 gcc_assert (CLASS_TYPE_P (type));
4822 /* The initializer for a class is always a CONSTRUCTOR. */
4823 new_init = build_constructor (init_list_type_node, NULL);
4824 field = next_initializable_field (TYPE_FIELDS (type));
4830 An initializer for an aggregate member that is an
4831 empty class shall have the form of an empty
4832 initializer-list {}. */
4833 if (!first_initializer_p)
4835 error ("initializer for %qT must be brace-enclosed", type);
4836 return error_mark_node;
4841 /* Loop through the initializable fields, gathering initializers. */
4842 while (d->cur != d->end)
4846 /* Handle designated initializers, as an extension. */
4849 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4851 if (!field || TREE_CODE (field) != FIELD_DECL)
4853 error ("%qT has no non-static data member named %qD", type,
4855 return error_mark_node;
4859 /* If we processed all the member of the class, we are done. */
4863 field_init = reshape_init_r (TREE_TYPE (field), d,
4864 /*first_initializer_p=*/false);
4865 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4869 When a union is initialized with a brace-enclosed
4870 initializer, the braces shall only contain an
4871 initializer for the first member of the union. */
4872 if (TREE_CODE (type) == UNION_TYPE)
4875 field = next_initializable_field (TREE_CHAIN (field));
4881 /* Subroutine of reshape_init, which processes a single initializer (part of
4882 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4883 iterator within the CONSTRUCTOR which points to the initializer to process.
4884 FIRST_INITIALIZER_P is true if this is the first initializer of the
4885 outermost CONSTRUCTOR node. */
4888 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4890 tree init = d->cur->value;
4892 if (error_operand_p (init))
4893 return error_mark_node;
4895 /* A non-aggregate type is always initialized with a single
4897 if (!CP_AGGREGATE_TYPE_P (type))
4899 /* It is invalid to initialize a non-aggregate type with a
4900 brace-enclosed initializer before C++0x.
4901 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4902 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4903 a CONSTRUCTOR (with a record type). */
4904 if (TREE_CODE (init) == CONSTRUCTOR
4905 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4907 if (SCALAR_TYPE_P (type))
4909 error ("braces around scalar initializer for type %qT", type);
4910 init = error_mark_node;
4913 maybe_warn_cpp0x ("extended initializer lists");
4922 All implicit type conversions (clause _conv_) are considered when
4923 initializing the aggregate member with an initializer from an
4924 initializer-list. If the initializer can initialize a member,
4925 the member is initialized. Otherwise, if the member is itself a
4926 non-empty subaggregate, brace elision is assumed and the
4927 initializer is considered for the initialization of the first
4928 member of the subaggregate. */
4929 if (TREE_CODE (init) != CONSTRUCTOR
4930 /* But don't try this for the first initializer, since that would be
4931 looking through the outermost braces; A a2 = { a1 }; is not a
4932 valid aggregate initialization. */
4933 && !first_initializer_p
4934 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4940 /* [dcl.init.string]
4942 A char array (whether plain char, signed char, or unsigned char)
4943 can be initialized by a string-literal (optionally enclosed in
4944 braces); a wchar_t array can be initialized by a wide
4945 string-literal (optionally enclosed in braces). */
4946 if (TREE_CODE (type) == ARRAY_TYPE
4947 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4949 tree str_init = init;
4951 /* Strip one level of braces if and only if they enclose a single
4952 element (as allowed by [dcl.init.string]). */
4953 if (!first_initializer_p
4954 && TREE_CODE (str_init) == CONSTRUCTOR
4955 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4957 str_init = VEC_index (constructor_elt,
4958 CONSTRUCTOR_ELTS (str_init), 0)->value;
4961 /* If it's a string literal, then it's the initializer for the array
4962 as a whole. Otherwise, continue with normal initialization for
4963 array types (one value per array element). */
4964 if (TREE_CODE (str_init) == STRING_CST)
4971 /* The following cases are about aggregates. If we are not within a full
4972 initializer already, and there is not a CONSTRUCTOR, it means that there
4973 is a missing set of braces (that is, we are processing the case for
4974 which reshape_init exists). */
4975 if (!first_initializer_p)
4977 if (TREE_CODE (init) == CONSTRUCTOR)
4979 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4980 /* There is no need to reshape pointer-to-member function
4981 initializers, as they are always constructed correctly
4982 by the front end. */
4984 else if (COMPOUND_LITERAL_P (init))
4985 /* For a nested compound literal, there is no need to reshape since
4986 brace elision is not allowed. Even if we decided to allow it,
4987 we should add a call to reshape_init in finish_compound_literal,
4988 before calling digest_init, so changing this code would still
4989 not be necessary. */
4990 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4994 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4995 return reshape_init (type, init);
4999 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5003 /* Dispatch to specialized routines. */
5004 if (CLASS_TYPE_P (type))
5005 return reshape_init_class (type, d, first_initializer_p);
5006 else if (TREE_CODE (type) == ARRAY_TYPE)
5007 return reshape_init_array (type, d);
5008 else if (TREE_CODE (type) == VECTOR_TYPE)
5009 return reshape_init_vector (type, d);
5014 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5015 brace-enclosed aggregate initializer.
5017 INIT is the CONSTRUCTOR containing the list of initializers describing
5018 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5019 It may not presently match the shape of the TYPE; for example:
5021 struct S { int a; int b; };
5022 struct S a[] = { 1, 2, 3, 4 };
5024 Here INIT will hold a VEC of four elements, rather than a
5025 VEC of two elements, each itself a VEC of two elements. This
5026 routine transforms INIT from the former form into the latter. The
5027 revised CONSTRUCTOR node is returned. */
5030 reshape_init (tree type, tree init)
5032 VEC(constructor_elt, gc) *v;
5036 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5038 v = CONSTRUCTOR_ELTS (init);
5040 /* An empty constructor does not need reshaping, and it is always a valid
5042 if (VEC_empty (constructor_elt, v))
5045 /* Recurse on this CONSTRUCTOR. */
5046 d.cur = VEC_index (constructor_elt, v, 0);
5047 d.end = d.cur + VEC_length (constructor_elt, v);
5049 new_init = reshape_init_r (type, &d, true);
5050 if (new_init == error_mark_node)
5051 return error_mark_node;
5053 /* Make sure all the element of the constructor were used. Otherwise,
5054 issue an error about exceeding initializers. */
5056 error ("too many initializers for %qT", type);
5061 /* Verify array initializer. Returns true if errors have been reported. */
5064 check_array_initializer (tree decl, tree type, tree init)
5066 tree element_type = TREE_TYPE (type);
5068 /* The array type itself need not be complete, because the
5069 initializer may tell us how many elements are in the array.
5070 But, the elements of the array must be complete. */
5071 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5074 error ("elements of array %q#D have incomplete type", decl);
5076 error ("elements of array %q#T have incomplete type", type);
5079 /* It is not valid to initialize a VLA. */
5081 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5082 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5085 error ("variable-sized object %qD may not be initialized", decl);
5087 error ("variable-sized compound literal");
5093 /* Subroutine of check_initializer; args are passed down from that function.
5094 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5097 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5100 int saved_stmts_are_full_exprs_p = 0;
5101 if (building_stmt_tree ())
5103 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5104 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5106 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5107 if (building_stmt_tree ())
5108 current_stmt_tree ()->stmts_are_full_exprs_p =
5109 saved_stmts_are_full_exprs_p;
5113 /* Verify INIT (the initializer for DECL), and record the
5114 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5115 grok_reference_init.
5117 If the return value is non-NULL, it is an expression that must be
5118 evaluated dynamically to initialize DECL. */
5121 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5123 tree type = TREE_TYPE (decl);
5124 tree init_code = NULL;
5126 /* Things that are going to be initialized need to have complete
5128 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5130 if (type == error_mark_node)
5131 /* We will have already complained. */
5134 if (TREE_CODE (type) == ARRAY_TYPE)
5136 if (check_array_initializer (decl, type, init))
5139 else if (!COMPLETE_TYPE_P (type))
5141 error ("%qD has incomplete type", decl);
5142 TREE_TYPE (decl) = error_mark_node;
5146 /* There is no way to make a variable-sized class type in GNU C++. */
5147 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5149 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5151 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5152 if (SCALAR_TYPE_P (type))
5156 maybe_warn_cpp0x ("extended initializer lists");
5157 init = build_zero_init (type, NULL_TREE, false);
5159 else if (init_len != 1)
5161 error ("scalar object %qD requires one element in initializer",
5163 TREE_TYPE (decl) = error_mark_node;
5169 if (TREE_CODE (decl) == CONST_DECL)
5171 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5173 DECL_INITIAL (decl) = init;
5175 gcc_assert (init != NULL_TREE);
5178 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5179 init = grok_reference_init (decl, type, init, cleanup);
5182 /* Do not reshape constructors of vectors (they don't need to be
5184 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5186 if (is_std_init_list (type))
5187 return build_init_list_var_init (decl, type, init, cleanup);
5188 else if (TYPE_NON_AGGREGATE_CLASS (type))
5190 /* Don't reshape if the class has constructors. */
5191 if (cxx_dialect == cxx98)
5192 error ("in C++98 %qD must be initialized by constructor, "
5195 init = build_tree_list (NULL_TREE, init);
5197 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5199 error ("opaque vector types cannot be initialized");
5200 init = error_mark_node;
5203 init = reshape_init (type, init);
5206 /* If DECL has an array type without a specific bound, deduce the
5207 array size from the initializer. */
5208 maybe_deduce_size_from_array_init (decl, init);
5209 type = TREE_TYPE (decl);
5210 if (type == error_mark_node)
5213 if (TYPE_NEEDS_CONSTRUCTING (type)
5214 || (CLASS_TYPE_P (type)
5215 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5216 return build_aggr_init_full_exprs (decl, init, flags);
5217 else if (TREE_CODE (init) != TREE_VEC)
5219 init_code = store_init_value (decl, init, flags);
5220 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5221 && DECL_INITIAL (decl)
5222 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5223 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5224 warning (0, "array %qD initialized by parenthesized string literal %qE",
5225 decl, DECL_INITIAL (decl));
5229 else if (DECL_EXTERNAL (decl))
5231 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5232 return build_aggr_init_full_exprs (decl, init, flags);
5233 else if (MAYBE_CLASS_TYPE_P (type))
5235 tree core_type = strip_array_types (type);
5237 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5238 error ("structure %qD with uninitialized const members", decl);
5239 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5240 error ("structure %qD with uninitialized reference members", decl);
5242 check_for_uninitialized_const_var (decl);
5245 check_for_uninitialized_const_var (decl);
5247 if (init && init != error_mark_node)
5248 init_code = build2 (INIT_EXPR, type, decl, init);
5253 /* If DECL is not a local variable, give it RTL. */
5256 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5258 int toplev = toplevel_bindings_p ();
5260 const char *filename;
5262 /* Set the DECL_ASSEMBLER_NAME for the object. */
5265 /* The `register' keyword, when used together with an
5266 asm-specification, indicates that the variable should be
5267 placed in a particular register. */
5268 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5270 set_user_assembler_name (decl, asmspec);
5271 DECL_HARD_REGISTER (decl) = 1;
5275 if (TREE_CODE (decl) == FUNCTION_DECL
5276 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5277 set_builtin_user_assembler_name (decl, asmspec);
5278 set_user_assembler_name (decl, asmspec);
5282 /* Handle non-variables up front. */
5283 if (TREE_CODE (decl) != VAR_DECL)
5285 rest_of_decl_compilation (decl, toplev, at_eof);
5289 /* If we see a class member here, it should be a static data
5291 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5293 gcc_assert (TREE_STATIC (decl));
5294 /* An in-class declaration of a static data member should be
5295 external; it is only a declaration, and not a definition. */
5296 if (init == NULL_TREE)
5297 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5300 /* We don't create any RTL for local variables. */
5301 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5304 /* We defer emission of local statics until the corresponding
5305 DECL_EXPR is expanded. */
5306 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5308 /* We try to defer namespace-scope static constants so that they are
5309 not emitted into the object file unnecessarily. */
5310 filename = input_filename;
5311 if (!DECL_VIRTUAL_P (decl)
5312 && TREE_READONLY (decl)
5313 && DECL_INITIAL (decl) != NULL_TREE
5314 && DECL_INITIAL (decl) != error_mark_node
5316 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5318 && !TREE_PUBLIC (decl))
5320 /* Fool with the linkage of static consts according to #pragma
5322 struct c_fileinfo *finfo = get_fileinfo (filename);
5323 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5325 TREE_PUBLIC (decl) = 1;
5326 DECL_EXTERNAL (decl) = finfo->interface_only;
5331 /* Likewise for template instantiations. */
5332 else if (DECL_LANG_SPECIFIC (decl)
5333 && DECL_IMPLICIT_INSTANTIATION (decl))
5336 /* If we're not deferring, go ahead and assemble the variable. */
5338 rest_of_decl_compilation (decl, toplev, at_eof);
5341 /* walk_tree helper for wrap_temporary_cleanups, below. */
5344 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5346 if (TYPE_P (*stmt_p))
5352 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5354 tree guard = (tree)data;
5355 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5357 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5358 /* Tell honor_protect_cleanup_actions to handle this as a separate
5360 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5362 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5368 /* We're initializing a local variable which has a cleanup GUARD. If there
5369 are any temporaries used in the initializer INIT of this variable, we
5370 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5371 variable will be cleaned up properly if one of them throws.
5373 Unfortunately, there's no way to express this properly in terms of
5374 nesting, as the regions for the temporaries overlap the region for the
5375 variable itself; if there are two temporaries, the variable needs to be
5376 the first thing destroyed if either of them throws. However, we only
5377 want to run the variable's cleanup if it actually got constructed. So
5378 we need to guard the temporary cleanups with the variable's cleanup if
5379 they are run on the normal path, but not if they are run on the
5380 exceptional path. We implement this by telling
5381 honor_protect_cleanup_actions to strip the variable cleanup from the
5382 exceptional path. */
5385 wrap_temporary_cleanups (tree init, tree guard)
5387 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5390 /* Generate code to initialize DECL (a local variable). */
5393 initialize_local_var (tree decl, tree init)
5395 tree type = TREE_TYPE (decl);
5399 gcc_assert (TREE_CODE (decl) == VAR_DECL
5400 || TREE_CODE (decl) == RESULT_DECL);
5401 gcc_assert (!TREE_STATIC (decl));
5403 if (DECL_SIZE (decl) == NULL_TREE)
5405 /* If we used it already as memory, it must stay in memory. */
5406 DECL_INITIAL (decl) = NULL_TREE;
5407 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5411 if (type == error_mark_node)
5414 /* Compute and store the initial value. */
5415 already_used = TREE_USED (decl) || TREE_USED (type);
5417 /* Generate a cleanup, if necessary. */
5418 cleanup = cxx_maybe_build_cleanup (decl);
5420 /* Perform the initialization. */
5423 int saved_stmts_are_full_exprs_p;
5425 /* If we're only initializing a single object, guard the destructors
5426 of any temporaries used in its initializer with its destructor.
5427 This isn't right for arrays because each element initialization is
5428 a full-expression. */
5429 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5430 wrap_temporary_cleanups (init, cleanup);
5432 gcc_assert (building_stmt_tree ());
5433 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5434 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5435 finish_expr_stmt (init);
5436 current_stmt_tree ()->stmts_are_full_exprs_p =
5437 saved_stmts_are_full_exprs_p;
5440 /* Set this to 0 so we can tell whether an aggregate which was
5441 initialized was ever used. Don't do this if it has a
5442 destructor, so we don't complain about the 'resource
5443 allocation is initialization' idiom. Now set
5444 attribute((unused)) on types so decls of that type will be
5445 marked used. (see TREE_USED, above.) */
5446 if (TYPE_NEEDS_CONSTRUCTING (type)
5448 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5449 && DECL_NAME (decl))
5450 TREE_USED (decl) = 0;
5451 else if (already_used)
5452 TREE_USED (decl) = 1;
5455 finish_decl_cleanup (decl, cleanup);
5458 /* DECL is a VAR_DECL for a compiler-generated variable with static
5459 storage duration (like a virtual table) whose initializer is a
5460 compile-time constant. INIT must be either a TREE_LIST of values,
5461 or a CONSTRUCTOR. Initialize the variable and provide it to the
5465 initialize_artificial_var (tree decl, tree init)
5467 gcc_assert (DECL_ARTIFICIAL (decl));
5468 if (TREE_CODE (init) == TREE_LIST)
5469 init = build_constructor_from_list (TREE_TYPE (decl), init);
5470 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5471 DECL_INITIAL (decl) = init;
5472 DECL_INITIALIZED_P (decl) = 1;
5473 determine_visibility (decl);
5474 layout_var_decl (decl);
5475 maybe_commonize_var (decl);
5476 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5479 /* INIT is the initializer for a variable, as represented by the
5480 parser. Returns true iff INIT is value-dependent. */
5483 value_dependent_init_p (tree init)
5485 if (TREE_CODE (init) == TREE_LIST)
5486 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5487 return any_value_dependent_elements_p (init);
5488 else if (TREE_CODE (init) == CONSTRUCTOR)
5489 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5491 VEC(constructor_elt, gc) *elts;
5495 elts = CONSTRUCTOR_ELTS (init);
5496 nelts = VEC_length (constructor_elt, elts);
5497 for (i = 0; i < nelts; ++i)
5498 if (value_dependent_init_p (VEC_index (constructor_elt,
5503 /* It must be a simple expression, e.g., int i = 3; */
5504 return value_dependent_expression_p (init);
5509 /* Finish processing of a declaration;
5510 install its line number and initial value.
5511 If the length of an array type is not known before,
5512 it must be determined now, from the initial value, or it is an error.
5514 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5515 true, then INIT is an integral constant expression.
5517 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5518 if the (init) syntax was used. */
5521 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5522 tree asmspec_tree, int flags)
5526 const char *asmspec = NULL;
5527 int was_readonly = 0;
5528 bool var_definition_p = false;
5529 int saved_processing_template_decl;
5532 if (decl == error_mark_node)
5537 error ("assignment (not initialization) in declaration");
5541 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5542 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5543 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5545 type = TREE_TYPE (decl);
5546 if (type == error_mark_node)
5549 /* Assume no cleanup is required. */
5550 cleanup = NULL_TREE;
5551 saved_processing_template_decl = processing_template_decl;
5553 /* If a name was specified, get the string. */
5554 if (global_scope_p (current_binding_level))
5555 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5556 if (asmspec_tree && asmspec_tree != error_mark_node)
5557 asmspec = TREE_STRING_POINTER (asmspec_tree);
5559 if (current_class_type
5560 && CP_DECL_CONTEXT (decl) == current_class_type
5561 && TYPE_BEING_DEFINED (current_class_type)
5562 && (DECL_INITIAL (decl) || init))
5563 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5565 auto_node = type_uses_auto (type);
5568 if (init == NULL_TREE)
5570 error ("declaration of %q#D has no initializer", decl);
5571 TREE_TYPE (decl) = error_mark_node;
5574 if (TREE_CODE (init) == TREE_LIST)
5575 init = build_x_compound_expr_from_list (init, "initializer");
5576 if (describable_type (init))
5578 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5579 if (type == error_mark_node)
5584 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5586 if (init == ridpointers[(int)RID_DELETE])
5588 /* FIXME check this is 1st decl. */
5589 DECL_DELETED_FN (decl) = 1;
5590 DECL_DECLARED_INLINE_P (decl) = 1;
5591 DECL_INITIAL (decl) = error_mark_node;
5594 else if (init == ridpointers[(int)RID_DEFAULT])
5596 if (!defaultable_fn_p (decl))
5598 error ("%qD cannot be defaulted", decl);
5599 DECL_INITIAL (decl) = NULL_TREE;
5602 DECL_DEFAULTED_FN (decl) = 1;
5606 if (processing_template_decl)
5608 bool type_dependent_p;
5610 /* Add this declaration to the statement-tree. */
5611 if (at_function_scope_p ())
5612 add_decl_expr (decl);
5614 type_dependent_p = dependent_type_p (type);
5616 if (check_for_bare_parameter_packs (init))
5619 DECL_INITIAL (decl) = NULL_TREE;
5622 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5624 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5625 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5626 TREE_CONSTANT (decl) = 1;
5629 /* Generally, initializers in templates are expanded when the
5630 template is instantiated. But, if DECL is an integral
5631 constant static data member, then it can be used in future
5632 integral constant expressions, and its value must be
5635 && DECL_CLASS_SCOPE_P (decl)
5636 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5637 && !type_dependent_p
5638 && !value_dependent_init_p (init)))
5641 DECL_INITIAL (decl) = init;
5642 if (TREE_CODE (decl) == VAR_DECL
5643 && !DECL_PRETTY_FUNCTION_P (decl)
5644 && !type_dependent_p)
5645 maybe_deduce_size_from_array_init (decl, init);
5649 if (TREE_CODE (init) == TREE_LIST)
5651 /* If the parenthesized-initializer form was used (e.g.,
5652 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5653 arguments. (There is generally only one.) We convert them
5656 for (; list; list = TREE_CHAIN (list))
5658 tree elt = TREE_VALUE (list);
5659 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5663 init = fold_non_dependent_expr (init);
5664 processing_template_decl = 0;
5667 /* Take care of TYPE_DECLs up front. */
5668 if (TREE_CODE (decl) == TYPE_DECL)
5670 if (type != error_mark_node
5671 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5673 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5674 warning (0, "shadowing previous type declaration of %q#D", decl);
5675 set_identifier_type_value (DECL_NAME (decl), decl);
5678 /* If we have installed this as the canonical typedef for this
5679 type, and that type has not been defined yet, delay emitting
5680 the debug information for it, as we will emit it later. */
5681 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5682 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5683 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5685 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5690 /* A reference will be modified here, as it is initialized. */
5691 if (! DECL_EXTERNAL (decl)
5692 && TREE_READONLY (decl)
5693 && TREE_CODE (type) == REFERENCE_TYPE)
5696 TREE_READONLY (decl) = 0;
5699 if (TREE_CODE (decl) == VAR_DECL)
5701 /* Only variables with trivial initialization and destruction can
5702 have thread-local storage. */
5703 if (DECL_THREAD_LOCAL_P (decl)
5704 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5705 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5706 error ("%qD cannot be thread-local because it has non-trivial "
5707 "type %qT", decl, TREE_TYPE (decl));
5708 /* If this is a local variable that will need a mangled name,
5709 register it now. We must do this before processing the
5710 initializer for the variable, since the initialization might
5711 require a guard variable, and since the mangled name of the
5712 guard variable will depend on the mangled name of this
5714 if (DECL_FUNCTION_SCOPE_P (decl)
5715 && TREE_STATIC (decl)
5716 && !DECL_ARTIFICIAL (decl))
5717 push_local_name (decl);
5718 /* Convert the initializer to the type of DECL, if we have not
5719 already initialized DECL. */
5720 if (!DECL_INITIALIZED_P (decl)
5721 /* If !DECL_EXTERNAL then DECL is being defined. In the
5722 case of a static data member initialized inside the
5723 class-specifier, there can be an initializer even if DECL
5724 is *not* defined. */
5725 && (!DECL_EXTERNAL (decl) || init))
5727 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5730 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5731 /* Allow libjava/prims.cc define primitive classes. */
5732 if (init != NULL_TREE
5733 || jclass == NULL_TREE
5734 || TREE_CODE (jclass) != TYPE_DECL
5735 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5736 || !same_type_ignoring_top_level_qualifiers_p
5737 (type, TREE_TYPE (TREE_TYPE (jclass))))
5738 error ("Java object %qD not allocated with %<new%>", decl);
5743 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5744 if (init_const_expr_p)
5746 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5747 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5748 TREE_CONSTANT (decl) = 1;
5751 init = check_initializer (decl, init, flags, &cleanup);
5752 /* Thread-local storage cannot be dynamically initialized. */
5753 if (DECL_THREAD_LOCAL_P (decl) && init)
5755 error ("%qD is thread-local and so cannot be dynamically "
5756 "initialized", decl);
5760 /* Check that the initializer for a static data member was a
5761 constant. Although we check in the parser that the
5762 initializer is an integral constant expression, we do not
5763 simplify division-by-zero at the point at which it
5764 occurs. Therefore, in:
5766 struct S { static const int i = 7 / 0; };
5768 we issue an error at this point. It would
5769 probably be better to forbid division by zero in
5770 integral constant expressions. */
5771 if (DECL_EXTERNAL (decl) && init)
5773 error ("%qD cannot be initialized by a non-constant expression"
5774 " when being declared", decl);
5775 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5783 The memory occupied by any object of static storage
5784 duration is zero-initialized at program startup before
5785 any other initialization takes place.
5787 We cannot create an appropriate initializer until after
5788 the type of DECL is finalized. If DECL_INITIAL is set,
5789 then the DECL is statically initialized, and any
5790 necessary zero-initialization has already been performed. */
5791 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5792 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5793 /*nelts=*/NULL_TREE,
5794 /*static_storage_p=*/true);
5795 /* Remember that the initialization for this variable has
5797 DECL_INITIALIZED_P (decl) = 1;
5798 /* This declaration is the definition of this variable,
5799 unless we are initializing a static data member within
5800 the class specifier. */
5801 if (!DECL_EXTERNAL (decl))
5802 var_definition_p = true;
5804 /* If the variable has an array type, lay out the type, even if
5805 there is no initializer. It is valid to index through the
5806 array, and we must get TYPE_ALIGN set correctly on the array
5808 else if (TREE_CODE (type) == ARRAY_TYPE)
5811 else if (TREE_CODE (decl) == FIELD_DECL
5812 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5813 error ("non-static data member %qD has Java class type", decl);
5815 /* Add this declaration to the statement-tree. This needs to happen
5816 after the call to check_initializer so that the DECL_EXPR for a
5817 reference temp is added before the DECL_EXPR for the reference itself. */
5818 if (at_function_scope_p ())
5819 add_decl_expr (decl);
5821 /* Let the middle end know about variables and functions -- but not
5822 static data members in uninstantiated class templates. */
5823 if (!saved_processing_template_decl
5824 && (TREE_CODE (decl) == VAR_DECL
5825 || TREE_CODE (decl) == FUNCTION_DECL))
5827 if (TREE_CODE (decl) == VAR_DECL)
5829 layout_var_decl (decl);
5830 maybe_commonize_var (decl);
5833 /* This needs to happen after the linkage is set. */
5834 determine_visibility (decl);
5836 if (var_definition_p && TREE_STATIC (decl))
5838 /* If a TREE_READONLY variable needs initialization
5839 at runtime, it is no longer readonly and we need to
5840 avoid MEM_READONLY_P being set on RTL created for it. */
5843 if (TREE_READONLY (decl))
5844 TREE_READONLY (decl) = 0;
5847 else if (was_readonly)
5848 TREE_READONLY (decl) = 1;
5851 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5853 /* Check for abstractness of the type. Notice that there is no
5854 need to strip array types here since the check for those types
5855 is already done within create_array_type_for_decl. */
5856 if (TREE_CODE (type) == FUNCTION_TYPE
5857 || TREE_CODE (type) == METHOD_TYPE)
5858 abstract_virtuals_error (decl, TREE_TYPE (type));
5860 abstract_virtuals_error (decl, type);
5862 if (TREE_TYPE (decl) == error_mark_node)
5863 /* No initialization required. */
5865 else if (TREE_CODE (decl) == FUNCTION_DECL)
5869 if (init == ridpointers[(int)RID_DEFAULT])
5871 /* An out-of-class default definition is defined at
5872 the point where it is explicitly defaulted. */
5873 if (DECL_INITIAL (decl) == error_mark_node)
5874 synthesize_method (decl);
5877 error ("function %q#D is initialized like a variable", decl);
5879 /* else no initialization required. */
5881 else if (DECL_EXTERNAL (decl)
5882 && ! (DECL_LANG_SPECIFIC (decl)
5883 && DECL_NOT_REALLY_EXTERN (decl)))
5886 DECL_INITIAL (decl) = init;
5888 /* A variable definition. */
5889 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5890 /* Initialize the local variable. */
5891 initialize_local_var (decl, init);
5893 /* If a variable is defined, and then a subsequent
5894 definition with external linkage is encountered, we will
5895 get here twice for the same variable. We want to avoid
5896 calling expand_static_init more than once. For variables
5897 that are not static data members, we can call
5898 expand_static_init only when we actually process the
5899 initializer. It is not legal to redeclare a static data
5900 member, so this issue does not arise in that case. */
5901 else if (var_definition_p && TREE_STATIC (decl))
5902 expand_static_init (decl, init);
5905 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5906 reference, insert it in the statement-tree now. */
5908 push_cleanup (decl, cleanup, false);
5911 processing_template_decl = saved_processing_template_decl;
5914 TREE_READONLY (decl) = 1;
5916 /* If this was marked 'used', be sure it will be output. */
5917 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5918 mark_decl_referenced (decl);
5921 /* Returns a declaration for a VAR_DECL as if:
5923 extern "C" TYPE NAME;
5925 had been seen. Used to create compiler-generated global
5929 declare_global_var (tree name, tree type)
5933 push_to_top_level ();
5934 decl = build_decl (input_location, VAR_DECL, name, type);
5935 TREE_PUBLIC (decl) = 1;
5936 DECL_EXTERNAL (decl) = 1;
5937 DECL_ARTIFICIAL (decl) = 1;
5938 /* If the user has explicitly declared this variable (perhaps
5939 because the code we are compiling is part of a low-level runtime
5940 library), then it is possible that our declaration will be merged
5941 with theirs by pushdecl. */
5942 decl = pushdecl (decl);
5943 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5944 pop_from_top_level ();
5949 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5950 if "__cxa_atexit" is not being used) corresponding to the function
5951 to be called when the program exits. */
5954 get_atexit_fn_ptr_type (void)
5959 if (!atexit_fn_ptr_type_node)
5961 if (flag_use_cxa_atexit
5962 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5963 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5964 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5966 /* The parameter to "atexit" is "void (*)(void)". */
5967 arg_types = void_list_node;
5969 fn_type = build_function_type (void_type_node, arg_types);
5970 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5973 return atexit_fn_ptr_type_node;
5976 /* Returns a pointer to the `atexit' function. Note that if
5977 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5978 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5981 get_atexit_node (void)
5988 bool use_aeabi_atexit;
5993 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5995 /* The declaration for `__cxa_atexit' is:
5997 int __cxa_atexit (void (*)(void *), void *, void *)
5999 We build up the argument types and then then function type
6002 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6003 /* First, build the pointer-to-function type for the first
6005 fn_ptr_type = get_atexit_fn_ptr_type ();
6006 /* Then, build the rest of the argument types. */
6007 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6008 if (use_aeabi_atexit)
6010 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6011 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6015 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6016 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6018 /* And the final __cxa_atexit type. */
6019 fn_type = build_function_type (integer_type_node, arg_types);
6020 fn_ptr_type = build_pointer_type (fn_type);
6021 if (use_aeabi_atexit)
6022 name = "__aeabi_atexit";
6024 name = "__cxa_atexit";
6028 /* The declaration for `atexit' is:
6030 int atexit (void (*)());
6032 We build up the argument types and then then function type
6034 fn_ptr_type = get_atexit_fn_ptr_type ();
6035 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6036 /* Build the final atexit type. */
6037 fn_type = build_function_type (integer_type_node, arg_types);
6041 /* Now, build the function declaration. */
6042 push_lang_context (lang_name_c);
6043 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6044 mark_used (atexit_fndecl);
6045 pop_lang_context ();
6046 atexit_node = decay_conversion (atexit_fndecl);
6051 /* Returns the __dso_handle VAR_DECL. */
6054 get_dso_handle_node (void)
6056 if (dso_handle_node)
6057 return dso_handle_node;
6059 /* Declare the variable. */
6060 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6063 return dso_handle_node;
6066 /* Begin a new function with internal linkage whose job will be simply
6067 to destroy some particular variable. */
6069 static GTY(()) int start_cleanup_cnt;
6072 start_cleanup_fn (void)
6077 bool use_cxa_atexit = flag_use_cxa_atexit
6078 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6080 push_to_top_level ();
6082 /* No need to mangle this. */
6083 push_lang_context (lang_name_c);
6085 /* Build the name of the function. */
6086 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6087 /* Build the function declaration. */
6088 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6089 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6090 /* It's a function with internal linkage, generated by the
6092 TREE_PUBLIC (fndecl) = 0;
6093 DECL_ARTIFICIAL (fndecl) = 1;
6094 /* Make the function `inline' so that it is only emitted if it is
6095 actually needed. It is unlikely that it will be inlined, since
6096 it is only called via a function pointer, but we avoid unnecessary
6097 emissions this way. */
6098 DECL_DECLARED_INLINE_P (fndecl) = 1;
6099 DECL_INTERFACE_KNOWN (fndecl) = 1;
6100 /* Build the parameter. */
6105 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6106 DECL_CONTEXT (parmdecl) = fndecl;
6107 TREE_USED (parmdecl) = 1;
6108 DECL_ARGUMENTS (fndecl) = parmdecl;
6112 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6114 pop_lang_context ();
6116 return current_function_decl;
6119 /* Finish the cleanup function begun by start_cleanup_fn. */
6122 end_cleanup_fn (void)
6124 expand_or_defer_fn (finish_function (0));
6126 pop_from_top_level ();
6129 /* Generate code to handle the destruction of DECL, an object with
6130 static storage duration. */
6133 register_dtor_fn (tree decl)
6142 type = TREE_TYPE (decl);
6143 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6144 return void_zero_node;
6146 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6147 a class object, we can just pass the destructor to
6148 "__cxa_atexit"; we don't have to build a temporary function to do
6150 use_dtor = (flag_use_cxa_atexit
6151 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6152 && CLASS_TYPE_P (type));
6157 /* Find the destructor. */
6158 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6159 gcc_assert (idx >= 0);
6160 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6161 /* Make sure it is accessible. */
6162 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6166 /* Call build_cleanup before we enter the anonymous function so
6167 that any access checks will be done relative to the current
6168 scope, rather than the scope of the anonymous function. */
6169 build_cleanup (decl);
6171 /* Now start the function. */
6172 cleanup = start_cleanup_fn ();
6174 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6175 to the original function, rather than the anonymous one. That
6176 will make the back end think that nested functions are in use,
6177 which causes confusion. */
6178 push_deferring_access_checks (dk_no_check);
6179 fcall = build_cleanup (decl);
6180 pop_deferring_access_checks ();
6182 /* Create the body of the anonymous function. */
6183 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6184 finish_expr_stmt (fcall);
6185 finish_compound_stmt (compound_stmt);
6189 /* Call atexit with the cleanup function. */
6190 mark_used (cleanup);
6191 cleanup = build_address (cleanup);
6192 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6198 /* We must convert CLEANUP to the type that "__cxa_atexit"
6200 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6201 /* "__cxa_atexit" will pass the address of DECL to the
6202 cleanup function. */
6204 addr = build_address (decl);
6205 /* The declared type of the parameter to "__cxa_atexit" is
6206 "void *". For plain "T*", we could just let the
6207 machinery in cp_build_function_call convert it -- but if the
6208 type is "cv-qualified T *", then we need to convert it
6209 before passing it in, to avoid spurious errors. */
6210 addr = build_nop (ptr_type_node, addr);
6213 /* Since the cleanup functions we build ignore the address
6214 they're given, there's no reason to pass the actual address
6215 in, and, in general, it's cheaper to pass NULL than any
6217 addr = null_pointer_node;
6218 args = tree_cons (NULL_TREE,
6219 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6220 tf_warning_or_error),
6222 if (targetm.cxx.use_aeabi_atexit ())
6224 args = tree_cons (NULL_TREE, cleanup, args);
6225 args = tree_cons (NULL_TREE, addr, args);
6229 args = tree_cons (NULL_TREE, addr, args);
6230 args = tree_cons (NULL_TREE, cleanup, args);
6234 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6235 return cp_build_function_call (get_atexit_node (), args,
6236 tf_warning_or_error);
6239 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6240 is its initializer. Generate code to handle the construction
6241 and destruction of DECL. */
6244 expand_static_init (tree decl, tree init)
6246 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6247 gcc_assert (TREE_STATIC (decl));
6249 /* Some variables require no initialization. */
6251 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6252 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6255 if (DECL_FUNCTION_SCOPE_P (decl))
6257 /* Emit code to perform this initialization but once. */
6258 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6259 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6260 tree guard, guard_addr;
6261 tree acquire_fn, release_fn, abort_fn;
6264 /* Emit code to perform this initialization but once. This code
6267 static <type> guard;
6268 if (!guard.first_byte) {
6269 if (__cxa_guard_acquire (&guard)) {
6272 // Do initialization.
6273 flag = true; __cxa_guard_release (&guard);
6274 // Register variable for destruction at end of program.
6276 if (!flag) __cxa_guard_abort (&guard);
6280 Note that the `flag' variable is only set to 1 *after* the
6281 initialization is complete. This ensures that an exception,
6282 thrown during the construction, will cause the variable to
6283 reinitialized when we pass through this code again, as per:
6287 If the initialization exits by throwing an exception, the
6288 initialization is not complete, so it will be tried again
6289 the next time control enters the declaration.
6291 This process should be thread-safe, too; multiple threads
6292 should not be able to initialize the variable more than
6295 /* Create the guard variable. */
6296 guard = get_guard (decl);
6298 /* This optimization isn't safe on targets with relaxed memory
6299 consistency. On such targets we force synchronization in
6300 __cxa_guard_acquire. */
6301 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6303 /* Begin the conditional initialization. */
6304 if_stmt = begin_if_stmt ();
6305 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6306 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6309 if (flag_threadsafe_statics)
6311 guard_addr = build_address (guard);
6313 acquire_fn = get_identifier ("__cxa_guard_acquire");
6314 release_fn = get_identifier ("__cxa_guard_release");
6315 abort_fn = get_identifier ("__cxa_guard_abort");
6316 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6318 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6320 tree vfntype = build_function_type (void_type_node, argtypes);
6321 acquire_fn = push_library_fn
6322 (acquire_fn, build_function_type (integer_type_node, argtypes),
6324 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6325 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6329 release_fn = identifier_global_value (release_fn);
6330 abort_fn = identifier_global_value (abort_fn);
6333 inner_if_stmt = begin_if_stmt ();
6334 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6337 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6338 begin = get_target_expr (boolean_false_node);
6339 flag = TARGET_EXPR_SLOT (begin);
6341 TARGET_EXPR_CLEANUP (begin)
6342 = build3 (COND_EXPR, void_type_node, flag,
6344 build_call_n (abort_fn, 1, guard_addr));
6345 CLEANUP_EH_ONLY (begin) = 1;
6347 /* Do the initialization itself. */
6348 init = add_stmt_to_compound (begin, init);
6349 init = add_stmt_to_compound
6350 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6351 init = add_stmt_to_compound
6352 (init, build_call_n (release_fn, 1, guard_addr));
6355 init = add_stmt_to_compound (init, set_guard (guard));
6357 /* Use atexit to register a function for destroying this static
6359 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6361 finish_expr_stmt (init);
6363 if (flag_threadsafe_statics)
6365 finish_compound_stmt (inner_then_clause);
6366 finish_then_clause (inner_if_stmt);
6367 finish_if_stmt (inner_if_stmt);
6370 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6372 finish_compound_stmt (then_clause);
6373 finish_then_clause (if_stmt);
6374 finish_if_stmt (if_stmt);
6378 static_aggregates = tree_cons (init, decl, static_aggregates);
6382 /* Make TYPE a complete type based on INITIAL_VALUE.
6383 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6384 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6385 3 if the initializer list is empty (in pedantic mode). */
6388 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6391 tree type, elt_type;
6395 unsigned HOST_WIDE_INT i;
6398 /* An array of character type can be initialized from a
6399 brace-enclosed string constant.
6401 FIXME: this code is duplicated from reshape_init. Probably
6402 we should just call reshape_init here? */
6403 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6404 && TREE_CODE (initial_value) == CONSTRUCTOR
6405 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6407 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6408 tree value = VEC_index (constructor_elt, v, 0)->value;
6410 if (TREE_CODE (value) == STRING_CST
6411 && VEC_length (constructor_elt, v) == 1)
6412 initial_value = value;
6415 /* If any of the elements are parameter packs, we can't actually
6416 complete this type now because the array size is dependent. */
6417 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6419 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6422 if (PACK_EXPANSION_P (value))
6428 failure = complete_array_type (ptype, initial_value, do_default);
6430 /* We can create the array before the element type is complete, which
6431 means that we didn't have these two bits set in the original type
6432 either. In completing the type, we are expected to propagate these
6433 bits. See also complete_type which does the same thing for arrays
6436 if (TYPE_DOMAIN (type))
6438 elt_type = TREE_TYPE (type);
6439 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6440 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6441 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6447 /* Return zero if something is declared to be a member of type
6448 CTYPE when in the context of CUR_TYPE. STRING is the error
6449 message to print in that case. Otherwise, quietly return 1. */
6452 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6454 if (ctype && ctype != cur_type)
6456 if (flags == DTOR_FLAG)
6457 error ("destructor for alien class %qT cannot be a member", ctype);
6459 error ("constructor for alien class %qT cannot be a member", ctype);
6465 /* Subroutine of `grokdeclarator'. */
6467 /* Generate errors possibly applicable for a given set of specifiers.
6468 This is for ARM $7.1.2. */
6471 bad_specifiers (tree object,
6480 error ("%qD declared as a %<virtual%> %s", object, type);
6482 error ("%qD declared as an %<inline%> %s", object, type);
6484 error ("%<const%> and %<volatile%> function specifiers on "
6485 "%qD invalid in %s declaration",
6488 error ("%q+D declared as a friend", object);
6490 && (TREE_CODE (object) == TYPE_DECL
6491 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6492 && !TYPE_REFFN_P (TREE_TYPE (object))
6493 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6494 error ("%q+D declared with an exception specification", object);
6497 /* DECL is a member function or static data member and is presently
6498 being defined. Check that the definition is taking place in a
6502 check_class_member_definition_namespace (tree decl)
6504 /* These checks only apply to member functions and static data
6506 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6507 || TREE_CODE (decl) == VAR_DECL);
6508 /* We check for problems with specializations in pt.c in
6509 check_specialization_namespace, where we can issue better
6511 if (processing_specialization)
6513 /* There are no restrictions on the placement of
6514 explicit instantiations. */
6515 if (processing_explicit_instantiation)
6519 A member function definition that appears outside of the
6520 class definition shall appear in a namespace scope enclosing
6521 the class definition.
6525 The definition for a static data member shall appear in a
6526 namespace scope enclosing the member's class definition. */
6527 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6528 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6529 decl, DECL_CONTEXT (decl));
6532 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6533 METHOD_TYPE for a non-static member function; QUALS are the
6534 cv-qualifiers that apply to the function. */
6537 build_this_parm (tree type, cp_cv_quals quals)
6542 cp_cv_quals this_quals;
6544 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6545 /* The `this' parameter is implicitly `const'; it cannot be
6547 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6548 qual_type = cp_build_qualified_type (this_type, this_quals);
6549 parm = build_artificial_parm (this_identifier, qual_type);
6550 cp_apply_type_quals_to_decl (this_quals, parm);
6554 /* CTYPE is class type, or null if non-class.
6555 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6557 DECLARATOR is the function's name.
6558 PARMS is a chain of PARM_DECLs for the function.
6559 VIRTUALP is truthvalue of whether the function is virtual or not.
6560 FLAGS are to be passed through to `grokclassfn'.
6561 QUALS are qualifiers indicating whether the function is `const'
6563 RAISES is a list of exceptions that this function can raise.
6564 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6565 not look, and -1 if we should not call `grokclassfn' at all.
6567 SFK is the kind of special function (if any) for the new function.
6569 Returns `NULL_TREE' if something goes wrong, after issuing
6570 applicable error messages. */
6573 grokfndecl (tree ctype,
6577 tree orig_declarator,
6579 enum overload_flags flags,
6586 special_function_kind sfk,
6591 location_t location)
6594 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6598 type = build_exception_variant (type, raises);
6600 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6602 /* If we have an explicit location, use it, otherwise use whatever
6603 build_lang_decl used (probably input_location). */
6604 if (location != UNKNOWN_LOCATION)
6605 DECL_SOURCE_LOCATION (decl) = location;
6607 if (TREE_CODE (type) == METHOD_TYPE)
6610 parm = build_this_parm (type, quals);
6611 TREE_CHAIN (parm) = parms;
6614 DECL_ARGUMENTS (decl) = parms;
6615 for (t = parms; t; t = TREE_CHAIN (t))
6616 DECL_CONTEXT (t) = decl;
6617 /* Propagate volatile out from type to decl. */
6618 if (TYPE_VOLATILE (type))
6619 TREE_THIS_VOLATILE (decl) = 1;
6621 /* Setup decl according to sfk. */
6624 case sfk_constructor:
6625 case sfk_copy_constructor:
6626 DECL_CONSTRUCTOR_P (decl) = 1;
6628 case sfk_destructor:
6629 DECL_DESTRUCTOR_P (decl) = 1;
6635 /* If pointers to member functions use the least significant bit to
6636 indicate whether a function is virtual, ensure a pointer
6637 to this function will have that bit clear. */
6638 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6639 && TREE_CODE (type) == METHOD_TYPE
6640 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6641 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6644 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6648 ("defining explicit specialization %qD in friend declaration",
6652 tree fns = TREE_OPERAND (orig_declarator, 0);
6653 tree args = TREE_OPERAND (orig_declarator, 1);
6655 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6657 /* Something like `template <class T> friend void f<T>()'. */
6658 error ("invalid use of template-id %qD in declaration "
6659 "of primary template",
6665 /* A friend declaration of the form friend void f<>(). Record
6666 the information in the TEMPLATE_ID_EXPR. */
6667 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6669 if (TREE_CODE (fns) == COMPONENT_REF)
6671 /* Due to bison parser ickiness, we will have already looked
6672 up an operator_name or PFUNCNAME within the current class
6673 (see template_id in parse.y). If the current class contains
6674 such a name, we'll get a COMPONENT_REF here. Undo that. */
6676 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6677 == current_class_type);
6678 fns = TREE_OPERAND (fns, 1);
6680 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6681 || TREE_CODE (fns) == OVERLOAD);
6682 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6684 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6685 if (TREE_PURPOSE (t)
6686 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6688 error ("default arguments are not allowed in declaration "
6689 "of friend template specialization %qD",
6696 error ("%<inline%> is not allowed in declaration of friend "
6697 "template specialization %qD",
6704 /* If this decl has namespace scope, set that up. */
6706 set_decl_namespace (decl, in_namespace, friendp);
6708 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6710 /* `main' and builtins have implicit 'C' linkage. */
6711 if ((MAIN_NAME_P (declarator)
6712 || (IDENTIFIER_LENGTH (declarator) > 10
6713 && IDENTIFIER_POINTER (declarator)[0] == '_'
6714 && IDENTIFIER_POINTER (declarator)[1] == '_'
6715 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6716 && current_lang_name == lang_name_cplusplus
6717 && ctype == NULL_TREE
6718 /* NULL_TREE means global namespace. */
6719 && DECL_CONTEXT (decl) == NULL_TREE)
6720 SET_DECL_LANGUAGE (decl, lang_c);
6722 /* Should probably propagate const out from type to decl I bet (mrs). */
6725 DECL_STATIC_FUNCTION_P (decl) = 1;
6726 DECL_CONTEXT (decl) = ctype;
6731 DECL_CONTEXT (decl) = ctype;
6733 check_class_member_definition_namespace (decl);
6736 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6738 if (processing_template_decl)
6739 error ("cannot declare %<::main%> to be a template");
6741 error ("cannot declare %<::main%> to be inline");
6743 error ("cannot declare %<::main%> to be static");
6748 /* Members of anonymous types and local classes have no linkage; make
6749 them internal. If a typedef is made later, this will be changed. */
6750 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6751 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6754 TREE_PUBLIC (decl) = publicp;
6757 DECL_INTERFACE_KNOWN (decl) = 1;
6758 DECL_NOT_REALLY_EXTERN (decl) = 1;
6761 /* If the declaration was declared inline, mark it as such. */
6763 DECL_DECLARED_INLINE_P (decl) = 1;
6765 DECL_EXTERNAL (decl) = 1;
6766 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6769 ? G_("static member function %qD cannot have cv-qualifier")
6770 : G_("non-member function %qD cannot have cv-qualifier"),
6772 quals = TYPE_UNQUALIFIED;
6775 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6776 && !grok_op_properties (decl, /*complain=*/true))
6779 if (ctype && decl_function_context (decl))
6780 DECL_NO_STATIC_CHAIN (decl) = 1;
6783 /* Make the init_value nonzero so pushdecl knows this is not
6784 tentative. error_mark_node is replaced later with the BLOCK. */
6785 DECL_INITIAL (decl) = error_mark_node;
6787 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6788 TREE_NOTHROW (decl) = 1;
6790 /* Caller will do the rest of this. */
6794 if (ctype != NULL_TREE)
6795 grokclassfn (ctype, decl, flags);
6797 decl = check_explicit_specialization (orig_declarator, decl,
6800 4 * (friendp != 0));
6801 if (decl == error_mark_node)
6806 cplus_decl_attributes (&decl, *attrlist, 0);
6807 *attrlist = NULL_TREE;
6810 /* Check main's type after attributes have been applied. */
6811 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6813 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6816 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6818 error ("%<::main%> must return %<int%>");
6819 newtype = build_function_type (integer_type_node, oldtypeargs);
6820 TREE_TYPE (decl) = newtype;
6823 check_main_parameter_types (decl);
6826 if (ctype != NULL_TREE
6827 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6830 tree old_decl = check_classfn (ctype, decl,
6831 (processing_template_decl
6832 > template_class_depth (ctype))
6833 ? current_template_parms
6836 if (old_decl == error_mark_node)
6844 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6845 /* Because grokfndecl is always supposed to return a
6846 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6847 here. We depend on our callers to figure out that its
6848 really a template that's being returned. */
6849 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6851 if (DECL_STATIC_FUNCTION_P (old_decl)
6852 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6853 /* Remove the `this' parm added by grokclassfn.
6854 XXX Isn't this done in start_function, too? */
6855 revert_static_member_fn (decl);
6856 if (DECL_ARTIFICIAL (old_decl))
6858 error ("definition of implicitly-declared %qD", old_decl);
6862 /* Since we've smashed OLD_DECL to its
6863 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6864 if (TREE_CODE (decl) == TEMPLATE_DECL)
6865 decl = DECL_TEMPLATE_RESULT (decl);
6867 /* Attempt to merge the declarations. This can fail, in
6868 the case of some invalid specialization declarations. */
6869 pushed_scope = push_scope (ctype);
6870 ok = duplicate_decls (decl, old_decl, friendp);
6872 pop_scope (pushed_scope);
6875 error ("no %q#D member function declared in class %qT",
6883 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6886 if (ctype == NULL_TREE || check)
6890 DECL_VIRTUAL_P (decl) = 1;
6895 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6896 the linkage that DECL will receive in the object file. */
6899 set_linkage_for_static_data_member (tree decl)
6901 /* A static data member always has static storage duration and
6902 external linkage. Note that static data members are forbidden in
6903 local classes -- the only situation in which a class has
6904 non-external linkage. */
6905 TREE_PUBLIC (decl) = 1;
6906 TREE_STATIC (decl) = 1;
6907 /* For non-template classes, static data members are always put
6908 out in exactly those files where they are defined, just as
6909 with ordinary namespace-scope variables. */
6910 if (!processing_template_decl)
6911 DECL_INTERFACE_KNOWN (decl) = 1;
6914 /* Create a VAR_DECL named NAME with the indicated TYPE.
6916 If SCOPE is non-NULL, it is the class type or namespace containing
6917 the variable. If SCOPE is NULL, the variable should is created in
6918 the innermost enclosings scope. */
6921 grokvardecl (tree type,
6923 const cp_decl_specifier_seq *declspecs,
6929 tree explicit_scope;
6931 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6933 /* Compute the scope in which to place the variable, but remember
6934 whether or not that scope was explicitly specified by the user. */
6935 explicit_scope = scope;
6938 /* An explicit "extern" specifier indicates a namespace-scope
6940 if (declspecs->storage_class == sc_extern)
6941 scope = current_namespace;
6942 else if (!at_function_scope_p ())
6943 scope = current_scope ();
6947 && (/* If the variable is a namespace-scope variable declared in a
6948 template, we need DECL_LANG_SPECIFIC. */
6949 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6950 /* Similarly for namespace-scope variables with language linkage
6952 || (TREE_CODE (scope) == NAMESPACE_DECL
6953 && current_lang_name != lang_name_cplusplus)
6954 /* Similarly for static data members. */
6956 decl = build_lang_decl (VAR_DECL, name, type);
6958 decl = build_decl (input_location, VAR_DECL, name, type);
6960 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6961 set_decl_namespace (decl, explicit_scope, 0);
6963 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6965 if (declspecs->storage_class == sc_extern)
6967 DECL_THIS_EXTERN (decl) = 1;
6968 DECL_EXTERNAL (decl) = !initialized;
6971 if (DECL_CLASS_SCOPE_P (decl))
6973 set_linkage_for_static_data_member (decl);
6974 /* This function is only called with out-of-class definitions. */
6975 DECL_EXTERNAL (decl) = 0;
6976 check_class_member_definition_namespace (decl);
6978 /* At top level, either `static' or no s.c. makes a definition
6979 (perhaps tentative), and absence of `static' makes it public. */
6980 else if (toplevel_bindings_p ())
6982 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6983 && (DECL_THIS_EXTERN (decl) || ! constp));
6984 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6986 /* Not at top level, only `static' makes a static definition. */
6989 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6990 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6993 if (declspecs->specs[(int)ds_thread])
6994 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6996 if (TREE_PUBLIC (decl))
6998 /* If the type of the decl has no linkage, make sure that we'll
6999 notice that in mark_used. */
7000 if (DECL_LANG_SPECIFIC (decl) == NULL
7001 && TREE_PUBLIC (decl)
7002 && !DECL_EXTERN_C_P (decl)
7003 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7004 retrofit_lang_decl (decl);
7007 DECL_INTERFACE_KNOWN (decl) = 1;
7012 /* Create and return a canonical pointer to member function type, for
7013 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7016 build_ptrmemfunc_type (tree type)
7020 tree unqualified_variant = NULL_TREE;
7022 if (type == error_mark_node)
7025 /* If a canonical type already exists for this type, use it. We use
7026 this method instead of type_hash_canon, because it only does a
7027 simple equality check on the list of field members. */
7029 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7032 /* Make sure that we always have the unqualified pointer-to-member
7034 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7036 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7038 t = make_class_type (RECORD_TYPE);
7039 xref_basetypes (t, NULL_TREE);
7041 /* Let the front end know this is a pointer to member function... */
7042 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7043 /* ... and not really a class type. */
7044 SET_CLASS_TYPE_P (t, 0);
7046 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7049 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7051 TREE_CHAIN (field) = fields;
7054 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7056 /* Zap out the name so that the back end will give us the debugging
7057 information for this anonymous RECORD_TYPE. */
7058 TYPE_NAME (t) = NULL_TREE;
7060 /* If this is not the unqualified form of this pointer-to-member
7061 type, set the TYPE_MAIN_VARIANT for this type to be the
7062 unqualified type. Since they are actually RECORD_TYPEs that are
7063 not variants of each other, we must do this manually.
7064 As we just built a new type there is no need to do yet another copy. */
7065 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7067 int type_quals = cp_type_quals (type);
7068 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7069 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7070 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7071 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7072 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7073 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7074 TREE_TYPE (TYPE_BINFO (t)) = t;
7077 /* Cache this pointer-to-member type so that we can find it again
7079 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7081 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7082 SET_TYPE_STRUCTURAL_EQUALITY (t);
7083 else if (TYPE_CANONICAL (type) != type)
7084 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7089 /* Create and return a pointer to data member type. */
7092 build_ptrmem_type (tree class_type, tree member_type)
7094 if (TREE_CODE (member_type) == METHOD_TYPE)
7098 arg_types = TYPE_ARG_TYPES (member_type);
7099 class_type = (cp_build_qualified_type
7101 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7103 = build_method_type_directly (class_type,
7104 TREE_TYPE (member_type),
7105 TREE_CHAIN (arg_types));
7106 return build_ptrmemfunc_type (build_pointer_type (member_type));
7110 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7111 return build_offset_type (class_type, member_type);
7115 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7116 Check to see that the definition is valid. Issue appropriate error
7117 messages. Return 1 if the definition is particularly bad, or 0
7121 check_static_variable_definition (tree decl, tree type)
7123 /* Motion 10 at San Diego: If a static const integral data member is
7124 initialized with an integral constant expression, the initializer
7125 may appear either in the declaration (within the class), or in
7126 the definition, but not both. If it appears in the class, the
7127 member is a member constant. The file-scope definition is always
7129 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7131 error ("invalid in-class initialization of static data member "
7132 "of non-integral type %qT",
7134 /* If we just return the declaration, crashes will sometimes
7135 occur. We therefore return void_type_node, as if this were a
7136 friend declaration, to cause callers to completely ignore
7137 this declaration. */
7140 else if (!CP_TYPE_CONST_P (type))
7141 error ("ISO C++ forbids in-class initialization of non-const "
7142 "static member %qD",
7144 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7145 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7146 "%qD of non-integral type %qT", decl, type);
7151 /* Given the SIZE (i.e., number of elements) in an array, compute an
7152 appropriate index type for the array. If non-NULL, NAME is the
7153 name of the thing being declared. */
7156 compute_array_index_type (tree name, tree size)
7160 tree abi_1_itype = NULL_TREE;
7162 if (error_operand_p (size))
7163 return error_mark_node;
7165 type = TREE_TYPE (size);
7166 /* The array bound must be an integer type. */
7167 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7170 error ("size of array %qD has non-integral type %qT", name, type);
7172 error ("size of array has non-integral type %qT", type);
7173 size = integer_one_node;
7174 type = TREE_TYPE (size);
7177 /* We can only call value_dependent_expression_p on integral constant
7178 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7179 set if this isn't one. */
7180 if (processing_template_decl
7181 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7183 /* We cannot do any checking for a SIZE that isn't known to be
7184 constant. Just build the index type and mark that it requires
7185 structural equality checks. */
7186 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7187 size, integer_one_node));
7188 if (!TREE_SIDE_EFFECTS (size))
7190 TYPE_DEPENDENT_P (itype) = 1;
7191 TYPE_DEPENDENT_P_VALID (itype) = 1;
7193 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7197 if (!abi_version_at_least (2) && processing_template_decl)
7198 /* For abi-1, we handled all instances in templates the same way,
7199 even when they were non-dependent. This affects the manglings
7200 produced. So, we do the normal checking for non-dependent
7201 sizes, but at the end we'll return the same type that abi-1
7202 would have, but with TYPE_CANONICAL set to the "right"
7203 value that the current ABI would provide. */
7204 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7205 size, integer_one_node));
7207 /* The size might be the result of a cast. */
7208 STRIP_TYPE_NOPS (size);
7210 /* It might be a const variable or enumeration constant. */
7211 size = integral_constant_value (size);
7213 /* Normally, the array-bound will be a constant. */
7214 if (TREE_CODE (size) == INTEGER_CST)
7216 /* Check to see if the array bound overflowed. Make that an
7217 error, no matter how generous we're being. */
7218 constant_expression_error (size);
7220 /* An array must have a positive number of elements. */
7221 if (INT_CST_LT (size, integer_zero_node))
7224 error ("size of array %qD is negative", name);
7226 error ("size of array is negative");
7227 size = integer_one_node;
7229 /* As an extension we allow zero-sized arrays. We always allow
7230 them in system headers because glibc uses them. */
7231 else if (integer_zerop (size) && !in_system_header)
7234 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7236 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7239 else if (TREE_CONSTANT (size))
7241 /* `(int) &fn' is not a valid array bound. */
7243 error ("size of array %qD is not an integral constant-expression",
7246 error ("size of array is not an integral constant-expression");
7247 size = integer_one_node;
7249 else if (pedantic && warn_vla != 0)
7252 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7254 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7256 else if (warn_vla > 0)
7260 "variable length array %qD is used", name);
7263 "variable length array is used");
7266 if (processing_template_decl && !TREE_CONSTANT (size))
7267 /* A variable sized array. */
7268 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7271 HOST_WIDE_INT saved_processing_template_decl;
7273 /* Compute the index of the largest element in the array. It is
7274 one less than the number of elements in the array. We save
7275 and restore PROCESSING_TEMPLATE_DECL so that computations in
7276 cp_build_binary_op will be appropriately folded. */
7277 saved_processing_template_decl = processing_template_decl;
7278 processing_template_decl = 0;
7279 itype = cp_build_binary_op (input_location,
7281 cp_convert (ssizetype, size),
7282 cp_convert (ssizetype, integer_one_node),
7283 tf_warning_or_error);
7284 itype = fold (itype);
7285 processing_template_decl = saved_processing_template_decl;
7287 if (!TREE_CONSTANT (itype))
7288 /* A variable sized array. */
7289 itype = variable_size (itype);
7290 /* Make sure that there was no overflow when creating to a signed
7291 index type. (For example, on a 32-bit machine, an array with
7292 size 2^32 - 1 is too big.) */
7293 else if (TREE_CODE (itype) == INTEGER_CST
7294 && TREE_OVERFLOW (itype))
7296 error ("overflow in array dimension");
7297 TREE_OVERFLOW (itype) = 0;
7301 /* Create and return the appropriate index type. */
7304 tree t = build_index_type (itype);
7305 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7309 return build_index_type (itype);
7312 /* Returns the scope (if any) in which the entity declared by
7313 DECLARATOR will be located. If the entity was declared with an
7314 unqualified name, NULL_TREE is returned. */
7317 get_scope_of_declarator (const cp_declarator *declarator)
7319 while (declarator && declarator->kind != cdk_id)
7320 declarator = declarator->declarator;
7322 /* If the declarator-id is a SCOPE_REF, the scope in which the
7323 declaration occurs is the first operand. */
7325 && declarator->u.id.qualifying_scope)
7326 return declarator->u.id.qualifying_scope;
7328 /* Otherwise, the declarator is not a qualified name; the entity will
7329 be declared in the current scope. */
7333 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7334 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7338 create_array_type_for_decl (tree name, tree type, tree size)
7340 tree itype = NULL_TREE;
7341 const char* error_msg;
7343 /* If things have already gone awry, bail now. */
7344 if (type == error_mark_node || size == error_mark_node)
7345 return error_mark_node;
7347 /* Assume that everything will go OK. */
7350 /* There are some types which cannot be array elements. */
7351 switch (TREE_CODE (type))
7354 error_msg = "array of void";
7358 error_msg = "array of functions";
7361 case REFERENCE_TYPE:
7362 error_msg = "array of references";
7366 error_msg = "array of function members";
7373 /* If something went wrong, issue an error-message and return. */
7377 error ("declaration of %qD as %s", name, error_msg);
7379 error ("creating %s", error_msg);
7381 return error_mark_node;
7386 The constant expressions that specify the bounds of the arrays
7387 can be omitted only for the first member of the sequence. */
7388 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7391 error ("declaration of %qD as multidimensional array must "
7392 "have bounds for all dimensions except the first",
7395 error ("multidimensional array must have bounds for all "
7396 "dimensions except the first");
7398 return error_mark_node;
7401 /* Figure out the index type for the array. */
7403 itype = compute_array_index_type (name, size);
7406 T is called the array element type; this type shall not be [...] an
7407 abstract class type. */
7408 abstract_virtuals_error (name, type);
7410 return build_cplus_array_type (type, itype);
7413 /* Check that it's OK to declare a function with the indicated TYPE.
7414 SFK indicates the kind of special function (if any) that this
7415 function is. OPTYPE is the type given in a conversion operator
7416 declaration, or the class type for a constructor/destructor.
7417 Returns the actual return type of the function; that
7418 may be different than TYPE if an error occurs, or for certain
7419 special functions. */
7422 check_special_function_return_type (special_function_kind sfk,
7428 case sfk_constructor:
7430 error ("return type specification for constructor invalid");
7432 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7433 type = build_pointer_type (optype);
7435 type = void_type_node;
7438 case sfk_destructor:
7440 error ("return type specification for destructor invalid");
7441 /* We can't use the proper return type here because we run into
7442 problems with ambiguous bases and covariant returns.
7443 Java classes are left unchanged because (void *) isn't a valid
7444 Java type, and we don't want to change the Java ABI. */
7445 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7446 type = build_pointer_type (void_type_node);
7448 type = void_type_node;
7451 case sfk_conversion:
7453 error ("return type specified for %<operator %T%>", optype);
7464 /* A variable or data member (whose unqualified name is IDENTIFIER)
7465 has been declared with the indicated TYPE. If the TYPE is not
7466 acceptable, issue an error message and return a type to use for
7467 error-recovery purposes. */
7470 check_var_type (tree identifier, tree type)
7472 if (VOID_TYPE_P (type))
7475 error ("unnamed variable or field declared void");
7476 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7478 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7479 error ("variable or field %qE declared void", identifier);
7482 error ("variable or field declared void");
7483 type = error_mark_node;
7489 /* Given declspecs and a declarator (abstract or otherwise), determine
7490 the name and type of the object declared and construct a DECL node
7493 DECLSPECS points to the representation of declaration-specifier
7494 sequence that precedes declarator.
7496 DECL_CONTEXT says which syntactic context this declaration is in:
7497 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7498 FUNCDEF for a function definition. Like NORMAL but a few different
7499 error messages in each case. Return value may be zero meaning
7500 this definition is too screwy to try to parse.
7501 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7502 handle member functions (which have FIELD context).
7503 Return value may be zero meaning this definition is too screwy to
7505 PARM for a parameter declaration (either within a function prototype
7506 or before a function body). Make a PARM_DECL, or return void_type_node.
7507 CATCHPARM for a parameter declaration before a catch clause.
7508 TYPENAME if for a typename (in a cast or sizeof).
7509 Don't make a DECL node; just return the ..._TYPE node.
7510 FIELD for a struct or union field; make a FIELD_DECL.
7511 BITFIELD for a field with specified width.
7512 INITIALIZED is as for start_decl.
7514 ATTRLIST is a pointer to the list of attributes, which may be NULL
7515 if there are none; *ATTRLIST may be modified if attributes from inside
7516 the declarator should be applied to the declaration.
7518 When this function is called, scoping variables (such as
7519 CURRENT_CLASS_TYPE) should reflect the scope in which the
7520 declaration occurs, not the scope in which the new declaration will
7521 be placed. For example, on:
7525 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7528 Returns a DECL (if a declarator is present), a TYPE (if there is no
7529 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7533 grokdeclarator (const cp_declarator *declarator,
7534 const cp_decl_specifier_seq *declspecs,
7535 enum decl_context decl_context,
7539 tree type = NULL_TREE;
7541 int virtualp, explicitp, friendp, inlinep, staticp;
7542 int explicit_int = 0;
7543 int explicit_char = 0;
7544 int defaulted_int = 0;
7545 tree dependent_name = NULL_TREE;
7547 tree typedef_decl = NULL_TREE;
7548 const char *name = NULL;
7549 tree typedef_type = NULL_TREE;
7550 /* True if this declarator is a function definition. */
7551 bool funcdef_flag = false;
7552 cp_declarator_kind innermost_code = cdk_error;
7555 /* See the code below that used this. */
7556 tree decl_attr = NULL_TREE;
7559 /* Keep track of what sort of function is being processed
7560 so that we can warn about default return values, or explicit
7561 return values which do not match prescribed defaults. */
7562 special_function_kind sfk = sfk_none;
7564 tree dname = NULL_TREE;
7565 tree ctor_return_type = NULL_TREE;
7566 enum overload_flags flags = NO_SPECIAL;
7567 /* cv-qualifiers that apply to the declarator, for a declaration of
7568 a member function. */
7569 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7570 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7572 tree raises = NULL_TREE;
7573 int template_count = 0;
7574 tree returned_attrs = NULL_TREE;
7575 tree parms = NULL_TREE;
7576 const cp_declarator *id_declarator;
7577 /* The unqualified name of the declarator; either an
7578 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7579 tree unqualified_id;
7580 /* The class type, if any, in which this entity is located,
7581 or NULL_TREE if none. Note that this value may be different from
7582 the current class type; for example if an attempt is made to declare
7583 "A::f" inside "B", this value will be "A". */
7584 tree ctype = current_class_type;
7585 /* The NAMESPACE_DECL for the namespace in which this entity is
7586 located. If an unqualified name is used to declare the entity,
7587 this value will be NULL_TREE, even if the entity is located at
7589 tree in_namespace = NULL_TREE;
7590 cp_storage_class storage_class;
7591 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7592 bool type_was_error_mark_node = false;
7593 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7594 bool template_type_arg = false;
7597 signed_p = declspecs->specs[(int)ds_signed];
7598 unsigned_p = declspecs->specs[(int)ds_unsigned];
7599 short_p = declspecs->specs[(int)ds_short];
7600 long_p = declspecs->specs[(int)ds_long];
7601 longlong = declspecs->specs[(int)ds_long] >= 2;
7602 thread_p = declspecs->specs[(int)ds_thread];
7604 if (decl_context == FUNCDEF)
7605 funcdef_flag = true, decl_context = NORMAL;
7606 else if (decl_context == MEMFUNCDEF)
7607 funcdef_flag = true, decl_context = FIELD;
7608 else if (decl_context == BITFIELD)
7609 bitfield = 1, decl_context = FIELD;
7610 else if (decl_context == TEMPLATE_TYPE_ARG)
7611 template_type_arg = true, decl_context = TYPENAME;
7613 if (initialized > 1)
7614 funcdef_flag = true;
7616 /* Look inside a declarator for the name being declared
7617 and get it as a string, for an error message. */
7618 for (id_declarator = declarator;
7620 id_declarator = id_declarator->declarator)
7622 if (id_declarator->kind != cdk_id)
7623 innermost_code = id_declarator->kind;
7625 switch (id_declarator->kind)
7628 if (id_declarator->declarator
7629 && id_declarator->declarator->kind == cdk_id)
7631 sfk = id_declarator->declarator->u.id.sfk;
7632 if (sfk == sfk_destructor)
7639 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7640 tree decl = id_declarator->u.id.unqualified_name;
7643 if (qualifying_scope)
7645 if (at_function_scope_p ())
7649 A declarator-id shall not be qualified except
7652 None of the cases are permitted in block
7654 if (qualifying_scope == global_namespace)
7655 error ("invalid use of qualified-name %<::%D%>",
7657 else if (TYPE_P (qualifying_scope))
7658 error ("invalid use of qualified-name %<%T::%D%>",
7659 qualifying_scope, decl);
7661 error ("invalid use of qualified-name %<%D::%D%>",
7662 qualifying_scope, decl);
7663 return error_mark_node;
7665 else if (TYPE_P (qualifying_scope))
7667 ctype = qualifying_scope;
7668 if (innermost_code != cdk_function
7669 && current_class_type
7670 && !UNIQUELY_DERIVED_FROM_P (ctype,
7671 current_class_type))
7673 error ("type %qT is not derived from type %qT",
7674 ctype, current_class_type);
7675 return error_mark_node;
7678 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7679 in_namespace = qualifying_scope;
7681 switch (TREE_CODE (decl))
7687 if (innermost_code != cdk_function)
7689 error ("declaration of %qD as non-function", decl);
7690 return error_mark_node;
7692 else if (!qualifying_scope
7693 && !(current_class_type && at_class_scope_p ()))
7695 error ("declaration of %qD as non-member", decl);
7696 return error_mark_node;
7699 type = TREE_OPERAND (decl, 0);
7701 type = constructor_name (type);
7702 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7707 case TEMPLATE_ID_EXPR:
7709 tree fns = TREE_OPERAND (decl, 0);
7712 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7714 gcc_assert (is_overloaded_fn (dname));
7715 dname = DECL_NAME (get_first_fn (dname));
7720 case IDENTIFIER_NODE:
7721 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7724 if (C_IS_RESERVED_WORD (dname))
7726 error ("declarator-id missing; using reserved word %qD",
7728 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7730 else if (!IDENTIFIER_TYPENAME_P (dname))
7731 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7734 gcc_assert (flags == NO_SPECIAL);
7735 flags = TYPENAME_FLAG;
7736 ctor_return_type = TREE_TYPE (dname);
7737 sfk = sfk_conversion;
7738 if (is_typename_at_global_scope (dname))
7739 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7741 name = "<invalid operator>";
7758 return error_mark_node;
7763 if (id_declarator->kind == cdk_id)
7769 The declarator in a function-definition shall have the form
7770 D1 ( parameter-declaration-clause) ... */
7771 if (funcdef_flag && innermost_code != cdk_function)
7773 error ("function definition does not declare parameters");
7774 return error_mark_node;
7777 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7778 && innermost_code != cdk_function
7779 && ! (ctype && !declspecs->any_specifiers_p))
7781 error ("declaration of %qD as non-function", dname);
7782 return error_mark_node;
7785 /* Anything declared one level down from the top level
7786 must be one of the parameters of a function
7787 (because the body is at least two levels down). */
7789 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7790 by not allowing C++ class definitions to specify their parameters
7791 with xdecls (must be spec.d in the parmlist).
7793 Since we now wait to push a class scope until we are sure that
7794 we are in a legitimate method context, we must set oldcname
7795 explicitly (since current_class_name is not yet alive).
7797 We also want to avoid calling this a PARM if it is in a namespace. */
7799 if (decl_context == NORMAL && !toplevel_bindings_p ())
7801 struct cp_binding_level *b = current_binding_level;
7802 current_binding_level = b->level_chain;
7803 if (current_binding_level != 0 && toplevel_bindings_p ())
7804 decl_context = PARM;
7805 current_binding_level = b;
7809 name = decl_context == PARM ? "parameter" : "type name";
7811 /* If there were multiple types specified in the decl-specifier-seq,
7812 issue an error message. */
7813 if (declspecs->multiple_types_p)
7815 error ("two or more data types in declaration of %qs", name);
7816 return error_mark_node;
7819 if (declspecs->conflicting_specifiers_p)
7821 error ("conflicting specifiers in declaration of %qs", name);
7822 return error_mark_node;
7825 /* Extract the basic type from the decl-specifier-seq. */
7826 type = declspecs->type;
7827 if (type == error_mark_node)
7830 type_was_error_mark_node = true;
7832 /* If the entire declaration is itself tagged as deprecated then
7833 suppress reports of deprecated items. */
7834 if (type && TREE_DEPRECATED (type)
7835 && deprecated_state != DEPRECATED_SUPPRESS)
7836 warn_deprecated_use (type, NULL_TREE);
7837 if (type && TREE_CODE (type) == TYPE_DECL)
7839 typedef_decl = type;
7840 type = TREE_TYPE (typedef_decl);
7841 if (TREE_DEPRECATED (type)
7842 && DECL_ARTIFICIAL (typedef_decl)
7843 && deprecated_state != DEPRECATED_SUPPRESS)
7844 warn_deprecated_use (type, NULL_TREE);
7846 /* No type at all: default to `int', and set DEFAULTED_INT
7847 because it was not a user-defined typedef. */
7848 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7850 /* These imply 'int'. */
7851 type = integer_type_node;
7855 explicit_int = declspecs->explicit_int_p;
7856 explicit_char = declspecs->explicit_char_p;
7859 /* See the code below that used this. */
7861 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7863 typedef_type = type;
7866 if (sfk != sfk_conversion)
7867 ctor_return_type = ctype;
7869 if (sfk != sfk_none)
7870 type = check_special_function_return_type (sfk, type,
7872 else if (type == NULL_TREE)
7878 /* We handle `main' specially here, because 'main () { }' is so
7879 common. With no options, it is allowed. With -Wreturn-type,
7880 it is a warning. It is only an error with -pedantic-errors. */
7881 is_main = (funcdef_flag
7882 && dname && MAIN_NAME_P (dname)
7883 && ctype == NULL_TREE
7884 && in_namespace == NULL_TREE
7885 && current_namespace == global_namespace);
7887 if (type_was_error_mark_node)
7888 /* We've already issued an error, don't complain more. */;
7889 else if (in_system_header || flag_ms_extensions)
7890 /* Allow it, sigh. */;
7892 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7894 pedwarn (input_location, OPT_pedantic,
7895 "ISO C++ forbids declaration of %qs with no type", name);
7897 warning (OPT_Wreturn_type,
7898 "ISO C++ forbids declaration of %qs with no type", name);
7900 type = integer_type_node;
7905 /* Now process the modifiers that were specified
7906 and check for invalid combinations. */
7908 /* Long double is a special combination. */
7909 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7912 type = build_qualified_type (long_double_type_node,
7913 cp_type_quals (type));
7916 /* Check all other uses of type modifiers. */
7918 if (unsigned_p || signed_p || long_p || short_p)
7922 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7923 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7924 else if (signed_p && unsigned_p)
7925 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7926 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7927 error ("%<long long%> invalid for %qs", name);
7928 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7929 error ("%<long%> invalid for %qs", name);
7930 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7931 error ("%<short%> invalid for %qs", name);
7932 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7933 error ("%<long%> or %<short%> invalid for %qs", name);
7934 else if ((long_p || short_p) && explicit_char)
7935 error ("%<long%> or %<short%> specified with char for %qs", name);
7936 else if (long_p && short_p)
7937 error ("%<long%> and %<short%> specified together for %qs", name);
7938 else if (type == char16_type_node || type == char32_type_node)
7940 if (signed_p || unsigned_p)
7941 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7942 else if (short_p || long_p)
7943 error ("%<short%> or %<long%> invalid for %qs", name);
7948 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7950 pedwarn (input_location, OPT_pedantic,
7951 "long, short, signed or unsigned used invalidly for %qs",
7953 if (flag_pedantic_errors)
7958 /* Discard the type modifiers if they are invalid. */
7969 /* Decide whether an integer type is signed or not.
7970 Optionally treat bitfields as signed by default. */
7974 It is implementation-defined whether a plain (neither
7975 explicitly signed or unsigned) char, short, int, or long
7976 bit-field is signed or unsigned.
7978 Naturally, we extend this to long long as well. Note that
7979 this does not include wchar_t. */
7980 || (bitfield && !flag_signed_bitfields
7982 /* A typedef for plain `int' without `signed' can be
7983 controlled just like plain `int', but a typedef for
7984 `signed int' cannot be so controlled. */
7986 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7987 && TREE_CODE (type) == INTEGER_TYPE
7988 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7991 type = long_long_unsigned_type_node;
7993 type = long_unsigned_type_node;
7995 type = short_unsigned_type_node;
7996 else if (type == char_type_node)
7997 type = unsigned_char_type_node;
7998 else if (typedef_decl)
7999 type = unsigned_type_for (type);
8001 type = unsigned_type_node;
8003 else if (signed_p && type == char_type_node)
8004 type = signed_char_type_node;
8006 type = long_long_integer_type_node;
8008 type = long_integer_type_node;
8010 type = short_integer_type_node;
8012 if (declspecs->specs[(int)ds_complex])
8014 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8015 error ("complex invalid for %qs", name);
8016 /* If we just have "complex", it is equivalent to
8017 "complex double", but if any modifiers at all are specified it is
8018 the complex form of TYPE. E.g, "complex short" is
8019 "complex short int". */
8021 else if (defaulted_int && ! longlong
8022 && ! (long_p || short_p || signed_p || unsigned_p))
8023 type = complex_double_type_node;
8024 else if (type == integer_type_node)
8025 type = complex_integer_type_node;
8026 else if (type == float_type_node)
8027 type = complex_float_type_node;
8028 else if (type == double_type_node)
8029 type = complex_double_type_node;
8030 else if (type == long_double_type_node)
8031 type = complex_long_double_type_node;
8033 type = build_complex_type (type);
8036 type_quals = TYPE_UNQUALIFIED;
8037 if (declspecs->specs[(int)ds_const])
8038 type_quals |= TYPE_QUAL_CONST;
8039 if (declspecs->specs[(int)ds_volatile])
8040 type_quals |= TYPE_QUAL_VOLATILE;
8041 if (declspecs->specs[(int)ds_restrict])
8042 type_quals |= TYPE_QUAL_RESTRICT;
8043 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8044 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8047 if (TREE_CODE (type) == FUNCTION_TYPE
8048 && type_quals != TYPE_UNQUALIFIED)
8050 /* This was an error in C++98 (cv-qualifiers cannot be added to
8051 a function type), but DR 295 makes the code well-formed by
8052 dropping the extra qualifiers. */
8055 tree bad_type = build_qualified_type (type, type_quals);
8056 pedwarn (input_location, OPT_pedantic,
8057 "ignoring %qV qualifiers added to function type %qT",
8060 type_quals = TYPE_UNQUALIFIED;
8062 type_quals |= cp_type_quals (type);
8063 type = cp_build_qualified_type_real
8064 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8065 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8066 /* We might have ignored or rejected some of the qualifiers. */
8067 type_quals = cp_type_quals (type);
8070 inlinep = !! declspecs->specs[(int)ds_inline];
8071 virtualp = !! declspecs->specs[(int)ds_virtual];
8072 explicitp = !! declspecs->specs[(int)ds_explicit];
8074 storage_class = declspecs->storage_class;
8075 if (storage_class == sc_static)
8076 staticp = 1 + (decl_context == FIELD);
8078 if (virtualp && staticp == 2)
8080 error ("member %qD cannot be declared both virtual and static", dname);
8081 storage_class = sc_none;
8084 friendp = !! declspecs->specs[(int)ds_friend];
8086 if (dependent_name && !friendp)
8088 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8089 return error_mark_node;
8092 /* Issue errors about use of storage classes for parameters. */
8093 if (decl_context == PARM)
8095 if (declspecs->specs[(int)ds_typedef])
8097 error ("typedef declaration invalid in parameter declaration");
8098 return error_mark_node;
8100 else if (storage_class == sc_static
8101 || storage_class == sc_extern
8103 error ("storage class specifiers invalid in parameter declarations");
8105 if (type_uses_auto (type))
8107 error ("parameter declared %<auto%>");
8108 type = error_mark_node;
8112 /* Give error if `virtual' is used outside of class declaration. */
8114 && (current_class_name == NULL_TREE || decl_context != FIELD))
8116 error ("%<virtual%> outside class declaration");
8120 /* Static anonymous unions are dealt with here. */
8121 if (staticp && decl_context == TYPENAME
8123 && ANON_AGGR_TYPE_P (declspecs->type))
8124 decl_context = FIELD;
8126 /* Warn about storage classes that are invalid for certain
8127 kinds of declarations (parameters, typenames, etc.). */
8130 && storage_class != sc_extern
8131 && storage_class != sc_static)
8132 || declspecs->specs[(int)ds_typedef]))
8134 error ("multiple storage classes in declaration of %qs", name);
8137 if (decl_context != NORMAL
8138 && ((storage_class != sc_none
8139 && storage_class != sc_mutable)
8142 if ((decl_context == PARM || decl_context == CATCHPARM)
8143 && (storage_class == sc_register
8144 || storage_class == sc_auto))
8146 else if (declspecs->specs[(int)ds_typedef])
8148 else if (decl_context == FIELD
8149 /* C++ allows static class elements. */
8150 && storage_class == sc_static)
8151 /* C++ also allows inlines and signed and unsigned elements,
8152 but in those cases we don't come in here. */
8156 if (decl_context == FIELD)
8157 error ("storage class specified for %qs", name);
8160 if (decl_context == PARM || decl_context == CATCHPARM)
8161 error ("storage class specified for parameter %qs", name);
8163 error ("storage class specified for typename");
8165 if (storage_class == sc_register
8166 || storage_class == sc_auto
8167 || storage_class == sc_extern
8169 storage_class = sc_none;
8172 else if (storage_class == sc_extern && funcdef_flag
8173 && ! toplevel_bindings_p ())
8174 error ("nested function %qs declared %<extern%>", name);
8175 else if (toplevel_bindings_p ())
8177 if (storage_class == sc_auto)
8178 error ("top-level declaration of %qs specifies %<auto%>", name);
8181 && storage_class != sc_extern
8182 && storage_class != sc_static)
8184 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8189 if (storage_class && friendp)
8191 error ("storage class specifiers invalid in friend function declarations");
8192 storage_class = sc_none;
8197 unqualified_id = NULL_TREE;
8200 unqualified_id = id_declarator->u.id.unqualified_name;
8201 switch (TREE_CODE (unqualified_id))
8204 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8205 if (TYPE_P (unqualified_id))
8206 unqualified_id = constructor_name (unqualified_id);
8209 case IDENTIFIER_NODE:
8210 case TEMPLATE_ID_EXPR:
8218 /* Determine the type of the entity declared by recurring on the
8220 for (; declarator; declarator = declarator->declarator)
8222 const cp_declarator *inner_declarator;
8225 if (type == error_mark_node)
8226 return error_mark_node;
8228 attrs = declarator->attributes;
8234 if (declarator == NULL || declarator->kind == cdk_id)
8235 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8236 if (declarator->kind == cdk_function)
8237 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8238 if (declarator->kind == cdk_array)
8239 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8240 returned_attrs = decl_attributes (&type,
8241 chainon (returned_attrs, attrs),
8245 if (declarator->kind == cdk_id)
8248 inner_declarator = declarator->declarator;
8250 switch (declarator->kind)
8253 type = create_array_type_for_decl (dname, type,
8254 declarator->u.array.bounds);
8262 /* Declaring a function type.
8263 Make sure we have a valid type for the function to return. */
8265 if (type_quals != TYPE_UNQUALIFIED)
8267 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8268 warning (OPT_Wignored_qualifiers,
8269 "type qualifiers ignored on function return type");
8270 /* We now know that the TYPE_QUALS don't apply to the
8271 decl, but to its return type. */
8272 type_quals = TYPE_UNQUALIFIED;
8274 errmsg = targetm.invalid_return_type (type);
8278 type = integer_type_node;
8281 /* Error about some types functions can't return. */
8283 if (TREE_CODE (type) == FUNCTION_TYPE)
8285 error ("%qs declared as function returning a function", name);
8286 return error_mark_node;
8288 if (TREE_CODE (type) == ARRAY_TYPE)
8290 error ("%qs declared as function returning an array", name);
8291 return error_mark_node;
8294 /* Pick up type qualifiers which should be applied to `this'. */
8295 memfn_quals = declarator->u.function.qualifiers;
8297 /* Pick up the exception specifications. */
8298 raises = declarator->u.function.exception_specification;
8300 /* Say it's a definition only for the CALL_EXPR
8301 closest to the identifier. */
8302 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8304 /* Handle a late-specified return type. */
8307 if (type_uses_auto (type))
8309 if (!declarator->u.function.late_return_type)
8311 error ("%qs function uses %<auto%> type specifier without"
8312 " late return type", name);
8313 return error_mark_node;
8315 else if (!is_auto (type))
8317 error ("%qs function with late return type has"
8318 " %qT as its type rather than plain %<auto%>",
8320 return error_mark_node;
8323 else if (declarator->u.function.late_return_type)
8325 error ("%qs function with late return type not declared"
8326 " with %<auto%> type specifier", name);
8327 return error_mark_node;
8330 type = splice_late_return_type
8331 (type, declarator->u.function.late_return_type);
8332 if (type == error_mark_node)
8333 return error_mark_node;
8335 if (ctype == NULL_TREE
8336 && decl_context == FIELD
8338 && (friendp == 0 || dname == current_class_name))
8339 ctype = current_class_type;
8341 if (ctype && (sfk == sfk_constructor
8342 || sfk == sfk_destructor))
8344 /* We are within a class's scope. If our declarator name
8345 is the same as the class name, and we are defining
8346 a function, then it is a constructor/destructor, and
8347 therefore returns a void type. */
8349 /* ISO C++ 12.4/2. A destructor may not be declared
8350 const or volatile. A destructor may not be
8353 ISO C++ 12.1. A constructor may not be declared
8354 const or volatile. A constructor may not be
8355 virtual. A constructor may not be static. */
8357 error ((flags == DTOR_FLAG)
8358 ? "destructor cannot be static member function"
8359 : "constructor cannot be static member function");
8362 error ((flags == DTOR_FLAG)
8363 ? "destructors may not be cv-qualified"
8364 : "constructors may not be cv-qualified");
8365 memfn_quals = TYPE_UNQUALIFIED;
8368 if (decl_context == FIELD
8369 && !member_function_or_else (ctype,
8372 return error_mark_node;
8374 if (flags != DTOR_FLAG)
8376 /* It's a constructor. */
8381 permerror (input_location, "constructors cannot be declared virtual");
8384 if (decl_context == FIELD
8385 && sfk != sfk_constructor)
8386 return error_mark_node;
8388 if (decl_context == FIELD)
8394 error ("can't initialize friend function %qs", name);
8397 /* Cannot be both friend and virtual. */
8398 error ("virtual functions cannot be friends");
8401 if (decl_context == NORMAL)
8402 error ("friend declaration not in class definition");
8403 if (current_function_decl && funcdef_flag)
8404 error ("can't define friend function %qs in a local "
8408 else if (ctype && sfk == sfk_conversion)
8412 maybe_warn_cpp0x ("explicit conversion operators");
8417 arg_types = grokparms (declarator->u.function.parameters,
8420 if (inner_declarator
8421 && inner_declarator->kind == cdk_id
8422 && inner_declarator->u.id.sfk == sfk_destructor
8423 && arg_types != void_list_node)
8425 error ("destructors may not have parameters");
8426 arg_types = void_list_node;
8430 type = build_function_type (type, arg_types);
8437 /* Filter out pointers-to-references and references-to-references.
8438 We can get these if a TYPE_DECL is used. */
8440 if (TREE_CODE (type) == REFERENCE_TYPE)
8442 if (declarator->kind != cdk_reference)
8444 error ("cannot declare pointer to %q#T", type);
8445 type = TREE_TYPE (type);
8448 /* In C++0x, we allow reference to reference declarations
8449 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8450 and template type arguments [14.3.1/4 temp.arg.type]. The
8451 check for direct reference to reference declarations, which
8452 are still forbidden, occurs below. Reasoning behind the change
8453 can be found in DR106, DR540, and the rvalue reference
8455 else if (cxx_dialect == cxx98)
8457 error ("cannot declare reference to %q#T", type);
8458 type = TREE_TYPE (type);
8461 else if (VOID_TYPE_P (type))
8463 if (declarator->kind == cdk_reference)
8464 error ("cannot declare reference to %q#T", type);
8465 else if (declarator->kind == cdk_ptrmem)
8466 error ("cannot declare pointer to %q#T member", type);
8469 /* We now know that the TYPE_QUALS don't apply to the decl,
8470 but to the target of the pointer. */
8471 type_quals = TYPE_UNQUALIFIED;
8473 if (declarator->kind == cdk_ptrmem
8474 && (TREE_CODE (type) == FUNCTION_TYPE
8475 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8477 memfn_quals |= cp_type_quals (type);
8478 type = build_memfn_type (type,
8479 declarator->u.pointer.class_type,
8481 memfn_quals = TYPE_UNQUALIFIED;
8484 if (TREE_CODE (type) == FUNCTION_TYPE
8485 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8486 error ("cannot declare %s to qualified function type %qT",
8487 declarator->kind == cdk_reference ? "reference" : "pointer",
8490 if (declarator->kind == cdk_reference)
8492 /* In C++0x, the type we are creating a reference to might be
8493 a typedef which is itself a reference type. In that case,
8494 we follow the reference collapsing rules in
8495 [7.1.3/8 dcl.typedef] to create the final reference type:
8497 "If a typedef TD names a type that is a reference to a type
8498 T, an attempt to create the type 'lvalue reference to cv TD'
8499 creates the type 'lvalue reference to T,' while an attempt
8500 to create the type "rvalue reference to cv TD' creates the
8503 if (!VOID_TYPE_P (type))
8504 type = cp_build_reference_type
8505 ((TREE_CODE (type) == REFERENCE_TYPE
8506 ? TREE_TYPE (type) : type),
8507 (declarator->u.reference.rvalue_ref
8508 && (TREE_CODE(type) != REFERENCE_TYPE
8509 || TYPE_REF_IS_RVALUE (type))));
8511 /* In C++0x, we need this check for direct reference to
8512 reference declarations, which are forbidden by
8513 [8.3.2/5 dcl.ref]. Reference to reference declarations
8514 are only allowed indirectly through typedefs and template
8515 type arguments. Example:
8517 void foo(int & &); // invalid ref-to-ref decl
8519 typedef int & int_ref;
8520 void foo(int_ref &); // valid ref-to-ref decl
8522 if (inner_declarator && inner_declarator->kind == cdk_reference)
8523 error ("cannot declare reference to %q#T, which is not "
8524 "a typedef or a template type argument", type);
8526 else if (TREE_CODE (type) == METHOD_TYPE)
8527 type = build_ptrmemfunc_type (build_pointer_type (type));
8528 else if (declarator->kind == cdk_ptrmem)
8530 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8532 if (declarator->u.pointer.class_type == error_mark_node)
8533 /* We will already have complained. */
8534 type = error_mark_node;
8536 type = build_ptrmem_type (declarator->u.pointer.class_type,
8540 type = build_pointer_type (type);
8542 /* Process a list of type modifier keywords (such as
8543 const or volatile) that were given inside the `*' or `&'. */
8545 if (declarator->u.pointer.qualifiers)
8548 = cp_build_qualified_type (type,
8549 declarator->u.pointer.qualifiers);
8550 type_quals = cp_type_quals (type);
8563 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8564 && TREE_CODE (type) != FUNCTION_TYPE
8565 && TREE_CODE (type) != METHOD_TYPE)
8567 error ("template-id %qD used as a declarator",
8569 unqualified_id = dname;
8572 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8573 qualified with a class-name, turn it into a METHOD_TYPE, unless
8574 we know that the function is static. We take advantage of this
8575 opportunity to do other processing that pertains to entities
8576 explicitly declared to be class members. Note that if DECLARATOR
8577 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8578 would not have exited the loop above. */
8580 && declarator->u.id.qualifying_scope
8581 && TYPE_P (declarator->u.id.qualifying_scope))
8585 ctype = declarator->u.id.qualifying_scope;
8586 ctype = TYPE_MAIN_VARIANT (ctype);
8588 while (t != NULL_TREE && CLASS_TYPE_P (t))
8590 /* You're supposed to have one `template <...>' for every
8591 template class, but you don't need one for a full
8592 specialization. For example:
8594 template <class T> struct S{};
8595 template <> struct S<int> { void f(); };
8596 void S<int>::f () {}
8598 is correct; there shouldn't be a `template <>' for the
8599 definition of `S<int>::f'. */
8600 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8601 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8602 /* T is an explicit (not partial) specialization. All
8603 containing classes must therefore also be explicitly
8606 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8607 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8608 template_count += 1;
8610 t = TYPE_MAIN_DECL (t);
8611 t = DECL_CONTEXT (t);
8614 if (ctype == current_class_type)
8618 permerror (input_location, "member functions are implicitly friends of their class");
8622 permerror (declarator->id_loc,
8623 "extra qualification %<%T::%> on member %qs",
8626 else if (/* If the qualifying type is already complete, then we
8627 can skip the following checks. */
8628 !COMPLETE_TYPE_P (ctype)
8629 && (/* If the function is being defined, then
8630 qualifying type must certainly be complete. */
8632 /* A friend declaration of "T::f" is OK, even if
8633 "T" is a template parameter. But, if this
8634 function is not a friend, the qualifying type
8636 || (!friendp && !CLASS_TYPE_P (ctype))
8637 /* For a declaration, the type need not be
8638 complete, if either it is dependent (since there
8639 is no meaningful definition of complete in that
8640 case) or the qualifying class is currently being
8642 || !(dependent_type_p (ctype)
8643 || currently_open_class (ctype)))
8644 /* Check that the qualifying type is complete. */
8645 && !complete_type_or_else (ctype, NULL_TREE))
8646 return error_mark_node;
8647 else if (TREE_CODE (type) == FUNCTION_TYPE)
8649 tree sname = declarator->u.id.unqualified_name;
8651 if (current_class_type
8652 && (!friendp || funcdef_flag))
8655 ? "cannot define member function %<%T::%s%> within %<%T%>"
8656 : "cannot declare member function %<%T::%s%> within %<%T%>",
8657 ctype, name, current_class_type);
8658 return error_mark_node;
8661 if (TREE_CODE (sname) == IDENTIFIER_NODE
8662 && NEW_DELETE_OPNAME_P (sname))
8663 /* Overloaded operator new and operator delete
8664 are always static functions. */
8667 type = build_memfn_type (type, ctype, memfn_quals);
8669 else if (declspecs->specs[(int)ds_typedef]
8670 && current_class_type)
8672 error ("cannot declare member %<%T::%s%> within %qT",
8673 ctype, name, current_class_type);
8674 return error_mark_node;
8678 /* Now TYPE has the actual type. */
8683 *attrlist = chainon (returned_attrs, *attrlist);
8685 attrlist = &returned_attrs;
8688 /* Handle parameter packs. */
8689 if (parameter_pack_p)
8691 if (decl_context == PARM)
8692 /* Turn the type into a pack expansion.*/
8693 type = make_pack_expansion (type);
8695 error ("non-parameter %qs cannot be a parameter pack", name);
8698 /* Did array size calculations overflow? */
8700 if (TREE_CODE (type) == ARRAY_TYPE
8701 && COMPLETE_TYPE_P (type)
8702 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8703 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8705 error ("size of array %qs is too large", name);
8706 /* If we proceed with the array type as it is, we'll eventually
8707 crash in tree_low_cst(). */
8708 type = error_mark_node;
8711 if ((decl_context == FIELD || decl_context == PARM)
8712 && !processing_template_decl
8713 && variably_modified_type_p (type, NULL_TREE))
8715 if (decl_context == FIELD)
8716 error ("data member may not have variably modified type %qT", type);
8718 error ("parameter may not have variably modified type %qT", type);
8719 type = error_mark_node;
8722 if (explicitp == 1 || (explicitp && friendp))
8724 /* [dcl.fct.spec] The explicit specifier shall only be used in
8725 declarations of constructors within a class definition. */
8726 error ("only declarations of constructors can be %<explicit%>");
8730 if (storage_class == sc_mutable)
8732 if (decl_context != FIELD || friendp)
8734 error ("non-member %qs cannot be declared %<mutable%>", name);
8735 storage_class = sc_none;
8737 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8739 error ("non-object member %qs cannot be declared %<mutable%>", name);
8740 storage_class = sc_none;
8742 else if (TREE_CODE (type) == FUNCTION_TYPE
8743 || TREE_CODE (type) == METHOD_TYPE)
8745 error ("function %qs cannot be declared %<mutable%>", name);
8746 storage_class = sc_none;
8750 error ("static %qs cannot be declared %<mutable%>", name);
8751 storage_class = sc_none;
8753 else if (type_quals & TYPE_QUAL_CONST)
8755 error ("const %qs cannot be declared %<mutable%>", name);
8756 storage_class = sc_none;
8760 /* If this is declaring a typedef name, return a TYPE_DECL. */
8761 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8765 /* Note that the grammar rejects storage classes
8766 in typenames, fields or parameters. */
8767 if (current_lang_name == lang_name_java)
8768 TYPE_FOR_JAVA (type) = 1;
8770 /* This declaration:
8772 typedef void f(int) const;
8774 declares a function type which is not a member of any
8775 particular class, but which is cv-qualified; for
8776 example "f S::*" declares a pointer to a const-qualified
8777 member function of S. We record the cv-qualification in the
8779 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8781 type = cp_build_qualified_type (type, memfn_quals);
8783 /* We have now dealt with these qualifiers. */
8784 memfn_quals = TYPE_UNQUALIFIED;
8787 if (decl_context == FIELD)
8788 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8790 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8791 if (id_declarator && declarator->u.id.qualifying_scope) {
8792 error_at (DECL_SOURCE_LOCATION (decl),
8793 "typedef name may not be a nested-name-specifier");
8794 TREE_TYPE (decl) = error_mark_node;
8797 if (decl_context != FIELD)
8799 if (!current_function_decl)
8800 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8801 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8802 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8803 (current_function_decl)))
8804 /* The TYPE_DECL is "abstract" because there will be
8805 clones of this constructor/destructor, and there will
8806 be copies of this TYPE_DECL generated in those
8808 DECL_ABSTRACT (decl) = 1;
8810 else if (constructor_name_p (unqualified_id, current_class_type))
8811 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8812 "as enclosing class",
8815 /* If the user declares "typedef struct {...} foo" then the
8816 struct will have an anonymous name. Fill that name in now.
8817 Nothing can refer to it, so nothing needs know about the name
8819 if (type != error_mark_node
8822 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8823 && TYPE_ANONYMOUS_P (type)
8824 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8828 /* Replace the anonymous name with the real name everywhere. */
8829 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8831 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8833 debug_hooks->set_name (t, decl);
8834 TYPE_NAME (t) = decl;
8838 if (TYPE_LANG_SPECIFIC (type))
8839 TYPE_WAS_ANONYMOUS (type) = 1;
8841 /* If this is a typedef within a template class, the nested
8842 type is a (non-primary) template. The name for the
8843 template needs updating as well. */
8844 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8845 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8846 = TYPE_IDENTIFIER (type);
8848 /* FIXME remangle member functions; member functions of a
8849 type with external linkage have external linkage. */
8853 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8854 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8856 bad_specifiers (decl, "type", virtualp,
8857 memfn_quals != TYPE_UNQUALIFIED,
8858 inlinep, friendp, raises != NULL_TREE);
8863 /* Detect the case of an array type of unspecified size
8864 which came, as such, direct from a typedef name.
8865 We must copy the type, so that the array's domain can be
8866 individually set by the object's initializer. */
8868 if (type && typedef_type
8869 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8870 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8871 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8873 /* Detect where we're using a typedef of function type to declare a
8874 function. PARMS will not be set, so we must create it now. */
8876 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8878 tree decls = NULL_TREE;
8881 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8883 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8885 TREE_CHAIN (decl) = decls;
8889 parms = nreverse (decls);
8891 if (decl_context != TYPENAME)
8893 /* A cv-qualifier-seq shall only be part of the function type
8894 for a non-static member function. [8.3.5/4 dcl.fct] */
8895 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8896 && (current_class_type == NULL_TREE || staticp) )
8899 ? G_("qualified function types cannot be used to "
8900 "declare static member functions")
8901 : G_("qualified function types cannot be used to "
8902 "declare free functions"));
8903 type = TYPE_MAIN_VARIANT (type);
8906 /* The qualifiers on the function type become the qualifiers on
8907 the non-static member function. */
8908 memfn_quals |= cp_type_quals (type);
8912 /* If this is a type name (such as, in a cast or sizeof),
8913 compute the type and return it now. */
8915 if (decl_context == TYPENAME)
8917 /* Note that the grammar rejects storage classes
8918 in typenames, fields or parameters. */
8919 if (type_quals != TYPE_UNQUALIFIED)
8920 type_quals = TYPE_UNQUALIFIED;
8922 /* Special case: "friend class foo" looks like a TYPENAME context. */
8925 if (type_quals != TYPE_UNQUALIFIED)
8927 error ("type qualifiers specified for friend class declaration");
8928 type_quals = TYPE_UNQUALIFIED;
8932 error ("%<inline%> specified for friend class declaration");
8938 /* Don't allow friend declaration without a class-key. */
8939 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8940 permerror (input_location, "template parameters cannot be friends");
8941 else if (TREE_CODE (type) == TYPENAME_TYPE)
8942 permerror (input_location, "friend declaration requires class-key, "
8943 "i.e. %<friend class %T::%D%>",
8944 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8946 permerror (input_location, "friend declaration requires class-key, "
8947 "i.e. %<friend %#T%>",
8951 /* Only try to do this stuff if we didn't already give up. */
8952 if (type != integer_type_node)
8954 /* A friendly class? */
8955 if (current_class_type)
8956 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8959 error ("trying to make class %qT a friend of global scope",
8962 type = void_type_node;
8965 else if (memfn_quals)
8967 if (ctype == NULL_TREE
8968 && TREE_CODE (type) == METHOD_TYPE)
8969 ctype = TYPE_METHOD_BASETYPE (type);
8972 type = build_memfn_type (type, ctype, memfn_quals);
8973 /* Core issue #547: need to allow this in template type args. */
8974 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8975 type = cp_build_qualified_type (type, memfn_quals);
8977 error ("invalid qualifiers on non-member function type");
8982 else if (unqualified_id == NULL_TREE && decl_context != PARM
8983 && decl_context != CATCHPARM
8984 && TREE_CODE (type) != UNION_TYPE
8987 error ("abstract declarator %qT used as declaration", type);
8988 return error_mark_node;
8991 /* Only functions may be declared using an operator-function-id. */
8993 && IDENTIFIER_OPNAME_P (unqualified_id)
8994 && TREE_CODE (type) != FUNCTION_TYPE
8995 && TREE_CODE (type) != METHOD_TYPE)
8997 error ("declaration of %qD as non-function", unqualified_id);
8998 return error_mark_node;
9001 /* We don't check parameter types here because we can emit a better
9002 error message later. */
9003 if (decl_context != PARM)
9005 type = check_var_type (unqualified_id, type);
9006 if (type == error_mark_node)
9007 return error_mark_node;
9010 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9011 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9013 if (decl_context == PARM || decl_context == CATCHPARM)
9015 if (ctype || in_namespace)
9016 error ("cannot use %<::%> in parameter declaration");
9018 /* A parameter declared as an array of T is really a pointer to T.
9019 One declared as a function is really a pointer to a function.
9020 One declared as a member is really a pointer to member. */
9022 if (TREE_CODE (type) == ARRAY_TYPE)
9024 /* Transfer const-ness of array into that of type pointed to. */
9025 type = build_pointer_type (TREE_TYPE (type));
9026 type_quals = TYPE_UNQUALIFIED;
9028 else if (TREE_CODE (type) == FUNCTION_TYPE)
9029 type = build_pointer_type (type);
9035 if (decl_context == PARM)
9037 decl = cp_build_parm_decl (unqualified_id, type);
9039 bad_specifiers (decl, "parameter", virtualp,
9040 memfn_quals != TYPE_UNQUALIFIED,
9041 inlinep, friendp, raises != NULL_TREE);
9043 else if (decl_context == FIELD)
9045 /* The C99 flexible array extension. */
9046 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9047 && TYPE_DOMAIN (type) == NULL_TREE)
9049 tree itype = compute_array_index_type (dname, integer_zero_node);
9050 type = build_cplus_array_type (TREE_TYPE (type), itype);
9053 if (type == error_mark_node)
9055 /* Happens when declaring arrays of sizes which
9056 are error_mark_node, for example. */
9059 else if (in_namespace && !friendp)
9061 /* Something like struct S { int N::j; }; */
9062 error ("invalid use of %<::%>");
9063 return error_mark_node;
9065 else if (TREE_CODE (type) == FUNCTION_TYPE)
9068 tree function_context;
9072 if (ctype == NULL_TREE)
9073 ctype = current_class_type;
9075 if (ctype == NULL_TREE)
9077 error ("can't make %qD into a method -- not in a class",
9079 return error_mark_node;
9082 /* ``A union may [ ... ] not [ have ] virtual functions.''
9084 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9086 error ("function %qD declared virtual inside a union",
9088 return error_mark_node;
9091 if (NEW_DELETE_OPNAME_P (unqualified_id))
9095 error ("%qD cannot be declared virtual, since it "
9101 else if (staticp < 2)
9102 type = build_memfn_type (type, ctype, memfn_quals);
9105 /* Check that the name used for a destructor makes sense. */
9106 if (sfk == sfk_destructor)
9108 tree uqname = id_declarator->u.id.unqualified_name;
9112 gcc_assert (friendp);
9113 error ("expected qualified name in friend declaration "
9114 "for destructor %qD", uqname);
9115 return error_mark_node;
9118 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9120 error ("declaration of %qD as member of %qT",
9122 return error_mark_node;
9125 else if (sfk == sfk_constructor && friendp)
9127 error ("expected qualified name in friend declaration "
9128 "for constructor %qD",
9129 id_declarator->u.id.unqualified_name);
9130 return error_mark_node;
9133 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9134 function_context = (ctype != NULL_TREE) ?
9135 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9136 publicp = (! friendp || ! staticp)
9137 && function_context == NULL_TREE;
9138 decl = grokfndecl (ctype, type,
9139 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9140 ? unqualified_id : dname,
9143 virtualp, flags, memfn_quals, raises,
9144 friendp ? -1 : 0, friendp, publicp, inlinep,
9146 funcdef_flag, template_count, in_namespace,
9147 attrlist, declarator->id_loc);
9148 if (decl == NULL_TREE)
9149 return error_mark_node;
9151 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9152 /* The decl and setting of decl_attr is also turned off. */
9153 decl = build_decl_attribute_variant (decl, decl_attr);
9156 /* [class.conv.ctor]
9158 A constructor declared without the function-specifier
9159 explicit that can be called with a single parameter
9160 specifies a conversion from the type of its first
9161 parameter to the type of its class. Such a constructor
9162 is called a converting constructor. */
9164 DECL_NONCONVERTING_P (decl) = 1;
9166 else if (TREE_CODE (type) == METHOD_TYPE)
9168 /* We only get here for friend declarations of
9169 members of other classes. */
9170 /* All method decls are public, so tell grokfndecl to set
9171 TREE_PUBLIC, also. */
9172 decl = grokfndecl (ctype, type,
9173 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9174 ? unqualified_id : dname,
9177 virtualp, flags, memfn_quals, raises,
9178 friendp ? -1 : 0, friendp, 1, 0, sfk,
9179 funcdef_flag, template_count, in_namespace,
9181 declarator->id_loc);
9182 if (decl == NULL_TREE)
9183 return error_mark_node;
9185 else if (!staticp && !dependent_type_p (type)
9186 && !COMPLETE_TYPE_P (complete_type (type))
9187 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9190 error ("field %qD has incomplete type", unqualified_id);
9192 error ("name %qT has incomplete type", type);
9194 /* If we're instantiating a template, tell them which
9195 instantiation made the field's type be incomplete. */
9196 if (current_class_type
9197 && TYPE_NAME (current_class_type)
9198 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9200 && declspecs->type == type)
9201 error (" in instantiation of template %qT",
9202 current_class_type);
9204 return error_mark_node;
9210 error ("%qE is neither function nor member function; "
9211 "cannot be declared friend", unqualified_id);
9219 /* Friends are treated specially. */
9220 if (ctype == current_class_type)
9221 ; /* We already issued a permerror. */
9222 else if (decl && DECL_NAME (decl))
9224 if (template_class_depth (current_class_type) == 0)
9226 decl = check_explicit_specialization
9227 (unqualified_id, decl, template_count,
9228 2 * funcdef_flag + 4);
9229 if (decl == error_mark_node)
9230 return error_mark_node;
9233 decl = do_friend (ctype, unqualified_id, decl,
9239 return error_mark_node;
9242 /* Structure field. It may not be a function, except for C++. */
9244 if (decl == NULL_TREE)
9250 /* An attempt is being made to initialize a non-static
9251 member. But, from [class.mem]:
9253 4 A member-declarator can contain a
9254 constant-initializer only if it declares a static
9255 member (_class.static_) of integral or enumeration
9256 type, see _class.static.data_.
9258 This used to be relatively common practice, but
9259 the rest of the compiler does not correctly
9260 handle the initialization unless the member is
9261 static so we make it static below. */
9262 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9264 permerror (input_location, "making %qD static", unqualified_id);
9268 if (uses_template_parms (type))
9269 /* We'll check at instantiation time. */
9271 else if (check_static_variable_definition (unqualified_id,
9273 /* If we just return the declaration, crashes
9274 will sometimes occur. We therefore return
9275 void_type_node, as if this was a friend
9276 declaration, to cause callers to completely
9277 ignore this declaration. */
9278 return error_mark_node;
9283 /* C++ allows static class members. All other work
9284 for this is done by grokfield. */
9285 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9286 set_linkage_for_static_data_member (decl);
9287 /* Even if there is an in-class initialization, DECL
9288 is considered undefined until an out-of-class
9289 definition is provided. */
9290 DECL_EXTERNAL (decl) = 1;
9293 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9297 decl = build_decl (input_location,
9298 FIELD_DECL, unqualified_id, type);
9299 DECL_NONADDRESSABLE_P (decl) = bitfield;
9300 if (bitfield && !unqualified_id)
9301 TREE_NO_WARNING (decl) = 1;
9303 if (storage_class == sc_mutable)
9305 DECL_MUTABLE_P (decl) = 1;
9306 storage_class = sc_none;
9310 bad_specifiers (decl, "field", virtualp,
9311 memfn_quals != TYPE_UNQUALIFIED,
9312 inlinep, friendp, raises != NULL_TREE);
9315 else if (TREE_CODE (type) == FUNCTION_TYPE
9316 || TREE_CODE (type) == METHOD_TYPE)
9321 if (!unqualified_id)
9322 return error_mark_node;
9324 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9325 original_name = dname;
9327 original_name = unqualified_id;
9329 if (storage_class == sc_auto)
9330 error ("storage class %<auto%> invalid for function %qs", name);
9331 else if (storage_class == sc_register)
9332 error ("storage class %<register%> invalid for function %qs", name);
9334 error ("storage class %<__thread%> invalid for function %qs", name);
9336 /* Function declaration not at top level.
9337 Storage classes other than `extern' are not allowed
9338 and `extern' makes no difference. */
9339 if (! toplevel_bindings_p ()
9340 && (storage_class == sc_static
9341 || declspecs->specs[(int)ds_inline])
9344 if (storage_class == sc_static)
9345 pedwarn (input_location, OPT_pedantic,
9346 "%<static%> specified invalid for function %qs "
9347 "declared out of global scope", name);
9349 pedwarn (input_location, OPT_pedantic,
9350 "%<inline%> specifier invalid for function %qs "
9351 "declared out of global scope", name);
9354 if (ctype != NULL_TREE
9355 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9357 error ("%q#T is not a class or a namespace", ctype);
9361 if (ctype == NULL_TREE)
9365 error ("virtual non-class function %qs", name);
9368 else if (sfk == sfk_constructor
9369 || sfk == sfk_destructor)
9372 ? "%qs defined in a non-class scope"
9373 : "%qs declared in a non-class scope", name);
9377 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9378 && !NEW_DELETE_OPNAME_P (original_name))
9379 type = build_method_type_directly (ctype,
9381 TYPE_ARG_TYPES (type));
9383 /* Record presence of `static'. */
9384 publicp = (ctype != NULL_TREE
9385 || storage_class == sc_extern
9386 || storage_class != sc_static);
9388 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9389 virtualp, flags, memfn_quals, raises,
9391 publicp, inlinep, sfk, funcdef_flag,
9392 template_count, in_namespace, attrlist,
9393 declarator->id_loc);
9394 if (decl == NULL_TREE)
9395 return error_mark_node;
9399 int invalid_static = 0;
9401 /* Don't allow a static member function in a class, and forbid
9402 declaring main to be static. */
9403 if (TREE_CODE (type) == METHOD_TYPE)
9405 permerror (input_location, "cannot declare member function %qD to have "
9406 "static linkage", decl);
9409 else if (current_function_decl)
9411 /* FIXME need arm citation */
9412 error ("cannot declare static function inside another function");
9419 storage_class = sc_none;
9425 /* It's a variable. */
9427 /* An uninitialized decl with `extern' is a reference. */
9428 decl = grokvardecl (type, unqualified_id,
9431 (type_quals & TYPE_QUAL_CONST) != 0,
9432 ctype ? ctype : in_namespace);
9433 bad_specifiers (decl, "variable", virtualp,
9434 memfn_quals != TYPE_UNQUALIFIED,
9435 inlinep, friendp, raises != NULL_TREE);
9439 DECL_CONTEXT (decl) = ctype;
9442 permerror (input_location, "%<static%> may not be used when defining "
9443 "(as opposed to declaring) a static data member");
9445 storage_class = sc_none;
9447 if (storage_class == sc_register && TREE_STATIC (decl))
9449 error ("static member %qD declared %<register%>", decl);
9450 storage_class = sc_none;
9452 if (storage_class == sc_extern && pedantic)
9454 pedwarn (input_location, OPT_pedantic,
9455 "cannot explicitly declare member %q#D to have "
9456 "extern linkage", decl);
9457 storage_class = sc_none;
9462 if (storage_class == sc_extern && initialized && !funcdef_flag)
9464 if (toplevel_bindings_p ())
9466 /* It's common practice (and completely valid) to have a const
9467 be initialized and declared extern. */
9468 if (!(type_quals & TYPE_QUAL_CONST))
9469 warning (0, "%qs initialized and declared %<extern%>", name);
9473 error ("%qs has both %<extern%> and initializer", name);
9474 return error_mark_node;
9478 /* Record `register' declaration for warnings on &
9479 and in case doing stupid register allocation. */
9481 if (storage_class == sc_register)
9482 DECL_REGISTER (decl) = 1;
9483 else if (storage_class == sc_extern)
9484 DECL_THIS_EXTERN (decl) = 1;
9485 else if (storage_class == sc_static)
9486 DECL_THIS_STATIC (decl) = 1;
9488 /* Record constancy and volatility on the DECL itself . There's
9489 no need to do this when processing a template; we'll do this
9490 for the instantiated declaration based on the type of DECL. */
9491 if (!processing_template_decl)
9492 cp_apply_type_quals_to_decl (type_quals, decl);
9498 /* Subroutine of start_function. Ensure that each of the parameter
9499 types (as listed in PARMS) is complete, as is required for a
9500 function definition. */
9503 require_complete_types_for_parms (tree parms)
9505 for (; parms; parms = TREE_CHAIN (parms))
9507 if (dependent_type_p (TREE_TYPE (parms)))
9509 if (!VOID_TYPE_P (TREE_TYPE (parms))
9510 && complete_type_or_else (TREE_TYPE (parms), parms))
9512 relayout_decl (parms);
9513 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9516 /* grokparms or complete_type_or_else will have already issued
9518 TREE_TYPE (parms) = error_mark_node;
9522 /* Returns nonzero if T is a local variable. */
9525 local_variable_p (const_tree t)
9527 if ((TREE_CODE (t) == VAR_DECL
9528 /* A VAR_DECL with a context that is a _TYPE is a static data
9530 && !TYPE_P (CP_DECL_CONTEXT (t))
9531 /* Any other non-local variable must be at namespace scope. */
9532 && !DECL_NAMESPACE_SCOPE_P (t))
9533 || (TREE_CODE (t) == PARM_DECL))
9539 /* Like local_variable_p, but suitable for use as a tree-walking
9543 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9544 void *data ATTRIBUTE_UNUSED)
9546 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9548 else if (TYPE_P (*tp))
9555 /* Check that ARG, which is a default-argument expression for a
9556 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9557 something goes wrong. DECL may also be a _TYPE node, rather than a
9558 DECL, if there is no DECL available. */
9561 check_default_argument (tree decl, tree arg)
9566 if (TREE_CODE (arg) == DEFAULT_ARG)
9567 /* We get a DEFAULT_ARG when looking at an in-class declaration
9568 with a default argument. Ignore the argument for now; we'll
9569 deal with it after the class is complete. */
9578 decl_type = TREE_TYPE (decl);
9580 if (arg == error_mark_node
9581 || decl == error_mark_node
9582 || TREE_TYPE (arg) == error_mark_node
9583 || decl_type == error_mark_node)
9584 /* Something already went wrong. There's no need to check
9586 return error_mark_node;
9588 /* [dcl.fct.default]
9590 A default argument expression is implicitly converted to the
9592 if (!TREE_TYPE (arg)
9593 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9596 error ("default argument for %q#D has type %qT",
9597 decl, TREE_TYPE (arg));
9599 error ("default argument for parameter of type %qT has type %qT",
9600 decl_type, TREE_TYPE (arg));
9602 return error_mark_node;
9605 /* [dcl.fct.default]
9607 Local variables shall not be used in default argument
9610 The keyword `this' shall not be used in a default argument of a
9612 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9615 error ("default argument %qE uses local variable %qD", arg, var);
9616 return error_mark_node;
9623 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9626 type_is_deprecated (tree type)
9628 enum tree_code code;
9629 if (TREE_DEPRECATED (type))
9631 if (TYPE_NAME (type)
9632 && TREE_DEPRECATED (TYPE_NAME (type)))
9635 code = TREE_CODE (type);
9637 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9638 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9639 || code == METHOD_TYPE || code == ARRAY_TYPE)
9640 return type_is_deprecated (TREE_TYPE (type));
9642 if (TYPE_PTRMEMFUNC_P (type))
9643 return type_is_deprecated
9644 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9649 /* Decode the list of parameter types for a function type.
9650 Given the list of things declared inside the parens,
9651 return a list of types.
9653 If this parameter does not end with an ellipsis, we append
9656 *PARMS is set to the chain of PARM_DECLs created. */
9659 grokparms (tree parmlist, tree *parms)
9661 tree result = NULL_TREE;
9662 tree decls = NULL_TREE;
9666 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9668 tree type = NULL_TREE;
9669 tree init = TREE_PURPOSE (parm);
9670 tree decl = TREE_VALUE (parm);
9673 if (parm == void_list_node)
9676 if (! decl || TREE_TYPE (decl) == error_mark_node)
9679 type = TREE_TYPE (decl);
9680 if (VOID_TYPE_P (type))
9682 if (same_type_p (type, void_type_node)
9683 && DECL_SELF_REFERENCE_P (type)
9684 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9685 /* this is a parmlist of `(void)', which is ok. */
9687 cxx_incomplete_type_error (decl, type);
9688 /* It's not a good idea to actually create parameters of
9689 type `void'; other parts of the compiler assume that a
9690 void type terminates the parameter list. */
9691 type = error_mark_node;
9692 TREE_TYPE (decl) = error_mark_node;
9695 if (type != error_mark_node
9696 && TYPE_FOR_JAVA (type)
9697 && MAYBE_CLASS_TYPE_P (type))
9699 error ("parameter %qD has Java class type", decl);
9700 type = error_mark_node;
9701 TREE_TYPE (decl) = error_mark_node;
9705 if (type != error_mark_node
9706 && (errmsg = targetm.invalid_parameter_type (type)))
9709 type = error_mark_node;
9710 TREE_TYPE (decl) = error_mark_node;
9713 if (type != error_mark_node)
9715 if (deprecated_state != DEPRECATED_SUPPRESS)
9717 tree deptype = type_is_deprecated (type);
9719 warn_deprecated_use (deptype, NULL_TREE);
9722 /* Top-level qualifiers on the parameters are
9723 ignored for function types. */
9724 type = cp_build_qualified_type (type, 0);
9725 if (TREE_CODE (type) == METHOD_TYPE)
9727 error ("parameter %qD invalidly declared method type", decl);
9728 type = build_pointer_type (type);
9729 TREE_TYPE (decl) = type;
9731 else if (abstract_virtuals_error (decl, type))
9732 any_error = 1; /* Seems like a good idea. */
9733 else if (POINTER_TYPE_P (type))
9735 /* [dcl.fct]/6, parameter types cannot contain pointers
9736 (references) to arrays of unknown bound. */
9737 tree t = TREE_TYPE (type);
9738 int ptr = TYPE_PTR_P (type);
9744 else if (TREE_CODE (t) != ARRAY_TYPE)
9746 else if (!TYPE_DOMAIN (t))
9750 if (TREE_CODE (t) == ARRAY_TYPE)
9751 error ("parameter %qD includes %s to array of unknown "
9753 decl, ptr ? "pointer" : "reference", t);
9758 else if (init && !processing_template_decl)
9759 init = check_default_argument (decl, init);
9762 if (TREE_CODE (decl) == PARM_DECL
9763 && FUNCTION_PARAMETER_PACK_P (decl)
9764 && TREE_CHAIN (parm)
9765 && TREE_CHAIN (parm) != void_list_node)
9766 error ("parameter packs must be at the end of the parameter list");
9768 TREE_CHAIN (decl) = decls;
9770 result = tree_cons (init, type, result);
9772 decls = nreverse (decls);
9773 result = nreverse (result);
9775 result = chainon (result, void_list_node);
9782 /* D is a constructor or overloaded `operator='.
9784 Let T be the class in which D is declared. Then, this function
9787 -1 if D's is an ill-formed constructor or copy assignment operator
9788 whose first parameter is of type `T'.
9789 0 if D is not a copy constructor or copy assignment
9791 1 if D is a copy constructor or copy assignment operator whose
9792 first parameter is a reference to const qualified T.
9793 2 if D is a copy constructor or copy assignment operator whose
9794 first parameter is a reference to non-const qualified T.
9796 This function can be used as a predicate. Positive values indicate
9797 a copy constructor and nonzero values indicate a copy assignment
9801 copy_fn_p (const_tree d)
9807 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9809 if (TREE_CODE (d) == TEMPLATE_DECL
9810 || (DECL_TEMPLATE_INFO (d)
9811 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9812 /* Instantiations of template member functions are never copy
9813 functions. Note that member functions of templated classes are
9814 represented as template functions internally, and we must
9815 accept those as copy functions. */
9818 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9822 arg_type = TREE_VALUE (args);
9823 if (arg_type == error_mark_node)
9826 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9828 /* Pass by value copy assignment operator. */
9831 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9832 && !TYPE_REF_IS_RVALUE (arg_type)
9833 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9835 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9841 args = TREE_CHAIN (args);
9843 if (args && args != void_list_node && !TREE_PURPOSE (args))
9844 /* There are more non-optional args. */
9850 /* D is a constructor or overloaded `operator='.
9852 Let T be the class in which D is declared. Then, this function
9853 returns true when D is a move constructor or move assignment
9854 operator, false otherwise. */
9857 move_fn_p (const_tree d)
9861 bool result = false;
9863 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9865 if (cxx_dialect == cxx98)
9866 /* There are no move constructors if we are in C++98 mode. */
9869 if (TREE_CODE (d) == TEMPLATE_DECL
9870 || (DECL_TEMPLATE_INFO (d)
9871 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9872 /* Instantiations of template member functions are never copy
9873 functions. Note that member functions of templated classes are
9874 represented as template functions internally, and we must
9875 accept those as copy functions. */
9878 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9882 arg_type = TREE_VALUE (args);
9883 if (arg_type == error_mark_node)
9886 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9887 && TYPE_REF_IS_RVALUE (arg_type)
9888 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9892 args = TREE_CHAIN (args);
9894 if (args && args != void_list_node && !TREE_PURPOSE (args))
9895 /* There are more non-optional args. */
9901 /* Remember any special properties of member function DECL. */
9904 grok_special_member_properties (tree decl)
9908 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9911 class_type = DECL_CONTEXT (decl);
9912 if (DECL_CONSTRUCTOR_P (decl))
9914 int ctor = copy_fn_p (decl);
9916 if (!DECL_ARTIFICIAL (decl))
9917 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9923 A non-template constructor for class X is a copy
9924 constructor if its first parameter is of type X&, const
9925 X&, volatile X& or const volatile X&, and either there
9926 are no other parameters or else all other parameters have
9927 default arguments. */
9928 TYPE_HAS_INIT_REF (class_type) = 1;
9929 if (!DECL_DEFAULTED_FN (decl))
9930 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9932 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9934 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9936 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9937 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9938 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9940 else if (is_list_ctor (decl))
9941 TYPE_HAS_LIST_CTOR (class_type) = 1;
9943 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9947 A non-template assignment operator for class X is a copy
9948 assignment operator if its parameter is of type X, X&, const
9949 X&, volatile X& or const volatile X&. */
9951 int assop = copy_fn_p (decl);
9955 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9956 if (!DECL_DEFAULTED_FN (decl))
9957 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9959 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9964 /* Check a constructor DECL has the correct form. Complains
9965 if the class has a constructor of the form X(X). */
9968 grok_ctor_properties (const_tree ctype, const_tree decl)
9970 int ctor_parm = copy_fn_p (decl);
9976 A declaration of a constructor for a class X is ill-formed if
9977 its first parameter is of type (optionally cv-qualified) X
9978 and either there are no other parameters or else all other
9979 parameters have default arguments.
9981 We *don't* complain about member template instantiations that
9982 have this form, though; they can occur as we try to decide
9983 what constructor to use during overload resolution. Since
9984 overload resolution will never prefer such a constructor to
9985 the non-template copy constructor (which is either explicitly
9986 or implicitly defined), there's no need to worry about their
9987 existence. Theoretically, they should never even be
9988 instantiated, but that's hard to forestall. */
9989 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9997 /* An operator with this code is unary, but can also be binary. */
10000 ambi_op_p (enum tree_code code)
10002 return (code == INDIRECT_REF
10003 || code == ADDR_EXPR
10004 || code == UNARY_PLUS_EXPR
10005 || code == NEGATE_EXPR
10006 || code == PREINCREMENT_EXPR
10007 || code == PREDECREMENT_EXPR);
10010 /* An operator with this name can only be unary. */
10013 unary_op_p (enum tree_code code)
10015 return (code == TRUTH_NOT_EXPR
10016 || code == BIT_NOT_EXPR
10017 || code == COMPONENT_REF
10018 || code == TYPE_EXPR);
10021 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10022 errors are issued for invalid declarations. */
10025 grok_op_properties (tree decl, bool complain)
10027 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10029 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10030 tree name = DECL_NAME (decl);
10031 enum tree_code operator_code;
10036 /* Count the number of arguments and check for ellipsis. */
10037 for (argtype = argtypes, arity = 0;
10038 argtype && argtype != void_list_node;
10039 argtype = TREE_CHAIN (argtype))
10041 ellipsis_p = !argtype;
10043 class_type = DECL_CONTEXT (decl);
10044 if (class_type && !CLASS_TYPE_P (class_type))
10045 class_type = NULL_TREE;
10047 if (DECL_CONV_FN_P (decl))
10048 operator_code = TYPE_EXPR;
10052 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10053 if (ansi_opname (CODE) == name) \
10055 operator_code = (CODE); \
10058 else if (ansi_assopname (CODE) == name) \
10060 operator_code = (CODE); \
10061 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10065 #include "operators.def"
10066 #undef DEF_OPERATOR
10068 gcc_unreachable ();
10071 gcc_assert (operator_code != MAX_TREE_CODES);
10072 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10075 switch (operator_code)
10078 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10082 TYPE_GETS_DELETE (class_type) |= 1;
10086 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10089 case VEC_DELETE_EXPR:
10090 TYPE_GETS_DELETE (class_type) |= 2;
10097 /* [basic.std.dynamic.allocation]/1:
10099 A program is ill-formed if an allocation function is declared
10100 in a namespace scope other than global scope or declared static
10103 The same also holds true for deallocation functions. */
10104 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10105 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10107 if (DECL_NAMESPACE_SCOPE_P (decl))
10109 if (CP_DECL_CONTEXT (decl) != global_namespace)
10111 error ("%qD may not be declared within a namespace", decl);
10114 else if (!TREE_PUBLIC (decl))
10116 error ("%qD may not be declared as static", decl);
10122 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10124 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10125 DECL_IS_OPERATOR_NEW (decl) = 1;
10127 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10128 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10131 /* An operator function must either be a non-static member function
10132 or have at least one parameter of a class, a reference to a class,
10133 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10134 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10136 if (operator_code == TYPE_EXPR
10137 || operator_code == CALL_EXPR
10138 || operator_code == COMPONENT_REF
10139 || operator_code == ARRAY_REF
10140 || operator_code == NOP_EXPR)
10142 error ("%qD must be a nonstatic member function", decl);
10149 if (DECL_STATIC_FUNCTION_P (decl))
10151 error ("%qD must be either a non-static member "
10152 "function or a non-member function", decl);
10156 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10158 tree arg = non_reference (TREE_VALUE (p));
10159 if (arg == error_mark_node)
10162 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10163 because these checks are performed even on
10164 template functions. */
10165 if (MAYBE_CLASS_TYPE_P (arg)
10166 || TREE_CODE (arg) == ENUMERAL_TYPE)
10170 if (!p || p == void_list_node)
10173 error ("%qD must have an argument of class or "
10174 "enumerated type", decl);
10180 /* There are no restrictions on the arguments to an overloaded
10182 if (operator_code == CALL_EXPR)
10185 /* Warn about conversion operators that will never be used. */
10186 if (IDENTIFIER_TYPENAME_P (name)
10187 && ! DECL_TEMPLATE_INFO (decl)
10189 /* Warn only declaring the function; there is no need to
10190 warn again about out-of-class definitions. */
10191 && class_type == current_class_type)
10193 tree t = TREE_TYPE (name);
10194 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10195 const char *what = 0;
10198 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10200 if (TREE_CODE (t) == VOID_TYPE)
10202 else if (class_type)
10204 if (t == class_type)
10205 what = "the same type";
10206 /* Don't force t to be complete here. */
10207 else if (MAYBE_CLASS_TYPE_P (t)
10208 && COMPLETE_TYPE_P (t)
10209 && DERIVED_FROM_P (t, class_type))
10210 what = "a base class";
10214 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10215 "conversion operator",
10216 ref ? "a reference to " : "", what);
10219 if (operator_code == COND_EXPR)
10222 error ("ISO C++ prohibits overloading operator ?:");
10225 else if (ellipsis_p)
10227 error ("%qD must not have variable number of arguments", decl);
10230 else if (ambi_op_p (operator_code))
10233 /* We pick the one-argument operator codes by default, so
10234 we don't have to change anything. */
10236 else if (arity == 2)
10238 /* If we thought this was a unary operator, we now know
10239 it to be a binary operator. */
10240 switch (operator_code)
10243 operator_code = MULT_EXPR;
10247 operator_code = BIT_AND_EXPR;
10250 case UNARY_PLUS_EXPR:
10251 operator_code = PLUS_EXPR;
10255 operator_code = MINUS_EXPR;
10258 case PREINCREMENT_EXPR:
10259 operator_code = POSTINCREMENT_EXPR;
10262 case PREDECREMENT_EXPR:
10263 operator_code = POSTDECREMENT_EXPR;
10267 gcc_unreachable ();
10270 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10272 if ((operator_code == POSTINCREMENT_EXPR
10273 || operator_code == POSTDECREMENT_EXPR)
10274 && ! processing_template_decl
10275 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10278 error ("postfix %qD must take %<int%> as its argument",
10281 error ("postfix %qD must take %<int%> as its second "
10289 error ("%qD must take either zero or one argument", decl);
10291 error ("%qD must take either one or two arguments", decl);
10295 /* More Effective C++ rule 6. */
10297 && (operator_code == POSTINCREMENT_EXPR
10298 || operator_code == POSTDECREMENT_EXPR
10299 || operator_code == PREINCREMENT_EXPR
10300 || operator_code == PREDECREMENT_EXPR))
10302 tree arg = TREE_VALUE (argtypes);
10303 tree ret = TREE_TYPE (TREE_TYPE (decl));
10304 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10305 arg = TREE_TYPE (arg);
10306 arg = TYPE_MAIN_VARIANT (arg);
10307 if (operator_code == PREINCREMENT_EXPR
10308 || operator_code == PREDECREMENT_EXPR)
10310 if (TREE_CODE (ret) != REFERENCE_TYPE
10311 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10313 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10314 build_reference_type (arg));
10318 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10319 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10323 else if (unary_op_p (operator_code))
10328 error ("%qD must take %<void%>", decl);
10330 error ("%qD must take exactly one argument", decl);
10334 else /* if (binary_op_p (operator_code)) */
10339 error ("%qD must take exactly one argument", decl);
10341 error ("%qD must take exactly two arguments", decl);
10345 /* More Effective C++ rule 7. */
10347 && (operator_code == TRUTH_ANDIF_EXPR
10348 || operator_code == TRUTH_ORIF_EXPR
10349 || operator_code == COMPOUND_EXPR))
10350 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10354 /* Effective C++ rule 23. */
10357 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10358 && (operator_code == PLUS_EXPR
10359 || operator_code == MINUS_EXPR
10360 || operator_code == TRUNC_DIV_EXPR
10361 || operator_code == MULT_EXPR
10362 || operator_code == TRUNC_MOD_EXPR)
10363 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10364 warning (OPT_Weffc__, "%qD should return by value", decl);
10366 /* [over.oper]/8 */
10367 for (; argtypes && argtypes != void_list_node;
10368 argtypes = TREE_CHAIN (argtypes))
10369 if (TREE_PURPOSE (argtypes))
10371 TREE_PURPOSE (argtypes) = NULL_TREE;
10372 if (operator_code == POSTINCREMENT_EXPR
10373 || operator_code == POSTDECREMENT_EXPR)
10375 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10380 error ("%qD cannot have default arguments", decl);
10388 /* Return a string giving the keyword associate with CODE. */
10390 static const char *
10391 tag_name (enum tag_types code)
10403 case typename_type:
10406 gcc_unreachable ();
10410 /* Name lookup in an elaborated-type-specifier (after the keyword
10411 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10412 elaborated-type-specifier is invalid, issue a diagnostic and return
10413 error_mark_node; otherwise, return the *_TYPE to which it referred.
10414 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10417 check_elaborated_type_specifier (enum tag_types tag_code,
10419 bool allow_template_p)
10425 struct S { struct S *p; };
10427 name lookup will find the TYPE_DECL for the implicit "S::S"
10428 typedef. Adjust for that here. */
10429 if (DECL_SELF_REFERENCE_P (decl))
10430 decl = TYPE_NAME (TREE_TYPE (decl));
10432 type = TREE_TYPE (decl);
10434 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10435 is false for this case as well. */
10436 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10438 error ("using template type parameter %qT after %qs",
10439 type, tag_name (tag_code));
10440 return error_mark_node;
10444 If the identifier resolves to a typedef-name or a template
10445 type-parameter, the elaborated-type-specifier is ill-formed.
10447 In other words, the only legitimate declaration to use in the
10448 elaborated type specifier is the implicit typedef created when
10449 the type is declared. */
10450 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10451 && tag_code != typename_type)
10453 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10454 error ("%q+D has a previous declaration here", decl);
10455 return error_mark_node;
10457 else if (TREE_CODE (type) != RECORD_TYPE
10458 && TREE_CODE (type) != UNION_TYPE
10459 && tag_code != enum_type
10460 && tag_code != typename_type)
10462 error ("%qT referred to as %qs", type, tag_name (tag_code));
10463 error ("%q+T has a previous declaration here", type);
10464 return error_mark_node;
10466 else if (TREE_CODE (type) != ENUMERAL_TYPE
10467 && tag_code == enum_type)
10469 error ("%qT referred to as enum", type);
10470 error ("%q+T has a previous declaration here", type);
10471 return error_mark_node;
10473 else if (!allow_template_p
10474 && TREE_CODE (type) == RECORD_TYPE
10475 && CLASSTYPE_IS_TEMPLATE (type))
10477 /* If a class template appears as elaborated type specifier
10478 without a template header such as:
10480 template <class T> class C {};
10481 void f(class C); // No template header here
10483 then the required template argument is missing. */
10484 error ("template argument required for %<%s %T%>",
10485 tag_name (tag_code),
10486 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10487 return error_mark_node;
10493 /* Lookup NAME in elaborate type specifier in scope according to
10494 SCOPE and issue diagnostics if necessary.
10495 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10496 found, and ERROR_MARK_NODE for type error. */
10499 lookup_and_check_tag (enum tag_types tag_code, tree name,
10500 tag_scope scope, bool template_header_p)
10504 if (scope == ts_global)
10506 /* First try ordinary name lookup, ignoring hidden class name
10507 injected via friend declaration. */
10508 decl = lookup_name_prefer_type (name, 2);
10509 /* If that fails, the name will be placed in the smallest
10510 non-class, non-function-prototype scope according to 3.3.1/5.
10511 We may already have a hidden name declared as friend in this
10512 scope. So lookup again but not ignoring hidden names.
10513 If we find one, that name will be made visible rather than
10514 creating a new tag. */
10516 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10519 decl = lookup_type_scope (name, scope);
10521 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10522 decl = DECL_TEMPLATE_RESULT (decl);
10524 if (decl && TREE_CODE (decl) == TYPE_DECL)
10526 /* Look for invalid nested type:
10530 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10532 error ("%qD has the same name as the class in which it is "
10535 return error_mark_node;
10538 /* Two cases we need to consider when deciding if a class
10539 template is allowed as an elaborated type specifier:
10540 1. It is a self reference to its own class.
10541 2. It comes with a template header.
10545 template <class T> class C {
10546 class C *c1; // DECL_SELF_REFERENCE_P is true
10549 template <class U> class C; // template_header_p is true
10550 template <class T> class C<T>::D {
10551 class C *c2; // DECL_SELF_REFERENCE_P is true
10554 t = check_elaborated_type_specifier (tag_code,
10557 | DECL_SELF_REFERENCE_P (decl));
10560 else if (decl && TREE_CODE (decl) == TREE_LIST)
10562 error ("reference to %qD is ambiguous", name);
10563 print_candidates (decl);
10564 return error_mark_node;
10570 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10571 Define the tag as a forward-reference if it is not defined.
10573 If a declaration is given, process it here, and report an error if
10574 multiple declarations are not identical.
10576 SCOPE is TS_CURRENT when this is also a definition. Only look in
10577 the current frame for the name (since C++ allows new names in any
10578 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10579 declaration. Only look beginning from the current scope outward up
10580 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10582 TEMPLATE_HEADER_P is true when this declaration is preceded by
10583 a set of template parameters. */
10586 xref_tag (enum tag_types tag_code, tree name,
10587 tag_scope scope, bool template_header_p)
10589 enum tree_code code;
10591 tree context = NULL_TREE;
10593 timevar_push (TV_NAME_LOOKUP);
10595 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10601 code = RECORD_TYPE;
10607 code = ENUMERAL_TYPE;
10610 gcc_unreachable ();
10613 /* In case of anonymous name, xref_tag is only called to
10614 make type node and push name. Name lookup is not required. */
10615 if (ANON_AGGRNAME_P (name))
10618 t = lookup_and_check_tag (tag_code, name,
10619 scope, template_header_p);
10621 if (t == error_mark_node)
10622 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10624 if (scope != ts_current && t && current_class_type
10625 && template_class_depth (current_class_type)
10626 && template_header_p)
10628 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10629 definition of this tag. Since, in addition, we are currently
10630 processing a (member) template declaration of a template
10631 class, we must be very careful; consider:
10638 { template <class V>
10639 friend struct S1; };
10641 Here, the S2::S1 declaration should not be confused with the
10642 outer declaration. In particular, the inner version should
10643 have a template parameter of level 2, not level 1. This
10644 would be particularly important if the member declaration
10647 template <class V = U> friend struct S1;
10649 say, when we should tsubst into `U' when instantiating
10650 S2. On the other hand, when presented with:
10660 we must find the inner binding eventually. We
10661 accomplish this by making sure that the new type we
10662 create to represent this declaration has the right
10664 context = TYPE_CONTEXT (t);
10670 /* If no such tag is yet defined, create a forward-reference node
10671 and record it as the "definition".
10672 When a real declaration of this type is found,
10673 the forward-reference will be altered into a real type. */
10674 if (code == ENUMERAL_TYPE)
10676 error ("use of enum %q#D without previous declaration", name);
10677 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10681 t = make_class_type (code);
10682 TYPE_CONTEXT (t) = context;
10683 t = pushtag (name, t, scope);
10688 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10690 if (!redeclare_class_template (t, current_template_parms))
10691 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10693 else if (!processing_template_decl
10694 && CLASS_TYPE_P (t)
10695 && CLASSTYPE_IS_TEMPLATE (t))
10697 error ("redeclaration of %qT as a non-template", t);
10698 error ("previous declaration %q+D", t);
10699 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10702 /* Make injected friend class visible. */
10703 if (scope != ts_within_enclosing_non_class
10704 && hidden_name_p (TYPE_NAME (t)))
10706 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10707 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10709 if (TYPE_TEMPLATE_INFO (t))
10711 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10712 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10721 xref_tag_from_type (tree old, tree id, tag_scope scope)
10723 enum tag_types tag_kind;
10725 if (TREE_CODE (old) == RECORD_TYPE)
10726 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10728 tag_kind = union_type;
10730 if (id == NULL_TREE)
10731 id = TYPE_IDENTIFIER (old);
10733 return xref_tag (tag_kind, id, scope, false);
10736 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10737 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10738 access_* node, and the TREE_VALUE is the type of the base-class.
10739 Non-NULL TREE_TYPE indicates virtual inheritance.
10741 Returns true if the binfo hierarchy was successfully created,
10742 false if an error was detected. */
10745 xref_basetypes (tree ref, tree base_list)
10748 tree binfo, base_binfo;
10749 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10750 unsigned max_bases = 0; /* Maximum direct bases. */
10752 tree default_access;
10753 tree igo_prev; /* Track Inheritance Graph Order. */
10755 if (ref == error_mark_node)
10758 /* The base of a derived class is private by default, all others are
10760 default_access = (TREE_CODE (ref) == RECORD_TYPE
10761 && CLASSTYPE_DECLARED_CLASS (ref)
10762 ? access_private_node : access_public_node);
10764 /* First, make sure that any templates in base-classes are
10765 instantiated. This ensures that if we call ourselves recursively
10766 we do not get confused about which classes are marked and which
10768 basep = &base_list;
10771 tree basetype = TREE_VALUE (*basep);
10773 if (!(processing_template_decl && uses_template_parms (basetype))
10774 && !complete_type_or_else (basetype, NULL))
10775 /* An incomplete type. Remove it from the list. */
10776 *basep = TREE_CHAIN (*basep);
10780 if (TREE_TYPE (*basep))
10782 if (CLASS_TYPE_P (basetype))
10783 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10784 basep = &TREE_CHAIN (*basep);
10788 TYPE_MARKED_P (ref) = 1;
10790 /* The binfo slot should be empty, unless this is an (ill-formed)
10792 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10793 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10795 binfo = make_tree_binfo (max_bases);
10797 TYPE_BINFO (ref) = binfo;
10798 BINFO_OFFSET (binfo) = size_zero_node;
10799 BINFO_TYPE (binfo) = ref;
10801 /* Apply base-class info set up to the variants of this type. */
10802 fixup_type_variants (ref);
10806 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10807 /* An aggregate cannot have baseclasses. */
10808 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10810 if (TREE_CODE (ref) == UNION_TYPE)
10812 error ("derived union %qT invalid", ref);
10819 if (TYPE_FOR_JAVA (ref))
10821 error ("Java class %qT cannot have multiple bases", ref);
10828 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10830 if (TYPE_FOR_JAVA (ref))
10832 error ("Java class %qT cannot have virtual bases", ref);
10837 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10839 tree access = TREE_PURPOSE (base_list);
10840 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10841 tree basetype = TREE_VALUE (base_list);
10843 if (access == access_default_node)
10844 access = default_access;
10846 if (PACK_EXPANSION_P (basetype))
10847 basetype = PACK_EXPANSION_PATTERN (basetype);
10848 if (TREE_CODE (basetype) == TYPE_DECL)
10849 basetype = TREE_TYPE (basetype);
10850 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10852 error ("base type %qT fails to be a struct or class type",
10857 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10858 TYPE_FOR_JAVA (ref) = 1;
10860 base_binfo = NULL_TREE;
10861 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10863 base_binfo = TYPE_BINFO (basetype);
10864 /* The original basetype could have been a typedef'd type. */
10865 basetype = BINFO_TYPE (base_binfo);
10867 /* Inherit flags from the base. */
10868 TYPE_HAS_NEW_OPERATOR (ref)
10869 |= TYPE_HAS_NEW_OPERATOR (basetype);
10870 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10871 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10872 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10873 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10874 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10875 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10876 CLASSTYPE_REPEATED_BASE_P (ref)
10877 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10880 /* We must do this test after we've seen through a typedef
10882 if (TYPE_MARKED_P (basetype))
10884 if (basetype == ref)
10885 error ("recursive type %qT undefined", basetype);
10887 error ("duplicate base type %qT invalid", basetype);
10891 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10892 /* Regenerate the pack expansion for the bases. */
10893 basetype = make_pack_expansion (basetype);
10895 TYPE_MARKED_P (basetype) = 1;
10897 base_binfo = copy_binfo (base_binfo, basetype, ref,
10898 &igo_prev, via_virtual);
10899 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10900 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10902 BINFO_BASE_APPEND (binfo, base_binfo);
10903 BINFO_BASE_ACCESS_APPEND (binfo, access);
10906 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10907 /* If we have space in the vbase vector, we must have shared at
10908 least one of them, and are therefore diamond shaped. */
10909 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10911 /* Unmark all the types. */
10912 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10913 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10914 TYPE_MARKED_P (ref) = 0;
10916 /* Now see if we have a repeated base type. */
10917 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10919 for (base_binfo = binfo; base_binfo;
10920 base_binfo = TREE_CHAIN (base_binfo))
10922 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10924 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10927 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10929 for (base_binfo = binfo; base_binfo;
10930 base_binfo = TREE_CHAIN (base_binfo))
10931 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10932 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10941 /* Begin compiling the definition of an enumeration type.
10944 UNDERLYING_TYPE is the type that will be used as the storage for
10945 the enumeration type. This should be NULL_TREE if no storage type
10948 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10950 Returns the type object, as yet incomplete.
10951 Also records info about it so that build_enumerator
10952 may be used to declare the individual values as they are read. */
10955 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10959 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10961 /* If this is the real definition for a previous forward reference,
10962 fill in the contents in the same object that used to be the
10963 forward reference. */
10965 enumtype = lookup_and_check_tag (enum_type, name,
10966 /*tag_scope=*/ts_current,
10967 /*template_header_p=*/false);
10969 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10971 error_at (input_location, "multiple definition of %q#T", enumtype);
10972 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
10973 "previous definition here");
10974 /* Clear out TYPE_VALUES, and start again. */
10975 TYPE_VALUES (enumtype) = NULL_TREE;
10979 /* In case of error, make a dummy enum to allow parsing to
10981 if (enumtype == error_mark_node)
10982 name = make_anon_name ();
10984 enumtype = make_node (ENUMERAL_TYPE);
10985 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10988 if (enumtype == error_mark_node)
10993 SET_SCOPED_ENUM_P (enumtype, 1);
10994 begin_scope (sk_scoped_enum, enumtype);
10996 /* [C++0x dcl.enum]p5:
10998 If not explicitly specified, the underlying type of a scoped
10999 enumeration type is int. */
11000 if (!underlying_type)
11001 underlying_type = integer_type_node;
11004 if (underlying_type)
11006 if (CP_INTEGRAL_TYPE_P (underlying_type))
11008 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11009 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11010 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11011 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11012 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11013 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11014 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11015 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11016 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11017 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11019 else if (!dependent_type_p (underlying_type))
11020 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11021 underlying_type, enumtype);
11027 /* After processing and defining all the values of an enumeration type,
11028 install their decls in the enumeration type and finish it off.
11029 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11032 finish_enum (tree enumtype)
11041 bool use_short_enum;
11046 tree underlying_type = NULL_TREE;
11047 bool fixed_underlying_type_p
11048 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11050 /* We built up the VALUES in reverse order. */
11051 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11053 /* For an enum defined in a template, just set the type of the values;
11054 all further processing is postponed until the template is
11055 instantiated. We need to set the type so that tsubst of a CONST_DECL
11057 if (processing_template_decl)
11059 for (values = TYPE_VALUES (enumtype);
11061 values = TREE_CHAIN (values))
11062 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11063 if (at_function_scope_p ())
11064 add_stmt (build_min (TAG_DEFN, enumtype));
11065 if (SCOPED_ENUM_P (enumtype))
11070 /* Determine the minimum and maximum values of the enumerators. */
11071 if (TYPE_VALUES (enumtype))
11073 minnode = maxnode = NULL_TREE;
11075 for (values = TYPE_VALUES (enumtype);
11077 values = TREE_CHAIN (values))
11079 decl = TREE_VALUE (values);
11081 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11082 each enumerator has the type of its enumeration. Prior to the
11083 closing brace, the type of each enumerator is the type of its
11084 initializing value. */
11085 TREE_TYPE (decl) = enumtype;
11087 /* Update the minimum and maximum values, if appropriate. */
11088 value = DECL_INITIAL (decl);
11089 if (value == error_mark_node)
11090 value = integer_zero_node;
11091 /* Figure out what the minimum and maximum values of the
11092 enumerators are. */
11094 minnode = maxnode = value;
11095 else if (tree_int_cst_lt (maxnode, value))
11097 else if (tree_int_cst_lt (value, minnode))
11104 If the enumerator-list is empty, the underlying type is as if
11105 the enumeration had a single enumerator with value 0. */
11106 minnode = maxnode = integer_zero_node;
11108 /* Compute the number of bits require to represent all values of the
11109 enumeration. We must do this before the type of MINNODE and
11110 MAXNODE are transformed, since tree_int_cst_min_precision relies
11111 on the TREE_TYPE of the value it is passed. */
11112 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11113 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11114 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11115 precision = MAX (lowprec, highprec);
11117 if (!fixed_underlying_type_p)
11119 /* Determine the underlying type of the enumeration.
11123 The underlying type of an enumeration is an integral type that
11124 can represent all the enumerator values defined in the
11125 enumeration. It is implementation-defined which integral type is
11126 used as the underlying type for an enumeration except that the
11127 underlying type shall not be larger than int unless the value of
11128 an enumerator cannot fit in an int or unsigned int.
11130 We use "int" or an "unsigned int" as the underlying type, even if
11131 a smaller integral type would work, unless the user has
11132 explicitly requested that we use the smallest possible type. The
11133 user can request that for all enumerations with a command line
11134 flag, or for just one enumeration with an attribute. */
11136 use_short_enum = flag_short_enums
11137 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11139 for (itk = (use_short_enum ? itk_char : itk_int);
11143 underlying_type = integer_types[itk];
11144 if (TYPE_PRECISION (underlying_type) >= precision
11145 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11148 if (itk == itk_none)
11152 IF no integral type can represent all the enumerator values, the
11153 enumeration is ill-formed. */
11154 error ("no integral type can represent all of the enumerator values "
11155 "for %qT", enumtype);
11156 precision = TYPE_PRECISION (long_long_integer_type_node);
11157 underlying_type = integer_types[itk_unsigned_long_long];
11162 The value of sizeof() applied to an enumeration type, an object
11163 of an enumeration type, or an enumerator, is the value of sizeof()
11164 applied to the underlying type. */
11165 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11166 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11167 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11168 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11169 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11170 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11172 /* Set the underlying type of the enumeration type to the
11173 computed enumeration type, restricted to the enumerator
11175 ENUM_UNDERLYING_TYPE (enumtype)
11176 = build_distinct_type_copy (underlying_type);
11177 set_min_and_max_values_for_integral_type
11178 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11181 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11183 /* Compute the minimum and maximum values for the type.
11187 For an enumeration where emin is the smallest enumerator and emax
11188 is the largest, the values of the enumeration are the values of the
11189 underlying type in the range bmin to bmax, where bmin and bmax are,
11190 respectively, the smallest and largest values of the smallest bit-
11191 field that can store emin and emax. */
11193 /* The middle-end currently assumes that types with TYPE_PRECISION
11194 narrower than their underlying type are suitably zero or sign
11195 extended to fill their mode. g++ doesn't make these guarantees.
11196 Until the middle-end can represent such paradoxical types, we
11197 set the TYPE_PRECISION to the width of the underlying type. */
11198 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11200 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11202 /* Convert each of the enumerators to the type of the underlying
11203 type of the enumeration. */
11204 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11206 location_t saved_location;
11208 decl = TREE_VALUE (values);
11209 saved_location = input_location;
11210 input_location = DECL_SOURCE_LOCATION (decl);
11211 if (fixed_underlying_type_p)
11212 /* If the enumeration type has a fixed underlying type, we
11213 already checked all of the enumerator values. */
11214 value = DECL_INITIAL (decl);
11216 value = perform_implicit_conversion (underlying_type,
11217 DECL_INITIAL (decl),
11218 tf_warning_or_error);
11219 input_location = saved_location;
11221 /* Do not clobber shared ints. */
11222 value = copy_node (value);
11224 TREE_TYPE (value) = enumtype;
11225 DECL_INITIAL (decl) = value;
11228 /* Fix up all variant types of this enum type. */
11229 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11231 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11232 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11233 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11234 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11235 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11236 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11237 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11238 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11239 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11240 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11241 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11244 /* Finish up the scope of a scoped enumeration. */
11245 if (SCOPED_ENUM_P (enumtype))
11248 /* Finish debugging output for this type. */
11249 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11252 /* Build and install a CONST_DECL for an enumeration constant of the
11253 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11254 Assignment of sequential values by default is handled here. */
11257 build_enumerator (tree name, tree value, tree enumtype)
11263 /* If the VALUE was erroneous, pretend it wasn't there; that will
11264 result in the enum being assigned the next value in sequence. */
11265 if (value == error_mark_node)
11268 /* Remove no-op casts from the value. */
11270 STRIP_TYPE_NOPS (value);
11272 if (! processing_template_decl)
11274 /* Validate and default VALUE. */
11275 if (value != NULL_TREE)
11277 value = integral_constant_value (value);
11279 if (TREE_CODE (value) == INTEGER_CST)
11281 value = perform_integral_promotions (value);
11282 constant_expression_warning (value);
11286 error ("enumerator value for %qD is not an integer constant", name);
11291 /* Default based on previous value. */
11292 if (value == NULL_TREE)
11294 if (TYPE_VALUES (enumtype))
11297 unsigned HOST_WIDE_INT lo;
11301 /* The next value is the previous value plus one.
11302 add_double doesn't know the type of the target expression,
11303 so we must check with int_fits_type_p as well. */
11304 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11305 if (error_operand_p (prev_value))
11306 value = error_mark_node;
11309 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11310 TREE_INT_CST_HIGH (prev_value),
11312 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11314 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11318 error ("overflow in enumeration values at %qD", name);
11319 value = error_mark_node;
11324 value = integer_zero_node;
11327 /* Remove no-op casts from the value. */
11328 STRIP_TYPE_NOPS (value);
11330 /* If the underlying type of the enum is fixed, check whether
11331 the enumerator values fits in the underlying type. If it
11332 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11333 if (ENUM_UNDERLYING_TYPE (enumtype)
11335 && TREE_CODE (value) == INTEGER_CST
11336 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11338 error ("enumerator value %E is too large for underlying type %<%T%>",
11339 value, ENUM_UNDERLYING_TYPE (enumtype));
11341 /* Silently convert the value so that we can continue. */
11342 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11347 /* C++ associates enums with global, function, or class declarations. */
11348 context = current_scope ();
11350 /* Build the actual enumeration constant. Note that the enumeration
11351 constants have the underlying type of the enum (if it is fixed)
11352 or the type of their initializer (if the underlying type of the
11353 enum is not fixed):
11357 If the underlying type is fixed, the type of each enumerator
11358 prior to the closing brace is the underlying type; if the
11359 initializing value of an enumerator cannot be represented by
11360 the underlying type, the program is ill-formed. If the
11361 underlying type is not fixed, the type of each enumerator is
11362 the type of its initializing value.
11364 If the underlying type is not fixed, it will be computed by
11365 finish_enum and we will reset the type of this enumerator. Of
11366 course, if we're processing a template, there may be no value. */
11367 type = value ? TREE_TYPE (value) : NULL_TREE;
11369 if (context && context == current_class_type)
11370 /* This enum declaration is local to the class. We need the full
11371 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11372 decl = build_lang_decl (CONST_DECL, name, type);
11374 /* It's a global enum, or it's local to a function. (Note local to
11375 a function could mean local to a class method. */
11376 decl = build_decl (input_location, CONST_DECL, name, type);
11378 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11379 TREE_CONSTANT (decl) = 1;
11380 TREE_READONLY (decl) = 1;
11381 DECL_INITIAL (decl) = value;
11383 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11384 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11385 on the TYPE_FIELDS list for `S'. (That's so that you can say
11386 things like `S::i' later.) */
11387 finish_member_declaration (decl);
11391 /* Add this enumeration constant to the list for this type. */
11392 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11395 /* Look for an enumerator with the given NAME within the enumeration
11396 type ENUMTYPE. This routine is used primarily for qualified name
11397 lookup into an enumerator in C++0x, e.g.,
11399 enum class Color { Red, Green, Blue };
11401 Color color = Color::Red;
11403 Returns the value corresponding to the enumerator, or
11404 NULL_TREE if no such enumerator was found. */
11406 lookup_enumerator (tree enumtype, tree name)
11409 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11411 e = purpose_member (name, TYPE_VALUES (enumtype));
11412 return e? TREE_VALUE (e) : NULL_TREE;
11416 /* We're defining DECL. Make sure that it's type is OK. */
11419 check_function_type (tree decl, tree current_function_parms)
11421 tree fntype = TREE_TYPE (decl);
11422 tree return_type = complete_type (TREE_TYPE (fntype));
11424 /* In a function definition, arg types must be complete. */
11425 require_complete_types_for_parms (current_function_parms);
11427 if (dependent_type_p (return_type))
11429 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11430 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11432 tree args = TYPE_ARG_TYPES (fntype);
11434 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11435 error ("return type %q#T is incomplete", return_type);
11437 error ("return type has Java class type %q#T", return_type);
11439 /* Make it return void instead. */
11440 if (TREE_CODE (fntype) == METHOD_TYPE)
11441 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11443 TREE_CHAIN (args));
11445 fntype = build_function_type (void_type_node, args);
11447 = build_exception_variant (fntype,
11448 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11451 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11454 /* Create the FUNCTION_DECL for a function definition.
11455 DECLSPECS and DECLARATOR are the parts of the declaration;
11456 they describe the function's name and the type it returns,
11457 but twisted together in a fashion that parallels the syntax of C.
11459 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11460 DECLARATOR is really the DECL for the function we are about to
11461 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11462 indicating that the function is an inline defined in-class.
11464 This function creates a binding context for the function body
11465 as well as setting up the FUNCTION_DECL in current_function_decl.
11467 For C++, we must first check whether that datum makes any sense.
11468 For example, "class A local_a(1,2);" means that variable local_a
11469 is an aggregate of type A, which should have a constructor
11470 applied to it with the argument list [1, 2].
11472 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11473 or may be a BLOCK if the function has been defined previously
11474 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11475 error_mark_node if the function has never been defined, or
11476 a BLOCK if the function has been defined somewhere. */
11479 start_preparsed_function (tree decl1, tree attrs, int flags)
11481 tree ctype = NULL_TREE;
11484 int doing_friend = 0;
11485 struct cp_binding_level *bl;
11486 tree current_function_parms;
11487 struct c_fileinfo *finfo
11488 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11489 bool honor_interface;
11491 /* Sanity check. */
11492 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11493 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11495 fntype = TREE_TYPE (decl1);
11496 if (TREE_CODE (fntype) == METHOD_TYPE)
11497 ctype = TYPE_METHOD_BASETYPE (fntype);
11499 /* ISO C++ 11.4/5. A friend function defined in a class is in
11500 the (lexical) scope of the class in which it is defined. */
11501 if (!ctype && DECL_FRIEND_P (decl1))
11503 ctype = DECL_FRIEND_CONTEXT (decl1);
11505 /* CTYPE could be null here if we're dealing with a template;
11506 for example, `inline friend float foo()' inside a template
11507 will have no CTYPE set. */
11508 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11514 if (DECL_DECLARED_INLINE_P (decl1)
11515 && lookup_attribute ("noinline", attrs))
11516 warning (0, "inline function %q+D given attribute noinline", decl1);
11518 /* Handle gnu_inline attribute. */
11519 if (GNU_INLINE_P (decl1))
11521 DECL_EXTERNAL (decl1) = 1;
11522 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11523 DECL_INTERFACE_KNOWN (decl1) = 1;
11524 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11527 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11528 /* This is a constructor, we must ensure that any default args
11529 introduced by this definition are propagated to the clones
11530 now. The clones are used directly in overload resolution. */
11531 adjust_clone_args (decl1);
11533 /* Sometimes we don't notice that a function is a static member, and
11534 build a METHOD_TYPE for it. Fix that up now. */
11535 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11536 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11538 revert_static_member_fn (decl1);
11542 /* Set up current_class_type, and enter the scope of the class, if
11545 push_nested_class (ctype);
11546 else if (DECL_STATIC_FUNCTION_P (decl1))
11547 push_nested_class (DECL_CONTEXT (decl1));
11549 /* Now that we have entered the scope of the class, we must restore
11550 the bindings for any template parameters surrounding DECL1, if it
11551 is an inline member template. (Order is important; consider the
11552 case where a template parameter has the same name as a field of
11553 the class.) It is not until after this point that
11554 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11555 if (flags & SF_INCLASS_INLINE)
11556 maybe_begin_member_template_processing (decl1);
11558 /* Effective C++ rule 15. */
11560 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11561 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11562 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11564 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11565 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11566 if (!DECL_INITIAL (decl1))
11567 DECL_INITIAL (decl1) = error_mark_node;
11569 /* This function exists in static storage.
11570 (This does not mean `static' in the C sense!) */
11571 TREE_STATIC (decl1) = 1;
11573 /* We must call push_template_decl after current_class_type is set
11574 up. (If we are processing inline definitions after exiting a
11575 class scope, current_class_type will be NULL_TREE until set above
11576 by push_nested_class.) */
11577 if (processing_template_decl)
11579 /* FIXME: Handle error_mark_node more gracefully. */
11580 tree newdecl1 = push_template_decl (decl1);
11581 if (newdecl1 != error_mark_node)
11585 /* We are now in the scope of the function being defined. */
11586 current_function_decl = decl1;
11588 /* Save the parm names or decls from this function's declarator
11589 where store_parm_decls will find them. */
11590 current_function_parms = DECL_ARGUMENTS (decl1);
11592 /* Make sure the parameter and return types are reasonable. When
11593 you declare a function, these types can be incomplete, but they
11594 must be complete when you define the function. */
11595 check_function_type (decl1, current_function_parms);
11597 /* Build the return declaration for the function. */
11598 restype = TREE_TYPE (fntype);
11599 if (DECL_RESULT (decl1) == NULL_TREE)
11603 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11604 DECL_ARTIFICIAL (resdecl) = 1;
11605 DECL_IGNORED_P (resdecl) = 1;
11606 DECL_RESULT (decl1) = resdecl;
11608 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11611 /* Let the user know we're compiling this function. */
11612 announce_function (decl1);
11614 /* Record the decl so that the function name is defined.
11615 If we already have a decl for this name, and it is a FUNCTION_DECL,
11616 use the old decl. */
11617 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11619 /* A specialization is not used to guide overload resolution. */
11620 if (!DECL_FUNCTION_MEMBER_P (decl1)
11621 && !(DECL_USE_TEMPLATE (decl1) &&
11622 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11624 tree olddecl = pushdecl (decl1);
11626 if (olddecl == error_mark_node)
11627 /* If something went wrong when registering the declaration,
11628 use DECL1; we have to have a FUNCTION_DECL to use when
11629 parsing the body of the function. */
11633 /* Otherwise, OLDDECL is either a previous declaration
11634 of the same function or DECL1 itself. */
11636 if (warn_missing_declarations
11637 && olddecl == decl1
11638 && !DECL_MAIN_P (decl1)
11639 && TREE_PUBLIC (decl1)
11640 && !DECL_DECLARED_INLINE_P (decl1))
11644 /* Check whether DECL1 is in an anonymous
11646 for (context = DECL_CONTEXT (decl1);
11648 context = DECL_CONTEXT (context))
11650 if (TREE_CODE (context) == NAMESPACE_DECL
11651 && DECL_NAME (context) == NULL_TREE)
11655 if (context == NULL)
11656 warning (OPT_Wmissing_declarations,
11657 "no previous declaration for %q+D", decl1);
11665 /* We need to set the DECL_CONTEXT. */
11666 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11667 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11669 fntype = TREE_TYPE (decl1);
11671 /* If #pragma weak applies, mark the decl appropriately now.
11672 The pragma only applies to global functions. Because
11673 determining whether or not the #pragma applies involves
11674 computing the mangled name for the declaration, we cannot
11675 apply the pragma until after we have merged this declaration
11676 with any previous declarations; if the original declaration
11677 has a linkage specification, that specification applies to
11678 the definition as well, and may affect the mangled name. */
11679 if (!DECL_CONTEXT (decl1))
11680 maybe_apply_pragma_weak (decl1);
11683 /* Reset this in case the call to pushdecl changed it. */
11684 current_function_decl = decl1;
11686 gcc_assert (DECL_INITIAL (decl1));
11688 /* This function may already have been parsed, in which case just
11689 return; our caller will skip over the body without parsing. */
11690 if (DECL_INITIAL (decl1) != error_mark_node)
11693 /* Initialize RTL machinery. We cannot do this until
11694 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11695 even when processing a template; this is how we get
11696 CFUN set up, and our per-function variables initialized.
11697 FIXME factor out the non-RTL stuff. */
11698 bl = current_binding_level;
11699 allocate_struct_function (decl1, processing_template_decl);
11701 /* Initialize the language data structures. Whenever we start
11702 a new function, we destroy temporaries in the usual way. */
11703 cfun->language = GGC_CNEW (struct language_function);
11704 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11705 current_binding_level = bl;
11707 /* Even though we're inside a function body, we still don't want to
11708 call expand_expr to calculate the size of a variable-sized array.
11709 We haven't necessarily assigned RTL to all variables yet, so it's
11710 not safe to try to expand expressions involving them. */
11711 cfun->dont_save_pending_sizes_p = 1;
11713 /* Start the statement-tree, start the tree now. */
11714 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11716 /* If we are (erroneously) defining a function that we have already
11717 defined before, wipe out what we knew before. */
11718 if (!DECL_PENDING_INLINE_P (decl1))
11719 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11721 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11723 /* We know that this was set up by `grokclassfn'. We do not
11724 wait until `store_parm_decls', since evil parse errors may
11725 never get us to that point. Here we keep the consistency
11726 between `current_class_type' and `current_class_ptr'. */
11727 tree t = DECL_ARGUMENTS (decl1);
11729 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11730 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11732 cp_function_chain->x_current_class_ref
11733 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11734 cp_function_chain->x_current_class_ptr = t;
11736 /* Constructors and destructors need to know whether they're "in
11737 charge" of initializing virtual base classes. */
11738 t = TREE_CHAIN (t);
11739 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11741 current_in_charge_parm = t;
11742 t = TREE_CHAIN (t);
11744 if (DECL_HAS_VTT_PARM_P (decl1))
11746 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11747 current_vtt_parm = t;
11751 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11752 /* Implicitly-defined methods (like the
11753 destructor for a class in which no destructor
11754 is explicitly declared) must not be defined
11755 until their definition is needed. So, we
11756 ignore interface specifications for
11757 compiler-generated functions. */
11758 && !DECL_ARTIFICIAL (decl1));
11760 if (DECL_INTERFACE_KNOWN (decl1))
11762 tree ctx = decl_function_context (decl1);
11764 if (DECL_NOT_REALLY_EXTERN (decl1))
11765 DECL_EXTERNAL (decl1) = 0;
11767 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11768 && TREE_PUBLIC (ctx))
11769 /* This is a function in a local class in an extern inline
11771 comdat_linkage (decl1);
11773 /* If this function belongs to an interface, it is public.
11774 If it belongs to someone else's interface, it is also external.
11775 This only affects inlines and template instantiations. */
11776 else if (!finfo->interface_unknown && honor_interface)
11778 if (DECL_DECLARED_INLINE_P (decl1)
11779 || DECL_TEMPLATE_INSTANTIATION (decl1)
11780 || processing_template_decl)
11782 DECL_EXTERNAL (decl1)
11783 = (finfo->interface_only
11784 || (DECL_DECLARED_INLINE_P (decl1)
11785 && ! flag_implement_inlines
11786 && !DECL_VINDEX (decl1)));
11788 /* For WIN32 we also want to put these in linkonce sections. */
11789 maybe_make_one_only (decl1);
11792 DECL_EXTERNAL (decl1) = 0;
11793 DECL_INTERFACE_KNOWN (decl1) = 1;
11794 /* If this function is in an interface implemented in this file,
11795 make sure that the back end knows to emit this function
11797 if (!DECL_EXTERNAL (decl1))
11798 mark_needed (decl1);
11800 else if (finfo->interface_unknown && finfo->interface_only
11801 && honor_interface)
11803 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11804 interface, we will have both finfo->interface_unknown and
11805 finfo->interface_only set. In that case, we don't want to
11806 use the normal heuristics because someone will supply a
11807 #pragma implementation elsewhere, and deducing it here would
11808 produce a conflict. */
11809 comdat_linkage (decl1);
11810 DECL_EXTERNAL (decl1) = 0;
11811 DECL_INTERFACE_KNOWN (decl1) = 1;
11812 DECL_DEFER_OUTPUT (decl1) = 1;
11816 /* This is a definition, not a reference.
11817 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11818 if (!GNU_INLINE_P (decl1))
11819 DECL_EXTERNAL (decl1) = 0;
11821 if ((DECL_DECLARED_INLINE_P (decl1)
11822 || DECL_TEMPLATE_INSTANTIATION (decl1))
11823 && ! DECL_INTERFACE_KNOWN (decl1)
11824 /* Don't try to defer nested functions for now. */
11825 && ! decl_function_context (decl1))
11826 DECL_DEFER_OUTPUT (decl1) = 1;
11828 DECL_INTERFACE_KNOWN (decl1) = 1;
11831 /* Determine the ELF visibility attribute for the function. We must not
11832 do this before calling "pushdecl", as we must allow "duplicate_decls"
11833 to merge any attributes appropriately. We also need to wait until
11835 if (!DECL_CLONED_FUNCTION_P (decl1))
11836 determine_visibility (decl1);
11838 begin_scope (sk_function_parms, decl1);
11842 if (DECL_DESTRUCTOR_P (decl1)
11843 || (DECL_CONSTRUCTOR_P (decl1)
11844 && targetm.cxx.cdtor_returns_this ()))
11846 cdtor_label = build_decl (input_location,
11847 LABEL_DECL, NULL_TREE, NULL_TREE);
11848 DECL_CONTEXT (cdtor_label) = current_function_decl;
11851 start_fname_decls ();
11853 store_parm_decls (current_function_parms);
11857 /* Like start_preparsed_function, except that instead of a
11858 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11860 Returns 1 on success. If the DECLARATOR is not suitable for a function
11861 (it defines a datum instead), we return 0, which tells
11862 yyparse to report a parse error. */
11865 start_function (cp_decl_specifier_seq *declspecs,
11866 const cp_declarator *declarator,
11871 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11872 if (decl1 == error_mark_node)
11874 /* If the declarator is not suitable for a function definition,
11875 cause a syntax error. */
11876 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11878 error ("invalid function declaration");
11882 if (DECL_MAIN_P (decl1))
11883 /* main must return int. grokfndecl should have corrected it
11884 (and issued a diagnostic) if the user got it wrong. */
11885 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11886 integer_type_node));
11888 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11893 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11897 use_eh_spec_block (tree fn)
11899 return (flag_exceptions && flag_enforce_eh_specs
11900 && !processing_template_decl
11901 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11902 /* We insert the EH_SPEC_BLOCK only in the original
11903 function; then, it is copied automatically to the
11905 && !DECL_CLONED_FUNCTION_P (fn)
11906 /* Implicitly-generated constructors and destructors have
11907 exception specifications. However, those specifications
11908 are the union of the possible exceptions specified by the
11909 constructors/destructors for bases and members, so no
11910 unallowed exception will ever reach this function. By
11911 not creating the EH_SPEC_BLOCK we save a little memory,
11912 and we avoid spurious warnings about unreachable
11914 && !DECL_ARTIFICIAL (fn));
11917 /* Store the parameter declarations into the current function declaration.
11918 This is called after parsing the parameter declarations, before
11919 digesting the body of the function.
11921 Also install to binding contour return value identifier, if any. */
11924 store_parm_decls (tree current_function_parms)
11926 tree fndecl = current_function_decl;
11929 /* This is a chain of any other decls that came in among the parm
11930 declarations. If a parm is declared with enum {foo, bar} x;
11931 then CONST_DECLs for foo and bar are put here. */
11932 tree nonparms = NULL_TREE;
11934 if (current_function_parms)
11936 /* This case is when the function was defined with an ANSI prototype.
11937 The parms already have decls, so we need not do anything here
11938 except record them as in effect
11939 and complain if any redundant old-style parm decls were written. */
11941 tree specparms = current_function_parms;
11944 /* Must clear this because it might contain TYPE_DECLs declared
11946 current_binding_level->names = NULL;
11948 /* If we're doing semantic analysis, then we'll call pushdecl
11949 for each of these. We must do them in reverse order so that
11950 they end in the correct forward order. */
11951 specparms = nreverse (specparms);
11953 for (parm = specparms; parm; parm = next)
11955 next = TREE_CHAIN (parm);
11956 if (TREE_CODE (parm) == PARM_DECL)
11958 if (DECL_NAME (parm) == NULL_TREE
11959 || TREE_CODE (parm) != VOID_TYPE)
11962 error ("parameter %qD declared void", parm);
11966 /* If we find an enum constant or a type tag,
11967 put it aside for the moment. */
11968 TREE_CHAIN (parm) = NULL_TREE;
11969 nonparms = chainon (nonparms, parm);
11973 /* Get the decls in their original chain order and record in the
11974 function. This is all and only the PARM_DECLs that were
11975 pushed into scope by the loop above. */
11976 DECL_ARGUMENTS (fndecl) = getdecls ();
11979 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11981 /* Now store the final chain of decls for the arguments
11982 as the decl-chain of the current lexical scope.
11983 Put the enumerators in as well, at the front so that
11984 DECL_ARGUMENTS is not modified. */
11985 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11987 if (use_eh_spec_block (current_function_decl))
11988 current_eh_spec_block = begin_eh_spec_block ();
11992 /* We have finished doing semantic analysis on DECL, but have not yet
11993 generated RTL for its body. Save away our current state, so that
11994 when we want to generate RTL later we know what to do. */
11997 save_function_data (tree decl)
11999 struct language_function *f;
12001 /* Save the language-specific per-function data so that we can
12002 get it back when we really expand this function. */
12003 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12006 f = GGC_NEW (struct language_function);
12007 memcpy (f, cp_function_chain, sizeof (struct language_function));
12008 DECL_SAVED_FUNCTION_DATA (decl) = f;
12010 /* Clear out the bits we don't need. */
12011 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12012 f->bindings = NULL;
12013 f->x_local_names = NULL;
12017 /* Set the return value of the constructor (if present). */
12020 finish_constructor_body (void)
12025 if (targetm.cxx.cdtor_returns_this ()
12026 && (! TYPE_FOR_JAVA (current_class_type)))
12028 /* Any return from a constructor will end up here. */
12029 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12031 val = DECL_ARGUMENTS (current_function_decl);
12032 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12033 DECL_RESULT (current_function_decl), val);
12034 /* Return the address of the object. */
12035 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12036 add_stmt (exprstmt);
12040 /* Do all the processing for the beginning of a destructor; set up the
12041 vtable pointers and cleanups for bases and members. */
12044 begin_destructor_body (void)
12046 tree compound_stmt;
12048 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12049 issued an error message. We still want to try to process the
12050 body of the function, but initialize_vtbl_ptrs will crash if
12051 TYPE_BINFO is NULL. */
12052 if (COMPLETE_TYPE_P (current_class_type))
12054 compound_stmt = begin_compound_stmt (0);
12055 /* Make all virtual function table pointers in non-virtual base
12056 classes point to CURRENT_CLASS_TYPE's virtual function
12058 initialize_vtbl_ptrs (current_class_ptr);
12059 finish_compound_stmt (compound_stmt);
12061 /* And insert cleanups for our bases and members so that they
12062 will be properly destroyed if we throw. */
12063 push_base_cleanups ();
12067 /* At the end of every destructor we generate code to delete the object if
12068 necessary. Do that now. */
12071 finish_destructor_body (void)
12075 /* Any return from a destructor will end up here; that way all base
12076 and member cleanups will be run when the function returns. */
12077 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12079 /* In a virtual destructor, we must call delete. */
12080 if (DECL_VIRTUAL_P (current_function_decl))
12083 tree virtual_size = cxx_sizeof (current_class_type);
12087 At the point of definition of a virtual destructor (including
12088 an implicit definition), non-placement operator delete shall
12089 be looked up in the scope of the destructor's class and if
12090 found shall be accessible and unambiguous. */
12091 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12093 /*global_p=*/false,
12094 /*placement=*/NULL_TREE,
12095 /*alloc_fn=*/NULL_TREE);
12097 if_stmt = begin_if_stmt ();
12098 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12099 current_in_charge_parm,
12102 finish_expr_stmt (exprstmt);
12103 finish_then_clause (if_stmt);
12104 finish_if_stmt (if_stmt);
12107 if (targetm.cxx.cdtor_returns_this ())
12111 val = DECL_ARGUMENTS (current_function_decl);
12112 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12113 DECL_RESULT (current_function_decl), val);
12114 /* Return the address of the object. */
12115 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12116 add_stmt (exprstmt);
12120 /* Do the necessary processing for the beginning of a function body, which
12121 in this case includes member-initializers, but not the catch clauses of
12122 a function-try-block. Currently, this means opening a binding level
12123 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12126 begin_function_body (void)
12130 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12133 if (processing_template_decl)
12134 /* Do nothing now. */;
12136 /* Always keep the BLOCK node associated with the outermost pair of
12137 curly braces of a function. These are needed for correct
12138 operation of dwarfout.c. */
12139 keep_next_level (true);
12141 stmt = begin_compound_stmt (BCS_FN_BODY);
12143 if (processing_template_decl)
12144 /* Do nothing now. */;
12145 else if (DECL_DESTRUCTOR_P (current_function_decl))
12146 begin_destructor_body ();
12151 /* Do the processing for the end of a function body. Currently, this means
12152 closing out the cleanups for fully-constructed bases and members, and in
12153 the case of the destructor, deleting the object if desired. Again, this
12154 is only meaningful for [cd]tors, since they are the only functions where
12155 there is a significant distinction between the main body and any
12156 function catch clauses. Handling, say, main() return semantics here
12157 would be wrong, as flowing off the end of a function catch clause for
12158 main() would also need to return 0. */
12161 finish_function_body (tree compstmt)
12163 if (compstmt == NULL_TREE)
12166 /* Close the block. */
12167 finish_compound_stmt (compstmt);
12169 if (processing_template_decl)
12170 /* Do nothing now. */;
12171 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12172 finish_constructor_body ();
12173 else if (DECL_DESTRUCTOR_P (current_function_decl))
12174 finish_destructor_body ();
12177 /* Given a function, returns the BLOCK corresponding to the outermost level
12178 of curly braces, skipping the artificial block created for constructor
12182 outer_curly_brace_block (tree fndecl)
12184 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12185 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12186 /* Skip the artificial function body block. */
12187 block = BLOCK_SUBBLOCKS (block);
12191 /* Finish up a function declaration and compile that function
12192 all the way to assembler language output. The free the storage
12193 for the function definition.
12195 FLAGS is a bitwise or of the following values:
12197 We just finished processing the body of an in-class inline
12198 function definition. (This processing will have taken place
12199 after the class definition is complete.) */
12202 finish_function (int flags)
12204 tree fndecl = current_function_decl;
12205 tree fntype, ctype = NULL_TREE;
12206 int inclass_inline = (flags & 2) != 0;
12209 /* When we get some parse errors, we can end up without a
12210 current_function_decl, so cope. */
12211 if (fndecl == NULL_TREE)
12212 return error_mark_node;
12214 gcc_assert (!defer_mark_used_calls);
12215 defer_mark_used_calls = true;
12217 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12218 && DECL_VIRTUAL_P (fndecl)
12219 && !processing_template_decl)
12221 tree fnclass = DECL_CONTEXT (fndecl);
12222 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12223 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12226 nested = function_depth > 1;
12227 fntype = TREE_TYPE (fndecl);
12229 /* TREE_READONLY (fndecl) = 1;
12230 This caused &foo to be of type ptr-to-const-function
12231 which then got a warning when stored in a ptr-to-function variable. */
12233 gcc_assert (building_stmt_tree ());
12234 /* The current function is being defined, so its DECL_INITIAL should
12235 be set, and unless there's a multiple definition, it should be
12236 error_mark_node. */
12237 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12239 /* For a cloned function, we've already got all the code we need;
12240 there's no need to add any extra bits. */
12241 if (!DECL_CLONED_FUNCTION_P (fndecl))
12243 if (DECL_MAIN_P (current_function_decl))
12247 /* Make it so that `main' always returns 0 by default (or
12250 stmt = finish_return_stmt (integer_one_node);
12252 stmt = finish_return_stmt (integer_zero_node);
12254 /* Hack. We don't want the middle-end to warn that this
12255 return is unreachable, so put the statement on the
12258 location_t linezero = linemap_line_start (line_table, 0, 1);
12259 SET_EXPR_LOCATION (stmt, linezero);
12263 if (use_eh_spec_block (current_function_decl))
12264 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12265 (TREE_TYPE (current_function_decl)),
12266 current_eh_spec_block);
12269 /* If we're saving up tree structure, tie off the function now. */
12270 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12272 finish_fname_decls ();
12274 /* If this function can't throw any exceptions, remember that. */
12275 if (!processing_template_decl
12276 && !cp_function_chain->can_throw
12277 && !flag_non_call_exceptions
12278 && !DECL_REPLACEABLE_P (fndecl))
12279 TREE_NOTHROW (fndecl) = 1;
12281 /* This must come after expand_function_end because cleanups might
12282 have declarations (from inline functions) that need to go into
12283 this function's blocks. */
12285 /* If the current binding level isn't the outermost binding level
12286 for this function, either there is a bug, or we have experienced
12287 syntax errors and the statement tree is malformed. */
12288 if (current_binding_level->kind != sk_function_parms)
12290 /* Make sure we have already experienced errors. */
12291 gcc_assert (errorcount);
12293 /* Throw away the broken statement tree and extra binding
12295 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12297 while (current_binding_level->kind != sk_function_parms)
12299 if (current_binding_level->kind == sk_class)
12300 pop_nested_class ();
12302 poplevel (0, 0, 0);
12305 poplevel (1, 0, 1);
12307 /* Statements should always be full-expressions at the outermost set
12308 of curly braces for a function. */
12309 gcc_assert (stmts_are_full_exprs_p ());
12311 /* Set up the named return value optimization, if we can. Candidate
12312 variables are selected in check_return_expr. */
12313 if (current_function_return_value)
12315 tree r = current_function_return_value;
12318 if (r != error_mark_node
12319 /* This is only worth doing for fns that return in memory--and
12320 simpler, since we don't have to worry about promoted modes. */
12321 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12322 /* Only allow this for variables declared in the outer scope of
12323 the function so we know that their lifetime always ends with a
12324 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12325 we were to do this optimization in tree-ssa. */
12326 && (outer = outer_curly_brace_block (fndecl))
12327 && chain_member (r, BLOCK_VARS (outer)))
12328 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12330 current_function_return_value = NULL_TREE;
12333 /* Remember that we were in class scope. */
12334 if (current_class_name)
12335 ctype = current_class_type;
12337 /* Must mark the RESULT_DECL as being in this function. */
12338 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12340 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12341 to the FUNCTION_DECL node itself. */
12342 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12344 /* Save away current state, if appropriate. */
12345 if (!processing_template_decl)
12346 save_function_data (fndecl);
12348 /* Complain if there's just no return statement. */
12349 if (warn_return_type
12350 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12351 && !dependent_type_p (TREE_TYPE (fntype))
12352 && !current_function_returns_value && !current_function_returns_null
12353 /* Don't complain if we abort or throw. */
12354 && !current_function_returns_abnormally
12355 && !DECL_NAME (DECL_RESULT (fndecl))
12356 && !TREE_NO_WARNING (fndecl)
12357 /* Structor return values (if any) are set by the compiler. */
12358 && !DECL_CONSTRUCTOR_P (fndecl)
12359 && !DECL_DESTRUCTOR_P (fndecl))
12361 warning (OPT_Wreturn_type,
12362 "no return statement in function returning non-void");
12363 TREE_NO_WARNING (fndecl) = 1;
12366 /* Store the end of the function, so that we get good line number
12367 info for the epilogue. */
12368 cfun->function_end_locus = input_location;
12370 /* Genericize before inlining. */
12371 if (!processing_template_decl)
12373 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12374 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12375 cp_genericize (fndecl);
12376 /* Clear out the bits we don't need. */
12377 f->x_current_class_ptr = NULL;
12378 f->x_current_class_ref = NULL;
12379 f->x_eh_spec_block = NULL;
12380 f->x_in_charge_parm = NULL;
12381 f->x_vtt_parm = NULL;
12382 f->x_return_value = NULL;
12383 f->bindings = NULL;
12384 f->extern_decl_map = NULL;
12386 /* Clear out the bits we don't need. */
12387 local_names = NULL;
12389 /* We're leaving the context of this function, so zap cfun. It's still in
12390 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12392 current_function_decl = NULL;
12394 /* If this is an in-class inline definition, we may have to pop the
12395 bindings for the template parameters that we added in
12396 maybe_begin_member_template_processing when start_function was
12398 if (inclass_inline)
12399 maybe_end_member_template_processing ();
12401 /* Leave the scope of the class. */
12403 pop_nested_class ();
12409 /* Let the error reporting routines know that we're outside a
12410 function. For a nested function, this value is used in
12411 cxx_pop_function_context and then reset via pop_function_context. */
12412 current_function_decl = NULL_TREE;
12414 defer_mark_used_calls = false;
12415 if (deferred_mark_used_calls)
12420 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12422 VEC_free (tree, gc, deferred_mark_used_calls);
12428 /* Create the FUNCTION_DECL for a function definition.
12429 DECLSPECS and DECLARATOR are the parts of the declaration;
12430 they describe the return type and the name of the function,
12431 but twisted together in a fashion that parallels the syntax of C.
12433 This function creates a binding context for the function body
12434 as well as setting up the FUNCTION_DECL in current_function_decl.
12436 Returns a FUNCTION_DECL on success.
12438 If the DECLARATOR is not suitable for a function (it defines a datum
12439 instead), we return 0, which tells yyparse to report a parse error.
12441 May return void_type_node indicating that this method is actually
12442 a friend. See grokfield for more details.
12444 Came here with a `.pushlevel' .
12446 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12447 CHANGES TO CODE IN `grokfield'. */
12450 grokmethod (cp_decl_specifier_seq *declspecs,
12451 const cp_declarator *declarator, tree attrlist)
12453 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12456 if (fndecl == error_mark_node)
12457 return error_mark_node;
12459 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12461 error ("invalid member function declaration");
12462 return error_mark_node;
12466 cplus_decl_attributes (&fndecl, attrlist, 0);
12468 /* Pass friends other than inline friend functions back. */
12469 if (fndecl == void_type_node)
12472 if (DECL_IN_AGGR_P (fndecl))
12474 if (DECL_CONTEXT (fndecl)
12475 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12476 error ("%qD is already defined in class %qT", fndecl,
12477 DECL_CONTEXT (fndecl));
12478 return error_mark_node;
12481 check_template_shadow (fndecl);
12483 DECL_DECLARED_INLINE_P (fndecl) = 1;
12484 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12486 /* We process method specializations in finish_struct_1. */
12487 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12489 fndecl = push_template_decl (fndecl);
12490 if (fndecl == error_mark_node)
12494 if (! DECL_FRIEND_P (fndecl))
12496 if (TREE_CHAIN (fndecl))
12498 fndecl = copy_node (fndecl);
12499 TREE_CHAIN (fndecl) = NULL_TREE;
12503 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12505 DECL_IN_AGGR_P (fndecl) = 1;
12510 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12511 we can lay it out later, when and if its type becomes complete. */
12514 maybe_register_incomplete_var (tree var)
12516 gcc_assert (TREE_CODE (var) == VAR_DECL);
12518 /* Keep track of variables with incomplete types. */
12519 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12520 && DECL_EXTERNAL (var))
12522 tree inner_type = TREE_TYPE (var);
12524 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12525 inner_type = TREE_TYPE (inner_type);
12526 inner_type = TYPE_MAIN_VARIANT (inner_type);
12528 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12529 /* RTTI TD entries are created while defining the type_info. */
12530 || (TYPE_LANG_SPECIFIC (inner_type)
12531 && TYPE_BEING_DEFINED (inner_type)))
12532 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12536 /* Called when a class type (given by TYPE) is defined. If there are
12537 any existing VAR_DECLs whose type has been completed by this
12538 declaration, update them now. */
12541 complete_vars (tree type)
12543 tree *list = &incomplete_vars;
12545 gcc_assert (CLASS_TYPE_P (type));
12548 if (same_type_p (type, TREE_PURPOSE (*list)))
12550 tree var = TREE_VALUE (*list);
12551 tree type = TREE_TYPE (var);
12552 /* Complete the type of the variable. The VAR_DECL itself
12553 will be laid out in expand_expr. */
12554 complete_type (type);
12555 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12556 /* Remove this entry from the list. */
12557 *list = TREE_CHAIN (*list);
12560 list = &TREE_CHAIN (*list);
12563 /* Check for pending declarations which may have abstract type. */
12564 complete_type_check_abstract (type);
12567 /* If DECL is of a type which needs a cleanup, build and return an
12568 expression to perform that cleanup here. Return NULL_TREE if no
12569 cleanup need be done. */
12572 cxx_maybe_build_cleanup (tree decl)
12578 /* Assume no cleanup is required. */
12579 cleanup = NULL_TREE;
12581 if (error_operand_p (decl))
12584 /* Handle "__attribute__((cleanup))". We run the cleanup function
12585 before the destructor since the destructor is what actually
12586 terminates the lifetime of the object. */
12587 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12594 /* Get the name specified by the user for the cleanup function. */
12595 id = TREE_VALUE (TREE_VALUE (attr));
12596 /* Look up the name to find the cleanup function to call. It is
12597 important to use lookup_name here because that is what is
12598 used in c-common.c:handle_cleanup_attribute when performing
12599 initial checks on the attribute. Note that those checks
12600 include ensuring that the function found is not an overloaded
12601 function, or an object with an overloaded call operator,
12602 etc.; we can rely on the fact that the function found is an
12603 ordinary FUNCTION_DECL. */
12604 fn = lookup_name (id);
12605 arg = build_address (decl);
12607 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12609 tf_warning_or_error);
12611 /* Handle ordinary C++ destructors. */
12612 type = TREE_TYPE (decl);
12613 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12615 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12616 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12617 && CLASSTYPE_VBASECLASSES (type));
12621 if (TREE_CODE (type) == ARRAY_TYPE)
12624 addr = build_address (decl);
12626 /* Optimize for space over speed here. */
12627 if (!has_vbases || flag_expensive_optimizations)
12628 flags |= LOOKUP_NONVIRTUAL;
12630 call = build_delete (TREE_TYPE (addr), addr,
12631 sfk_complete_destructor, flags, 0);
12633 cleanup = build_compound_expr (input_location, cleanup, call);
12641 /* When a stmt has been parsed, this function is called. */
12648 /* DECL was originally constructed as a non-static member function,
12649 but turned out to be static. Update it accordingly. */
12652 revert_static_member_fn (tree decl)
12655 tree function = TREE_TYPE (decl);
12656 tree args = TYPE_ARG_TYPES (function);
12658 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12659 != TYPE_UNQUALIFIED)
12660 error ("static member function %q#D declared with type qualifiers", decl);
12662 args = TREE_CHAIN (args);
12663 tmp = build_function_type (TREE_TYPE (function), args);
12664 tmp = build_qualified_type (tmp, cp_type_quals (function));
12665 tmp = build_exception_variant (tmp,
12666 TYPE_RAISES_EXCEPTIONS (function));
12667 TREE_TYPE (decl) = tmp;
12668 if (DECL_ARGUMENTS (decl))
12669 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12670 DECL_STATIC_FUNCTION_P (decl) = 1;
12673 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12674 one of the language-independent trees. */
12676 enum cp_tree_node_structure_enum
12677 cp_tree_node_structure (union lang_tree_node * t)
12679 switch (TREE_CODE (&t->generic))
12681 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12682 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12683 case OVERLOAD: return TS_CP_OVERLOAD;
12684 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12685 case PTRMEM_CST: return TS_CP_PTRMEM;
12686 case BASELINK: return TS_CP_BASELINK;
12687 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12688 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12689 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12690 default: return TS_CP_GENERIC;
12694 /* Build the void_list_node (void_type_node having been created). */
12696 build_void_list_node (void)
12698 tree t = build_tree_list (NULL_TREE, void_type_node);
12703 cp_missing_noreturn_ok_p (tree decl)
12705 /* A missing noreturn is ok for the `main' function. */
12706 return DECL_MAIN_P (decl);
12709 /* Return the COMDAT group into which DECL should be placed. */
12712 cxx_comdat_group (tree decl)
12716 /* Virtual tables, construction virtual tables, and virtual table
12717 tables all go in a single COMDAT group, named after the primary
12719 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12720 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12721 /* For all other DECLs, the COMDAT group is the mangled name of the
12722 declaration itself. */
12725 while (DECL_THUNK_P (decl))
12727 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12728 into the same section as the target function. In that case
12729 we must return target's name. */
12730 tree target = THUNK_TARGET (decl);
12731 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12732 && DECL_SECTION_NAME (target) != NULL
12733 && DECL_ONE_ONLY (target))
12738 name = DECL_ASSEMBLER_NAME (decl);
12744 #include "gt-cp-decl.h"