1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
58 static tree grokparms (tree parmlist, tree *);
59 static const char *redeclaration_error_message (tree, tree);
61 static int decl_jump_unsafe (tree);
62 static void require_complete_types_for_parms (tree);
63 static int ambi_op_p (enum tree_code);
64 static int unary_op_p (enum tree_code);
65 static void push_local_name (tree);
66 static tree grok_reference_init (tree, tree, tree, tree *);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (tree, tree, bool);
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (location_t, tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry {
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry {
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level *binding_level;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry *uses;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls;
231 VEC(tree, gc) *deferred_mark_used_calls;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes)
253 int n_template_parm_scopes = 0;
254 int seen_specialization_p = 0;
255 int innermost_specialization_p = 0;
256 struct cp_binding_level *b;
258 /* Scan through the template parameter scopes. */
259 for (b = current_binding_level;
260 b->kind == sk_template_parms;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b->explicit_spec_p)
274 if (n_template_parm_scopes == 0)
275 innermost_specialization_p = 1;
277 seen_specialization_p = 1;
279 else if (seen_specialization_p == 1)
280 return tsk_invalid_member_spec;
282 ++n_template_parm_scopes;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation)
288 if (n_template_parm_scopes != 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst;
297 return tsk_expl_inst;
300 if (n_template_parm_scopes < n_class_scopes)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms;
309 else if (n_template_parm_scopes == n_class_scopes)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes > n_class_scopes + 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label, tree old_value)
350 if (!processing_template_decl)
352 if (DECL_INITIAL (label) == NULL_TREE)
356 error ("label %q+D used but not defined", label);
357 location = input_location; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location, DECL_NAME (label));
362 warn_for_unused_label (label);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot, void *data)
375 struct named_label_entry *ent = (struct named_label_entry *) *slot;
376 tree block = (tree) data;
378 pop_label (ent->label_decl, NULL_TREE);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
383 BLOCK_VARS (block) = ent->label_decl;
385 htab_clear_slot (named_labels, slot);
391 pop_labels (tree block)
395 htab_traverse (named_labels, pop_labels_1, block);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label, tree old_value)
405 struct named_label_entry dummy;
408 pop_label (label, old_value);
410 dummy.label_decl = label;
411 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
412 htab_clear_slot (named_labels, slot);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk)
433 struct cp_binding_level *scope;
435 for (scope = current_binding_level;
436 scope && scope != enclosing_blk;
437 scope = scope->level_chain)
441 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
442 objc_volatilize_decl (decl);
444 /* Do not climb up past the current function. */
445 if (scope->kind == sk_function_parms)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot, void *data)
455 struct named_label_entry *ent = (struct named_label_entry *) *slot;
456 struct cp_binding_level *bl = (struct cp_binding_level *) data;
457 struct cp_binding_level *obl = bl->level_chain;
459 if (ent->binding_level == bl)
463 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
464 if (decl_jump_unsafe (decl))
465 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
467 ent->binding_level = obl;
468 ent->names_in_scope = obl->names;
472 ent->in_try_scope = true;
475 ent->in_catch_scope = true;
478 ent->in_omp_scope = true;
486 struct named_label_use_entry *use;
488 for (use = ent->uses; use ; use = use->next)
489 if (use->binding_level == bl)
491 use->binding_level = obl;
492 use->names_in_scope = obl->names;
493 if (bl->kind == sk_omp)
494 use->in_omp_scope = true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep, int reverse, int functionbody)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp = functionbody;
524 int real_functionbody;
528 int leaving_for_scope;
531 timevar_push (TV_NAME_LOOKUP);
536 gcc_assert (current_binding_level->kind != sk_class);
538 real_functionbody = (current_binding_level->kind == sk_cleanup
539 ? ((functionbody = 0), tmp) : functionbody);
540 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
542 gcc_assert (!VEC_length(cp_class_binding,
543 current_binding_level->class_shadowed));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep == 0 || keep == 1);
550 if (current_binding_level->keep)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun && !functionbody && named_labels)
556 htab_traverse (named_labels, poplevel_named_label_1,
557 current_binding_level);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level->names
565 = decls = nreverse (current_binding_level->names);
567 decls = current_binding_level->names;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep == 1 || functionbody)
574 block = make_node (BLOCK);
575 if (block != NULL_TREE)
577 BLOCK_VARS (block) = decls;
578 BLOCK_SUBBLOCKS (block) = subblocks;
581 /* In each subblock, record that this is its superior. */
583 for (link = subblocks; link; link = BLOCK_CHAIN (link))
584 BLOCK_SUPERCONTEXT (link) = block;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl)
596 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
597 if (TREE_CODE (decl) == VAR_DECL
598 && ! TREE_USED (decl)
599 && ! DECL_IN_SYSTEM_HEADER (decl)
600 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
601 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link = decls; link; link = TREE_CHAIN (link))
606 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
609 tree name = DECL_NAME (link);
613 ob = outer_binding (name,
614 IDENTIFIER_BINDING (name),
617 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
619 ns_binding = NULL_TREE;
621 if (ob && ob->scope == current_binding_level->level_chain)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name, link);
630 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
631 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name, link);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level->level_chain->dead_vars_from_for
661 = tree_cons (NULL_TREE, link,
662 current_binding_level->level_chain->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name)->scope
668 = current_binding_level->level_chain;
675 /* Remove the binding. */
678 if (TREE_CODE (decl) == TREE_LIST)
679 decl = TREE_VALUE (decl);
682 if (TREE_CODE (name) == OVERLOAD)
683 name = OVL_FUNCTION (name);
685 gcc_assert (DECL_P (name));
686 pop_binding (DECL_NAME (name), decl);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link = current_binding_level->dead_vars_from_for;
693 link; link = TREE_CHAIN (link))
694 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link = current_binding_level->type_shadowed;
698 link; link = TREE_CHAIN (link))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link = current_binding_level->shadowed_labels;
704 link = TREE_CHAIN (link))
705 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d = &BLOCK_VARS (block); *d; )
719 if (TREE_CODE (*d) == TREE_LIST)
720 *d = TREE_CHAIN (*d);
722 d = &TREE_CHAIN (*d);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block) = 0;
737 kind = current_binding_level->kind;
738 if (kind == sk_cleanup)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt = pop_stmt_list (current_binding_level->statement_list);
746 stmt = c_build_bind_expr (input_location, block, stmt);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
756 DECL_INITIAL (current_function_decl) = block;
759 current_binding_level->blocks
760 = chainon (current_binding_level->blocks, block);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, subblocks);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind == sk_cleanup)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
791 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
793 result |= (*f) (name_space, data);
795 for (; current; current = TREE_CHAIN (current))
796 result |= walk_namespaces_r (current, f, data);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f, void* data)
807 return walk_namespaces_r (global_namespace, f, data);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space, void* data)
817 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
818 VEC(tree,gc) *statics = level->static_decls;
819 tree *vec = VEC_address (tree, statics);
820 int len = VEC_length (tree, statics);
821 int last_time = (data != 0);
825 check_global_declarations (vec, len);
826 emit_debug_global_declarations (vec, len);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec, len);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name, tree type)
845 decl = build_decl (input_location, TYPE_DECL, name, type);
846 DECL_ARTIFICIAL (decl) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
851 TYPE_NAME (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 #ifdef NO_IMPLICIT_EXTERN_C
936 /* A new declaration doesn't match a built-in one unless it
937 is also extern "C". */
938 if (DECL_BUILT_IN (olddecl)
939 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1063 permerror (input_location, "previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1117 unsigned olddecl_uid = DECL_UID (olddecl);
1118 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1119 int new_defines_function = 0;
1120 tree new_template_info;
1122 if (newdecl == olddecl)
1125 types_match = decls_match (newdecl, olddecl);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl) == error_mark_node
1133 || TREE_TYPE (olddecl) == error_mark_node)
1134 return error_mark_node;
1136 if (DECL_P (olddecl)
1137 && TREE_CODE (newdecl) == FUNCTION_DECL
1138 && TREE_CODE (olddecl) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1141 if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (newdecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl)
1150 && DECL_UNINLINABLE (olddecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl);
1158 else if (DECL_DECLARED_INLINE_P (olddecl)
1159 && DECL_UNINLINABLE (newdecl)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1162 warning (OPT_Wattributes, "function %q+D redeclared with "
1163 "attribute noinline", newdecl);
1164 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1174 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl))
1186 warning (OPT_Wshadow, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1216 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1221 else if (TREE_VALUE (t2) == fileptr_type_node)
1223 tree t = TREE_VALUE (t1);
1225 if (TREE_CODE (t) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1231 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1235 types_match = decls_match (newdecl, olddecl);
1237 return duplicate_decls (newdecl, olddecl,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1242 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1245 else if ((DECL_EXTERN_C_P (newdecl)
1246 && DECL_EXTERN_C_P (olddecl))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl))
1254 warning (0, "new declaration %q#D", newdecl);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl, olddecl);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl))
1275 tree type = TREE_TYPE (newdecl);
1276 tree attribs = (*targetm.merge_type_attributes)
1277 (TREE_TYPE (olddecl), type);
1279 type = cp_build_type_attribute_variant (type, attribs);
1280 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl)
1287 && TREE_NOTHROW (newdecl)
1288 && !TREE_NOTHROW (olddecl)
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1292 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl) = 0;
1298 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl) = 1;
1303 TREE_PUBLIC (olddecl) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1309 COPY_DECL_RTL (newdecl, olddecl);
1312 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1321 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1324 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1325 && TREE_CODE (newdecl) != TYPE_DECL)
1326 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1327 && TREE_CODE (olddecl) != TYPE_DECL))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1339 || (TREE_CODE (olddecl) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl);
1345 if (TREE_CODE (olddecl) == TREE_LIST)
1346 olddecl = TREE_VALUE (olddecl);
1347 error ("previous declaration of %q+#D", olddecl);
1349 return error_mark_node;
1351 else if (!types_match)
1353 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1366 error ("declaration of template %q#D", newdecl);
1367 error ("conflicts with previous declaration %q+#D", olddecl);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1374 DECL_TEMPLATE_PARMS (olddecl))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1378 TREE_TYPE (TREE_TYPE (olddecl))))
1380 error ("new declaration %q#D", newdecl);
1381 error ("ambiguates old declaration %q+#D", olddecl);
1385 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1387 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1396 error ("new declaration %q#D", newdecl);
1397 error ("ambiguates old declaration %q+#D", olddecl);
1398 return error_mark_node;
1405 error ("conflicting declaration %q#D", newdecl);
1406 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1407 return error_mark_node;
1410 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1412 && (!DECL_TEMPLATE_INFO (newdecl)
1413 || (DECL_TI_TEMPLATE (newdecl)
1414 != DECL_TI_TEMPLATE (olddecl))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1416 && (!DECL_TEMPLATE_INFO (olddecl)
1417 || (DECL_TI_TEMPLATE (olddecl)
1418 != DECL_TI_TEMPLATE (newdecl))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1430 && !DECL_USE_TEMPLATE (newdecl))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1432 && !DECL_USE_TEMPLATE (olddecl))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl)
1448 && (DECL_NAMESPACE_ALIAS (newdecl)
1449 == DECL_NAMESPACE_ALIAS (olddecl)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl);
1459 error ("previous declaration of namespace %q+D here", olddecl);
1460 return error_mark_node;
1464 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1467 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1468 if (DECL_NAME (olddecl) != NULL_TREE)
1469 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl);
1472 return error_mark_node;
1474 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1481 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1482 "follows non-prototype definition here");
1484 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1485 || TREE_CODE (olddecl) == VAR_DECL)
1486 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1489 If two declarations of the same function or object
1490 specify different linkage-specifications ..., the program
1491 is ill-formed.... Except for functions with C++ linkage,
1492 a function declaration without a linkage specification
1493 shall not precede the first linkage specification for
1494 that function. A function can be declared without a
1495 linkage specification after an explicit linkage
1496 specification has been seen; the linkage explicitly
1497 specified in the earlier declaration is not affected by
1498 such a function declaration.
1500 DR 563 raises the question why the restrictions on
1501 functions should not also apply to objects. Older
1502 versions of G++ silently ignore the linkage-specification
1510 which is clearly wrong. Therefore, we now treat objects
1512 if (current_lang_depth () == 0)
1514 /* There is no explicit linkage-specification, so we use
1515 the linkage from the previous declaration. */
1516 if (!DECL_LANG_SPECIFIC (newdecl))
1517 retrofit_lang_decl (newdecl);
1518 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1522 error ("previous declaration of %q+#D with %qL linkage",
1523 olddecl, DECL_LANGUAGE (olddecl));
1524 error ("conflicts with new declaration with %qL linkage",
1525 DECL_LANGUAGE (newdecl));
1529 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1531 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1533 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1534 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1537 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1538 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1540 for (; t1 && t1 != void_list_node;
1541 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1542 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1544 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1547 permerror (input_location, "default argument given for parameter %d of %q#D",
1549 permerror (input_location, "after previous specification in %q+#D", olddecl);
1553 error ("default argument given for parameter %d of %q#D",
1555 error ("after previous specification in %q+#D",
1562 /* Do not merge an implicit typedef with an explicit one. In:
1566 typedef class A A __attribute__ ((foo));
1568 the attribute should apply only to the typedef. */
1569 if (TREE_CODE (olddecl) == TYPE_DECL
1570 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1571 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1574 /* If new decl is `static' and an `extern' was seen previously,
1576 warn_extern_redeclared_static (newdecl, olddecl);
1578 /* We have committed to returning 1 at this point. */
1579 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1581 /* Now that functions must hold information normally held
1582 by field decls, there is extra work to do so that
1583 declaration information does not get destroyed during
1585 if (DECL_VINDEX (olddecl))
1586 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1587 if (DECL_CONTEXT (olddecl))
1588 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1589 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1590 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1591 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1592 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1593 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1594 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1595 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1596 SET_OVERLOADED_OPERATOR_CODE
1597 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1598 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1600 /* Optionally warn about more than one declaration for the same
1601 name, but don't warn about a function declaration followed by a
1603 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1604 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1605 /* Don't warn about extern decl followed by definition. */
1606 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1607 /* Don't warn about friends, let add_friend take care of it. */
1608 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1610 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1611 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1614 if (DECL_DELETED_FN (newdecl))
1616 error ("deleted definition of %qD", newdecl);
1617 error ("after previous declaration %q+D", olddecl);
1621 /* Deal with C++: must preserve virtual function table size. */
1622 if (TREE_CODE (olddecl) == TYPE_DECL)
1624 tree newtype = TREE_TYPE (newdecl);
1625 tree oldtype = TREE_TYPE (olddecl);
1627 if (newtype != error_mark_node && oldtype != error_mark_node
1628 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1629 CLASSTYPE_FRIEND_CLASSES (newtype)
1630 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1632 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1635 /* Copy all the DECL_... slots specified in the new decl
1636 except for any that we copy here from the old type. */
1637 DECL_ATTRIBUTES (newdecl)
1638 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1640 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1644 old_result = DECL_TEMPLATE_RESULT (olddecl);
1645 new_result = DECL_TEMPLATE_RESULT (newdecl);
1646 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1647 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1648 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1649 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1651 DECL_ATTRIBUTES (old_result)
1652 = (*targetm.merge_decl_attributes) (old_result, new_result);
1654 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1656 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1657 && DECL_INITIAL (new_result))
1659 if (DECL_INITIAL (old_result))
1660 DECL_UNINLINABLE (old_result) = 1;
1662 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1663 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1664 DECL_NOT_REALLY_EXTERN (old_result)
1665 = DECL_NOT_REALLY_EXTERN (new_result);
1666 DECL_INTERFACE_KNOWN (old_result)
1667 = DECL_INTERFACE_KNOWN (new_result);
1668 DECL_DECLARED_INLINE_P (old_result)
1669 = DECL_DECLARED_INLINE_P (new_result);
1670 DECL_DISREGARD_INLINE_LIMITS (old_result)
1671 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1676 DECL_DECLARED_INLINE_P (old_result)
1677 |= DECL_DECLARED_INLINE_P (new_result);
1678 DECL_DISREGARD_INLINE_LIMITS (old_result)
1679 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1680 check_redeclaration_exception_specification (newdecl, olddecl);
1684 /* If the new declaration is a definition, update the file and
1685 line information on the declaration, and also make
1686 the old declaration the same definition. */
1687 if (DECL_INITIAL (new_result) != NULL_TREE)
1689 DECL_SOURCE_LOCATION (olddecl)
1690 = DECL_SOURCE_LOCATION (old_result)
1691 = DECL_SOURCE_LOCATION (newdecl);
1692 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1693 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1696 DECL_ARGUMENTS (old_result)
1697 = DECL_ARGUMENTS (new_result);
1698 for (parm = DECL_ARGUMENTS (old_result); parm;
1699 parm = TREE_CHAIN (parm))
1700 DECL_CONTEXT (parm) = old_result;
1709 /* Automatically handles default parameters. */
1710 tree oldtype = TREE_TYPE (olddecl);
1713 /* Merge the data types specified in the two decls. */
1714 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1716 /* If merge_types produces a non-typedef type, just use the old type. */
1717 if (TREE_CODE (newdecl) == TYPE_DECL
1718 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1721 if (TREE_CODE (newdecl) == VAR_DECL)
1723 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1724 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1725 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1726 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1727 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1728 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1730 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1731 if (DECL_LANG_SPECIFIC (olddecl)
1732 && CP_DECL_THREADPRIVATE_P (olddecl))
1734 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1735 if (!DECL_LANG_SPECIFIC (newdecl))
1736 retrofit_lang_decl (newdecl);
1738 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1739 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1743 /* Do this after calling `merge_types' so that default
1744 parameters don't confuse us. */
1745 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 check_redeclaration_exception_specification (newdecl, olddecl);
1747 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1749 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1750 check_default_args (newdecl);
1752 /* Lay the type out, unless already done. */
1753 if (! same_type_p (newtype, oldtype)
1754 && TREE_TYPE (newdecl) != error_mark_node
1755 && !(processing_template_decl && uses_template_parms (newdecl)))
1756 layout_type (TREE_TYPE (newdecl));
1758 if ((TREE_CODE (newdecl) == VAR_DECL
1759 || TREE_CODE (newdecl) == PARM_DECL
1760 || TREE_CODE (newdecl) == RESULT_DECL
1761 || TREE_CODE (newdecl) == FIELD_DECL
1762 || TREE_CODE (newdecl) == TYPE_DECL)
1763 && !(processing_template_decl && uses_template_parms (newdecl)))
1764 layout_decl (newdecl, 0);
1766 /* Merge the type qualifiers. */
1767 if (TREE_READONLY (newdecl))
1768 TREE_READONLY (olddecl) = 1;
1769 if (TREE_THIS_VOLATILE (newdecl))
1770 TREE_THIS_VOLATILE (olddecl) = 1;
1771 if (TREE_NOTHROW (newdecl))
1772 TREE_NOTHROW (olddecl) = 1;
1774 /* Merge deprecatedness. */
1775 if (TREE_DEPRECATED (newdecl))
1776 TREE_DEPRECATED (olddecl) = 1;
1778 /* Preserve function specific target and optimization options */
1779 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1781 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1782 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1783 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1784 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1786 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1787 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1788 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1789 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1792 /* Merge the initialization information. */
1793 if (DECL_INITIAL (newdecl) == NULL_TREE
1794 && DECL_INITIAL (olddecl) != NULL_TREE)
1796 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1797 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1798 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1800 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1801 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1805 /* Merge the section attribute.
1806 We want to issue an error if the sections conflict but that must be
1807 done later in decl_attributes since we are called before attributes
1809 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1810 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1814 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1815 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1816 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1817 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1818 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1819 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1820 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1821 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1822 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1823 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1824 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1825 /* Keep the old RTL. */
1826 COPY_DECL_RTL (olddecl, newdecl);
1828 else if (TREE_CODE (newdecl) == VAR_DECL
1829 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1831 /* Keep the old RTL. We cannot keep the old RTL if the old
1832 declaration was for an incomplete object and the new
1833 declaration is not since many attributes of the RTL will
1835 COPY_DECL_RTL (olddecl, newdecl);
1838 /* If cannot merge, then use the new type and qualifiers,
1839 and don't preserve the old rtl. */
1842 /* Clean out any memory we had of the old declaration. */
1843 tree oldstatic = value_member (olddecl, static_aggregates);
1845 TREE_VALUE (oldstatic) = error_mark_node;
1847 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1848 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1849 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1850 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1853 /* Merge the storage class information. */
1854 merge_weak (newdecl, olddecl);
1856 if (DECL_ONE_ONLY (olddecl))
1857 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1859 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1860 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1861 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1862 if (! DECL_EXTERNAL (olddecl))
1863 DECL_EXTERNAL (newdecl) = 0;
1865 new_template_info = NULL_TREE;
1866 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1868 bool new_redefines_gnu_inline = false;
1870 if (new_defines_function
1871 && ((DECL_INTERFACE_KNOWN (olddecl)
1872 && TREE_CODE (olddecl) == FUNCTION_DECL)
1873 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1874 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1875 == FUNCTION_DECL))))
1879 if (TREE_CODE (fn) == TEMPLATE_DECL)
1880 fn = DECL_TEMPLATE_RESULT (olddecl);
1882 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1885 if (!new_redefines_gnu_inline)
1887 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1888 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1889 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1891 DECL_TEMPLATE_INSTANTIATED (newdecl)
1892 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1894 /* If the OLDDECL is an instantiation and/or specialization,
1895 then the NEWDECL must be too. But, it may not yet be marked
1896 as such if the caller has created NEWDECL, but has not yet
1897 figured out that it is a redeclaration. */
1898 if (!DECL_USE_TEMPLATE (newdecl))
1899 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1901 /* Don't really know how much of the language-specific
1902 values we should copy from old to new. */
1903 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1904 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1905 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1906 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1908 if (LANG_DECL_HAS_MIN (newdecl))
1910 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1911 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1912 if (DECL_TEMPLATE_INFO (newdecl))
1913 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1914 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1916 /* Only functions have these fields. */
1917 if (TREE_CODE (newdecl) == FUNCTION_DECL
1918 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1920 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1921 olddecl_friend = DECL_FRIEND_P (olddecl);
1922 hidden_friend = (DECL_ANTICIPATED (olddecl)
1923 && DECL_HIDDEN_FRIEND_P (olddecl)
1924 && newdecl_is_friend);
1925 DECL_BEFRIENDING_CLASSES (newdecl)
1926 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1927 DECL_BEFRIENDING_CLASSES (olddecl));
1928 /* DECL_THUNKS is only valid for virtual functions,
1929 otherwise it is a DECL_FRIEND_CONTEXT. */
1930 if (DECL_VIRTUAL_P (newdecl))
1931 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1939 /* Merge parameter attributes. */
1940 tree oldarg, newarg;
1941 for (oldarg = DECL_ARGUMENTS(olddecl),
1942 newarg = DECL_ARGUMENTS(newdecl);
1944 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1945 DECL_ATTRIBUTES (newarg)
1946 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1947 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1950 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1951 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1953 /* If newdecl is not a specialization, then it is not a
1954 template-related function at all. And that means that we
1955 should have exited above, returning 0. */
1956 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1958 if (TREE_USED (olddecl))
1959 /* From [temp.expl.spec]:
1961 If a template, a member template or the member of a class
1962 template is explicitly specialized then that
1963 specialization shall be declared before the first use of
1964 that specialization that would cause an implicit
1965 instantiation to take place, in every translation unit in
1966 which such a use occurs. */
1967 error ("explicit specialization of %qD after first use",
1970 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1972 /* Don't propagate visibility from the template to the
1973 specialization here. We'll do that in determine_visibility if
1975 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1977 /* [temp.expl.spec/14] We don't inline explicit specialization
1978 just because the primary template says so. */
1980 else if (new_defines_function && DECL_INITIAL (olddecl))
1982 /* Never inline re-defined extern inline functions.
1983 FIXME: this could be better handled by keeping both
1984 function as separate declarations. */
1985 DECL_UNINLINABLE (newdecl) = 1;
1989 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1990 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1992 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1994 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1995 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1997 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1998 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1999 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2000 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2003 /* Preserve abstractness on cloned [cd]tors. */
2004 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2006 /* Update newdecl's parms to point at olddecl. */
2007 for (parm = DECL_ARGUMENTS (newdecl); parm;
2008 parm = TREE_CHAIN (parm))
2009 DECL_CONTEXT (parm) = olddecl;
2013 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2014 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2015 COPY_DECL_RTL (newdecl, olddecl);
2017 if (! types_match || new_defines_function)
2019 /* These need to be copied so that the names are available.
2020 Note that if the types do match, we'll preserve inline
2021 info and other bits, but if not, we won't. */
2022 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2023 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2025 if (new_defines_function)
2026 /* If defining a function declared with other language
2027 linkage, use the previously declared language linkage. */
2028 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2029 else if (types_match)
2031 /* If redeclaring a builtin function, and not a definition,
2032 it stays built in. */
2033 if (DECL_BUILT_IN (olddecl))
2035 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2036 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2037 /* If we're keeping the built-in definition, keep the rtl,
2038 regardless of declaration matches. */
2039 COPY_DECL_RTL (olddecl, newdecl);
2042 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2043 /* Don't clear out the arguments if we're just redeclaring a
2045 if (DECL_ARGUMENTS (olddecl))
2046 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2049 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2050 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2052 /* Now preserve various other info from the definition. */
2053 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2054 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2055 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2056 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2058 /* Warn about conflicting visibility specifications. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2060 && DECL_VISIBILITY_SPECIFIED (newdecl)
2061 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2063 warning_at (input_location, OPT_Wattributes,
2064 "%q+D: visibility attribute ignored because it", newdecl);
2065 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2066 "conflicts with previous declaration here");
2068 /* Choose the declaration which specified visibility. */
2069 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2071 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2072 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2074 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2075 so keep this behavior. */
2076 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2078 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2079 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2082 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2083 with that from NEWDECL below. */
2084 if (DECL_LANG_SPECIFIC (olddecl))
2086 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2087 != DECL_LANG_SPECIFIC (newdecl));
2088 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2091 /* Merge the USED information. */
2092 if (TREE_USED (olddecl))
2093 TREE_USED (newdecl) = 1;
2094 else if (TREE_USED (newdecl))
2095 TREE_USED (olddecl) = 1;
2097 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2101 function_size = sizeof (struct tree_decl_common);
2103 memcpy ((char *) olddecl + sizeof (struct tree_common),
2104 (char *) newdecl + sizeof (struct tree_common),
2105 function_size - sizeof (struct tree_common));
2107 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2108 (char *) newdecl + sizeof (struct tree_decl_common),
2109 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2110 if (new_template_info)
2111 /* If newdecl is a template instantiation, it is possible that
2112 the following sequence of events has occurred:
2114 o A friend function was declared in a class template. The
2115 class template was instantiated.
2117 o The instantiation of the friend declaration was
2118 recorded on the instantiation list, and is newdecl.
2120 o Later, however, instantiate_class_template called pushdecl
2121 on the newdecl to perform name injection. But, pushdecl in
2122 turn called duplicate_decls when it discovered that another
2123 declaration of a global function with the same name already
2126 o Here, in duplicate_decls, we decided to clobber newdecl.
2128 If we're going to do that, we'd better make sure that
2129 olddecl, and not newdecl, is on the list of
2130 instantiations so that if we try to do the instantiation
2131 again we won't get the clobbered declaration. */
2132 reregister_specialization (newdecl,
2138 size_t size = tree_code_size (TREE_CODE (olddecl));
2139 memcpy ((char *) olddecl + sizeof (struct tree_common),
2140 (char *) newdecl + sizeof (struct tree_common),
2141 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2142 switch (TREE_CODE (olddecl))
2152 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2153 (char *) newdecl + sizeof (struct tree_decl_common),
2154 size - sizeof (struct tree_decl_common)
2155 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2159 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2160 (char *) newdecl + sizeof (struct tree_decl_common),
2161 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2162 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2166 DECL_UID (olddecl) = olddecl_uid;
2168 DECL_FRIEND_P (olddecl) = 1;
2171 DECL_ANTICIPATED (olddecl) = 1;
2172 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2175 /* NEWDECL contains the merged attribute lists.
2176 Update OLDDECL to be the same. */
2177 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2179 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2180 so that encode_section_info has a chance to look at the new decl
2181 flags and attributes. */
2182 if (DECL_RTL_SET_P (olddecl)
2183 && (TREE_CODE (olddecl) == FUNCTION_DECL
2184 || (TREE_CODE (olddecl) == VAR_DECL
2185 && TREE_STATIC (olddecl))))
2186 make_decl_rtl (olddecl);
2188 /* The NEWDECL will no longer be needed. Because every out-of-class
2189 declaration of a member results in a call to duplicate_decls,
2190 freeing these nodes represents in a significant savings. */
2196 /* Return zero if the declaration NEWDECL is valid
2197 when the declaration OLDDECL (assumed to be for the same name)
2198 has already been seen.
2199 Otherwise return an error message format string with a %s
2200 where the identifier should go. */
2203 redeclaration_error_message (tree newdecl, tree olddecl)
2205 if (TREE_CODE (newdecl) == TYPE_DECL)
2207 /* Because C++ can put things into name space for free,
2208 constructs like "typedef struct foo { ... } foo"
2209 would look like an erroneous redeclaration. */
2210 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2213 return "redefinition of %q#D";
2215 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2217 /* If this is a pure function, its olddecl will actually be
2218 the original initialization to `0' (which we force to call
2219 abort()). Don't complain about redefinition in this case. */
2220 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2221 && DECL_INITIAL (olddecl) == NULL_TREE)
2224 /* If both functions come from different namespaces, this is not
2225 a redeclaration - this is a conflict with a used function. */
2226 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2227 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2228 && ! decls_match (olddecl, newdecl))
2229 return "%qD conflicts with used function";
2231 /* We'll complain about linkage mismatches in
2232 warn_extern_redeclared_static. */
2234 /* Defining the same name twice is no good. */
2235 if (DECL_INITIAL (olddecl) != NULL_TREE
2236 && DECL_INITIAL (newdecl) != NULL_TREE)
2238 if (DECL_NAME (olddecl) == NULL_TREE)
2239 return "%q#D not declared in class";
2240 else if (!GNU_INLINE_P (olddecl)
2241 || GNU_INLINE_P (newdecl))
2242 return "redefinition of %q#D";
2245 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2247 bool olda = GNU_INLINE_P (olddecl);
2248 bool newa = GNU_INLINE_P (newdecl);
2253 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2255 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2265 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2267 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2268 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2269 return "redefinition of %q#D";
2273 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2274 || (DECL_TEMPLATE_RESULT (newdecl)
2275 == DECL_TEMPLATE_RESULT (olddecl)))
2278 nt = DECL_TEMPLATE_RESULT (newdecl);
2279 if (DECL_TEMPLATE_INFO (nt))
2280 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2281 ot = DECL_TEMPLATE_RESULT (olddecl);
2282 if (DECL_TEMPLATE_INFO (ot))
2283 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2284 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2285 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2286 return "redefinition of %q#D";
2288 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2290 bool olda = GNU_INLINE_P (ot);
2291 bool newa = GNU_INLINE_P (nt);
2296 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2298 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2302 /* Core issue #226 (C++0x):
2304 If a friend function template declaration specifies a
2305 default template-argument, that declaration shall be a
2306 definition and shall be the only declaration of the
2307 function template in the translation unit. */
2308 if ((cxx_dialect != cxx98)
2309 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2310 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2311 /*is_primary=*/1, /*is_partial=*/0,
2312 /*is_friend_decl=*/2))
2313 return "redeclaration of friend %q#D may not have default template arguments";
2317 else if (TREE_CODE (newdecl) == VAR_DECL
2318 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2319 && (! DECL_LANG_SPECIFIC (olddecl)
2320 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2321 || DECL_THREAD_LOCAL_P (newdecl)))
2323 /* Only variables can be thread-local, and all declarations must
2324 agree on this property. */
2325 if (DECL_THREAD_LOCAL_P (newdecl))
2326 return "thread-local declaration of %q#D follows "
2327 "non-thread-local declaration";
2329 return "non-thread-local declaration of %q#D follows "
2330 "thread-local declaration";
2332 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2334 /* The objects have been declared at namespace scope. If either
2335 is a member of an anonymous union, then this is an invalid
2336 redeclaration. For example:
2342 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2343 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2344 return "redeclaration of %q#D";
2345 /* If at least one declaration is a reference, there is no
2346 conflict. For example:
2352 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2354 /* Reject two definitions. */
2355 return "redefinition of %q#D";
2359 /* Objects declared with block scope: */
2360 /* Reject two definitions, and reject a definition
2361 together with an external reference. */
2362 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2363 return "redeclaration of %q#D";
2368 /* Hash and equality functions for the named_label table. */
2371 named_label_entry_hash (const void *data)
2373 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2374 return DECL_UID (ent->label_decl);
2378 named_label_entry_eq (const void *a, const void *b)
2380 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2381 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2382 return ent_a->label_decl == ent_b->label_decl;
2385 /* Create a new label, named ID. */
2388 make_label_decl (tree id, int local_p)
2390 struct named_label_entry *ent;
2394 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2396 DECL_CONTEXT (decl) = current_function_decl;
2397 DECL_MODE (decl) = VOIDmode;
2398 C_DECLARED_LABEL_FLAG (decl) = local_p;
2400 /* Say where one reference is to the label, for the sake of the
2401 error if it is not defined. */
2402 DECL_SOURCE_LOCATION (decl) = input_location;
2404 /* Record the fact that this identifier is bound to this label. */
2405 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2407 /* Create the label htab for the function on demand. */
2409 named_labels = htab_create_ggc (13, named_label_entry_hash,
2410 named_label_entry_eq, NULL);
2412 /* Record this label on the list of labels used in this function.
2413 We do this before calling make_label_decl so that we get the
2414 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2415 ent = GGC_CNEW (struct named_label_entry);
2416 ent->label_decl = decl;
2418 slot = htab_find_slot (named_labels, ent, INSERT);
2419 gcc_assert (*slot == NULL);
2425 /* Look for a label named ID in the current function. If one cannot
2426 be found, create one. (We keep track of used, but undefined,
2427 labels, and complain about them at the end of a function.) */
2430 lookup_label (tree id)
2434 timevar_push (TV_NAME_LOOKUP);
2435 /* You can't use labels at global scope. */
2436 if (current_function_decl == NULL_TREE)
2438 error ("label %qE referenced outside of any function", id);
2439 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2442 /* See if we've already got this label. */
2443 decl = IDENTIFIER_LABEL_VALUE (id);
2444 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2445 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2447 decl = make_label_decl (id, /*local_p=*/0);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2451 /* Declare a local label named ID. */
2454 declare_local_label (tree id)
2458 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2459 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2460 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2461 current_binding_level->shadowed_labels);
2462 current_binding_level->shadowed_labels = shadow;
2464 decl = make_label_decl (id, /*local_p=*/1);
2465 TREE_VALUE (shadow) = decl;
2470 /* Returns nonzero if it is ill-formed to jump past the declaration of
2471 DECL. Returns 2 if it's also a real problem. */
2474 decl_jump_unsafe (tree decl)
2476 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2477 with automatic storage duration is not in scope to a point where it is
2478 in scope is ill-formed unless the variable has scalar type, class type
2479 with a trivial default constructor and a trivial destructor, a
2480 cv-qualified version of one of these types, or an array of one of the
2481 preceding types and is declared without an initializer (8.5). */
2482 tree type = TREE_TYPE (decl);
2484 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2485 || type == error_mark_node)
2488 type = strip_array_types (type);
2490 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2491 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2494 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2500 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2503 identify_goto (tree decl, const location_t *locus)
2506 permerror (input_location, "jump to label %qD", decl);
2508 permerror (input_location, "jump to case label");
2510 permerror (*locus, " from here");
2513 /* Check that a single previously seen jump to a newly defined label
2514 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2515 the jump context; NAMES are the names in scope in LEVEL at the jump
2516 context; LOCUS is the source position of the jump or 0. Returns
2517 true if all is well. */
2520 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2521 bool exited_omp, const location_t *locus)
2523 struct cp_binding_level *b;
2524 bool identified = false, saw_eh = false, saw_omp = false;
2528 identify_goto (decl, locus);
2529 error (" exits OpenMP structured block");
2530 identified = saw_omp = true;
2533 for (b = current_binding_level; b ; b = b->level_chain)
2535 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2537 for (new_decls = b->names; new_decls != old_decls;
2538 new_decls = TREE_CHAIN (new_decls))
2540 int problem = decl_jump_unsafe (new_decls);
2546 identify_goto (decl, locus);
2550 error (" crosses initialization of %q+#D", new_decls);
2552 permerror (input_location, " enters scope of %q+#D which has "
2553 "non-trivial destructor", new_decls);
2558 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2562 identify_goto (decl, locus);
2565 if (b->kind == sk_try)
2566 error (" enters try block");
2568 error (" enters catch block");
2571 if (b->kind == sk_omp && !saw_omp)
2575 identify_goto (decl, locus);
2578 error (" enters OpenMP structured block");
2587 check_previous_goto (tree decl, struct named_label_use_entry *use)
2589 check_previous_goto_1 (decl, use->binding_level,
2590 use->names_in_scope, use->in_omp_scope,
2591 &use->o_goto_locus);
2595 check_switch_goto (struct cp_binding_level* level)
2597 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2600 /* Check that a new jump to a label DECL is OK. Called by
2601 finish_goto_stmt. */
2604 check_goto (tree decl)
2606 struct named_label_entry *ent, dummy;
2607 bool saw_catch = false, identified = false;
2610 /* We can't know where a computed goto is jumping.
2611 So we assume that it's OK. */
2612 if (TREE_CODE (decl) != LABEL_DECL)
2615 /* We didn't record any information about this label when we created it,
2616 and there's not much point since it's trivial to analyze as a return. */
2617 if (decl == cdtor_label)
2620 dummy.label_decl = decl;
2621 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2622 gcc_assert (ent != NULL);
2624 /* If the label hasn't been defined yet, defer checking. */
2625 if (! DECL_INITIAL (decl))
2627 struct named_label_use_entry *new_use;
2629 /* Don't bother creating another use if the last goto had the
2630 same data, and will therefore create the same set of errors. */
2632 && ent->uses->names_in_scope == current_binding_level->names)
2635 new_use = GGC_NEW (struct named_label_use_entry);
2636 new_use->binding_level = current_binding_level;
2637 new_use->names_in_scope = current_binding_level->names;
2638 new_use->o_goto_locus = input_location;
2639 new_use->in_omp_scope = false;
2641 new_use->next = ent->uses;
2642 ent->uses = new_use;
2646 if (ent->in_try_scope || ent->in_catch_scope
2647 || ent->in_omp_scope || ent->bad_decls)
2649 permerror (input_location, "jump to label %q+D", decl);
2650 permerror (input_location, " from here");
2654 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2656 tree b = TREE_VALUE (bad);
2657 int u = decl_jump_unsafe (b);
2659 if (u > 1 && DECL_ARTIFICIAL (b))
2661 /* Can't skip init of __exception_info. */
2662 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2666 error (" skips initialization of %q+#D", b);
2668 permerror (input_location, " enters scope of %q+#D which has "
2669 "non-trivial destructor", b);
2672 if (ent->in_try_scope)
2673 error (" enters try block");
2674 else if (ent->in_catch_scope && !saw_catch)
2675 error (" enters catch block");
2677 if (ent->in_omp_scope)
2678 error (" enters OpenMP structured block");
2679 else if (flag_openmp)
2681 struct cp_binding_level *b;
2682 for (b = current_binding_level; b ; b = b->level_chain)
2684 if (b == ent->binding_level)
2686 if (b->kind == sk_omp)
2690 permerror (input_location, "jump to label %q+D", decl);
2691 permerror (input_location, " from here");
2694 error (" exits OpenMP structured block");
2701 /* Check that a return is ok wrt OpenMP structured blocks.
2702 Called by finish_return_stmt. Returns true if all is well. */
2705 check_omp_return (void)
2707 struct cp_binding_level *b;
2708 for (b = current_binding_level; b ; b = b->level_chain)
2709 if (b->kind == sk_omp)
2711 error ("invalid exit from OpenMP structured block");
2717 /* Define a label, specifying the location in the source file.
2718 Return the LABEL_DECL node for the label. */
2721 define_label (location_t location, tree name)
2723 struct named_label_entry *ent, dummy;
2724 struct cp_binding_level *p;
2727 timevar_push (TV_NAME_LOOKUP);
2729 decl = lookup_label (name);
2731 dummy.label_decl = decl;
2732 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2733 gcc_assert (ent != NULL);
2735 /* After labels, make any new cleanups in the function go into their
2736 own new (temporary) binding contour. */
2737 for (p = current_binding_level;
2738 p->kind != sk_function_parms;
2740 p->more_cleanups_ok = 0;
2742 if (name == get_identifier ("wchar_t"))
2743 permerror (input_location, "label named wchar_t");
2745 if (DECL_INITIAL (decl) != NULL_TREE)
2747 error ("duplicate label %qD", decl);
2748 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2752 struct named_label_use_entry *use;
2754 /* Mark label as having been defined. */
2755 DECL_INITIAL (decl) = error_mark_node;
2756 /* Say where in the source. */
2757 DECL_SOURCE_LOCATION (decl) = location;
2759 ent->binding_level = current_binding_level;
2760 ent->names_in_scope = current_binding_level->names;
2762 for (use = ent->uses; use ; use = use->next)
2763 check_previous_goto (decl, use);
2767 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2772 struct cp_binding_level *level;
2773 struct cp_switch *next;
2774 /* The SWITCH_STMT being built. */
2776 /* A splay-tree mapping the low element of a case range to the high
2777 element, or NULL_TREE if there is no high element. Used to
2778 determine whether or not a new case label duplicates an old case
2779 label. We need a tree, rather than simply a hash table, because
2780 of the GNU case range extension. */
2784 /* A stack of the currently active switch statements. The innermost
2785 switch statement is on the top of the stack. There is no need to
2786 mark the stack for garbage collection because it is only active
2787 during the processing of the body of a function, and we never
2788 collect at that point. */
2790 static struct cp_switch *switch_stack;
2792 /* Called right after a switch-statement condition is parsed.
2793 SWITCH_STMT is the switch statement being parsed. */
2796 push_switch (tree switch_stmt)
2798 struct cp_switch *p = XNEW (struct cp_switch);
2799 p->level = current_binding_level;
2800 p->next = switch_stack;
2801 p->switch_stmt = switch_stmt;
2802 p->cases = splay_tree_new (case_compare, NULL, NULL);
2809 struct cp_switch *cs = switch_stack;
2810 location_t switch_location;
2812 /* Emit warnings as needed. */
2813 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2814 switch_location = EXPR_LOCATION (cs->switch_stmt);
2816 switch_location = input_location;
2817 if (!processing_template_decl)
2818 c_do_switch_warnings (cs->cases, switch_location,
2819 SWITCH_STMT_TYPE (cs->switch_stmt),
2820 SWITCH_STMT_COND (cs->switch_stmt));
2822 splay_tree_delete (cs->cases);
2823 switch_stack = switch_stack->next;
2827 /* Note that we've seen a definition of a case label, and complain if this
2828 is a bad place for one. */
2831 finish_case_label (location_t loc, tree low_value, tree high_value)
2834 struct cp_binding_level *p;
2836 if (processing_template_decl)
2840 /* For templates, just add the case label; we'll do semantic
2841 analysis at instantiation-time. */
2842 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2843 return add_stmt (build_case_label (loc, low_value, high_value, label));
2846 /* Find the condition on which this switch statement depends. */
2847 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2848 if (cond && TREE_CODE (cond) == TREE_LIST)
2849 cond = TREE_VALUE (cond);
2851 if (!check_switch_goto (switch_stack->level))
2852 return error_mark_node;
2854 r = c_add_case_label (loc, switch_stack->cases, cond,
2855 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2856 low_value, high_value);
2858 /* After labels, make any new cleanups in the function go into their
2859 own new (temporary) binding contour. */
2860 for (p = current_binding_level;
2861 p->kind != sk_function_parms;
2863 p->more_cleanups_ok = 0;
2868 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2871 typename_hash (const void* k)
2874 const_tree const t = (const_tree) k;
2876 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2877 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2882 typedef struct typename_info {
2890 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2891 really of type `typename_info*' */
2894 typename_compare (const void * k1, const void * k2)
2896 const_tree const t1 = (const_tree) k1;
2897 const typename_info *const t2 = (const typename_info *) k2;
2899 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2900 && TYPE_CONTEXT (t1) == t2->scope
2901 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2902 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2903 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2906 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2907 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2909 Returns the new TYPENAME_TYPE. */
2911 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2914 build_typename_type (tree context, tree name, tree fullname,
2915 enum tag_types tag_type)
2923 if (typename_htab == NULL)
2924 typename_htab = htab_create_ggc (61, &typename_hash,
2925 &typename_compare, NULL);
2927 ti.scope = FROB_CONTEXT (context);
2929 ti.template_id = fullname;
2930 ti.enum_p = tag_type == enum_type;
2931 ti.class_p = (tag_type == class_type
2932 || tag_type == record_type
2933 || tag_type == union_type);
2934 hash = (htab_hash_pointer (ti.scope)
2935 ^ htab_hash_pointer (ti.name));
2937 /* See if we already have this type. */
2938 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2943 /* Build the TYPENAME_TYPE. */
2944 t = cxx_make_type (TYPENAME_TYPE);
2945 TYPE_CONTEXT (t) = ti.scope;
2946 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2947 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2948 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2950 /* Build the corresponding TYPE_DECL. */
2951 d = build_decl (input_location, TYPE_DECL, name, t);
2952 TYPE_NAME (TREE_TYPE (d)) = d;
2953 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2954 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2955 DECL_ARTIFICIAL (d) = 1;
2957 /* Store it in the hash table. */
2960 /* TYPENAME_TYPEs must always be compared structurally, because
2961 they may or may not resolve down to another type depending on
2962 the currently open classes. */
2963 SET_TYPE_STRUCTURAL_EQUALITY (t);
2969 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2970 provided to name the type. Returns an appropriate type, unless an
2971 error occurs, in which case error_mark_node is returned. If we
2972 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2973 return that, rather than the _TYPE it corresponds to, in other
2974 cases we look through the type decl. If TF_ERROR is set, complain
2975 about errors, otherwise be quiet. */
2978 make_typename_type (tree context, tree name, enum tag_types tag_type,
2979 tsubst_flags_t complain)
2985 if (name == error_mark_node
2986 || context == NULL_TREE
2987 || context == error_mark_node)
2988 return error_mark_node;
2992 if (!(TYPE_LANG_SPECIFIC (name)
2993 && (CLASSTYPE_IS_TEMPLATE (name)
2994 || CLASSTYPE_USE_TEMPLATE (name))))
2995 name = TYPE_IDENTIFIER (name);
2997 /* Create a TEMPLATE_ID_EXPR for the type. */
2998 name = build_nt (TEMPLATE_ID_EXPR,
2999 CLASSTYPE_TI_TEMPLATE (name),
3000 CLASSTYPE_TI_ARGS (name));
3002 else if (TREE_CODE (name) == TYPE_DECL)
3003 name = DECL_NAME (name);
3007 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3009 name = TREE_OPERAND (name, 0);
3010 if (TREE_CODE (name) == TEMPLATE_DECL)
3011 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3012 else if (TREE_CODE (name) == OVERLOAD)
3014 error ("%qD is not a type", name);
3015 return error_mark_node;
3018 if (TREE_CODE (name) == TEMPLATE_DECL)
3020 error ("%qD used without template parameters", name);
3021 return error_mark_node;
3023 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3024 gcc_assert (TYPE_P (context));
3026 if (!MAYBE_CLASS_TYPE_P (context))
3028 if (complain & tf_error)
3029 error ("%q#T is not a class", context);
3030 return error_mark_node;
3033 /* When the CONTEXT is a dependent type, NAME could refer to a
3034 dependent base class of CONTEXT. But look inside it anyway
3035 if CONTEXT is a currently open scope, in case it refers to a
3036 member of the current instantiation or a non-dependent base;
3037 lookup will stop when we hit a dependent base. */
3038 if (!dependent_scope_p (context))
3039 /* We should only set WANT_TYPE when we're a nested typename type.
3040 Then we can give better diagnostics if we find a non-type. */
3041 t = lookup_field (context, name, 0, /*want_type=*/true);
3045 if (!t && dependent_type_p (context))
3046 return build_typename_type (context, name, fullname, tag_type);
3048 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3052 if (complain & tf_error)
3053 error (want_template ? "no class template named %q#T in %q#T"
3054 : "no type named %q#T in %q#T", name, context);
3055 return error_mark_node;
3058 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3060 if (complain & tf_error)
3061 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3063 return error_mark_node;
3065 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3067 if (complain & tf_error)
3068 error ("%<typename %T::%D%> names %q#T, which is not a type",
3070 return error_mark_node;
3073 if (complain & tf_error)
3074 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3077 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3079 /*entering_scope=*/0,
3080 tf_warning_or_error | tf_user);
3082 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3088 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3089 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3090 in which case error_mark_node is returned.
3092 If PARM_LIST is non-NULL, also make sure that the template parameter
3093 list of TEMPLATE_DECL matches.
3095 If COMPLAIN zero, don't complain about any errors that occur. */
3098 make_unbound_class_template (tree context, tree name, tree parm_list,
3099 tsubst_flags_t complain)
3105 name = TYPE_IDENTIFIER (name);
3106 else if (DECL_P (name))
3107 name = DECL_NAME (name);
3108 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3110 if (!dependent_type_p (context)
3111 || currently_open_class (context))
3113 tree tmpl = NULL_TREE;
3115 if (MAYBE_CLASS_TYPE_P (context))
3116 tmpl = lookup_field (context, name, 0, false);
3118 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3120 if (complain & tf_error)
3121 error ("no class template named %q#T in %q#T", name, context);
3122 return error_mark_node;
3126 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3128 if (complain & tf_error)
3130 error ("template parameters do not match template");
3131 error ("%q+D declared here", tmpl);
3133 return error_mark_node;
3136 if (complain & tf_error)
3137 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3142 /* Build the UNBOUND_CLASS_TEMPLATE. */
3143 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3144 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3145 TREE_TYPE (t) = NULL_TREE;
3146 SET_TYPE_STRUCTURAL_EQUALITY (t);
3148 /* Build the corresponding TEMPLATE_DECL. */
3149 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3150 TYPE_NAME (TREE_TYPE (d)) = d;
3151 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3152 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3153 DECL_ARTIFICIAL (d) = 1;
3154 DECL_TEMPLATE_PARMS (d) = parm_list;
3161 /* Push the declarations of builtin types into the namespace.
3162 RID_INDEX is the index of the builtin type in the array
3163 RID_POINTERS. NAME is the name used when looking up the builtin
3164 type. TYPE is the _TYPE node for the builtin type. */
3167 record_builtin_type (enum rid rid_index,
3171 tree rname = NULL_TREE, tname = NULL_TREE;
3172 tree tdecl = NULL_TREE;
3174 if ((int) rid_index < (int) RID_MAX)
3175 rname = ridpointers[(int) rid_index];
3177 tname = get_identifier (name);
3179 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3180 eliminated. Built-in types should not be looked up name; their
3181 names are keywords that the parser can recognize. However, there
3182 is code in c-common.c that uses identifier_global_value to look
3183 up built-in types by name. */
3186 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3187 DECL_ARTIFICIAL (tdecl) = 1;
3188 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3194 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3195 DECL_ARTIFICIAL (tdecl) = 1;
3197 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3200 if (!TYPE_NAME (type))
3201 TYPE_NAME (type) = tdecl;
3204 debug_hooks->type_decl (tdecl, 0);
3207 /* Record one of the standard Java types.
3208 * Declare it as having the given NAME.
3209 * If SIZE > 0, it is the size of one of the integral types;
3210 * otherwise it is the negative of the size of one of the other types. */
3213 record_builtin_java_type (const char* name, int size)
3217 type = build_nonstandard_integer_type (size, 0);
3218 else if (size > -32)
3221 /* "__java_char" or ""__java_boolean". */
3222 type = build_nonstandard_integer_type (-size, 1);
3223 /* Get the signed type cached and attached to the unsigned type,
3224 so it doesn't get garbage-collected at "random" times,
3225 causing potential codegen differences out of different UIDs
3226 and different alias set numbers. */
3227 stype = build_nonstandard_integer_type (-size, 0);
3228 TREE_CHAIN (type) = stype;
3229 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3232 { /* "__java_float" or ""__java_double". */
3233 type = make_node (REAL_TYPE);
3234 TYPE_PRECISION (type) = - size;
3237 record_builtin_type (RID_MAX, name, type);
3238 decl = TYPE_NAME (type);
3240 /* Suppress generate debug symbol entries for these types,
3241 since for normal C++ they are just clutter.
3242 However, push_lang_context undoes this if extern "Java" is seen. */
3243 DECL_IGNORED_P (decl) = 1;
3245 TYPE_FOR_JAVA (type) = 1;
3249 /* Push a type into the namespace so that the back ends ignore it. */
3252 record_unknown_type (tree type, const char* name)
3254 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3255 TYPE_DECL, get_identifier (name), type));
3256 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3257 DECL_IGNORED_P (decl) = 1;
3258 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3259 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3260 TYPE_ALIGN (type) = 1;
3261 TYPE_USER_ALIGN (type) = 0;
3262 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3265 /* A string for which we should create an IDENTIFIER_NODE at
3268 typedef struct predefined_identifier
3270 /* The name of the identifier. */
3271 const char *const name;
3272 /* The place where the IDENTIFIER_NODE should be stored. */
3274 /* Nonzero if this is the name of a constructor or destructor. */
3275 const int ctor_or_dtor_p;
3276 } predefined_identifier;
3278 /* Create all the predefined identifiers. */
3281 initialize_predefined_identifiers (void)
3283 const predefined_identifier *pid;
3285 /* A table of identifiers to create at startup. */
3286 static const predefined_identifier predefined_identifiers[] = {
3287 { "C++", &lang_name_cplusplus, 0 },
3288 { "C", &lang_name_c, 0 },
3289 { "Java", &lang_name_java, 0 },
3290 /* Some of these names have a trailing space so that it is
3291 impossible for them to conflict with names written by users. */
3292 { "__ct ", &ctor_identifier, 1 },
3293 { "__base_ctor ", &base_ctor_identifier, 1 },
3294 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3295 { "__dt ", &dtor_identifier, 1 },
3296 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3297 { "__base_dtor ", &base_dtor_identifier, 1 },
3298 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3299 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3300 { "nelts", &nelts_identifier, 0 },
3301 { THIS_NAME, &this_identifier, 0 },
3302 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3303 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3304 { "_vptr", &vptr_identifier, 0 },
3305 { "__vtt_parm", &vtt_parm_identifier, 0 },
3306 { "::", &global_scope_name, 0 },
3307 { "std", &std_identifier, 0 },
3311 for (pid = predefined_identifiers; pid->name; ++pid)
3313 *pid->node = get_identifier (pid->name);
3314 if (pid->ctor_or_dtor_p)
3315 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3319 /* Create the predefined scalar types of C,
3320 and some nodes representing standard constants (0, 1, (void *)0).
3321 Initialize the global binding level.
3322 Make definitions for built-in primitive functions. */
3325 cxx_init_decl_processing (void)
3328 tree void_ftype_ptr;
3330 build_common_tree_nodes (flag_signed_char, false);
3332 /* Create all the identifiers we need. */
3333 initialize_predefined_identifiers ();
3335 /* Create the global variables. */
3336 push_to_top_level ();
3338 current_function_decl = NULL_TREE;
3339 current_binding_level = NULL;
3340 /* Enter the global namespace. */
3341 gcc_assert (global_namespace == NULL_TREE);
3342 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3344 TREE_PUBLIC (global_namespace) = 1;
3345 begin_scope (sk_namespace, global_namespace);
3347 current_lang_name = NULL_TREE;
3349 if (flag_visibility_ms_compat)
3350 default_visibility = VISIBILITY_HIDDEN;
3353 current_lang_name = lang_name_c;
3355 /* Create the `std' namespace. */
3356 push_namespace (std_identifier);
3357 std_node = current_namespace;
3360 c_common_nodes_and_builtins ();
3362 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3363 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3364 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3365 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3366 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3367 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3368 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3369 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3371 integer_two_node = build_int_cst (NULL_TREE, 2);
3372 integer_three_node = build_int_cst (NULL_TREE, 3);
3374 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3375 truthvalue_type_node = boolean_type_node;
3376 truthvalue_false_node = boolean_false_node;
3377 truthvalue_true_node = boolean_true_node;
3379 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3382 record_builtin_type (RID_MAX, NULL, string_type_node);
3385 delta_type_node = ptrdiff_type_node;
3386 vtable_index_type = ptrdiff_type_node;
3388 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3389 void_ftype = build_function_type (void_type_node, void_list_node);
3390 void_ftype_ptr = build_function_type (void_type_node,
3391 tree_cons (NULL_TREE,
3395 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3397 /* C++ extensions */
3399 unknown_type_node = make_node (UNKNOWN_TYPE);
3400 record_unknown_type (unknown_type_node, "unknown type");
3402 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3403 TREE_TYPE (unknown_type_node) = unknown_type_node;
3405 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3407 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3408 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3410 init_list_type_node = make_node (UNKNOWN_TYPE);
3411 record_unknown_type (init_list_type_node, "init list");
3414 /* Make sure we get a unique function type, so we can give
3415 its pointer type a name. (This wins for gdb.) */
3416 tree vfunc_type = make_node (FUNCTION_TYPE);
3417 TREE_TYPE (vfunc_type) = integer_type_node;
3418 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3419 layout_type (vfunc_type);
3421 vtable_entry_type = build_pointer_type (vfunc_type);
3423 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3426 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3427 layout_type (vtbl_type_node);
3428 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3429 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3430 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3431 layout_type (vtbl_ptr_type_node);
3432 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3434 push_namespace (get_identifier ("__cxxabiv1"));
3435 abi_node = current_namespace;
3438 global_type_node = make_node (LANG_TYPE);
3439 record_unknown_type (global_type_node, "global type");
3442 current_lang_name = lang_name_cplusplus;
3446 tree bad_alloc_type_node;
3447 tree bad_alloc_decl;
3448 tree newtype, deltype;
3449 tree ptr_ftype_sizetype;
3451 push_namespace (std_identifier);
3452 bad_alloc_id = get_identifier ("bad_alloc");
3453 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3454 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3456 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3457 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3458 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3462 = build_function_type (ptr_type_node,
3463 tree_cons (NULL_TREE,
3466 newtype = build_exception_variant
3467 (ptr_ftype_sizetype, add_exception_specifier
3468 (NULL_TREE, bad_alloc_type_node, -1));
3469 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3470 push_cp_library_fn (NEW_EXPR, newtype);
3471 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3472 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3473 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3477 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3479 /* Perform other language dependent initializations. */
3480 init_class_processing ();
3481 init_rtti_processing ();
3482 init_template_processing ();
3484 if (flag_exceptions)
3485 init_exception_processing ();
3487 if (! supports_one_only ())
3490 make_fname_decl = cp_make_fname_decl;
3491 start_fname_decls ();
3493 /* Show we use EH for cleanups. */
3494 if (flag_exceptions)
3495 using_eh_for_cleanups ();
3498 /* Generate an initializer for a function naming variable from
3499 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3500 filled in with the type of the init. */
3503 cp_fname_init (const char* name, tree *type_p)
3505 tree domain = NULL_TREE;
3507 tree init = NULL_TREE;
3512 length = strlen (name);
3513 domain = build_index_type (size_int (length));
3514 init = build_string (length + 1, name);
3517 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3518 type = build_cplus_array_type (type, domain);
3523 TREE_TYPE (init) = type;
3525 init = error_mark_node;
3530 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3531 the decl, LOC is the location to give the decl, NAME is the
3532 initialization string and TYPE_DEP indicates whether NAME depended
3533 on the type of the function. We make use of that to detect
3534 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3535 at the point of first use, so we mustn't push the decl now. */
3538 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3540 const char *const name = (type_dep && processing_template_decl
3541 ? NULL : fname_as_string (type_dep));
3543 tree init = cp_fname_init (name, &type);
3544 tree decl = build_decl (loc, VAR_DECL, id, type);
3547 free (CONST_CAST (char *, name));
3549 /* As we're using pushdecl_with_scope, we must set the context. */
3550 DECL_CONTEXT (decl) = current_function_decl;
3551 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3553 TREE_STATIC (decl) = 1;
3554 TREE_READONLY (decl) = 1;
3555 DECL_ARTIFICIAL (decl) = 1;
3557 TREE_USED (decl) = 1;
3559 if (current_function_decl)
3561 struct cp_binding_level *b = current_binding_level;
3562 while (b->level_chain->kind != sk_function_parms)
3564 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3565 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3566 LOOKUP_ONLYCONVERTING);
3569 pushdecl_top_level_and_finish (decl, init);
3575 builtin_function_1 (tree decl, tree context, bool is_global)
3577 tree id = DECL_NAME (decl);
3578 const char *name = IDENTIFIER_POINTER (id);
3580 retrofit_lang_decl (decl);
3582 /* All nesting of C++ functions is lexical; there is never a "static
3583 chain" in the sense of GNU C nested functions. */
3584 DECL_NO_STATIC_CHAIN (decl) = 1;
3586 DECL_ARTIFICIAL (decl) = 1;
3587 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3588 SET_DECL_LANGUAGE (decl, lang_c);
3589 /* Runtime library routines are, by definition, available in an
3590 external shared object. */
3591 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3592 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3594 DECL_CONTEXT (decl) = context;
3597 pushdecl_top_level (decl);
3601 /* A function in the user's namespace should have an explicit
3602 declaration before it is used. Mark the built-in function as
3603 anticipated but not actually declared. */
3604 if (name[0] != '_' || name[1] != '_')
3605 DECL_ANTICIPATED (decl) = 1;
3606 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3608 size_t len = strlen (name);
3610 /* Treat __*_chk fortification functions as anticipated as well,
3611 unless they are __builtin_*. */
3612 if (len > strlen ("___chk")
3613 && memcmp (name + len - strlen ("_chk"),
3614 "_chk", strlen ("_chk") + 1) == 0)
3615 DECL_ANTICIPATED (decl) = 1;
3622 cxx_builtin_function (tree decl)
3624 tree id = DECL_NAME (decl);
3625 const char *name = IDENTIFIER_POINTER (id);
3626 /* All builtins that don't begin with an '_' should additionally
3627 go in the 'std' namespace. */
3630 tree decl2 = copy_node(decl);
3631 push_namespace (std_identifier);
3632 builtin_function_1 (decl2, std_node, false);
3636 return builtin_function_1 (decl, NULL_TREE, false);
3639 /* Like cxx_builtin_function, but guarantee the function is added to the global
3640 scope. This is to allow function specific options to add new machine
3641 dependent builtins when the target ISA changes via attribute((target(...)))
3642 which saves space on program startup if the program does not use non-generic
3646 cxx_builtin_function_ext_scope (tree decl)
3649 tree id = DECL_NAME (decl);
3650 const char *name = IDENTIFIER_POINTER (id);
3651 /* All builtins that don't begin with an '_' should additionally
3652 go in the 'std' namespace. */
3655 tree decl2 = copy_node(decl);
3656 push_namespace (std_identifier);
3657 builtin_function_1 (decl2, std_node, true);
3661 return builtin_function_1 (decl, NULL_TREE, true);
3664 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3665 function. Not called directly. */
3668 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3670 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3671 DECL_EXTERNAL (fn) = 1;
3672 TREE_PUBLIC (fn) = 1;
3673 DECL_ARTIFICIAL (fn) = 1;
3674 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3675 SET_DECL_LANGUAGE (fn, lang_c);
3676 /* Runtime library routines are, by definition, available in an
3677 external shared object. */
3678 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3679 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3683 /* Returns the _DECL for a library function with C linkage.
3684 We assume that such functions never throw; if this is incorrect,
3685 callers should unset TREE_NOTHROW. */
3688 build_library_fn (tree name, tree type)
3690 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3691 TREE_NOTHROW (fn) = 1;
3695 /* Returns the _DECL for a library function with C++ linkage. */
3698 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3700 tree fn = build_library_fn_1 (name, operator_code, type);
3701 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3702 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3703 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3707 /* Like build_library_fn, but takes a C string instead of an
3711 build_library_fn_ptr (const char* name, tree type)
3713 return build_library_fn (get_identifier (name), type);
3716 /* Like build_cp_library_fn, but takes a C string instead of an
3720 build_cp_library_fn_ptr (const char* name, tree type)
3722 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3725 /* Like build_library_fn, but also pushes the function so that we will
3726 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3727 may throw exceptions listed in RAISES. */
3730 push_library_fn (tree name, tree type, tree raises)
3735 type = build_exception_variant (type, raises);
3737 fn = build_library_fn (name, type);
3738 pushdecl_top_level (fn);
3742 /* Like build_cp_library_fn, but also pushes the function so that it
3743 will be found by normal lookup. */
3746 push_cp_library_fn (enum tree_code operator_code, tree type)
3748 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3755 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3759 push_void_library_fn (tree name, tree parmtypes)
3761 tree type = build_function_type (void_type_node, parmtypes);
3762 return push_library_fn (name, type, NULL_TREE);
3765 /* Like push_library_fn, but also note that this function throws
3766 and does not return. Used for __throw_foo and the like. */
3769 push_throw_library_fn (tree name, tree type)
3771 tree fn = push_library_fn (name, type, NULL_TREE);
3772 TREE_THIS_VOLATILE (fn) = 1;
3773 TREE_NOTHROW (fn) = 0;
3777 /* When we call finish_struct for an anonymous union, we create
3778 default copy constructors and such. But, an anonymous union
3779 shouldn't have such things; this function undoes the damage to the
3780 anonymous union type T.
3782 (The reason that we create the synthesized methods is that we don't
3783 distinguish `union { int i; }' from `typedef union { int i; } U'.
3784 The first is an anonymous union; the second is just an ordinary
3788 fixup_anonymous_aggr (tree t)
3792 /* Wipe out memory of synthesized methods. */
3793 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3794 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3795 TYPE_HAS_INIT_REF (t) = 0;
3796 TYPE_HAS_CONST_INIT_REF (t) = 0;
3797 TYPE_HAS_ASSIGN_REF (t) = 0;
3798 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3800 /* Splice the implicitly generated functions out of the TYPE_METHODS
3802 q = &TYPE_METHODS (t);
3805 if (DECL_ARTIFICIAL (*q))
3806 *q = TREE_CHAIN (*q);
3808 q = &TREE_CHAIN (*q);
3811 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3812 if (TYPE_METHODS (t))
3814 tree decl = TYPE_MAIN_DECL (t);
3816 if (TREE_CODE (t) != UNION_TYPE)
3817 error_at (DECL_SOURCE_LOCATION (decl),
3818 "an anonymous struct cannot have function members");
3820 error_at (DECL_SOURCE_LOCATION (decl),
3821 "an anonymous union cannot have function members");
3824 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3825 assignment operators (because they cannot have these methods themselves).
3826 For anonymous unions this is already checked because they are not allowed
3827 in any union, otherwise we have to check it. */
3828 if (TREE_CODE (t) != UNION_TYPE)
3832 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3833 if (TREE_CODE (field) == FIELD_DECL)
3835 type = TREE_TYPE (field);
3836 if (CLASS_TYPE_P (type))
3838 if (TYPE_NEEDS_CONSTRUCTING (type))
3839 error ("member %q+#D with constructor not allowed "
3840 "in anonymous aggregate", field);
3841 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3842 error ("member %q+#D with destructor not allowed "
3843 "in anonymous aggregate", field);
3844 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3845 error ("member %q+#D with copy assignment operator "
3846 "not allowed in anonymous aggregate", field);
3852 /* Make sure that a declaration with no declarator is well-formed, i.e.
3853 just declares a tagged type or anonymous union.
3855 Returns the type declared; or NULL_TREE if none. */
3858 check_tag_decl (cp_decl_specifier_seq *declspecs)
3860 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3861 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3862 /* If a class, struct, or enum type is declared by the DECLSPECS
3863 (i.e, if a class-specifier, enum-specifier, or non-typename
3864 elaborated-type-specifier appears in the DECLSPECS),
3865 DECLARED_TYPE is set to the corresponding type. */
3866 tree declared_type = NULL_TREE;
3867 bool error_p = false;
3869 if (declspecs->multiple_types_p)
3870 error ("multiple types in one declaration");
3871 else if (declspecs->redefined_builtin_type)
3873 if (!in_system_header)
3874 permerror (input_location, "redeclaration of C++ built-in type %qT",
3875 declspecs->redefined_builtin_type);
3880 && TYPE_P (declspecs->type)
3881 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3882 && MAYBE_CLASS_TYPE_P (declspecs->type))
3883 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3884 declared_type = declspecs->type;
3885 else if (declspecs->type == error_mark_node)
3887 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3888 permerror (input_location, "declaration does not declare anything");
3889 /* Check for an anonymous union. */
3890 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3891 && TYPE_ANONYMOUS_P (declared_type))
3893 /* 7/3 In a simple-declaration, the optional init-declarator-list
3894 can be omitted only when declaring a class (clause 9) or
3895 enumeration (7.2), that is, when the decl-specifier-seq contains
3896 either a class-specifier, an elaborated-type-specifier with
3897 a class-key (9.1), or an enum-specifier. In these cases and
3898 whenever a class-specifier or enum-specifier is present in the
3899 decl-specifier-seq, the identifiers in these specifiers are among
3900 the names being declared by the declaration (as class-name,
3901 enum-names, or enumerators, depending on the syntax). In such
3902 cases, and except for the declaration of an unnamed bit-field (9.6),
3903 the decl-specifier-seq shall introduce one or more names into the
3904 program, or shall redeclare a name introduced by a previous
3905 declaration. [Example:
3906 enum { }; // ill-formed
3907 typedef class { }; // ill-formed
3911 error ("missing type-name in typedef-declaration");
3914 /* Anonymous unions are objects, so they can have specifiers. */;
3915 SET_ANON_AGGR_TYPE_P (declared_type);
3917 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3918 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3923 if (declspecs->specs[(int)ds_inline]
3924 || declspecs->specs[(int)ds_virtual])
3925 error ("%qs can only be specified for functions",
3926 declspecs->specs[(int)ds_inline]
3927 ? "inline" : "virtual");
3929 && (!current_class_type
3930 || current_scope () != current_class_type))
3931 error ("%<friend%> can only be specified inside a class");
3932 else if (declspecs->specs[(int)ds_explicit])
3933 error ("%<explicit%> can only be specified for constructors");
3934 else if (declspecs->storage_class)
3935 error ("a storage class can only be specified for objects "
3937 else if (declspecs->specs[(int)ds_const]
3938 || declspecs->specs[(int)ds_volatile]
3939 || declspecs->specs[(int)ds_restrict]
3940 || declspecs->specs[(int)ds_thread])
3941 error ("qualifiers can only be specified for objects "
3943 else if (saw_typedef)
3944 warning (0, "%<typedef%> was ignored in this declaration");
3947 return declared_type;
3950 /* Called when a declaration is seen that contains no names to declare.
3951 If its type is a reference to a structure, union or enum inherited
3952 from a containing scope, shadow that tag name for the current scope
3953 with a forward reference.
3954 If its type defines a new named structure or union
3955 or defines an enum, it is valid but we need not do anything here.
3956 Otherwise, it is an error.
3958 C++: may have to grok the declspecs to learn about static,
3959 complain for anonymous unions.
3961 Returns the TYPE declared -- or NULL_TREE if none. */
3964 shadow_tag (cp_decl_specifier_seq *declspecs)
3966 tree t = check_tag_decl (declspecs);
3971 if (declspecs->attributes)
3973 warning (0, "attribute ignored in declaration of %q+#T", t);
3974 warning (0, "attribute for %q+#T must follow the %qs keyword",
3975 t, class_key_or_enum_as_string (t));
3979 if (maybe_process_partial_specialization (t) == error_mark_node)
3982 /* This is where the variables in an anonymous union are
3983 declared. An anonymous union declaration looks like:
3985 because there is no declarator after the union, the parser
3986 sends that declaration here. */
3987 if (ANON_AGGR_TYPE_P (t))
3989 fixup_anonymous_aggr (t);
3991 if (TYPE_FIELDS (t))
3993 tree decl = grokdeclarator (/*declarator=*/NULL,
3994 declspecs, NORMAL, 0, NULL);
3995 finish_anon_union (decl);
4002 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4005 groktypename (cp_decl_specifier_seq *type_specifiers,
4006 const cp_declarator *declarator,
4007 bool is_template_arg)
4011 enum decl_context context
4012 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4013 attrs = type_specifiers->attributes;
4014 type_specifiers->attributes = NULL_TREE;
4015 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4016 if (attrs && type != error_mark_node)
4018 if (CLASS_TYPE_P (type))
4019 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4020 "outside of definition", type);
4021 else if (MAYBE_CLASS_TYPE_P (type))
4022 /* A template type parameter or other dependent type. */
4023 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4024 "type %qT without an associated declaration", type);
4026 cplus_decl_attributes (&type, attrs, 0);
4031 /* Process a DECLARATOR for a function-scope variable declaration,
4032 namespace-scope variable declaration, or function declaration.
4033 (Function definitions go through start_function; class member
4034 declarations appearing in the body of the class go through
4035 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4036 If an error occurs, the error_mark_node is returned instead.
4038 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4039 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4040 for an explicitly defaulted function, or SD_DELETED for an explicitly
4041 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4042 implicitly initialized via a default constructor. ATTRIBUTES and
4043 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4044 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4045 set, the caller is responsible for calling pop_scope. */
4048 start_decl (const cp_declarator *declarator,
4049 cp_decl_specifier_seq *declspecs,
4052 tree prefix_attributes,
4053 tree *pushed_scope_p)
4061 *pushed_scope_p = NULL_TREE;
4063 /* An object declared as __attribute__((deprecated)) suppresses
4064 warnings of uses of other deprecated items. */
4065 if (lookup_attribute ("deprecated", attributes))
4066 deprecated_state = DEPRECATED_SUPPRESS;
4068 attributes = chainon (attributes, prefix_attributes);
4070 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4073 deprecated_state = DEPRECATED_NORMAL;
4075 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4076 || decl == error_mark_node)
4077 return error_mark_node;
4079 type = TREE_TYPE (decl);
4081 context = DECL_CONTEXT (decl);
4085 *pushed_scope_p = push_scope (context);
4087 /* We are only interested in class contexts, later. */
4088 if (TREE_CODE (context) == NAMESPACE_DECL)
4089 context = NULL_TREE;
4093 /* Is it valid for this decl to have an initializer at all?
4094 If not, set INITIALIZED to zero, which will indirectly
4095 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4096 switch (TREE_CODE (decl))
4099 error ("typedef %qD is initialized (use decltype instead)", decl);
4100 return error_mark_node;
4103 if (initialized == SD_DELETED)
4104 /* We'll handle the rest of the semantics later, but we need to
4105 set this now so it's visible to duplicate_decls. */
4106 DECL_DELETED_FN (decl) = 1;
4115 if (! toplevel_bindings_p ()
4116 && DECL_EXTERNAL (decl))
4117 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4119 DECL_EXTERNAL (decl) = 0;
4120 if (toplevel_bindings_p ())
4121 TREE_STATIC (decl) = 1;
4124 /* If this is a typedef that names the class for linkage purposes
4125 (7.1.3p8), apply any attributes directly to the type. */
4126 if (TREE_CODE (decl) == TYPE_DECL
4127 && TAGGED_TYPE_P (TREE_TYPE (decl))
4128 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4129 flags = ATTR_FLAG_TYPE_IN_PLACE;
4133 /* Set attributes here so if duplicate decl, will have proper attributes. */
4134 cplus_decl_attributes (&decl, attributes, flags);
4136 /* Dllimported symbols cannot be defined. Static data members (which
4137 can be initialized in-class and dllimported) go through grokfield,
4138 not here, so we don't need to exclude those decls when checking for
4140 if (initialized && DECL_DLLIMPORT_P (decl))
4142 error ("definition of %q#D is marked %<dllimport%>", decl);
4143 DECL_DLLIMPORT_P (decl) = 0;
4146 /* If #pragma weak was used, mark the decl weak now. */
4147 maybe_apply_pragma_weak (decl);
4149 if (TREE_CODE (decl) == FUNCTION_DECL
4150 && DECL_DECLARED_INLINE_P (decl)
4151 && DECL_UNINLINABLE (decl)
4152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4153 warning (0, "inline function %q+D given attribute noinline", decl);
4155 if (context && COMPLETE_TYPE_P (complete_type (context)))
4157 if (TREE_CODE (decl) == VAR_DECL)
4159 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4160 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4161 error ("%q#D is not a static member of %q#T", decl, context);
4164 if (DECL_CONTEXT (field) != context)
4166 if (!same_type_p (DECL_CONTEXT (field), context))
4167 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4168 "to be defined as %<%T::%D%>",
4169 DECL_CONTEXT (field), DECL_NAME (decl),
4170 context, DECL_NAME (decl));
4171 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4173 if (processing_specialization
4174 && template_class_depth (context) == 0
4175 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4176 error ("template header not allowed in member definition "
4177 "of explicitly specialized class");
4178 /* Static data member are tricky; an in-class initialization
4179 still doesn't provide a definition, so the in-class
4180 declaration will have DECL_EXTERNAL set, but will have an
4181 initialization. Thus, duplicate_decls won't warn
4182 about this situation, and so we check here. */
4183 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4184 error ("duplicate initialization of %qD", decl);
4185 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4191 tree field = check_classfn (context, decl,
4192 (processing_template_decl
4193 > template_class_depth (context))
4194 ? current_template_parms
4196 if (field && field != error_mark_node
4197 && duplicate_decls (decl, field,
4198 /*newdecl_is_friend=*/false))
4202 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4203 DECL_IN_AGGR_P (decl) = 0;
4204 /* Do not mark DECL as an explicit specialization if it was not
4205 already marked as an instantiation; a declaration should
4206 never be marked as a specialization unless we know what
4207 template is being specialized. */
4208 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4210 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4212 /* [temp.expl.spec] An explicit specialization of a static data
4213 member of a template is a definition if the declaration
4214 includes an initializer; otherwise, it is a declaration.
4216 We check for processing_specialization so this only applies
4217 to the new specialization syntax. */
4218 if (!initialized && processing_specialization)
4219 DECL_EXTERNAL (decl) = 1;
4222 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4223 permerror (input_location, "declaration of %q#D outside of class is not definition",
4227 was_public = TREE_PUBLIC (decl);
4229 /* Enter this declaration into the symbol table. */
4230 decl = maybe_push_decl (decl);
4232 if (processing_template_decl)
4233 decl = push_template_decl (decl);
4234 if (decl == error_mark_node)
4235 return error_mark_node;
4237 /* Tell the back end to use or not use .common as appropriate. If we say
4238 -fconserve-space, we want this to save .data space, at the expense of
4239 wrong semantics. If we say -fno-conserve-space, we want this to
4240 produce errors about redefs; to do this we force variables into the
4242 if (flag_conserve_space
4243 && TREE_CODE (decl) == VAR_DECL
4244 && TREE_PUBLIC (decl)
4245 && !DECL_THREAD_LOCAL_P (decl)
4246 && !have_global_bss_p ())
4247 DECL_COMMON (decl) = 1;
4249 if (TREE_CODE (decl) == VAR_DECL
4250 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4251 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4253 /* This is a const variable with implicit 'static'. Set
4254 DECL_THIS_STATIC so we can tell it from variables that are
4255 !TREE_PUBLIC because of the anonymous namespace. */
4256 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4257 DECL_THIS_STATIC (decl) = 1;
4260 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4261 start_decl_1 (decl, initialized);
4266 /* Process the declaration of a variable DECL. INITIALIZED is true
4267 iff DECL is explicitly initialized. (INITIALIZED is false if the
4268 variable is initialized via an implicitly-called constructor.)
4269 This function must be called for ordinary variables (including, for
4270 example, implicit instantiations of templates), but must not be
4271 called for template declarations. */
4274 start_decl_1 (tree decl, bool initialized)
4278 bool aggregate_definition_p;
4280 gcc_assert (!processing_template_decl);
4282 if (error_operand_p (decl))
4285 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4287 type = TREE_TYPE (decl);
4288 complete_p = COMPLETE_TYPE_P (type);
4289 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4291 /* If an explicit initializer is present, or if this is a definition
4292 of an aggregate, then we need a complete type at this point.
4293 (Scalars are always complete types, so there is nothing to
4294 check.) This code just sets COMPLETE_P; errors (if necessary)
4295 are issued below. */
4296 if ((initialized || aggregate_definition_p)
4298 && COMPLETE_TYPE_P (complete_type (type)))
4301 /* We will not yet have set TREE_READONLY on DECL if the type
4302 was "const", but incomplete, before this point. But, now, we
4303 have a complete type, so we can try again. */
4304 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4308 /* Is it valid for this decl to have an initializer at all? */
4310 /* Don't allow initializations for incomplete types except for
4311 arrays which might be completed by the initialization. */
4313 ; /* A complete type is ok. */
4314 else if (type_uses_auto (type))
4315 ; /* An auto type is ok. */
4316 else if (TREE_CODE (type) != ARRAY_TYPE)
4318 error ("variable %q#D has initializer but incomplete type", decl);
4319 type = TREE_TYPE (decl) = error_mark_node;
4321 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4323 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4324 error ("elements of array %q#D have incomplete type", decl);
4325 /* else we already gave an error in start_decl. */
4328 else if (aggregate_definition_p && !complete_p)
4330 if (type_uses_auto (type))
4331 error ("declaration of %q#D has no initializer", decl);
4333 error ("aggregate %q#D has incomplete type and cannot be defined",
4335 /* Change the type so that assemble_variable will give
4336 DECL an rtl we can live with: (mem (const_int 0)). */
4337 type = TREE_TYPE (decl) = error_mark_node;
4340 /* Create a new scope to hold this declaration if necessary.
4341 Whether or not a new scope is necessary cannot be determined
4342 until after the type has been completed; if the type is a
4343 specialization of a class template it is not until after
4344 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4345 will be set correctly. */
4346 maybe_push_cleanup_level (type);
4349 /* Handle initialization of references. DECL, TYPE, and INIT have the
4350 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4351 but will be set to a new CLEANUP_STMT if a temporary is created
4352 that must be destroyed subsequently.
4354 Returns an initializer expression to use to initialize DECL, or
4355 NULL if the initialization can be performed statically.
4357 Quotes on semantics can be found in ARM 8.4.3. */
4360 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4364 if (init == NULL_TREE)
4366 if ((DECL_LANG_SPECIFIC (decl) == 0
4367 || DECL_IN_AGGR_P (decl) == 0)
4368 && ! DECL_THIS_EXTERN (decl))
4369 error ("%qD declared as reference but not initialized", decl);
4373 if (TREE_CODE (init) == TREE_LIST)
4374 init = build_x_compound_expr_from_list (init, "initializer");
4376 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4377 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4378 /* Note: default conversion is only called in very special cases. */
4379 init = decay_conversion (init);
4381 /* Convert INIT to the reference type TYPE. This may involve the
4382 creation of a temporary, whose lifetime must be the same as that
4383 of the reference. If so, a DECL_EXPR for the temporary will be
4384 added just after the DECL_EXPR for DECL. That's why we don't set
4385 DECL_INITIAL for local references (instead assigning to them
4386 explicitly); we need to allow the temporary to be initialized
4388 tmp = initialize_reference (type, init, decl, cleanup);
4390 if (tmp == error_mark_node)
4392 else if (tmp == NULL_TREE)
4394 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4398 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4401 DECL_INITIAL (decl) = tmp;
4406 /* Subroutine of check_initializer. We're initializing a DECL of
4407 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4408 extend the lifetime of the underlying array to match that of the decl,
4409 just like for reference initialization. CLEANUP is as for
4410 grok_reference_init. */
4413 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4415 tree aggr_init, array, arrtype;
4416 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4417 aggr_init = TARGET_EXPR_INITIAL (init);
4418 init = build2 (INIT_EXPR, type, decl, init);
4420 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4421 arrtype = TREE_TYPE (array);
4423 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4424 array = TREE_OPERAND (array, 0);
4425 /* If the array is constant, finish_compound_literal already made it a
4426 static variable and we don't need to do anything here. */
4427 if (decl && TREE_CODE (array) == TARGET_EXPR)
4430 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4431 var = build_address (var);
4432 var = convert (arrtype, var);
4433 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4434 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4439 /* Designated initializers in arrays are not supported in GNU C++.
4440 The parser cannot detect this error since it does not know whether
4441 a given brace-enclosed initializer is for a class type or for an
4442 array. This function checks that CE does not use a designated
4443 initializer. If it does, an error is issued. Returns true if CE
4444 is valid, i.e., does not have a designated initializer. */
4447 check_array_designated_initializer (const constructor_elt *ce)
4449 /* Designated initializers for array elements are not supported. */
4452 /* The parser only allows identifiers as designated
4454 if (ce->index == error_mark_node)
4455 error ("name used in a GNU-style designated "
4456 "initializer for an array");
4459 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4460 error ("name %qD used in a GNU-style designated "
4461 "initializer for an array", ce->index);
4469 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4470 array until we finish parsing the initializer. If that's the
4471 situation we're in, update DECL accordingly. */
4474 maybe_deduce_size_from_array_init (tree decl, tree init)
4476 tree type = TREE_TYPE (decl);
4478 if (TREE_CODE (type) == ARRAY_TYPE
4479 && TYPE_DOMAIN (type) == NULL_TREE
4480 && TREE_CODE (decl) != TYPE_DECL)
4482 /* do_default is really a C-ism to deal with tentative definitions.
4483 But let's leave it here to ease the eventual merge. */
4484 int do_default = !DECL_EXTERNAL (decl);
4485 tree initializer = init ? init : DECL_INITIAL (decl);
4488 /* Check that there are no designated initializers in INIT, as
4489 those are not supported in GNU C++, and as the middle-end
4490 will crash if presented with a non-numeric designated
4492 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4494 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4495 constructor_elt *ce;
4498 VEC_iterate (constructor_elt, v, i, ce);
4500 if (!check_array_designated_initializer (ce))
4506 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4510 error ("initializer fails to determine size of %qD", decl);
4511 TREE_TYPE (decl) = error_mark_node;
4513 else if (failure == 2)
4517 error ("array size missing in %qD", decl);
4518 TREE_TYPE (decl) = error_mark_node;
4520 /* If a `static' var's size isn't known, make it extern as
4521 well as static, so it does not get allocated. If it's not
4522 `static', then don't mark it extern; finish_incomplete_decl
4523 will give it a default size and it will get allocated. */
4524 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4525 DECL_EXTERNAL (decl) = 1;
4527 else if (failure == 3)
4529 error ("zero-size array %qD", decl);
4530 TREE_TYPE (decl) = error_mark_node;
4534 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4536 relayout_decl (decl);
4540 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4541 any appropriate error messages regarding the layout. */
4544 layout_var_decl (tree decl)
4548 type = TREE_TYPE (decl);
4549 if (type == error_mark_node)
4552 /* If we haven't already layed out this declaration, do so now.
4553 Note that we must not call complete type for an external object
4554 because it's type might involve templates that we are not
4555 supposed to instantiate yet. (And it's perfectly valid to say
4556 `extern X x' for some incomplete type `X'.) */
4557 if (!DECL_EXTERNAL (decl))
4558 complete_type (type);
4559 if (!DECL_SIZE (decl)
4560 && TREE_TYPE (decl) != error_mark_node
4561 && (COMPLETE_TYPE_P (type)
4562 || (TREE_CODE (type) == ARRAY_TYPE
4563 && !TYPE_DOMAIN (type)
4564 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4565 layout_decl (decl, 0);
4567 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4569 /* An automatic variable with an incomplete type: that is an error.
4570 Don't talk about array types here, since we took care of that
4571 message in grokdeclarator. */
4572 error ("storage size of %qD isn't known", decl);
4573 TREE_TYPE (decl) = error_mark_node;
4576 /* Keep this code around in case we later want to control debug info
4577 based on whether a type is "used". (jason 1999-11-11) */
4579 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4580 /* Let debugger know it should output info for this type. */
4581 note_debug_info_needed (ttype);
4583 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4584 note_debug_info_needed (DECL_CONTEXT (decl));
4587 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4588 && DECL_SIZE (decl) != NULL_TREE
4589 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4591 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4592 constant_expression_warning (DECL_SIZE (decl));
4595 error ("storage size of %qD isn't constant", decl);
4596 TREE_TYPE (decl) = error_mark_node;
4601 /* If a local static variable is declared in an inline function, or if
4602 we have a weak definition, we must endeavor to create only one
4603 instance of the variable at link-time. */
4606 maybe_commonize_var (tree decl)
4608 /* Static data in a function with comdat linkage also has comdat
4610 if (TREE_STATIC (decl)
4611 /* Don't mess with __FUNCTION__. */
4612 && ! DECL_ARTIFICIAL (decl)
4613 && DECL_FUNCTION_SCOPE_P (decl)
4614 /* Unfortunately, import_export_decl has not always been called
4615 before the function is processed, so we cannot simply check
4617 && (DECL_COMDAT (DECL_CONTEXT (decl))
4618 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4619 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4620 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4624 /* With weak symbols, we simply make the variable COMDAT;
4625 that will cause copies in multiple translations units to
4627 comdat_linkage (decl);
4631 if (DECL_INITIAL (decl) == NULL_TREE
4632 || DECL_INITIAL (decl) == error_mark_node)
4634 /* Without weak symbols, we can use COMMON to merge
4635 uninitialized variables. */
4636 TREE_PUBLIC (decl) = 1;
4637 DECL_COMMON (decl) = 1;
4641 /* While for initialized variables, we must use internal
4642 linkage -- which means that multiple copies will not
4644 TREE_PUBLIC (decl) = 0;
4645 DECL_COMMON (decl) = 0;
4646 warning_at (input_location, 0,
4647 "sorry: semantics of inline function static "
4648 "data %q+#D are wrong (you'll wind up "
4649 "with multiple copies)", decl);
4650 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4651 " you can work around this by removing "
4656 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4657 /* Set it up again; we might have set DECL_INITIAL since the last
4659 comdat_linkage (decl);
4662 /* Issue an error message if DECL is an uninitialized const variable. */
4665 check_for_uninitialized_const_var (tree decl)
4667 tree type = TREE_TYPE (decl);
4669 /* ``Unless explicitly declared extern, a const object does not have
4670 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4672 if (TREE_CODE (decl) == VAR_DECL
4673 && TREE_CODE (type) != REFERENCE_TYPE
4674 && CP_TYPE_CONST_P (type)
4675 && !TYPE_NEEDS_CONSTRUCTING (type)
4676 && !DECL_INITIAL (decl))
4677 error ("uninitialized const %qD", decl);
4681 /* Structure holding the current initializer being processed by reshape_init.
4682 CUR is a pointer to the current element being processed, END is a pointer
4683 after the last element present in the initializer. */
4684 typedef struct reshape_iterator_t
4686 constructor_elt *cur;
4687 constructor_elt *end;
4690 static tree reshape_init_r (tree, reshape_iter *, bool);
4692 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4693 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4694 initialized. If there are no more such fields, the return value
4698 next_initializable_field (tree field)
4701 && (TREE_CODE (field) != FIELD_DECL
4702 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4703 || DECL_ARTIFICIAL (field)))
4704 field = TREE_CHAIN (field);
4709 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4710 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4711 INTEGER_CST representing the size of the array minus one (the maximum index),
4712 or NULL_TREE if the array was declared without specifying the size. D is
4713 the iterator within the constructor. */
4716 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4719 bool sized_array_p = (max_index != NULL_TREE);
4720 unsigned HOST_WIDE_INT max_index_cst = 0;
4721 unsigned HOST_WIDE_INT index;
4723 /* The initializer for an array is always a CONSTRUCTOR. */
4724 new_init = build_constructor (init_list_type_node, NULL);
4728 /* Minus 1 is used for zero sized arrays. */
4729 if (integer_all_onesp (max_index))
4732 if (host_integerp (max_index, 1))
4733 max_index_cst = tree_low_cst (max_index, 1);
4734 /* sizetype is sign extended, not zero extended. */
4736 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4740 /* Loop until there are no more initializers. */
4742 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4747 check_array_designated_initializer (d->cur);
4748 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4749 if (elt_init == error_mark_node)
4750 return error_mark_node;
4751 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4757 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4758 Parameters are the same of reshape_init_r. */
4761 reshape_init_array (tree type, reshape_iter *d)
4763 tree max_index = NULL_TREE;
4765 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4767 if (TYPE_DOMAIN (type))
4768 max_index = array_type_nelts (type);
4770 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4773 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4774 Parameters are the same of reshape_init_r. */
4777 reshape_init_vector (tree type, reshape_iter *d)
4779 tree max_index = NULL_TREE;
4782 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4784 if (COMPOUND_LITERAL_P (d->cur->value))
4786 tree value = d->cur->value;
4787 if (!same_type_p (TREE_TYPE (value), type))
4789 error ("invalid type %qT as initializer for a vector of type %qT",
4790 TREE_TYPE (d->cur->value), type);
4791 value = error_mark_node;
4797 /* For a vector, the representation type is a struct
4798 containing a single member which is an array of the
4799 appropriate size. */
4800 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4801 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4802 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4804 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4807 /* Subroutine of reshape_init_r, processes the initializers for classes
4808 or union. Parameters are the same of reshape_init_r. */
4811 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4816 gcc_assert (CLASS_TYPE_P (type));
4818 /* The initializer for a class is always a CONSTRUCTOR. */
4819 new_init = build_constructor (init_list_type_node, NULL);
4820 field = next_initializable_field (TYPE_FIELDS (type));
4826 An initializer for an aggregate member that is an
4827 empty class shall have the form of an empty
4828 initializer-list {}. */
4829 if (!first_initializer_p)
4831 error ("initializer for %qT must be brace-enclosed", type);
4832 return error_mark_node;
4837 /* Loop through the initializable fields, gathering initializers. */
4838 while (d->cur != d->end)
4842 /* Handle designated initializers, as an extension. */
4845 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4847 if (!field || TREE_CODE (field) != FIELD_DECL)
4849 error ("%qT has no non-static data member named %qD", type,
4851 return error_mark_node;
4855 /* If we processed all the member of the class, we are done. */
4859 field_init = reshape_init_r (TREE_TYPE (field), d,
4860 /*first_initializer_p=*/false);
4861 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4865 When a union is initialized with a brace-enclosed
4866 initializer, the braces shall only contain an
4867 initializer for the first member of the union. */
4868 if (TREE_CODE (type) == UNION_TYPE)
4871 field = next_initializable_field (TREE_CHAIN (field));
4877 /* Subroutine of reshape_init, which processes a single initializer (part of
4878 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4879 iterator within the CONSTRUCTOR which points to the initializer to process.
4880 FIRST_INITIALIZER_P is true if this is the first initializer of the
4881 CONSTRUCTOR node. */
4884 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4886 tree init = d->cur->value;
4888 if (error_operand_p (init))
4889 return error_mark_node;
4891 /* A non-aggregate type is always initialized with a single
4893 if (!CP_AGGREGATE_TYPE_P (type))
4895 /* It is invalid to initialize a non-aggregate type with a
4896 brace-enclosed initializer before C++0x.
4897 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4898 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4899 a CONSTRUCTOR (with a record type). */
4900 if (TREE_CODE (init) == CONSTRUCTOR
4901 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4903 if (SCALAR_TYPE_P (type))
4905 error ("braces around scalar initializer for type %qT", type);
4906 init = error_mark_node;
4909 maybe_warn_cpp0x ("extended initializer lists");
4918 All implicit type conversions (clause _conv_) are considered when
4919 initializing the aggregate member with an initializer from an
4920 initializer-list. If the initializer can initialize a member,
4921 the member is initialized. Otherwise, if the member is itself a
4922 non-empty subaggregate, brace elision is assumed and the
4923 initializer is considered for the initialization of the first
4924 member of the subaggregate. */
4925 if (TREE_CODE (init) != CONSTRUCTOR
4926 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4932 /* [dcl.init.string]
4934 A char array (whether plain char, signed char, or unsigned char)
4935 can be initialized by a string-literal (optionally enclosed in
4936 braces); a wchar_t array can be initialized by a wide
4937 string-literal (optionally enclosed in braces). */
4938 if (TREE_CODE (type) == ARRAY_TYPE
4939 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4941 tree str_init = init;
4943 /* Strip one level of braces if and only if they enclose a single
4944 element (as allowed by [dcl.init.string]). */
4945 if (!first_initializer_p
4946 && TREE_CODE (str_init) == CONSTRUCTOR
4947 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4949 str_init = VEC_index (constructor_elt,
4950 CONSTRUCTOR_ELTS (str_init), 0)->value;
4953 /* If it's a string literal, then it's the initializer for the array
4954 as a whole. Otherwise, continue with normal initialization for
4955 array types (one value per array element). */
4956 if (TREE_CODE (str_init) == STRING_CST)
4963 /* The following cases are about aggregates. If we are not within a full
4964 initializer already, and there is not a CONSTRUCTOR, it means that there
4965 is a missing set of braces (that is, we are processing the case for
4966 which reshape_init exists). */
4967 if (!first_initializer_p)
4969 if (TREE_CODE (init) == CONSTRUCTOR)
4971 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4972 /* There is no need to reshape pointer-to-member function
4973 initializers, as they are always constructed correctly
4974 by the front end. */
4976 else if (COMPOUND_LITERAL_P (init))
4977 /* For a nested compound literal, there is no need to reshape since
4978 brace elision is not allowed. Even if we decided to allow it,
4979 we should add a call to reshape_init in finish_compound_literal,
4980 before calling digest_init, so changing this code would still
4981 not be necessary. */
4982 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4986 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4987 return reshape_init (type, init);
4991 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4995 /* Dispatch to specialized routines. */
4996 if (CLASS_TYPE_P (type))
4997 return reshape_init_class (type, d, first_initializer_p);
4998 else if (TREE_CODE (type) == ARRAY_TYPE)
4999 return reshape_init_array (type, d);
5000 else if (TREE_CODE (type) == VECTOR_TYPE)
5001 return reshape_init_vector (type, d);
5006 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5007 brace-enclosed aggregate initializer.
5009 INIT is the CONSTRUCTOR containing the list of initializers describing
5010 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5011 It may not presently match the shape of the TYPE; for example:
5013 struct S { int a; int b; };
5014 struct S a[] = { 1, 2, 3, 4 };
5016 Here INIT will hold a VEC of four elements, rather than a
5017 VEC of two elements, each itself a VEC of two elements. This
5018 routine transforms INIT from the former form into the latter. The
5019 revised CONSTRUCTOR node is returned. */
5022 reshape_init (tree type, tree init)
5024 VEC(constructor_elt, gc) *v;
5028 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5030 v = CONSTRUCTOR_ELTS (init);
5032 /* An empty constructor does not need reshaping, and it is always a valid
5034 if (VEC_empty (constructor_elt, v))
5037 /* Recurse on this CONSTRUCTOR. */
5038 d.cur = VEC_index (constructor_elt, v, 0);
5039 d.end = d.cur + VEC_length (constructor_elt, v);
5041 new_init = reshape_init_r (type, &d, true);
5042 if (new_init == error_mark_node)
5043 return error_mark_node;
5045 /* Make sure all the element of the constructor were used. Otherwise,
5046 issue an error about exceeding initializers. */
5048 error ("too many initializers for %qT", type);
5053 /* Verify array initializer. Returns true if errors have been reported. */
5056 check_array_initializer (tree decl, tree type, tree init)
5058 tree element_type = TREE_TYPE (type);
5060 /* The array type itself need not be complete, because the
5061 initializer may tell us how many elements are in the array.
5062 But, the elements of the array must be complete. */
5063 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5066 error ("elements of array %q#D have incomplete type", decl);
5068 error ("elements of array %q#T have incomplete type", type);
5071 /* It is not valid to initialize a VLA. */
5073 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5074 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5077 error ("variable-sized object %qD may not be initialized", decl);
5079 error ("variable-sized compound literal");
5085 /* Subroutine of check_initializer; args are passed down from that function.
5086 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5089 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5092 int saved_stmts_are_full_exprs_p = 0;
5093 if (building_stmt_tree ())
5095 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5096 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5098 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5099 if (building_stmt_tree ())
5100 current_stmt_tree ()->stmts_are_full_exprs_p =
5101 saved_stmts_are_full_exprs_p;
5105 /* Verify INIT (the initializer for DECL), and record the
5106 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5107 grok_reference_init.
5109 If the return value is non-NULL, it is an expression that must be
5110 evaluated dynamically to initialize DECL. */
5113 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5115 tree type = TREE_TYPE (decl);
5116 tree init_code = NULL;
5118 /* Things that are going to be initialized need to have complete
5120 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5122 if (type == error_mark_node)
5123 /* We will have already complained. */
5126 if (TREE_CODE (type) == ARRAY_TYPE)
5128 if (check_array_initializer (decl, type, init))
5131 else if (!COMPLETE_TYPE_P (type))
5133 error ("%qD has incomplete type", decl);
5134 TREE_TYPE (decl) = error_mark_node;
5138 /* There is no way to make a variable-sized class type in GNU C++. */
5139 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5141 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5143 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5144 if (SCALAR_TYPE_P (type))
5148 maybe_warn_cpp0x ("extended initializer lists");
5149 init = build_zero_init (type, NULL_TREE, false);
5151 else if (init_len != 1)
5153 error ("scalar object %qD requires one element in initializer",
5155 TREE_TYPE (decl) = error_mark_node;
5161 if (TREE_CODE (decl) == CONST_DECL)
5163 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5165 DECL_INITIAL (decl) = init;
5167 gcc_assert (init != NULL_TREE);
5170 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5171 init = grok_reference_init (decl, type, init, cleanup);
5174 /* Do not reshape constructors of vectors (they don't need to be
5176 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5178 if (is_std_init_list (type))
5179 return build_init_list_var_init (decl, type, init, cleanup);
5180 else if (TYPE_NON_AGGREGATE_CLASS (type))
5182 /* Don't reshape if the class has constructors. */
5183 if (cxx_dialect == cxx98)
5184 error ("in C++98 %qD must be initialized by constructor, "
5187 init = build_tree_list (NULL_TREE, init);
5189 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5191 error ("opaque vector types cannot be initialized");
5192 init = error_mark_node;
5195 init = reshape_init (type, init);
5198 /* If DECL has an array type without a specific bound, deduce the
5199 array size from the initializer. */
5200 maybe_deduce_size_from_array_init (decl, init);
5201 type = TREE_TYPE (decl);
5202 if (type == error_mark_node)
5205 if (TYPE_NEEDS_CONSTRUCTING (type)
5206 || (CLASS_TYPE_P (type)
5207 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5208 return build_aggr_init_full_exprs (decl, init, flags);
5209 else if (TREE_CODE (init) != TREE_VEC)
5211 init_code = store_init_value (decl, init, flags);
5212 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5213 && DECL_INITIAL (decl)
5214 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5215 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5216 warning (0, "array %qD initialized by parenthesized string literal %qE",
5217 decl, DECL_INITIAL (decl));
5221 else if (DECL_EXTERNAL (decl))
5223 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5224 return build_aggr_init_full_exprs (decl, init, flags);
5225 else if (MAYBE_CLASS_TYPE_P (type))
5227 tree core_type = strip_array_types (type);
5229 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5230 error ("structure %qD with uninitialized const members", decl);
5231 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5232 error ("structure %qD with uninitialized reference members", decl);
5234 check_for_uninitialized_const_var (decl);
5237 check_for_uninitialized_const_var (decl);
5239 if (init && init != error_mark_node)
5240 init_code = build2 (INIT_EXPR, type, decl, init);
5245 /* If DECL is not a local variable, give it RTL. */
5248 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5250 int toplev = toplevel_bindings_p ();
5252 const char *filename;
5254 /* Set the DECL_ASSEMBLER_NAME for the object. */
5257 /* The `register' keyword, when used together with an
5258 asm-specification, indicates that the variable should be
5259 placed in a particular register. */
5260 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5262 set_user_assembler_name (decl, asmspec);
5263 DECL_HARD_REGISTER (decl) = 1;
5267 if (TREE_CODE (decl) == FUNCTION_DECL
5268 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5269 set_builtin_user_assembler_name (decl, asmspec);
5270 set_user_assembler_name (decl, asmspec);
5274 /* Handle non-variables up front. */
5275 if (TREE_CODE (decl) != VAR_DECL)
5277 rest_of_decl_compilation (decl, toplev, at_eof);
5281 /* If we see a class member here, it should be a static data
5283 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5285 gcc_assert (TREE_STATIC (decl));
5286 /* An in-class declaration of a static data member should be
5287 external; it is only a declaration, and not a definition. */
5288 if (init == NULL_TREE)
5289 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5292 /* We don't create any RTL for local variables. */
5293 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5296 /* We defer emission of local statics until the corresponding
5297 DECL_EXPR is expanded. */
5298 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5300 /* We try to defer namespace-scope static constants so that they are
5301 not emitted into the object file unnecessarily. */
5302 filename = input_filename;
5303 if (!DECL_VIRTUAL_P (decl)
5304 && TREE_READONLY (decl)
5305 && DECL_INITIAL (decl) != NULL_TREE
5306 && DECL_INITIAL (decl) != error_mark_node
5308 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5310 && !TREE_PUBLIC (decl))
5312 /* Fool with the linkage of static consts according to #pragma
5314 struct c_fileinfo *finfo = get_fileinfo (filename);
5315 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5317 TREE_PUBLIC (decl) = 1;
5318 DECL_EXTERNAL (decl) = finfo->interface_only;
5323 /* Likewise for template instantiations. */
5324 else if (DECL_LANG_SPECIFIC (decl)
5325 && DECL_IMPLICIT_INSTANTIATION (decl))
5328 /* If we're not deferring, go ahead and assemble the variable. */
5330 rest_of_decl_compilation (decl, toplev, at_eof);
5333 /* walk_tree helper for wrap_temporary_cleanups, below. */
5336 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5338 if (TYPE_P (*stmt_p))
5344 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5346 tree guard = (tree)data;
5347 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5349 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5350 /* Tell honor_protect_cleanup_actions to handle this as a separate
5352 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5354 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5360 /* We're initializing a local variable which has a cleanup GUARD. If there
5361 are any temporaries used in the initializer INIT of this variable, we
5362 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5363 variable will be cleaned up properly if one of them throws.
5365 Unfortunately, there's no way to express this properly in terms of
5366 nesting, as the regions for the temporaries overlap the region for the
5367 variable itself; if there are two temporaries, the variable needs to be
5368 the first thing destroyed if either of them throws. However, we only
5369 want to run the variable's cleanup if it actually got constructed. So
5370 we need to guard the temporary cleanups with the variable's cleanup if
5371 they are run on the normal path, but not if they are run on the
5372 exceptional path. We implement this by telling
5373 honor_protect_cleanup_actions to strip the variable cleanup from the
5374 exceptional path. */
5377 wrap_temporary_cleanups (tree init, tree guard)
5379 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5382 /* Generate code to initialize DECL (a local variable). */
5385 initialize_local_var (tree decl, tree init)
5387 tree type = TREE_TYPE (decl);
5391 gcc_assert (TREE_CODE (decl) == VAR_DECL
5392 || TREE_CODE (decl) == RESULT_DECL);
5393 gcc_assert (!TREE_STATIC (decl));
5395 if (DECL_SIZE (decl) == NULL_TREE)
5397 /* If we used it already as memory, it must stay in memory. */
5398 DECL_INITIAL (decl) = NULL_TREE;
5399 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5403 if (type == error_mark_node)
5406 /* Compute and store the initial value. */
5407 already_used = TREE_USED (decl) || TREE_USED (type);
5409 /* Generate a cleanup, if necessary. */
5410 cleanup = cxx_maybe_build_cleanup (decl);
5412 /* Perform the initialization. */
5415 int saved_stmts_are_full_exprs_p;
5417 /* If we're only initializing a single object, guard the destructors
5418 of any temporaries used in its initializer with its destructor.
5419 This isn't right for arrays because each element initialization is
5420 a full-expression. */
5421 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5422 wrap_temporary_cleanups (init, cleanup);
5424 gcc_assert (building_stmt_tree ());
5425 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5426 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5427 finish_expr_stmt (init);
5428 current_stmt_tree ()->stmts_are_full_exprs_p =
5429 saved_stmts_are_full_exprs_p;
5432 /* Set this to 0 so we can tell whether an aggregate which was
5433 initialized was ever used. Don't do this if it has a
5434 destructor, so we don't complain about the 'resource
5435 allocation is initialization' idiom. Now set
5436 attribute((unused)) on types so decls of that type will be
5437 marked used. (see TREE_USED, above.) */
5438 if (TYPE_NEEDS_CONSTRUCTING (type)
5440 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5441 && DECL_NAME (decl))
5442 TREE_USED (decl) = 0;
5443 else if (already_used)
5444 TREE_USED (decl) = 1;
5447 finish_decl_cleanup (decl, cleanup);
5450 /* DECL is a VAR_DECL for a compiler-generated variable with static
5451 storage duration (like a virtual table) whose initializer is a
5452 compile-time constant. INIT must be either a TREE_LIST of values,
5453 or a CONSTRUCTOR. Initialize the variable and provide it to the
5457 initialize_artificial_var (tree decl, tree init)
5459 gcc_assert (DECL_ARTIFICIAL (decl));
5460 if (TREE_CODE (init) == TREE_LIST)
5461 init = build_constructor_from_list (TREE_TYPE (decl), init);
5462 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5463 DECL_INITIAL (decl) = init;
5464 DECL_INITIALIZED_P (decl) = 1;
5465 determine_visibility (decl);
5466 layout_var_decl (decl);
5467 maybe_commonize_var (decl);
5468 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5471 /* INIT is the initializer for a variable, as represented by the
5472 parser. Returns true iff INIT is value-dependent. */
5475 value_dependent_init_p (tree init)
5477 if (TREE_CODE (init) == TREE_LIST)
5478 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5479 return any_value_dependent_elements_p (init);
5480 else if (TREE_CODE (init) == CONSTRUCTOR)
5481 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5483 VEC(constructor_elt, gc) *elts;
5487 elts = CONSTRUCTOR_ELTS (init);
5488 nelts = VEC_length (constructor_elt, elts);
5489 for (i = 0; i < nelts; ++i)
5490 if (value_dependent_init_p (VEC_index (constructor_elt,
5495 /* It must be a simple expression, e.g., int i = 3; */
5496 return value_dependent_expression_p (init);
5501 /* Finish processing of a declaration;
5502 install its line number and initial value.
5503 If the length of an array type is not known before,
5504 it must be determined now, from the initial value, or it is an error.
5506 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5507 true, then INIT is an integral constant expression.
5509 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5510 if the (init) syntax was used. */
5513 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5514 tree asmspec_tree, int flags)
5518 const char *asmspec = NULL;
5519 int was_readonly = 0;
5520 bool var_definition_p = false;
5521 int saved_processing_template_decl;
5524 if (decl == error_mark_node)
5529 error ("assignment (not initialization) in declaration");
5533 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5534 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5535 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5537 type = TREE_TYPE (decl);
5538 if (type == error_mark_node)
5541 /* Assume no cleanup is required. */
5542 cleanup = NULL_TREE;
5543 saved_processing_template_decl = processing_template_decl;
5545 /* If a name was specified, get the string. */
5546 if (global_scope_p (current_binding_level))
5547 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5548 if (asmspec_tree && asmspec_tree != error_mark_node)
5549 asmspec = TREE_STRING_POINTER (asmspec_tree);
5551 if (current_class_type
5552 && CP_DECL_CONTEXT (decl) == current_class_type
5553 && TYPE_BEING_DEFINED (current_class_type)
5554 && (DECL_INITIAL (decl) || init))
5555 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5557 auto_node = type_uses_auto (type);
5560 if (init == NULL_TREE)
5562 error ("declaration of %q#D has no initializer", decl);
5563 TREE_TYPE (decl) = error_mark_node;
5566 if (TREE_CODE (init) == TREE_LIST)
5567 init = build_x_compound_expr_from_list (init, "initializer");
5568 if (describable_type (init))
5570 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5571 if (type == error_mark_node)
5576 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5578 if (init == ridpointers[(int)RID_DELETE])
5580 /* FIXME check this is 1st decl. */
5581 DECL_DELETED_FN (decl) = 1;
5582 DECL_DECLARED_INLINE_P (decl) = 1;
5583 DECL_INITIAL (decl) = error_mark_node;
5586 else if (init == ridpointers[(int)RID_DEFAULT])
5588 if (!defaultable_fn_p (decl))
5590 error ("%qD cannot be defaulted", decl);
5591 DECL_INITIAL (decl) = NULL_TREE;
5594 DECL_DEFAULTED_FN (decl) = 1;
5598 if (processing_template_decl)
5600 bool type_dependent_p;
5602 /* Add this declaration to the statement-tree. */
5603 if (at_function_scope_p ())
5604 add_decl_expr (decl);
5606 type_dependent_p = dependent_type_p (type);
5608 if (check_for_bare_parameter_packs (init))
5611 DECL_INITIAL (decl) = NULL_TREE;
5614 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5616 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5617 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5618 TREE_CONSTANT (decl) = 1;
5621 /* Generally, initializers in templates are expanded when the
5622 template is instantiated. But, if DECL is an integral
5623 constant static data member, then it can be used in future
5624 integral constant expressions, and its value must be
5627 && DECL_CLASS_SCOPE_P (decl)
5628 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5629 && !type_dependent_p
5630 && !value_dependent_init_p (init)))
5633 DECL_INITIAL (decl) = init;
5634 if (TREE_CODE (decl) == VAR_DECL
5635 && !DECL_PRETTY_FUNCTION_P (decl)
5636 && !type_dependent_p)
5637 maybe_deduce_size_from_array_init (decl, init);
5641 if (TREE_CODE (init) == TREE_LIST)
5643 /* If the parenthesized-initializer form was used (e.g.,
5644 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5645 arguments. (There is generally only one.) We convert them
5648 for (; list; list = TREE_CHAIN (list))
5650 tree elt = TREE_VALUE (list);
5651 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5655 init = fold_non_dependent_expr (init);
5656 processing_template_decl = 0;
5659 /* Take care of TYPE_DECLs up front. */
5660 if (TREE_CODE (decl) == TYPE_DECL)
5662 if (type != error_mark_node
5663 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5665 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5666 warning (0, "shadowing previous type declaration of %q#D", decl);
5667 set_identifier_type_value (DECL_NAME (decl), decl);
5670 /* If we have installed this as the canonical typedef for this
5671 type, and that type has not been defined yet, delay emitting
5672 the debug information for it, as we will emit it later. */
5673 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5674 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5675 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5677 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5682 /* A reference will be modified here, as it is initialized. */
5683 if (! DECL_EXTERNAL (decl)
5684 && TREE_READONLY (decl)
5685 && TREE_CODE (type) == REFERENCE_TYPE)
5688 TREE_READONLY (decl) = 0;
5691 if (TREE_CODE (decl) == VAR_DECL)
5693 /* Only variables with trivial initialization and destruction can
5694 have thread-local storage. */
5695 if (DECL_THREAD_LOCAL_P (decl)
5696 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5697 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5698 error ("%qD cannot be thread-local because it has non-trivial "
5699 "type %qT", decl, TREE_TYPE (decl));
5700 /* If this is a local variable that will need a mangled name,
5701 register it now. We must do this before processing the
5702 initializer for the variable, since the initialization might
5703 require a guard variable, and since the mangled name of the
5704 guard variable will depend on the mangled name of this
5706 if (DECL_FUNCTION_SCOPE_P (decl)
5707 && TREE_STATIC (decl)
5708 && !DECL_ARTIFICIAL (decl))
5709 push_local_name (decl);
5710 /* Convert the initializer to the type of DECL, if we have not
5711 already initialized DECL. */
5712 if (!DECL_INITIALIZED_P (decl)
5713 /* If !DECL_EXTERNAL then DECL is being defined. In the
5714 case of a static data member initialized inside the
5715 class-specifier, there can be an initializer even if DECL
5716 is *not* defined. */
5717 && (!DECL_EXTERNAL (decl) || init))
5719 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5722 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5723 /* Allow libjava/prims.cc define primitive classes. */
5724 if (init != NULL_TREE
5725 || jclass == NULL_TREE
5726 || TREE_CODE (jclass) != TYPE_DECL
5727 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5728 || !same_type_ignoring_top_level_qualifiers_p
5729 (type, TREE_TYPE (TREE_TYPE (jclass))))
5730 error ("Java object %qD not allocated with %<new%>", decl);
5735 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5736 if (init_const_expr_p)
5738 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5739 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5740 TREE_CONSTANT (decl) = 1;
5743 init = check_initializer (decl, init, flags, &cleanup);
5744 /* Thread-local storage cannot be dynamically initialized. */
5745 if (DECL_THREAD_LOCAL_P (decl) && init)
5747 error ("%qD is thread-local and so cannot be dynamically "
5748 "initialized", decl);
5752 /* Check that the initializer for a static data member was a
5753 constant. Although we check in the parser that the
5754 initializer is an integral constant expression, we do not
5755 simplify division-by-zero at the point at which it
5756 occurs. Therefore, in:
5758 struct S { static const int i = 7 / 0; };
5760 we issue an error at this point. It would
5761 probably be better to forbid division by zero in
5762 integral constant expressions. */
5763 if (DECL_EXTERNAL (decl) && init)
5765 error ("%qD cannot be initialized by a non-constant expression"
5766 " when being declared", decl);
5767 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5775 The memory occupied by any object of static storage
5776 duration is zero-initialized at program startup before
5777 any other initialization takes place.
5779 We cannot create an appropriate initializer until after
5780 the type of DECL is finalized. If DECL_INITIAL is set,
5781 then the DECL is statically initialized, and any
5782 necessary zero-initialization has already been performed. */
5783 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5784 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5785 /*nelts=*/NULL_TREE,
5786 /*static_storage_p=*/true);
5787 /* Remember that the initialization for this variable has
5789 DECL_INITIALIZED_P (decl) = 1;
5790 /* This declaration is the definition of this variable,
5791 unless we are initializing a static data member within
5792 the class specifier. */
5793 if (!DECL_EXTERNAL (decl))
5794 var_definition_p = true;
5796 /* If the variable has an array type, lay out the type, even if
5797 there is no initializer. It is valid to index through the
5798 array, and we must get TYPE_ALIGN set correctly on the array
5800 else if (TREE_CODE (type) == ARRAY_TYPE)
5803 else if (TREE_CODE (decl) == FIELD_DECL
5804 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5805 error ("non-static data member %qD has Java class type", decl);
5807 /* Add this declaration to the statement-tree. This needs to happen
5808 after the call to check_initializer so that the DECL_EXPR for a
5809 reference temp is added before the DECL_EXPR for the reference itself. */
5810 if (at_function_scope_p ())
5811 add_decl_expr (decl);
5813 /* Let the middle end know about variables and functions -- but not
5814 static data members in uninstantiated class templates. */
5815 if (!saved_processing_template_decl
5816 && (TREE_CODE (decl) == VAR_DECL
5817 || TREE_CODE (decl) == FUNCTION_DECL))
5819 if (TREE_CODE (decl) == VAR_DECL)
5821 layout_var_decl (decl);
5822 maybe_commonize_var (decl);
5825 /* This needs to happen after the linkage is set. */
5826 determine_visibility (decl);
5828 if (var_definition_p && TREE_STATIC (decl))
5830 /* If a TREE_READONLY variable needs initialization
5831 at runtime, it is no longer readonly and we need to
5832 avoid MEM_READONLY_P being set on RTL created for it. */
5835 if (TREE_READONLY (decl))
5836 TREE_READONLY (decl) = 0;
5839 else if (was_readonly)
5840 TREE_READONLY (decl) = 1;
5843 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5845 /* Check for abstractness of the type. Notice that there is no
5846 need to strip array types here since the check for those types
5847 is already done within create_array_type_for_decl. */
5848 if (TREE_CODE (type) == FUNCTION_TYPE
5849 || TREE_CODE (type) == METHOD_TYPE)
5850 abstract_virtuals_error (decl, TREE_TYPE (type));
5852 abstract_virtuals_error (decl, type);
5854 if (TREE_TYPE (decl) == error_mark_node)
5855 /* No initialization required. */
5857 else if (TREE_CODE (decl) == FUNCTION_DECL)
5861 if (init == ridpointers[(int)RID_DEFAULT])
5863 /* An out-of-class default definition is defined at
5864 the point where it is explicitly defaulted. */
5865 if (DECL_INITIAL (decl) == error_mark_node)
5866 synthesize_method (decl);
5869 error ("function %q#D is initialized like a variable", decl);
5871 /* else no initialization required. */
5873 else if (DECL_EXTERNAL (decl)
5874 && ! (DECL_LANG_SPECIFIC (decl)
5875 && DECL_NOT_REALLY_EXTERN (decl)))
5878 DECL_INITIAL (decl) = init;
5880 /* A variable definition. */
5881 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5882 /* Initialize the local variable. */
5883 initialize_local_var (decl, init);
5885 /* If a variable is defined, and then a subsequent
5886 definition with external linkage is encountered, we will
5887 get here twice for the same variable. We want to avoid
5888 calling expand_static_init more than once. For variables
5889 that are not static data members, we can call
5890 expand_static_init only when we actually process the
5891 initializer. It is not legal to redeclare a static data
5892 member, so this issue does not arise in that case. */
5893 else if (var_definition_p && TREE_STATIC (decl))
5894 expand_static_init (decl, init);
5897 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5898 reference, insert it in the statement-tree now. */
5900 push_cleanup (decl, cleanup, false);
5903 processing_template_decl = saved_processing_template_decl;
5906 TREE_READONLY (decl) = 1;
5908 /* If this was marked 'used', be sure it will be output. */
5909 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5910 mark_decl_referenced (decl);
5913 /* Returns a declaration for a VAR_DECL as if:
5915 extern "C" TYPE NAME;
5917 had been seen. Used to create compiler-generated global
5921 declare_global_var (tree name, tree type)
5925 push_to_top_level ();
5926 decl = build_decl (input_location, VAR_DECL, name, type);
5927 TREE_PUBLIC (decl) = 1;
5928 DECL_EXTERNAL (decl) = 1;
5929 DECL_ARTIFICIAL (decl) = 1;
5930 /* If the user has explicitly declared this variable (perhaps
5931 because the code we are compiling is part of a low-level runtime
5932 library), then it is possible that our declaration will be merged
5933 with theirs by pushdecl. */
5934 decl = pushdecl (decl);
5935 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5936 pop_from_top_level ();
5941 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5942 if "__cxa_atexit" is not being used) corresponding to the function
5943 to be called when the program exits. */
5946 get_atexit_fn_ptr_type (void)
5951 if (!atexit_fn_ptr_type_node)
5953 if (flag_use_cxa_atexit
5954 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5955 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5956 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5958 /* The parameter to "atexit" is "void (*)(void)". */
5959 arg_types = void_list_node;
5961 fn_type = build_function_type (void_type_node, arg_types);
5962 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5965 return atexit_fn_ptr_type_node;
5968 /* Returns a pointer to the `atexit' function. Note that if
5969 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5970 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5973 get_atexit_node (void)
5980 bool use_aeabi_atexit;
5985 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5987 /* The declaration for `__cxa_atexit' is:
5989 int __cxa_atexit (void (*)(void *), void *, void *)
5991 We build up the argument types and then then function type
5994 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5995 /* First, build the pointer-to-function type for the first
5997 fn_ptr_type = get_atexit_fn_ptr_type ();
5998 /* Then, build the rest of the argument types. */
5999 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6000 if (use_aeabi_atexit)
6002 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6003 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6007 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6008 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6010 /* And the final __cxa_atexit type. */
6011 fn_type = build_function_type (integer_type_node, arg_types);
6012 fn_ptr_type = build_pointer_type (fn_type);
6013 if (use_aeabi_atexit)
6014 name = "__aeabi_atexit";
6016 name = "__cxa_atexit";
6020 /* The declaration for `atexit' is:
6022 int atexit (void (*)());
6024 We build up the argument types and then then function type
6026 fn_ptr_type = get_atexit_fn_ptr_type ();
6027 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6028 /* Build the final atexit type. */
6029 fn_type = build_function_type (integer_type_node, arg_types);
6033 /* Now, build the function declaration. */
6034 push_lang_context (lang_name_c);
6035 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6036 mark_used (atexit_fndecl);
6037 pop_lang_context ();
6038 atexit_node = decay_conversion (atexit_fndecl);
6043 /* Returns the __dso_handle VAR_DECL. */
6046 get_dso_handle_node (void)
6048 if (dso_handle_node)
6049 return dso_handle_node;
6051 /* Declare the variable. */
6052 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6055 return dso_handle_node;
6058 /* Begin a new function with internal linkage whose job will be simply
6059 to destroy some particular variable. */
6061 static GTY(()) int start_cleanup_cnt;
6064 start_cleanup_fn (void)
6069 bool use_cxa_atexit = flag_use_cxa_atexit
6070 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6072 push_to_top_level ();
6074 /* No need to mangle this. */
6075 push_lang_context (lang_name_c);
6077 /* Build the name of the function. */
6078 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6079 /* Build the function declaration. */
6080 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6081 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6082 /* It's a function with internal linkage, generated by the
6084 TREE_PUBLIC (fndecl) = 0;
6085 DECL_ARTIFICIAL (fndecl) = 1;
6086 /* Make the function `inline' so that it is only emitted if it is
6087 actually needed. It is unlikely that it will be inlined, since
6088 it is only called via a function pointer, but we avoid unnecessary
6089 emissions this way. */
6090 DECL_DECLARED_INLINE_P (fndecl) = 1;
6091 DECL_INTERFACE_KNOWN (fndecl) = 1;
6092 /* Build the parameter. */
6097 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6098 DECL_CONTEXT (parmdecl) = fndecl;
6099 TREE_USED (parmdecl) = 1;
6100 DECL_ARGUMENTS (fndecl) = parmdecl;
6104 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6106 pop_lang_context ();
6108 return current_function_decl;
6111 /* Finish the cleanup function begun by start_cleanup_fn. */
6114 end_cleanup_fn (void)
6116 expand_or_defer_fn (finish_function (0));
6118 pop_from_top_level ();
6121 /* Generate code to handle the destruction of DECL, an object with
6122 static storage duration. */
6125 register_dtor_fn (tree decl)
6134 type = TREE_TYPE (decl);
6135 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6136 return void_zero_node;
6138 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6139 a class object, we can just pass the destructor to
6140 "__cxa_atexit"; we don't have to build a temporary function to do
6142 use_dtor = (flag_use_cxa_atexit
6143 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6144 && CLASS_TYPE_P (type));
6149 /* Find the destructor. */
6150 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6151 gcc_assert (idx >= 0);
6152 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6153 /* Make sure it is accessible. */
6154 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6158 /* Call build_cleanup before we enter the anonymous function so
6159 that any access checks will be done relative to the current
6160 scope, rather than the scope of the anonymous function. */
6161 build_cleanup (decl);
6163 /* Now start the function. */
6164 cleanup = start_cleanup_fn ();
6166 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6167 to the original function, rather than the anonymous one. That
6168 will make the back end think that nested functions are in use,
6169 which causes confusion. */
6170 push_deferring_access_checks (dk_no_check);
6171 fcall = build_cleanup (decl);
6172 pop_deferring_access_checks ();
6174 /* Create the body of the anonymous function. */
6175 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6176 finish_expr_stmt (fcall);
6177 finish_compound_stmt (compound_stmt);
6181 /* Call atexit with the cleanup function. */
6182 mark_used (cleanup);
6183 cleanup = build_address (cleanup);
6184 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6190 /* We must convert CLEANUP to the type that "__cxa_atexit"
6192 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6193 /* "__cxa_atexit" will pass the address of DECL to the
6194 cleanup function. */
6196 addr = build_address (decl);
6197 /* The declared type of the parameter to "__cxa_atexit" is
6198 "void *". For plain "T*", we could just let the
6199 machinery in cp_build_function_call convert it -- but if the
6200 type is "cv-qualified T *", then we need to convert it
6201 before passing it in, to avoid spurious errors. */
6202 addr = build_nop (ptr_type_node, addr);
6205 /* Since the cleanup functions we build ignore the address
6206 they're given, there's no reason to pass the actual address
6207 in, and, in general, it's cheaper to pass NULL than any
6209 addr = null_pointer_node;
6210 args = tree_cons (NULL_TREE,
6211 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6212 tf_warning_or_error),
6214 if (targetm.cxx.use_aeabi_atexit ())
6216 args = tree_cons (NULL_TREE, cleanup, args);
6217 args = tree_cons (NULL_TREE, addr, args);
6221 args = tree_cons (NULL_TREE, addr, args);
6222 args = tree_cons (NULL_TREE, cleanup, args);
6226 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6227 return cp_build_function_call (get_atexit_node (), args,
6228 tf_warning_or_error);
6231 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6232 is its initializer. Generate code to handle the construction
6233 and destruction of DECL. */
6236 expand_static_init (tree decl, tree init)
6238 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6239 gcc_assert (TREE_STATIC (decl));
6241 /* Some variables require no initialization. */
6243 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6244 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6247 if (DECL_FUNCTION_SCOPE_P (decl))
6249 /* Emit code to perform this initialization but once. */
6250 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6251 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6252 tree guard, guard_addr;
6253 tree acquire_fn, release_fn, abort_fn;
6256 /* Emit code to perform this initialization but once. This code
6259 static <type> guard;
6260 if (!guard.first_byte) {
6261 if (__cxa_guard_acquire (&guard)) {
6264 // Do initialization.
6265 flag = true; __cxa_guard_release (&guard);
6266 // Register variable for destruction at end of program.
6268 if (!flag) __cxa_guard_abort (&guard);
6272 Note that the `flag' variable is only set to 1 *after* the
6273 initialization is complete. This ensures that an exception,
6274 thrown during the construction, will cause the variable to
6275 reinitialized when we pass through this code again, as per:
6279 If the initialization exits by throwing an exception, the
6280 initialization is not complete, so it will be tried again
6281 the next time control enters the declaration.
6283 This process should be thread-safe, too; multiple threads
6284 should not be able to initialize the variable more than
6287 /* Create the guard variable. */
6288 guard = get_guard (decl);
6290 /* This optimization isn't safe on targets with relaxed memory
6291 consistency. On such targets we force synchronization in
6292 __cxa_guard_acquire. */
6293 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6295 /* Begin the conditional initialization. */
6296 if_stmt = begin_if_stmt ();
6297 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6298 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6301 if (flag_threadsafe_statics)
6303 guard_addr = build_address (guard);
6305 acquire_fn = get_identifier ("__cxa_guard_acquire");
6306 release_fn = get_identifier ("__cxa_guard_release");
6307 abort_fn = get_identifier ("__cxa_guard_abort");
6308 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6310 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6312 tree vfntype = build_function_type (void_type_node, argtypes);
6313 acquire_fn = push_library_fn
6314 (acquire_fn, build_function_type (integer_type_node, argtypes),
6316 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6317 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6321 release_fn = identifier_global_value (release_fn);
6322 abort_fn = identifier_global_value (abort_fn);
6325 inner_if_stmt = begin_if_stmt ();
6326 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6329 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6330 begin = get_target_expr (boolean_false_node);
6331 flag = TARGET_EXPR_SLOT (begin);
6333 TARGET_EXPR_CLEANUP (begin)
6334 = build3 (COND_EXPR, void_type_node, flag,
6336 build_call_n (abort_fn, 1, guard_addr));
6337 CLEANUP_EH_ONLY (begin) = 1;
6339 /* Do the initialization itself. */
6340 init = add_stmt_to_compound (begin, init);
6341 init = add_stmt_to_compound
6342 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6343 init = add_stmt_to_compound
6344 (init, build_call_n (release_fn, 1, guard_addr));
6347 init = add_stmt_to_compound (init, set_guard (guard));
6349 /* Use atexit to register a function for destroying this static
6351 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6353 finish_expr_stmt (init);
6355 if (flag_threadsafe_statics)
6357 finish_compound_stmt (inner_then_clause);
6358 finish_then_clause (inner_if_stmt);
6359 finish_if_stmt (inner_if_stmt);
6362 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6364 finish_compound_stmt (then_clause);
6365 finish_then_clause (if_stmt);
6366 finish_if_stmt (if_stmt);
6370 static_aggregates = tree_cons (init, decl, static_aggregates);
6374 /* Make TYPE a complete type based on INITIAL_VALUE.
6375 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6376 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6377 3 if the initializer list is empty (in pedantic mode). */
6380 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6383 tree type, elt_type;
6387 unsigned HOST_WIDE_INT i;
6390 /* An array of character type can be initialized from a
6391 brace-enclosed string constant.
6393 FIXME: this code is duplicated from reshape_init. Probably
6394 we should just call reshape_init here? */
6395 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6396 && TREE_CODE (initial_value) == CONSTRUCTOR
6397 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6399 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6400 tree value = VEC_index (constructor_elt, v, 0)->value;
6402 if (TREE_CODE (value) == STRING_CST
6403 && VEC_length (constructor_elt, v) == 1)
6404 initial_value = value;
6407 /* If any of the elements are parameter packs, we can't actually
6408 complete this type now because the array size is dependent. */
6409 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6411 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6414 if (PACK_EXPANSION_P (value))
6420 failure = complete_array_type (ptype, initial_value, do_default);
6422 /* We can create the array before the element type is complete, which
6423 means that we didn't have these two bits set in the original type
6424 either. In completing the type, we are expected to propagate these
6425 bits. See also complete_type which does the same thing for arrays
6428 if (TYPE_DOMAIN (type))
6430 elt_type = TREE_TYPE (type);
6431 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6432 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6433 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6439 /* Return zero if something is declared to be a member of type
6440 CTYPE when in the context of CUR_TYPE. STRING is the error
6441 message to print in that case. Otherwise, quietly return 1. */
6444 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6446 if (ctype && ctype != cur_type)
6448 if (flags == DTOR_FLAG)
6449 error ("destructor for alien class %qT cannot be a member", ctype);
6451 error ("constructor for alien class %qT cannot be a member", ctype);
6457 /* Subroutine of `grokdeclarator'. */
6459 /* Generate errors possibly applicable for a given set of specifiers.
6460 This is for ARM $7.1.2. */
6463 bad_specifiers (tree object,
6472 error ("%qD declared as a %<virtual%> %s", object, type);
6474 error ("%qD declared as an %<inline%> %s", object, type);
6476 error ("%<const%> and %<volatile%> function specifiers on "
6477 "%qD invalid in %s declaration",
6480 error ("%q+D declared as a friend", object);
6482 && (TREE_CODE (object) == TYPE_DECL
6483 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6484 && !TYPE_REFFN_P (TREE_TYPE (object))
6485 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6486 error ("%q+D declared with an exception specification", object);
6489 /* DECL is a member function or static data member and is presently
6490 being defined. Check that the definition is taking place in a
6494 check_class_member_definition_namespace (tree decl)
6496 /* These checks only apply to member functions and static data
6498 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6499 || TREE_CODE (decl) == VAR_DECL);
6500 /* We check for problems with specializations in pt.c in
6501 check_specialization_namespace, where we can issue better
6503 if (processing_specialization)
6505 /* There are no restrictions on the placement of
6506 explicit instantiations. */
6507 if (processing_explicit_instantiation)
6511 A member function definition that appears outside of the
6512 class definition shall appear in a namespace scope enclosing
6513 the class definition.
6517 The definition for a static data member shall appear in a
6518 namespace scope enclosing the member's class definition. */
6519 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6520 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6521 decl, DECL_CONTEXT (decl));
6524 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6525 METHOD_TYPE for a non-static member function; QUALS are the
6526 cv-qualifiers that apply to the function. */
6529 build_this_parm (tree type, cp_cv_quals quals)
6534 cp_cv_quals this_quals;
6536 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6537 /* The `this' parameter is implicitly `const'; it cannot be
6539 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6540 qual_type = cp_build_qualified_type (this_type, this_quals);
6541 parm = build_artificial_parm (this_identifier, qual_type);
6542 cp_apply_type_quals_to_decl (this_quals, parm);
6546 /* CTYPE is class type, or null if non-class.
6547 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6549 DECLARATOR is the function's name.
6550 PARMS is a chain of PARM_DECLs for the function.
6551 VIRTUALP is truthvalue of whether the function is virtual or not.
6552 FLAGS are to be passed through to `grokclassfn'.
6553 QUALS are qualifiers indicating whether the function is `const'
6555 RAISES is a list of exceptions that this function can raise.
6556 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6557 not look, and -1 if we should not call `grokclassfn' at all.
6559 SFK is the kind of special function (if any) for the new function.
6561 Returns `NULL_TREE' if something goes wrong, after issuing
6562 applicable error messages. */
6565 grokfndecl (tree ctype,
6569 tree orig_declarator,
6571 enum overload_flags flags,
6578 special_function_kind sfk,
6583 location_t location)
6586 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6590 type = build_exception_variant (type, raises);
6592 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6594 /* If we have an explicit location, use it, otherwise use whatever
6595 build_lang_decl used (probably input_location). */
6596 if (location != UNKNOWN_LOCATION)
6597 DECL_SOURCE_LOCATION (decl) = location;
6599 if (TREE_CODE (type) == METHOD_TYPE)
6602 parm = build_this_parm (type, quals);
6603 TREE_CHAIN (parm) = parms;
6606 DECL_ARGUMENTS (decl) = parms;
6607 for (t = parms; t; t = TREE_CHAIN (t))
6608 DECL_CONTEXT (t) = decl;
6609 /* Propagate volatile out from type to decl. */
6610 if (TYPE_VOLATILE (type))
6611 TREE_THIS_VOLATILE (decl) = 1;
6613 /* Setup decl according to sfk. */
6616 case sfk_constructor:
6617 case sfk_copy_constructor:
6618 DECL_CONSTRUCTOR_P (decl) = 1;
6620 case sfk_destructor:
6621 DECL_DESTRUCTOR_P (decl) = 1;
6627 /* If pointers to member functions use the least significant bit to
6628 indicate whether a function is virtual, ensure a pointer
6629 to this function will have that bit clear. */
6630 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6631 && TREE_CODE (type) == METHOD_TYPE
6632 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6633 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6636 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6640 ("defining explicit specialization %qD in friend declaration",
6644 tree fns = TREE_OPERAND (orig_declarator, 0);
6645 tree args = TREE_OPERAND (orig_declarator, 1);
6647 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6649 /* Something like `template <class T> friend void f<T>()'. */
6650 error ("invalid use of template-id %qD in declaration "
6651 "of primary template",
6657 /* A friend declaration of the form friend void f<>(). Record
6658 the information in the TEMPLATE_ID_EXPR. */
6659 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6661 if (TREE_CODE (fns) == COMPONENT_REF)
6663 /* Due to bison parser ickiness, we will have already looked
6664 up an operator_name or PFUNCNAME within the current class
6665 (see template_id in parse.y). If the current class contains
6666 such a name, we'll get a COMPONENT_REF here. Undo that. */
6668 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6669 == current_class_type);
6670 fns = TREE_OPERAND (fns, 1);
6672 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6673 || TREE_CODE (fns) == OVERLOAD);
6674 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6676 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6677 if (TREE_PURPOSE (t)
6678 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6680 error ("default arguments are not allowed in declaration "
6681 "of friend template specialization %qD",
6688 error ("%<inline%> is not allowed in declaration of friend "
6689 "template specialization %qD",
6696 /* If this decl has namespace scope, set that up. */
6698 set_decl_namespace (decl, in_namespace, friendp);
6700 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6702 /* `main' and builtins have implicit 'C' linkage. */
6703 if ((MAIN_NAME_P (declarator)
6704 || (IDENTIFIER_LENGTH (declarator) > 10
6705 && IDENTIFIER_POINTER (declarator)[0] == '_'
6706 && IDENTIFIER_POINTER (declarator)[1] == '_'
6707 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6708 && current_lang_name == lang_name_cplusplus
6709 && ctype == NULL_TREE
6710 /* NULL_TREE means global namespace. */
6711 && DECL_CONTEXT (decl) == NULL_TREE)
6712 SET_DECL_LANGUAGE (decl, lang_c);
6714 /* Should probably propagate const out from type to decl I bet (mrs). */
6717 DECL_STATIC_FUNCTION_P (decl) = 1;
6718 DECL_CONTEXT (decl) = ctype;
6723 DECL_CONTEXT (decl) = ctype;
6725 check_class_member_definition_namespace (decl);
6728 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6730 if (processing_template_decl)
6731 error ("cannot declare %<::main%> to be a template");
6733 error ("cannot declare %<::main%> to be inline");
6735 error ("cannot declare %<::main%> to be static");
6740 /* Members of anonymous types and local classes have no linkage; make
6741 them internal. If a typedef is made later, this will be changed. */
6742 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6743 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6748 /* [basic.link]: A name with no linkage (notably, the name of a class
6749 or enumeration declared in a local scope) shall not be used to
6750 declare an entity with linkage.
6752 Only check this for public decls for now. See core 319, 389. */
6753 t = no_linkage_check (TREE_TYPE (decl),
6754 /*relaxed_p=*/false);
6757 if (TYPE_ANONYMOUS_P (t))
6759 if (DECL_EXTERN_C_P (decl))
6760 /* Allow this; it's pretty common in C. */;
6763 permerror (input_location, "non-local function %q#D uses anonymous type",
6765 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6766 permerror (input_location, "%q+#D does not refer to the unqualified "
6767 "type, so it is not used for linkage",
6772 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6776 TREE_PUBLIC (decl) = publicp;
6779 DECL_INTERFACE_KNOWN (decl) = 1;
6780 DECL_NOT_REALLY_EXTERN (decl) = 1;
6783 /* If the declaration was declared inline, mark it as such. */
6785 DECL_DECLARED_INLINE_P (decl) = 1;
6787 DECL_EXTERNAL (decl) = 1;
6788 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6791 ? G_("static member function %qD cannot have cv-qualifier")
6792 : G_("non-member function %qD cannot have cv-qualifier"),
6794 quals = TYPE_UNQUALIFIED;
6797 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6798 && !grok_op_properties (decl, /*complain=*/true))
6801 if (ctype && decl_function_context (decl))
6802 DECL_NO_STATIC_CHAIN (decl) = 1;
6805 /* Make the init_value nonzero so pushdecl knows this is not
6806 tentative. error_mark_node is replaced later with the BLOCK. */
6807 DECL_INITIAL (decl) = error_mark_node;
6809 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6810 TREE_NOTHROW (decl) = 1;
6812 /* Caller will do the rest of this. */
6816 if (ctype != NULL_TREE)
6817 grokclassfn (ctype, decl, flags);
6819 decl = check_explicit_specialization (orig_declarator, decl,
6822 4 * (friendp != 0));
6823 if (decl == error_mark_node)
6828 cplus_decl_attributes (&decl, *attrlist, 0);
6829 *attrlist = NULL_TREE;
6832 /* Check main's type after attributes have been applied. */
6833 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6835 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6838 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6840 error ("%<::main%> must return %<int%>");
6841 newtype = build_function_type (integer_type_node, oldtypeargs);
6842 TREE_TYPE (decl) = newtype;
6845 check_main_parameter_types (decl);
6848 if (ctype != NULL_TREE
6849 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6852 tree old_decl = check_classfn (ctype, decl,
6853 (processing_template_decl
6854 > template_class_depth (ctype))
6855 ? current_template_parms
6858 if (old_decl == error_mark_node)
6866 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6867 /* Because grokfndecl is always supposed to return a
6868 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6869 here. We depend on our callers to figure out that its
6870 really a template that's being returned. */
6871 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6873 if (DECL_STATIC_FUNCTION_P (old_decl)
6874 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6875 /* Remove the `this' parm added by grokclassfn.
6876 XXX Isn't this done in start_function, too? */
6877 revert_static_member_fn (decl);
6878 if (DECL_ARTIFICIAL (old_decl))
6880 error ("definition of implicitly-declared %qD", old_decl);
6884 /* Since we've smashed OLD_DECL to its
6885 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6886 if (TREE_CODE (decl) == TEMPLATE_DECL)
6887 decl = DECL_TEMPLATE_RESULT (decl);
6889 /* Attempt to merge the declarations. This can fail, in
6890 the case of some invalid specialization declarations. */
6891 pushed_scope = push_scope (ctype);
6892 ok = duplicate_decls (decl, old_decl, friendp);
6894 pop_scope (pushed_scope);
6897 error ("no %q#D member function declared in class %qT",
6905 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6908 if (ctype == NULL_TREE || check)
6912 DECL_VIRTUAL_P (decl) = 1;
6917 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6918 the linkage that DECL will receive in the object file. */
6921 set_linkage_for_static_data_member (tree decl)
6923 /* A static data member always has static storage duration and
6924 external linkage. Note that static data members are forbidden in
6925 local classes -- the only situation in which a class has
6926 non-external linkage. */
6927 TREE_PUBLIC (decl) = 1;
6928 TREE_STATIC (decl) = 1;
6929 /* For non-template classes, static data members are always put
6930 out in exactly those files where they are defined, just as
6931 with ordinary namespace-scope variables. */
6932 if (!processing_template_decl)
6933 DECL_INTERFACE_KNOWN (decl) = 1;
6936 /* Create a VAR_DECL named NAME with the indicated TYPE.
6938 If SCOPE is non-NULL, it is the class type or namespace containing
6939 the variable. If SCOPE is NULL, the variable should is created in
6940 the innermost enclosings scope. */
6943 grokvardecl (tree type,
6945 const cp_decl_specifier_seq *declspecs,
6951 tree explicit_scope;
6953 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6955 /* Compute the scope in which to place the variable, but remember
6956 whether or not that scope was explicitly specified by the user. */
6957 explicit_scope = scope;
6960 /* An explicit "extern" specifier indicates a namespace-scope
6962 if (declspecs->storage_class == sc_extern)
6963 scope = current_namespace;
6964 else if (!at_function_scope_p ())
6965 scope = current_scope ();
6969 && (/* If the variable is a namespace-scope variable declared in a
6970 template, we need DECL_LANG_SPECIFIC. */
6971 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6972 /* Similarly for namespace-scope variables with language linkage
6974 || (TREE_CODE (scope) == NAMESPACE_DECL
6975 && current_lang_name != lang_name_cplusplus)
6976 /* Similarly for static data members. */
6978 decl = build_lang_decl (VAR_DECL, name, type);
6980 decl = build_decl (input_location, VAR_DECL, name, type);
6982 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6983 set_decl_namespace (decl, explicit_scope, 0);
6985 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6987 if (declspecs->storage_class == sc_extern)
6989 DECL_THIS_EXTERN (decl) = 1;
6990 DECL_EXTERNAL (decl) = !initialized;
6993 if (DECL_CLASS_SCOPE_P (decl))
6995 set_linkage_for_static_data_member (decl);
6996 /* This function is only called with out-of-class definitions. */
6997 DECL_EXTERNAL (decl) = 0;
6998 check_class_member_definition_namespace (decl);
7000 /* At top level, either `static' or no s.c. makes a definition
7001 (perhaps tentative), and absence of `static' makes it public. */
7002 else if (toplevel_bindings_p ())
7004 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7005 && (DECL_THIS_EXTERN (decl) || ! constp));
7006 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7008 /* Not at top level, only `static' makes a static definition. */
7011 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7012 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7015 if (declspecs->specs[(int)ds_thread])
7016 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7018 if (TREE_PUBLIC (decl))
7020 /* [basic.link]: A name with no linkage (notably, the name of a class
7021 or enumeration declared in a local scope) shall not be used to
7022 declare an entity with linkage.
7024 Only check this for public decls for now. */
7025 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7028 if (TYPE_ANONYMOUS_P (t))
7030 if (DECL_EXTERN_C_P (decl))
7031 /* Allow this; it's pretty common in C. */
7035 /* DRs 132, 319 and 389 seem to indicate types with
7036 no linkage can only be used to declare extern "C"
7037 entities. Since it's not always an error in the
7038 ISO C++ 90 Standard, we only issue a warning. */
7039 warning (0, "non-local variable %q#D uses anonymous type",
7041 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7042 warning (0, "%q+#D does not refer to the unqualified "
7043 "type, so it is not used for linkage",
7048 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7052 DECL_INTERFACE_KNOWN (decl) = 1;
7057 /* Create and return a canonical pointer to member function type, for
7058 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7061 build_ptrmemfunc_type (tree type)
7065 tree unqualified_variant = NULL_TREE;
7067 if (type == error_mark_node)
7070 /* If a canonical type already exists for this type, use it. We use
7071 this method instead of type_hash_canon, because it only does a
7072 simple equality check on the list of field members. */
7074 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7077 /* Make sure that we always have the unqualified pointer-to-member
7079 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7081 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7083 t = make_class_type (RECORD_TYPE);
7084 xref_basetypes (t, NULL_TREE);
7086 /* Let the front end know this is a pointer to member function... */
7087 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7088 /* ... and not really a class type. */
7089 SET_CLASS_TYPE_P (t, 0);
7091 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7094 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7096 TREE_CHAIN (field) = fields;
7099 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7101 /* Zap out the name so that the back end will give us the debugging
7102 information for this anonymous RECORD_TYPE. */
7103 TYPE_NAME (t) = NULL_TREE;
7105 /* If this is not the unqualified form of this pointer-to-member
7106 type, set the TYPE_MAIN_VARIANT for this type to be the
7107 unqualified type. Since they are actually RECORD_TYPEs that are
7108 not variants of each other, we must do this manually. */
7109 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7111 t = build_qualified_type (t, cp_type_quals (type));
7112 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7113 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7114 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7115 TREE_TYPE (TYPE_BINFO (t)) = t;
7118 /* Cache this pointer-to-member type so that we can find it again
7120 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7122 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7123 SET_TYPE_STRUCTURAL_EQUALITY (t);
7124 else if (TYPE_CANONICAL (type) != type)
7125 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7130 /* Create and return a pointer to data member type. */
7133 build_ptrmem_type (tree class_type, tree member_type)
7135 if (TREE_CODE (member_type) == METHOD_TYPE)
7139 arg_types = TYPE_ARG_TYPES (member_type);
7140 class_type = (cp_build_qualified_type
7142 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7144 = build_method_type_directly (class_type,
7145 TREE_TYPE (member_type),
7146 TREE_CHAIN (arg_types));
7147 return build_ptrmemfunc_type (build_pointer_type (member_type));
7151 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7152 return build_offset_type (class_type, member_type);
7156 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7157 Check to see that the definition is valid. Issue appropriate error
7158 messages. Return 1 if the definition is particularly bad, or 0
7162 check_static_variable_definition (tree decl, tree type)
7164 /* Motion 10 at San Diego: If a static const integral data member is
7165 initialized with an integral constant expression, the initializer
7166 may appear either in the declaration (within the class), or in
7167 the definition, but not both. If it appears in the class, the
7168 member is a member constant. The file-scope definition is always
7170 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7172 error ("invalid in-class initialization of static data member "
7173 "of non-integral type %qT",
7175 /* If we just return the declaration, crashes will sometimes
7176 occur. We therefore return void_type_node, as if this were a
7177 friend declaration, to cause callers to completely ignore
7178 this declaration. */
7181 else if (!CP_TYPE_CONST_P (type))
7182 error ("ISO C++ forbids in-class initialization of non-const "
7183 "static member %qD",
7185 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7186 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7187 "%qD of non-integral type %qT", decl, type);
7192 /* Given the SIZE (i.e., number of elements) in an array, compute an
7193 appropriate index type for the array. If non-NULL, NAME is the
7194 name of the thing being declared. */
7197 compute_array_index_type (tree name, tree size)
7201 tree abi_1_itype = NULL_TREE;
7203 if (error_operand_p (size))
7204 return error_mark_node;
7206 type = TREE_TYPE (size);
7207 /* The array bound must be an integer type. */
7208 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7211 error ("size of array %qD has non-integral type %qT", name, type);
7213 error ("size of array has non-integral type %qT", type);
7214 size = integer_one_node;
7215 type = TREE_TYPE (size);
7218 /* We can only call value_dependent_expression_p on integral constant
7219 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7220 set if this isn't one. */
7221 if (processing_template_decl
7222 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7224 /* We cannot do any checking for a SIZE that isn't known to be
7225 constant. Just build the index type and mark that it requires
7226 structural equality checks. */
7227 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7228 size, integer_one_node));
7229 if (!TREE_SIDE_EFFECTS (size))
7231 TYPE_DEPENDENT_P (itype) = 1;
7232 TYPE_DEPENDENT_P_VALID (itype) = 1;
7234 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7238 if (!abi_version_at_least (2) && processing_template_decl)
7239 /* For abi-1, we handled all instances in templates the same way,
7240 even when they were non-dependent. This affects the manglings
7241 produced. So, we do the normal checking for non-dependent
7242 sizes, but at the end we'll return the same type that abi-1
7243 would have, but with TYPE_CANONICAL set to the "right"
7244 value that the current ABI would provide. */
7245 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7246 size, integer_one_node));
7248 /* The size might be the result of a cast. */
7249 STRIP_TYPE_NOPS (size);
7251 /* It might be a const variable or enumeration constant. */
7252 size = integral_constant_value (size);
7254 /* Normally, the array-bound will be a constant. */
7255 if (TREE_CODE (size) == INTEGER_CST)
7257 /* Check to see if the array bound overflowed. Make that an
7258 error, no matter how generous we're being. */
7259 constant_expression_error (size);
7261 /* An array must have a positive number of elements. */
7262 if (INT_CST_LT (size, integer_zero_node))
7265 error ("size of array %qD is negative", name);
7267 error ("size of array is negative");
7268 size = integer_one_node;
7270 /* As an extension we allow zero-sized arrays. We always allow
7271 them in system headers because glibc uses them. */
7272 else if (integer_zerop (size) && !in_system_header)
7275 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7277 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7280 else if (TREE_CONSTANT (size))
7282 /* `(int) &fn' is not a valid array bound. */
7284 error ("size of array %qD is not an integral constant-expression",
7287 error ("size of array is not an integral constant-expression");
7288 size = integer_one_node;
7290 else if (pedantic && warn_vla != 0)
7293 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7295 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7297 else if (warn_vla > 0)
7301 "variable length array %qD is used", name);
7304 "variable length array is used");
7307 if (processing_template_decl && !TREE_CONSTANT (size))
7308 /* A variable sized array. */
7309 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7312 HOST_WIDE_INT saved_processing_template_decl;
7314 /* Compute the index of the largest element in the array. It is
7315 one less than the number of elements in the array. We save
7316 and restore PROCESSING_TEMPLATE_DECL so that computations in
7317 cp_build_binary_op will be appropriately folded. */
7318 saved_processing_template_decl = processing_template_decl;
7319 processing_template_decl = 0;
7320 itype = cp_build_binary_op (input_location,
7322 cp_convert (ssizetype, size),
7323 cp_convert (ssizetype, integer_one_node),
7324 tf_warning_or_error);
7325 itype = fold (itype);
7326 processing_template_decl = saved_processing_template_decl;
7328 if (!TREE_CONSTANT (itype))
7329 /* A variable sized array. */
7330 itype = variable_size (itype);
7331 /* Make sure that there was no overflow when creating to a signed
7332 index type. (For example, on a 32-bit machine, an array with
7333 size 2^32 - 1 is too big.) */
7334 else if (TREE_CODE (itype) == INTEGER_CST
7335 && TREE_OVERFLOW (itype))
7337 error ("overflow in array dimension");
7338 TREE_OVERFLOW (itype) = 0;
7342 /* Create and return the appropriate index type. */
7345 tree t = build_index_type (itype);
7346 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7350 return build_index_type (itype);
7353 /* Returns the scope (if any) in which the entity declared by
7354 DECLARATOR will be located. If the entity was declared with an
7355 unqualified name, NULL_TREE is returned. */
7358 get_scope_of_declarator (const cp_declarator *declarator)
7360 while (declarator && declarator->kind != cdk_id)
7361 declarator = declarator->declarator;
7363 /* If the declarator-id is a SCOPE_REF, the scope in which the
7364 declaration occurs is the first operand. */
7366 && declarator->u.id.qualifying_scope)
7367 return declarator->u.id.qualifying_scope;
7369 /* Otherwise, the declarator is not a qualified name; the entity will
7370 be declared in the current scope. */
7374 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7375 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7379 create_array_type_for_decl (tree name, tree type, tree size)
7381 tree itype = NULL_TREE;
7382 const char* error_msg;
7384 /* If things have already gone awry, bail now. */
7385 if (type == error_mark_node || size == error_mark_node)
7386 return error_mark_node;
7388 /* Assume that everything will go OK. */
7391 /* There are some types which cannot be array elements. */
7392 switch (TREE_CODE (type))
7395 error_msg = "array of void";
7399 error_msg = "array of functions";
7402 case REFERENCE_TYPE:
7403 error_msg = "array of references";
7407 error_msg = "array of function members";
7414 /* If something went wrong, issue an error-message and return. */
7418 error ("declaration of %qD as %s", name, error_msg);
7420 error ("creating %s", error_msg);
7422 return error_mark_node;
7427 The constant expressions that specify the bounds of the arrays
7428 can be omitted only for the first member of the sequence. */
7429 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7432 error ("declaration of %qD as multidimensional array must "
7433 "have bounds for all dimensions except the first",
7436 error ("multidimensional array must have bounds for all "
7437 "dimensions except the first");
7439 return error_mark_node;
7442 /* Figure out the index type for the array. */
7444 itype = compute_array_index_type (name, size);
7447 T is called the array element type; this type shall not be [...] an
7448 abstract class type. */
7449 abstract_virtuals_error (name, type);
7451 return build_cplus_array_type (type, itype);
7454 /* Check that it's OK to declare a function with the indicated TYPE.
7455 SFK indicates the kind of special function (if any) that this
7456 function is. OPTYPE is the type given in a conversion operator
7457 declaration, or the class type for a constructor/destructor.
7458 Returns the actual return type of the function; that
7459 may be different than TYPE if an error occurs, or for certain
7460 special functions. */
7463 check_special_function_return_type (special_function_kind sfk,
7469 case sfk_constructor:
7471 error ("return type specification for constructor invalid");
7473 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7474 type = build_pointer_type (optype);
7476 type = void_type_node;
7479 case sfk_destructor:
7481 error ("return type specification for destructor invalid");
7482 /* We can't use the proper return type here because we run into
7483 problems with ambiguous bases and covariant returns.
7484 Java classes are left unchanged because (void *) isn't a valid
7485 Java type, and we don't want to change the Java ABI. */
7486 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7487 type = build_pointer_type (void_type_node);
7489 type = void_type_node;
7492 case sfk_conversion:
7494 error ("return type specified for %<operator %T%>", optype);
7505 /* A variable or data member (whose unqualified name is IDENTIFIER)
7506 has been declared with the indicated TYPE. If the TYPE is not
7507 acceptable, issue an error message and return a type to use for
7508 error-recovery purposes. */
7511 check_var_type (tree identifier, tree type)
7513 if (VOID_TYPE_P (type))
7516 error ("unnamed variable or field declared void");
7517 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7519 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7520 error ("variable or field %qE declared void", identifier);
7523 error ("variable or field declared void");
7524 type = error_mark_node;
7530 /* Given declspecs and a declarator (abstract or otherwise), determine
7531 the name and type of the object declared and construct a DECL node
7534 DECLSPECS points to the representation of declaration-specifier
7535 sequence that precedes declarator.
7537 DECL_CONTEXT says which syntactic context this declaration is in:
7538 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7539 FUNCDEF for a function definition. Like NORMAL but a few different
7540 error messages in each case. Return value may be zero meaning
7541 this definition is too screwy to try to parse.
7542 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7543 handle member functions (which have FIELD context).
7544 Return value may be zero meaning this definition is too screwy to
7546 PARM for a parameter declaration (either within a function prototype
7547 or before a function body). Make a PARM_DECL, or return void_type_node.
7548 CATCHPARM for a parameter declaration before a catch clause.
7549 TYPENAME if for a typename (in a cast or sizeof).
7550 Don't make a DECL node; just return the ..._TYPE node.
7551 FIELD for a struct or union field; make a FIELD_DECL.
7552 BITFIELD for a field with specified width.
7553 INITIALIZED is as for start_decl.
7555 ATTRLIST is a pointer to the list of attributes, which may be NULL
7556 if there are none; *ATTRLIST may be modified if attributes from inside
7557 the declarator should be applied to the declaration.
7559 When this function is called, scoping variables (such as
7560 CURRENT_CLASS_TYPE) should reflect the scope in which the
7561 declaration occurs, not the scope in which the new declaration will
7562 be placed. For example, on:
7566 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7569 Returns a DECL (if a declarator is present), a TYPE (if there is no
7570 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7574 grokdeclarator (const cp_declarator *declarator,
7575 const cp_decl_specifier_seq *declspecs,
7576 enum decl_context decl_context,
7580 tree type = NULL_TREE;
7582 int virtualp, explicitp, friendp, inlinep, staticp;
7583 int explicit_int = 0;
7584 int explicit_char = 0;
7585 int defaulted_int = 0;
7586 tree dependent_name = NULL_TREE;
7588 tree typedef_decl = NULL_TREE;
7589 const char *name = NULL;
7590 tree typedef_type = NULL_TREE;
7591 /* True if this declarator is a function definition. */
7592 bool funcdef_flag = false;
7593 cp_declarator_kind innermost_code = cdk_error;
7596 /* See the code below that used this. */
7597 tree decl_attr = NULL_TREE;
7600 /* Keep track of what sort of function is being processed
7601 so that we can warn about default return values, or explicit
7602 return values which do not match prescribed defaults. */
7603 special_function_kind sfk = sfk_none;
7605 tree dname = NULL_TREE;
7606 tree ctor_return_type = NULL_TREE;
7607 enum overload_flags flags = NO_SPECIAL;
7608 /* cv-qualifiers that apply to the declarator, for a declaration of
7609 a member function. */
7610 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7611 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7613 tree raises = NULL_TREE;
7614 int template_count = 0;
7615 tree returned_attrs = NULL_TREE;
7616 tree parms = NULL_TREE;
7617 const cp_declarator *id_declarator;
7618 /* The unqualified name of the declarator; either an
7619 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7620 tree unqualified_id;
7621 /* The class type, if any, in which this entity is located,
7622 or NULL_TREE if none. Note that this value may be different from
7623 the current class type; for example if an attempt is made to declare
7624 "A::f" inside "B", this value will be "A". */
7625 tree ctype = current_class_type;
7626 /* The NAMESPACE_DECL for the namespace in which this entity is
7627 located. If an unqualified name is used to declare the entity,
7628 this value will be NULL_TREE, even if the entity is located at
7630 tree in_namespace = NULL_TREE;
7631 cp_storage_class storage_class;
7632 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7633 bool type_was_error_mark_node = false;
7634 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7635 bool set_no_warning = false;
7636 bool template_type_arg = false;
7639 signed_p = declspecs->specs[(int)ds_signed];
7640 unsigned_p = declspecs->specs[(int)ds_unsigned];
7641 short_p = declspecs->specs[(int)ds_short];
7642 long_p = declspecs->specs[(int)ds_long];
7643 longlong = declspecs->specs[(int)ds_long] >= 2;
7644 thread_p = declspecs->specs[(int)ds_thread];
7646 if (decl_context == FUNCDEF)
7647 funcdef_flag = true, decl_context = NORMAL;
7648 else if (decl_context == MEMFUNCDEF)
7649 funcdef_flag = true, decl_context = FIELD;
7650 else if (decl_context == BITFIELD)
7651 bitfield = 1, decl_context = FIELD;
7652 else if (decl_context == TEMPLATE_TYPE_ARG)
7653 template_type_arg = true, decl_context = TYPENAME;
7655 if (initialized > 1)
7656 funcdef_flag = true;
7658 /* Look inside a declarator for the name being declared
7659 and get it as a string, for an error message. */
7660 for (id_declarator = declarator;
7662 id_declarator = id_declarator->declarator)
7664 if (id_declarator->kind != cdk_id)
7665 innermost_code = id_declarator->kind;
7667 switch (id_declarator->kind)
7670 if (id_declarator->declarator
7671 && id_declarator->declarator->kind == cdk_id)
7673 sfk = id_declarator->declarator->u.id.sfk;
7674 if (sfk == sfk_destructor)
7681 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7682 tree decl = id_declarator->u.id.unqualified_name;
7685 if (qualifying_scope)
7687 if (at_function_scope_p ())
7691 A declarator-id shall not be qualified except
7694 None of the cases are permitted in block
7696 if (qualifying_scope == global_namespace)
7697 error ("invalid use of qualified-name %<::%D%>",
7699 else if (TYPE_P (qualifying_scope))
7700 error ("invalid use of qualified-name %<%T::%D%>",
7701 qualifying_scope, decl);
7703 error ("invalid use of qualified-name %<%D::%D%>",
7704 qualifying_scope, decl);
7705 return error_mark_node;
7707 else if (TYPE_P (qualifying_scope))
7709 ctype = qualifying_scope;
7710 if (innermost_code != cdk_function
7711 && current_class_type
7712 && !UNIQUELY_DERIVED_FROM_P (ctype,
7713 current_class_type))
7715 error ("type %qT is not derived from type %qT",
7716 ctype, current_class_type);
7717 return error_mark_node;
7720 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7721 in_namespace = qualifying_scope;
7723 switch (TREE_CODE (decl))
7729 if (innermost_code != cdk_function)
7731 error ("declaration of %qD as non-function", decl);
7732 return error_mark_node;
7734 else if (!qualifying_scope
7735 && !(current_class_type && at_class_scope_p ()))
7737 error ("declaration of %qD as non-member", decl);
7738 return error_mark_node;
7741 type = TREE_OPERAND (decl, 0);
7743 type = constructor_name (type);
7744 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7749 case TEMPLATE_ID_EXPR:
7751 tree fns = TREE_OPERAND (decl, 0);
7754 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7756 gcc_assert (is_overloaded_fn (dname));
7757 dname = DECL_NAME (get_first_fn (dname));
7762 case IDENTIFIER_NODE:
7763 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7766 if (C_IS_RESERVED_WORD (dname))
7768 error ("declarator-id missing; using reserved word %qD",
7770 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7772 else if (!IDENTIFIER_TYPENAME_P (dname))
7773 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7776 gcc_assert (flags == NO_SPECIAL);
7777 flags = TYPENAME_FLAG;
7778 ctor_return_type = TREE_TYPE (dname);
7779 sfk = sfk_conversion;
7780 if (is_typename_at_global_scope (dname))
7781 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7783 name = "<invalid operator>";
7800 return error_mark_node;
7805 if (id_declarator->kind == cdk_id)
7811 The declarator in a function-definition shall have the form
7812 D1 ( parameter-declaration-clause) ... */
7813 if (funcdef_flag && innermost_code != cdk_function)
7815 error ("function definition does not declare parameters");
7816 return error_mark_node;
7819 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7820 && innermost_code != cdk_function
7821 && ! (ctype && !declspecs->any_specifiers_p))
7823 error ("declaration of %qD as non-function", dname);
7824 return error_mark_node;
7827 /* Anything declared one level down from the top level
7828 must be one of the parameters of a function
7829 (because the body is at least two levels down). */
7831 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7832 by not allowing C++ class definitions to specify their parameters
7833 with xdecls (must be spec.d in the parmlist).
7835 Since we now wait to push a class scope until we are sure that
7836 we are in a legitimate method context, we must set oldcname
7837 explicitly (since current_class_name is not yet alive).
7839 We also want to avoid calling this a PARM if it is in a namespace. */
7841 if (decl_context == NORMAL && !toplevel_bindings_p ())
7843 struct cp_binding_level *b = current_binding_level;
7844 current_binding_level = b->level_chain;
7845 if (current_binding_level != 0 && toplevel_bindings_p ())
7846 decl_context = PARM;
7847 current_binding_level = b;
7851 name = decl_context == PARM ? "parameter" : "type name";
7853 /* If there were multiple types specified in the decl-specifier-seq,
7854 issue an error message. */
7855 if (declspecs->multiple_types_p)
7857 error ("two or more data types in declaration of %qs", name);
7858 return error_mark_node;
7861 if (declspecs->conflicting_specifiers_p)
7863 error ("conflicting specifiers in declaration of %qs", name);
7864 return error_mark_node;
7867 /* Extract the basic type from the decl-specifier-seq. */
7868 type = declspecs->type;
7869 if (type == error_mark_node)
7872 type_was_error_mark_node = true;
7874 /* If the entire declaration is itself tagged as deprecated then
7875 suppress reports of deprecated items. */
7876 if (type && TREE_DEPRECATED (type)
7877 && deprecated_state != DEPRECATED_SUPPRESS)
7878 warn_deprecated_use (type, NULL_TREE);
7879 if (type && TREE_CODE (type) == TYPE_DECL)
7881 typedef_decl = type;
7882 type = TREE_TYPE (typedef_decl);
7883 if (TREE_DEPRECATED (type)
7884 && DECL_ARTIFICIAL (typedef_decl)
7885 && deprecated_state != DEPRECATED_SUPPRESS)
7886 warn_deprecated_use (type, NULL_TREE);
7888 /* No type at all: default to `int', and set DEFAULTED_INT
7889 because it was not a user-defined typedef. */
7890 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7892 /* These imply 'int'. */
7893 type = integer_type_node;
7897 explicit_int = declspecs->explicit_int_p;
7898 explicit_char = declspecs->explicit_char_p;
7901 /* See the code below that used this. */
7903 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7905 typedef_type = type;
7908 if (sfk != sfk_conversion)
7909 ctor_return_type = ctype;
7911 if (sfk != sfk_none)
7912 type = check_special_function_return_type (sfk, type,
7914 else if (type == NULL_TREE)
7920 /* We handle `main' specially here, because 'main () { }' is so
7921 common. With no options, it is allowed. With -Wreturn-type,
7922 it is a warning. It is only an error with -pedantic-errors. */
7923 is_main = (funcdef_flag
7924 && dname && MAIN_NAME_P (dname)
7925 && ctype == NULL_TREE
7926 && in_namespace == NULL_TREE
7927 && current_namespace == global_namespace);
7929 if (type_was_error_mark_node)
7930 /* We've already issued an error, don't complain more. */;
7931 else if (in_system_header || flag_ms_extensions)
7932 /* Allow it, sigh. */;
7934 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7936 pedwarn (input_location, OPT_pedantic,
7937 "ISO C++ forbids declaration of %qs with no type", name);
7939 warning (OPT_Wreturn_type,
7940 "ISO C++ forbids declaration of %qs with no type", name);
7942 type = integer_type_node;
7947 /* Now process the modifiers that were specified
7948 and check for invalid combinations. */
7950 /* Long double is a special combination. */
7951 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7954 type = build_qualified_type (long_double_type_node,
7955 cp_type_quals (type));
7958 /* Check all other uses of type modifiers. */
7960 if (unsigned_p || signed_p || long_p || short_p)
7964 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7965 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7966 else if (signed_p && unsigned_p)
7967 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7968 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7969 error ("%<long long%> invalid for %qs", name);
7970 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7971 error ("%<long%> invalid for %qs", name);
7972 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7973 error ("%<short%> invalid for %qs", name);
7974 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7975 error ("%<long%> or %<short%> invalid for %qs", name);
7976 else if ((long_p || short_p) && explicit_char)
7977 error ("%<long%> or %<short%> specified with char for %qs", name);
7978 else if (long_p && short_p)
7979 error ("%<long%> and %<short%> specified together for %qs", name);
7980 else if (type == char16_type_node || type == char32_type_node)
7982 if (signed_p || unsigned_p)
7983 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7984 else if (short_p || long_p)
7985 error ("%<short%> or %<long%> invalid for %qs", name);
7990 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7992 pedwarn (input_location, OPT_pedantic,
7993 "long, short, signed or unsigned used invalidly for %qs",
7995 if (flag_pedantic_errors)
8000 /* Discard the type modifiers if they are invalid. */
8011 /* Decide whether an integer type is signed or not.
8012 Optionally treat bitfields as signed by default. */
8016 It is implementation-defined whether a plain (neither
8017 explicitly signed or unsigned) char, short, int, or long
8018 bit-field is signed or unsigned.
8020 Naturally, we extend this to long long as well. Note that
8021 this does not include wchar_t. */
8022 || (bitfield && !flag_signed_bitfields
8024 /* A typedef for plain `int' without `signed' can be
8025 controlled just like plain `int', but a typedef for
8026 `signed int' cannot be so controlled. */
8028 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8029 && TREE_CODE (type) == INTEGER_TYPE
8030 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8033 type = long_long_unsigned_type_node;
8035 type = long_unsigned_type_node;
8037 type = short_unsigned_type_node;
8038 else if (type == char_type_node)
8039 type = unsigned_char_type_node;
8040 else if (typedef_decl)
8041 type = unsigned_type_for (type);
8043 type = unsigned_type_node;
8045 else if (signed_p && type == char_type_node)
8046 type = signed_char_type_node;
8048 type = long_long_integer_type_node;
8050 type = long_integer_type_node;
8052 type = short_integer_type_node;
8054 if (declspecs->specs[(int)ds_complex])
8056 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8057 error ("complex invalid for %qs", name);
8058 /* If we just have "complex", it is equivalent to
8059 "complex double", but if any modifiers at all are specified it is
8060 the complex form of TYPE. E.g, "complex short" is
8061 "complex short int". */
8063 else if (defaulted_int && ! longlong
8064 && ! (long_p || short_p || signed_p || unsigned_p))
8065 type = complex_double_type_node;
8066 else if (type == integer_type_node)
8067 type = complex_integer_type_node;
8068 else if (type == float_type_node)
8069 type = complex_float_type_node;
8070 else if (type == double_type_node)
8071 type = complex_double_type_node;
8072 else if (type == long_double_type_node)
8073 type = complex_long_double_type_node;
8075 type = build_complex_type (type);
8078 type_quals = TYPE_UNQUALIFIED;
8079 if (declspecs->specs[(int)ds_const])
8080 type_quals |= TYPE_QUAL_CONST;
8081 if (declspecs->specs[(int)ds_volatile])
8082 type_quals |= TYPE_QUAL_VOLATILE;
8083 if (declspecs->specs[(int)ds_restrict])
8084 type_quals |= TYPE_QUAL_RESTRICT;
8085 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8086 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8089 if (TREE_CODE (type) == FUNCTION_TYPE
8090 && type_quals != TYPE_UNQUALIFIED)
8092 /* This was an error in C++98 (cv-qualifiers cannot be added to
8093 a function type), but DR 295 makes the code well-formed by
8094 dropping the extra qualifiers. */
8097 tree bad_type = build_qualified_type (type, type_quals);
8098 pedwarn (input_location, OPT_pedantic,
8099 "ignoring %qV qualifiers added to function type %qT",
8102 type_quals = TYPE_UNQUALIFIED;
8104 type_quals |= cp_type_quals (type);
8105 type = cp_build_qualified_type_real
8106 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8107 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8108 /* We might have ignored or rejected some of the qualifiers. */
8109 type_quals = cp_type_quals (type);
8112 inlinep = !! declspecs->specs[(int)ds_inline];
8113 virtualp = !! declspecs->specs[(int)ds_virtual];
8114 explicitp = !! declspecs->specs[(int)ds_explicit];
8116 storage_class = declspecs->storage_class;
8117 if (storage_class == sc_static)
8118 staticp = 1 + (decl_context == FIELD);
8120 if (virtualp && staticp == 2)
8122 error ("member %qD cannot be declared both virtual and static", dname);
8123 storage_class = sc_none;
8126 friendp = !! declspecs->specs[(int)ds_friend];
8128 if (dependent_name && !friendp)
8130 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8131 return error_mark_node;
8134 /* Issue errors about use of storage classes for parameters. */
8135 if (decl_context == PARM)
8137 if (declspecs->specs[(int)ds_typedef])
8139 error ("typedef declaration invalid in parameter declaration");
8140 return error_mark_node;
8142 else if (storage_class == sc_static
8143 || storage_class == sc_extern
8145 error ("storage class specifiers invalid in parameter declarations");
8147 if (type_uses_auto (type))
8149 error ("parameter declared %<auto%>");
8150 type = error_mark_node;
8154 /* Give error if `virtual' is used outside of class declaration. */
8156 && (current_class_name == NULL_TREE || decl_context != FIELD))
8158 error ("%<virtual%> outside class declaration");
8162 /* Static anonymous unions are dealt with here. */
8163 if (staticp && decl_context == TYPENAME
8165 && ANON_AGGR_TYPE_P (declspecs->type))
8166 decl_context = FIELD;
8168 /* Warn about storage classes that are invalid for certain
8169 kinds of declarations (parameters, typenames, etc.). */
8172 && storage_class != sc_extern
8173 && storage_class != sc_static)
8174 || declspecs->specs[(int)ds_typedef]))
8176 error ("multiple storage classes in declaration of %qs", name);
8179 if (decl_context != NORMAL
8180 && ((storage_class != sc_none
8181 && storage_class != sc_mutable)
8184 if ((decl_context == PARM || decl_context == CATCHPARM)
8185 && (storage_class == sc_register
8186 || storage_class == sc_auto))
8188 else if (declspecs->specs[(int)ds_typedef])
8190 else if (decl_context == FIELD
8191 /* C++ allows static class elements. */
8192 && storage_class == sc_static)
8193 /* C++ also allows inlines and signed and unsigned elements,
8194 but in those cases we don't come in here. */
8198 if (decl_context == FIELD)
8199 error ("storage class specified for %qs", name);
8202 if (decl_context == PARM || decl_context == CATCHPARM)
8203 error ("storage class specified for parameter %qs", name);
8205 error ("storage class specified for typename");
8207 if (storage_class == sc_register
8208 || storage_class == sc_auto
8209 || storage_class == sc_extern
8211 storage_class = sc_none;
8214 else if (storage_class == sc_extern && funcdef_flag
8215 && ! toplevel_bindings_p ())
8216 error ("nested function %qs declared %<extern%>", name);
8217 else if (toplevel_bindings_p ())
8219 if (storage_class == sc_auto)
8220 error ("top-level declaration of %qs specifies %<auto%>", name);
8223 && storage_class != sc_extern
8224 && storage_class != sc_static)
8226 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8231 if (storage_class && friendp)
8233 error ("storage class specifiers invalid in friend function declarations");
8234 storage_class = sc_none;
8239 unqualified_id = NULL_TREE;
8242 unqualified_id = id_declarator->u.id.unqualified_name;
8243 switch (TREE_CODE (unqualified_id))
8246 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8247 if (TYPE_P (unqualified_id))
8248 unqualified_id = constructor_name (unqualified_id);
8251 case IDENTIFIER_NODE:
8252 case TEMPLATE_ID_EXPR:
8260 /* Determine the type of the entity declared by recurring on the
8262 for (; declarator; declarator = declarator->declarator)
8264 const cp_declarator *inner_declarator;
8267 if (type == error_mark_node)
8268 return error_mark_node;
8270 attrs = declarator->attributes;
8276 if (declarator == NULL || declarator->kind == cdk_id)
8277 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8278 if (declarator->kind == cdk_function)
8279 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8280 if (declarator->kind == cdk_array)
8281 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8282 returned_attrs = decl_attributes (&type,
8283 chainon (returned_attrs, attrs),
8287 if (declarator->kind == cdk_id)
8290 inner_declarator = declarator->declarator;
8292 switch (declarator->kind)
8295 type = create_array_type_for_decl (dname, type,
8296 declarator->u.array.bounds);
8304 /* Declaring a function type.
8305 Make sure we have a valid type for the function to return. */
8307 if (type_quals != TYPE_UNQUALIFIED)
8309 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8310 warning (OPT_Wignored_qualifiers,
8311 "type qualifiers ignored on function return type");
8312 /* We now know that the TYPE_QUALS don't apply to the
8313 decl, but to its return type. */
8314 type_quals = TYPE_UNQUALIFIED;
8315 set_no_warning = true;
8317 errmsg = targetm.invalid_return_type (type);
8321 type = integer_type_node;
8324 /* Error about some types functions can't return. */
8326 if (TREE_CODE (type) == FUNCTION_TYPE)
8328 error ("%qs declared as function returning a function", name);
8329 return error_mark_node;
8331 if (TREE_CODE (type) == ARRAY_TYPE)
8333 error ("%qs declared as function returning an array", name);
8334 return error_mark_node;
8337 /* Pick up type qualifiers which should be applied to `this'. */
8338 memfn_quals = declarator->u.function.qualifiers;
8340 /* Pick up the exception specifications. */
8341 raises = declarator->u.function.exception_specification;
8343 /* Say it's a definition only for the CALL_EXPR
8344 closest to the identifier. */
8345 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8347 /* Handle a late-specified return type. */
8350 if (type_uses_auto (type))
8352 if (!declarator->u.function.late_return_type)
8354 error ("%qs function uses %<auto%> type specifier without"
8355 " late return type", name);
8356 return error_mark_node;
8358 else if (!is_auto (type))
8360 error ("%qs function with late return type has"
8361 " %qT as its type rather than plain %<auto%>",
8363 return error_mark_node;
8366 else if (declarator->u.function.late_return_type)
8368 error ("%qs function with late return type not declared"
8369 " with %<auto%> type specifier", name);
8370 return error_mark_node;
8373 type = splice_late_return_type
8374 (type, declarator->u.function.late_return_type);
8375 if (type == error_mark_node)
8376 return error_mark_node;
8378 if (ctype == NULL_TREE
8379 && decl_context == FIELD
8381 && (friendp == 0 || dname == current_class_name))
8382 ctype = current_class_type;
8384 if (ctype && (sfk == sfk_constructor
8385 || sfk == sfk_destructor))
8387 /* We are within a class's scope. If our declarator name
8388 is the same as the class name, and we are defining
8389 a function, then it is a constructor/destructor, and
8390 therefore returns a void type. */
8392 /* ISO C++ 12.4/2. A destructor may not be declared
8393 const or volatile. A destructor may not be
8396 ISO C++ 12.1. A constructor may not be declared
8397 const or volatile. A constructor may not be
8398 virtual. A constructor may not be static. */
8400 error ((flags == DTOR_FLAG)
8401 ? "destructor cannot be static member function"
8402 : "constructor cannot be static member function");
8405 error ((flags == DTOR_FLAG)
8406 ? "destructors may not be cv-qualified"
8407 : "constructors may not be cv-qualified");
8408 memfn_quals = TYPE_UNQUALIFIED;
8411 if (decl_context == FIELD
8412 && !member_function_or_else (ctype,
8415 return error_mark_node;
8417 if (flags != DTOR_FLAG)
8419 /* It's a constructor. */
8424 permerror (input_location, "constructors cannot be declared virtual");
8427 if (decl_context == FIELD
8428 && sfk != sfk_constructor)
8429 return error_mark_node;
8431 if (decl_context == FIELD)
8437 error ("can't initialize friend function %qs", name);
8440 /* Cannot be both friend and virtual. */
8441 error ("virtual functions cannot be friends");
8444 if (decl_context == NORMAL)
8445 error ("friend declaration not in class definition");
8446 if (current_function_decl && funcdef_flag)
8447 error ("can't define friend function %qs in a local "
8451 else if (ctype && sfk == sfk_conversion)
8455 maybe_warn_cpp0x ("explicit conversion operators");
8460 arg_types = grokparms (declarator->u.function.parameters,
8463 if (inner_declarator
8464 && inner_declarator->kind == cdk_id
8465 && inner_declarator->u.id.sfk == sfk_destructor
8466 && arg_types != void_list_node)
8468 error ("destructors may not have parameters");
8469 arg_types = void_list_node;
8473 type = build_function_type (type, arg_types);
8480 /* Filter out pointers-to-references and references-to-references.
8481 We can get these if a TYPE_DECL is used. */
8483 if (TREE_CODE (type) == REFERENCE_TYPE)
8485 if (declarator->kind != cdk_reference)
8487 error ("cannot declare pointer to %q#T", type);
8488 type = TREE_TYPE (type);
8491 /* In C++0x, we allow reference to reference declarations
8492 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8493 and template type arguments [14.3.1/4 temp.arg.type]. The
8494 check for direct reference to reference declarations, which
8495 are still forbidden, occurs below. Reasoning behind the change
8496 can be found in DR106, DR540, and the rvalue reference
8498 else if (cxx_dialect == cxx98)
8500 error ("cannot declare reference to %q#T", type);
8501 type = TREE_TYPE (type);
8504 else if (VOID_TYPE_P (type))
8506 if (declarator->kind == cdk_reference)
8507 error ("cannot declare reference to %q#T", type);
8508 else if (declarator->kind == cdk_ptrmem)
8509 error ("cannot declare pointer to %q#T member", type);
8512 /* We now know that the TYPE_QUALS don't apply to the decl,
8513 but to the target of the pointer. */
8514 type_quals = TYPE_UNQUALIFIED;
8516 if (declarator->kind == cdk_ptrmem
8517 && (TREE_CODE (type) == FUNCTION_TYPE
8518 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8520 memfn_quals |= cp_type_quals (type);
8521 type = build_memfn_type (type,
8522 declarator->u.pointer.class_type,
8524 memfn_quals = TYPE_UNQUALIFIED;
8527 if (TREE_CODE (type) == FUNCTION_TYPE
8528 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8529 error ("cannot declare %s to qualified function type %qT",
8530 declarator->kind == cdk_reference ? "reference" : "pointer",
8533 if (declarator->kind == cdk_reference)
8535 /* In C++0x, the type we are creating a reference to might be
8536 a typedef which is itself a reference type. In that case,
8537 we follow the reference collapsing rules in
8538 [7.1.3/8 dcl.typedef] to create the final reference type:
8540 "If a typedef TD names a type that is a reference to a type
8541 T, an attempt to create the type 'lvalue reference to cv TD'
8542 creates the type 'lvalue reference to T,' while an attempt
8543 to create the type "rvalue reference to cv TD' creates the
8546 if (!VOID_TYPE_P (type))
8547 type = cp_build_reference_type
8548 ((TREE_CODE (type) == REFERENCE_TYPE
8549 ? TREE_TYPE (type) : type),
8550 (declarator->u.reference.rvalue_ref
8551 && (TREE_CODE(type) != REFERENCE_TYPE
8552 || TYPE_REF_IS_RVALUE (type))));
8554 /* In C++0x, we need this check for direct reference to
8555 reference declarations, which are forbidden by
8556 [8.3.2/5 dcl.ref]. Reference to reference declarations
8557 are only allowed indirectly through typedefs and template
8558 type arguments. Example:
8560 void foo(int & &); // invalid ref-to-ref decl
8562 typedef int & int_ref;
8563 void foo(int_ref &); // valid ref-to-ref decl
8565 if (inner_declarator && inner_declarator->kind == cdk_reference)
8566 error ("cannot declare reference to %q#T, which is not "
8567 "a typedef or a template type argument", type);
8569 else if (TREE_CODE (type) == METHOD_TYPE)
8570 type = build_ptrmemfunc_type (build_pointer_type (type));
8571 else if (declarator->kind == cdk_ptrmem)
8573 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8575 if (declarator->u.pointer.class_type == error_mark_node)
8576 /* We will already have complained. */
8577 type = error_mark_node;
8579 type = build_ptrmem_type (declarator->u.pointer.class_type,
8583 type = build_pointer_type (type);
8585 /* Process a list of type modifier keywords (such as
8586 const or volatile) that were given inside the `*' or `&'. */
8588 if (declarator->u.pointer.qualifiers)
8591 = cp_build_qualified_type (type,
8592 declarator->u.pointer.qualifiers);
8593 type_quals = cp_type_quals (type);
8606 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8607 && TREE_CODE (type) != FUNCTION_TYPE
8608 && TREE_CODE (type) != METHOD_TYPE)
8610 error ("template-id %qD used as a declarator",
8612 unqualified_id = dname;
8615 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8616 qualified with a class-name, turn it into a METHOD_TYPE, unless
8617 we know that the function is static. We take advantage of this
8618 opportunity to do other processing that pertains to entities
8619 explicitly declared to be class members. Note that if DECLARATOR
8620 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8621 would not have exited the loop above. */
8623 && declarator->u.id.qualifying_scope
8624 && TYPE_P (declarator->u.id.qualifying_scope))
8628 ctype = declarator->u.id.qualifying_scope;
8629 ctype = TYPE_MAIN_VARIANT (ctype);
8631 while (t != NULL_TREE && CLASS_TYPE_P (t))
8633 /* You're supposed to have one `template <...>' for every
8634 template class, but you don't need one for a full
8635 specialization. For example:
8637 template <class T> struct S{};
8638 template <> struct S<int> { void f(); };
8639 void S<int>::f () {}
8641 is correct; there shouldn't be a `template <>' for the
8642 definition of `S<int>::f'. */
8643 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8644 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8645 /* T is an explicit (not partial) specialization. All
8646 containing classes must therefore also be explicitly
8649 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8650 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8651 template_count += 1;
8653 t = TYPE_MAIN_DECL (t);
8654 t = DECL_CONTEXT (t);
8657 if (ctype == current_class_type)
8661 permerror (input_location, "member functions are implicitly friends of their class");
8665 permerror (declarator->id_loc,
8666 "extra qualification %<%T::%> on member %qs",
8669 else if (/* If the qualifying type is already complete, then we
8670 can skip the following checks. */
8671 !COMPLETE_TYPE_P (ctype)
8672 && (/* If the function is being defined, then
8673 qualifying type must certainly be complete. */
8675 /* A friend declaration of "T::f" is OK, even if
8676 "T" is a template parameter. But, if this
8677 function is not a friend, the qualifying type
8679 || (!friendp && !CLASS_TYPE_P (ctype))
8680 /* For a declaration, the type need not be
8681 complete, if either it is dependent (since there
8682 is no meaningful definition of complete in that
8683 case) or the qualifying class is currently being
8685 || !(dependent_type_p (ctype)
8686 || currently_open_class (ctype)))
8687 /* Check that the qualifying type is complete. */
8688 && !complete_type_or_else (ctype, NULL_TREE))
8689 return error_mark_node;
8690 else if (TREE_CODE (type) == FUNCTION_TYPE)
8692 tree sname = declarator->u.id.unqualified_name;
8694 if (current_class_type
8695 && (!friendp || funcdef_flag))
8698 ? "cannot define member function %<%T::%s%> within %<%T%>"
8699 : "cannot declare member function %<%T::%s%> within %<%T%>",
8700 ctype, name, current_class_type);
8701 return error_mark_node;
8704 if (TREE_CODE (sname) == IDENTIFIER_NODE
8705 && NEW_DELETE_OPNAME_P (sname))
8706 /* Overloaded operator new and operator delete
8707 are always static functions. */
8710 type = build_memfn_type (type, ctype, memfn_quals);
8712 else if (declspecs->specs[(int)ds_typedef]
8713 && current_class_type)
8715 error ("cannot declare member %<%T::%s%> within %qT",
8716 ctype, name, current_class_type);
8717 return error_mark_node;
8721 /* Now TYPE has the actual type. */
8726 *attrlist = chainon (returned_attrs, *attrlist);
8728 attrlist = &returned_attrs;
8731 /* Handle parameter packs. */
8732 if (parameter_pack_p)
8734 if (decl_context == PARM)
8735 /* Turn the type into a pack expansion.*/
8736 type = make_pack_expansion (type);
8738 error ("non-parameter %qs cannot be a parameter pack", name);
8741 /* Did array size calculations overflow? */
8743 if (TREE_CODE (type) == ARRAY_TYPE
8744 && COMPLETE_TYPE_P (type)
8745 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8746 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8748 error ("size of array %qs is too large", name);
8749 /* If we proceed with the array type as it is, we'll eventually
8750 crash in tree_low_cst(). */
8751 type = error_mark_node;
8754 if ((decl_context == FIELD || decl_context == PARM)
8755 && !processing_template_decl
8756 && variably_modified_type_p (type, NULL_TREE))
8758 if (decl_context == FIELD)
8759 error ("data member may not have variably modified type %qT", type);
8761 error ("parameter may not have variably modified type %qT", type);
8762 type = error_mark_node;
8765 if (explicitp == 1 || (explicitp && friendp))
8767 /* [dcl.fct.spec] The explicit specifier shall only be used in
8768 declarations of constructors within a class definition. */
8769 error ("only declarations of constructors can be %<explicit%>");
8773 if (storage_class == sc_mutable)
8775 if (decl_context != FIELD || friendp)
8777 error ("non-member %qs cannot be declared %<mutable%>", name);
8778 storage_class = sc_none;
8780 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8782 error ("non-object member %qs cannot be declared %<mutable%>", name);
8783 storage_class = sc_none;
8785 else if (TREE_CODE (type) == FUNCTION_TYPE
8786 || TREE_CODE (type) == METHOD_TYPE)
8788 error ("function %qs cannot be declared %<mutable%>", name);
8789 storage_class = sc_none;
8793 error ("static %qs cannot be declared %<mutable%>", name);
8794 storage_class = sc_none;
8796 else if (type_quals & TYPE_QUAL_CONST)
8798 error ("const %qs cannot be declared %<mutable%>", name);
8799 storage_class = sc_none;
8803 /* If this is declaring a typedef name, return a TYPE_DECL. */
8804 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8808 /* Note that the grammar rejects storage classes
8809 in typenames, fields or parameters. */
8810 if (current_lang_name == lang_name_java)
8811 TYPE_FOR_JAVA (type) = 1;
8813 /* This declaration:
8815 typedef void f(int) const;
8817 declares a function type which is not a member of any
8818 particular class, but which is cv-qualified; for
8819 example "f S::*" declares a pointer to a const-qualified
8820 member function of S. We record the cv-qualification in the
8822 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8824 type = cp_build_qualified_type (type, memfn_quals);
8826 /* We have now dealt with these qualifiers. */
8827 memfn_quals = TYPE_UNQUALIFIED;
8830 if (decl_context == FIELD)
8831 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8833 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8834 if (id_declarator && declarator->u.id.qualifying_scope) {
8835 error_at (DECL_SOURCE_LOCATION (decl),
8836 "typedef name may not be a nested-name-specifier");
8837 TREE_TYPE (decl) = error_mark_node;
8840 if (decl_context != FIELD)
8842 if (!current_function_decl)
8843 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8844 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8845 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8846 (current_function_decl)))
8847 /* The TYPE_DECL is "abstract" because there will be
8848 clones of this constructor/destructor, and there will
8849 be copies of this TYPE_DECL generated in those
8851 DECL_ABSTRACT (decl) = 1;
8853 else if (constructor_name_p (unqualified_id, current_class_type))
8854 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8855 "as enclosing class",
8858 /* If the user declares "typedef struct {...} foo" then the
8859 struct will have an anonymous name. Fill that name in now.
8860 Nothing can refer to it, so nothing needs know about the name
8862 if (type != error_mark_node
8865 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8866 && TYPE_ANONYMOUS_P (type)
8867 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8871 /* Replace the anonymous name with the real name everywhere. */
8872 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8874 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8876 debug_hooks->set_name (t, decl);
8877 TYPE_NAME (t) = decl;
8881 if (TYPE_LANG_SPECIFIC (type))
8882 TYPE_WAS_ANONYMOUS (type) = 1;
8884 /* If this is a typedef within a template class, the nested
8885 type is a (non-primary) template. The name for the
8886 template needs updating as well. */
8887 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8888 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8889 = TYPE_IDENTIFIER (type);
8891 /* FIXME remangle member functions; member functions of a
8892 type with external linkage have external linkage. */
8896 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8897 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8899 bad_specifiers (decl, "type", virtualp,
8900 memfn_quals != TYPE_UNQUALIFIED,
8901 inlinep, friendp, raises != NULL_TREE);
8906 /* Detect the case of an array type of unspecified size
8907 which came, as such, direct from a typedef name.
8908 We must copy the type, so that the array's domain can be
8909 individually set by the object's initializer. */
8911 if (type && typedef_type
8912 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8913 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8914 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8916 /* Detect where we're using a typedef of function type to declare a
8917 function. PARMS will not be set, so we must create it now. */
8919 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8921 tree decls = NULL_TREE;
8924 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8926 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8928 TREE_CHAIN (decl) = decls;
8932 parms = nreverse (decls);
8934 if (decl_context != TYPENAME)
8936 /* A cv-qualifier-seq shall only be part of the function type
8937 for a non-static member function. [8.3.5/4 dcl.fct] */
8938 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8939 && (current_class_type == NULL_TREE || staticp) )
8942 ? G_("qualified function types cannot be used to "
8943 "declare static member functions")
8944 : G_("qualified function types cannot be used to "
8945 "declare free functions"));
8946 type = TYPE_MAIN_VARIANT (type);
8949 /* The qualifiers on the function type become the qualifiers on
8950 the non-static member function. */
8951 memfn_quals |= cp_type_quals (type);
8955 /* If this is a type name (such as, in a cast or sizeof),
8956 compute the type and return it now. */
8958 if (decl_context == TYPENAME)
8960 /* Note that the grammar rejects storage classes
8961 in typenames, fields or parameters. */
8962 if (type_quals != TYPE_UNQUALIFIED)
8963 type_quals = TYPE_UNQUALIFIED;
8965 /* Special case: "friend class foo" looks like a TYPENAME context. */
8968 if (type_quals != TYPE_UNQUALIFIED)
8970 error ("type qualifiers specified for friend class declaration");
8971 type_quals = TYPE_UNQUALIFIED;
8975 error ("%<inline%> specified for friend class declaration");
8981 /* Don't allow friend declaration without a class-key. */
8982 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8983 permerror (input_location, "template parameters cannot be friends");
8984 else if (TREE_CODE (type) == TYPENAME_TYPE)
8985 permerror (input_location, "friend declaration requires class-key, "
8986 "i.e. %<friend class %T::%D%>",
8987 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8989 permerror (input_location, "friend declaration requires class-key, "
8990 "i.e. %<friend %#T%>",
8994 /* Only try to do this stuff if we didn't already give up. */
8995 if (type != integer_type_node)
8997 /* A friendly class? */
8998 if (current_class_type)
8999 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9002 error ("trying to make class %qT a friend of global scope",
9005 type = void_type_node;
9008 else if (memfn_quals)
9010 if (ctype == NULL_TREE
9011 && TREE_CODE (type) == METHOD_TYPE)
9012 ctype = TYPE_METHOD_BASETYPE (type);
9015 type = build_memfn_type (type, ctype, memfn_quals);
9016 /* Core issue #547: need to allow this in template type args. */
9017 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9018 type = cp_build_qualified_type (type, memfn_quals);
9020 error ("invalid qualifiers on non-member function type");
9025 else if (unqualified_id == NULL_TREE && decl_context != PARM
9026 && decl_context != CATCHPARM
9027 && TREE_CODE (type) != UNION_TYPE
9030 error ("abstract declarator %qT used as declaration", type);
9031 return error_mark_node;
9034 /* Only functions may be declared using an operator-function-id. */
9036 && IDENTIFIER_OPNAME_P (unqualified_id)
9037 && TREE_CODE (type) != FUNCTION_TYPE
9038 && TREE_CODE (type) != METHOD_TYPE)
9040 error ("declaration of %qD as non-function", unqualified_id);
9041 return error_mark_node;
9044 /* We don't check parameter types here because we can emit a better
9045 error message later. */
9046 if (decl_context != PARM)
9048 type = check_var_type (unqualified_id, type);
9049 if (type == error_mark_node)
9050 return error_mark_node;
9053 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9054 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9056 if (decl_context == PARM || decl_context == CATCHPARM)
9058 if (ctype || in_namespace)
9059 error ("cannot use %<::%> in parameter declaration");
9061 /* A parameter declared as an array of T is really a pointer to T.
9062 One declared as a function is really a pointer to a function.
9063 One declared as a member is really a pointer to member. */
9065 if (TREE_CODE (type) == ARRAY_TYPE)
9067 /* Transfer const-ness of array into that of type pointed to. */
9068 type = build_pointer_type (TREE_TYPE (type));
9069 type_quals = TYPE_UNQUALIFIED;
9071 else if (TREE_CODE (type) == FUNCTION_TYPE)
9072 type = build_pointer_type (type);
9078 if (decl_context == PARM)
9080 decl = cp_build_parm_decl (unqualified_id, type);
9082 bad_specifiers (decl, "parameter", virtualp,
9083 memfn_quals != TYPE_UNQUALIFIED,
9084 inlinep, friendp, raises != NULL_TREE);
9086 else if (decl_context == FIELD)
9088 /* The C99 flexible array extension. */
9089 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9090 && TYPE_DOMAIN (type) == NULL_TREE)
9092 tree itype = compute_array_index_type (dname, integer_zero_node);
9093 type = build_cplus_array_type (TREE_TYPE (type), itype);
9096 if (type == error_mark_node)
9098 /* Happens when declaring arrays of sizes which
9099 are error_mark_node, for example. */
9102 else if (in_namespace && !friendp)
9104 /* Something like struct S { int N::j; }; */
9105 error ("invalid use of %<::%>");
9106 return error_mark_node;
9108 else if (TREE_CODE (type) == FUNCTION_TYPE)
9111 tree function_context;
9115 if (ctype == NULL_TREE)
9116 ctype = current_class_type;
9118 if (ctype == NULL_TREE)
9120 error ("can't make %qD into a method -- not in a class",
9122 return error_mark_node;
9125 /* ``A union may [ ... ] not [ have ] virtual functions.''
9127 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9129 error ("function %qD declared virtual inside a union",
9131 return error_mark_node;
9134 if (NEW_DELETE_OPNAME_P (unqualified_id))
9138 error ("%qD cannot be declared virtual, since it "
9144 else if (staticp < 2)
9145 type = build_memfn_type (type, ctype, memfn_quals);
9148 /* Check that the name used for a destructor makes sense. */
9149 if (sfk == sfk_destructor)
9151 tree uqname = id_declarator->u.id.unqualified_name;
9155 gcc_assert (friendp);
9156 error ("expected qualified name in friend declaration "
9157 "for destructor %qD", uqname);
9158 return error_mark_node;
9161 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9163 error ("declaration of %qD as member of %qT",
9165 return error_mark_node;
9168 else if (sfk == sfk_constructor && friendp)
9170 error ("expected qualified name in friend declaration "
9171 "for constructor %qD",
9172 id_declarator->u.id.unqualified_name);
9173 return error_mark_node;
9176 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9177 function_context = (ctype != NULL_TREE) ?
9178 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9179 publicp = (! friendp || ! staticp)
9180 && function_context == NULL_TREE;
9181 decl = grokfndecl (ctype, type,
9182 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9183 ? unqualified_id : dname,
9186 virtualp, flags, memfn_quals, raises,
9187 friendp ? -1 : 0, friendp, publicp, inlinep,
9189 funcdef_flag, template_count, in_namespace,
9190 attrlist, declarator->id_loc);
9191 if (decl == NULL_TREE)
9192 return error_mark_node;
9194 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9195 /* The decl and setting of decl_attr is also turned off. */
9196 decl = build_decl_attribute_variant (decl, decl_attr);
9199 /* [class.conv.ctor]
9201 A constructor declared without the function-specifier
9202 explicit that can be called with a single parameter
9203 specifies a conversion from the type of its first
9204 parameter to the type of its class. Such a constructor
9205 is called a converting constructor. */
9207 DECL_NONCONVERTING_P (decl) = 1;
9209 else if (TREE_CODE (type) == METHOD_TYPE)
9211 /* We only get here for friend declarations of
9212 members of other classes. */
9213 /* All method decls are public, so tell grokfndecl to set
9214 TREE_PUBLIC, also. */
9215 decl = grokfndecl (ctype, type,
9216 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9217 ? unqualified_id : dname,
9220 virtualp, flags, memfn_quals, raises,
9221 friendp ? -1 : 0, friendp, 1, 0, sfk,
9222 funcdef_flag, template_count, in_namespace,
9224 declarator->id_loc);
9225 if (decl == NULL_TREE)
9226 return error_mark_node;
9228 else if (!staticp && !dependent_type_p (type)
9229 && !COMPLETE_TYPE_P (complete_type (type))
9230 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9233 error ("field %qD has incomplete type", unqualified_id);
9235 error ("name %qT has incomplete type", type);
9237 /* If we're instantiating a template, tell them which
9238 instantiation made the field's type be incomplete. */
9239 if (current_class_type
9240 && TYPE_NAME (current_class_type)
9241 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9243 && declspecs->type == type)
9244 error (" in instantiation of template %qT",
9245 current_class_type);
9247 return error_mark_node;
9253 error ("%qE is neither function nor member function; "
9254 "cannot be declared friend", unqualified_id);
9262 /* Friends are treated specially. */
9263 if (ctype == current_class_type)
9264 ; /* We already issued a permerror. */
9265 else if (decl && DECL_NAME (decl))
9267 if (template_class_depth (current_class_type) == 0)
9269 decl = check_explicit_specialization
9270 (unqualified_id, decl, template_count,
9271 2 * funcdef_flag + 4);
9272 if (decl == error_mark_node)
9273 return error_mark_node;
9276 decl = do_friend (ctype, unqualified_id, decl,
9282 return error_mark_node;
9285 /* Structure field. It may not be a function, except for C++. */
9287 if (decl == NULL_TREE)
9293 /* An attempt is being made to initialize a non-static
9294 member. But, from [class.mem]:
9296 4 A member-declarator can contain a
9297 constant-initializer only if it declares a static
9298 member (_class.static_) of integral or enumeration
9299 type, see _class.static.data_.
9301 This used to be relatively common practice, but
9302 the rest of the compiler does not correctly
9303 handle the initialization unless the member is
9304 static so we make it static below. */
9305 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9307 permerror (input_location, "making %qD static", unqualified_id);
9311 if (uses_template_parms (type))
9312 /* We'll check at instantiation time. */
9314 else if (check_static_variable_definition (unqualified_id,
9316 /* If we just return the declaration, crashes
9317 will sometimes occur. We therefore return
9318 void_type_node, as if this was a friend
9319 declaration, to cause callers to completely
9320 ignore this declaration. */
9321 return error_mark_node;
9326 /* C++ allows static class members. All other work
9327 for this is done by grokfield. */
9328 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9329 set_linkage_for_static_data_member (decl);
9330 /* Even if there is an in-class initialization, DECL
9331 is considered undefined until an out-of-class
9332 definition is provided. */
9333 DECL_EXTERNAL (decl) = 1;
9336 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9340 decl = build_decl (input_location,
9341 FIELD_DECL, unqualified_id, type);
9342 DECL_NONADDRESSABLE_P (decl) = bitfield;
9343 if (bitfield && !unqualified_id)
9344 TREE_NO_WARNING (decl) = 1;
9346 if (storage_class == sc_mutable)
9348 DECL_MUTABLE_P (decl) = 1;
9349 storage_class = sc_none;
9353 bad_specifiers (decl, "field", virtualp,
9354 memfn_quals != TYPE_UNQUALIFIED,
9355 inlinep, friendp, raises != NULL_TREE);
9358 else if (TREE_CODE (type) == FUNCTION_TYPE
9359 || TREE_CODE (type) == METHOD_TYPE)
9364 if (!unqualified_id)
9365 return error_mark_node;
9367 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9368 original_name = dname;
9370 original_name = unqualified_id;
9372 if (storage_class == sc_auto)
9373 error ("storage class %<auto%> invalid for function %qs", name);
9374 else if (storage_class == sc_register)
9375 error ("storage class %<register%> invalid for function %qs", name);
9377 error ("storage class %<__thread%> invalid for function %qs", name);
9379 /* Function declaration not at top level.
9380 Storage classes other than `extern' are not allowed
9381 and `extern' makes no difference. */
9382 if (! toplevel_bindings_p ()
9383 && (storage_class == sc_static
9384 || declspecs->specs[(int)ds_inline])
9387 if (storage_class == sc_static)
9388 pedwarn (input_location, OPT_pedantic,
9389 "%<static%> specified invalid for function %qs "
9390 "declared out of global scope", name);
9392 pedwarn (input_location, OPT_pedantic,
9393 "%<inline%> specifier invalid for function %qs "
9394 "declared out of global scope", name);
9397 if (ctype != NULL_TREE
9398 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9400 error ("%q#T is not a class or a namespace", ctype);
9404 if (ctype == NULL_TREE)
9408 error ("virtual non-class function %qs", name);
9411 else if (sfk == sfk_constructor
9412 || sfk == sfk_destructor)
9415 ? "%qs defined in a non-class scope"
9416 : "%qs declared in a non-class scope", name);
9420 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9421 && !NEW_DELETE_OPNAME_P (original_name))
9422 type = build_method_type_directly (ctype,
9424 TYPE_ARG_TYPES (type));
9426 /* Record presence of `static'. */
9427 publicp = (ctype != NULL_TREE
9428 || storage_class == sc_extern
9429 || storage_class != sc_static);
9431 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9432 virtualp, flags, memfn_quals, raises,
9434 publicp, inlinep, sfk, funcdef_flag,
9435 template_count, in_namespace, attrlist,
9436 declarator->id_loc);
9437 if (decl == NULL_TREE)
9438 return error_mark_node;
9442 int invalid_static = 0;
9444 /* Don't allow a static member function in a class, and forbid
9445 declaring main to be static. */
9446 if (TREE_CODE (type) == METHOD_TYPE)
9448 permerror (input_location, "cannot declare member function %qD to have "
9449 "static linkage", decl);
9452 else if (current_function_decl)
9454 /* FIXME need arm citation */
9455 error ("cannot declare static function inside another function");
9462 storage_class = sc_none;
9468 /* It's a variable. */
9470 /* An uninitialized decl with `extern' is a reference. */
9471 decl = grokvardecl (type, unqualified_id,
9474 (type_quals & TYPE_QUAL_CONST) != 0,
9475 ctype ? ctype : in_namespace);
9476 bad_specifiers (decl, "variable", virtualp,
9477 memfn_quals != TYPE_UNQUALIFIED,
9478 inlinep, friendp, raises != NULL_TREE);
9482 DECL_CONTEXT (decl) = ctype;
9485 permerror (input_location, "%<static%> may not be used when defining "
9486 "(as opposed to declaring) a static data member");
9488 storage_class = sc_none;
9490 if (storage_class == sc_register && TREE_STATIC (decl))
9492 error ("static member %qD declared %<register%>", decl);
9493 storage_class = sc_none;
9495 if (storage_class == sc_extern && pedantic)
9497 pedwarn (input_location, OPT_pedantic,
9498 "cannot explicitly declare member %q#D to have "
9499 "extern linkage", decl);
9500 storage_class = sc_none;
9505 if (storage_class == sc_extern && initialized && !funcdef_flag)
9507 if (toplevel_bindings_p ())
9509 /* It's common practice (and completely valid) to have a const
9510 be initialized and declared extern. */
9511 if (!(type_quals & TYPE_QUAL_CONST))
9512 warning (0, "%qs initialized and declared %<extern%>", name);
9516 error ("%qs has both %<extern%> and initializer", name);
9517 return error_mark_node;
9521 /* Record `register' declaration for warnings on &
9522 and in case doing stupid register allocation. */
9524 if (storage_class == sc_register)
9525 DECL_REGISTER (decl) = 1;
9526 else if (storage_class == sc_extern)
9527 DECL_THIS_EXTERN (decl) = 1;
9528 else if (storage_class == sc_static)
9529 DECL_THIS_STATIC (decl) = 1;
9531 /* Record constancy and volatility on the DECL itself . There's
9532 no need to do this when processing a template; we'll do this
9533 for the instantiated declaration based on the type of DECL. */
9534 if (!processing_template_decl)
9535 cp_apply_type_quals_to_decl (type_quals, decl);
9538 TREE_NO_WARNING (decl) = 1;
9544 /* Subroutine of start_function. Ensure that each of the parameter
9545 types (as listed in PARMS) is complete, as is required for a
9546 function definition. */
9549 require_complete_types_for_parms (tree parms)
9551 for (; parms; parms = TREE_CHAIN (parms))
9553 if (dependent_type_p (TREE_TYPE (parms)))
9555 if (!VOID_TYPE_P (TREE_TYPE (parms))
9556 && complete_type_or_else (TREE_TYPE (parms), parms))
9558 relayout_decl (parms);
9559 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9562 /* grokparms or complete_type_or_else will have already issued
9564 TREE_TYPE (parms) = error_mark_node;
9568 /* Returns nonzero if T is a local variable. */
9571 local_variable_p (const_tree t)
9573 if ((TREE_CODE (t) == VAR_DECL
9574 /* A VAR_DECL with a context that is a _TYPE is a static data
9576 && !TYPE_P (CP_DECL_CONTEXT (t))
9577 /* Any other non-local variable must be at namespace scope. */
9578 && !DECL_NAMESPACE_SCOPE_P (t))
9579 || (TREE_CODE (t) == PARM_DECL))
9585 /* Like local_variable_p, but suitable for use as a tree-walking
9589 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9590 void *data ATTRIBUTE_UNUSED)
9592 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9594 else if (TYPE_P (*tp))
9601 /* Check that ARG, which is a default-argument expression for a
9602 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9603 something goes wrong. DECL may also be a _TYPE node, rather than a
9604 DECL, if there is no DECL available. */
9607 check_default_argument (tree decl, tree arg)
9612 if (TREE_CODE (arg) == DEFAULT_ARG)
9613 /* We get a DEFAULT_ARG when looking at an in-class declaration
9614 with a default argument. Ignore the argument for now; we'll
9615 deal with it after the class is complete. */
9624 decl_type = TREE_TYPE (decl);
9626 if (arg == error_mark_node
9627 || decl == error_mark_node
9628 || TREE_TYPE (arg) == error_mark_node
9629 || decl_type == error_mark_node)
9630 /* Something already went wrong. There's no need to check
9632 return error_mark_node;
9634 /* [dcl.fct.default]
9636 A default argument expression is implicitly converted to the
9638 if (!TREE_TYPE (arg)
9639 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9642 error ("default argument for %q#D has type %qT",
9643 decl, TREE_TYPE (arg));
9645 error ("default argument for parameter of type %qT has type %qT",
9646 decl_type, TREE_TYPE (arg));
9648 return error_mark_node;
9651 /* [dcl.fct.default]
9653 Local variables shall not be used in default argument
9656 The keyword `this' shall not be used in a default argument of a
9658 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9661 error ("default argument %qE uses local variable %qD", arg, var);
9662 return error_mark_node;
9669 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9672 type_is_deprecated (tree type)
9674 enum tree_code code;
9675 if (TREE_DEPRECATED (type))
9677 if (TYPE_NAME (type)
9678 && TREE_DEPRECATED (TYPE_NAME (type)))
9681 code = TREE_CODE (type);
9683 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9684 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9685 || code == METHOD_TYPE || code == ARRAY_TYPE)
9686 return type_is_deprecated (TREE_TYPE (type));
9688 if (TYPE_PTRMEMFUNC_P (type))
9689 return type_is_deprecated
9690 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9695 /* Decode the list of parameter types for a function type.
9696 Given the list of things declared inside the parens,
9697 return a list of types.
9699 If this parameter does not end with an ellipsis, we append
9702 *PARMS is set to the chain of PARM_DECLs created. */
9705 grokparms (tree parmlist, tree *parms)
9707 tree result = NULL_TREE;
9708 tree decls = NULL_TREE;
9712 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9714 tree type = NULL_TREE;
9715 tree init = TREE_PURPOSE (parm);
9716 tree decl = TREE_VALUE (parm);
9719 if (parm == void_list_node)
9722 if (! decl || TREE_TYPE (decl) == error_mark_node)
9725 type = TREE_TYPE (decl);
9726 if (VOID_TYPE_P (type))
9728 if (same_type_p (type, void_type_node)
9729 && DECL_SELF_REFERENCE_P (type)
9730 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9731 /* this is a parmlist of `(void)', which is ok. */
9733 cxx_incomplete_type_error (decl, type);
9734 /* It's not a good idea to actually create parameters of
9735 type `void'; other parts of the compiler assume that a
9736 void type terminates the parameter list. */
9737 type = error_mark_node;
9738 TREE_TYPE (decl) = error_mark_node;
9741 if (type != error_mark_node
9742 && TYPE_FOR_JAVA (type)
9743 && MAYBE_CLASS_TYPE_P (type))
9745 error ("parameter %qD has Java class type", decl);
9746 type = error_mark_node;
9747 TREE_TYPE (decl) = error_mark_node;
9751 if (type != error_mark_node
9752 && (errmsg = targetm.invalid_parameter_type (type)))
9755 type = error_mark_node;
9756 TREE_TYPE (decl) = error_mark_node;
9759 if (type != error_mark_node)
9761 if (deprecated_state != DEPRECATED_SUPPRESS)
9763 tree deptype = type_is_deprecated (type);
9765 warn_deprecated_use (deptype, NULL_TREE);
9768 /* Top-level qualifiers on the parameters are
9769 ignored for function types. */
9770 type = cp_build_qualified_type (type, 0);
9771 if (TREE_CODE (type) == METHOD_TYPE)
9773 error ("parameter %qD invalidly declared method type", decl);
9774 type = build_pointer_type (type);
9775 TREE_TYPE (decl) = type;
9777 else if (abstract_virtuals_error (decl, type))
9778 any_error = 1; /* Seems like a good idea. */
9779 else if (POINTER_TYPE_P (type))
9781 /* [dcl.fct]/6, parameter types cannot contain pointers
9782 (references) to arrays of unknown bound. */
9783 tree t = TREE_TYPE (type);
9784 int ptr = TYPE_PTR_P (type);
9790 else if (TREE_CODE (t) != ARRAY_TYPE)
9792 else if (!TYPE_DOMAIN (t))
9796 if (TREE_CODE (t) == ARRAY_TYPE)
9797 error ("parameter %qD includes %s to array of unknown "
9799 decl, ptr ? "pointer" : "reference", t);
9804 else if (init && !processing_template_decl)
9805 init = check_default_argument (decl, init);
9808 if (TREE_CODE (decl) == PARM_DECL
9809 && FUNCTION_PARAMETER_PACK_P (decl)
9810 && TREE_CHAIN (parm)
9811 && TREE_CHAIN (parm) != void_list_node)
9812 error ("parameter packs must be at the end of the parameter list");
9814 TREE_CHAIN (decl) = decls;
9816 result = tree_cons (init, type, result);
9818 decls = nreverse (decls);
9819 result = nreverse (result);
9821 result = chainon (result, void_list_node);
9828 /* D is a constructor or overloaded `operator='.
9830 Let T be the class in which D is declared. Then, this function
9833 -1 if D's is an ill-formed constructor or copy assignment operator
9834 whose first parameter is of type `T'.
9835 0 if D is not a copy constructor or copy assignment
9837 1 if D is a copy constructor or copy assignment operator whose
9838 first parameter is a reference to const qualified T.
9839 2 if D is a copy constructor or copy assignment operator whose
9840 first parameter is a reference to non-const qualified T.
9842 This function can be used as a predicate. Positive values indicate
9843 a copy constructor and nonzero values indicate a copy assignment
9847 copy_fn_p (const_tree d)
9853 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9855 if (TREE_CODE (d) == TEMPLATE_DECL
9856 || (DECL_TEMPLATE_INFO (d)
9857 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9858 /* Instantiations of template member functions are never copy
9859 functions. Note that member functions of templated classes are
9860 represented as template functions internally, and we must
9861 accept those as copy functions. */
9864 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9868 arg_type = TREE_VALUE (args);
9869 if (arg_type == error_mark_node)
9872 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9874 /* Pass by value copy assignment operator. */
9877 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9878 && !TYPE_REF_IS_RVALUE (arg_type)
9879 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9881 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9887 args = TREE_CHAIN (args);
9889 if (args && args != void_list_node && !TREE_PURPOSE (args))
9890 /* There are more non-optional args. */
9896 /* D is a constructor or overloaded `operator='.
9898 Let T be the class in which D is declared. Then, this function
9899 returns true when D is a move constructor or move assignment
9900 operator, false otherwise. */
9903 move_fn_p (const_tree d)
9907 bool result = false;
9909 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9911 if (cxx_dialect == cxx98)
9912 /* There are no move constructors if we are in C++98 mode. */
9915 if (TREE_CODE (d) == TEMPLATE_DECL
9916 || (DECL_TEMPLATE_INFO (d)
9917 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9918 /* Instantiations of template member functions are never copy
9919 functions. Note that member functions of templated classes are
9920 represented as template functions internally, and we must
9921 accept those as copy functions. */
9924 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9928 arg_type = TREE_VALUE (args);
9929 if (arg_type == error_mark_node)
9932 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9933 && TYPE_REF_IS_RVALUE (arg_type)
9934 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9938 args = TREE_CHAIN (args);
9940 if (args && args != void_list_node && !TREE_PURPOSE (args))
9941 /* There are more non-optional args. */
9947 /* Remember any special properties of member function DECL. */
9950 grok_special_member_properties (tree decl)
9954 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9957 class_type = DECL_CONTEXT (decl);
9958 if (DECL_CONSTRUCTOR_P (decl))
9960 int ctor = copy_fn_p (decl);
9962 if (!DECL_ARTIFICIAL (decl))
9963 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9969 A non-template constructor for class X is a copy
9970 constructor if its first parameter is of type X&, const
9971 X&, volatile X& or const volatile X&, and either there
9972 are no other parameters or else all other parameters have
9973 default arguments. */
9974 TYPE_HAS_INIT_REF (class_type) = 1;
9975 if (!DECL_DEFAULTED_FN (decl))
9976 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9978 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9980 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9982 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9983 if (TREE_CODE (decl) == TEMPLATE_DECL || !DECL_DEFAULTED_FN (decl))
9984 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9986 else if (is_list_ctor (decl))
9987 TYPE_HAS_LIST_CTOR (class_type) = 1;
9989 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9993 A non-template assignment operator for class X is a copy
9994 assignment operator if its parameter is of type X, X&, const
9995 X&, volatile X& or const volatile X&. */
9997 int assop = copy_fn_p (decl);
10001 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10002 if (!DECL_DEFAULTED_FN (decl))
10003 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10005 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10010 /* Check a constructor DECL has the correct form. Complains
10011 if the class has a constructor of the form X(X). */
10014 grok_ctor_properties (const_tree ctype, const_tree decl)
10016 int ctor_parm = copy_fn_p (decl);
10022 A declaration of a constructor for a class X is ill-formed if
10023 its first parameter is of type (optionally cv-qualified) X
10024 and either there are no other parameters or else all other
10025 parameters have default arguments.
10027 We *don't* complain about member template instantiations that
10028 have this form, though; they can occur as we try to decide
10029 what constructor to use during overload resolution. Since
10030 overload resolution will never prefer such a constructor to
10031 the non-template copy constructor (which is either explicitly
10032 or implicitly defined), there's no need to worry about their
10033 existence. Theoretically, they should never even be
10034 instantiated, but that's hard to forestall. */
10035 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10043 /* An operator with this code is unary, but can also be binary. */
10046 ambi_op_p (enum tree_code code)
10048 return (code == INDIRECT_REF
10049 || code == ADDR_EXPR
10050 || code == UNARY_PLUS_EXPR
10051 || code == NEGATE_EXPR
10052 || code == PREINCREMENT_EXPR
10053 || code == PREDECREMENT_EXPR);
10056 /* An operator with this name can only be unary. */
10059 unary_op_p (enum tree_code code)
10061 return (code == TRUTH_NOT_EXPR
10062 || code == BIT_NOT_EXPR
10063 || code == COMPONENT_REF
10064 || code == TYPE_EXPR);
10067 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10068 errors are issued for invalid declarations. */
10071 grok_op_properties (tree decl, bool complain)
10073 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10075 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10076 tree name = DECL_NAME (decl);
10077 enum tree_code operator_code;
10082 /* Count the number of arguments and check for ellipsis. */
10083 for (argtype = argtypes, arity = 0;
10084 argtype && argtype != void_list_node;
10085 argtype = TREE_CHAIN (argtype))
10087 ellipsis_p = !argtype;
10089 class_type = DECL_CONTEXT (decl);
10090 if (class_type && !CLASS_TYPE_P (class_type))
10091 class_type = NULL_TREE;
10093 if (DECL_CONV_FN_P (decl))
10094 operator_code = TYPE_EXPR;
10098 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10099 if (ansi_opname (CODE) == name) \
10101 operator_code = (CODE); \
10104 else if (ansi_assopname (CODE) == name) \
10106 operator_code = (CODE); \
10107 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10111 #include "operators.def"
10112 #undef DEF_OPERATOR
10114 gcc_unreachable ();
10117 gcc_assert (operator_code != MAX_TREE_CODES);
10118 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10121 switch (operator_code)
10124 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10128 TYPE_GETS_DELETE (class_type) |= 1;
10132 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10135 case VEC_DELETE_EXPR:
10136 TYPE_GETS_DELETE (class_type) |= 2;
10143 /* [basic.std.dynamic.allocation]/1:
10145 A program is ill-formed if an allocation function is declared
10146 in a namespace scope other than global scope or declared static
10149 The same also holds true for deallocation functions. */
10150 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10151 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10153 if (DECL_NAMESPACE_SCOPE_P (decl))
10155 if (CP_DECL_CONTEXT (decl) != global_namespace)
10157 error ("%qD may not be declared within a namespace", decl);
10160 else if (!TREE_PUBLIC (decl))
10162 error ("%qD may not be declared as static", decl);
10168 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10170 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10171 DECL_IS_OPERATOR_NEW (decl) = 1;
10173 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10174 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10177 /* An operator function must either be a non-static member function
10178 or have at least one parameter of a class, a reference to a class,
10179 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10180 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10182 if (operator_code == TYPE_EXPR
10183 || operator_code == CALL_EXPR
10184 || operator_code == COMPONENT_REF
10185 || operator_code == ARRAY_REF
10186 || operator_code == NOP_EXPR)
10188 error ("%qD must be a nonstatic member function", decl);
10195 if (DECL_STATIC_FUNCTION_P (decl))
10197 error ("%qD must be either a non-static member "
10198 "function or a non-member function", decl);
10202 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10204 tree arg = non_reference (TREE_VALUE (p));
10205 if (arg == error_mark_node)
10208 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10209 because these checks are performed even on
10210 template functions. */
10211 if (MAYBE_CLASS_TYPE_P (arg)
10212 || TREE_CODE (arg) == ENUMERAL_TYPE)
10216 if (!p || p == void_list_node)
10219 error ("%qD must have an argument of class or "
10220 "enumerated type", decl);
10226 /* There are no restrictions on the arguments to an overloaded
10228 if (operator_code == CALL_EXPR)
10231 /* Warn about conversion operators that will never be used. */
10232 if (IDENTIFIER_TYPENAME_P (name)
10233 && ! DECL_TEMPLATE_INFO (decl)
10235 /* Warn only declaring the function; there is no need to
10236 warn again about out-of-class definitions. */
10237 && class_type == current_class_type)
10239 tree t = TREE_TYPE (name);
10240 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10241 const char *what = 0;
10244 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10246 if (TREE_CODE (t) == VOID_TYPE)
10248 else if (class_type)
10250 if (t == class_type)
10251 what = "the same type";
10252 /* Don't force t to be complete here. */
10253 else if (MAYBE_CLASS_TYPE_P (t)
10254 && COMPLETE_TYPE_P (t)
10255 && DERIVED_FROM_P (t, class_type))
10256 what = "a base class";
10260 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10261 "conversion operator",
10262 ref ? "a reference to " : "", what);
10265 if (operator_code == COND_EXPR)
10268 error ("ISO C++ prohibits overloading operator ?:");
10271 else if (ellipsis_p)
10273 error ("%qD must not have variable number of arguments", decl);
10276 else if (ambi_op_p (operator_code))
10279 /* We pick the one-argument operator codes by default, so
10280 we don't have to change anything. */
10282 else if (arity == 2)
10284 /* If we thought this was a unary operator, we now know
10285 it to be a binary operator. */
10286 switch (operator_code)
10289 operator_code = MULT_EXPR;
10293 operator_code = BIT_AND_EXPR;
10296 case UNARY_PLUS_EXPR:
10297 operator_code = PLUS_EXPR;
10301 operator_code = MINUS_EXPR;
10304 case PREINCREMENT_EXPR:
10305 operator_code = POSTINCREMENT_EXPR;
10308 case PREDECREMENT_EXPR:
10309 operator_code = POSTDECREMENT_EXPR;
10313 gcc_unreachable ();
10316 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10318 if ((operator_code == POSTINCREMENT_EXPR
10319 || operator_code == POSTDECREMENT_EXPR)
10320 && ! processing_template_decl
10321 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10324 error ("postfix %qD must take %<int%> as its argument",
10327 error ("postfix %qD must take %<int%> as its second "
10335 error ("%qD must take either zero or one argument", decl);
10337 error ("%qD must take either one or two arguments", decl);
10341 /* More Effective C++ rule 6. */
10343 && (operator_code == POSTINCREMENT_EXPR
10344 || operator_code == POSTDECREMENT_EXPR
10345 || operator_code == PREINCREMENT_EXPR
10346 || operator_code == PREDECREMENT_EXPR))
10348 tree arg = TREE_VALUE (argtypes);
10349 tree ret = TREE_TYPE (TREE_TYPE (decl));
10350 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10351 arg = TREE_TYPE (arg);
10352 arg = TYPE_MAIN_VARIANT (arg);
10353 if (operator_code == PREINCREMENT_EXPR
10354 || operator_code == PREDECREMENT_EXPR)
10356 if (TREE_CODE (ret) != REFERENCE_TYPE
10357 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10359 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10360 build_reference_type (arg));
10364 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10365 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10369 else if (unary_op_p (operator_code))
10374 error ("%qD must take %<void%>", decl);
10376 error ("%qD must take exactly one argument", decl);
10380 else /* if (binary_op_p (operator_code)) */
10385 error ("%qD must take exactly one argument", decl);
10387 error ("%qD must take exactly two arguments", decl);
10391 /* More Effective C++ rule 7. */
10393 && (operator_code == TRUTH_ANDIF_EXPR
10394 || operator_code == TRUTH_ORIF_EXPR
10395 || operator_code == COMPOUND_EXPR))
10396 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10400 /* Effective C++ rule 23. */
10403 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10404 && (operator_code == PLUS_EXPR
10405 || operator_code == MINUS_EXPR
10406 || operator_code == TRUNC_DIV_EXPR
10407 || operator_code == MULT_EXPR
10408 || operator_code == TRUNC_MOD_EXPR)
10409 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10410 warning (OPT_Weffc__, "%qD should return by value", decl);
10412 /* [over.oper]/8 */
10413 for (; argtypes && argtypes != void_list_node;
10414 argtypes = TREE_CHAIN (argtypes))
10415 if (TREE_PURPOSE (argtypes))
10417 TREE_PURPOSE (argtypes) = NULL_TREE;
10418 if (operator_code == POSTINCREMENT_EXPR
10419 || operator_code == POSTDECREMENT_EXPR)
10421 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10426 error ("%qD cannot have default arguments", decl);
10434 /* Return a string giving the keyword associate with CODE. */
10436 static const char *
10437 tag_name (enum tag_types code)
10449 case typename_type:
10452 gcc_unreachable ();
10456 /* Name lookup in an elaborated-type-specifier (after the keyword
10457 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10458 elaborated-type-specifier is invalid, issue a diagnostic and return
10459 error_mark_node; otherwise, return the *_TYPE to which it referred.
10460 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10463 check_elaborated_type_specifier (enum tag_types tag_code,
10465 bool allow_template_p)
10471 struct S { struct S *p; };
10473 name lookup will find the TYPE_DECL for the implicit "S::S"
10474 typedef. Adjust for that here. */
10475 if (DECL_SELF_REFERENCE_P (decl))
10476 decl = TYPE_NAME (TREE_TYPE (decl));
10478 type = TREE_TYPE (decl);
10480 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10481 is false for this case as well. */
10482 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10484 error ("using template type parameter %qT after %qs",
10485 type, tag_name (tag_code));
10486 return error_mark_node;
10490 If the identifier resolves to a typedef-name or a template
10491 type-parameter, the elaborated-type-specifier is ill-formed.
10493 In other words, the only legitimate declaration to use in the
10494 elaborated type specifier is the implicit typedef created when
10495 the type is declared. */
10496 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10497 && tag_code != typename_type)
10499 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10500 error ("%q+D has a previous declaration here", decl);
10501 return error_mark_node;
10503 else if (TREE_CODE (type) != RECORD_TYPE
10504 && TREE_CODE (type) != UNION_TYPE
10505 && tag_code != enum_type
10506 && tag_code != typename_type)
10508 error ("%qT referred to as %qs", type, tag_name (tag_code));
10509 error ("%q+T has a previous declaration here", type);
10510 return error_mark_node;
10512 else if (TREE_CODE (type) != ENUMERAL_TYPE
10513 && tag_code == enum_type)
10515 error ("%qT referred to as enum", type);
10516 error ("%q+T has a previous declaration here", type);
10517 return error_mark_node;
10519 else if (!allow_template_p
10520 && TREE_CODE (type) == RECORD_TYPE
10521 && CLASSTYPE_IS_TEMPLATE (type))
10523 /* If a class template appears as elaborated type specifier
10524 without a template header such as:
10526 template <class T> class C {};
10527 void f(class C); // No template header here
10529 then the required template argument is missing. */
10530 error ("template argument required for %<%s %T%>",
10531 tag_name (tag_code),
10532 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10533 return error_mark_node;
10539 /* Lookup NAME in elaborate type specifier in scope according to
10540 SCOPE and issue diagnostics if necessary.
10541 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10542 found, and ERROR_MARK_NODE for type error. */
10545 lookup_and_check_tag (enum tag_types tag_code, tree name,
10546 tag_scope scope, bool template_header_p)
10550 if (scope == ts_global)
10552 /* First try ordinary name lookup, ignoring hidden class name
10553 injected via friend declaration. */
10554 decl = lookup_name_prefer_type (name, 2);
10555 /* If that fails, the name will be placed in the smallest
10556 non-class, non-function-prototype scope according to 3.3.1/5.
10557 We may already have a hidden name declared as friend in this
10558 scope. So lookup again but not ignoring hidden names.
10559 If we find one, that name will be made visible rather than
10560 creating a new tag. */
10562 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10565 decl = lookup_type_scope (name, scope);
10567 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10568 decl = DECL_TEMPLATE_RESULT (decl);
10570 if (decl && TREE_CODE (decl) == TYPE_DECL)
10572 /* Look for invalid nested type:
10576 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10578 error ("%qD has the same name as the class in which it is "
10581 return error_mark_node;
10584 /* Two cases we need to consider when deciding if a class
10585 template is allowed as an elaborated type specifier:
10586 1. It is a self reference to its own class.
10587 2. It comes with a template header.
10591 template <class T> class C {
10592 class C *c1; // DECL_SELF_REFERENCE_P is true
10595 template <class U> class C; // template_header_p is true
10596 template <class T> class C<T>::D {
10597 class C *c2; // DECL_SELF_REFERENCE_P is true
10600 t = check_elaborated_type_specifier (tag_code,
10603 | DECL_SELF_REFERENCE_P (decl));
10606 else if (decl && TREE_CODE (decl) == TREE_LIST)
10608 error ("reference to %qD is ambiguous", name);
10609 print_candidates (decl);
10610 return error_mark_node;
10616 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10617 Define the tag as a forward-reference if it is not defined.
10619 If a declaration is given, process it here, and report an error if
10620 multiple declarations are not identical.
10622 SCOPE is TS_CURRENT when this is also a definition. Only look in
10623 the current frame for the name (since C++ allows new names in any
10624 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10625 declaration. Only look beginning from the current scope outward up
10626 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10628 TEMPLATE_HEADER_P is true when this declaration is preceded by
10629 a set of template parameters. */
10632 xref_tag (enum tag_types tag_code, tree name,
10633 tag_scope scope, bool template_header_p)
10635 enum tree_code code;
10637 tree context = NULL_TREE;
10639 timevar_push (TV_NAME_LOOKUP);
10641 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10647 code = RECORD_TYPE;
10653 code = ENUMERAL_TYPE;
10656 gcc_unreachable ();
10659 /* In case of anonymous name, xref_tag is only called to
10660 make type node and push name. Name lookup is not required. */
10661 if (ANON_AGGRNAME_P (name))
10664 t = lookup_and_check_tag (tag_code, name,
10665 scope, template_header_p);
10667 if (t == error_mark_node)
10668 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10670 if (scope != ts_current && t && current_class_type
10671 && template_class_depth (current_class_type)
10672 && template_header_p)
10674 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10675 definition of this tag. Since, in addition, we are currently
10676 processing a (member) template declaration of a template
10677 class, we must be very careful; consider:
10684 { template <class V>
10685 friend struct S1; };
10687 Here, the S2::S1 declaration should not be confused with the
10688 outer declaration. In particular, the inner version should
10689 have a template parameter of level 2, not level 1. This
10690 would be particularly important if the member declaration
10693 template <class V = U> friend struct S1;
10695 say, when we should tsubst into `U' when instantiating
10696 S2. On the other hand, when presented with:
10706 we must find the inner binding eventually. We
10707 accomplish this by making sure that the new type we
10708 create to represent this declaration has the right
10710 context = TYPE_CONTEXT (t);
10716 /* If no such tag is yet defined, create a forward-reference node
10717 and record it as the "definition".
10718 When a real declaration of this type is found,
10719 the forward-reference will be altered into a real type. */
10720 if (code == ENUMERAL_TYPE)
10722 error ("use of enum %q#D without previous declaration", name);
10723 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10727 t = make_class_type (code);
10728 TYPE_CONTEXT (t) = context;
10729 t = pushtag (name, t, scope);
10734 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10736 if (!redeclare_class_template (t, current_template_parms))
10737 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10739 else if (!processing_template_decl
10740 && CLASS_TYPE_P (t)
10741 && CLASSTYPE_IS_TEMPLATE (t))
10743 error ("redeclaration of %qT as a non-template", t);
10744 error ("previous declaration %q+D", t);
10745 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10748 /* Make injected friend class visible. */
10749 if (scope != ts_within_enclosing_non_class
10750 && hidden_name_p (TYPE_NAME (t)))
10752 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10753 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10755 if (TYPE_TEMPLATE_INFO (t))
10757 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10758 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10763 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10767 xref_tag_from_type (tree old, tree id, tag_scope scope)
10769 enum tag_types tag_kind;
10771 if (TREE_CODE (old) == RECORD_TYPE)
10772 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10774 tag_kind = union_type;
10776 if (id == NULL_TREE)
10777 id = TYPE_IDENTIFIER (old);
10779 return xref_tag (tag_kind, id, scope, false);
10782 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10783 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10784 access_* node, and the TREE_VALUE is the type of the base-class.
10785 Non-NULL TREE_TYPE indicates virtual inheritance.
10787 Returns true if the binfo hierarchy was successfully created,
10788 false if an error was detected. */
10791 xref_basetypes (tree ref, tree base_list)
10794 tree binfo, base_binfo;
10795 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10796 unsigned max_bases = 0; /* Maximum direct bases. */
10798 tree default_access;
10799 tree igo_prev; /* Track Inheritance Graph Order. */
10801 if (ref == error_mark_node)
10804 /* The base of a derived class is private by default, all others are
10806 default_access = (TREE_CODE (ref) == RECORD_TYPE
10807 && CLASSTYPE_DECLARED_CLASS (ref)
10808 ? access_private_node : access_public_node);
10810 /* First, make sure that any templates in base-classes are
10811 instantiated. This ensures that if we call ourselves recursively
10812 we do not get confused about which classes are marked and which
10814 basep = &base_list;
10817 tree basetype = TREE_VALUE (*basep);
10819 if (!(processing_template_decl && uses_template_parms (basetype))
10820 && !complete_type_or_else (basetype, NULL))
10821 /* An incomplete type. Remove it from the list. */
10822 *basep = TREE_CHAIN (*basep);
10826 if (TREE_TYPE (*basep))
10828 if (CLASS_TYPE_P (basetype))
10829 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10830 basep = &TREE_CHAIN (*basep);
10834 TYPE_MARKED_P (ref) = 1;
10836 /* The binfo slot should be empty, unless this is an (ill-formed)
10838 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10839 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10841 binfo = make_tree_binfo (max_bases);
10843 TYPE_BINFO (ref) = binfo;
10844 BINFO_OFFSET (binfo) = size_zero_node;
10845 BINFO_TYPE (binfo) = ref;
10847 /* Apply base-class info set up to the variants of this type. */
10848 fixup_type_variants (ref);
10852 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10853 /* An aggregate cannot have baseclasses. */
10854 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10856 if (TREE_CODE (ref) == UNION_TYPE)
10858 error ("derived union %qT invalid", ref);
10865 if (TYPE_FOR_JAVA (ref))
10867 error ("Java class %qT cannot have multiple bases", ref);
10874 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10876 if (TYPE_FOR_JAVA (ref))
10878 error ("Java class %qT cannot have virtual bases", ref);
10883 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10885 tree access = TREE_PURPOSE (base_list);
10886 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10887 tree basetype = TREE_VALUE (base_list);
10889 if (access == access_default_node)
10890 access = default_access;
10892 if (PACK_EXPANSION_P (basetype))
10893 basetype = PACK_EXPANSION_PATTERN (basetype);
10894 if (TREE_CODE (basetype) == TYPE_DECL)
10895 basetype = TREE_TYPE (basetype);
10896 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10898 error ("base type %qT fails to be a struct or class type",
10903 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10904 TYPE_FOR_JAVA (ref) = 1;
10906 base_binfo = NULL_TREE;
10907 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10909 base_binfo = TYPE_BINFO (basetype);
10910 /* The original basetype could have been a typedef'd type. */
10911 basetype = BINFO_TYPE (base_binfo);
10913 /* Inherit flags from the base. */
10914 TYPE_HAS_NEW_OPERATOR (ref)
10915 |= TYPE_HAS_NEW_OPERATOR (basetype);
10916 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10917 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10918 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10919 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10920 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10921 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10922 CLASSTYPE_REPEATED_BASE_P (ref)
10923 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10926 /* We must do this test after we've seen through a typedef
10928 if (TYPE_MARKED_P (basetype))
10930 if (basetype == ref)
10931 error ("recursive type %qT undefined", basetype);
10933 error ("duplicate base type %qT invalid", basetype);
10937 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10938 /* Regenerate the pack expansion for the bases. */
10939 basetype = make_pack_expansion (basetype);
10941 TYPE_MARKED_P (basetype) = 1;
10943 base_binfo = copy_binfo (base_binfo, basetype, ref,
10944 &igo_prev, via_virtual);
10945 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10946 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10948 BINFO_BASE_APPEND (binfo, base_binfo);
10949 BINFO_BASE_ACCESS_APPEND (binfo, access);
10952 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10953 /* If we have space in the vbase vector, we must have shared at
10954 least one of them, and are therefore diamond shaped. */
10955 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10957 /* Unmark all the types. */
10958 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10959 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10960 TYPE_MARKED_P (ref) = 0;
10962 /* Now see if we have a repeated base type. */
10963 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10965 for (base_binfo = binfo; base_binfo;
10966 base_binfo = TREE_CHAIN (base_binfo))
10968 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10970 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10973 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10975 for (base_binfo = binfo; base_binfo;
10976 base_binfo = TREE_CHAIN (base_binfo))
10977 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10978 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10987 /* Begin compiling the definition of an enumeration type.
10990 UNDERLYING_TYPE is the type that will be used as the storage for
10991 the enumeration type. This should be NULL_TREE if no storage type
10994 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10996 Returns the type object, as yet incomplete.
10997 Also records info about it so that build_enumerator
10998 may be used to declare the individual values as they are read. */
11001 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11005 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11007 /* If this is the real definition for a previous forward reference,
11008 fill in the contents in the same object that used to be the
11009 forward reference. */
11011 enumtype = lookup_and_check_tag (enum_type, name,
11012 /*tag_scope=*/ts_current,
11013 /*template_header_p=*/false);
11015 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11017 error_at (input_location, "multiple definition of %q#T", enumtype);
11018 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11019 "previous definition here");
11020 /* Clear out TYPE_VALUES, and start again. */
11021 TYPE_VALUES (enumtype) = NULL_TREE;
11025 /* In case of error, make a dummy enum to allow parsing to
11027 if (enumtype == error_mark_node)
11028 name = make_anon_name ();
11030 enumtype = make_node (ENUMERAL_TYPE);
11031 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11034 if (enumtype == error_mark_node)
11039 SET_SCOPED_ENUM_P (enumtype, 1);
11040 begin_scope (sk_scoped_enum, enumtype);
11042 /* [C++0x dcl.enum]p5:
11044 If not explicitly specified, the underlying type of a scoped
11045 enumeration type is int. */
11046 if (!underlying_type)
11047 underlying_type = integer_type_node;
11050 if (underlying_type)
11052 if (CP_INTEGRAL_TYPE_P (underlying_type))
11054 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11055 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11056 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11057 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11058 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11059 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11060 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11061 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11062 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11063 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11065 else if (!dependent_type_p (underlying_type))
11066 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11067 underlying_type, enumtype);
11073 /* After processing and defining all the values of an enumeration type,
11074 install their decls in the enumeration type and finish it off.
11075 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11078 finish_enum (tree enumtype)
11087 bool use_short_enum;
11092 tree underlying_type = NULL_TREE;
11093 bool fixed_underlying_type_p
11094 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11096 /* We built up the VALUES in reverse order. */
11097 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11099 /* For an enum defined in a template, just set the type of the values;
11100 all further processing is postponed until the template is
11101 instantiated. We need to set the type so that tsubst of a CONST_DECL
11103 if (processing_template_decl)
11105 for (values = TYPE_VALUES (enumtype);
11107 values = TREE_CHAIN (values))
11108 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11109 if (at_function_scope_p ())
11110 add_stmt (build_min (TAG_DEFN, enumtype));
11111 if (SCOPED_ENUM_P (enumtype))
11116 /* Determine the minimum and maximum values of the enumerators. */
11117 if (TYPE_VALUES (enumtype))
11119 minnode = maxnode = NULL_TREE;
11121 for (values = TYPE_VALUES (enumtype);
11123 values = TREE_CHAIN (values))
11125 decl = TREE_VALUE (values);
11127 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11128 each enumerator has the type of its enumeration. Prior to the
11129 closing brace, the type of each enumerator is the type of its
11130 initializing value. */
11131 TREE_TYPE (decl) = enumtype;
11133 /* Update the minimum and maximum values, if appropriate. */
11134 value = DECL_INITIAL (decl);
11135 if (value == error_mark_node)
11136 value = integer_zero_node;
11137 /* Figure out what the minimum and maximum values of the
11138 enumerators are. */
11140 minnode = maxnode = value;
11141 else if (tree_int_cst_lt (maxnode, value))
11143 else if (tree_int_cst_lt (value, minnode))
11150 If the enumerator-list is empty, the underlying type is as if
11151 the enumeration had a single enumerator with value 0. */
11152 minnode = maxnode = integer_zero_node;
11154 /* Compute the number of bits require to represent all values of the
11155 enumeration. We must do this before the type of MINNODE and
11156 MAXNODE are transformed, since tree_int_cst_min_precision relies
11157 on the TREE_TYPE of the value it is passed. */
11158 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11159 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11160 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11161 precision = MAX (lowprec, highprec);
11163 if (!fixed_underlying_type_p)
11165 /* Determine the underlying type of the enumeration.
11169 The underlying type of an enumeration is an integral type that
11170 can represent all the enumerator values defined in the
11171 enumeration. It is implementation-defined which integral type is
11172 used as the underlying type for an enumeration except that the
11173 underlying type shall not be larger than int unless the value of
11174 an enumerator cannot fit in an int or unsigned int.
11176 We use "int" or an "unsigned int" as the underlying type, even if
11177 a smaller integral type would work, unless the user has
11178 explicitly requested that we use the smallest possible type. The
11179 user can request that for all enumerations with a command line
11180 flag, or for just one enumeration with an attribute. */
11182 use_short_enum = flag_short_enums
11183 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11185 for (itk = (use_short_enum ? itk_char : itk_int);
11189 underlying_type = integer_types[itk];
11190 if (TYPE_PRECISION (underlying_type) >= precision
11191 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11194 if (itk == itk_none)
11198 IF no integral type can represent all the enumerator values, the
11199 enumeration is ill-formed. */
11200 error ("no integral type can represent all of the enumerator values "
11201 "for %qT", enumtype);
11202 precision = TYPE_PRECISION (long_long_integer_type_node);
11203 underlying_type = integer_types[itk_unsigned_long_long];
11208 The value of sizeof() applied to an enumeration type, an object
11209 of an enumeration type, or an enumerator, is the value of sizeof()
11210 applied to the underlying type. */
11211 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11212 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11213 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11214 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11215 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11216 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11218 /* Set the underlying type of the enumeration type to the
11219 computed enumeration type, restricted to the enumerator
11221 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11222 set_min_and_max_values_for_integral_type
11223 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11226 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11228 /* Compute the minimum and maximum values for the type.
11232 For an enumeration where emin is the smallest enumerator and emax
11233 is the largest, the values of the enumeration are the values of the
11234 underlying type in the range bmin to bmax, where bmin and bmax are,
11235 respectively, the smallest and largest values of the smallest bit-
11236 field that can store emin and emax. */
11238 /* The middle-end currently assumes that types with TYPE_PRECISION
11239 narrower than their underlying type are suitably zero or sign
11240 extended to fill their mode. g++ doesn't make these guarantees.
11241 Until the middle-end can represent such paradoxical types, we
11242 set the TYPE_PRECISION to the width of the underlying type. */
11243 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11245 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11247 /* Convert each of the enumerators to the type of the underlying
11248 type of the enumeration. */
11249 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11251 location_t saved_location;
11253 decl = TREE_VALUE (values);
11254 saved_location = input_location;
11255 input_location = DECL_SOURCE_LOCATION (decl);
11256 if (fixed_underlying_type_p)
11257 /* If the enumeration type has a fixed underlying type, we
11258 already checked all of the enumerator values. */
11259 value = DECL_INITIAL (decl);
11261 value = perform_implicit_conversion (underlying_type,
11262 DECL_INITIAL (decl),
11263 tf_warning_or_error);
11264 input_location = saved_location;
11266 /* Do not clobber shared ints. */
11267 value = copy_node (value);
11269 TREE_TYPE (value) = enumtype;
11270 DECL_INITIAL (decl) = value;
11273 /* Fix up all variant types of this enum type. */
11274 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11276 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11277 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11278 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11279 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11280 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11281 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11282 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11283 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11284 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11285 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11286 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11289 /* Finish up the scope of a scoped enumeration. */
11290 if (SCOPED_ENUM_P (enumtype))
11293 /* Finish debugging output for this type. */
11294 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11297 /* Build and install a CONST_DECL for an enumeration constant of the
11298 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11299 Assignment of sequential values by default is handled here. */
11302 build_enumerator (tree name, tree value, tree enumtype)
11308 /* If the VALUE was erroneous, pretend it wasn't there; that will
11309 result in the enum being assigned the next value in sequence. */
11310 if (value == error_mark_node)
11313 /* Remove no-op casts from the value. */
11315 STRIP_TYPE_NOPS (value);
11317 if (! processing_template_decl)
11319 /* Validate and default VALUE. */
11320 if (value != NULL_TREE)
11322 value = integral_constant_value (value);
11324 if (TREE_CODE (value) == INTEGER_CST)
11326 value = perform_integral_promotions (value);
11327 constant_expression_warning (value);
11331 error ("enumerator value for %qD is not an integer constant", name);
11336 /* Default based on previous value. */
11337 if (value == NULL_TREE)
11339 if (TYPE_VALUES (enumtype))
11342 unsigned HOST_WIDE_INT lo;
11346 /* The next value is the previous value plus one.
11347 add_double doesn't know the type of the target expression,
11348 so we must check with int_fits_type_p as well. */
11349 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11350 if (error_operand_p (prev_value))
11351 value = error_mark_node;
11354 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11355 TREE_INT_CST_HIGH (prev_value),
11357 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11359 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11363 error ("overflow in enumeration values at %qD", name);
11364 value = error_mark_node;
11369 value = integer_zero_node;
11372 /* Remove no-op casts from the value. */
11373 STRIP_TYPE_NOPS (value);
11375 /* If the underlying type of the enum is fixed, check whether
11376 the enumerator values fits in the underlying type. If it
11377 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11378 if (ENUM_UNDERLYING_TYPE (enumtype)
11380 && TREE_CODE (value) == INTEGER_CST
11381 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11383 error ("enumerator value %E is too large for underlying type %<%T%>",
11384 value, ENUM_UNDERLYING_TYPE (enumtype));
11386 /* Silently convert the value so that we can continue. */
11387 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11392 /* C++ associates enums with global, function, or class declarations. */
11393 context = current_scope ();
11395 /* Build the actual enumeration constant. Note that the enumeration
11396 constants have the underlying type of the enum (if it is fixed)
11397 or the type of their initializer (if the underlying type of the
11398 enum is not fixed):
11402 If the underlying type is fixed, the type of each enumerator
11403 prior to the closing brace is the underlying type; if the
11404 initializing value of an enumerator cannot be represented by
11405 the underlying type, the program is ill-formed. If the
11406 underlying type is not fixed, the type of each enumerator is
11407 the type of its initializing value.
11409 If the underlying type is not fixed, it will be computed by
11410 finish_enum and we will reset the type of this enumerator. Of
11411 course, if we're processing a template, there may be no value. */
11412 type = value ? TREE_TYPE (value) : NULL_TREE;
11414 if (context && context == current_class_type)
11415 /* This enum declaration is local to the class. We need the full
11416 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11417 decl = build_lang_decl (CONST_DECL, name, type);
11419 /* It's a global enum, or it's local to a function. (Note local to
11420 a function could mean local to a class method. */
11421 decl = build_decl (input_location, CONST_DECL, name, type);
11423 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11424 TREE_CONSTANT (decl) = 1;
11425 TREE_READONLY (decl) = 1;
11426 DECL_INITIAL (decl) = value;
11428 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11429 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11430 on the TYPE_FIELDS list for `S'. (That's so that you can say
11431 things like `S::i' later.) */
11432 finish_member_declaration (decl);
11436 /* Add this enumeration constant to the list for this type. */
11437 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11440 /* Look for an enumerator with the given NAME within the enumeration
11441 type ENUMTYPE. This routine is used primarily for qualified name
11442 lookup into an enumerator in C++0x, e.g.,
11444 enum class Color { Red, Green, Blue };
11446 Color color = Color::Red;
11448 Returns the value corresponding to the enumerator, or
11449 NULL_TREE if no such enumerator was found. */
11451 lookup_enumerator (tree enumtype, tree name)
11454 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11456 e = purpose_member (name, TYPE_VALUES (enumtype));
11457 return e? TREE_VALUE (e) : NULL_TREE;
11461 /* We're defining DECL. Make sure that it's type is OK. */
11464 check_function_type (tree decl, tree current_function_parms)
11466 tree fntype = TREE_TYPE (decl);
11467 tree return_type = complete_type (TREE_TYPE (fntype));
11469 /* In a function definition, arg types must be complete. */
11470 require_complete_types_for_parms (current_function_parms);
11472 if (dependent_type_p (return_type))
11474 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11475 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11477 tree args = TYPE_ARG_TYPES (fntype);
11479 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11480 error ("return type %q#T is incomplete", return_type);
11482 error ("return type has Java class type %q#T", return_type);
11484 /* Make it return void instead. */
11485 if (TREE_CODE (fntype) == METHOD_TYPE)
11486 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11488 TREE_CHAIN (args));
11490 fntype = build_function_type (void_type_node, args);
11492 = build_exception_variant (fntype,
11493 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11496 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11499 /* Create the FUNCTION_DECL for a function definition.
11500 DECLSPECS and DECLARATOR are the parts of the declaration;
11501 they describe the function's name and the type it returns,
11502 but twisted together in a fashion that parallels the syntax of C.
11504 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11505 DECLARATOR is really the DECL for the function we are about to
11506 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11507 indicating that the function is an inline defined in-class.
11509 This function creates a binding context for the function body
11510 as well as setting up the FUNCTION_DECL in current_function_decl.
11512 For C++, we must first check whether that datum makes any sense.
11513 For example, "class A local_a(1,2);" means that variable local_a
11514 is an aggregate of type A, which should have a constructor
11515 applied to it with the argument list [1, 2].
11517 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11518 or may be a BLOCK if the function has been defined previously
11519 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11520 error_mark_node if the function has never been defined, or
11521 a BLOCK if the function has been defined somewhere. */
11524 start_preparsed_function (tree decl1, tree attrs, int flags)
11526 tree ctype = NULL_TREE;
11529 int doing_friend = 0;
11530 struct cp_binding_level *bl;
11531 tree current_function_parms;
11532 struct c_fileinfo *finfo
11533 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11534 bool honor_interface;
11536 /* Sanity check. */
11537 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11538 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11540 fntype = TREE_TYPE (decl1);
11541 if (TREE_CODE (fntype) == METHOD_TYPE)
11542 ctype = TYPE_METHOD_BASETYPE (fntype);
11544 /* ISO C++ 11.4/5. A friend function defined in a class is in
11545 the (lexical) scope of the class in which it is defined. */
11546 if (!ctype && DECL_FRIEND_P (decl1))
11548 ctype = DECL_FRIEND_CONTEXT (decl1);
11550 /* CTYPE could be null here if we're dealing with a template;
11551 for example, `inline friend float foo()' inside a template
11552 will have no CTYPE set. */
11553 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11559 if (DECL_DECLARED_INLINE_P (decl1)
11560 && lookup_attribute ("noinline", attrs))
11561 warning (0, "inline function %q+D given attribute noinline", decl1);
11563 /* Handle gnu_inline attribute. */
11564 if (GNU_INLINE_P (decl1))
11566 DECL_EXTERNAL (decl1) = 1;
11567 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11568 DECL_INTERFACE_KNOWN (decl1) = 1;
11569 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11572 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11573 /* This is a constructor, we must ensure that any default args
11574 introduced by this definition are propagated to the clones
11575 now. The clones are used directly in overload resolution. */
11576 adjust_clone_args (decl1);
11578 /* Sometimes we don't notice that a function is a static member, and
11579 build a METHOD_TYPE for it. Fix that up now. */
11580 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11581 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11583 revert_static_member_fn (decl1);
11587 /* Set up current_class_type, and enter the scope of the class, if
11590 push_nested_class (ctype);
11591 else if (DECL_STATIC_FUNCTION_P (decl1))
11592 push_nested_class (DECL_CONTEXT (decl1));
11594 /* Now that we have entered the scope of the class, we must restore
11595 the bindings for any template parameters surrounding DECL1, if it
11596 is an inline member template. (Order is important; consider the
11597 case where a template parameter has the same name as a field of
11598 the class.) It is not until after this point that
11599 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11600 if (flags & SF_INCLASS_INLINE)
11601 maybe_begin_member_template_processing (decl1);
11603 /* Effective C++ rule 15. */
11605 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11606 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11607 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11609 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11610 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11611 if (!DECL_INITIAL (decl1))
11612 DECL_INITIAL (decl1) = error_mark_node;
11614 /* This function exists in static storage.
11615 (This does not mean `static' in the C sense!) */
11616 TREE_STATIC (decl1) = 1;
11618 /* We must call push_template_decl after current_class_type is set
11619 up. (If we are processing inline definitions after exiting a
11620 class scope, current_class_type will be NULL_TREE until set above
11621 by push_nested_class.) */
11622 if (processing_template_decl)
11624 /* FIXME: Handle error_mark_node more gracefully. */
11625 tree newdecl1 = push_template_decl (decl1);
11626 if (newdecl1 != error_mark_node)
11630 /* We are now in the scope of the function being defined. */
11631 current_function_decl = decl1;
11633 /* Save the parm names or decls from this function's declarator
11634 where store_parm_decls will find them. */
11635 current_function_parms = DECL_ARGUMENTS (decl1);
11637 /* Make sure the parameter and return types are reasonable. When
11638 you declare a function, these types can be incomplete, but they
11639 must be complete when you define the function. */
11640 check_function_type (decl1, current_function_parms);
11642 /* Build the return declaration for the function. */
11643 restype = TREE_TYPE (fntype);
11644 if (DECL_RESULT (decl1) == NULL_TREE)
11648 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11649 DECL_ARTIFICIAL (resdecl) = 1;
11650 DECL_IGNORED_P (resdecl) = 1;
11651 DECL_RESULT (decl1) = resdecl;
11653 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11656 /* Let the user know we're compiling this function. */
11657 announce_function (decl1);
11659 /* Record the decl so that the function name is defined.
11660 If we already have a decl for this name, and it is a FUNCTION_DECL,
11661 use the old decl. */
11662 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11664 /* A specialization is not used to guide overload resolution. */
11665 if (!DECL_FUNCTION_MEMBER_P (decl1)
11666 && !(DECL_USE_TEMPLATE (decl1) &&
11667 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11669 tree olddecl = pushdecl (decl1);
11671 if (olddecl == error_mark_node)
11672 /* If something went wrong when registering the declaration,
11673 use DECL1; we have to have a FUNCTION_DECL to use when
11674 parsing the body of the function. */
11678 /* Otherwise, OLDDECL is either a previous declaration
11679 of the same function or DECL1 itself. */
11681 if (warn_missing_declarations
11682 && olddecl == decl1
11683 && !DECL_MAIN_P (decl1)
11684 && TREE_PUBLIC (decl1)
11685 && !DECL_DECLARED_INLINE_P (decl1))
11689 /* Check whether DECL1 is in an anonymous
11691 for (context = DECL_CONTEXT (decl1);
11693 context = DECL_CONTEXT (context))
11695 if (TREE_CODE (context) == NAMESPACE_DECL
11696 && DECL_NAME (context) == NULL_TREE)
11700 if (context == NULL)
11701 warning (OPT_Wmissing_declarations,
11702 "no previous declaration for %q+D", decl1);
11710 /* We need to set the DECL_CONTEXT. */
11711 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11712 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11714 fntype = TREE_TYPE (decl1);
11716 /* If #pragma weak applies, mark the decl appropriately now.
11717 The pragma only applies to global functions. Because
11718 determining whether or not the #pragma applies involves
11719 computing the mangled name for the declaration, we cannot
11720 apply the pragma until after we have merged this declaration
11721 with any previous declarations; if the original declaration
11722 has a linkage specification, that specification applies to
11723 the definition as well, and may affect the mangled name. */
11724 if (!DECL_CONTEXT (decl1))
11725 maybe_apply_pragma_weak (decl1);
11728 /* Reset this in case the call to pushdecl changed it. */
11729 current_function_decl = decl1;
11731 gcc_assert (DECL_INITIAL (decl1));
11733 /* This function may already have been parsed, in which case just
11734 return; our caller will skip over the body without parsing. */
11735 if (DECL_INITIAL (decl1) != error_mark_node)
11738 /* Initialize RTL machinery. We cannot do this until
11739 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11740 even when processing a template; this is how we get
11741 CFUN set up, and our per-function variables initialized.
11742 FIXME factor out the non-RTL stuff. */
11743 bl = current_binding_level;
11744 allocate_struct_function (decl1, processing_template_decl);
11746 /* Initialize the language data structures. Whenever we start
11747 a new function, we destroy temporaries in the usual way. */
11748 cfun->language = GGC_CNEW (struct language_function);
11749 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11750 current_binding_level = bl;
11752 /* Even though we're inside a function body, we still don't want to
11753 call expand_expr to calculate the size of a variable-sized array.
11754 We haven't necessarily assigned RTL to all variables yet, so it's
11755 not safe to try to expand expressions involving them. */
11756 cfun->dont_save_pending_sizes_p = 1;
11758 /* Start the statement-tree, start the tree now. */
11759 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11761 /* If we are (erroneously) defining a function that we have already
11762 defined before, wipe out what we knew before. */
11763 if (!DECL_PENDING_INLINE_P (decl1))
11764 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11766 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11768 /* We know that this was set up by `grokclassfn'. We do not
11769 wait until `store_parm_decls', since evil parse errors may
11770 never get us to that point. Here we keep the consistency
11771 between `current_class_type' and `current_class_ptr'. */
11772 tree t = DECL_ARGUMENTS (decl1);
11774 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11775 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11777 cp_function_chain->x_current_class_ref
11778 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11779 cp_function_chain->x_current_class_ptr = t;
11781 /* Constructors and destructors need to know whether they're "in
11782 charge" of initializing virtual base classes. */
11783 t = TREE_CHAIN (t);
11784 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11786 current_in_charge_parm = t;
11787 t = TREE_CHAIN (t);
11789 if (DECL_HAS_VTT_PARM_P (decl1))
11791 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11792 current_vtt_parm = t;
11796 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11797 /* Implicitly-defined methods (like the
11798 destructor for a class in which no destructor
11799 is explicitly declared) must not be defined
11800 until their definition is needed. So, we
11801 ignore interface specifications for
11802 compiler-generated functions. */
11803 && !DECL_ARTIFICIAL (decl1));
11805 if (DECL_INTERFACE_KNOWN (decl1))
11807 tree ctx = decl_function_context (decl1);
11809 if (DECL_NOT_REALLY_EXTERN (decl1))
11810 DECL_EXTERNAL (decl1) = 0;
11812 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11813 && TREE_PUBLIC (ctx))
11814 /* This is a function in a local class in an extern inline
11816 comdat_linkage (decl1);
11818 /* If this function belongs to an interface, it is public.
11819 If it belongs to someone else's interface, it is also external.
11820 This only affects inlines and template instantiations. */
11821 else if (!finfo->interface_unknown && honor_interface)
11823 if (DECL_DECLARED_INLINE_P (decl1)
11824 || DECL_TEMPLATE_INSTANTIATION (decl1)
11825 || processing_template_decl)
11827 DECL_EXTERNAL (decl1)
11828 = (finfo->interface_only
11829 || (DECL_DECLARED_INLINE_P (decl1)
11830 && ! flag_implement_inlines
11831 && !DECL_VINDEX (decl1)));
11833 /* For WIN32 we also want to put these in linkonce sections. */
11834 maybe_make_one_only (decl1);
11837 DECL_EXTERNAL (decl1) = 0;
11838 DECL_INTERFACE_KNOWN (decl1) = 1;
11839 /* If this function is in an interface implemented in this file,
11840 make sure that the back end knows to emit this function
11842 if (!DECL_EXTERNAL (decl1))
11843 mark_needed (decl1);
11845 else if (finfo->interface_unknown && finfo->interface_only
11846 && honor_interface)
11848 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11849 interface, we will have both finfo->interface_unknown and
11850 finfo->interface_only set. In that case, we don't want to
11851 use the normal heuristics because someone will supply a
11852 #pragma implementation elsewhere, and deducing it here would
11853 produce a conflict. */
11854 comdat_linkage (decl1);
11855 DECL_EXTERNAL (decl1) = 0;
11856 DECL_INTERFACE_KNOWN (decl1) = 1;
11857 DECL_DEFER_OUTPUT (decl1) = 1;
11861 /* This is a definition, not a reference.
11862 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11863 if (!GNU_INLINE_P (decl1))
11864 DECL_EXTERNAL (decl1) = 0;
11866 if ((DECL_DECLARED_INLINE_P (decl1)
11867 || DECL_TEMPLATE_INSTANTIATION (decl1))
11868 && ! DECL_INTERFACE_KNOWN (decl1)
11869 /* Don't try to defer nested functions for now. */
11870 && ! decl_function_context (decl1))
11871 DECL_DEFER_OUTPUT (decl1) = 1;
11873 DECL_INTERFACE_KNOWN (decl1) = 1;
11876 /* Determine the ELF visibility attribute for the function. We must not
11877 do this before calling "pushdecl", as we must allow "duplicate_decls"
11878 to merge any attributes appropriately. We also need to wait until
11880 if (!DECL_CLONED_FUNCTION_P (decl1))
11881 determine_visibility (decl1);
11883 begin_scope (sk_function_parms, decl1);
11887 if (DECL_DESTRUCTOR_P (decl1)
11888 || (DECL_CONSTRUCTOR_P (decl1)
11889 && targetm.cxx.cdtor_returns_this ()))
11891 cdtor_label = build_decl (input_location,
11892 LABEL_DECL, NULL_TREE, NULL_TREE);
11893 DECL_CONTEXT (cdtor_label) = current_function_decl;
11896 start_fname_decls ();
11898 store_parm_decls (current_function_parms);
11902 /* Like start_preparsed_function, except that instead of a
11903 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11905 Returns 1 on success. If the DECLARATOR is not suitable for a function
11906 (it defines a datum instead), we return 0, which tells
11907 yyparse to report a parse error. */
11910 start_function (cp_decl_specifier_seq *declspecs,
11911 const cp_declarator *declarator,
11916 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11917 if (decl1 == error_mark_node)
11919 /* If the declarator is not suitable for a function definition,
11920 cause a syntax error. */
11921 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11923 error ("invalid function declaration");
11927 if (DECL_MAIN_P (decl1))
11928 /* main must return int. grokfndecl should have corrected it
11929 (and issued a diagnostic) if the user got it wrong. */
11930 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11931 integer_type_node));
11933 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11938 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11942 use_eh_spec_block (tree fn)
11944 return (flag_exceptions && flag_enforce_eh_specs
11945 && !processing_template_decl
11946 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11947 /* We insert the EH_SPEC_BLOCK only in the original
11948 function; then, it is copied automatically to the
11950 && !DECL_CLONED_FUNCTION_P (fn)
11951 /* Implicitly-generated constructors and destructors have
11952 exception specifications. However, those specifications
11953 are the union of the possible exceptions specified by the
11954 constructors/destructors for bases and members, so no
11955 unallowed exception will ever reach this function. By
11956 not creating the EH_SPEC_BLOCK we save a little memory,
11957 and we avoid spurious warnings about unreachable
11959 && !DECL_ARTIFICIAL (fn));
11962 /* Store the parameter declarations into the current function declaration.
11963 This is called after parsing the parameter declarations, before
11964 digesting the body of the function.
11966 Also install to binding contour return value identifier, if any. */
11969 store_parm_decls (tree current_function_parms)
11971 tree fndecl = current_function_decl;
11974 /* This is a chain of any other decls that came in among the parm
11975 declarations. If a parm is declared with enum {foo, bar} x;
11976 then CONST_DECLs for foo and bar are put here. */
11977 tree nonparms = NULL_TREE;
11979 if (current_function_parms)
11981 /* This case is when the function was defined with an ANSI prototype.
11982 The parms already have decls, so we need not do anything here
11983 except record them as in effect
11984 and complain if any redundant old-style parm decls were written. */
11986 tree specparms = current_function_parms;
11989 /* Must clear this because it might contain TYPE_DECLs declared
11991 current_binding_level->names = NULL;
11993 /* If we're doing semantic analysis, then we'll call pushdecl
11994 for each of these. We must do them in reverse order so that
11995 they end in the correct forward order. */
11996 specparms = nreverse (specparms);
11998 for (parm = specparms; parm; parm = next)
12000 next = TREE_CHAIN (parm);
12001 if (TREE_CODE (parm) == PARM_DECL)
12003 if (DECL_NAME (parm) == NULL_TREE
12004 || TREE_CODE (parm) != VOID_TYPE)
12007 error ("parameter %qD declared void", parm);
12011 /* If we find an enum constant or a type tag,
12012 put it aside for the moment. */
12013 TREE_CHAIN (parm) = NULL_TREE;
12014 nonparms = chainon (nonparms, parm);
12018 /* Get the decls in their original chain order and record in the
12019 function. This is all and only the PARM_DECLs that were
12020 pushed into scope by the loop above. */
12021 DECL_ARGUMENTS (fndecl) = getdecls ();
12024 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12026 /* Now store the final chain of decls for the arguments
12027 as the decl-chain of the current lexical scope.
12028 Put the enumerators in as well, at the front so that
12029 DECL_ARGUMENTS is not modified. */
12030 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12032 if (use_eh_spec_block (current_function_decl))
12033 current_eh_spec_block = begin_eh_spec_block ();
12037 /* We have finished doing semantic analysis on DECL, but have not yet
12038 generated RTL for its body. Save away our current state, so that
12039 when we want to generate RTL later we know what to do. */
12042 save_function_data (tree decl)
12044 struct language_function *f;
12046 /* Save the language-specific per-function data so that we can
12047 get it back when we really expand this function. */
12048 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12051 f = GGC_NEW (struct language_function);
12052 memcpy (f, cp_function_chain, sizeof (struct language_function));
12053 DECL_SAVED_FUNCTION_DATA (decl) = f;
12055 /* Clear out the bits we don't need. */
12056 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12057 f->bindings = NULL;
12058 f->x_local_names = NULL;
12062 /* Set the return value of the constructor (if present). */
12065 finish_constructor_body (void)
12070 if (targetm.cxx.cdtor_returns_this ()
12071 && (! TYPE_FOR_JAVA (current_class_type)))
12073 /* Any return from a constructor will end up here. */
12074 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12076 val = DECL_ARGUMENTS (current_function_decl);
12077 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12078 DECL_RESULT (current_function_decl), val);
12079 /* Return the address of the object. */
12080 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12081 add_stmt (exprstmt);
12085 /* Do all the processing for the beginning of a destructor; set up the
12086 vtable pointers and cleanups for bases and members. */
12089 begin_destructor_body (void)
12091 tree compound_stmt;
12093 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12094 issued an error message. We still want to try to process the
12095 body of the function, but initialize_vtbl_ptrs will crash if
12096 TYPE_BINFO is NULL. */
12097 if (COMPLETE_TYPE_P (current_class_type))
12099 compound_stmt = begin_compound_stmt (0);
12100 /* Make all virtual function table pointers in non-virtual base
12101 classes point to CURRENT_CLASS_TYPE's virtual function
12103 initialize_vtbl_ptrs (current_class_ptr);
12104 finish_compound_stmt (compound_stmt);
12106 /* And insert cleanups for our bases and members so that they
12107 will be properly destroyed if we throw. */
12108 push_base_cleanups ();
12112 /* At the end of every destructor we generate code to delete the object if
12113 necessary. Do that now. */
12116 finish_destructor_body (void)
12120 /* Any return from a destructor will end up here; that way all base
12121 and member cleanups will be run when the function returns. */
12122 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12124 /* In a virtual destructor, we must call delete. */
12125 if (DECL_VIRTUAL_P (current_function_decl))
12128 tree virtual_size = cxx_sizeof (current_class_type);
12132 At the point of definition of a virtual destructor (including
12133 an implicit definition), non-placement operator delete shall
12134 be looked up in the scope of the destructor's class and if
12135 found shall be accessible and unambiguous. */
12136 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12138 /*global_p=*/false,
12139 /*placement=*/NULL_TREE,
12140 /*alloc_fn=*/NULL_TREE);
12142 if_stmt = begin_if_stmt ();
12143 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12144 current_in_charge_parm,
12147 finish_expr_stmt (exprstmt);
12148 finish_then_clause (if_stmt);
12149 finish_if_stmt (if_stmt);
12152 if (targetm.cxx.cdtor_returns_this ())
12156 val = DECL_ARGUMENTS (current_function_decl);
12157 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12158 DECL_RESULT (current_function_decl), val);
12159 /* Return the address of the object. */
12160 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12161 add_stmt (exprstmt);
12165 /* Do the necessary processing for the beginning of a function body, which
12166 in this case includes member-initializers, but not the catch clauses of
12167 a function-try-block. Currently, this means opening a binding level
12168 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12171 begin_function_body (void)
12175 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12178 if (processing_template_decl)
12179 /* Do nothing now. */;
12181 /* Always keep the BLOCK node associated with the outermost pair of
12182 curly braces of a function. These are needed for correct
12183 operation of dwarfout.c. */
12184 keep_next_level (true);
12186 stmt = begin_compound_stmt (BCS_FN_BODY);
12188 if (processing_template_decl)
12189 /* Do nothing now. */;
12190 else if (DECL_DESTRUCTOR_P (current_function_decl))
12191 begin_destructor_body ();
12196 /* Do the processing for the end of a function body. Currently, this means
12197 closing out the cleanups for fully-constructed bases and members, and in
12198 the case of the destructor, deleting the object if desired. Again, this
12199 is only meaningful for [cd]tors, since they are the only functions where
12200 there is a significant distinction between the main body and any
12201 function catch clauses. Handling, say, main() return semantics here
12202 would be wrong, as flowing off the end of a function catch clause for
12203 main() would also need to return 0. */
12206 finish_function_body (tree compstmt)
12208 if (compstmt == NULL_TREE)
12211 /* Close the block. */
12212 finish_compound_stmt (compstmt);
12214 if (processing_template_decl)
12215 /* Do nothing now. */;
12216 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12217 finish_constructor_body ();
12218 else if (DECL_DESTRUCTOR_P (current_function_decl))
12219 finish_destructor_body ();
12222 /* Given a function, returns the BLOCK corresponding to the outermost level
12223 of curly braces, skipping the artificial block created for constructor
12227 outer_curly_brace_block (tree fndecl)
12229 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12230 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12231 /* Skip the artificial function body block. */
12232 block = BLOCK_SUBBLOCKS (block);
12236 /* Finish up a function declaration and compile that function
12237 all the way to assembler language output. The free the storage
12238 for the function definition.
12240 FLAGS is a bitwise or of the following values:
12242 We just finished processing the body of an in-class inline
12243 function definition. (This processing will have taken place
12244 after the class definition is complete.) */
12247 finish_function (int flags)
12249 tree fndecl = current_function_decl;
12250 tree fntype, ctype = NULL_TREE;
12251 int inclass_inline = (flags & 2) != 0;
12254 /* When we get some parse errors, we can end up without a
12255 current_function_decl, so cope. */
12256 if (fndecl == NULL_TREE)
12257 return error_mark_node;
12259 gcc_assert (!defer_mark_used_calls);
12260 defer_mark_used_calls = true;
12262 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12263 && DECL_VIRTUAL_P (fndecl)
12264 && !processing_template_decl)
12266 tree fnclass = DECL_CONTEXT (fndecl);
12267 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12268 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12271 nested = function_depth > 1;
12272 fntype = TREE_TYPE (fndecl);
12274 /* TREE_READONLY (fndecl) = 1;
12275 This caused &foo to be of type ptr-to-const-function
12276 which then got a warning when stored in a ptr-to-function variable. */
12278 gcc_assert (building_stmt_tree ());
12279 /* The current function is being defined, so its DECL_INITIAL should
12280 be set, and unless there's a multiple definition, it should be
12281 error_mark_node. */
12282 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12284 /* For a cloned function, we've already got all the code we need;
12285 there's no need to add any extra bits. */
12286 if (!DECL_CLONED_FUNCTION_P (fndecl))
12288 if (DECL_MAIN_P (current_function_decl))
12292 /* Make it so that `main' always returns 0 by default (or
12295 stmt = finish_return_stmt (integer_one_node);
12297 stmt = finish_return_stmt (integer_zero_node);
12299 /* Hack. We don't want the middle-end to warn that this
12300 return is unreachable, so put the statement on the
12303 location_t linezero = linemap_line_start (line_table, 0, 1);
12304 SET_EXPR_LOCATION (stmt, linezero);
12308 if (use_eh_spec_block (current_function_decl))
12309 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12310 (TREE_TYPE (current_function_decl)),
12311 current_eh_spec_block);
12314 /* If we're saving up tree structure, tie off the function now. */
12315 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12317 finish_fname_decls ();
12319 /* If this function can't throw any exceptions, remember that. */
12320 if (!processing_template_decl
12321 && !cp_function_chain->can_throw
12322 && !flag_non_call_exceptions
12323 && !DECL_REPLACEABLE_P (fndecl))
12324 TREE_NOTHROW (fndecl) = 1;
12326 /* This must come after expand_function_end because cleanups might
12327 have declarations (from inline functions) that need to go into
12328 this function's blocks. */
12330 /* If the current binding level isn't the outermost binding level
12331 for this function, either there is a bug, or we have experienced
12332 syntax errors and the statement tree is malformed. */
12333 if (current_binding_level->kind != sk_function_parms)
12335 /* Make sure we have already experienced errors. */
12336 gcc_assert (errorcount);
12338 /* Throw away the broken statement tree and extra binding
12340 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12342 while (current_binding_level->kind != sk_function_parms)
12344 if (current_binding_level->kind == sk_class)
12345 pop_nested_class ();
12347 poplevel (0, 0, 0);
12350 poplevel (1, 0, 1);
12352 /* Statements should always be full-expressions at the outermost set
12353 of curly braces for a function. */
12354 gcc_assert (stmts_are_full_exprs_p ());
12356 /* Set up the named return value optimization, if we can. Candidate
12357 variables are selected in check_return_expr. */
12358 if (current_function_return_value)
12360 tree r = current_function_return_value;
12363 if (r != error_mark_node
12364 /* This is only worth doing for fns that return in memory--and
12365 simpler, since we don't have to worry about promoted modes. */
12366 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12367 /* Only allow this for variables declared in the outer scope of
12368 the function so we know that their lifetime always ends with a
12369 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12370 we were to do this optimization in tree-ssa. */
12371 && (outer = outer_curly_brace_block (fndecl))
12372 && chain_member (r, BLOCK_VARS (outer)))
12373 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12375 current_function_return_value = NULL_TREE;
12378 /* Remember that we were in class scope. */
12379 if (current_class_name)
12380 ctype = current_class_type;
12382 /* Must mark the RESULT_DECL as being in this function. */
12383 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12385 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12386 to the FUNCTION_DECL node itself. */
12387 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12389 /* Save away current state, if appropriate. */
12390 if (!processing_template_decl)
12391 save_function_data (fndecl);
12393 /* Complain if there's just no return statement. */
12394 if (warn_return_type
12395 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12396 && !dependent_type_p (TREE_TYPE (fntype))
12397 && !current_function_returns_value && !current_function_returns_null
12398 /* Don't complain if we abort or throw. */
12399 && !current_function_returns_abnormally
12400 && !DECL_NAME (DECL_RESULT (fndecl))
12401 && !TREE_NO_WARNING (fndecl)
12402 /* Structor return values (if any) are set by the compiler. */
12403 && !DECL_CONSTRUCTOR_P (fndecl)
12404 && !DECL_DESTRUCTOR_P (fndecl))
12406 warning (OPT_Wreturn_type,
12407 "no return statement in function returning non-void");
12408 TREE_NO_WARNING (fndecl) = 1;
12411 /* Store the end of the function, so that we get good line number
12412 info for the epilogue. */
12413 cfun->function_end_locus = input_location;
12415 /* Genericize before inlining. */
12416 if (!processing_template_decl)
12418 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12419 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12420 cp_genericize (fndecl);
12421 /* Clear out the bits we don't need. */
12422 f->x_current_class_ptr = NULL;
12423 f->x_current_class_ref = NULL;
12424 f->x_eh_spec_block = NULL;
12425 f->x_in_charge_parm = NULL;
12426 f->x_vtt_parm = NULL;
12427 f->x_return_value = NULL;
12428 f->bindings = NULL;
12429 f->extern_decl_map = NULL;
12431 /* Clear out the bits we don't need. */
12432 local_names = NULL;
12434 /* We're leaving the context of this function, so zap cfun. It's still in
12435 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12437 current_function_decl = NULL;
12439 /* If this is an in-class inline definition, we may have to pop the
12440 bindings for the template parameters that we added in
12441 maybe_begin_member_template_processing when start_function was
12443 if (inclass_inline)
12444 maybe_end_member_template_processing ();
12446 /* Leave the scope of the class. */
12448 pop_nested_class ();
12454 /* Let the error reporting routines know that we're outside a
12455 function. For a nested function, this value is used in
12456 cxx_pop_function_context and then reset via pop_function_context. */
12457 current_function_decl = NULL_TREE;
12459 defer_mark_used_calls = false;
12460 if (deferred_mark_used_calls)
12465 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12467 VEC_free (tree, gc, deferred_mark_used_calls);
12473 /* Create the FUNCTION_DECL for a function definition.
12474 DECLSPECS and DECLARATOR are the parts of the declaration;
12475 they describe the return type and the name of the function,
12476 but twisted together in a fashion that parallels the syntax of C.
12478 This function creates a binding context for the function body
12479 as well as setting up the FUNCTION_DECL in current_function_decl.
12481 Returns a FUNCTION_DECL on success.
12483 If the DECLARATOR is not suitable for a function (it defines a datum
12484 instead), we return 0, which tells yyparse to report a parse error.
12486 May return void_type_node indicating that this method is actually
12487 a friend. See grokfield for more details.
12489 Came here with a `.pushlevel' .
12491 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12492 CHANGES TO CODE IN `grokfield'. */
12495 start_method (cp_decl_specifier_seq *declspecs,
12496 const cp_declarator *declarator, tree attrlist)
12498 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12501 if (fndecl == error_mark_node)
12502 return error_mark_node;
12504 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12506 error ("invalid member function declaration");
12507 return error_mark_node;
12511 cplus_decl_attributes (&fndecl, attrlist, 0);
12513 /* Pass friends other than inline friend functions back. */
12514 if (fndecl == void_type_node)
12517 if (DECL_IN_AGGR_P (fndecl))
12519 if (DECL_CONTEXT (fndecl)
12520 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12521 error ("%qD is already defined in class %qT", fndecl,
12522 DECL_CONTEXT (fndecl));
12523 return error_mark_node;
12526 check_template_shadow (fndecl);
12528 DECL_DECLARED_INLINE_P (fndecl) = 1;
12529 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12531 /* We process method specializations in finish_struct_1. */
12532 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12534 fndecl = push_template_decl (fndecl);
12535 if (fndecl == error_mark_node)
12539 if (! DECL_FRIEND_P (fndecl))
12541 if (TREE_CHAIN (fndecl))
12543 fndecl = copy_node (fndecl);
12544 TREE_CHAIN (fndecl) = NULL_TREE;
12548 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12550 /* Make a place for the parms. */
12551 begin_scope (sk_function_parms, fndecl);
12553 DECL_IN_AGGR_P (fndecl) = 1;
12557 /* Go through the motions of finishing a function definition.
12558 We don't compile this method until after the whole class has
12561 FINISH_METHOD must return something that looks as though it
12562 came from GROKFIELD (since we are defining a method, after all).
12564 This is called after parsing the body of the function definition.
12565 STMTS is the chain of statements that makes up the function body.
12567 DECL is the ..._DECL that `start_method' provided. */
12570 finish_method (tree decl)
12572 tree fndecl = decl;
12577 if (decl == void_type_node)
12580 old_initial = DECL_INITIAL (fndecl);
12582 /* Undo the level for the parms (from start_method).
12583 This is like poplevel, but it causes nothing to be
12584 saved. Saving information here confuses symbol-table
12585 output routines. Besides, this information will
12586 be correctly output when this method is actually
12589 /* Clear out the meanings of the local variables of this level;
12590 also record in each decl which block it belongs to. */
12592 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12594 if (DECL_NAME (link) != NULL_TREE)
12595 pop_binding (DECL_NAME (link), link);
12596 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12597 DECL_CONTEXT (link) = NULL_TREE;
12600 poplevel (0, 0, 0);
12602 DECL_INITIAL (fndecl) = old_initial;
12608 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12609 we can lay it out later, when and if its type becomes complete. */
12612 maybe_register_incomplete_var (tree var)
12614 gcc_assert (TREE_CODE (var) == VAR_DECL);
12616 /* Keep track of variables with incomplete types. */
12617 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12618 && DECL_EXTERNAL (var))
12620 tree inner_type = TREE_TYPE (var);
12622 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12623 inner_type = TREE_TYPE (inner_type);
12624 inner_type = TYPE_MAIN_VARIANT (inner_type);
12626 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12627 /* RTTI TD entries are created while defining the type_info. */
12628 || (TYPE_LANG_SPECIFIC (inner_type)
12629 && TYPE_BEING_DEFINED (inner_type)))
12630 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12634 /* Called when a class type (given by TYPE) is defined. If there are
12635 any existing VAR_DECLs whose type has been completed by this
12636 declaration, update them now. */
12639 complete_vars (tree type)
12641 tree *list = &incomplete_vars;
12643 gcc_assert (CLASS_TYPE_P (type));
12646 if (same_type_p (type, TREE_PURPOSE (*list)))
12648 tree var = TREE_VALUE (*list);
12649 tree type = TREE_TYPE (var);
12650 /* Complete the type of the variable. The VAR_DECL itself
12651 will be laid out in expand_expr. */
12652 complete_type (type);
12653 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12654 /* Remove this entry from the list. */
12655 *list = TREE_CHAIN (*list);
12658 list = &TREE_CHAIN (*list);
12661 /* Check for pending declarations which may have abstract type. */
12662 complete_type_check_abstract (type);
12665 /* If DECL is of a type which needs a cleanup, build and return an
12666 expression to perform that cleanup here. Return NULL_TREE if no
12667 cleanup need be done. */
12670 cxx_maybe_build_cleanup (tree decl)
12676 /* Assume no cleanup is required. */
12677 cleanup = NULL_TREE;
12679 if (error_operand_p (decl))
12682 /* Handle "__attribute__((cleanup))". We run the cleanup function
12683 before the destructor since the destructor is what actually
12684 terminates the lifetime of the object. */
12685 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12692 /* Get the name specified by the user for the cleanup function. */
12693 id = TREE_VALUE (TREE_VALUE (attr));
12694 /* Look up the name to find the cleanup function to call. It is
12695 important to use lookup_name here because that is what is
12696 used in c-common.c:handle_cleanup_attribute when performing
12697 initial checks on the attribute. Note that those checks
12698 include ensuring that the function found is not an overloaded
12699 function, or an object with an overloaded call operator,
12700 etc.; we can rely on the fact that the function found is an
12701 ordinary FUNCTION_DECL. */
12702 fn = lookup_name (id);
12703 arg = build_address (decl);
12705 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12707 tf_warning_or_error);
12709 /* Handle ordinary C++ destructors. */
12710 type = TREE_TYPE (decl);
12711 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12713 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12714 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12715 && CLASSTYPE_VBASECLASSES (type));
12719 if (TREE_CODE (type) == ARRAY_TYPE)
12722 addr = build_address (decl);
12724 /* Optimize for space over speed here. */
12725 if (!has_vbases || flag_expensive_optimizations)
12726 flags |= LOOKUP_NONVIRTUAL;
12728 call = build_delete (TREE_TYPE (addr), addr,
12729 sfk_complete_destructor, flags, 0);
12731 cleanup = build_compound_expr (input_location, cleanup, call);
12739 /* When a stmt has been parsed, this function is called. */
12746 /* DECL was originally constructed as a non-static member function,
12747 but turned out to be static. Update it accordingly. */
12750 revert_static_member_fn (tree decl)
12753 tree function = TREE_TYPE (decl);
12754 tree args = TYPE_ARG_TYPES (function);
12756 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12757 != TYPE_UNQUALIFIED)
12758 error ("static member function %q#D declared with type qualifiers", decl);
12760 args = TREE_CHAIN (args);
12761 tmp = build_function_type (TREE_TYPE (function), args);
12762 tmp = build_qualified_type (tmp, cp_type_quals (function));
12763 tmp = build_exception_variant (tmp,
12764 TYPE_RAISES_EXCEPTIONS (function));
12765 TREE_TYPE (decl) = tmp;
12766 if (DECL_ARGUMENTS (decl))
12767 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12768 DECL_STATIC_FUNCTION_P (decl) = 1;
12771 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12772 one of the language-independent trees. */
12774 enum cp_tree_node_structure_enum
12775 cp_tree_node_structure (union lang_tree_node * t)
12777 switch (TREE_CODE (&t->generic))
12779 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12780 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12781 case OVERLOAD: return TS_CP_OVERLOAD;
12782 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12783 case PTRMEM_CST: return TS_CP_PTRMEM;
12784 case BASELINK: return TS_CP_BASELINK;
12785 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12786 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12787 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12788 default: return TS_CP_GENERIC;
12792 /* Build the void_list_node (void_type_node having been created). */
12794 build_void_list_node (void)
12796 tree t = build_tree_list (NULL_TREE, void_type_node);
12801 cp_missing_noreturn_ok_p (tree decl)
12803 /* A missing noreturn is ok for the `main' function. */
12804 return DECL_MAIN_P (decl);
12807 /* Return the COMDAT group into which DECL should be placed. */
12810 cxx_comdat_group (tree decl)
12814 /* Virtual tables, construction virtual tables, and virtual table
12815 tables all go in a single COMDAT group, named after the primary
12817 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12818 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12819 /* For all other DECLs, the COMDAT group is the mangled name of the
12820 declaration itself. */
12823 while (DECL_THUNK_P (decl))
12825 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12826 into the same section as the target function. In that case
12827 we must return target's name. */
12828 tree target = THUNK_TARGET (decl);
12829 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12830 && DECL_SECTION_NAME (target) != NULL
12831 && DECL_ONE_ONLY (target))
12836 name = DECL_ASSEMBLER_NAME (decl);
12842 #include "gt-cp-decl.h"